WEATHER 2/19/20

DAILY FIRE WEATHER & FIRE INFO
ALL UNITS From:
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Date: 2/19/20

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.: 54

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
==============================================================================
SOUTH OPS WX:
A weak ridge of high pressure will be in control of the weather across California through Friday. A weak area of low pressure that will develop off the California Coast Thursday will move inland across Southern California Saturday morning. This low pressure will move quickly eastward Saturday afternoon and Saturday night. A ridge of high pressure will build into California from the Pacific Ocean Sunday through early next week.

ꞏ There will be little change in the weather through Friday.

ꞏ Maximum temperatures will remain around 5 degrees above normal, with 50s to low 60s across the mountains and mid 60s to mid 70s in the valleys.

ꞏ Minimum humidity will remain mainly between 15% and 30%.

ꞏ Winds will remain light.

ꞏ Scattered showers with less than a quarter inch of rainfall will move across the region Friday evening through Saturday afternoon.

ꞏ Most of the rainfall is expected to occur Saturday morning.

ꞏ The snow level will be around 5,000 feet.

ꞏ Significant cooling will occur Saturday and temperatures will be around 10 degrees below normal.

ꞏ Westerly winds of 20 to 30 mph with gusts to 50 mph will surface across the mountain ridges and desert passes Saturday afternoon through Saturday evening.

ꞏ A warming and drying trend will occur Sunday through early next week.

ꞏ Temperatures will warm back up to around 5 degrees above normal by early next week.
ꞏ Winds will be light Sunday through early next week.

SYNOP: (NWS SAN DIEGO)
A weak trough of low pressure moving inland through California has brought stronger onshore flow and deepening of the marine layer early this morning. The flow will go weakly offshore for Thursday
into Friday morning with gusty east winds to 30 mph near the coastal slopes of the mountains and lower inland humidity. A low pressure system moving inland through southern California will bring some mostly light precipitation for Friday night into Saturday. Dry weather will then follow into the middle of next week with periods of gusty northeast winds possible early next week with lower confidence in the strength and timing of those winds.

NWS LAS VEGAS SYNOP– (NORTH & EAST OF COUNTY)
Afternoon RH values are expected to continue to fall into the teens for the desert valleys through the rest of the week but winds are expected to stay below critical thresholds due to benign weather over the next few days. On Saturday, widespread wetting rainfall is expected to bring at least a few hundredths to many locations across the southern Great Basin. After Saturday, a return to dry conditions is expected.

KEY POINTS
Rain chances increase beginning late Friday night through Saturday.
Significant snowfall possible for Spring Mountains above 8000 ft.

CONFIDENCE AND DETAILS
Rain/Snow Chances Saturday
HIGH Confidence Hazardous travel conditions due to slick roadways.

MODERATE Confidence Minor roadway ponding, with flowing water in sensitive drainages.
LOW Confidence
Moderate to heavy rain leading to minor nuisance flooding.
Water flowing in normally dry washes, flood channels, and low water crossings.
Travel delays at McCarran International Airport due to low clouds and rain.

Details:
Clark/Mohave/Eastern Mojave Desert/Colorado River Valley
Moderate to occasional heavy rainfall possible from Pahrump/Baker areas and east Saturday morning into the early afternoon.

Between 0.25″ – 0.75″ of rainfall possible in these areas.

Inyo/Esmeralda/Nye/Lincoln
Generally light rain/snow possible with minimal impacts expected.
Generally below 0.10″ of precipitation expected.

Spring Mountains
3-6 inches of snowfall possible between 7-8k feet; 8-12 inches possible above 8000 ft.
Snow onset would be pre-dawn hours Saturday morning, lasting through Saturday evening.

SPECIAL NOTES:

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.
Max temperature…..64 to 71. 24 HR TREND……Up 1 degree.
Min humidity……..15 percent. 24 HR TREND……Up 5 percent.
WIND (20 FT)……..Winds west around 6 mph becoming north in the afternoon.
CWR (>0.10 IN)……0 percent. LAL……………..1.

.TONIGHT… Sky/weather………Mostly clear.
Min temperature…..35 to 43. 24 HR TREND……Up 1 degree.
Max humidity……..35 to 45 percent. 24 HR TREND……Down 15 percent.
WIND (20 FT)……..Winds east6 mph.
CWR (>0.10 IN)……0 percent. LAL……………..1.

.THURSDAY… Sky/weather………Mostly sunny.
Max temperature…..Around 62. 24 HR TREND……Up 3 degrees.
Min humidity……..10 to 15 percent. 24 HR TREND……Little change.
WIND (20 FT)……..Winds east 6 to 10 mph with gusts to 20 mph.
CWR (>0.10 IN)……0 percent. LAL……………..1.

*WRIGHTWOOD:
Wednesday
Sunny, with a high near 53. West wind 5 to 10 mph.
Wednesday Night
Clear, with a low around 36. Calm wind becoming east around 5 mph.
Thursday
Sunny, with a high near 55. Southeast wind around 5 mph.
Thursday Night
Mostly clear, with a low around 38. South wind 5 to 15 mph, with gusts as high as 20 mph.

*BIG PINES / WEST WRIGHTWOOD AREA
Wednesday
Sunny, with a high near 54. Wind chill values as low as 25 early. Southwest wind 5 to 10 mph becoming north in the morning.
Wednesday Night
Clear, with a low around 33. West southwest wind around 5 mph becoming east southeast in the evening.
Thursday
Sunny, with a high near 55. East southeast wind around 5 mph becoming west southwest in the morning.
Thursday Night
Mostly clear, with a low around 42.

*PHELAN:
Wednesday
Sunny, with a high near 62. North wind around 5 mph.
Wednesday Night
Clear, with a low around 42. Calm wind becoming southwest around 5 mph.
Thursday
Sunny, with a high near 63. Northwest wind around 5 mph becoming southeast in the afternoon.
Thursday Night
Mostly clear, with a low around 44. South wind 5 to 10 mph, with gusts as high as 20 mph.

TRONA (INDIAN WELLS) (CAZ298):
.WEDNESDAY… Sky/weather………Sunny.
Max Temperature…..65-70. 24 HR Trend……Up 1-3 degrees.
Min Humidity……..13-21 percent. 24 HR Trend……Little change.
20-Foot Winds…….North 3-6 mph in the early morning shifting to the east by afternoon.
LAL……………..1.
Ventilation………Marginal. Mixing height…….6200 ft AGL. Transport Winds…..Northeast 0 to 5 mph.
Chc Wetting Rain….0 percent.

.WEDNESDAY NIGHT… Sky/weather………Clear.
Min Temperature…..37-42. 24 HR Trend……Little change.
Max Humidity……..36-46 percent. 24 HR Trend……Down 3-9 percent.
20-Foot Winds…….North 3-6 mph.
LAL……………..1. Chc Wetting Rain….0 percent.

.THURSDAY… Sky/weather………Sunny.
Max Temperature…..64-69. 24 HR Trend……Little change.
Min Humidity……..12-19 percent. 24 HR Trend……Little change.
20-Foot Winds…….Northeast 3-6 mph in the early morning shifting to the east 3-7 mph by afternoon.
LAL……………..1.
Ventilation………Good. Mixing height…….4900 ft AGL. Transport Winds…..Northeast around 10 mph.
Chc Wetting Rain….0 percent.

BARSTOW / DAGGETT / BAKER / FT. IRWIN (CAZ228):
TODAY… * Sky/Weather………Sunny.
* Max temperature: * Valley floor….69-74. * 24 hr trend…..On average up 2 degrees.
* Min humidity: * Valley floor….11-16 percent. * 24 hr trend…..On average up 2 percent.
* Wind (Slope/valley=20 ft, 10 min avg): * Valley floor….North wind up to 10 mph.
* 10000 ft msl….West 20 to 30 mph decreasing to 15 to 25 mph in the afternoon.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1. * Haines Index……..4.

.TONIGHT… * Sky/Weather………Clear.
* Min temperature: * Valley floor….36-41. * 24 hr trend…..Little change.
* Max humidity: * Valley floor….31-36 percent. * 24 hr trend…..On average down 5 percent.
* Wind (Slope/valley=20 ft, 10 min avg):
* Valley floor….Downslope/downvalley 2 to 5 mph becoming northeast up to 10 mph after midnight.
* 10000 ft msl….Northwest 10 to 15 mph becoming east after midnight.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1. * Haines Index……..3.

.THURSDAY… * Sky/Weather………Sunny.
* Max temperature: * Valley floor….71-76. * 24 hr trend…..On average up 2 degrees.
* Min humidity: * Valley floor….10-13 percent. * 24 hr trend…..On average down 2 percent.
* Wind (Slope/valley=20 ft, 10 min avg):
* Valley floor….Northeast wind 10 to 15 mph.
* 10000 ft msl….South 10 to 15 mph.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1. * Haines Index……..3.

*BAKER:
Wednesday
Sunny, with a high near 72. North northwest wind 3 to 6 mph.
Wednesday Night
Clear, with a low around 39. Northeast wind around 6 mph.
Thursday
Sunny, with a high near 73. Northeast wind around 6 mph becoming northwest in the afternoon.
Thursday Night
Clear, with a low around 41. Northeast wind 3 to 5 mph.

SOUTHERN OWENS VALLEY / EAST SIERRA FOOTHILLS (CAZ226):
TODAY… * Sky/Weather………Sunny.
* Max temperature: * Valley floor….63-68. * 7000 feet…….49-54. * 24 hr trend…..Little change.
* Min humidity: * Valley floor….12-15 percent. * 7000 feet…….23-33 percent. * 24 hr trend…..Little change.
* Wind (slope/valley=20 ft, 10 min avg):
* Slope/valley….North winds up to 10 mph shifting to the northeast in the afternoon.
* Upper slopes….Northwest winds 10 to 15 mph with gusts to around 25 mph.
* 10000 ft msl….West up to 10 mph in the morning becoming light and variable.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1. * Haines Index……..5.

.TONIGHT… * Sky/Weather………Mostly clear.
* Min temperature: * Valley floor….30-35. * 7000 feet…9-14. * 24 hr trend….On average up 2 degrees.
* Max humidity: * Valley floor….41-46 percent. * 7000 feet…….48-53 percent.
* 24 hr trend…..On average down 5 percent.
* Wind (slope/valley=20 ft, 10 min avg):
* Slope/valley….Northwest winds up to 10 mph.
* Upper slopes….Southwest winds up to 10 mph.
* 10000 ft msl….Southeast up to 10 mph.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1. * Haines Index……..2.

.THURSDAY… * Sky/Weather………Sunny.
* Max temperature: * Valley floor….64-69. * 7000 feet…….50-55. * 24 hr trend…..Little change.
* Min humidity: * Valley floor….11-16 percent. * 7000 feet…….22-32 percent. * 24 hr trend…..Little change.
* Wind (slope/valley=20 ft, 10 min avg):
* Slope/valley….Southeast winds up to 10 mph.
* Upper slopes….Southeast winds 10 to 15 mph.
* 10000 ft msl….South 10 to 15 mph.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1. * Haines Index……..2.

KERN CO. DESERTS (CAZ299):
.WEDNESDAY… Sky/weather………Sunny.
Max Temperature…..65-70. 24 HR Trend……Up 1-3 degrees.
Min Humidity……..22-32 percent. 24 HR Trend……Up 3-5 percent.
20-Foot Winds…….Northwest 3-8 mph.
LAL……………..1.
Ventilation………Good. Mixing height…….6900 ft AGL. Transport Winds…..North around 5 mph.
Chc Wetting Rain….0 percent.

.WEDNESDAY NIGHT… Sky/weather………Clear.
Min Temperature…..37-42. 24 HR Trend……Little change.
Max Humidity……..40-50 percent. 24 HR Trend……Down 12-24 percent.
20-Foot Winds…….North 3-8 mph.
LAL……………..1. Chc Wetting Rain….0 percent.

.THURSDAY… Sky/weather………Sunny.
Max Temperature…..65-70. 24 HR Trend……Little change.
Min Humidity……..17-27 percent. 24 HR Trend……Down 1-3 percent.
20-Foot Winds…….East 3-10 mph.
LAL……………..1.
Ventilation………Good. Mixing height…….5200 ft AGL. Transport Winds…..Northeast around 15 mph.
Chc Wetting Rain….0 percent.

INLAND EMPIRE (CAZ248):
TODAY… Sky/weather………Partly cloudy…becoming mostly sunny. Patchy fog in the morning.
Max temperature…..67 to 73. 24 HR TREND……Down 5 degrees.
Min humidity……..25 to 35 percent. 24 HR TREND……Up 15 percent.
WIND (20 FT)……..Variable 2 to 4 mph becoming west around 6 mph in the afternoon.
CWR (>0.10 IN)……0 percent. LAL……………..1.

.TONIGHT… Sky/weather………Mostly clear.
Min temperature…..41 to 50. 24 HR TREND……Up 1 degree.
Max humidity……..65 to 75 percent. 24 HR TREND……Down 20 percent.
WIND (20 FT)……..Variable 2 to 5 mph becoming east 6 to 9 mph with gusts to 20 mph after midnight.
CWR (>0.10 IN)……0 percent. LAL……………..1.

.THURSDAY… Sky/weather………Mostly sunny.
Max temperature…..72 to 78. 24 HR TREND……Up 6 degrees.
Min humidity……..15 to 20 percent. 24 HR TREND……Down 10 percent.
WIND (20 FT)……..Winds east 6 to 10 mph with gusts to 20 mph becoming south around 6 mph in the afternoon.
CWR (>0.10 IN)……0 percent. LAL……………..1.

*DEVORE:
Wednesday
Sunny, with a high near 70. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 51. Light north wind increasing to 5 to 10 mph in the evening. Winds could gust as high as 20 mph.
Thursday
Sunny, with a high near 74. North wind 5 to 15 mph becoming northeast in the afternoon. Winds could gust as high as 20 mph.
Thursday Night
Mostly clear, with a low around 52. Calm wind becoming north around 5 mph after midnight.

*CHINO HILLS:
Wednesday
Sunny, with a high near 67. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 46. South wind around 5 mph becoming calm.
Thursday
Sunny, with a high near 74. East wind 5 to 10 mph becoming southwest in the afternoon.
Thursday Night
Mostly clear, with a low around 47. South wind around 5 mph becoming east in the evening.

*COLTON:
Wednesday
Sunny, with a high near 73. Light southwest wind becoming west 5 to 10 mph in the afternoon.
Wednesday Night
Clear, with a low around 48. Calm wind becoming southeast around 5 mph.
Thursday
Sunny, with a high near 77. Calm wind becoming west around 5 mph.
Thursday Night
Mostly clear, with a low around 49. East wind around 5 mph becoming calm in the evening.

SAN BERNARDINO N.F. (CAZ255):
TODAY… Sky/weather………Mostly sunny.
Max temperature…..46 to 56 above 6000 feet to 54 to 63 below 6000 feet. 24 HR TREND……Up 5 degrees.
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 west around 6 mph.
RIDGETOP………Winds west 6 to 11 mph. Gusts to 25 mph in the morning.
CWR (>0.10 IN)……0 percent. LAL……………..1.

.TONIGHT… Sky/weather………Mostly clear.
Min temperature…..26 to 36 above 6000 feet to 36 to 45 below 6000 feet. 24 HR TREND……Little change.
Max humidity……..30 to 40 percent on desert slopes to 50 to 60 percent on coastal slopes.
24 HR TREND……Little change.
WIND (20 FT)……..
SLOPES………..Winds north around 6 mph becoming east 6 to 9 mph with gusts to 20 mph after midnight.
RIDGETOP………Variable 1 to 3 mph.
CWR (>0.10 IN)……0 percent. LAL……………..1.

.THURSDAY… Sky/weather………Mostly sunny.
Max temperature…..48 to 58 above 6000 feet to 57 to 67 below 6000 feet. 24 HR TREND……Up 2 degrees.
Min humidity……..15 to 20 percent. 24 HR TREND……Little change.
WIND (20 FT)……..
SLOPES………..Winds southeast 6 to 9 mph with gusts to 20 mph.
RIDGETOP………Winds south 6 to 9 mph with gusts to 20 mph.
CWR (>0.10 IN)……0 percent. LAL……………..1.

*LAKE ARROWHEAD SCHOOL- AREA:
Wednesday
Sunny, with a high near 55. Northeast wind around 5 mph becoming west in the afternoon.
Wednesday Night
Clear, with a low around 38. Northeast wind around 5 mph.
Thursday
Sunny, with a high near 56. Southeast wind 5 to 10 mph becoming southwest in the morning.
Thursday Night
Mostly clear, with a low around 40. South wind around 5 mph.

*BIG BEAR SCHOOL AREA:
Wednesday
Sunny, with a high near 53. Southwest wind around 10 mph becoming northwest in the afternoon.
Wednesday Night
Clear, with a low around 25. Northeast wind around 5 mph becoming south after midnight.
Thursday
Sunny, with a high near 53. Southeast wind 5 to 10 mph becoming west in the afternoon.
Thursday Night
Mostly clear, with a low around 26. South wind 5 to 10 mph.

BANNING PASS (CAZ265):
TODAY… Sky/weather………Mostly sunny.
Max temperature…..75 to 80. 24 HR TREND……Up 2 degrees.
Min humidity……..15 percent. 24 HR TREND……Up 5 percent.
WIND (20 FT)……..Variable 1 to 3 mph.
CWR (>0.10 IN)……0 percent. LAL……………..1.

.TONIGHT… Sky/weather………Mostly clear.
Min temperature…..47 to 54. 24 HR TREND……Up 1 degree.
Max humidity……..30 to 40 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………Mostly sunny.
Max temperature…..76 to 81.
24 HR TREND……Up 2 degrees.
Min humidity……..10 to 15 percent.
24 HR TREND……Down 5 percent.
WIND (20 FT)……..Variable 2 to 4 mph.
CWR (>0.10 IN)……0 percent.
LAL……………..1.

JOSHUA TREE AREA (CAZ230):
TODAY… * Sky/weather…………………Sunny.
* Max Temperature……………..62-74. * 24 hr trend………………3 degrees warmer.
* Min Humidity………………..14-21 pct. * 24 hr trend………………5 pct wetter.
* Winds – 20 foot…Slope/Valley..North 5 to 15 mph.
* Winds…10000 FT MSL…………West 15 to 25 mph.
* Chance of Precip…………….0 percent. * CWR (>= 0.10 IN)…………….0 percent. * LAL………………………..1.
* Haines High Level Index………4 low potential for large plume dominated fire growth.

.TONIGHT… * Sky/weather…………………Clear.
* Min Temperature……………..40-48. * 24 hr trend………………Little change.
* Max Humidity………………..28-36 pct. * 24 hr trend………………9 pct drier.
* Winds – 20 foot…Slope/Valley..North 5 to 15 mph.
* Winds…10000 FT MSL…………West 5 to 15 mph in the evening becoming light and variable after midnight.
* Chance of Precip…………….0 percent. * CWR (>= 0.10 IN)…………….0 percent. * LAL………………………..1.

.THURSDAY… * Sky/weather…………………Sunny.
* Max Temperature……………..62-73. * 24 hr trend………………Little change.
* Min Humidity………………..12-17 pct. * 24 hr trend………………3 pct drier.
* Winds – 20 foot…Slope/Valley..North 5 to 10 mph in the morning becoming east in the afternoon.
* Winds…10000 FT MSL…………Southwest 5 to 15 mph in the morning becoming 15 to 25 mph in the afternoon.
* Chance of Precip…………….0 percent. * CWR (>= 0.10 IN)…………….0 percent. * LAL………………………..1.
* Haines High Level Index………3 very low potential for large plume dominated fire growth.

NEEDLES, RIVER BAT. (CAZ229):
.TODAY… * Sky/Weather………Sunny.
* Max temperature: * Valley floor….72-77. * 24 hr trend…..On average up 2 degrees.
* Min humidity: * Valley floor….10-18 percent. * 24 hr trend…..Little change.
* Wind (Slope/valley=20 ft, 10 min avg):
* Valley floor….North wind up to 10 mph.
* 10000 ft msl….West 15 to 25 mph.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1. * Haines Index……..4.
* Mixing height…….4800 ft agl. * Transport winds…..North around 10 knots. * Ventilation………Good.

.TONIGHT… * Sky/Weather………Clear.
* Min temperature: * Valley floor….37-42. * 24 hr trend…..Little change.
* Max humidity: * Valley floor….33-38 percent. * 24 hr trend…..On average down 2 percent.
* Wind (Slope/valley=20 ft, 10 min avg):
* Valley floor….North wind 10 to 15 mph.
* 10000 ft msl….North 10 to 15 mph.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1. * Haines Index……..3.

.THURSDAY… * Sky/Weather………Sunny.
* Max temperature: * Valley floor….73-78. * 24 hr trend…..Little change.
* Min humidity: * Valley floor….9-18 percent. * 24 hr trend…..Little change.
* Wind (Slope/valley=20 ft, 10 min avg):
* Valley floor….North wind 10 to 15 mph with gusts to around 25 mph.
* 10000 ft msl….South 10 to 15 mph.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1. * Haines Index……..4.
* Mixing height…….3000 ft agl. * Transport winds…..North 10 to 15 knots. * Ventilation………Fair.

STATELINE – CLARK COUNTY BORDER (NVZ465):
TODAY… * Sky/Weather………Sunny.
* Max temperature: * 4000 feet…….63-68. * 24 hr trend…..On average up 3 degrees.
* Min humidity: * 4000 feet…….12-17 percent. * 24 hr trend…..Little change.
* Wind (slope/valley=20 ft, 10 min avg):
* Slope/valley….North winds up to 10 mph.
* 10000 ft msl….Northwest 10 to 15 mph.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1. * Haines Index……..4.
* Mixing height…….4000 ft agl. * Transport winds…..Light winds. * Ventilation………Marginal.

.TONIGHT… * Sky/Weather………Mostly clear.
* Min temperature: * 4000 feet…….30-35. * 24 hr trend…..Little change.
* Max humidity: * 4000 feet…….35-40 percent. * 24 hr trend…..On average down 3 percent.
* Wind (slope/valley=20 ft, 10 min avg):
* Slope/valley….North winds 10 to 15 mph.
* 10000 ft msl….North 10 to 15 mph becoming northeast after midnight.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1. * Haines Index……..3.

.THURSDAY… * Sky/Weather………Sunny.
* Max temperature: * 4000 feet…….64-69. * 24 hr trend…..Little change.
* Min humidity: * 4000 feet…….11-16 percent. * 24 hr trend…..Little change.
* Wind (slope/valley=20 ft, 10 min avg):
* Slope/valley….Northeast winds 10 to 15 mph.
* 10000 ft msl….South 10 to 15 mph.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1. * Haines Index……..4.
* Mixing height…….3300 ft agl. * Transport winds…..Light winds becoming northeast around 10 knots in the afternoon.
* Ventilation………Fair.

*La Jolla CA
Wednesday
Patchy fog before 10am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 60. Calm wind becoming west around 5 mph in the afternoon.
Wednesday Night
Patchy fog after 10pm. Otherwise, partly cloudy, with a low around 50. North wind around 5 mph.
Thursday
Sunny, with a high near 64. North wind around 5 mph.
Thursday Night
Mostly clear, with a low around 51. Calm wind becoming northwest around 5 mph

*Poway CA
Wednesday
Sunny, with a high near 70. Calm wind becoming west around 5 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 47. Calm wind.
Thursday
Sunny, with a high near 77. Northeast wind around 5 mph becoming west in the afternoon.
Thursday Night
Mostly clear, with a low around 48. Calm wind.

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

Gusty canyon winds are expected across outlying Dixie Wednesday
night.

The next storm system to impact the outlook area will track east across Arizona Saturday night through Sunday. Precipitation with this storm will reach into the southern tier of Utah beginning Saturday afternoon, with the heaviest precipitation occurring Saturday night. Most locations will receive rain or a rain/snow
mix, with accumulating snow more common in the higher elevations Saturday night through early Sunday.

Wednesday
Mostly sunny, with a high near 45. South southwest wind 5 to 9 mph becoming north in the afternoon.
Wednesday Night
Mostly clear, with a low around 15. East southeast wind 5 to 9 mph becoming light and variable after midnight.
Thursday
Sunny, with a high near 48. West southwest wind 5 to 8 mph becoming northwest in the morning.
Thursday Night
Mostly clear, with a low around 25. South wind 5 to 9 mph becoming light southeast in the evening.

*************************** L.A COUNTY ********************************
CHANCE OF LIGHT SHOWERS FRIDAY NIGHT AND SATURDAY
LOS ANGELS CO. SAN GABRIEL VALLEY (CAZ548):
.WEDNESDAY… Sky/weather………Mostly sunny.
Max temperature…..68-74. 24 hr trend……Little change.
Min humidity……..35-55 percent. 24 hr trend……Up 5-10.
20-foot winds…….Variable 3-6 mph becoming southwest to west 6-12 mph with local gusts to 20 mph in the afternoon.
Marine layer……..1800 ft asl. LAL……………..1. CWR (>0.10 IN)……0 percent.

.WEDNESDAY NIGHT… Sky/weather………Mostly clear.
Min temperature…..45-51.
Max humidity……..80-100 percent except 60-80 percent in the hills.
20-foot winds…….Southwest to west 6-12 mph with local gusts to 20 mph early becoming variable 3-6 mph.
LAL……………..1. CWR (>0.10 IN)……0 percent.

.THURSDAY… Sky/weather………Sunny.
Max temperature…..73-79.
Min humidity……..18-25 percent.
20-foot winds…….Variable 3-6 mph becoming southwest to west 6-12 mph with local gusts to 20 mph in the afternoon.
LAL……………..1. CWR (>0.10 IN)……0 percent.

LOS ANGELES COUNTY SAN FERNANDO VALLEY (CAZ547):
WEDNESDAY… Sky/weather………Mostly sunny.
Max temperature…..68-75. 24 hr trend……Little change.
Min humidity……..30-50 percent. 24 hr trend……Up 5-10.
20-foot winds…….Variable 3-6 mph becoming south to southwest 6-12 mph with local gusts to 20 mph in the afternoon.
Marine layer……..1800 ft asl. LAL……………..1. CWR (>0.10 IN)……0 percent.

.WEDNESDAY NIGHT… Sky/weather………Mostly clear.
Min temperature…..42-52.
Max humidity……..65-85 percent except 50-65 percent in the hills.
20-foot winds…….South to southwest 6-12 mph with local gusts to 20 mph in the evening becoming variable 3-6 mph.
LAL……………..1. CWR (>0.10 IN)……0 percent.

.THURSDAY… Sky/weather………Sunny.
Max temperature…..70-77.
Min humidity……..15-25 percent.
20-foot winds…….Variable 3-6 mph becoming south to southwest 6-12 mph with local gusts to 20 mph in the afternoon.
LAL……………..1. CWR (>0.10 IN)……0 percent.

SANTA CLARITA VALLEY (CAZ288):
.WEDNESDAY…
Sky/weather………Mostly sunny.
Max temperature…..68-74.
24 hr trend……Little change.
Min humidity……..25-35 percent.
24 hr trend……Up 5-10.
20-foot winds…….North to northeast 5-10 mph becoming south
to southwest 6-12 mph with gusts to 20 mph
in the afternoon.
Marine layer……..1800 ft asl.
LAL……………..1.
CWR (>0.10 IN)……0 percent.

.WEDNESDAY NIGHT…
Sky/weather………Clear.
Min temperature…..40-47.
Max humidity……..50-65 percent.
20-foot winds…….South to southwest 6-12 mph with gusts to
20 mph early becoming variable 3-6 mph.
LAL……………..1.
CWR (>0.10 IN)……0 percent.

.THURSDAY…
Sky/weather………Sunny.
Max temperature…..71-75.
Min humidity……..12-20 percent.
20-foot winds…….Variable 3-6 mph becoming south to southwest
6-12 with gusts to 20 mph in the afternoon.
LAL……………..1.
CWR (>0.10 IN)……0 percent.

SANTA MONICA MOUNTAINS RECREATIONAL AREA (CAZ246):
WEDNESDAY… Sky/weather………Mostly sunny.
Max temperature…..61-70. 24 hr trend……Down 3.
Min humidity……..45-60 percent except 60-70 percent coastal slopes and higher peaks.
24 hr trend……Up 5-10.
20-foot winds…….
Valleys/lwr slopes…Variable/upslope 4-8 mph becoming south to southwest 6-12 mph with gusts to 20 mph in the afternoon.
Ridges/upr slopes….Variable 3-6 mph becoming southwest to west 8-15 mph in the afternoon.
Marine layer……..1800 ft asl. LAL……………..1. CWR (>0.10 IN)……0 percent.

.WEDNESDAY NIGHT… Sky/weather………Mostly clear.
Min temperature…..43-50.
Max humidity……..75-95 percent.
20-foot winds…….
Valleys/lwr slopes…South to southwest 6-12 mph with local gusts to 20 mph early becoming downslope/downvalley 3-6 mph.
Ridges/upr slopes….Southwest to west 8-15 mph in the evening becoming variable 3-6 mph.
LAL……………..1. CWR (>0.10 IN)……0 percent.

.THURSDAY… Sky/weather………Sunny.
Max temperature…..64-72.
Min humidity……..30-50 percent.
20-foot winds…….
Valleys/lwr slopes…Variable/upslope 4-8 mph becoming south to southwest 6-12 mph with gusts to 20 mph in the afternoon.
Ridges/upr slopes….Variable 3-6 mph becoming southwest to west 8-15 mph in the afternoon.
LAL……………..1. CWR (>0.10 IN)……0 percent.

ANGELES NATIONAL FOREST (CAZ254):
.WEDNESDAY… Sky/weather………Mostly sunny.
Max temperature…..62-70 low elevations to 53-62 higher elevations. 24 hr trend……Little change.
Min humidity……..30-45 percent except 15-30 percent higher peaks and warmer valleys. 24 hr trend……Up 10-15.
20-foot winds…….
Valleys/lwr slopes…Variable/upslope 4-8 mph becoming upvalley 8-15 mph with local gusts to 25 mph in the afternoon.
Ridges/upr slopes….Variable 3-6 mph becoming south to southwest10-20 mph in the afternoon.
Marine layer……..None. LAL……………..1. CWR (>0.10 IN)……0 percent.

.WEDNESDAY NIGHT… Sky/weather………Clear.
Min temperature…..39-49 low elevations to 26-33 colder valleys and peaks.
Max humidity……..35-55 percent except 55-75 percent colder valleys.
20-foot winds…….
Valleys/lwr slopes…Upvalley 6-12 mph with gusts to 20 mph early becoming north to northeast 5-15 mph after midnight.
Ridges/upr slopes….North to northeast 10-20 mph.
LAL……………..1. CWR (>0.10 IN)……0 percent.

.THURSDAY… Sky/weather………Sunny.
Max temperature…..63-73 low elevations to 53-63 higher elevations.
Min humidity……..15-30 percent.
20-foot winds…….
Valleys/lwr slopes…North to northeast 5-15 mph with gusts to 25 mph becoming variable 5-10 mph in the afternoon.
Ridges/upr slopes….North to northeast 10-20 mph becoming south to southwest in the afternoon.
LAL……………..1. CWR (>0.10 IN)……0 percent.

ANTELOPE VALLEY (CAZ259):
.WEDNESDAY… Sky/weather………Sunny.
Max Temperature…..65-70. 24 HR Trend……Up 1-3 degrees.
Min Humidity……..22-32 percent. 24 HR Trend……Up 3-5 percent.
20-Foot Winds…….Northwest 3-8 mph.
LAL……………..1.
Ventilation………Good. Mixing height…….6900 ft AGL. Transport Winds…..North around 5 mph.
Chc Wetting Rain….0 percent.

.WEDNESDAY NIGHT… Sky/weather………Clear.
Min Temperature…..37-42. 24 HR Trend……Little change.
Max Humidity……..40-50 percent. 24 HR Trend……Down 12-24 percent.
20-Foot Winds…….North 3-8 mph.
LAL……………..1. Chc Wetting Rain….0 percent.

.THURSDAY… Sky/weather………Sunny.
Max Temperature…..65-70. 24 HR Trend……Little change.
Min Humidity……..17-27 percent. 24 HR Trend……Down 1-3 percent.
20-Foot Winds…….East 3-10 mph.
LAL……………..1.
Ventilation………Good.
Mixing height…….5200 ft AGL. Transport Winds…..Northeast around 15 mph.
Chc Wetting Rain….0 percent.
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THIS DAY IN WEATHER HISTORY:
2005: A waterspout moved ashore (within 100 yards of the pier) and became a tornado in Huntington Beach, which damaged and downed trees and power poles. Multiple waterspouts were reported. A super cell thunderstorm moved ashore in Oceanside and spawned an F1 tornado that moved through Fallbrook, Rainbow and Temecula, causing extensive damage to cars, trees, roofs, fences, etc.

2000: SantaAna winds gusted to 92 mph at Fremont Canyon.

1995: The temperature hit 90° in San Diego, the highest temperature on record for February.

1993: Heavy rain across the region started on 2/18 and ended on 2/20. One to two inches fell in Carlsbad. Flooding occurred from Oceanside to Encinitas. Homes were damaged along the Mojave River in Hesperia.

1988: Very strong Santa Ana winds started on 2/16 and ended on this day. Gusts of 90 mph at Newport Beach and 70+ mph in the San Gabriel Mountain foothills were measured on 2/17. Gusts to 76 mph hit Monument Peak – Mt. Laguna on 2/18. Gusts to 63 mph hit Ontario on 2/17 and a gust of 50 mph was reported at Rancho Cucamonga on 2/16. Numerous trees and power lines were downed causing power outages near the foothills of the San Gabriel and San Bernardino Mountains. On this day in Pauma Valley a mobile home was overturned and shingles were torn off roofs. Fontana schools were closed due to wind damage. Three were killed when a big rig truck overturned and burned, one was killed having stepped on a downed power line). Power outages hit 200,000 customers in LA and Orange counties. Minor structural damage occurred to signs, etc. Grass fires resulted.

1984: Heavy rain that started on 2/18 and ended today caused mud slides in Orange County up to two feet deep. Up to 16 inches of snow fell in the mountains.

1980: Six storms that began on 2/13 hit Southern California continuing on this day. By 2/21, 12.75 inches measured in LA. 30 were killed in widespread floods and mud slides. Roads and hundreds of homes were destroyed or damaged. Post-fire flooding overwhelmed a basin below Harrison Canyon in north San Bernardino four times. Forty homes were damaged or destroyed there. Mission Valley was completely inundated between Friars Rd. and I-8. Large waves hit coast during this stormy period, causing coastal flooding at Mission Beach, including water over the boardwalk and into houses.

1969: Heavy rain starting on 2/16 ended on 2/26. Up to 30 inches of precipitation fell on the south slopes of Mt. San Gorgonio, 13 inches was recorded northwest of Mt. San Jacinto, around ten inches at Banning, less than one inch in eastern Coachella Valley. The death and destruction continued from the previous month. 21 died from flooding and mud slides all over California. An entire family was killed in Mt. Baldy Village when a mud slide hit their home. Extensive damage hit crops, farmland, and livestock. Creeks around Yucaipa all left their banks and substantial flooding occurred to residences and businesses. In the upper desert farmlands became lakes and more than 100 homes along the Mojave River were damaged. Roads and bridges recently repaired from previous month’s damage either washed out or were destroyed again. It snowed 24 inches in Big Bear Lake, the greatest daily amount on record for February. This also occurred earlier in the same month on 2/6/1969. This amount is also the third greatest daily amount on record.

1962: A tornado touched down in Irvine, uprooting trees and toppling power poles. It snowed 12 inches at Palomar Mountain, the greatest daily snowfall on record for February. This also occurred on 2/27/2001 and 2/13/1973.

1891: A prolonged storm dropped 33 inches of rain in Descanso within a 60 hour period from this day to 2/23. 2.56 inches fell in San Diego. There were heavy damages and losses to homes, land, livestock, transportation and power throughout the Tijuana and San Diego River Basins.
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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: 460 RH: 63% WIND: W 6 G 13
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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