WEATHER 1/15/20

DAILY FIRE WEATHER & FIRE INFO
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: 1/15/20

SKYWARN: NORMAL
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.: 19

National Preparedness Level (PL 1 )

Southern California Area Preparedness Level: (PL 1 )

Northern California Area Preparedness Level (PL 1 )

GREEN = PL: 1 BLUE – PL:2 YELLOW = PL:3 ORANGE = PL:4 RED = PL: 5
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SYNOP: (NWS SAN DIEGO)
A trough of low pressure off the West Coast will maintain onshore flow and below average temperatures today. On late Thursday and Thursday night, a fast-moving low pressure system will bring stronger and gusty southwest to west winds to the mountains and deserts and chances for wetting precipitation from the coast to the mountains with greatest chances in the mountains. High pressure near the West Coast will bring drying on Friday and dry weather with a warming trend over the weekend. Slow cooling may begin to spread inland early next week as a trough of low pressure develops off the West Coast.

ꞏ Temperatures will be near to a little below normal through Wednesday, with 40s low 50s across the mountains and mid 50s to mid 60s in the valleys.

ꞏ Temperatures will cool around 5 degrees Thursday.

ꞏ South to west winds of 20 to 30 mph with gusts to 50 mph will surface across the mountain ridges and desert passes

Wednesday night through Thursday night.

ꞏ Showers will move from north to south across the area Thursday.

ꞏ Across Central California, most foothill and mountain locations will receive between 1 and 2 inches of rainfall and most coastal and valley locations will receive between a half inch and an inch of rainfall.

ꞏ Across Southern California, most foothill and mountain locations will receive between a half inch and an inch of rainfall and most coastal and valley locations will receive between a quarter inch and a half inch of rainfall from Los Angeles and San Bernardino Counties northward. In the far south, most locations will receive less than a quarter inch of rainfall, except there will be up to a half inch of rainfall over the Santa Ana Mountains.

ꞏ The snow level will be around 4,000 feet over Central California and around 5,000 feet over Southern California.

ꞏ A slow warming and drying trend will occur Friday through Monday.

ꞏ Winds will be light across the region Friday through Monday.

CONFIDENCE AND DETAILS
Mountain Snow and Lower Elevation Rainfall
Moderate Confidence

Snowfall accumulations mainly above 5000 feet. Light to moderate rain is expected below 5000 feet.

● What: Snow levels will be between 5000 and 5500 ft through midnight Thursday night, then lowering to as low as 4500 ft over the San Bernardino County mountains late Thursday night.

Snowfall amounts will average 3 to 7 inches (mainly above 6500 feet), with totals of 8 to 12 inches over the highest peaks of the San Bernardino Mountains. Rainfall totals in the lower elevations will range from 0.10 to 1.00 inch.

● Where: Highest snow totals in the San Bernardino County Mountains. Highest rainfall totals over Orange County.

● When: Thursday afternoon through early Friday morning.

Gusty Winds
Moderate Confidence

Gusty winds in the mountains and high deserts resulting in hazardous travel for high profile vehicles.
● What: Southwest winds 30-40 mph with isolated gusts 50-70 mph.
● Where: Mountains and High Deserts
● When: Thursday into

NWS LAS VEGAS SYNOP– (NORTH & EAST OF COUNTY)
A fast moving weather system will affect the region Thursday afternoon and Thursday night. Snow will largely be intercepted by the Sierra, but gusty winds and brief showers will spread across southern Nevada and northwest Arizona Thursday night leaving light snowfall in the mountains. Dry conditions return for
the weekend and will continue into next week.

SPECIAL NOTES:
BI-MONTHLY FUELS DISCUSSION
For Southern and Central California

Updated: Monday, January 13th, 2020
General Discussion:
The wet weather which began a few days prior to Thanksgiving continued through the first half of December.
Frequent storm systems pushed through the state bringing widespread wetting rains and high elevation snow.
The heaviest rain was focused on the central coast and across inland areas of Southern CA due to a pair of
storms which lingered off the coast. Curiously, the Sierras missed on the heaviest precipitation and snowpack
remains a bit below average according to the snow survey at the beginning of January.

Fuel moisture remains high enough to keep probabilities of ignition seasonally low and a new grass crop should allow lower elevations to remain in a low large fire potential status the next few weeks. But some areas with a high amount of dead fuel loading or a dense covering of ground litter may see some fire potential during peak heating hours, or during windy periods. These zones are generally from the 3,000 – 5,500 foot level. Upper elevations should see snowpack linger for a few more weeks.

Long range models were fairly accurate a few months ago in forecasting above normal precipitation to follow a
dry October and November last year. These same models have been consistently predicting below normalprecipitation the next few weeks. Although the weather in the short term does not appear especially warm or
windy, we may see spring grassfire season begin a few weeks early this year.

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

———————————————————————
APPLE VALLEY / HESPERIA-VICTOR VALLEY (CAZ260):
.TODAY… Sky/weather………Mostly sunny…becoming partly cloudy.
Max temperature…..55 to 61. 24 HR TREND……Down 6 degrees.
Min humidity……..25 to 30 percent. 24 HR TREND……Up 30 percent.
WIND (20 FT)……..Variable 2 to 4 mph becoming northeast around 6 mph in the afternoon.
CWR (>0.10 IN)……0 percent. LAL……………..1.

.TONIGHT… Sky/weather………Partly cloudy.
Min temperature…..32 to 38. 24 HR TREND……Up 1 degree.
Max humidity……..60 to 70 percent. 24 HR TREND……Little change.
WIND (20 FT)……..Winds east around 6 mph becoming south after midnight.
CWR (>0.10 IN)……0 percent. LAL……………..1.

.THURSDAY… Sky/weather………Partly cloudy.
Max temperature…..55 to 63. 24 HR TREND……Up 1 degree.
Min humidity……..15 to 25 percent. 24 HR TREND……Down 10 percent.
WIND (20 FT)……..Winds south 11 to 21 mph. Gusts to 30 mph…becoming 40 mph in the afternoon.
CWR (>0.10 IN)……2 percent. LAL……………..1.

*WRIGHTWOOD:
WINTER WEATHER ADVISORY IN EFFECT FROM 6 PM THURSDAY TO 2 AM PST FRIDAY ABOVE 5500 FEET
Wednesday
Sunny, with a high near 51. West wind around 5 mph becoming calm in the afternoon.
Wednesday Night
Partly cloudy, with a low around 36. Southwest wind 15 to 20 mph, with gusts as high as 35 mph.
Thursday
Snow, mainly after 4pm. High near 44. Windy, with a southwest wind 25 to 30 mph increasing to 30 to 35 mph in the afternoon. Winds could gust as high as 55 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.
Thursday Night
Snow. Low around 29. Windy, with a southwest wind 30 to 40 mph decreasing to 20 to 30 mph. Winds could gust as high as 55 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.

*BIG PINES / WEST WRIGHTWOOD AREA
Wednesday
Sunny, with a high near 53. Wind chill values as low as 30 early. West northwest wind around 10 mph becoming south in the morning.
Wednesday Night
Increasing clouds, with a low around 33. Wind chill values as low as 20. South wind 10 to 15 mph, with gusts as high as 25 mph.
Thursday
Snow, mainly after 10am. High near 42. Breezy, with a south southwest wind 20 to 25 mph, with gusts as high as 40 mph. Chance of precipitation is 80%. New snow accumulation of 2 to 4 inches possible.
Thursday Night
Snow, mainly before 10pm. Low around 29. Breezy. Chance of precipitation is 90%. New snow accumulation of 3 to 7 inches possible.

*PHELAN:
Wednesday
Sunny, with a high near 54. Light and variable wind becoming south 5 to 10 mph in the afternoon.
Wednesday Night
Partly cloudy, with a low around 37. Southeast wind 5 to 15 mph, with gusts as high as 25 mph.
Thursday
Rain, mainly after 4pm. High near 49. Breezy, with a southeast wind 15 to 25 mph, with gusts as high as 40 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Thursday Night
Rain, mainly before 10pm. Low around 33. Southeast wind 10 to 15 mph becoming southwest 5 to 10 mph after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible

TRONA (INDIAN WELLS) (CAZ298):
WEDNESDAY… Sky/weather………Sunny.
Max Temperature…..51-56. 24 HR Trend……Down 2-4 degrees.
Min Humidity……..28-38 percent. 24 HR Trend……Up 6-12 percent.
20-Foot Winds…….North 4 mph in the early morning shifting to the northeast by afternoon.
LAL……………..1.
Ventilation………Marginal. Mixing height…….2200 ft AGL. Transport Winds…..North around 5 mph in the morning shifting to the east in the afternoon.
Chc Wetting Rain….0 percent.

.WEDNESDAY NIGHT… Sky/weather………Clear.
Min Temperature…..30-35. 24 HR Trend……Little change.
Max Humidity……..71-81 percent. 24 HR Trend……Down 2-4 percent.
20-Foot Winds…….Southwest 6 mph.
LAL……………..1. Chc Wetting Rain….0 percent.

.THURSDAY… Sky/weather………Sunny. Chance of showers in the morning, then showers in the afternoon.
Max Temperature…..50-55. 24 HR Trend……Little change.
Min Humidity……..34-44 percent. 24 HR Trend……Up 3-5 percent.
20-Foot Winds…….Southwest 3-6 mph in the early morning increasing to south 11-17 mph by afternoon.
LAL……………..1.
Ventilation………Very good. Mixing height…….3500 ft AGL.
Transport Winds…..Southwest around 5 mph in the morning increasing to around 25 mph in the afternoon.
Chc Wetting Rain….0 percent.

BARSTOW / DAGGETT / BAKER / FT. IRWIN (CAZ228):
TODAY… * Sky/Weather………Mostly sunny.
* Max temperature: * Valley floor….61-66. * 24 hr trend…..On average down 2 degrees.
* Min humidity:
* Valley floor….21-29 percent. * 24 hr trend…..On average up 2 percent.
* Wind (Slope/valley=20 ft, 10 min avg):
* Valley floor….Upslope/upvalley 4 to 8 mph.
* 10000 ft msl….West 20 to 30 mph becoming southwest 15 to 25 mph in the afternoon.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1. * Haines Index……..5.

.TONIGHT… * Sky/Weather………Partly cloudy.
* Min temperature: * Valley floor….33-38. * 24 hr trend…..On average up 3 degrees.
* Max humidity: * Valley floor….56-61 percent. * 24 hr trend…..On average down 9 percent.
* Wind (Slope/valley=20 ft, 10 min avg):
* Valley floor….Downslope/downvalley 2 to 5 mph.
* 10000 ft msl….Southwest 15 to 25 mph increasing to 20 to 30 mph after midnight.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1. * Haines Index……..6.

.THURSDAY… * Sky/Weather………Mostly sunny. Scattered rain in the evening.
* Max temperature: * Valley floor….63-68. * 24 hr trend…..On average up 2 degrees.
* Min humidity: * Valley floor….18-28 percent. * 24 hr trend…..On average down 2 percent.
* Wind (Slope/valley=20 ft, 10 min avg):
* Valley floor….South wind up to 10 mph with gusts to around 25 mph increasing to 10 to 20 mph with gusts to around 40 mph in the afternoon.
* 10000 ft msl….Southwest 25 to 35 mph increasing to 35 to 45 mph in the afternoon.
* CWR (>= 0.10 in)….0 percent increasing to 20 percent in the evening.
* LAL……………..1. * Haines Index……..5.

*BAKER:
Wednesday
Increasing clouds, with a high near 62. Calm wind.
Wednesday Night
Partly cloudy, with a low around 34. Calm wind.
Thursday
A 30 percent chance of rain after 4pm. Sunny, with a high near 65. Light southeast wind becoming south 6 to 11 mph in the morning. Winds could gust as high as 22 mph.
Thursday Night
A 30 percent chance of rain, mainly before 10pm. Partly cloudy, with a low around 36. Southwest wind 7 to 11 mph, with gusts as high as 23 mph.

SOUTHERN OWENS VALLEY / EAST SIERRA FOOTHILLS (CAZ226):
WIND ADVISORY IN EFFECT FROM 10 AM TO 9 PM PST THURSDAY
TODAY… * Sky/Weather………Mostly sunny.
* Max temperature: * Valley floor….53-58. * 7000 feet…….44-49. * 24 hr trend…..Little change.
* Min humidity: * Valley floor….19-29 percent. * 7000 feet…….24-34 percent.
* 24 hr trend…..On average up 2 percent.
* Wind (slope/valley=20 ft, 10 min avg):
* Slope/valley….Upslope/upvalley 4 to 8 mph becoming southeast around 10 mph in the afternoon.
* Upper slopes….Southwest winds 10 to 15 mph. Gusts up to 30 mph in the afternoon.
* 10000 ft msl….Southwest 10 to 15 mph.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1. * Haines Index……..4.

.TONIGHT… * Sky/Weather………Partly cloudy.
* Min temperature: * Valley floor….28-33. * 7000 feet…….12-17. * 24 hr trend…..On average up 2 degrees.
* Max humidity: * Valley floor….58-63 percent. * 7000 feet…47-52 percent. * 24 hr trend…On average up 9 percent.
* Wind (slope/valley=20 ft, 10 min avg):
* Slope/valley….South winds 10 to 15 mph.
* Upper slopes….Southwest winds 10 to 20 mph with gusts to around 40 mph.
* 10000 ft msl….Southwest 10 to 15 mph increasing to 15 to 25 mph after midnight.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1. * Haines Index……..5.

.THURSDAY… * Sky/Weather………Mostly sunny then increasing clouds in the afternoon and evening with snow in the Sierra and scattered rain and snow in the Owens Valley Thursday evening.
* Max temperature: * Valley floor….53-58. * 7000 feet…….41-46. * 24 hr trend…..Little change.
* Min humidity: * Valley floor….21-31 percent. * 7000 feet…….25-35 percent. * 24 hr trend…..Little change.
* Wind (slope/valley=20 ft, 10 min avg):
* Slope/valley….South winds 10 to 15 mph with gusts to around 35 mph increasing to 15 to 25 mph with gusts to around 45 mph in the afternoon.
* Upper slopes….Windy. Southwest winds 20 to 30 mph with gusts to around 55 mph.
* 10000 ft msl….Southwest 20 to 30 mph increasing to 25 to 35 mph in the afternoon.
* CWR (>= 0.10 in)….55 percent increasing to 100 percent in the afternoon.
* LAL……………..1. * Haines Index……..5.

KERN CO. DESERTS (CAZ299):
.WEDNESDAY… Sky/weather………Sunny.
Max Temperature…..51-56. 24 HR Trend……Down 1-3 degrees.
Min Humidity……..28-38 percent. 24 HR Trend……Little change.
20-Foot Winds…….East 6 mph.
LAL……………..1. Ventilation………Marginal.
Mixing height…….2200 ft AGL. Transport Winds…..Northeast around 5 mph.
Chc Wetting Rain….0 percent.

.WEDNESDAY NIGHT… Sky/weather………Clear.
Min Temperature…..30-35. 24 HR Trend……Little change.
Max Humidity……..67-77 percent. 24 HR Trend……Down 2-4 percent.
20-Foot Winds…….North 5 mph in the early evening shifting to the west 6 mph.
LAL……………..1. Chc Wetting Rain….0 percent.

.THURSDAY… Sky/weather………Sunny. Chance of showers in the morning. Showers in the afternoon.
Max Temperature…..49-54. 24 HR Trend……Down 1-3 degrees.
Min Humidity……..38-48 percent. 24 HR Trend……Up 9-19 percent.
20-Foot Winds…….Southwest 3-8 mph in the early morning increasing to 6-18 mph by afternoon.
LAL……………..1.
Ventilation………Very good. Mixing height…….3600 ft AGL.
Transport Winds…..Southwest around 5 mph in the morning increasing to around 25 mph in the afternoon.
Chc Wetting Rain….0 percent.

INLAND EMPIRE (CAZ248):
.TODAY… Sky/weather………Mostly sunny…becoming partly cloudy.
Max temperature…..64 to 69. 24 HR TREND……Up 6 degrees.
Min humidity……..25 to 30 percent. 24 HR TREND……Up 30 percent.
WIND (20 FT)……..Variable 1 to 3 mph.
CWR (>0.10 IN)……0 percent. LAL……………..1.

.TONIGHT… Sky/weather………Partly cloudy.
Min temperature…..38 to 44. 24 HR TREND……Little change.
Max humidity……..75 to 85 percent. 24 HR TREND……Down 10 percent.
WIND (20 FT)……..Variable 1 to 3 mph.
CWR (>0.10 IN)……0 percent. LAL……………..1.

.THURSDAY… Sky/weather………Mostly cloudy. Patchy fog in the morning. Slight chance of rain in the afternoon.
Max temperature…..55 to 60. 24 HR TREND……Down 9 degrees.
Min humidity……..45 to 55 percent. 24 HR TREND……Up 30 percent.
WIND (20 FT)……..Winds southwest 6 to 11 mph with gusts to 25 mph.
CWR (>0.10 IN)……13 percent. LAL……………..1.

*DEVORE:
Wednesday
Sunny, with a high near 65. North wind around 5 mph becoming south in the afternoon.
Wednesday Night
Patchy fog after 10pm. Otherwise, partly cloudy, with a low around 39. Northeast wind around 5 mph becoming calm.
Thursday
Rain, mainly after 4pm. The rain could be heavy at times. Patchy fog before 10am. High near 55. East wind 5 to 10 mph becoming southwest 10 to 15 mph in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday Night
Rain. The rain could be heavy at times. Low around 44. South wind 10 to 15 mph becoming northeast 5 to 10 mph after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

*CHINO HILLS:
Wednesday
Sunny, with a high near 63. Northeast wind around 5 mph becoming southwest in the afternoon.
Wednesday Night
Partly cloudy, with a low around 42. South wind 5 to 10 mph.
Thursday
Rain, mainly after 4pm. High near 56. East wind 5 to 15 mph becoming southwest in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday Night
Rain. Low around 42. Southwest wind 10 to 15 mph decreasing to 5 to 10 mph after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

*COLTON:
Wednesday
Sunny, with a high near 67. Calm wind becoming west around 5 mph.
Wednesday Night
Partly cloudy, with a low around 43. South wind around 5 mph becoming calm.
Thursday
Rain, mainly after 4pm. High near 60. Southeast wind 5 to 10 mph becoming southwest in the afternoon. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Thursday Night
Rain. Low around 43. South wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible

SAN BERNARDINO N.F. (CAZ255):
WINTER WEATHER ADVISORY IN EFFECT FROM 6 PM THURSDAY TO 2 AM PST FRIDAY ABOVE 5500 FEET
.TODAY… Sky/weather………Mostly sunny…becoming partly cloudy.
Max temperature…..47 to 57 above 6000 feet to 51 to 61 below 6000 feet. 24 HR TREND……Down 2 degrees.
Min humidity…15 to 25 percent on desert slopes to 20 to 30 percent on coastal slopes. 24 HR TREND..Up 20 percent.
WIND (20 FT)……..
SLOPES………..Upslope 2 to 4 mph becoming south around 6 mph in the afternoon.
RIDGETOP………Winds southwest 6 to 11 mph with gusts to 25 mph.
CWR (>0.10 IN)……0 percent. LAL……………..1.

.TONIGHT… Sky/weather………Partly cloudy.
Min temperature…..26 to 36 above 6000 feet to 34 to 41 below 6000 feet. 24 HR TREND……Up 2 degrees.
Max humidity…25 to 35 percent on desert slopes to 40 to 50 percent on coastal slopes. 24 HR TREND…Down 5 percent.
WIND (20 FT)……..
SLOPES………..Winds south 6 to 12 mph with gusts to 25 mph.
RIDGETOP………Winds southwest 6 to 16 mph with gusts to 30 mph.
CWR (>0.10 IN)……0 percent. LAL……………..1.

.THURSDAY… Sky/weather………Partly cloudy…becoming cloudy. Patchy fog in the afternoon. Slight chance of rain and snow in the afternoon.
Max temperature…..39 to 49 above 6000 feet to 44 to 53 below 6000 feet. 24 HR TREND……Little change.
Min humidity…15 to 20 percent on desert slopes to 20 to 30 percent on coastal slopes. 24 HR TREND…Little change.
WIND (20 FT)……..
SLOPES………..Winds southwest 11 to 21 mph with gusts to 40 mph.
RIDGETOP………Winds southwest 17 to 27 mph. Gusts to 40 mph…becoming 50 mph in the afternoon.
CWR (>0.10 IN)……9 percent. LAL……………..1.

*LAKE ARROWHEAD SCHOOL- AREA:
WINTER WEATHER ADVISORY IN EFFECT FROM 6 PM THURSDAY TO 2 AM PST FRIDAY ABOVE 5500 FEET
Wednesday
Sunny, with a high near 51. South wind 5 to 10 mph.
Wednesday Night
Partly cloudy, with a low around 33. South wind 10 to 15 mph, with gusts as high as 25 mph.
Thursday
A chance of snow before 4pm, then rain and snow. The rain and snow could be heavy at times. Patchy fog after 10am. High near 41. Breezy, with a south wind 15 to 25 mph, with gusts as high as 40 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.
Thursday Night
Rain and snow, becoming all snow after 10pm. The rain and snow could be heavy at times. Patchy fog before 10pm. Low around 29. Windy, with a south wind 25 to 30 mph decreasing to 15 to 20 mph after midnight. Winds could gust as high as 45 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.

*BIG BEAR SCHOOL AREA:
WINTER WEATHER ADVISORY IN EFFECT FROM 6 PM THURSDAY TO 2 AM PST FRIDAY ABOVE 5500 FEET
Wednesday
Sunny, with a high near 51. Southwest wind around 10 mph, with gusts as high as 20 mph.
Wednesday Night
Partly cloudy, with a low around 28. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Thursday
A slight chance of snow after 10am. Patchy fog after 10am. Otherwise, partly sunny, with a high near 43. Windy, with a southwest wind 15 to 20 mph increasing to 25 to 30 mph in the afternoon. Winds could gust as high as 50 mph. Chance of precipitation is 20%.
Thursday Night
Snow likely. Patchy fog before 10pm. Otherwise, mostly cloudy, with a low around 23. Windy, with a southwest wind 35 to 40 mph decreasing to 25 to 30 mph after midnight. Winds could gust as high as 55 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 3 inches possible.

BANNING PASS (CAZ265):
.TODAY… Sky/weather………Mostly sunny…becoming partly cloudy.
Max temperature…..65 to 70. 24 HR TREND……Little change.
Min humidity……..25 percent. 24 HR TREND……Up 25 percent.
WIND (20 FT)……..Variable 1 to 3 mph.
CWR (>0.10 IN)……0 percent. LAL……………..1.

.TONIGHT… Sky/weather………Partly cloudy.
Min temperature…..43 to 50. 24 HR TREND……Up 2 degrees.
Max humidity……..45 to 55 percent. 24 HR TREND……Down 5 percent.
WIND (20 FT)……..Variable 1 to 3 mph.
CWR (>0.10 IN)……0 percent. LAL……………..1.

.THURSDAY… Sky/weather………Partly cloudy.
Max temperature…..64 to 69. 24 HR TREND……Down 1 degree.
Min humidity……..25 to 30 percent. 24 HR TREND……Up 5 percent.
WIND (20 FT)……..Variable 3 to 7 mph becoming west 7 to 17 mph with gusts to 35 mph in the afternoon.
CWR (>0.10 IN)……0 percent. LAL……………..1.

JOSHUA TREE AREA (CAZ230):
TODAY… * Sky/weather…………………Mostly sunny.
* Max Temperature……………..53-64. * 24 hr trend………………Little change.
* Min Humidity………………..25-33 pct. * 24 hr trend………………Little change.
* Winds – 20 foot…Slope/Valley..Northwest 5 to 10 mph in the morning becoming east in the afternoon.
* Winds…10000 FT MSL…………West 20 to 30 mph.
* Chance of Precip…………….0 percent. * CWR (>= 0.10 IN)…………….0 percent. * LAL………………………..1.
* Haines High Level Index………5 moderate potential for large plume dominated fire growth.

.TONIGHT… * Sky/weather…………………Mostly cloudy in the evening becoming partly cloudy after midnight.
* Min Temperature……………..37-44. * 24 hr trend………………3 degrees warmer.
* Max Humidity………………..43-60 pct. * 24 hr trend………………6 pct drier.
* Winds – 20 foot…Slope/Valley..Southwest 5 to 15 mph.
* Winds…10000 FT MSL…………Southwest 20 to 30 mph.
* Chance of Precip…………….0 percent. * CWR (>= 0.10 IN)…………….0 percent. * LAL………………………..1.

.THURSDAY… * Sky/weather…………………Mostly sunny.
* Max Temperature……………..54-67. * 24 hr trend………………Little change.
* Min Humidity………………..22-33 pct. * 24 hr trend………………Little RH change.
* Winds – 20 foot…Slope/Valley..Southwest 5 to 15 mph.
* Winds…10000 FT MSL…………Southwest 25 to 35 mph.
* Chance of Precip…………….0 percent. * CWR (>= 0.10 IN)…………….0 percent. * LAL………………………..1.
* Haines High Level Index………5 moderate potential for large plume dominated fire growth.

NEEDLES, RIVER BAT. (CAZ229):
.TODAY… * Sky/Weather………Mostly sunny.
* Max temperature: * Valley floor….65-70. * 24 hr trend…..Little change.
* Min humidity: * Valley floor….22-32 percent. * 24 hr trend…..Little change.
* Wind (Slope/valley=20 ft, 10 min avg):
* Valley floor….Upslope/upvalley 4 to 8 mph.
* 10000 ft msl….West 20 to 30 mph becoming southwest 15 to 25 mph in the afternoon.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1. * Haines Index……..5.
* Mixing height…….2900 ft agl. * Transport winds…..Light winds. * Ventilation………Marginal.

.TONIGHT… * Sky/Weather………Mostly cloudy.
* Min temperature: * Valley floor….38-43. * 24 hr trend…..On average up 4 degrees.
* Max humidity: * Valley floor….54-59 percent. * 24 hr trend…..On average down 9 percent.
* Wind (Slope/valley=20 ft, 10 min avg):
* Valley floor….Downslope/downvalley 2 to 5 mph.
* 10000 ft msl….Southwest 20 to 30 mph increasing to 25 to 35 mph after midnight.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1. * Haines Index……..6.

.THURSDAY… * Sky/Weather………Mostly sunny.
* Max temperature: * Valley floor….65-70. * 24 hr trend…..Little change.
* Min humidity: * Valley floor….21-31 percent. * 24 hr trend…..Little change.
* Wind (Slope/valley=20 ft, 10 min avg):
* Valley floor….Upslope/upvalley 4 to 8 mph becoming south 10 to 15 mph with gusts to 25 mph in the afternoon.
* 10000 ft msl….Southwest 25 to 35 mph increasing to 35 to 45 mph in the afternoon.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1. * Haines Index……..5.
* Mixing height…….3600 ft agl.
* Transport winds…..Light winds becoming south 10 to 20 knots in the afternoon.
* Ventilation………Good.

STATELINE – CLARK COUNTY BORDER (NVZ465):
TODAY… * Sky/Weather………Mostly sunny.
* Max temperature: * 4000 feet…….57-62. * 24 hr trend…..Little change.
* Min humidity: * 4000 feet…….24-32 percent. * 24 hr trend…..Little change.
* Wind (slope/valley=20 ft, 10 min avg):
* Slope/valley….Upslope/upvalley 4 to 8 mph.
* 10000 ft msl….Southwest 15 to 25 mph.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1. * Haines Index……..5.
* Mixing height…….2500 ft agl. * Transport winds…..Light winds. * Ventilation………Poor.

.TONIGHT… * Sky/Weather………Partly cloudy.
* Min temperature: * 4000 feet…….31-36. * 24 hr trend…..On average up 6 degrees.
* Max humidity: * 4000 feet…….60-65 percent. * 24 hr trend…..On average down 10 percent.
* Wind (slope/valley=20 ft, 10 min avg):
* Slope/valley….Downslope/downvalley 2 to 5 mph.
* 10000 ft msl….Southwest 20 to 30 mph increasing to 25 to 35 mph after midnight.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1. * Haines Index……..5.

.THURSDAY… * Sky/Weather………Mostly sunny.
* Max temperature: * 4000 feet…….60-65. * 24 hr trend…..On average up 3 degrees.
* Min humidity: * 4000 feet…….20-29 percent. * 24 hr trend…..On average down 3 percent.
* Wind (slope/valley=20 ft, 10 min avg):
* Slope/valley….Upslope/upvalley 4 to 8 mph becoming south 10 to 15 mph with gusts to around 30 mph in the afternoon.
* 10000 ft msl….Southwest 30 to 40 mph increasing to 40 to 50 mph in the afternoon.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1. * Haines Index……..5.
* Mixing height…….2500 ft agl.
* Transport winds…..Light winds becoming south 15 to 20 knots in the afternoon.
* Ventilation………Good.

*La Jolla CA
Wednesday
Mostly sunny, with a high near 59. Calm wind becoming west around 5 mph in the afternoon.
Wednesday Night
Mostly cloudy, with a low around 49. South wind around 5 mph.
Thursday
A chance of rain after 10am. Mostly cloudy, with a high near 58. Southwest wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Thursday Night
Rain likely, mainly after 10pm. Mostly cloudy, with a low around 51. South wind 10 to 15 mph becoming northwest after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

*Poway CA
Wednesday
Sunny, with a high near 66. Calm wind becoming west around 5 mph in the afternoon.
Wednesday Night
Mostly cloudy, with a low around 45. Calm wind becoming southeast around 5 mph after midnight.
Thursday
A chance of rain after 10am. Mostly cloudy, with a high near 60. Southeast wind around 10 mph becoming southwest in the afternoon. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Thursday Night
Rain likely, mainly after 10pm. Mostly cloudy, with a low around 47. South wind 5 to 10 mph becoming northwest after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

*CEDAR CITY Ut.
DAYS TWO THROUGH SEVEN…Wednesday through Monday

A stronger storm system will impact the state Thursday night into Friday. Strong gusty southerly winds across the mountains and in western Utah on Thursday will precede the cold front which will bring widespread snow to the area Thursday night into Friday.

Wednesday
Sunny, with a high near 46. Light south southwest wind becoming west southwest 5 to 9 mph in the afternoon.
Wednesday Night
Partly cloudy, with a low around 31. South wind 10 to 13 mph.
Thursday
Mostly sunny, with a high near 52. Breezy, with a south southwest wind 11 to 16 mph increasing to 20 to 25 mph in the morning.
Thursday Night
Snow likely after 11pm. Mostly cloudy, with a low around 27. South wind 16 to 21 mph. Chance of precipitation is 60%. New snow accumulation of 1 to 2 inches possible.

*************************** L.A COUNTY ********************************
VERY DRY MOUNTAIN CONDITIONS THROUGH EARLY THURSDAY.
STORM SYSTEM WITH MODERATE RAIN AND MOUNTAIN SNOW ON THURSDAY

LOS ANGELS CO. SAN GABRIEL VALLEY (CAZ548):
.WEDNESDAY… Sky/weather………Mostly sunny then becoming partly cloudy.
Max temperature…..60-67. 24 hr trend……Up 3.
Min humidity……..50-60 percent beaches to 25-40 percent inland. 24 hr trend……Down 19.
20-foot winds…….North 5-10 mph becoming southwest 6-12 mph in the afternoon.
Marine layer……..1000 ft asl. LAL……………..1. CWR (>0.10 IN)……0 percent.

.WEDNESDAY NIGHT… Sky/weather………Partly cloudy then becoming mostly cloudy.
Min temperature…..38-48.
Max humidity……..75-100 percent.
20-foot winds…….Variable 3-8 mph.
LAL……………..1. CWR (>0.10 IN)……0 percent.

.THURSDAY… Sky/weather………Mostly cloudy. Slight chance of rain, then rain likely in the afternoon.
Max temperature…..54-60.
Min humidity……..55-75 percent.
20-foot winds…….Southeast 6-12 mph becoming south 8-15 mph with gusts to 25 mph in the afternoon.
LAL……………..1. CWR (>0.10 IN)……50 percent.

ANGELES NATIONAL FOREST (CAZ254):
.WEDNESDAY… Sky/weather………Mostly sunny then becoming partly cloudy.
Max temperature…..57-65 low elevations to 48-55 higher elevations. 24 hr trend……Up 3.
Min humidity……..5-15 percent. 24 hr trend……Down 5-10.
20-foot winds…….
Valleys/lwr slopes…North to northeast 8-15 mph with gusts to 25 mph.
Ridges/upr slopes….Northwest 8-15 mph with gusts to 25 mph becoming southwest 6-12 mph with gusts to 20 mph in the afternoon.
Marine layer……..None. LAL……………..1. CWR (>0.10 IN)……0 percent.

.WEDNESDAY NIGHT… Sky/weather………Mostly clear then becoming mostly cloudy.
Min temperature…..37-44 low elevations to 29-35 colder valleys and peaks.
Max humidity……..20-40 percent except 65-80 percent colder valleys.
20-foot winds…….
Valleys/lwr slopes…Southeast 6-12 mph with gusts to 20 mph becoming south 8-15 mph with gusts to 25 mph after midnight.
Ridges/upr slopes….Southwest 8-15 mph with gusts to 25 mph becoming 15-25 mph with gusts to 35 mph after midnight.
LAL……………..1. CWR (>0.10 IN)……0 percent.

.THURSDAY… Sky/weather………Mostly cloudy. Slight chance of rain and snow, then rain and snow likely in the afternoon.
Max temperature…..48-55 low elevations to 39-46 higher elevations.
Min humidity……..45-60 percent except 15-25 percent higher peaks. Occurring early.
20-foot winds…….
Valleys/lwr slopes…South 8-15 mph with gusts to 25 mph becoming 15-25 mph with gusts to 35 mph in the afternoon.
Ridges/upr slopes….Southwest 20-30 mph with gusts to 50 mph.
LAL……………..1. CWR (>0.10 IN)……60 percent.

ANTELOPE VALLEY (CAZ259):
.WEDNESDAY… Sky/weather………Mostly sunny.
Max temperature…..49-58. 24 hr trend……Little change.
Min humidity……..10-20 percent. 24 hr trend……Little change.
20-foot winds…….Variable 3-8 mph becoming northeast 6-12 mph by the afternoon.
Marine layer……..None. LAL……………..1. CWR (>0.10 IN)……0 percent.

.WEDNESDAY NIGHT… Sky/weather………Mostly clear then becoming partly cloudy.
Min temperature…..30-37.
Max humidity……..60-75 percent except 35-45 percent in the hills.
20-foot winds…….East 6-12 mph becoming southwest 6-12 mph after midnight.
LAL……………..1. CWR (>0.10 IN)……0 percent.

.THURSDAY… Sky/weather………Mostly cloudy. Rain likely in the afternoon.
Max temperature…..45-55.
Min humidity……..25-40 percent except 40-50 percent in the hills.
20-foot winds…….Southwest 6-12 mph with gusts to 20 mph becoming 20-30 mph with gusts to 45 mph in the afternoon.
LAL……………..1. CWR (>0.10 IN)……30 percent.
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THIS DAY IN WEATHER HISTORY:
1997: A storm that began on 1/12 and ended on this day brought 18 inches of snowfall to Mt. Laguna. Generally 18 inches to three feet of snow was reported above 2500 feet. The ski resort at Snow Valley remained open until 5/18, the latest in its 78 year history. 13 illegal immigrants died from exposure near Pine Valley.

1993: A very wet series of storms that began on 1/6 and ended on 1/19 produced 20 to 50 inches of precipitation in the mountains and up to 12 inches at lower elevations over a two week period. It was one of the longest periods of consecutive days of precipitation on record (14) and measurable rain fell nearly every day from 1/2 to 1/19. Flooding and flash flooding, mud slides, etc., resulted. On this day through 1/17, heavy flooding occurred on the Santa Margarita and San Luis Rey Rivers. Highway 76 was washed out near I-15. The airports at Camp Pendleton and Oceanside sustained flood damage. In Tijuana, homes and streets were flooded along the Tijuana River. Five died and 139 people were caught in floodwaters, 600 were evacuated.
1978: Starting on 1/14 and ending on this day, 2.65 inches of precipitation fell in San Diego, the greatest 24-hour total on record for January.

1952: A series of storms brought heavy rain and mountain snow to the region starting on 1/13 and ending on 1/18. 5.52 inches fell in San Bernardino over the six days. Flooding was reported in Upland and Ontario. Heavy snow hit the San Bernardino Mountains with 40 inches in Lake Arrowhead (with a snow depth of 46 inches), and 37 inches in Big Bear Lake. All mountain roads were blocked and closed because of snow slides.

1949: For the first time in 6 days Palomar Mountain failed to record snowfall. Snowfall from the prior 6 days totaled 74 inches. This is by far the snowiest period at Palomar Mountain since records began in 1901. The next largest six-day total was 48 inches in 1991. Lake Arrowhead recorded 48 inches over six days.

1932: Up to two inches of snow fell all over the LA Basin. One inch was recorded at the LA Civic Center and even the beaches of Santa Monica were whitened. 18 inches fell in Julian, 17 inches at Mt. Laguna, 14 inches at Cuyamaca, and six inches at Descanso.

1916: Widespread heavy rains hit Southern California starting on 1/14 and ending on 1/21. 8.5 inches fell during this period in San Bernardino. 16.71 inches fell in 24 hours at Squirrel Inn (near Lake Arrowhead) on 1/16 and on 1/17, a record 24 hour rainfall for California until 1943. More than nine inches fell in two storms in the Coachella Valley. Previous storms had deposited deep snow in the mountains, adding to the runoff. Widespread flooding resulted and at least 22 died. Roofs in Chula Vista, poultry farm in Vista, boats in Coronado and Newport were damaged. Most cities were completely inundated. Pine trees from Palomar Mountain floated down the San Luis Rey River through Oceanside. The cities of Indio, Coachella and Mecca were underwater. Ontario and Redlands were isolated and roads, railroads and bridges were washed out.

1911: Very cold weather descended on the region sending overnight lows off a cliff. The all-time lowest temperature on record was recorded in Riverside with a morning low of 18°.
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TROPICAL EAST PACIFIC REPORT:

Routine issuance of the Tropical Weather Outlook will resume on May 15, 2020. During the off-season, Special Tropical Weather Outlooks will be issued as conditions warrant.

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CURRENT WEATHER @ HESP. @ 0740 Hrs. TEMP: 320 RH: 90% WIND: W 4 G 10
3.21” RF @ HESP. STA.SINCE OCT. 1st/20 Yr Avg: 7.12” : MONTH: 0.00” YTD S/F: 4.50” /
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FIRES: UPDATED

National Preparedness Level (PL 1 )

CDF FIRES TO DATE (STATE LANDS SRA)

Southern California Area (PL 1 )
No Reportable Incidents

Northern California Area (PL 1 )
No Reportable Incidents

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