WEATHER 2/10/20

DAILY FIRE WEATHER & FIRE INFO
ALL UNITS From:
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Date: 2/10/20

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.: 45

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:
The area of low pressure that was directly over Southern California yesterday afternoon is now centered off the Northern Baja Coast. High pressure over the eastern Pacific Ocean will get a little closer to the California Coast Tuesday and then shift back to the west Wednesday as a weak trough drops south across the State. A couple of deeper troughs will move inland into the Pacific Northwest and then drop into the Great Basin Thursday through this weekend.

ꞏ North to northeast winds of 20 to 40 mph with gusts to 60 mph will surface across the mountains and below the canyons and passes of Southern California as well as the Owens Valley through Tuesday morning.

ꞏ Winds will decrease Tuesday afternoon and become light by Tuesday evening.

ꞏ Scattered showers will occur south and east of Los Angeles County through this afternoon.

ꞏ Most locations will receive less than a quarter inch of additional rainfall. The locations furthest south will receive the most rainfall.
ꞏ The snow level will be around 5,000 feet.

ꞏ Temperatures will be near normal through Thursday, with mid 40s to mid 50s across the mountains and 60s to low 70s in the valleys.

ꞏ Temperatures will become a little below normal Friday through this weekend.

ꞏ Minimum humidity will be mainly in the teens Tuesday and Wednesday and then increase to above 20% Thursday through this weekend.

ꞏ Strong westerly winds will surface through the desert passes Sunday

SYNOP: (NWS SAN DIEGO)
The current storm system will continue to bring some showers to the area, with showers most widespread and heaviest in southern portions of the forecast area, particularly San Diego County. Accumulating snow is expected in the mountains, with locally heavy snow at higher elevations of the San Diego County Mountains. Most of the precipitation will end by Monday night. Offshore winds will strengthen today and remain gusty into Tuesday as the storm moves to the southeast. Northwest flow will prevail for the remainder of the week with near normal temperatures, with another chance of light precipitation for next weekend.

KEY POINTS
● A winter storm will move through the region, bringing periodic light to moderate showers to the lowlands and snow to the mountains through Monday night with precipitation coming to an end Tuesday morning.

● We still have lower than average confidence in snowfall amounts, especially in the San Bernardino County mountains

● Changes since last briefing:
○ A Winter Storm Warning is in effect for the San Bernardino Mountains through 4 AM Tuesday.

○ A Winter Weather Advisory is in effect for the Riverside County mountains (except the Santa Anas) and the San Diego County mountains from 10 PM this evening through 4 AM Tuesday
○ A Winter Weather Advisory in in effect for the high desert from 6 PM
this evening through 10 PM Monday

Snow in the Mountains and High Desert
Low Confidence
Snowfall impacting travel in the mountains to parts of the high Desert

● What: Moderate to heavy snow in the mountains with light snow across parts of the high desert

● Where: Mountains and high desert.

● Snowfall amounts:
○ Cajon Pass and high desert: Trace-2 inches

○ San Bernardino County mountains:

■ Elevation 3500-4500 feet: 1-3”

■ Elevation 4500-5500 feet: 3-6”

■ Elevation 5500+ feet: 7-14”, highest amounts Big Bear Lake area

○ Riverside and San Diego County mountains:
■ Elevation 4000-5000 feet: 1-2”
■ Elevation 5000-6000 feet: 2-4”
■ Elevation 6000+ feet: 5-12”
Rain in the Lowlands
High Confidence
Periodic showers resulting in slick roadways
● What: Periodic showers will continue
● Where: The lowlands
● When: Now through Tuesday morning

● Key Points:
○ Flash flooding is not anticipated due to low rainfall rates of 0.25 inches/hour or less

● Rainfall amounts:
○ Coast and valleys: 0.05-0.25”, except 0.25-0.50” over far southern San Diego County
○ Mountain slopes: 0.40-0.75”
○ Lower desert: 0.15-0.30”
○ High desert: 0.05-0.25”
Windy in the Mountains, the northern Inland Empire and Inland Orange County
High Confidence
Northeast winds resulting in difficult travel for high-profile vehicles along with the possibility of downed trees

● What: Strong northeast winds

● Where: In the mountains, especially from the ridge tops to the coastal slopes as well as through and below passes and canyons where northeast winds of 20-30 mph with gusts to 50 mph are forecast. Gusts of 40-50 mph over the northern Inland Empire to the Santa Ana coastal slopes and foothills

● When : Now through Tuesday morning.

SUMMARY
A storm system will continue to impact Southern California through Monday night, coming to an end Tuesday morning. The main impact from this storm will be snowfall over the mountains. This will impact travel there, as well as have the potential to deliver light snow accumulation through the Cajon Pass and across parts of the high desert. Confidence on our snowfall forecast is lower than average. A track of the low further south than predicted would result in much lighter snowfall amounts, particularly in the San Bernardino County mountains. Rainfall will be periodic over the lowlands with
amounts on the light side with no flash flooding anticipated.

NWS LAS VEGAS SYNOP– (NORTH & EAST OF COUNTY)
A low pressure system will bring rain and mountain snow chances to mainly the southern Mojave Desert and Northwest Arizona through tonight. In addition, cooler temperatures and gusty north winds can be expected. Improving conditions are anticipated for the remainder of the week though low chances of showers will return by Friday and Saturday across the Great Basin and Sierra.
Updates:
Wind Advisories issued for Lake Mead and Lake Mohave area as well as the eastern Mojave Desert and Southern Clark County

Winter Weather Advisory remains in effect for Yucca Valley in southwest San Bernardino County through 4 PM PST above 3,000 feet

CONFIDENCE AND DETAILS
Southern NV/Northwest AZ/Southeast CA
HIGH Confidence
Strong crosswinds on east-west oriented roads, especially for high profile vehicles.
Dangerous boating conditions due to strong winds and significant wave activity.
Hazardous travel conditons due to slick roadways south of I-40.
LOW Confidence Hazardous travel condi_ons due to slick, snow covered roads (Yucca Valley)
Details:

TODAY THROUGH TUESDAY
A weather system spinning up over the SoCal Coast will move inland across northwest Mexico and southern Arizona MON. early

TUE.
Widespread gusty north winds today and tonight.

Scattered snow showers with accumulations 1-2″ possible in the Morongo Basin with Snow levels 3000-4000′ MSL

North winds gusting over 40 mph possible for CO River Valley late MON-TUE.

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………Cloudy…becoming partly cloudy. Chance of showers.
Max temperature…..55 to 61. 24 HR TREND……Up 5 degrees.
Min humidity……..20 percent. 24 HR TREND……Down 5 percent.
WIND (20 FT)……..Winds northeast 6 to 16 mph with gusts to 35 mph.
CWR (>0.10 IN)……18 percent. LAL……………..1.

.TONIGHT… Sky/weather………Mostly clear.
Min temperature…..31 to 36. 24 HR TREND……Little change.
Max humidity……..40 to 50 percent. 24 HR TREND……Down 25 percent.
WIND (20 FT)……..Winds north 6 to 13 mph with gusts to 25 mph.
CWR (>0.10 IN)……0 percent. LAL……………..1.

.TUESDAY… Sky/weather………Mostly sunny.
Max temperature…..55 to 60. 24 HR TREND……Down 1 degree.
Min humidity……..15 percent. 24 HR TREND……Down 5 percent.
WIND (20 FT)……..Winds northeast 6 to 13 mph with gusts to 30 mph.
CWR (>0.10 IN)……0 percent. LAL……………..1.

*WRIGHTWOOD:
…WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 AM PST TUESDAY ABOVE 4000 FEET
Monday
Snow showers likely, mainly before 10am. Areas of fog. Otherwise, partly sunny, with a high near 38. North wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 3 inches possible.
Monday Night
Partly cloudy, with a low around 27. North wind 15 to 20 mph, with gusts as high as 30 mph.
Tuesday
Sunny, with a high near 44. North wind around 15 mph, with gusts as high as 25 mph.
Tuesday Night
Clear, with a low around 30.

*BIG PINES / WEST WRIGHTWOOD AREA
WINTER STORM WARNING NOW IN EFFECT UNTIL 3 PM PST MONDAY
HIGH WIND WATCH IN EFFECT FROM THIS EVENING THROUGH TUESDAY MORNING
Monday
Snow showers likely, mainly before 10am. Mostly sunny, with a high near 38. Wind chill values as low as 10. Windy, with a north wind 30 to 35 mph, with gusts as high as 50 mph. Chance of precipitation is 60%. New snow accumulation of around an inch possible.
Monday Night
Clear, with a low around 28. Wind chill values as low as 10. Very windy, with a north wind 25 to 35 mph increasing to 35 to 45 mph after midnight. Winds could gust as high as 65 mph.
Tuesday
Sunny, with a high near 46. Very windy, with a north northeast wind 45 to 50 mph decreasing to 40 to 45 mph in the morning. Winds could gust as high as 75 mph.
Tuesday Night
Clear, with a low around 33. Windy.

*PHELAN:
WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 6 PM THIS EVENING TO 10 PM PST MONDAY

Monday
Snow showers likely, mainly before 10am. Areas of fog. Otherwise, partly sunny, with a high near 47. North wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.
Monday Night
Mostly clear, with a low around 33. Northwest wind 10 to 15 mph, with gusts as high as 20 mph.
Tuesday
Sunny, with a high near 51. Northwest wind 10 to 15 mph becoming north in the afternoon. Winds could gust as high as 20 mph.
Tuesday Night
Clear, with a low around 34.

TRONA (INDIAN WELLS) (CAZ298):
…GUSTY NORTHEAST WINDS UNTIL MONDAY EVENING IN THE CENTRAL SIERRA NEVADA
MONDAY… Sky/weather………Partly cloudy then becoming sunny. Slight chance of snow in the morning. Snow level 3000 feet.
Max Temperature…..58-63. 24 HR Trend……Up 7-12 degrees.
Min Humidity……..10-17 percent. 24 HR Trend……Down 5-10 percent.
20-Foot Winds…….North 15-21 mph with gusts to 35 mph.
LAL……………..1.
Ventilation………Excellent. Mixing height…….4700 ft AGL. Transport Winds…..North around 30 mph.
Chc Wetting Rain….0 percent.

.MONDAY NIGHT… Sky/weather………Clear.
Min Temperature…..33-38. 24 HR Trend……Little change.
Max Humidity……..32-42 percent. 24 HR Trend……Little change.
20-Foot Winds…….North 8-14 mph.
LAL……………..1. Chc Wetting Rain….0 percent.

.TUESDAY… Sky/weather………Sunny.
Max Temperature…..59-64. 24 HR Trend……Little change.
Min Humidity……..11-18 percent. 24 HR Trend……Little change.
20-Foot Winds…….Northeast 5-10 mph.
LAL……………..1.
Ventilation………Excellent. Mixing height…….5300 ft AGL. Transport Winds…..North around 25 mph.
Chc Wetting Rain….0 percent.

BARSTOW / DAGGETT / BAKER / FT. IRWIN (CAZ228):
.TODAY… * Sky/Weather………Mostly sunny. Isolated snow in the morning. Scattered rain through the day.
* Max temperature: * Valley floor….62-67. * 24 hr trend…..On average up 2 degrees.
* Min humidity: * Valley floor….14-24 percent. * 24 hr trend…..On average down 4 percent.
* Wind (Slope/valley=20 ft, 10 min avg):
* Valley floor….North wind 10 to 15 mph with gusts to around 35 mph.
* 10000 ft msl….East 30 to 40 mph becoming northeast 25 to 35 mph in the afternoon.
* CWR (>= 0.10 in)….25 percent. * LAL……………..1. * Haines Index……..4.

.TONIGHT… * Sky/Weather………Partly cloudy.
* Min temperature: * Valley floor….34-39. * 24 hr trend…..Little change.
* Max humidity: * Valley floor….33-38 percent. * 24 hr trend…..On average down 21 percent.
* Wind (Slope/valley=20 ft, 10 min avg):
* Valley floor….North wind 10 to 20 mph with gusts to around 45 mph.
* 10000 ft msl….Northeast 25 to 35 mph increasing to north 40 to 50 mph after midnight.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1. * Haines Index……..5.

.TUESDAY… * Sky/Weather………Sunny.
* Max temperature: * Valley floor….60-65. * 24 hr trend…..On average down 2 degrees.
* Min humidity: * Valley floor….10-15 percent. * 24 hr trend…..On average down 6 percent.
* Wind (Slope/valley=20 ft, 10 min avg):
* Valley floor….North wind 10 to 20 mph. Gusts up to 40 mph decreasing to 30 mph in the afternoon.
* 10000 ft msl….North 35 to 45 mph decreasing to 30 to 40 mph in the afternoon.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1. * Haines Index……..4.

*BAKER:
Monday
A 30 percent chance of rain, mainly before 9am. Partly sunny, then gradually becoming sunny, with a high near 64. Breezy, with a north wind 18 to 21 mph, with gusts as high as 30 mph.
Monday Night
Clear, with a low around 36. Breezy, with a north wind 16 to 22 mph, with gusts as high as 31 mph.
Tuesday
Sunny, with a high near 63. North wind 10 to 16 mph, with gusts as high as 23 mph.
Tuesday Night
Clear, with a low around 34.

SOUTHERN OWENS VALLEY / EAST SIERRA FOOTHILLS (CAZ226):
TODAY… * Sky/Weather………Sunny.
* Max temperature: * Valley floor….58-63. * 7000 feet…….44-49. * 24 hr trend…..On average up 9 degrees.
* Min humidity: * Valley floor….10-15 percent. * 7000 feet….20-30 percent. * 24 hr trend…..On average down 8 percent.
* Wind (slope/valley=20 ft, 10 min avg):
* Slope/valley….North winds 15 to 25 mph with gusts to around 40 mph.
* Upper slopes….North winds 15 to 25 mph with gusts to around 40 mph.
* 10000 ft msl….Northeast 20 to 30 mph becoming north 15 to 25
mph in the afternoon.
* CWR (>= 0.10 in)….0 percent.
* LAL……………..1.
* Haines Index……..5.

.TONIGHT… * Sky/Weather………Clear.
* Min temperature: * Valley floor….27-32. * 7000 feet…….9-14. * 24 hr trend…..On average up 5 degrees.
* Max humidity: * Valley floor….38-43 percent. * 7000 feet…….35-40 percent.
* 24 hr trend…..On average down 10 percent.
* Wind (slope/valley=20 ft, 10 min avg):
* Slope/valley….North winds 10 to 15 mph with gusts to around 35 mph.
* Upper slopes….North winds 10 to 15 mph with gusts to around 35 mph.
* 10000 ft msl….North 15 to 25 mph.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1. * Haines Index……..5.

.TUESDAY… * Sky/Weather………Sunny.
* Max temperature: * Valley floor….58-63.
* 7000 feet…….47-52. * 24 hr trend…..Little change.
* Min humidity: * Valley floor…11-14 percent. * 7000 feet…17-27 percent. * 24 hr trend…..On average down 2 percent.
* Wind (slope/valley=20 ft, 10 min avg):
* Slope/valley….North winds 10 to 15 mph.
* Upper slopes….North winds 10 to 15 mph with gusts to around 35 mph.
* 10000 ft msl….North 15 to 20 mph becoming 15 to 25 mph in the afternoon.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1. * Haines Index……..4.

KERN CO. DESERTS (CAZ299):
…GUSTY NORTHEAST WINDS UNTIL MONDAY EVENING IN THE CENTRAL SIERRA NEVADA
MONDAY… Sky/weather………Partly cloudy then mostly sunny. Slight chance of rain in the morning. Slight chance of light snow or flurries in the morning. Snow level 3000 feet.
Max Temperature…..57-62. 24 HR Trend……Up 6-11 degrees.
Min Humidity……..19-29 percent. 24 HR Trend……Down 7-12 percent.
20-Foot Winds…….Northeast 12-20 mph with gusts to 35 mph.
LAL……………..1.
Ventilation………Excellent. Mixing height…….6100 ft AGL. Transport Winds…..Northeast 25 to 30 mph.
Chc Wetting Rain….0 percent.

.MONDAY NIGHT… Sky/weather………Clear.
Min Temperature…..33-38. 24 HR Trend……Little change.
Max Humidity……..35-45 percent. 24 HR Trend……Down 2-4 percent.
20-Foot Winds…….Northeast 6-12 mph.
LAL……………..1. Chc Wetting Rain….0 percent.

.TUESDAY… Sky/weather………Sunny.
Max Temperature…..57-62. 24 HR Trend……Little change.
Min Humidity……..15-25 percent. 24 HR Trend……Little change.
20-Foot Winds…….Northeast 6-11 mph.
LAL……………..1.
Ventilation………Excellent. Mixing height…….4800 ft AGL. Transport Winds…..Northeast around 25 mph.
Chc Wetting Rain….0 percent.

INLAND EMPIRE (CAZ248):
WIND ADVISORY REMAINS IN EFFECT FROM 9 PM THIS EVENING TO NOONPST MONDAY

*DEVORE:
WIND ADVISORY REMAINS IN EFFECT FROM 9 PM THIS EVENING TO NOON PST MONDAY
Monday
A chance of showers, mainly before 10am. Mostly sunny, with a high near 61. Windy, with a north wind 25 to 35 mph, with gusts as high as 50 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Monday Night
Mostly clear, with a low around 45. Windy, with a north wind 25 to 30 mph increasing to 35 to 40 mph after midnight. Winds could gust as high as 55 mph.
Tuesday
Sunny, with a high near 63. Windy, with a north wind 30 to 35 mph decreasing to 25 to 30 mph in the afternoon. Winds could gust as high as 55 mph.
Tuesday Night
Clear, with a low around 46. Breezy

*CHINO HILLS:
WIND ADVISORY REMAINS IN EFFECT FROM 9 PM THIS EVENING TO NOONPST MONDAY
Monday
A slight chance of showers. Mostly sunny, with a high near 65. Northeast wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
Monday Night
Mostly clear, with a low around 43. Light east wind increasing to 10 to 15 mph in the evening. Winds could gust as high as 30 mph.
Tuesday
Sunny, with a high near 66. Breezy, with a northeast wind 15 to 25 mph, with gusts as high as 40 mph.
Tuesday Night
Clear, with a low around 41.

*COLTON:
WIND ADVISORY REMAINS IN EFFECT FROM 9 PM THIS EVENING TO NOONPST MONDAY
Monday
A slight chance of showers. Mostly sunny, with a high near 64. North wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 20%.
Monday Night
Mostly clear, with a low around 45. North wind 5 to 10 mph increasing to 15 to 20 mph in the evening. Winds could gust as high as 30 mph.
Tuesday
Sunny, with a high near 67. Breezy, with a north wind 10 to 15 mph increasing to 20 to 25 mph in the afternoon. Winds could gust as high as 35 mph.
Tuesday Night
Clear, with a low around 43.

SAN BERNARDINO N.F. (CAZ255):
WINTER WEATHER ADVISORY IN EFFECT UNTIL 4 PM PST THIS AFTERNOON ABOVE 4500 FEET…
WIND ADVISORY IN EFFECT UNTIL 4 PM PST TUESDAY

*LAKE ARROWHEAD SCHOOL- AREA:
WINTER WEATHER ADVISORY IN EFFECT UNTIL 4 PM PST THIS AFTERNOON ABOVE 4500 FEET…
WIND ADVISORY IN EFFECT UNTIL 4 PM PST TUESDAY
Today
Snow showers likely, mainly before 10am. Areas of fog. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 44. Windy, with a north wind 20 to 30 mph, with gusts as high as 45 mph. Chance of precipitation is 60%. Total daytime snow accumulation of less than one inch possible.
Tonight
Mostly clear, with a low around 29. Windy, with a northeast wind 20 to 30 mph, with gusts as high as 45 mph.
Tuesday
Sunny, with a high near 47. Windy, with a north wind 25 to 30 mph, with gusts as high as 50 mph.
Tuesday Night
Mostly clear, with a low around 31. Northeast wind 10 to 15 mph, with gusts as high as 25 mph.

*BIG BEAR SCHOOL AREA:
WINTER WEATHER ADVISORY IN EFFECT UNTIL 4 PM PST THIS AFTERNOON ABOVE 4500 FEET…
WIND ADVISORY IN EFFECT UNTIL 4 PM PST TUESDAY
Today
Snow showers. Areas of fog. High near 37. Northeast wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 80%. Total daytime snow accumulation of 1 to 3 inches possible.
Tonight
Mostly clear, with a low around 20. North wind 15 to 20 mph, with gusts as high as 30 mph.
Tuesday
Sunny, with a high near 41. North wind 15 to 20 mph, with gusts as high as 30 mph.
Tuesday Night
Mostly clear, with a low around 20. North wind 15 to 20 mph becoming east 5 to 10 mph after midnight. Winds could gust as high as 30 mph.

BANNING PASS (CAZ265):
.TODAY… Sky/weather………Mostly cloudy. Showers in the morning, then showers likely in the afternoon.
Max temperature…..63 to 68. 24 HR TREND……Little change.
Min humidity……..20 to 30 percent. 24 HR TREND……Down 10 percent.
WIND (20 FT)……..Winds north 6 to 15 mph with gusts to 30 mph.
CWR (>0.10 IN)……61 percent. LAL……………..1.

.TONIGHT… Sky/weather………Partly cloudy. Chance of showers in the evening.
Min temperature…..42 to 49. 24 HR TREND……Down 2 degrees.
Max humidity……..35 to 45 percent. 24 HR TREND……Down 25 percent.
WIND (20 FT)……..Winds northwest 11 to 21 mph with gusts to 40 mph.
CWR (>0.10 IN)……2 percent. LAL……………..1.

.TUESDAY… Sky/weather………Sunny.
Max temperature…..64 to 69. 24 HR TREND……Up 3 degrees.
Min humidity……..10 percent. 24 HR TREND……Down 10 percent.
WIND (20 FT)……..Winds north 11 to 21 mph with gusts to 40 mph.
CWR (>0.10 IN)……0 percent. LAL……………..1.

JOSHUA TREE AREA (CAZ230):
WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 4 AM TO 4 PM PST MONDAY
TODAY… * Sky/weather…………………Mostly cloudy. Rain and snow in the morning becoming rain likely and slight chance of thunderstorms in the afternoon.
* Max Temperature……………..49-61. * 24 hr trend………………Little change.
* Min Humidity………………..32-42 pct. * 24 hr trend………………5 pct wetter.
* Winds – 20 foot…Slope/Valley..North 10 to 20 mph. Gusts up to 30 mph.
* Winds…10000 FT MSL…………East 30 to 40 mph.
* Chance of Precip…….90 percent. * CWR (>= 0.10 IN)…….60 percent. * LAL…1 in the morning becoming 2 in the afternoon.
* Haines High Level Index………3 very low potential for large plume dominated fire growth.

.TONIGHT… * Sky/weather….Partly cloudy in the evening becoming clear after midnight. Chance of rain in the evening.
* Min Temperature……………..35-44. * 24 hr trend………………Little change.
* Max Humidity………………..42-53 pct. * 24 hr trend………………19 pct drier.
* Winds – 20 foot…Slope/Valley..North 10 to 20 mph.
* Winds…10000 FT MSL…………North 35 to 45 mph.
* Chance of Precip…………….30 percent in the evening becoming 0 percent after midnight.
* CWR (>= 0.10 IN)…………….0 percent. * LAL………………………..1.

.TUESDAY… * Sky/weather…………………Sunny.
* Max Temperature……………..50-61. * 24 hr trend………………Little change.
* Min Humidity………………..14-19 pct. * 24 hr trend………………21 pct drier.
* Winds – 20 foot…Slope/Valley..North 15 to 25 mph. Strong gusts possible early in the morning.
* Winds…10000 FT MSL…………North 45 to 55 mph in the morning becoming 35 to 45 mph in the afternoon.
* 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.

NEEDLES, RIVER BAT. (CAZ229):
.TODAY… * Sky/Weather………Mostly sunny. Scattered rain in the morning. Scattered showers and isolated thunderstorms in the afternoon.
* Max temperature: * Valley floor….65-70. * 24 hr trend…..Little change.
* Min humidity: * Valley floor….17-27 percent. * 24 hr trend…..On average down 5 percent.
* Wind (Slope/valley=20 ft, 10 min avg):
* Valley floor….North wind 10 to 15 mph with gusts to around 30 mph.
* 10000 ft msl….East 15 to 25 mph.
* CWR (>= 0.10 in)….5 percent. * LAL……………..2. * Haines Index……..4.
* Mixing height…….3200 ft agl. * Transport winds…..North 15 to 20 knots. * Ventilation………Good.

.TONIGHT… * Sky/Weather………Partly cloudy. Scattered rain.
* Min temperature: * Valley floor….36-41. * 24 hr trend…..On average down 3 degrees.
* Max humidity: * Valley floor….36-41 percent. * 24 hr trend…..On average down 19 percent.
* Wind (Slope/valley=20 ft, 10 min avg):
* Valley floor….North wind 15 to 25 mph with gusts to around 40 mph.
* 10000 ft msl….Northeast 20 to 30 mph increasing to 35 to 45 mph after midnight.
* CWR (>= 0.10 in)….5 percent. * LAL……………..1. * Haines Index……..5.

.TUESDAY… * Sky/Weather………Sunny.
* Max temperature: * Valley floor….61-66. * 24 hr trend…..On average down 4 degrees.
* Min humidity: * Valley floor….11-19 percent. * 24 hr trend…..On average down 7 percent.
* Wind (Slope/valley=20 ft, 10 min avg):
* Valley floor….North wind 10 to 20 mph with gusts to around 35 mph.
* 10000 ft msl….Northeast 35 to 45 mph decreasing to 25 to 35 mph in the afternoon.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1. * Haines Index……..4.
* Mixing height…….5400 ft agl. * Transport winds…..North 15 to 20 knots. * Ventilation………Very good.

STATELINE – CLARK COUNTY BORDER (NVZ465):
.TODAY… * Sky/Weather………Sunny.
* Max temperature: * 4000 feet…….59-64. * 24 hr trend…..On average up 6 degrees.
* Min humidity: * 4000 feet…….12-20 percent. * 24 hr trend…..On average down 14 percent.
* Wind (slope/valley=20 ft, 10 min avg):
* Slope/valley….North winds 10 to 15 mph with gusts to around 30 mph.
* 10000 ft msl….Northeast 20 to 30 mph.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1. * Haines Index……..4.
* Mixing height…….4300 ft agl. * Transport winds…..North 10 to 15 knots.
* Ventilation………Good.

.TONIGHT… * Sky/Weather………Mostly clear.
* Min temperature: * 4000 feet…….30-35. * 24 hr trend…..Little change.
* Max humidity: * 4000 feet…….38-43 percent. * 24 hr trend…..On average down 13 percent.
* Wind (slope/valley=20 ft, 10 min avg):
* Slope/valley….North winds 10 to 20 mph with gusts to around 40 mph.
* 10000 ft msl….North 30 to 40 mph increasing to 40 to 50 mph after midnight.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1. * Haines Index……..5.

.TUESDAY… * Sky/Weather………Sunny.
* Max temperature: * 4000 feet…….55-60. * 24 hr trend…..On average down 4 degrees.
* Min humidity: * 4000 feet…….11-16 percent. * 24 hr trend…..On average down 2 percent.
* Wind (slope/valley=20 ft, 10 min avg):
* Slope/valley….North winds 10 to 20 mph with gusts to around 35 mph.
* 10000 ft msl….Northeast 35 to 45 mph becoming north 25 to 35 mph in the afternoon.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1. * Haines Index……..4.
* Mixing height…….4800 ft agl. * Transport winds…..North 10 to 15 knots. * Ventilation………Very good.

*La Jolla CA
Monday
A chance of showers, mainly before 5pm. Partly sunny, with a high near 58. Northeast wind 5 to 10 mph becoming west in the afternoon. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.
Monday Night
A slight chance of showers before 11pm. Partly cloudy, with a low around 47. West wind around 5 mph becoming calm. Chance of precipitation is 20%.
Tuesday
Sunny, with a high near 62. East wind 5 to 10 mph becoming light and variable.
Tuesday Night
Mostly clear, with a low around 48.

*Poway CA
Monday
Showers likely, mainly before 10am. Partly sunny, with a high near 61. Calm wind becoming northwest around 5 mph in the afternoon. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Monday Night
A slight chance of showers before 10pm. Partly cloudy, with a low around 42. Southeast wind 5 to 10 mph. Chance of precipitation is 20%.
Tuesday
Sunny, with a high near 69. East wind 5 to 10 mph becoming light and variable. Winds could gust as high as 20 mph.
Tuesday Night
Mostly clear, with a low around 42.

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

Canyon winds across outlying Dixie will strengthen Monday evening
into Tuesday morning. Easterly canyon winds along the Wasatch may
develop during this period as well, but will not be as strong.

Today
Sunny, with a high near 40. North wind 7 to 14 mph.
Tonight
Mostly clear, with a low around 15. North northeast wind around 14 mph.
Tuesday
Sunny, with a high near 37. Wind chill values as low as zero. North northeast wind around 14 mph.
Tuesday Night
Mostly clear, with a low around 16. East northeast wind 3 to 8 mph.

*************************** L.A COUNTY ********************************
LOS ANGELS CO. SAN GABRIEL VALLEY (CAZ548):
Monday
A 20 percent chance of showers before 10am. Sunny, with a high near 70. Windy, with a north northeast wind 20 to 30 mph becoming south 5 to 10 mph. Winds could gust as high as 40 mph.
Monday Night
Clear, with a low around 48. Northwest wind 5 to 10 mph becoming southeast after midnight.
Tuesday
Sunny, with a high near 71. East northeast wind 5 to 15 mph becoming southwest in the morning. Winds could gust as high as 20 mph.
Tuesday Night
Clear, with a low around 46.

ANGELES NATIONAL FOREST (CAZ254):
WINTER STORM WARNING NOW IN EFFECT UNTIL 3 PM PST MONDAY
HIGH WIND WATCH IN EFFECT FROM THIS EVENING THROUGH TUESDAY MORNING
Monday
A 40 percent chance of snow showers before 10am. Sunny, with a high near 47. Wind chill values as low as 20 early. Windy, with a north northeast wind 25 to 30 mph, with gusts as high as 45 mph. New snow accumulation of less than a half inch possible.
Monday Night
Clear, with a low around 40. Wind chill values as low as 30. Windy, with a north wind 25 to 30 mph increasing to 30 to 35 mph after midnight. Winds could gust as high as 55 mph.
Tuesday
Sunny, with a high near 53. Southeast wind 10 to 15 mph becoming northeast in the morning. Winds could gust as high as 25 mph.
Tuesday Night
Clear, with a low around 45.

ANTELOPE VALLEY (CAZ259):
Monday
A 30 percent chance of showers before 10am. Partly sunny, then gradually becoming sunny, with a high near 57. Wind chill values as low as 25 early. Breezy, with a northeast wind 15 to 20 mph, with gusts as high as 30 mph.
Monday Night
Clear, with a low around 33. Wind chill values as low as 25. Northwest wind 5 to 10 mph becoming east southeast after midnight.
Tuesday
Sunny, with a high near 61. Breezy, with a northeast wind 10 to 15 mph increasing to 20 to 25 mph in the morning. Winds could gust as high as 35 mph.
Tuesday Night
Clear, with a low around 33. Breezy.

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THIS DAY IN WEATHER HISTORY:
2002: Santa Ana winds started on 2/8 and ended on this day. A gust of 80 mph was measured at Descanso, 78 mph at Fremont Canyon and 76 mph in San Bernardino. A fire developed in the Fallbrook area.

2001: Over a week of heavy snow that started on 2/6 and ended on 2/14 continued on this day. The snowfall was called “most in a decade.” Five feet fell at Blue Jay and Mountain High, two feet at Snow Summit, and five to 12 inches at Apple Valley. The roof of an ice rink caved in at Blue Jay. On this day a waterspout was observed two miles west of La Jolla and a funnel cloud was observed three miles northwest of La Jolla

2000: Heavy rain caused flash flooding and mudslides that killed three and injured eight.

1999: A period of Santa Ana winds began on this day and ended on 2/12. Gusts of 85 mph were measured at Rialto, gusts to 80 mph were reported from Interstate 8, closing it.

1993: Heavy rain that started on 2/7 and ended on this day brought one to five

inches of rainfall near the coast, up to ten inches of precipitation to the mountains and 0.5 to 1.5 inches in the deserts. Eight to 18 inches of snow fell in the mountains. Widespread flooding occurred.

1992: A series of many intense storms started on 2/5 and ended on 2/16. The storms brought a total of 20+ inches of precipitation to the mountains and eight to16+ inches to lower elevations. Two were killed in an avalanche at Mt. Baldy. Flash flooding, mud slides, and road closures also occurred.

1988: Record heat hit the region on this day and on 2/11. The 92° reading at San Juan Capistrano was the nation’s high for the date. It was 90° at Lemon Grove, 88° at LA and Escondido. On 2/11 it was 83° in San Diego, 87° in many locations around San Diego.

1978:
An F3 tornado in Huntington Beach injured six and caused $3 million in property damage. This is one of only two F3 tornadoes to have been recorded in California. Another tornado hit El Segundo, hurling trees onto parked cars. Also, power poles were knocked down along a one mile path. A powerful Pacific storm brought coastal winds measured as high as 92 mph. Storm wind damage was severe at area harbors. The Port of Los Angeles was closed for ten hours until debris clogging the port could be cleared. In Oceanside 70 mph winds ripped a bait shop from the municipal pier. Heavy rain that began on 2/8 ended on this day. 16.4 inches fell at Lytle Creek, 13.64 inches at Lake Arrowhead, 11.97 inches in Wrightwood, 11.15 inches in Devore, 10.4 inches at Santiago Peak, 8.5 inches in Crestline, 5 inches in Ontario, 4.79 inches in Big Bear Lake, and 3.83 inches in Santa Ana. 20 were killed all over Southern California, 13 of them in Hidden Springs in the San Gabriel Mountains where a 15 foot wall of water devastated the town. Widespread flooding, flash flooding, and mud slides resulted, and numerous homes washed away.

1976: A heavy rain period that began on 2/4 ended on this day. 4.30 inches of rain fell in San Diego. Strong storm winds hit 64 mph at Palmdale.

1973: Heavy rain that began on this day ended on 2/11. One to two inches of rainfall hit the coast, three to seven inches fell in the coastal valleys, and up to 12 inches fell at Mts. Wilson and Baldy. Six inches in six hours was recorded at Mt. Wilson on 2/11. Flooding and mud slides closed many roads. Strong storm winds started on this day and ended on 2/11. Winds of 57 mph were recorded at Riverside and 46 mph at Newport Beach. Some 200 trees were uprooted in Pacific Beach alone.

1963: A strong winter storm hit the region with heavy rain on 2/9 and ended on 2/11. Many homes and highways were flooded. Slides blocked all mountain highways, some with large boulders. High surf caused damage to coastal homes and structures.
==================================================================
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.

======================================================================
CURRENT WEATHER @ HESP. @ 0815 Hrs. TEMP: 410 RH: 74% WIND: CALM
3.21” RF @ HESP. STA.SINCE OCT. 1st/20 Yr Avg: 7.12” : MONTH: 0.00” YTD S/F: 4.50” /
=================================================================
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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