WEATHER 12/6/18

DAILY FIRE WEATHER & FIRE INFO

To: ALL UNITS From:
EMAIL: pdupree@bdcecs.org
Ph: OFFICE:(760) 559-3032
AFTER 2200 HRS CALL (760)-244-9790

RADIO:(HAM) KG6ZHW
COUNTY F.D RADIO: #733784 CALL SIGN: COM-330

Date: 12/6/18
SKYWARN: STAND BY
NETS ON WED NIGHT @1900 HEAPS PK./WX
SKYWARN NET TUESDAY @ 1900 HRS TABLE Mt.
BRIEFS TABLE MT. ON SUN @ 1800 HRS
DAYS NO R.F. @ STA.:00

National Preparedness Level (PL 1 )

Southern California Area
Preparedness Level: (PL 2 )

Northern California Area
Preparedness Level (PL 1 )

SYNOP:
A slow moving low pressure system will continue to bring periods of showers with wetting rainfall into tonight with a slight chance of thunderstorms near the coast, ending by Friday morning. Then
dry with a warming trend trough the weekend with high pressure aloft and with weak offshore flow bringing locally gusty northeast winds near the coastal mountain slopes. A low pressure system from the northwest will bring cooling and chance for showers on Tuesday followed by dry weather with a warming trend for Wednesday and Thursday.

An area of low pressure currently just off the Southern California Coast will move inland into Northern Baja early Friday morning. A weak ridge of high pressure will build into California from the Pacific Ocean Friday through this weekend. Another area of low pressure will form over Northern California Monday and then drop south into Southern California Tuesday. A weak ridge of high pressure will build into California from the Pacific Ocean next Wednesday and Thursday.
Showers will end from north to south through the day and finally end across Southern California late tonight. Most locations over Southern California will receive an additional 0.25 to 1.50 inches of rainfall, while most of Central California receives less than a quarter inch of additional rainfall through tonight.

· The snow level will be around 6,000 feet.
· Temperatures will be 5 to 10 degrees below normal, with mid 30s to mid 40s across the mountains and 50s to low 60s in the valleys.
· A warming and drying trend will occur Friday through this weekend.
· Temperatures will be near to a little below normal this weekend, with 40s to low 50s across the mountains and mid 50s to upper 60s in the valleys.
· Minimum humidity will be mainly between 15% and 30% this weekend.
· Scattered showers with light rainfall totals will spread from north to south across Central California Monday and then develop across Southern California Tuesday.
· Temperatures will cool early next week and be between 5 and 10 degrees below normal by Tuesday.
· Temperatures will warm a little and humidity will become low across the region next Wednesday and Thursday.

WEATHER SUMMARY
A storm system is moving through the region and has already brought rain to many parts of the region. Rain
will continue this evening, especially in San Diego County, then transition towards showers late tonight and
Thursday. The could be a few thunderstorms Thursday. The snow level will mostly be around 7000 feet with
the remainder of this storm, with locally heavy amounts above 7000′. Winds will be lighter with this storm
versus previous storms. Precipitation will end Thursday night.

Confidence Level: Moderate
Rainfall
Impacts
Debris flows possible in and below recent burn scars (low confidence)
Urban flooding possible
Minor flooding along the San Diego River possible by Thursday evening
Wet roads will create hazardous commuting conditions, especially this
Afternoon

Details & Locations
1-2″ coast, valleys, and coastal mountain slopes, locally higher (including rainfall which already occurred)
0.25-0.75″ in the deserts
Highest risk of rainfall rates to 0.50″/hr is on Thursday
Timing Heaviest rain through early this evening (mainly San Diego County) and again Thursday afternoon

Snowfall
Impacts Snow-covered roads over highest terrain, leading to hazardous travel conditions

Details & Locations
Snow levels 7000-7500 feet
2-6″ of snow above 7000 FT, with locally higher amounts near mountain Peaks Through Thursday night

NWS LAS VEGAS SYNOP– (NORTH & EAST OF COUNTY)
Expect cloudy skies with rain and mountain snow over much of the area today and tonight as a storm system passes across the region. The system is forecast to move east with clearing conditions on Friday. High pressure will bring dry and warmer weather to the entire area over the weekend.

SPECIAL NOTES:
PRECIPITATION SUMMARY….PRELIMINARY
NATIONAL WEATHER SERVICE SAN DIEGO
401 AM PST THURSDAY DEC 06 2018

2 DAY PRECIPITATION TOTALS AS OF 401 AM THURSDAY

.TOP RAINFALL AMOUNTS FROM ALL ZONES…

STATION PRECIP(IN) ELEVATION(FT)

1. MIDDLE FK LYTLE CREE 1.53 3740
UPPER DAY CANYON 1.53 5768
3. SNOW CK 7N IDYLLWILD 1.41 6800
4. LYTLE CREEK RAWS 1.19 2790
5. DEER CREEK DAM 1.06 2917
6. SD UNIVERSITY HEIGHT 0.91 345
7. BIRCH HILL 0.89 5645
8. MORMON ROCK RAWS 0.87 3300
9. LA JOLLA 0.86 275

SAN BERNARDINO COUNTY VALLEYS-THE INLAND EMPIRE…

ID STATION PRECIP(IN) ELEVATION(FT)

CUOC1 CUCAMONGA CANYON 0.74 1766
LTYC1 LYTLE CREEK CANYON 0.71 3060
TNOC1 SAN ANTONIO HEIGHTS 0.63 2335
DCDC1 DEMENS CK DEBRIS BSN 0.52 1900
LRAC1 LARSON RANCH 0.52 2121
LTOC1 LITTLE CHINO CK 0.51 646
CNOC1 CHINO HILLS 0.47 988
CUGC1 CUCAMONGA BASIN 0.44 1551
ONFC1 ONTARIO FS #4 0.44 1081
DACC1 DAY CANYON 0.43 1880
GLHC1 GLEN HELEN REG PARK 0.40 2000
SDCHL CORONA LUISENO 0.39 1395
SSSC1 SAN SEVAINE SPRDG GRD 0.39 1938
HBAC1 HEMLOCK BURN 0.36 2280
DLYC1 DALEY SPUR 0.35 2680
CSBC1 CAL ST SAN BERNARDINO 0.31 1556
DVEC1 DEVORE FIRE STATION 0.29 2080
ELYC1 ELY BASIN 0.28 832
CNO CHINO AIRPORT 0.28 650
PGKC1 PLUNGE CREEK CANYON 0.28 1590
WSOC1 WILSON CREEK 0.28 2235
YCPC1 YUCAIPA REGIONAL 0.28 2620
RIAC1 RIALTO CHANNEL 0.27 1018
RLOC1 RIALTO AIRPORT 0.24 1418
ERGC1 ELDER GULCH 0.24 2933
HPLC1 HIGHLAND PLUNGE CREEK 0.24 1911
RAFC1 CRAFTON RESERVOIR 0.24 2000
SBYC1 SAN BERNARDINO CO YRD 0.20 1033
RECC1 RECHE CANYON 0.20 1021
STTC1 SAN TIMOTEO LANDFILL 0.20 1766
GSPC1 GILBERT ST NR SBD 0.16 1120
ELDC1 ELDER CREEK 0.15 1649
SDMC1 SMALL CANYON DAM 0.12 1810
ONT ONTARIO AIRPORT 0.09 922

.SAN BERNARDINO COUNTY MOUNTAINS…

ID STATION PRECIP(IN) ELEVATION(FT)

MFLC1 MIDDLE FK LYTLE CREEK 1.53 3740
UDCC1 UPPER DAY CANYON 1.53 5768
LTLC1 LYTLE CREEK RAWS 1.19 2790
DECC1 DEER CREEK DAM 1.06 2917
MNCC1 MORMON ROCK RAWS 0.87 3300
RUSC1 RUNNING SPRINGS FS 0.77 6076
PPOC1 PANORAMA POINT 0.71 3887
SDANW LAKE ARROWHEAD NW 0.70 5450
SDBDY MT BALDY VILLAGE 0.69 4230
NYNC1 CABLE CANYON 0.67 5516
HHPC1 HEAPS PEAK RAWS 0.59 6350
SDSWP SNOW PEAK 0.57 * 7865
RWDC1 RAYWOOD FLATS 0.56 * 7097
CRQC1 CREST PARK 0.55 5624
WRT1 WRIGHTWOOD 0.50 5950
BBL1 BIG BEAR LAKE 0.44 6768
OAGC1 OAK GLEN WATERSHED 0.44 4923
CVEC1 CONVERSE RAWS 0.44 5200
BYCC1 BAILY CANYON 0.43 3388
CGLC1 CEDAR GLEN 0.43 5317
WRWC1 WRIGHTWOOD FS 0.37 6038
OFRC1 OAK GLEN FIRE 0.36 4664
SWYC1 STRAWBERRY CREEK 0.36 2986
MZTC1 MANZANITA FLATS 0.34 3920
FWSC1 FAWNSKIN RAWS 0.33 6903
CKCC1 CITY CREEK RANGER STA 0.27 2647
SDCRR CRESTLINE RIDGE 0.25 5300
SDARW LAKE ARROWHEAD WEST 0.25 5360
EEPC1 DEEP CREEK 0.24 4839
HBRC1 HEART BAR 0.24 6690
PHEC1 PHELAN LANDFILL 0.20 4099
WWCC1 WILDWOOD CANYON 0.19 2946
SDARN LAKE ARROWHEAD N 0.16 5180
YUCC1 YUCAIPA RIDGE 0.16 * 9020
BPFC1 BIG PINE FLAT RAWS 0.13 6908

.APPLE AND LUCERNE VALLEYS…

ID STATION PRECIP(IN) ELEVATION(FT)

ANWC1 ANTELOPE CREEK WASH 0.17 3103
SDHES HESPERIA (WEATHER OPS) 0.14 3580
SDVSW VICTORVILLE SOUTHWEST 0.13 3170
MVDC1 MOJAVE FORKS DAM 0.11 2449
DKWC1 DESERT KNOLLS WASH 0.10 2808
GNTC1 GRANITE MOUNTAIN RAWS 0.09 4720
SVSC1 HELENDALE 0.08 2428
VLFC1 VICTORVILLE LANDFILL 0.07 2959
SDLUR LUCERNE VALLEY 0.06 3035
ADTC1 ADELANTO 0.06 2896
OGDC1 ORO GRANDE 0.04 2798
APLC1 APPLE VALLEY 0.03 2762
MNLC1 MEANS LAKE RAWS 0.01 2900

&&

NOTICE…THIS REPORT CONTAINS PROVISIONAL DATA FROM AUTOMATED
GAUGES. THE ACCURACY OF THIS DATA HAS NOT BE VERIFIED.

*STATIONS ABOVE THE FREEZING LEVEL MAY NOT SHOW ACCURATE
ACCUMULATING PRECIPITATION.

DAILY FUELS/FIRE POTENTIAL:
There will be little or no fire activity across the region through the forecast period

SANTA ANA WILDFIRE THREAT INDEX: TODAY: GREY-NO RATING

NO RATING: Sundowner winds are either not expected, or will not contribute to
significant fire activity.

MARGINAL: Upon ignition, fires may grow rapidly.

MODERATE: Upon ignition, fires will grow rapidly and will be difficult to control.

HIGH: Upon ignition, fires will grow very rapidly, will burn intensely, and will be very difficult to control

EXTREME: Upon ignition, fires will have extreme growth, will burn very intensely, and will be uncontrollable.

Zones NOV.29 NOV. 30 DEC.1 DEC. 2 DEC. 3 DEC. 4
Zone 1:
LA-Ventura NO RATE NO RATE NO RATE NO RATE NO RATE NO RATE
Zone 2:
Orange-Inland Empire NO RATE NO RATE NO RATE NO RATE NO RATE NO RATE
Zone 3:
San Diego NO RATE NO RATE NO RATE NO RATE NO RATE NO RATE
Zone 4:
Santa Barbara NO RATE NO RATE NO RATE NO RATE NO RATE NO RATE

——————————————————————-
APPLE VALLEY / HESPERIA-VICTOR VALLEY (CAZ260):
THURSDAY… Sky/weather………Cloudy. Showers likely.
Max temperature…..44 to 49. 24 HR TREND……Down 4 degrees.
Min humidity……..55 to 65 percent. 24 HR TREND……Up 35 percent.
WIND (20 FT)……..Winds east 6 to 11 mph with gusts to 25 mph.
CWR (>0.10 IN)……66 percent. LAL……………..1.

.THURSDAY NIGHT… Sky/weather………Mostly cloudy. Chance of showers in the evening, then slight chance of showers after midnight.
Min temperature…..35 to 40. 24 HR TREND……Little change.
Max humidity……..90 to 100 percent. 24 HR TREND……Little change.
WIND (20 FT)……..Winds northeast 6 to 9 mph.
CWR (>0.10 IN)……14 percent. LAL……………..1.

.FRIDAY… Sky/weather………Partly cloudy.
Max temperature…..51 to 56. 24 HR TREND……Up 8 degrees.
Min humidity……..40 to 50 percent. 24 HR TREND……Down 30 percent.
WIND (20 FT)……..Winds north around 6 mph.
CWR (>0.10 IN)……4 percent. LAL……………..1.

WRIGHTWOOD:
WINTER WEATHER ADVISORY FOR THE MOUNTAINS OF SAN BERNARDINO COUNTY ABOVE 6500 FEET
Thursday
Rain and snow showers. High near 36. Southeast wind 5 to 10 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.
Thursday Night
Rain and snow showers likely, mainly before 10pm. Mostly cloudy, with a low around 31. Calm wind becoming north around 5 mph after midnight. Chance of precipitation is 60%. Little or no snow accumulation expected.
Friday
Mostly sunny, with a high near 42. North wind around 5 mph.
Friday Night
Mostly clear, with a low around 33.

BIG PINES / WEST WRIGHTWOOD AREA
WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT PST TONIGHT
Thursday
Showers. High near 39. South wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.
Thursday Night
Showers likely, mainly before 10pm. Mostly cloudy, with a low around 29. Southeast wind around 5 mph. Chance of precipitation is 60%.
Friday
Mostly sunny, with a high near 46. North wind around 5 mph.
Friday Night
Mostly clear, with a low around 32.

PHELAN:
Thursday
Showers. High near 42. Calm wind becoming east around 5 mph in the afternoon. Chance of precipitation is 80%. New precipitation amounts between a half and three quarters of an inch possible.
Thursday Night
A chance of showers. Cloudy, then gradually becoming partly cloudy, with a low around 37. North wind around 5 mph. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.
Friday
Mostly sunny, with a high near 50. North wind around 5 mph.
Friday Night
Mostly clear, with a low around 37.

TRONA:
Thursday
Rain likely, mainly between 10am and 4pm. Cloudy, with a high near 53. North northeast wind 7 to 10 mph. Chance of precipitation is 70%.
Thursday Night
A 40 percent chance of rain, mainly before 10pm. Mostly cloudy, with a low around 38. North northeast wind 3 to 5 mph.
Friday
Sunny, with a high near 61. Calm wind.
Friday Night
Mostly clear, with a low around 37

BARSTOW / DAGGETT / BAKER / FT. IRWIN (CAZ228):
TODAY… * Sky/Weather………Mostly cloudy. Scattered rain showers in the morning, then numerous showers in the afternoon.
* Max temperature: * Valley floor….51-56. * 24 hr trend…..On average down 5 degrees.
* Min humidity: * Valley floor….49-59 percent. * 24 hr trend…..On average up 30 percent.
* Wind (Slope/valley=20 ft, 10 min avg):
* Valley floor….East wind up to 10 mph.
* 10000 ft msl….South 10 to 20 mph increasing to 15 to 25 mph in the afternoon.
* CWR (>= 0.10 in)….30 percent increasing to 65 percent in the afternoon. * LAL……………..1.
* Haines Index……..3.

.TONIGHT… * Sky/Weather………Mostly cloudy. Numerous rain showers in the evening, then scattered showers after midnight.
* Min temperature:
* Valley floor….34-39. * 24 hr trend…..Little change.
* Max humidity:
* Valley floor….87-92 percent. * 24 hr trend…..On average up 19 percent.
* Wind (Slope/valley=20 ft, 10 min avg):
* Valley floor….Northeast wind up to 10 mph in the evening becoming downslope/downvalley 2 to 5 mph.
* 10000 ft msl….South 15 to 20 mph becoming 15 to 25 mph after midnight.
* CWR (>= 0.10 in)….60 percent decreasing to 25 percent after midnight. * LAL……………..1.
* Haines Index……..3.

.FRIDAY… * Sky/Weather………Mostly sunny.
* Max temperature: * Valley floor….59-64. * 24 hr trend…..On average up 8 degrees.
* Min humidity: * Valley floor….40-50 percent. * 24 hr trend…..On average down 9 percent.
* Wind (Slope/valley=20 ft, 10 min avg):
* Valley floor….Northwest wind up to 10 mph.
* 10000 ft msl….Southeast up to 10 mph.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1.
* Haines Index……..2.

BAKER:
Thursday
A 50 percent chance of rain. Cloudy, with a high near 54. North northwest wind 3 to 7 mph.
Thursday Night
A 50 percent chance of rain, mainly before 10pm. Mostly cloudy, with a low around 39. North northwest wind around 8 mph.
Friday
Sunny, with a high near 63. North northwest wind around 9 mph.
Friday Night
Clear, with a low around 36. North wind 3 to 5 mph.

SOUTHERN OWENS VALLEY / EAST SIERRA FOOTHILLS:
.TODAY… * Sky/Weather………Mostly cloudy then becoming partly cloudy. Snow showers likely in the morning. Numerous rain showers through the day. Snow showers in the afternoon.
* Max temperature: * Valley floor….46-51. * 7000 feet…….32-37. * 24 hr trend…..On average down 3 degrees.
* Min humidity: * Valley floor….56-66 percent. * 7000 feet…….77-87 percent. * 24 hr trend..On average up 23 percent.
* Wind (slope/valley=20 ft, 10 min avg):
* Slope/valley….Upslope/upvalley 4 to 8 mph.
* Upper slopes….Upslope/upvalley 4 to 8 mph becoming northeast up to 10 mph in the afternoon.
* 10000 ft msl….South 15 to 20 mph shifting to the southeast 15 to 25 mph in the afternoon.
* CWR (>= 0.10 in)….70 percent. * LAL……………..1.
* Haines Index……..3.

.TONIGHT… * Sky/Weather………Mostly cloudy then becoming partly cloudy. Scattered rain showers and snow showers in the evening, then isolated showers and snow showers after midnight.
* Min temperature: * Valley floor….26-31. * 7000 feet…….8-13. * 24 hr trend…..Little change.
* Max humidity: Valley floor….74-79 percent. *7000 feet…….89-94 percent. * 24 hr trend..On average down 4 percent.
* Wind (slope/valley=20 ft, 10 min avg):
* Slope/valley….Downslope/downvalley 2 to 5 mph becoming northwest up to 10 mph after midnight.
* Upper slopes….Northwest winds up to 10 mph.
* 10000 ft msl….Southeast 10 to 20 mph becoming 10 to 15 mph after midnight.
* CWR (>= 0.10 in)….20 percent decreasing to 5 percent after midnight.
* LAL……………..1.
* Haines Index……..2.

.FRIDAY… * Sky/Weather………Sunny.
* Max temperature: * Valley floor….52-57. * 7000 feet…….38-43. * 24 hr trend…..On average up 6 degrees.
* Min humidity: * Valley floor….39-49 percent. * 7000 feet…….41-51 percent. * 24 hr trend…..On average down 26 percent.
* Wind (slope/valley=20 ft, 10 min avg):
* Slope/valley….Upslope/upvalley 4 to 8 mph.
* Upper slopes….Northwest winds up to 10 mph.
* 10000 ft msl….Light and variable becoming northwest up to 10 mph in the afternoon.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1.
* Haines Index……..2.

INLAND EMPIRE (CAZ248):
THURSDAY… Sky/weather………Cloudy. Showers.
Max temperature…..52 to 59. 24 HR TREND……Up 2 degrees.
Min humidity……..65 to 75 percent. 24 HR TREND……Up 25 percent.
WIND (20 FT)……..Winds east 6 to 14 mph with gusts to 30 mph.
CWR (>0.10 IN)……89 percent. LAL……………..1.

.THURSDAY NIGHT… Sky/weather………Mostly cloudy…becoming partly cloudy. Showers likely in the evening, then chance of showers after midnight.
Min temperature…..42 to 49. 24 HR TREND……Down 4 degrees.
Max humidity……..85 to 95 percent. 24 HR TREND……Little change.
WIND (20 FT)……..Winds east 6 to 9 mph becoming north 6 to 11 mph after midnight. Gusts to 20 mph.
CWR (>0.10 IN)……21 percent. LAL……………..1.

.FRIDAY… Sky/weather………Partly cloudy…becoming mostly sunny.
Max temperature…..59 to 66. 24 HR TREND……Up 6 degrees.
Min humidity……..45 to 55 percent. 24 HR TREND……Down 30 percent.
WIND (20 FT)……..Winds north 6 to 11 mph with gusts to 25 mph.
CWR (>0.10 IN)……4 percent. LAL……………..1.

DEVORE:
Thursday
Showers. High near 52. North wind 5 to 10 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
Thursday Night
Showers likely, mainly before 10pm. Mostly cloudy, with a low around 48. North wind 10 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Friday
Sunny, with a high near 60. North wind 15 to 20 mph, with gusts as high as 35 mph.
Friday Night
Mostly clear, with a low around 49. Breezy.

CHINO HILLS:
Thursday
Showers. High near 56. East wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Thursday Night
Showers likely, mainly before 10pm. Mostly cloudy, with a low around 48. East wind around 10 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Friday
Sunny, with a high near 64. East wind 5 to 10 mph becoming west in the afternoon.
Friday Night
Mostly clear, with a low around 47.

COLTON:
Thursday
Showers. High near 57. Northwest wind 5 to 10 mph becoming light and variable. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Thursday Night
Showers likely, mainly before 10pm. Mostly cloudy, with a low around 48. Calm wind becoming north around 5 mph after midnight. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Friday
Sunny, with a high near 65. North wind 5 to 10 mph.
Friday Night
Mostly clear, with a low around 48.

SAN BERNARDINO N.F. (CAZ255/CAZ256):
WINTER WEATHER ADVISORY FOR THE MOUNTAINS OF SAN BERNARDINO COUNTY ABOVE 6500 FEET
.THURSDAY… Sky/weather………Cloudy. Showers likely in the morning, then showers in the afternoon.
Max temperature…..31 to 39 above 6000 feet to 39 to 47 below 6000 feet. 24 HR TREND……Down 5 degrees.
Min humidity……..70 to 80 percent. 24 HR TREND……Up 40 percent.
WIND (20 FT)……..
SLOPES………..Winds east 6 to 14 mph with gusts to 30 mph.
RIDGETOP………Winds south 6 to 14 mph with gusts to 30 mph.
CWR (>0.10 IN)……87 percent. LAL……………..1.

.THURSDAY NIGHT… Sky/weather………Mostly cloudy. Showers likely in the evening, then chance of showers after midnight.
Min temperature…..22 to 31 above 6000 feet to 30 to 39 below 6000 feet. 24 HR TREND……Up 1 degree.
Max humidity…90 to 100 percent on desert slopes to 85 to 95 percent on coastal slopes. 24 HR TREND…Little change.
WIND (20 FT)……..
SLOPES………..Winds east 6 to 8 mph.
RIDGETOP………Winds south 6 to 9 mph. Gusts to 20 mph in the evening.
CWR (>0.10 IN)……19 percent. LAL……………..1.

.FRIDAY… Sky/weather………Partly cloudy.
Max temperature…..38 to 46 above 6000 feet to 43 to 50 below 6000 feet. 24 HR TREND……Up 5 degrees.
Min humidity……..45 to 55 percent. 24 HR TREND……Down 30 percent.
WIND (20 FT)……..
SLOPES………..Winds north 6 to 10 mph with gusts to 20 mph.
RIDGETOP………Winds north 6 to 11 mph. Gusts to 20 mph in the afternoon.
CWR (>0.10 IN)……5 percent. LAL……………..1.

LAKE ARROWHEAD SCHOOL- AREA:
WINTER WEATHER ADVISORY FOR THE MOUNTAINS OF SAN BERNARDINO COUNTY ABOVE 6500 FEET
Thursday
Showers. High near 42. Southwest wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
Thursday Night
Showers likely, mainly before 10pm. Mostly cloudy, with a low around 33. Calm wind becoming northeast around 5 mph after midnight. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday
Mostly sunny, with a high near 48. North wind around 10 mph, with gusts as high as 20 mph.
Friday Night
Mostly clear, with a low around 34.

BIG BEAR SCHOOL AREA: ‘
WINTER WEATHER ADVISORY FOR THE MOUNTAINS OF SAN BERNARDINO COUNTY ABOVE 6500 FEET
Thursday
Snow showers. High near 37. Southwest wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.
Thursday Night
Snow showers likely, mainly before 10pm. Mostly cloudy, with a low around 25. Southwest wind 5 to 10 mph becoming light and variable in the evening. Chance of precipitation is 70%. Little or no snow accumulation expected.
Friday
Mostly sunny, with a high near 40. Northeast wind around 5 mph becoming north in the afternoon.
Friday Night
Mostly clear, with a low around 23.

BANNING PASS:
.THURSDAY… Sky/weather………Mostly cloudy. Chance of showers in the morning, then showers likely in the afternoon.
Max temperature…..53 to 58. 24 HR TREND……Down 8 degrees.
Min humidity……..60 to 70 percent. 24 HR TREND……Up 40 percent.
WIND (20 FT)……..Variable 1 to 3 mph.
CWR (>0.10 IN)……70 percent. LAL……………..1.

.THURSDAY NIGHT… Sky/weather………Cloudy…becoming partly cloudy. Showers likely in the evening, then chance of showers after midnight. Min temperature…..45 to 52. 24 HR TREND……Up 2 degrees.
Max humidity……..75 to 85 percent. 24 HR TREND……Up 15 percent.
WIND (20 FT)……..Variable 1 to 3 mph.
CWR (>0.10 IN)……18 percent. LAL……………..1.

.FRIDAY… Sky/weather………Partly cloudy.
Max temperature…..65 to 70. 24 HR TREND……Up 10 degrees.
Min humidity……..40 to 50 percent. 24 HR TREND……Down 25 percent.
WIND (20 FT)……..Variable 1 to 3 mph.
CWR (>0.10 IN)……4 percent. LAL……………..1.

JOSHUA TREE AREA (CAZ261):
.TODAY… * Sky/weather…………………Mostly cloudy. Showers likely.
* Max Temperature……………..43-53. * 24 hr trend………………5 degrees cooler.
* Min Humidity………………..60-76 pct. * 24 hr trend………………44 pct wetter.
* Winds – 20 foot…Slope/Valley..Southeast 5 to 15 mph.
* Winds…10000 FT MSL…………South 15 to 25 mph.
* Chance of Precip…………….70 percent. * CWR (>= 0.10 IN)…………….70 percent. * LAL………………………..1.
* Haines High Level Index………2 or very low potential for large plume dominated fire growth.

.TONIGHT… * Sky/weather…………………Mostly cloudy. Showers likely in the evening becoming chance of showers after midnight.
* Min Temperature……………..36-44. * 24 hr trend………………Little change.
* Max Humidity………………..93-100 pct. * 24 hr trend………………10 pct wetter.
* Winds – 20 foot…Slope/Valley..Light and variable in the evening becoming northwest 5 to 10 mph after midnight.
* Winds…10000 FT MSL…………Southwest 10 to 20 mph.
* Chance of Precip…………….60 percent. * CWR (>= 0.10 IN)…………….60 percent. * LAL………………………..1.

.FRIDAY… * Sky/weather…………………Partly sunny.
* Max Temperature……………..49-60. * 24 hr trend………………6 degrees warmer.
* Min Humidity………………..48-65 pct. * 24 hr trend………………12 pct drier.
* Winds – 20 foot…Slope/Valley..North 5 to 15 mph.
* Winds…10000 FT MSL…………Northwest 10 to 20 mph.
* Chance of Precip…………….0 percent. * CWR (>= 0.10 IN)…………….0 percent. * LAL………………………..1.
* Haines High Level Index………3 or very low potential for large plume dominated fire growth.

NEEDLES, RIVER BAT. (CAZ229):
TODAY… Sky/Weather…Mostly cloudy. Scattered rain showers in the morning, then numerous showers in the afternoon.
* Max temperature: * Valley floor….57-62. * 24 hr trend…..On average down 3 degrees.
* Min humidity: * Valley floor….37-47 percent. * 24 hr trend…..On average up 19 percent.
* Wind (Slope/valley=20 ft, 10 min avg):
* Valley floor….Upslope/upvalley 4 to 8 mph.
* 10000 ft msl….South 10 to 15 mph.
* CWR (>= 0.10 in)….30 percent. * LAL……………..1.
* Haines Index……..2.
* Mixing height…….4500 ft agl.
* Transport winds…..Light winds.
* Ventilation………Fair.

.TONIGHT… * Sky/Weather………Mostly cloudy. Numerous rain showers.
* Min temperature: * Valley floor….39-44. * 24 hr trend…..Little change.
* Max humidity: * Valley floor….88-93 percent. * 24 hr trend…..On average up 35 percent.
* Wind (Slope/valley=20 ft, 10 min avg):
* Valley floor….Downslope/downvalley 2 to 5 mph.
* 10000 ft msl….South 15 to 20 mph becoming 10 to 20 mph after midnight.
* CWR (>= 0.10 in)….75 percent decreasing to 50 percent after midnight. * LAL……………..1.
* Haines Index……..3.

.FRIDAY… * Sky/Weather………Partly cloudy then becoming mostly sunny. Isolated rain showers in the morning.
* Max temperature: * Valley floor….63-68. * 24 hr trend…..On average up 6 degrees.
* Min humidity: * Valley floor….41-51 percent. * 24 hr trend…..On average up 4 percent.
* Wind (Slope/valley=20 ft, 10 min avg):
* Valley floor….North wind up to 10 mph.
* 10000 ft msl….South 10 to 15 mph in the morning becoming light and variable.
* CWR (>= 0.10 in)….5 percent. * LAL……………..1.
* Haines Index……..3.
* Mixing height…….6600 ft agl.
* Transport winds…..North 10 to 15 knots.
* Ventilation………Very good.

STATELINE – CLARK COUNTY BORDER:
TODAY… *Sky/Weather…Mostly cloudy. Scattered snow showers in the morning. Scattered rain showers through the day.
* Max temperature: * 4000 feet…….52-57. * 24 hr trend…..Little change.
* Min humidity: * 4000 feet…….39-49 percent. * 24 hr trend…..On average up 17 percent.
* Wind (slope/valley=20 ft, 10 min avg):
* Slope/valley….Upslope/upvalley 4 to 8 mph.
* 10000 ft msl….South 10 to 15 mph.
* CWR (>= 0.10 in)….5 percent increasing to 30 percent in the afternoon. * LAL……………..1.
* Haines Index……..2.
* Mixing height…….3800 ft agl.
* Transport winds…..Light winds.
* Ventilation………Marginal.

.TONIGHT… Sky/Weather..Mostly cloudy. Numerous rain showers in the evening, then scattered showers after midnight.
* Min temperature: * 4000 feet…….31-36. * 24 hr trend…..Little change.
* Max humidity: * 4000 feet…….91-96 percent. * 24 hr trend…..On average up 28 percent.
* Wind (slope/valley=20 ft, 10 min avg):
* Slope/valley….Downslope/downvalley 2 to 5 mph.
* 10000 ft msl….South 10 to 15 mph.
* CWR (>= 0.10 in)….65 percent decreasing to 25 percent after midnight. * LAL……………..1.
* Haines Index……..3.

.FRIDAY… * Sky/Weather………Mostly sunny.
* Max temperature: * 4000 feet…….56-61. * 24 hr trend…..On average up 4 degrees.
* Min humidity: * 4000 feet…….43-53 percent. * 24 hr trend…..On average up 4 percent.
* Wind (slope/valley=20 ft, 10 min avg):
* Slope/valley….Upslope/upvalley 4 to 8 mph.
* 10000 ft msl….South 10 to 15 mph in the morning becoming light and variable.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1.
* Haines Index……..2.
* Mixing height…….5200 ft agl.
* Transport winds…..Light winds.
* Ventilation………Fair.

*************************** OUT OF COUNTY ********************************
LOS ANGELS CO. SAN GABRIEL VALLEY (CAZ247/CAZ249):
THURSDAY… Sky/weather………Mostly cloudy. Showers.
Max temperature…..56-62. 24 hr trend……Little change.
Min humidity……..60-70 percent. 24 hr trend……Up 30.
20-foot winds…….East 6-12 mph.
Marine layer……..None.
LAL……………..1. CWR (>0.10 IN)……80 percent.

.THURSDAY NIGHT… Sky/weather………Mostly cloudy. Showers likely in the evening, then chance of showers.
Min temperature…..46-51.
Max humidity……..75-100 percent.
20-foot winds…….East 6-12 mph early becoming variable 3-6 mph.
LAL……………..1. CWR (>0.10 IN)……60 percent.

.FRIDAY… Sky/weather………Partly cloudy then becoming mostly sunny.
Max temperature…..63-69.
Min humidity……..40-50 percent.
20-foot winds…….Variable 3-8 mph becoming southwest 6-12 mph late.
LAL……………..1. CWR (>0.10 IN)……0 percent.

LOS ANGELES COUNTY SAN FERNANDO VALLEY:
THURSDAY… Sky/weather………Mostly cloudy. Showers.
Max temperature…..54-62. 24 hr trend……Little change.
Min humidity……..55-70 percent. 24 hr trend……Up 17.
20-foot winds…….North to northeast 6-12 mph with gusts to 20 mph.
Marine layer……..None.
LAL……………..1. CWR (>0.10 IN)……70 percent.

.THURSDAY NIGHT… Sky/weather………Mostly cloudy. Showers likely in the evening, then slight chance of showers.
Min temperature…..44-50.
Max humidity……..70-100 percent.
20-foot winds…….Northeast 6-12 mph. Gusts to 20 mph early.
LAL……………..1. CWR (>0.10 IN)……30 percent.

.FRIDAY… Sky/weather………Mostly sunny.
Max temperature…..63-69.
Min humidity……..35-45 percent.
20-foot winds…….Variable 3-8 mph.
LAL……………..1. CWR (>0.10 IN)……0 percent.

SANTA CLARITA VALLEY:
THURSDAY… Sky/weather………Mostly cloudy. Showers likely.
Max temperature…..50-56. 24 hr trend……Down 3.
Min humidity……..55-65 percent. 24 hr trend……Up 20.
20-foot winds…….Northeast 8-15 mph with gusts to 25 mph.
Marine layer……..None.
LAL……………..1. CWR (>0.10 IN)……60 percent.

.THURSDAY NIGHT… Sky/weather………Mostly cloudy. Chance of showers in the evening, then slight chance of showers.
Min temperature…..42-47.
Max humidity……..75-85 percent.
20-foot winds…….Northeast 8-15 mph with gusts to 25 mph early becoming 6-12 mph with gusts to 20 mph.
LAL……………..1. CWR (>0.10 IN)……30 percent.

.FRIDAY… Sky/weather………Mostly sunny.
Max temperature…..60-66.
Min humidity……..35-45 percent.
20-foot winds…….Northeast 6-12 mph with gusts to 20 mph.
LAL……………..1. CWR (>0.10 IN)……0 percent.

SANTA MONICA MOUNTAINS RECREATIONAL AREA:
THURSDAY… Sky/weather………Mostly cloudy. Showers.
Max temperature…..53-61. 24 hr trend……Little change.
Min humidity……..55-65 percent. 24 hr trend……Up 8.
20-foot winds…….
Valleys/lwr slopes…East 6-12 mph with gusts to 20 mph.
Ridges/upr slopes….Southeast 6-12 mph with gusts to 20 mph.
Marine layer……..None.
LAL……………..1. CWR (>0.10 IN)……70 percent.

.THURSDAY NIGHT… Sky/weather………Mostly cloudy then becoming partly cloudy. Chance of showers in the evening, then slight chance of showers.
Min temperature…..45-52.
Max humidity……..65-80 percent.
20-foot winds…….
Valleys/lwr slopes…Northeast 6-12 mph with gusts to 20 mph.
Ridges/upr slopes….Northeast 6-12 mph with gusts to 20 mph.
LAL……………..1. CWR (>0.10 IN)……30 percent.

.FRIDAY… Sky/weather………Mostly sunny.
Max temperature…..56-66.
Min humidity……..40-50 percent.
20-foot winds…….
Valleys/lwr slopes…Northeast 6-12 mph becoming northwest in the afternoon.
Ridges/upr slopes….Northeast 6-12 mph with gusts to 20 mph.
LAL……………..1. CWR (>0.10 IN)……0 percent.

ANGELES NATIONAL FOREST (CAZ253):
.THURSDAY… Sky/weather………Mostly cloudy. Rain and snow showers.
Max temperature…..47-56 low elevations to 37-45 higher elevations.
24 hr trend……Little change. Min humidity……..60-80 percent. 24 hr trend……Up 20.
20-foot winds…….
Valleys/lwr slopes…East 8-15 mph with gusts to 25 mph.
Ridges/upr slopes….East 8-15 mph with gusts to 25 mph.
Marine layer……..None.
LAL……………..1. CWR (>0.10 IN)……60 percent.

.THURSDAY NIGHT… Sky/weather………Mostly cloudy. Chance of showers likely in the evening, then slight chance of showers.
Min temperature…..38-47 low elevations to 28-36 colder valleys and peaks.
Max humidity……..75-100 percent.
20-foot winds…….
Valleys/lwr slopes…Northeast 8-15 mph with gusts to 25 mph.
Ridges/upr slopes….Northeast 8-15 mph with gusts to 25 mph.
LAL……………..1. CWR (>0.10 IN)……20 percent.

.FRIDAY… Sky/weather………Mostly sunny.
Max temperature…..53-62 low elevations to 43-51 higher elevations.
Min humidity……..40-60 percent.
20-foot winds…….
Valleys/lwr slopes…Northeast 6-12 mph with gusts to 20 mph.
Ridges/upr slopes….Northeast 6-12 mph with gusts to 20 mph.
LAL……………..1. CWR (>0.10 IN)……0 percent.

ANTELOPE VALLEY (CAZ259):
.THURSDAY… Sky/weather………Cloudy. Showers likely.
Max temperature…..43-49. 24 hr trend……Down 5.
Min humidity……..70-80 percent. 24 hr trend……Up 32.
20-foot winds…….Northeast 6-12 mph. Gusts to 20 mph in the afternoon.
Marine layer……..None.
LAL……………..1. CWR (>0.10 IN)……30 percent.

.THURSDAY NIGHT… Sky/weather………Mostly cloudy. Chance of showers in the evening,then slight chance of showers.
Min temperature…..32-37.
Max humidity……..80-100 percent.
20-foot winds…….Northeast 6-12 mph with gusts to 20 mph early becoming 5-10 mph.
LAL……………..1. CWR (>0.10 IN)……20 percent.

.FRIDAY… Sky/weather………Partly cloudy then becoming mostly sunny.
Max temperature…..49-58.
Min humidity……..45-55 percent.
20-foot winds…….Northeast 5-10 mph.
LAL……………..1. CWR (>0.10 IN)……0 percent.

KERN CO. DESERTS (CAZ298):
THURSDAY… Sky/weather………Cloudy. Showers likely in the morning, then chance of showers in the afternoon.
Max Temperature…..45-50. 24 HR Trend……Down 2-4 degrees.
Min Humidity……..65-75 percent. 24 HR Trend……Up 29-35 percent.
20-Foot Winds…….Northeast 5-10 mph.
LAL……………..1.
Ventilation………Marginal.
Mixing height…….1700 ft AGL.
Transport Winds…..East 5 to 10 mph.
Chc Wetting Rain….30 percent.

.THURSDAY NIGHT… Sky/weather………Mostly cloudy. Chance of showers in the evening, then slight chance of showers after midnight.
Min Temperature…..34-39. 24 HR Trend……Down 1-3 degrees.
Max Humidity……..71-81 percent. 24 HR Trend……Down 2-4 percent.
20-Foot Winds…….North 4-8 mph.
LAL……………..1. Chc Wetting Rain….0 percent.

.FRIDAY… Sky/weather………Sunny.
Max Temperature…..52-57. 24 HR Trend……Up 6-8 degrees.
Min Humidity……..48-58 percent. 24 HR Trend……Down 15-19 percent.
20-Foot Winds…….North 4-8 mph.
LAL……………..1.
Ventilation………Fair.
Mixing height…….3600 ft AGL.
Transport Winds…..North 5 to 10 mph.
Chc Wetting Rain….0 percent.

La Jolla CA
Thursday
Showers and possibly a thunderstorm. High near 61. Southeast wind around 10 mph becoming south in the morning. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Thursday Night
Showers, mainly before 10pm. Low around 55. Calm wind becoming east around 5 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday
Mostly sunny, with a high near 64. Light and variable wind becoming west 5 to 10 mph in the afternoon.
Friday Night
Mostly clear, with a low around 54.

Poway CA
Thursday
Showers and possibly a thunderstorm. High near 61. Southeast wind 5 to 10 mph becoming southwest in the afternoon. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Thursday Night
Showers, mainly before 10pm. Low around 48. East wind around 5 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday
Mostly sunny, with a high near 66. Light and variable wind becoming west 5 to 10 mph in the afternoon.
Friday Night
Mostly clear, with a low around 46.

CEDAR CITY Ut.
DAYS TWO THROUGH SEVEN…Thursday through Tuesday

Increasing moisture ahead of a weakening Pacific storm system will spread precipitation, mainly as snow, across much of southern Utah Thursday and Friday. Accumulating snows will be on the light side in the valleys with the potential for several inches across the higher southern mountains.

Strong high pressure aloft will return to the outlook this weekend. This stable high pressure will strengthen valley inversions and lead to increasing valley fog and urban haze heading into early next week.

====================================================
THIS DAY IN WEATHER HISTORY:
2007: Surf with highest sets to 18 feet struck the coast of San Diego County (10 feet in Orange County) on 12/5 and on this day. Highway 101 in Cardiff was inundated with minor flooding. The Imperial Beach Pier sustained minor damage.

1998: A thunderstorm in Los Alamitos and Garden Grove produced wind gusts of 50 to 60 mph and was called “almost a tornado.”

1997: A stationary line of thunderstorms brought the heaviest rain in 70 years to portions of Orange County on this day through 12/8. Widespread four to eight inches of rainfall was recorded, with as much as ten inches in Mission Viejo. Over four inches fell in Corona. Heavy downpours were reported in Victor Valley. On this day Newport Beach and Laguna Beach reported respective rainfall totals of 6.00 and 5.50 inches, both all-time records for a single day by more than an inch. Widespread flooding resulted in Orange County, along with mud slides and coastal erosion. Flooding also occurred in Corona and several communities of Victor Valley, including a mud flow through Adelanto. In the days after the storm local beaches were littered with debris from the floods.

1992: A big storm that started on 12/4 and ended on 12/7 brought rainfall from 0.5 inch at the coast to up to six inches of precipitation in the mountains. 1.65 inches fell in Coronado, 1.60 in Vista, 1.42 in Fallbrook, 1.32 in Escondido, and 1.15 in San Diego. Flooding in Tijuana killed four and left hundreds homeless. Six inches to two feet of snow fell in the mountains. Local flooding, mud slides, standing water, and road closures resulted.

1989: It was 87° in Borrego Springs, the highest temperature on record for December. This also occurred the next two days on 12/7 and 12/8, and on 12/28/1980.

1966: Heavy rain drenched the region, especially the mountains, from 12/2 to 12/7. Storm totals for the period: 27.79 inches in Lake Arrowhead (believed to be a 100 year rainfall), 23.73 inches in Palomar Mountain, 18.72 inches in Big Bear Lake, 17.85 inches in Idyllwild, 9.14 inches in San Bernardino, 7.63 inches in Redlands, 6.21 inches in Santa Ana, 5.19 inches in Riverside, 2.99 inches in San Diego, 2.73 inches in Palm Springs, but only 0.66 inches in Victorville and 0.28 inches in Barstow! At least two homes were destroyed by floods and debris flows in Mill Creek Canyon. Debris flows and floods damaged homes and roads in Wrightwood and Lytle Creek. Homes and businesses were flooded in Redlands and Palm Springs. Many roads across the region were flooded and washed out. Scuba divers could not recover a Montclair man believed drowned in floodwaters. Strong storm winds caused power outages. On this day 9.43 inches of precipitation fell in Big Bear Lake, the greatest daily precipitation amount on record. Incredibly, only 0.07 inch fell in Victorville on this day.

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TROPICAL EAST PACIFIC REPORT:
For the eastern North Pacific…east of 140 degrees west longitude:

Tropical cyclone formation is not expected during the next 5 days.

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CURRENT WEATHER @ HESP. @ 0710 Hrs. TEMP: 400 RH: 94% WIND: CALM
0.95” RF @ HESP. STA.SINCE OCT. 1st/20 Yr Avg: 7.12” : MONTH:0.20 ” YTD S/F: 0.00” /
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FIRES: UPDATED

National Preparedness Level (PL 1)

CDF FIRES TO DATE (STATE LANDS SRA)

Southern California Area (PL 2 )
No Reportable Incidents

Northern California Area (PL 1 )
No Reportable Incidents

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