WEATHER 1/14/20

DAILY FIRE WEATHER & FIRE INFO
ALL UNITS From:
EMAIL: pdupree@bdcecs.org
Ph: OFFICE:(760) 559-3032
AFTER 2200 HRS CALL: (760)-244-9790
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COUNTY F.D RADIO: #733784 CALL SIGN: COM-330

Date: 1/14/20

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.: 17

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
==========================================================================
SYNOP: (NWS SAN DIEGO)
A weak trough of low pressure and onshore flow will maintain higher humidity and cooler than average temperatures through Wednesday with gusty west winds in the mountains and deserts. A low pressure system will move quickly inland through southern California on Thursday afternoon and evening bringing stronger and gusty west winds in the mountains and deserts and a period of wetting precipitation from the coast to the mountains. Drier weather with a warming trend will follow for Friday through Monday.

CONFIDENCE AND DETAILS
Light Rain and Mountain Snow
Moderate Confidence Moderate impacts to those traveling on the roads.
• What: Rainfall totals expected to be between 0.01-0.50”. Snow levels will be between 5000 and 5500 ft. General amounts 1-3 inches, 4-6 inches on higher peaks.
• Where: Highest rain totals in Orange County and the Inland Empire. Highest snow totals in the San Bernardino County Mountains.
• When: Thursday through early Friday morning.

Gusty Winds
Moderate Confidence Gusty winds expected for the mountains and deserts resulting in hazardous travel for high profile vehicles. Damage to outdoor objects blown around by the wind.
• What: Gusty westerly winds 35-45 mph with isolated gusts 50-60 mph in wind-prone passes and canyons.
• Where: Mountains and Deserts
• When: Thursday into early Friday morning.

NWS LAS VEGAS SYNOP– (NORTH & EAST OF COUNTY)
A weather system brushing the region will enhance winds along the Sierra today and promote breezy conditions across portions of the Mojave Desert. A strong weather disturbance will move quickly through the region on Thursday, bringing gusty winds and precip chances to most areas. Aside from partly cloudy skies, quiet weather is expected this weekend.

CONFIDENCE AND DETAILS
Southern NV, Northwest AZ and Southeast CA

HIGH Confidence Hazardous travel conditions due to slick, snow covered roads in the east Sierra.
MODERATE Confidence Hazardous crosswinds, especially for high profile vehicles.
Hazardous boating conditions on Lake Mead due to strong winds and significant wave activity.

LOW Confidence Localized hazardous travel conditions in mountains of southern NV and far northwest Arizona due to
snow covered roads.

Details:
THURSDAY/EARLY FRIDAY
SNOW/RAIN
Eastern Sierra snow is expected to begin Thursday afternoon and end Thursday night.
Preliminary snow estimates are 5-10″ above 7,000 feet.
Snow levels will be around 4500 feet
With afternoon arrival, expectations for snow in the Owens Valley have lowered.
Elsewhere, a quick shot of precipitation will be possible as moisture spreads from northwest to southeast Thursday night
followed by clearing Friday morning.

WIND
A belt of southwest winds gusting 35-45+ mph affecting remote areas across south-central Nevada.
Lesser wind gusts (25-40 mph) expected across southern Nevada and areas south of I-15 THU afternoon.
A quick shot of precipitation will be possible across most zones as moisture spreads from northwest to southeast during the
evening followed by clearing Friday morning.

DAILY FUELS/FIRE POTENTIAL: N/A

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

———————————————————————
APPLE VALLEY / HESPERIA-VICTOR VALLEY (CAZ260):
TODAY… Sky/weather………Mostly sunny.
Max temperature…..57 to 64. 24 HR TREND……Down 1 degree.
Min humidity……..20 to 25 percent. 24 HR TREND……Down 5 percent.
WIND (20 FT)……..Winds west 6 to 12 mph with gusts to 25 mph.
CWR (>0.10 IN)……0 percent. LAL……………..1.

.TONIGHT… Sky/weather………Mostly clear.
Min temperature…..30 to 36. 24 HR TREND……Little change.
Max humidity……..55 to 65 percent. 24 HR TREND……Down 15 percent.
WIND (20 FT)……..Winds west 6 to 11 mph. Gusts to 25 mph in the evening.
CWR (>0.10 IN)……0 percent. LAL……………..1.

.WEDNESDAY… Sky/weather………Mostly sunny.
Max temperature…..55 to 60. 24 HR TREND……Down 3 degrees.
Min humidity……..25 to 30 percent. 24 HR TREND……Little change.
WIND (20 FT)……..Variable 2 to 4 mph becoming east around 6 mph in the afternoon.
CWR (>0.10 IN)……0 percent. LAL……………..1.

*WRIGHTWOOD:
Tuesday
Sunny, with a high near 51. West wind 5 to 15 mph, with gusts as high as 20 mph.
Tuesday Night
Mostly clear, with a low around 36. West wind 5 to 10 mph, with gusts as high as 20 mph.
Wednesday
Sunny, with a high near 50. Calm wind becoming south around 5 mph in the afternoon.
Wednesday Night
A chance of snow after 4am. Mostly cloudy, with a low around 32. Breezy, with a south wind 15 to 25 mph, with gusts as high as 35 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.
Thursday
Snow, mainly after 10am. High near 42. Windy. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.
Thursday Night
Snow likely before 10pm, then a chance of snow showers after 10pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 29. Breezy. Chance of precipitation is 70%. New snow accumulation of 1 to 3 inches possible.

*BIG PINES / WEST WRIGHTWOOD AREA
Tuesday
Sunny, with a high near 49. Wind chill values as low as 25 early. West northwest wind around 15 mph, with gusts as high as 25 mph.
Tuesday Night
Mostly clear, with a low around 32. Wind chill values as low as 25. West northwest wind 10 to 15 mph, with gusts as high as 20 mph.
Wednesday
Sunny, with a high near 51. South southwest wind around 10 mph.
Wednesday Night
A 30 percent chance of snow after 4am. Mostly cloudy, with a low around 33. Breezy. New snow accumulation of less than a half inch possible.
Thursday
Snow, mainly after 10am. High near 42. Breezy. Chance of precipitation is 80%. New snow accumulation of 2 to 4 inches possible.
Thursday Night
Snow, mainly before 10pm. Mostly cloudy, with a low around 29. Breezy.

*PHELAN:
Tuesday
Sunny, with a high near 55. South wind 5 to 15 mph becoming west in the morning. Winds could gust as high as 25 mph.
Tuesday Night
Mostly clear, with a low around 36. Light south wind increasing to 5 to 10 mph.
Wednesday
Sunny, with a high near 53. Light southeast wind increasing to 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.
Wednesday Night
A chance of rain and snow after 4am. Mostly cloudy, with a low around 35. Breezy, with a south wind 15 to 25 mph, with gusts as high as 40 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.
Thursday
A chance of rain and snow before 10am, then rain likely. Partly sunny, with a high near 48. Breezy. Chance of precipitation is 70%. Little or no snow accumulation expected.
Thursday Night
Rain showers likely before 10pm, then a slight chance of rain and snow showers. Mostly cloudy, with a low around 33. Chance of precipitation is 60%. Little or no snow accumulation expected.

TRONA (INDIAN WELLS) (CAZ298):
TUESDAY… Sky/weather………Sunny.
Max Temperature…..55-60. 24 HR Trend……Up 3-5 degrees.
Min Humidity……..23-33 percent. 24 HR Trend……Down 5-11 percent.
20-Foot Winds…….West 8-18 mph.
LAL……………..1.
Ventilation………Fair. Mixing height…….2400 ft AGL. Transport Winds…..West around 5 mph.
Chc Wetting Rain….0 percent.

.TUESDAY NIGHT…
Sky/weather………Clear. Min Temperature…..27-32. 24 HR Trend……Down 1-3 degrees.
Max Humidity……..58-68 percent. 24 HR Trend……Down 3-9 percent.
20-Foot Winds…….West 8-18 mph in the early evening becoming north 5-10 mph by midnight.
LAL……………..1. Chc Wetting Rain….0 percent.

.WEDNESDAY… Sky/weather………Sunny.
Max Temperature…..51-56. 24 HR Trend……Down 3-5 degrees.
Min Humidity……..27-37 percent. 24 HR Trend……Up 3-9 percent.
20-Foot Winds…….North 5 mph in the morning shifting to the east 4-7 mph by afternoon.
LAL……………..1.
Ventilation………Poor. Mixing height…….2200 ft AGL. Transport Winds…..Northeast around 5 mph in the morning shifting to the east in the afternoon.
Chc Wetting Rain….0 percent.

BARSTOW / DAGGETT / BAKER / FT. IRWIN (CAZ228):
TODAY… * Sky/Weather………Sunny.
* Max temperature: * Valley floor….63-68. * 24 hr trend…..On average up 5 degrees.
* Min humidity: * Valley floor….20-26 percent. * 24 hr trend…..On average down 3 percent.
* Wind (Slope/valley=20 ft, 10 min avg):
* Valley floor….Southwest wind 10 to 15 mph with gusts to around 30 mph.
* 10000 ft msl….West 40 to 50 mph decreasing to 35 to 45 mph in the afternoon.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1. * Haines Index……..5.

.TONIGHT… * Sky/Weather………Mostly clear.
* Min temperature: * Valley floor….30-35. * 24 hr trend…..Little change.
* Max humidity: * Valley floor….60-65 percent. * 24 hr trend…..On average down 4 percent.
* Wind (Slope/valley=20 ft, 10 min avg):
* Valley floor….Northwest wind up to 10 mph.
* 10000 ft msl….West 30 to 40 mph decreasing to 25 to 35 mph after midnight.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1. * Haines Index……..5.

.WEDNESDAY… * Sky/Weather………Mostly sunny.
* Max temperature: * Valley floor….61-66. * 24 hr trend…..On average down 2 degrees.
* Min humidity: * Valley floor….21-27 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.

*BAKER:
Tuesday
Sunny, with a high near 65. South wind 3 to 8 mph.
Tuesday Night
Mostly clear, with a low around 31. West wind around 6 mph becoming light and variable after midnight.
Wednesday
Mostly sunny, with a high near 61. Light and variable wind.
Wednesday Night
Partly cloudy, with a low around 34. Calm wind.

SOUTHERN OWENS VALLEY / EAST SIERRA FOOTHILLS (CAZ226):
.TODAY… * Sky/Weather………Mostly sunny.
* Max temperature: * Valley floor….53-58. * 7000 feet…….45-50. * 24 hr trend…..On average up 3 degrees.
* Min humidity: * Valley floor….17-27 percent. * 7000 feet…22-32 percent. * 24 hr trend…..On average down 5 percent.
* Wind (slope/valley=20 ft, 10 min avg):
* Slope/valley….Northwest winds 10 to 15 mph.
* Upper slopes….Windy. West winds 20 to 30 mph. Gusts up to 60 mph decreasing to 50 mph in the afternoon.
* 10000 ft msl….West 30 to 40 mph decreasing to 15 to 25 mph in the afternoon.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1. * Haines Index……..5.

.TONIGHT… * Sky/Weather………Mostly clear.
* Min temperature: * Valley floor….24-29. * 7000 feet…….7-12. * 24 hr trend…..On average down 2 degrees.
* Max humidity: * Valley floor….56-61 percent. * 7000 feet…41-46 percent. * 24 hr trend…On average down 6 percent.
* Wind (slope/valley=20 ft, 10 min avg):
* Slope/valley….Northwest winds up to 10 mph.
* Upper slopes….West winds 10 to 15 mph. Gusts up to 40 mph decreasing to 30 mph after midnight.
* 10000 ft msl….West 10 to 15 mph.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1. * Haines Index……..5.

.WEDNESDAY… * Sky/Weather………Sunny.
* Max temperature: * Valley floor….52-57. * 7000 feet…….42-47. * 24 hr trend…..On average down 2 degrees.
* Min humidity: * Valley floor….23-31 percent. * 7000 feet…28-38 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 becoming southeast around 10 mph in the afternoon.
* Upper slopes….Southwest winds 10 to 15 mph. Gusts up to 25 mph increasing to 40 mph in the afternoon.
* 10000 ft msl….Southwest 10 to 15 mph. * CWR (>= 0.10 in)….0 percent. * LAL…….1. * Haines Index……..4.

KERN CO. DESERTS (CAZ299):
WIND ADVISORY REMAINS IN EFFECT UNTIL 10 PM PST THIS EVENING
.TUESDAY… Sky/weather………Sunny.
Max Temperature…..52-57. 24 HR Trend……Up 1-3 degrees.
Min Humidity……..30-40 percent. 24 HR Trend……Little change.
20-Foot Winds…….West 12-22 mph. Gusts to 40 mph below the passes in the afternoon.
LAL……………..1. Ventilation………Good.
Mixing height…….2400 ft AGL. Transport Winds…..West 15 to 20 mph.
Chc Wetting Rain….0 percent.

.TUESDAY NIGHT… Sky/weather………Clear.
Min Temperature…..28-33. 24 HR Trend……Down 1-3 degrees.
Max Humidity……..66-76 percent. 24 HR Trend……Down 1-3 percent.
20-Foot Winds…….West 12-22 mph in the early evening becoming north to northeast 3-8 mph by midnight.
LAL……………..1. Chc Wetting Rain….0 percent.

.WEDNESDAY… Sky/weather………Sunny.
Max Temperature…..51-56. 24 HR Trend……Little change.
Min Humidity……..27-37 percent. 24 HR Trend……Down 1-3 percent.
20-Foot Winds…….Northeast up to 10 mph.
LAL……………..1.
Ventilation………Marginal. Mixing height…….2400 ft AGL. Transport Winds…..Northeast around 5 mph.
Chc Wetting Rain….0 percent.

INLAND EMPIRE (CAZ248):
.TODAY… Sky/weather………Mostly sunny.
Max temperature…..Around 62. 24 HR TREND……Little change.
Min humidity……..45 to 55 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………Partly cloudy.
Min temperature…..37 to 44. 24 HR TREND……Little change.
Max humidity……..80 to 90 percent. 24 HR TREND……Down 5 percent.
WIND (20 FT)……..Variable 1 to 3 mph.
CWR (>0.10 IN)……0 percent. LAL……………..1.

.WEDNESDAY… Sky/weather………Mostly sunny.
Max temperature…..61 to 66. 24 HR TREND……Up 5 degrees.
Min humidity……..25 to 30 percent. 24 HR TREND……Down 25 percent.
WIND (20 FT)……..Variable 1 to 3 mph.
CWR (>0.10 IN)……0 percent. LAL……………..1.

*DEVORE:
Tuesday
Sunny, with a high near 60. Calm wind becoming southwest around 5 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 44. Calm wind becoming north around 5 mph after midnight.
Wednesday
Sunny, with a high near 63. Northeast wind around 5 mph becoming southwest in the afternoon.
Wednesday Night
A chance of rain after 4am. Mostly cloudy, with a low around 42. Calm wind becoming east around 5 mph. Chance of precipitation is 30%.

*CHINO HILLS:
Tuesday
Patchy fog before 10am. Otherwise, sunny, with a high near 60. Light and variable wind becoming west 5 to 10 mph in the afternoon.
Tuesday Night
Patchy fog after 10pm. Otherwise, mostly clear, with a low around 41. Southwest wind around 5 mph becoming calm.
Wednesday
Patchy fog before 10am. Otherwise, sunny, with a high near 62. Northeast wind 5 to 10 mph becoming southwest in the afternoon.

*COLTON:
Tuesday
Sunny, with a high near 63. Calm wind becoming west around 5 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 42. Calm wind.
Wednesday
Mostly sunny, with a high near 66. Calm wind becoming southwest around 5 mph in the afternoon.
Wednesday Night
Mostly cloudy, with a low around 43. South wind around 5 mph becoming calm after midnight.

SAN BERNARDINO N.F. (CAZ255):
.TODAY… Sky/weather………Mostly sunny.
Max temperature…..44 to 54 above 6000 feet to 48 to 57 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…Down 10 percent.
WIND (20 FT)……..
SLOPES………..Winds west 6 to 10 mph with gusts to 20 mph.
RIDGETOP………Winds west 8 to 15 mph with gusts to 30 mph.
CWR (>0.10 IN)……0 percent. LAL……………..1.

.TONIGHT… Sky/weather………Partly cloudy.
Min temperature…..25 to 35 above 6000 feet to 32 to 41 below 6000 feet. 24 HR TREND……Down 1 degree.
Max humidity…30 to 40 percent on desert slopes to 60 to 70 percent on coastal slopes. 24 HR TREND…Down 15 percent.
WIND (20 FT)……..
SLOPES………..Winds west 6 to 9 mph with gusts to 20 mph in the evening becoming downslope 2 to 5 mph.
RIDGETOP………Winds west 6 to 13 mph. Gusts to 30 mph.
CWR (>0.10 IN)……0 percent. LAL……………..1.

.WEDNESDAY… Sky/weather………Mostly sunny.
Max temperature…..43 to 53 above 6000 feet to 49 to 59 below 6000 feet. 24 HR TREND……Up 1 degree.
Min humidity……..15 to 25 percent. 24 HR TREND……Down 5 percent.
WIND (20 FT)……..
SLOPES………..Upslope 2 to 5 mph becoming south around 6 mph in the afternoon.
RIDGETOP………Winds southwest 6 to 10 mph with gusts to 20 mph.
CWR (>0.10 IN)……0 percent. LAL……………..1.

*LAKE ARROWHEAD SCHOOL- AREA:
Tuesday
Sunny, with a high near 49. South wind around 5 mph.
Tuesday Night
Mostly clear, with a low around 33. Southeast wind around 5 mph.
Wednesday
Mostly sunny, with a high near 49. South wind 5 to 15 mph, with gusts as high as 25 mph.
Wednesday Night
A chance of snow after 4am. Mostly cloudy, with a low around 31. South wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 30%. New snow accumulation of less than a half inch possible
Thursday
Snow, mainly after 10am. Patchy fog. High near 40. Breezy. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.
Thursday Night
Snow before 10pm, then snow showers likely after 10pm. Patchy fog before 10pm. Low around 29. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.

*BIG BEAR SCHOOL AREA:
Tuesday
Sunny, with a high near 50. Southwest wind 10 to 15 mph, with gusts as high as 20 mph.
Tuesday Night
Mostly clear, with a low around 26. Southwest wind around 10 mph, with gusts as high as 20 mph.
Wednesday
Mostly sunny, with a high near 49. Southwest wind 5 to 15 mph, with gusts as high as 20 mph.
Wednesday Night
Mostly cloudy, with a low around 25. Southwest wind 10 to 15 mph, with gusts as high as 30 mph.
Thursday
Snow likely, mainly after 4pm. Patchy fog. Otherwise, partly sunny, with a high near 42. Breezy. Chance of precipitation is 60%. New snow accumulation of around an inch possible.
Thursday Night
Snow likely before 10pm, then a chance of snow showers after 10pm. Patchy fog before 10pm. Otherwise, cloudy during the early evening, then gradual clearing, with a low around 20. Breezy. Chance of precipitation is 60%. New snow accumulation of 1 to 3 inches possible.

BANNING PASS (CAZ265):
TODAY… Sky/weather………Mostly sunny…becoming partly cloudy.
Max temperature…..63 to 68. 24 HR TREND……Up 4 degrees.
Min humidity……..30 percent. 24 HR TREND……Little change.
WIND (20 FT)……..Variable 2 to 4 mph becoming southeast around 6 mph in the afternoon.
CWR (>0.10 IN)……0 percent. LAL……………..1.

.TONIGHT… Sky/weather………Partly cloudy.
Min temperature…..41 to 49. 24 HR TREND……Up 2 degrees.
Max humidity……..45 to 55 percent. 24 HR TREND……Down 15 percent.
WIND (20 FT)……..Winds west around 6 mph in the evening becoming variable 2 to 4 mph.
CWR (>0.10 IN)……0 percent. LAL……………..1.

.WEDNESDAY… Sky/weather………Mostly sunny.
Max temperature…..64 to 69. 24 HR TREND……Little change.
Min humidity……..25 to 30 percent. 24 HR TREND……Little change.
WIND (20 FT)……..Variable 1 to 3 mph.
CWR (>0.10 IN)……0 percent. LAL……………..1.

JOSHUA TREE AREA (CAZ230):
.TODAY… * Sky/weather…………………Mostly sunny.
* Max Temperature……………..55-66. * 24 hr trend………………4 degrees warmer.
* Min Humidity………………..27-35 pct. * 24 hr trend………………3 pct drier.
* Winds – 20 foot…Slope/Valley..Southwest 5 to 15 mph.
* 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 clear.
* Min Temperature……………..35-42. * 24 hr trend………………Little change.
* Max Humidity………………..47-65 pct. * 24 hr trend………………9 pct drier.
* Winds – 20 foot…Slope/Valley..Northwest 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.

.WEDNESDAY… * Sky/weather…………………Partly sunny.
* Max Temperature……………..53-65. * 24 hr trend………………Little change.
* Min Humidity………………..25-34 pct. * 24 hr trend………………Little RH change.
* Winds – 20 foot…Slope/Valley..North 5 to 10 mph in the morning becoming east in the afternoon.
* 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………5 moderate potential for large plume dominated fire growth.

NEEDLES, RIVER BAT. (CAZ229):
TODAY… * Sky/Weather………Sunny.
* Max temperature: * Valley floor….64-69. * 24 hr trend…..On average up 4 degrees.
* Min humidity: * Valley floor….21-31 percent. * 24 hr trend…..On average down 3 percent.
* Wind (Slope/valley=20 ft, 10 min avg):
* Valley floor….South wind up to 10 mph with gusts to around 25 mph.
* 10000 ft msl….West 35 to 45 mph decreasing to 30 to 40 mph in the afternoon.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1. * Haines Index……..5.
* Mixing height…….3400 ft agl.
* Transport winds…..Light winds becoming south around 10 knots in the afternoon. * Ventilation………Good.

.TONIGHT… * Sky/Weather………Mostly clear.
* Min temperature: * Valley floor….36-41. * 24 hr trend…..Little change.
* Max humidity: * Valley floor….60-65 percent. * 24 hr trend…..Little change.
* Wind (Slope/valley=20 ft, 10 min avg):
* Valley floor….Southeast wind up to 10 mph in the evening becoming downslope/downvalley 2 to 5 mph.
* 10000 ft msl….West 25 to 35 mph increasing to southwest 30 to 40 mph after midnight.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1. * Haines Index……..5.

.WEDNESDAY… * Sky/Weather………Mostly sunny.
* Max temperature: * Valley floor….64-69. * 24 hr trend…..Little change.
* Min humidity: * Valley floor….23-33 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….Southwest 25 to 35 mph decreasing to 15 to 25 mph in the afternoon.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1. * Haines Index……..5.
* Mixing height…….2800 ft agl. * Transport winds…..North around 10 knots. * Ventilation………Fair.

STATELINE – CLARK COUNTY BORDER (NVZ465):
TODAY… * Sky/Weather………Sunny.
* Max temperature: * 4000 feet…….57-62. * 24 hr trend…..On average up 5 degrees.
* Min humidity: * 4000 feet…….23-33 percent. * 24 hr trend…..On average down 2 percent.
* Wind (slope/valley=20 ft, 10 min avg):
* Slope/valley….South winds up to 10 mph.
* 10000 ft msl….West 30 to 40 mph decreasing to 20 to 30 mph in the afternoon.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1. * Haines Index……..5.
* Mixing height…….2100 ft agl. * Transport winds…..Light winds. * Ventilation………Poor.

.TONIGHT… * Sky/Weather………Mostly clear.
* Min temperature: * 4000 feet…….29-34. * 24 hr trend…..Little change.
* Max humidity: * 4000 feet…….67-72 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….Southwest 10 to 20 mph increasing to 20 to 30 mph after midnight.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1. * Haines Index……..5.

.WEDNESDAY… * Sky/Weather………Mostly sunny.
* Max temperature: * 4000 feet…….56-61. * 24 hr trend…..Little change.
* Min humidity: * 4000 feet…….25-35 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.
* 10000 ft msl….Southwest 20 to 30 mph.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1. * Haines Index……..5.
* Mixing height…….2400 ft agl. * Transport winds…..Light winds. * Ventilation………Poor.

*La Jolla CA
Tuesday
Mostly sunny, with a high near 58. Southeast wind around 5 mph becoming west in the afternoon.
Tuesday Night
Mostly cloudy, with a low around 45. Calm wind.
Wednesday
Mostly cloudy, then gradually becoming sunny, with a high near 60. Calm wind becoming west around 5 mph in the afternoon.
Wednesday Night
Mostly cloudy, with a low around 49. Southeast wind around 5 mph.

*Poway CA
Tuesday
Sunny, with a high near 63. Southeast wind around 5 mph becoming west in the afternoon.
Tuesday Night
Partly cloudy, with a low around 41. Calm wind.
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 46. Southeast wind around 5 mph.

*CEDAR CITY Ut.
DAYS TWO THROUGH SEVEN…Tuesday through Sunday

A couple more storm systems will impact the state through much of the week. Mountain snowfall totals will be significant over the course of the week, with brief periods of snow that could create impacts for the valleys at times, including the Tuesday evening commute.
Tuesday
Sunny, with a high near 45. Southwest wind 7 to 16 mph.
Tuesday Night
Mostly clear, with a low around 25. South southwest wind 6 to 16 mph.
Wednesday
Sunny, with a high near 46. Southwest wind 10 to 16 mph.
Wednesday Night
Partly cloudy, with a low around 33. South southeast wind 11 to 18 mph.

*************************** L.A COUNTY ********************************
LOS ANGELS CO. SAN GABRIEL VALLEY (CAZ548):
TUESDAY… Sky/weather………Mostly sunny.
Max temperature…..61-66. 24 hr trend……Little change.
Min humidity……..45-60 percent. 24 hr trend……Little change.
20-foot winds…….Variable 3-8 mph.
Marine layer……..2500 ft asl.
LAL……………..1. CWR (>0.10 IN)……0 percent.

.TUESDAY NIGHT… Sky/weather………Mostly clear.
Min temperature…..42-47.
Max humidity……..70-100 percent.
20-foot winds…….Variable 3-8 mph.
LAL……………..1. CWR (>0.10 IN)……0 percent.

.WEDNESDAY… Sky/weather………Mostly sunny.
Max temperature…..63-67.
Min humidity……..25-45 percent.
20-foot winds…….Variable 3-8 mph.
LAL……………..1. CWR (>0.10 IN)……0 percent.

ANGELES NATIONAL FOREST (CAZ254):
.TUESDAY… Sky/weather………Mostly sunny.
Max temperature…..53-61 low elevations to 44-51 higher elevations and coastal slopes. 24 hr trend……Little change.
Min humidity……..35-55 percent except 20-30 percent higher peaks and warmer valleys. 24 hr trend……Little change.
20-foot winds…….
Valleys/lwr slopes…Northwest 15-25 mph with gusts to 40 mph. Strongest through the I-5 Corridor.
Ridges/upr slopes….Northwest 10-20 mph with gusts to 25 mph. Isolated gusts to 40 mph near Whitaker Peak.
Marine layer……..2500 ft asl. LAL……………..1. CWR (>0.10 IN)……0 percent.

.TUESDAY NIGHT… Sky/weather………Mostly clear.
Min temperature…..35-42 low elevations to 27-33 colder valleys and peaks.
Max humidity……..40-60 percent except 75-85 percent colder valleys.
20-foot winds…….
Valleys/lwr slopes…Northwest 15-25 mph.
Ridges/upr slopes….West 10-20 mph with gusts to 25 mph.
LAL……………..1. CWR (>0.10 IN)……0 percent.

.WEDNESDAY… Sky/weather………Mostly sunny.
Max temperature…..56-62 low elevations to 48-54 higher elevations.
Min humidity……..15-35 percent.
20-foot winds…….
Valleys/lwr slopes…Northwest 6-12 mph becoming south in the afternoon.
Ridges/upr slopes….Southwest 6-12 mph.
LAL……………..1. CWR (>0.10 IN)……0 percent.

ANTELOPE VALLEY (CAZ259):
.TUESDAY… Sky/weather………Mostly sunny.
Max temperature…..52-62. 24 hr trend……Little change.
Min humidity……..25-40 percent except 40-50 percent in the hills. 24 hr trend……Little change.
20-foot winds…….West 15-25 mph.
Marine layer……..None. LAL……………..1. CWR (>0.10 IN)……0 percent.

.TUESDAY NIGHT… Sky/weather………Mostly clear.
Min temperature…..28-35.
Max humidity……..80-100 percent except 60-70 percent in the hills.
20-foot winds…….West 15-25 mph with gusts to 35 mph in the evening becoming 6-12 mph.
LAL……………..1. CWR (>0.10 IN)……0 percent.

.WEDNESDAY… Sky/weather………Mostly sunny.
Max temperature…..50-57.
Min humidity……..20-30 percent.
20-foot winds…….West 6-12 mph.
LAL……………..1. CWR (>0.10 IN)……0 percent.

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THIS DAY IN WEATHER HISTORY:
2007: A cold snap settled over Southern California. Some remarkable records were set, particularly on 1/13 and on this day. -7° at Fawnskin, -2° at Big Bear City and Wrightwood, 5° at Hesperia and Mt. Laguna, 10° at Borrego Airport, 12° at Campo, 16° at Ramona, 18° at Thermal, 19° in Hemet, 20° at Camp Pendleton. $114.7 million in crop damage in San Diego Co. $86 million in Riverside Co. $11.1 in San Bernardino Co. $600 thousand damage from broken pipes in San Bernardino Co. All three counties were declared disaster areas.

2005: Extreme runoff from nearly a week of heavy rainfall forced the emergency release of water from Prado Dam into the Santa Ana River. Hundreds of residents had to evacuate and Corona Municipal Airport was flooded. Planes were moved to nearby streets to escape the flooding.

1997: A storm that began on 1/12 and ended on 1/15 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 die from exposure near Pine Valley.

1995: A heavy rain storm hit the northern Inland Empire. It dropped eight to nine inches of rain in Yucaipa, causing extensive flooding and road closures.

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 rain 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, an F1 tornado struck the city of Buena Park, blowing out windows and downing trees, fences and street signs. No injuries were reported.

1990: A tornado in the East City Heights neighborhood of San Diego caused property damage. A waterspout turned tornado hit Shelter Island – San Diego and tossed boats.

1978: Starting on this day and ending on 1/15, 2.65 inches of precipitation fell in San Diego, the greatest 24-hour total on record for January.

1963: Sub freezing low temperatures gripped Southern California for a second consecutive day, damaging local citrus, avocado and flower crops. All-time record low temperatures were set in Elsinore (15°), Oceanside (20°), and Chula Vista (24°). It was 22° in Palm Springs, the second lowest temperature on record.

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: The high temperature of 46° in Santa Ana was the lowest high temperature on record. This also occurred on 1/19/1949 and 2/23/1953.

1916: Widespread heavy rains hit Southern California starting on this day 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.

1882: A cold winter storm that started on 1/1 and ended on this day brought lots of snow to the lowlands. 15 inches of snow fell at San Bernardino. 3 feet of snow fell in Campo over four days and produced 8 foot drifts in spots. Two to five inches fell in outlying San Diego, including four inches along Poway Grade, 3 inches at El Cajon and one inch in Poway. 5 inches fell in Riverside. Light snow fell in Del Mar. Snow flakes fell, but did not stick at San Diego Lindbergh Field. Birds and livestock were killed, telegraph lines were knocked down and citrus crops were damaged.
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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. @ 0755 Hrs. TEMP: 430 RH: 62% WIND: W 3 G 9
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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