WEATHER 3/12/19

DAILY FIRE WEATHER & FIRE INFO
To: ALL UNITS From:
EMAIL: pdupree@bdcecs.org
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Date: 3/12/19

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.:00

National Preparedness Level (PL 1 )

Southern California Area Preparedness Level: (PL 2 )

Northern California Area Preparedness Level (PL 1 )

SYNOP: (NWS SAN DIEGO)
Upper level low pressure over northwest Mexico early this morning will move into Arizona today with decreasing showers. A fast moving low pressure system from north will bring stronger onshore flow for tonight and early Wednesday with stronger and gusty west to northwest winds across the coastal waters and along and near the desert slopes of the mountains. There could also be some mostly light showers tonight with the greatest coverage in San Diego County. Dry weather will then prevail into next Monday with periods of weak to occasional moderate strength offshore flow with
gusty northeast winds along and near the coastal slopes of the mountains and below passes and canyons. There will be slow warming for Thursday and Friday, with greater warming taking high temperatures above average for the weekend.

NWS LAS VEGAS SYNOP– (NORTH & EAST OF COUNTY)
A cold front will bring strong northwest winds to much of the area tonight and Wednesday, along with colder temperatures and a final round of showers. High pressure will then build in, bringing a period of dry weather with temperatures climbing above normal by the weekend into early next week.

DAILY FUELS/FIRE POTENTIAL:
No large fire activity is anticipated across the region through the forecast period.

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

————————————————————————————–
APPLE VALLEY / HESPERIA-VICTOR VALLEY (CAZ260):
WIND ADVISORY IN EFFECT FROM 6 PM THIS EVENING TO 6 AM PDT WEDNESDAY

TODAY… Sky/weather………Mostly cloudy…becoming partly cloudy. Chance of showers in the morning, then slight chance of showers in the afternoon.
Max temperature…..59 to 64. 24 HR TREND……Up 9 degrees.
Min humidity……..30 to 40 percent. 24 HR TREND……Down 5 percent.
WIND (20 FT)……..Winds north 6 to 8 mph becoming west 7 to 17 mph with gusts to 35 mph in the afternoon.
CWR (>0.10 IN)……19 percent. LAL……………..1.

.TONIGHT… Sky/weather………Mostly clear.
Min temperature…..36 to 41. 24 HR TREND……Down 4 degrees.
Max humidity……..70 to 80 percent. 24 HR TREND……Little change.
WIND (20 FT)……..Winds west 14 to 24 mph with gusts to 45 mph.
CWR (>0.10 IN)……1 percent. LAL……………..1.

.WEDNESDAY… Sky/weather………Mostly sunny.
Max temperature…..53 to 58. 24 HR TREND……Down 6 degrees.
Min humidity……..20 to 30 percent. 24 HR TREND……Down 5 percent.
WIND (20 FT)……..Winds north 6 to 13 mph with gusts to 25 mph.
CWR (>0.10 IN)……0 percent. LAL……………..1.

WRIGHTWOOD:
WINTER STORM WARNING IN EFFECT UNTIL NOON PDT TUESDAY ABOVE 5500 FEET
Tuesday
A chance of snow. Areas of fog. Otherwise, mostly sunny, with a high near 46. North wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 50%. Little or no snow accumulation expected.
Tuesday Night
Mostly clear, with a low around 31. Windy, with a west wind 20 to 25 mph increasing to 25 to 30 mph. Winds could gust as high as 50 mph.
Wednesday
Sunny, with a high near 43. North wind 10 to 20 mph, with gusts as high as 30 mph.
Wednesday Night
Mostly clear, with a low around 27.

BIG PINES / WEST WRIGHTWOOD AREA
WINTER STORM WARNING IN EFFECT UNTIL NOON PDT TUESDAY
Tuesday
Snow likely, mainly before 11am. Mostly cloudy, then gradually becoming sunny, with a high near 47. Breezy, with a north wind 15 to 20 mph becoming west northwest in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 60%. New snow accumulation of 1 to 3 inches possible.
Tuesday Night
Mostly clear, with a low around 29. Breezy, with a west wind 20 to 25 mph, with gusts as high as 40 mph.
Wednesday
Sunny, with a high near 42. Breezy, with a north wind around 20 mph, with gusts as high as 30 mph.
Wednesday Night
Clear, with a low around 30. Blustery.

PHELAN:
WIND ADVISORY IN EFFECT FROM 6 PM THIS EVENING TO 6 AM PDT WEDNESDAY
Tuesday
A chance of rain, mainly before 11am. Mostly sunny, with a high near 52. Northwest wind 5 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday Night
Mostly clear, with a low around 35. Breezy, with a west wind 15 to 20 mph increasing to 20 to 25 mph in the evening. Winds could gust as high as 35 mph.
Wednesday
Sunny, with a high near 49. Northwest wind 10 to 15 mph becoming north in the morning. Winds could gust as high as 25 mph.
Wednesday Night
Mostly clear, with a low around 30.

TRONA:
WIND ADVISORY IN EFFECT FROM 6 PM TUESDAY TO 4 PM PDT WEDNESDAY
Tuesday
Sunny, with a high near 69. North wind 8 to 13 mph becoming light and variable. Winds could gust as high as 21 mph.
Tuesday Night
Clear, with a low around 45. West southwest wind 11 to 18 mph becoming north northwest after midnight. Winds could gust as high as 24 mph.
Wednesday
Sunny, with a high near 63. North wind 10 to 16 mph.
Wednesday Night
Clear, with a low around 41. North wind 6 to 14 mph.

BARSTOW / DAGGETT / BAKER / FT. IRWIN (CAZ228):
WIND ADVISORY IN EFFECT FROM 6 PM TUESDAY TO 4 PM PDT WEDNESDAY
TODAY… * Sky/Weather………Mostly cloudy. Scattered showers in the morning. Isolated showers in the afternoon.
* Max temperature: * Valley floor….66-71. * 24 hr trend…..On average up 4 degrees.
* Min humidity: * Valley floor….29-39 percent. * 24 hr trend…..On average up 4 percent.
* Wind (Slope/valley=20 ft, 10 min avg):
* Valley floor….West wind up to 10 mph. Gusts up to 25 mph in the afternoon.
* 10000 ft msl….East 15 to 20 mph becoming north 10 to 15 mph in the afternoon.
* CWR (>= 0.10 in)….25 percent decreasing to 10 percent in the afternoon. * LAL……………..1.
* Haines Index……..3.

.TONIGHT… * Sky/Weather………Partly cloudy.
* Min temperature: * Valley floor….37-42. * 24 hr trend…..On average down 4 degrees.
* Max humidity: * Valley floor….56-61 percent. * 24 hr trend…..On average down 27 percent.
* Wind (Slope/valley=20 ft, 10 min avg):
* Valley floor….West wind 10 to 15 mph with gusts to around 35 mph.
* 10000 ft msl….Northwest 15 to 25 mph increasing to west 30 to 40 mph after midnight.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1.
* Haines Index……..5.

.WEDNESDAY… * Sky/Weather………Sunny.
* Max temperature: * Valley floor….61-66. * 24 hr trend…..On average down 5 degrees.
* Min humidity: * Valley floor….11-19 percent. * 24 hr trend…..On average down 19 percent.
* Wind (Slope/valley=20 ft, 10 min avg):
* Valley floor….Northwest wind 15 to 25 mph with gusts to around 45 mph.
* 10000 ft msl….Northwest 40 to 50 mph increasing to 50 to 60 mph in the afternoon.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1.
* Haines Index……..5.’

BAKER:
WIND ADVISORY IN EFFECT FROM 6 PM TUESDAY TO 4 PM PDT WEDNESDAY
Tuesday
Mostly sunny, with a high near 69. West northwest wind 5 to 8 mph.
Tuesday Night
Clear, with a low around 46. Breezy, with a southwest wind 10 to 15 mph becoming northwest 18 to 23 mph after midnight.
Wednesday
Sunny, with a high near 65. Breezy, with a north northwest wind 20 to 25 mph, with gusts as high as 31 mph.
Wednesday Night
Clear, with a low around 38. North northwest wind 8 to 17 mph, with gusts as high as 24 mph.

SOUTHERN OWENS VALLEY / EAST SIERRA FOOTHILLS:
WIND ADVISORY IN EFFECT FROM 6 PM TUESDAY TO 4 PM PDT WEDNESDAY
TODAY…
* Sky/Weather………Mostly sunny.
* Max temperature: * Valley floor….61-66. * 7000 feet…….44-49. * 24 hr trend…..On average up 5 degrees.
* Min humidity: *Valley floor…20-29 percent. * 7000 feet…37-47 percent. * 24 hr trend….On average down 7 percent.
* Wind (slope/valley=20 ft, 10 min avg):
* Slope/valley….Upslope/upvalley 4 to 8 mph becoming west up to 10 mph in the afternoon. Gusts up to 25 mph.
* Upper slopes….Southwest winds up to 10 mph with gusts to around 25 mph shifting to the west with gusts to around 65 mph in the afternoon.
* 10000 ft msl….Northeast 10 to 20 mph shifting to the northwest 10 to 15 mph in the afternoon.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1.
* Haines Index……..3.

.TONIGHT… * Sky/Weather………Partly cloudy.
* Min temperature: * Valley floor….31-36. * 7000 feet…….1-6. * 24 hr trend…..On average down 2 degrees.
* Max humidity: * Valley floor….50-55 percent. * 7000 feet…62-67 percent. * 24 hr trend…..On average down 14 percent.
* Wind (slope/valley=20 ft, 10 min avg):
* Slope/valley….Northwest winds 10 to 15 mph.
* Upper slopes….Windy. Northwest winds 20 to 30 mph. Gusts up to 65 mph decreasing to 45 mph after midnight.
* 10000 ft msl….Northwest 20 to 30 mph increasing to 25 to 35 mph after midnight.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1.
* Haines Index……..3.

.WEDNESDAY… * Sky/Weather………Sunny.
* Max temperature: * Valley floor….56-61. * 7000 feet…….39-44. * 24 hr trend…..On average down 5 degrees.
* Min humidity: * Valley floor..16-23 percent. * 7000 feet…30-40 percent. * 24 hr trend…On average down 6 percent.
* Wind (slope/valley=20 ft, 10 min avg):
* Slope/valley….North winds 10 to 20 mph with gusts to around 35 mph.
* Upper slopes….Northwest winds 15 to 25 mph with gusts to around 45 mph.
* 10000 ft msl….Northwest 40 to 50 mph.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1.
* Haines Index……..4.

INLAND EMPIRE (CAZ248):
.TODAY… Sky/weather………Partly cloudy. Chance of showers in the morning, then slight chance of showers in the afternoon.
Max temperature…..60 to 70. 24 HR TREND……Up 5 degrees.
Min humidity……..35 to 45 percent. 24 HR TREND……Up 5 percent.
WIND (20 FT)……..Winds north 6 to 10 mph with gusts to 20 mph becoming west 6 to 13 mph with gusts to 30 mph in the afternoon.
CWR (>0.10 IN)……24 percent. LAL……………..1.

.TONIGHT… Sky/weather………Partly cloudy…becoming mostly cloudy. Slight chance of showers.
Min temperature…..40 to 48. 24 HR TREND……Down 1 degree.
Max humidity……..85 to 95 percent. 24 HR TREND……Little change.
WIND (20 FT)……..Winds south 6 to 13 mph. Gusts to 30 mph.
CWR (>0.10 IN)……10 percent. LAL……………..1.

.WEDNESDAY… Sky/weather………Partly cloudy…becoming mostly sunny.
Max temperature…..60 to 68. 24 HR TREND……Down 2 degrees.
Min humidity……..25 to 35 percent. 24 HR TREND……Down 5 percent.
WIND (20 FT)……..Winds south 6 to 13 mph becoming northwest in the afternoon. Gusts to 30 mph.
CWR (>0.10 IN)……2 percent. LAL……………..1.

DEVORE:
Tuesday
A slight chance of rain before 11am. Mostly sunny, with a high near 64. Breezy, with a north wind 15 to 25 mph becoming northwest 5 to 10 mph in the afternoon. Winds could gust as high as 40 mph. Chance of precipitation is 20%.
Tuesday Night
Mostly clear, with a low around 45. Southwest wind 5 to 10 mph becoming northeast after midnight.
Wednesday
Sunny, with a high near 61. Breezy, with a north wind 10 to 15 mph increasing to 20 to 25 mph in the morning. Winds could gust as high as 40 mph.
Wednesday Night
Mostly clear, with a low around 42. Windy.

CHINO HILLS:
Tuesday
A slight chance of rain before 11am. Mostly sunny, with a high near 67. Light south wind becoming southwest 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 20%.
Tuesday Night
Mostly clear, with a low around 46. South wind 10 to 15 mph becoming light and variable after midnight. Winds could gust as high as 25 mph.
Wednesday
Sunny, with a high near 65. Northeast wind 5 to 10 mph becoming light and variable.
Wednesday Night
Mostly clear, with a low around 43.

COLTON:
Tuesday
A slight chance of rain before 11am. Mostly sunny, with a high near 68. Light and variable wind becoming north 5 to 10 mph in the morning. Winds could gust as high as 20 mph. Chance of precipitation is 20%.
Tuesday Night
Mostly clear, with a low around 48. Southwest wind 5 to 10 mph becoming light and variable. Winds could gust as high as 20 mph.
Wednesday
Sunny, with a high near 66. North wind 5 to 10 mph increasing to 15 to 20 mph in the morning. Winds could gust as high as 30 mph.
Wednesday Night
Mostly clear, with a low around 46.

SAN BERNARDINO N.F. (CAZ255/CAZ256):
WINTER STORM WARNING IN EFFECT UNTIL NOON PDT TUESDAY ABOVE 5500 FEET
.TODAY… Sky/weather………Mostly cloudy…becoming partly cloudy. Areas of fog in the morning, then patchy fog in the afternoon. Showers likely in the morning, then slight chance of showers in the afternoon.
Max temperature…..38 to 48 above 6000 feet to 47 to 54 below 6000 feet. 24 HR TREND……Up 3 degrees.
Min humidity…25 to 35 percent on desert slopes to 35 to 45 percent on coastal slopes. 24 HR TREND…Down 5 percent.
WIND (20 FT)……..
SLOPES………..Winds north 6 to 13 mph becoming west 6 to 16 mph in the afternoon. Gusts to 30 mph.
RIDGETOP………Winds northwest 11 to 21 mph. Gusts to 30 mph…becoming 40 mph in the afternoon.
CWR (>0.10 IN)……37 percent. LAL……………..1.

.TONIGHT… Sky/weather………Partly cloudy. Slight chance of showers.
Min temperature…..15 to 25 above 6000 feet to 26 to 36 below 6000 feet. 24 HR TREND……Up 2 degrees.
Max humidity..60 to 70 percent on desert slopes to 85 to 95 percent on coastal slopes. 24 HR TREND…Down 20 percent.
WIND (20 FT)……..
SLOPES………..Winds west 16 to 26 mph with gusts to 50 mph.
RIDGETOP………Winds west 23 to 33 mph with gusts to 60 mph.
CWR (>0.10 IN)……8 percent. LAL……………..1.

.WEDNESDAY… Sky/weather………Partly cloudy…becoming mostly sunny.
Max temperature…..38 to 48 above 6000 feet to 42 to 52 below 6000 feet. 24 HR TREND……Up 3 degrees.
Min humidity…25 to 35 percent on desert slopes to 30 to 40 percent on coastal slopes. 24 HR TREND…Down 20 percent.
WIND (20 FT)……..
SLOPES………..Winds north 13 to 23 mph with gusts to 45 mph.
RIDGETOP………Winds north 17 to 27 mph. Gusts to 50 mph…becoming 40 mph in the afternoon.
CWR (>0.10 IN)……1 percent. LAL……………..1.

LAKE ARROWHEAD SCHOOL- AREA:
WINTER STORM WARNING IN EFFECT UNTIL NOON PDT TUESDAY ABOVE 5500 FEET
Tuesday
A chance of rain and snow before 11am, then a slight chance of rain. Areas of fog. Otherwise, mostly sunny, with a high near 52. North wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.
Tuesday Night
Partly cloudy, with a low around 31. West wind 5 to 10 mph becoming north after midnight. Winds could gust as high as 20 mph.
Wednesday
Sunny, with a high near 49. Windy, with a northeast wind 20 to 30 mph, with gusts as high as 45 mph.
Wednesday Night
Mostly clear, with a low around 29. Blustery.

BIG BEAR SCHOOL AREA:
WINTER STORM WARNING IN EFFECT UNTIL NOON PDT TUESDAY ABOVE 5500 FEET
Tuesday
A chance of snow. Areas of fog. Otherwise, partly sunny, with a high near 41. North wind 10 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 50%. New snow accumulation of 1 to 2 inches possible.
Tuesday Night
Partly cloudy, with a low around 23. Breezy, with a southwest wind 15 to 25 mph, with gusts as high as 35 mph.
Wednesday
Sunny, with a high near 38. North wind 15 to 20 mph, with gusts as high as 30 mph.
Wednesday Night
Mostly clear, with a low around 18.

BANNING PASS:
WIND ADVISORY IN EFFECT FROM 6 PM THIS EVENING TO 6 AM PDT WEDNESDAY
.TODAY… Sky/weather………Partly cloudy. Chance of showers in the morning, then slight chance of showers in the afternoon.
Max temperature…..70 to 75. 24 HR TREND……Up 4 degrees.
Min humidity……..30 to 40 percent. 24 HR TREND……Up 5 percent.
WIND (20 FT)……..Winds northwest around 6 mph becoming west 6 to 16 mph with gusts to 30 mph in the afternoon.
CWR (>0.10 IN)……27 percent. LAL……………..1.

.TONIGHT… Sky/weather………Mostly clear.
Min temperature…..46 to 54. 24 HR TREND……Up 2 degrees.
Max humidity……..50 to 60 percent. 24 HR TREND……Down 20 percent.
WIND (20 FT)……..Winds west 15 to 25 mph with gusts to 50 mph.
CWR (>0.10 IN)……5 percent. LAL……………..1.

.WEDNESDAY… Sky/weather………Mostly sunny.
Max temperature…..69 to 74. 24 HR TREND……Little change.
Min humidity……..15 to 20 percent. 24 HR TREND……Down 15 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 (CAZ261):
WIND ADVISORY IN EFFECT FROM 3 AM PDT /3 AM MST/ TO 4 PM PDT /4 PM MST/ WEDNESDAY
TODAY… * Sky/weather…………………Partly sunny. Chance of showers in the morning.
* Max Temperature……………..53-65. * 24 hr trend………………4 degrees warmer.
* Min Humidity………………..42-54 pct. * 24 hr trend………………7 pct wetter.
* Winds – 20 foot…Slope/Valley..Northwest 5 to 15 mph.
* Winds…10000 FT MSL…………North 5 to 15 mph in the morning becoming northwest 15 to 25 mph in the afternoon.
* Chance of Precip…..40 percent in the morning becoming 0 percent in the afternoon. * CWR (>= 0.10 IN)…..0 percent.
* LAL………………………..1.
* Haines High Level Index………4 or low potential for large plume dominated fire growth.

.TONIGHT… * Sky/weather…………………Clear.
* Min Temperature……………..37-47. * 24 hr trend………………Little change.
* Max Humidity………………..63-79 pct. * 24 hr trend………………25 pct drier.
* Winds – 20 foot…Slope/Valley..West 10 to 20 mph.
* Winds…10000 FT MSL…………Northwest 35 to 45 mph in the evening becoming 45 to 55 mph after midnight.
* Chance of Precip…………….0 percent. * CWR (>= 0.10 IN)…………….0 percent. * LAL………………………..1.

.WEDNESDAY… * Sky/weather…………………Sunny.
* Max Temperature……………..49-62. * 24 hr trend………………3 degrees cooler.
* Min Humidity………………..15-24 pct. * 24 hr trend………………29 pct drier.
* Winds – 20 foot…Slope/Valley..Northwest 15 to 25 mph.
* Winds…10000 FT MSL…………Northwest 40 to 50 mph.
* Chance of Precip…………….0 percent. * CWR (>= 0.10 IN)…………….0 percent. * LAL………………………..1.
* Haines High Level Index………4 or low potential for large plume dominated fire growth.

NEEDLES, RIVER BAT. (CAZ229):
WIND ADVISORY IN EFFECT FROM 3 AM PDT /3 AM MST/ TO 4 PM PDT /4 PM MST/ WEDNESDAY
TODAY… * Sky/Weather………Mostly cloudy then becoming mostly sunny Scattered showers through the day.
* Max temperature: * Valley floor….65-70. * 24 hr trend…..Little change.
* Min humidity: * Valley floor….39-49 percent. * 24 hr trend…..On average up 16 percent.
* Wind (Slope/valley=20 ft, 10 min avg):
* Valley floor….Upslope/upvalley 4 to 8 mph.
* 10000 ft msl….East 10 to 15 mph.
* CWR (>= 0.10 in)….40 percent decreasing to 25 percent in the afternoon. * LAL……………..1.
* Haines Index……..3.
* Mixing height…….8800 ft agl.
* Transport winds…..North around 10 knots.
* Ventilation………Very good.

.TONIGHT… * Sky/Weather………Partly cloudy. Isolated showers in the evening. Scattered showers after midnight.
* Min temperature: * Valley floor….43-48. * 24 hr trend…..On average down 4 degrees.
* Max humidity: * Valley floor….65-70 percent. * 24 hr trend…..On average down 15 percent.
* Wind (Slope/valley=20 ft, 10 min avg):
* Valley floor….Southwest wind up to 10 mph.
* 10000 ft msl….West 10 to 15 mph increasing to 20 to 30 mph after midnight.
* CWR (>= 0.10 in)….5 percent increasing to 20 percent after midnight. * LAL……………..1.
* Haines Index……..3.

.WEDNESDAY… * Sky/Weather………Mostly sunny.
* Max temperature: * Valley floor….63-68. * 24 hr trend…..On average down 2 degrees.
* Min humidity: * Valley floor….12-20 percent. * 24 hr trend…..On average down 28 percent.
* Wind (Slope/valley=20 ft, 10 min avg):
* Valley floor….North wind 15 to 25 mph with gusts to around 45 mph.
* 10000 ft msl….Northwest 35 to 45 mph increasing to 40 to 50 mph in the afternoon.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1.
* Haines Index……..3.
* Mixing height…….9000 ft agl.
* Transport winds…..North 25 to 35 knots.
* Ventilation………Excellent.

STATELINE – CLARK COUNTY BORDER:
WIND ADVISORY IN EFFECT FROM 3 AM PDT /3 AM MST/ TO 4 PM PDT /4 PM MST/ WEDNESDAY
.TODAY… * Sky/Weather………Partly sunny. Isolated showers.
* Max temperature: * 4000 feet…….63-68. * 24 hr trend…..On average up 2 degrees.
* Min humidity: * 4000 feet…….33-43 percent. * 24 hr trend…..On average up 8 percent.
* Wind (slope/valley=20 ft, 10 min avg):
* Slope/valley….Upslope/upvalley 4 to 8 mph.
* 10000 ft msl….East 10 to 15 mph.
* CWR (>= 0.10 in)….5 percent. * LAL……………..1.
* Haines Index……..3.
* Mixing height…….7400 ft agl.
* Transport winds…..North around 10 knots in the morning becoming light.
* Ventilation………Fair to good.

.TONIGHT… * Sky/Weather………Partly cloudy. Isolated showers through the night. Isolated snow showers after midnight.
* Min temperature: * 4000 feet…….36-41. * 24 hr trend…..On average down 5 degrees.
* Max humidity: * 4000 feet…….59-64 percent. * 24 hr trend…..On average down 22 percent.
* Wind (slope/valley=20 ft, 10 min avg):
* Slope/valley….Southwest winds around 10 mph shifting to the west with gusts to around 35 mph after midnight.
* 10000 ft msl….West 10 to 15 mph increasing to northwest 20 to 30 mph after midnight.
* CWR (>= 0.10 in)….5 percent increasing to 20 percent after midnight. * LAL……………..1.
* Haines Index……..3.

.WEDNESDAY… * Sky/Weather………Mostly sunny.
* Max temperature: * 4000 feet…….56-61. * 24 hr trend…..On average down 7 degrees.
* Min humidity: * 4000 feet…….14-20 percent. * 24 hr trend…..On average down 21 percent.
* Wind (slope/valley=20 ft, 10 min avg):
* Slope/valley….Northwest winds 15 to 25 mph with gusts to around 45 mph.
* 10000 ft msl….North 35 to 45 mph.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1.
* Haines Index……..3.
* Mixing height…….8100 ft agl.
* Transport winds…..North 25 to 35 knots decreasing to 20 to 25 knots in the afternoon.
* Ventilation………Excellent.

*************************** OUT OF COUNTY ********************************
HEAVY SNOW LIKELY FOR THE SAN GABRIEL MOUNTAINS THROUGH
MIDDAY TUESDAY…

…WARMING AND DRYING TREND LIKELY FOR LATE THIS WEEK

LOS ANGELS CO. SAN GABRIEL VALLEY (CAZ247/CAZ249),
LOS ANGELES COUNTY SAN FERNANDO VALLEY:
TUESDAY… Sky/weather………Partly cloudy then becoming mostly sunny. Slight chance of rain in the morning.
Max temperature…..65-71. 24 hr trend……Up 3.
Min humidity……..30-50 percent. 24 hr trend……Little change.
20-foot winds…….North 6-12 mph with local gusts to 20 mph.
Marine layer……..None. LAL……………..1. CWR (>0.10 IN)……10 percent.

.TUESDAY NIGHT… Sky/weather………Mostly clear.
Min temperature…..44-50.
Max humidity……..80-95 percent except 70-95 percent in the hills.
20-foot winds…….Northwest to north 10-20 mph with local gusts to 30 mph.
LAL……………..1. CWR (>0.10 IN)……0 percent.

.WEDNESDAY… Sky/weather………Mostly sunny.
Max temperature…..62-70.
Min humidity……..30-45 percent except 20-35 percent in the hills.
20-foot winds…….North 10-20 mph with local gusts to 30 mph. Strongest in the hills.
LAL……………..1. CWR (>0.10 IN)……0 percent.

SANTA CLARITA VALLEY:
.TUESDAY… Sky/weather………Partly cloudy then becoming mostly sunny. Slight chance of rain in the morning.
Max temperature…..63-67. 24 hr trend……Up 5.
Min humidity……..30-40 percent. 24 hr trend……Little change.
20-foot winds…….North 6-12 mph with local gusts to 20 mph becoming northwest 10-20 mph in the afternoon.
Marine layer……..None. LAL……………..1. CWR (>0.10 IN)……10 percent.

.TUESDAY NIGHT… Sky/weather………Partly cloudy.
Min temperature…..41-46.
Max humidity……..80-100 percent.
20-foot winds…….Northwest 8-15 mph with gusts to 25 mph early increasing 15-25 mph with gusts to 30 mph late.
LAL……………..1. CWR (>0.10 IN)……0 percent.

.WEDNESDAY… Sky/weather………Mostly sunny.
Max temperature…..59-65.
Min humidity……..25-35 percent.
20-foot winds…….North 15-25 mph with gusts to 35 mph.
LAL……………..1. CWR (>0.10 IN)……0 percent.

SANTA MONICA MOUNTAINS RECREATIONAL AREA:
.TUESDAY… Sky/weather………Partly cloudy then becoming mostly sunny. Slight chance of rain in the morning.
Max temperature…..59-68. 24 hr trend……Up 3.
Min humidity……..40-55 percent except 50-65 percent coastal slopes. 24 hr trend……Little change.
20-foot winds…….
Valleys/lwr slopes…Northwest 15-25 mph with gusts to 35 mph.
Ridges/upr slopes….Northwest 15-30 mph with gusts to 45 mph.
Marine layer……..None. LAL……………..1. CWR (>0.10 IN)……10 percent.

.TUESDAY NIGHT… Sky/weather………Mostly clear.
Min temperature…..43-50.
Max humidity……..80-95 percent.
20-foot winds…….
Valleys/lwr slopes…Northwest 15-25 mph with gusts to 35 mph.
Ridges/upr slopes….Northwest 15-30 mph with gusts to 45 mph.
LAL……………..1. CWR (>0.10 IN)……0 percent.

.WEDNESDAY… Sky/weather………Mostly sunny.
Max temperature…..56-65.
Min humidity……..35-50 percent.
20-foot winds…….
Valleys/lwr slopes…North 15-25 mph with gusts to 35 mph.
Ridges/upr slopes….North 15-30 mph with gusts to 45 mph.
LAL……………..1. CWR (>0.10 IN)……0 percent.

ANGELES NATIONAL FOREST (CAZ253):
WINTER STORM WARNING IN EFFECT UNTIL NOON PDT TUESDAY
WIND ADVISORY IN EFFECT UNTIL 9 PM PDT THIS EVENING…
HIGH WIND WARNING REMAINS IN EFFECT FROM 9 PM THIS EVENING TO 8 AM PDT WEDNESDAY
.TUESDAY… Sky/weather………Partly cloudy then becoming mostly sunny. Chance of snow. Slight chance of rain. Slight chance of snow in the afternoon.
Max temperature…..56-65 low elevations to 46-54 higher elevations. 24 hr trend……Up 6.
Min humidity……..40-55 percent. 24 hr trend……Little change.
20-foot winds…….
Valleys/lwr slopes…North 15-25 mph with gusts to 35 mph becoming northwest 20-30 mph with gusts to 45 mph in the afternoon. Strongest through the I-5 Corridor.
Ridges/upr slopes….North 20-30 mph with gusts to 45 mph becoming northwest 15-25 mph with gusts to
35 mph late in the afternoon. Isolated gusts to 50 mph near Whitaker Peak.
Marine layer……..None. LAL……………..1. CWR (>0.10 IN)……10 percent.

.TUESDAY NIGHT… Sky/weather………Mostly clear then becoming partly cloudy.
Min temperature…..37-44 low elevations to 28-35 colder valleys and peaks.
Max humidity……..75-100 percent.
20-foot winds…….
Valleys/lwr slopes…West 20-30 mph with gusts to 45 mph in the evening becoming northwest 20-35 mph with gusts to 55 mph. Strongest through the I-5 Corridor.
Ridges/upr slopes….West 20-30 mph with gusts to 45 mph.
LAL……………..1. CWR (>0.10 IN)……0 percent.

.WEDNESDAY… Sky/weather………Mostly sunny.
Max temperature…..53-63 low elevations to 41-48 higher elevations.
Min humidity……..30-50 percent.
20-foot winds…….
Valleys/lwr slopes…North 20-30 mph with gusts to 45 mph becoming 10-20 mph with gusts to 25 mph in the afternoon. Strongest through the I-5 Corridor.
Ridges/upr slopes….North 20-30 mph with gusts to 45 mph. Isolated gusts to 50 mph near Whitaker Peak.
LAL……………..1. CWR (>0.10 IN)……0 percent.

ANTELOPE VALLEY (CAZ259):
HIGH WIND WARNING REMAINS IN EFFECT FROM 9 PM THIS EVENING TO 8 AM PDT WEDNESDAY
.TUESDAY… Sky/weather………Partly cloudy then becoming mostly sunny. Slight chance of rain in the morning.
Max temperature…..53-63. 24 hr trend……Up 5.
Min humidity……..35-50 percent. 24 hr trend……Little change.
20-foot winds…….North 6-12 mph becoming west to northwest 25-35 mph with gusts to 55 mph in the
afternoon. Strongest west valley.
Marine layer……..None. LAL……………..1. CWR (>0.10 IN)……10 percent.

.TUESDAY NIGHT… Sky/weather………Mostly clear.
Min temperature…..33-41.
Max humidity……..80-100 percent.
20-foot winds…….West to northwest 25-35 mph with gusts to 45 mph.
LAL……………..1. CWR (>0.10 IN)……0 percent.

.WEDNESDAY… Sky/weather………Mostly sunny.
Max temperature…..49-59.
Min humidity……..25-45 percent.
20-foot winds…….Northwest 20-30 mph with gusts to 40 mph becoming north 8-15 mph with gusts to 25 mph in the afternoon. Strongest west valley.
LAL……………..1. CWR (>0.10 IN)……0 percent.

KERN CO. DESERTS (CAZ298):
HIGH WIND WARNING IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 AM PDT WEDNESDAY
TUESDAY… Sky/weather………Mostly sunny.
Max Temperature…..58-63. 24 HR Trend……Up 3-5 degrees.
Min Humidity……..40-48 percent. 24 HR Trend……Little change.
20-Foot Winds…….Northwest 4-9 mph in the early morning increasing to west 10-20 mph by afternoon.
LAL……………..1.
Ventilation………Very good.
Mixing height…….6100 ft AGL.
Transport Winds…..North around 15 mph in the morning shifting to the northwest in the afternoon.
Chc Wetting Rain….0 percent.

.TUESDAY NIGHT… Sky/weather………Mostly clear.
Min Temperature…..35-40. 24 HR Trend……Down 2-4 degrees.
Max Humidity……..70-80 percent. 24 HR Trend……Up 2-4 percent.
20-Foot Winds…….West 12-20 mph.
LAL……………..1. Chc Wetting Rain….0 percent.

.WEDNESDAY… Sky/weather………Sunny.
Max Temperature…..55-60. 24 HR Trend……Down 3-5 degrees.
Min Humidity……..30-40 percent. 24 HR Trend……Down 3-5 percent.
20-Foot Winds…….Northwest 7-12 mph in the early morning becoming north 4-7 mph by afternoon.
LAL……………..1.
Ventilation………Very good.
Mixing height…….5900 ft AGL.
Transport Winds…..North 10 to 15 mph.
Chc Wetting Rain….0 percent.

La Jolla CA
Tuesday
A slight chance of rain before 11am. Mostly sunny, with a high near 60. North wind 5 to 15 mph becoming west in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 20%.
Tuesday Night
A slight chance of rain. Mostly cloudy, with a low around 53. West wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Wednesday
Mostly sunny, with a high near 60. South wind 5 to 10 mph, with gusts as high as 20 mph.
Wednesday Night
Mostly clear, with a low around 51.

Poway CA
Tuesday
A slight chance of rain before 11am. Mostly sunny, with a high near 64. North wind 5 to 15 mph becoming west in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 20%.
Tuesday Night
A slight chance of rain. Increasing clouds, with a low around 48. Southwest wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Wednesday
Mostly sunny, with a high near 66. South wind 5 to 10 mph becoming west in the afternoon.
Wednesday Night
Mostly clear, with a low around 46.

CEDAR CITY Ut.
WINTER WEATHER ADVISORY IN EFFECT FROM 10 PM THIS EVENING TO 10 PM MDT WEDNESDAY
WIND ADVISORY IN EFFECT FROM 10 PM THIS EVENING TO 6 PM MDT WEDNESDAY

DAYS TWO THROUGH SEVEN…Tuesday through Sunday

Accumulating snow to the valley floors is expected with a strong cold front passage late Tuesday night into Wednesday morning. Snow is expected to linger into Wednesday night before tapering off Thursday morning. Significant snow accumulations are possible for northwest flow favored mountain locations. Lake effect snow is
possible for the Salt Lake and Tooele valleys, which could result in localized significant accumulations. Travel disruptions are possible for both the Wednesday morning and evening commutes.

Tuesday
A slight chance of snow showers before noon, then a slight chance of rain showers. Partly sunny, with a high near 52. South wind around 6 mph becoming light and variable. Chance of precipitation is 20%.
Tuesday Night
A chance of rain showers before midnight, then snow. Low around 25. South southwest wind 7 to 15 mph. Chance of precipitation is 80%. New snow accumulation of around an inch possible.
Wednesday
A 50 percent chance of snow showers. Mostly cloudy, with a high near 30. North northwest wind 16 to 18 mph. New snow accumulation of less than one inch possible.
Wednesday Night
Partly cloudy, with a low around 17. North wind 11 to 17 mph.

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THIS DAY IN WEATHER HISTORY:
1996: A storm that started on this day and ended on 3/13 brought eight to 12 inches of snow to the San Bernardino Mountains.

1990: A funnel cloud was observed five miles south of Lindbergh Field.

1982: A thunderstorm produced lightning strikes and hail that piled up in La Mesa and along Interstate 8 near Pine Valley. Lightning smashed a huge hole in a La Mesa home, throwing a resident, breaking a window and burning carpet. Another bolt struck and splintered a nearby flagpole. Other strikes started a small fire in Alpine. Hail caused accidents along Interstate 8 in Pine Valley.

1969: It was -8° in Big Bear Lake, the lowest temperature on record for March.
1967: A series of storms brought heavy rain starting on 3/11 and ending on 3/14. Total precipitation was 8.52 inches in Lake Arrowhead and 8.06 inches in Lytle Creek. Only about one inch fell in the San Bernardino area during this time, and none in Victorville. The Mojave River flooded a couple of roads and washed out construction sites in the desert. Heavy snow fell in the higher mountains, up to two feet in Big Bear Lake. But only one inch at Lake Arrowhead and Idyllwild.

1941: A heavy storm hit the San Gabriel Mountains and Mojave Desert on this day through 3/14. Victorville received 1.78 inches. The Mojave River flooded homes in the Oro Grande Wash. In Wrightwood three houses were destroyed from a mudslide in Heath Canyon. Mud and debris six feet deep covered Lone Pine Road.
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TROPICAL EAST PACIFIC REPORT:
There are no tropical cyclones in the Eastern North Pacific at this time.

The Eastern North Pacific hurricane season runs from May 15th through November 30th..

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CURRENT WEATHER @ HESP. @ 0705 Hrs. TEMP: 430 RH: 96% WIND: N 3 G 11
7.23” RF @ HESP. STA.SINCE OCT. 1st/20 Yr Avg: 7.12” : MONTH: 1.08” YTD S/F: 1.00” /
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FIRES: UPDATED

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