WEATHER 3/11/19

DAILY FIRE WEATHER & FIRE INFO
To: ALL UNITS From:
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RADIO:(HAM) KG6ZHW
COUNTY F.D RADIO: #733784 CALL SIGN: COM-330

Date: 3/11/19

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.:03

National Preparedness Level (PL 1 )

Southern California Area Preparedness Level: (PL 2 )

Northern California Area Preparedness Level (PL 1 )

SYNOP: (NWS SAN DIEGO)
A low pressure system moving inland across northern Baja tonight and into southern Arizona Tuesday will bring periods of showers to portions of southwest California for late this morning into Tuesday morning with the most widespread showers with the greatest precipitation amounts for the mountains for tonight into early Tuesday. Another low pressure system moving southward through the western states will bring a slight chance of showers for late Tuesday night. Otherwise, dry weather with a warming trend will prevail for Thursday into next weekend with periods of stronger
and gusty northeast winds along and near the coastal slopes of the mountains and below passes and canyons.

Scattered showers will develop over Southern California from Los Angeles County southward this afternoon through Tuesday morning. The rest of the region will be dry.

· Most foothill and mountain locations will receive between a half inch and an inch of rainfall and most coastal and valley locations will receive less than a half inch of rainfall through Tuesday morning.

· The snow level will be between 5,000 and 6,000 feet.
· Northeast winds of 15 to 25 mph with gusts to 40 mph will surface across the mountains and below the canyons and passes of Southern California through Tuesday morning.

· It will be dry across the region Tuesday afternoon, but isolated showers with little or no rainfall accumulation will occur over the mountains Tuesday evening into Wednesday morning.

· West to northwest winds of 20 to 40 mph with gusts to 60 mph will surface across the mountain ridges and desert passes Tuesday evening into Wednesday morning.

· Winds will become light across the area Wednesday afternoon through Friday night.

· Maximum temperatures will be 5 to 10 degrees below normal through Wednesday, with 40s to low 50s across the mountains and mid 50s to mid 60s in the valleys.

· Temperatures will warm to near normal Thursday and Friday and then to 5 to 10 degrees above normal this weekend.

· The warmer valley locations will reach 80 degrees on Sunday.

· Local northeast to east winds of 10 to 20 mph with gusts to 35 mph will surface across the mountains and below the canyons and passes of Southern California Saturday morning through Sunday morning

WEATHER SUMMARY
A storm system will move down the coast and into northern Baja Monday into Tuesday. Moisture will wrap around the north side of the low and bring showers to the region through Tuesday night. Flash flooding is not expected. Maximum rainfall rates will be around 0.25″/hr, well below debris flow thresholds. Moderate to locally heavy snow will occur above 5000 􀅌. Strong west winds are also likely as the storm departs Tuesday into early Wednesday.

Confidence Level: Moderate
Rainfall
Impacts Hazardous travel due to wet roads
Details & Locations

Rainfall Amounts:
Coast/valleys: 0.20-0.50″, highest in San Diego County
Mountains: 0.50-1.00″, locally up to 1.50″ on the east facing slopes
Deserts: 0.20-0.50″

Timing
Isolated light showers through Monday afternoon, becoming heavier and more
widespread Monday night through Tuesday morning. Showers tapering off
Tuesday afternoon.

Snowfall
Impacts Hazardous travel in the mountains with snow-covered roads above 5000 FT
Reduced visibility in fog

Details & Locations
Snow levels near 4500 ft. tonight, rising to 5000 to 5500 ft.for Monday evening
through Tuesday.

Snowfall Amounts:
5000-6000 FT: 1-4″
Above 6000 FT: 5-10″, locally to 12″
Heaviest snow likely near Mount Laguna, Mount San Jacinto, and Big Bear

Timing
Isolated light showers through Monday afternoon, becoming heavier and more
widespread Monday night through Tuesday morning. Showers tapering off
Tuesday afternoon.

Strong Wind Tue-Wed
Impacts Hazardous travel for high profile vehicles on I-8 and I-10
Hazardous boating conditions, mainly over the outer coastal waters

Details & Locations
West winds with gusts 40-50 mph over portions of the San Diego and
Riverside County mountains and near the desert foothills
West-northwest winds with gusts 20-30 kt, possibly as high as 35 kt, over the
outer coastal waters

Timing Winds strengthening Tuesday afternoon, peaking Tuesday night through early
Wednesday morning before rapidly weakening late Wednesday morning.

NWS LAS VEGAS SYNOP– (NORTH & EAST OF COUNTY)
A series of low pressure systems will impact the region today through Thursday bringing scattered valley rain and mountain snow showers along with gusty winds at times. Temperatures
will remain below normal through much of the upcoming week. The end of the week will be dry with temperatures warming back to seasonal readings.

FORECAST DETAILS
Srn Nevada, SE California, NW Arizona
PRECIPITATION
MON-TUE
Trace-0 .10″ Clark, northern Mohave Coun_es.
0.10-0.30″ San Bernardino, far southern Clark, southern Mohave Counties.

SNOWFALL
TDA-TUE
Trace- 2″ northern Owens Valley, valleys of Esmeralda, central Nye, Lincoln and platueas of northern Mohave Counties.

2″-4″ between 6000′-8000′ mountains of Inyo, Esmeralda, central Nye Lincoln Counties, and Spring Mountains.
4″-7″ above 8000′ mountains of Inyo, Esmeralda, central Nye Lincoln Counties, and Spring Mountains.

WIND
TUE NGT-WED
Wind gusts 40-50 mph with cold frontal passage.

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):
TODAY… Sky/weather………Partly cloudy…becoming mostly cloudy. Slight chance of showers in the afternoon.
Max temperature…..54 to 59. 24 HR TREND……Up 3 degrees.
Min humidity……..30 to 40 percent. 24 HR TREND……Little change.
WIND (20 FT)……..Winds northeast 6 to 12 mph with gusts to 25 mph.
CWR (>0.10 IN)……15 percent. LAL……………..1.

.TONIGHT… Sky/weather………Cloudy. Chance of showers in the evening, then showers likely after midnight.
Min temperature…..39 to 44. 24 HR TREND……Up 4 degrees.
Max humidity……..70 to 80 percent. 24 HR TREND……Little change.
WIND (20 FT)……..Winds north 6 to 11 mph. Gusts to 25 mph in the evening.
CWR (>0.10 IN)……49 percent. LAL……………..1.

.TUESDAY… Sky/weather………Partly cloudy. Slight chance of showers in the morning.
Max temperature…..59 to 65. 24 HR TREND……Up 6 degrees.
Min humidity……..30 percent. 24 HR TREND……Down 5 percent.
WIND (20 FT)……..Winds north 6 to 8 mph becoming west 6 to 15 mph with gusts to 30 mph in the afternoon.
CWR (>0.10 IN)……13 percent. LAL……………..1.

WRIGHTWOOD:
WINTER STORM WARNING IN EFFECT FROM NOON MONDAY TO 2 PM PDT TUESDAY ABOVE 5000 FEET
Monday
A chance of snow showers. Areas of fog. Otherwise, cloudy, with a high near 39. Northeast wind 5 to 10 mph increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 40%. New snow accumulation of less than a half inch possible.
Monday Night
Snow showers likely. Areas of fog. Otherwise, cloudy, then gradually becoming partly cloudy, with a low around 32. North wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New snow accumulation of 1 to 3 inches possible.
Tuesday
A chance of snow showers. Areas of fog. Otherwise, mostly sunny, with a high near 47. North wind 10 to 20 mph becoming west in the afternoon. Winds could gust 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. Windy.

BIG PINES / WEST WRIGHTWOOD AREA
WINTER WEATHER ADVISORY EXTENDED UNTIL 11 AM PDT TUESDAY FOR THE LOS ANGELES COUNTY MOUNTAINS
Monday
A 40 percent chance of snow showers. Mostly cloudy, with a high near 40. Northeast wind 5 to 10 mph, with gusts as high as 15 mph. New snow accumulation of 1 to 2 inches possible.
Monday Night
A 50 percent chance of snow showers. Mostly cloudy, with a low around 31. North wind 10 to 15 mph, with gusts as high as 20 mph. New snow accumulation of 1 to 2 inches possible.
Tuesday
A 40 percent chance of snow showers. Partly sunny, with a high near 47. North wind 10 to 15 mph becoming west southwest in the morning. Winds could gust as high as 20 mph. New snow accumulation of around an inch possible.
Tuesday Night
Mostly cloudy, with a low around 29.

PHELAN:
Monday
A slight chance of rain and snow showers before 11am, then a chance of rain showers. Mostly cloudy, with a high near 49. West wind 5 to 10 mph becoming northeast 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.
Monday Night
Showers likely. Mostly cloudy, with a low around 37. North wind 10 to 15 mph decreasing to 5 to 10 mph in the evening. Winds could gust as high as 25 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday
A chance of showers, mainly before 11am. Mostly sunny, with a high near 55. Northwest wind 10 to 15 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday Night
Partly cloudy, with a low around 35. Breezy.

TRONA:
Monday
Partly sunny, with a high near 64. North wind 8 to 15 mph, with gusts as high as 21 mph.
Monday Night
Mostly cloudy, with a low around 46. Breezy, with a north wind 15 to 21 mph.
Tuesday
Sunny, with a high near 69. Northwest wind 5 to 15 mph becoming southwest in the afternoon. Winds could gust as high as 23 mph.
Tuesday Night
Mostly clear, with a low around 45. West southwest wind 14 to 16 mph becoming north northwest after midnight. Winds could gust as high as 23 mph.

BARSTOW / DAGGETT / BAKER / FT. IRWIN (CAZ228):
TODAY… * Sky/Weather………Partly cloudy then becoming mostly cloudy.
* Max temperature: * Valley floor….59-64. * 24 hr trend…..On average down 2 degrees.
* Min humidity: * Valley floor….24-34 percent. * 24 hr trend…..On average up 5 percent.
* Wind (Slope/valley=20 ft, 10 min avg):
* Valley floor….Southwest wind up to 10 mph.
* 10000 ft msl….Southwest 15 to 25 mph shifting to the south 15 to 20 mph in the afternoon.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1.
* Haines Index……..4.

.TONIGHT… * Sky/Weather………Mostly cloudy then becoming partly cloudy.
* Min temperature: * Valley floor….35-40. * 24 hr trend…..Little change.
* Max humidity: * Valley floor….71-76 percent. * 24 hr trend…..On average up 4 percent.
* Wind (Slope/valley=20 ft, 10 min avg):
* Valley floor….Southwest wind up to 10 mph shifting to the northwest after midnight.
* 10000 ft msl….South 10 to 15 mph shifting to the southeast 10 to 20 mph after midnight.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1.
* Haines Index……..4.

.MONDAY… * Sky/Weather………Partly cloudy. Isolated showers.
* Max temperature: * Valley floor….62-67. * 24 hr trend…..On average up 3 degrees.
* Min humidity: * Valley floor….26-36 percent. * 24 hr trend…..On average up 2 percent.
* Wind (Slope/valley=20 ft, 10 min avg):
* Valley floor….Northeast wind 10 to 15 mph.
* 10000 ft msl….Southeast 10 to 15 mph.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1.
* Haines Index……..3.

BAKER:
Monday
Partly sunny, with a high near 66. North wind 7 to 11 mph, with gusts as high as 20 mph.
Monday Night
A 30 percent chance of showers, mainly after 10pm. Mostly cloudy, with a low around 45. Northwest wind 7 to 10 mph.
Tuesday
Sunny, with a high near 70. North wind 5 to 7 mph becoming west in the afternoon.
Tuesday Night
Mostly clear, with a low around 46. West southwest wind 10 to 16 mph becoming northwest after midnight. Winds could gust as high as 24 mph.

SOUTHERN OWENS VALLEY / EAST SIERRA FOOTHILLS:
.TODAY… * Sky/Weather…Mostly cloudy. Scattered snow showers through the day. Scattered showers in the afternoon.
* Max temperature: * Valley floor….52-57. * 7000 feet…….33-38. * 24 hr trend…..On average down 3 degrees.
* Min humidity: * Valley floor….28-38 percent. * 7000 feet…54-64 percent. * 24 hr trend…..On average up 15 percent.
* Wind (slope/valley=20 ft, 10 min avg):
* Slope/valley….Upslope/upvalley 4 to 8 mph.
* Upper slopes….Upslope/upvalley 4 to 8 mph becoming southeast up to 10 mph in the afternoon.
* 10000 ft msl….Light and variable becoming south 10 to 15 mph in the afternoon.
* CWR (>= 0.10 in)….5 percent increasing to 35 percent in the afternoon. * LAL……………..1.
* Haines Index……..3.

.TONIGHT… * Sky/Weather………Mostly cloudy. Scattered snow showers and showers in the evening, then isolated snow showers after midnight.
* Min temperature: * Valley floor..30-35. * 7000 feet…Zero to 5 above zero. * 24 hr trend…On average down 2 degrees.
* Max humidity:
* Valley floor….75-80 percent. * 7000 feet…….84-89 percent. * 24 hr trend…..On average up 11 percent.
* Wind (slope/valley=20 ft, 10 min avg):
* Slope/valley….Downslope/downvalley 2 to 5 mph becoming northwest up to 10 mph after midnight.
* Upper slopes….Downslope/downvalley 2 to 5 mph.
* 10000 ft msl….South 10 to 20 mph becoming 15 to 20 mph after midnight.
* CWR (>= 0.10 in)….35 percent decreasing to 5 percent after midnight. * LAL……………..1.
* Haines Index……..3.

.MONDAY… * Sky/Weather………Partly cloudy then becoming mostly sunny. Isolated snow showers.
* Max temperature: * Valley floor….56-61. * 7000 feet…….37-42. * 24 hr trend…On average up 4 degrees.
* Min humidity: * Valley floor….24-32 percent. * 7000 feet…47-57 percent. * 24 hr trend…..On average down 5 percent.
* Wind (slope/valley=20 ft, 10 min avg):
* Slope/valley….North winds 10 to 15 mph. * Upper slopes….Northeast winds 10 to 15 mph.
* 10000 ft msl….Southeast 10 to 15 mph shifting to the northeast in the afternoon.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1.
* Haines Index……..3.

INLAND EMPIRE (CAZ248):
TODAY… Sky/weather………Mostly cloudy. Chance of showers in the afternoon.
Max temperature…..Around 65. 24 HR TREND……Up 2 degrees.
Min humidity……..30 to 40 percent. 24 HR TREND……Down 10 percent.
WIND (20 FT)……..Winds north 6 to 14 mph becoming east 6 to 13 mph in the afternoon. Gusts to 30 mph.
CWR (>0.10 IN)……19 percent. LAL……………..1.

.TONIGHT… Sky/weather………Mostly cloudy. Chance of showers in the evening, then showers likely after midnight.
Min temperature…..42 to 50. 24 HR TREND……Up 4 degrees.
Max humidity……..80 to 90 percent. 24 HR TREND……Little change.
WIND (20 FT)……..Winds northwest 6 to 9 mph becoming east after midnight. Gusts to 20 mph.
CWR (>0.10 IN)……48 percent. LAL……………..1.

.TUESDAY… Sky/weather………Partly cloudy. Chance of showers in the morning.
Max temperature…..61 to 71. 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 9 mph becoming west 6 to 12 mph in the afternoon. Gusts to 25 mph.
CWR (>0.10 IN)……15 percent. LAL……………..1.

DEVORE:
Monday
A slight chance of showers. Mostly cloudy, with a high near 60. Breezy, with a north wind 15 to 25 mph, with gusts as high as 35 mph. Chance of precipitation is 20%.
Monday Night
A chance of showers. Mostly cloudy, with a low around 45. Breezy, with a north wind 15 to 25 mph, with gusts as high as 35 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday
Mostly sunny, with a high near 63. North wind 15 to 20 mph becoming southwest in the afternoon. Winds could gust as high as 30 mph.
Tuesday Night
Partly cloudy, with a low around 43.

CHINO HILLS:
Monday
A slight chance of showers. Mostly cloudy, with a high near 64. East wind 5 to 10 mph increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 20%.
Monday Night
A chance of showers. Mostly cloudy, with a low around 47. Calm wind becoming east around 5 mph after midnight. Chance of precipitation is 40%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday
Mostly sunny, with a high near 65. East wind 5 to 10 mph becoming southwest 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph.
Tuesday Night
Partly cloudy, with a low around 45.

COLTON:
Monday
A slight chance of showers. Mostly cloudy, with a high near 64. Calm wind becoming east around 5 mph in the afternoon. Chance of precipitation is 20%.
Monday Night
A chance of showers. Cloudy, then gradually becoming partly cloudy, with a low around 49. Northeast wind 5 to 10 mph becoming light and variable in the evening. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday
Mostly sunny, with a high near 67. North wind 5 to 15 mph becoming west in the afternoon. Winds could gust as high as 20 mph.
Tuesday Night
Partly cloudy, with a low around 46.

SAN BERNARDINO N.F. (CAZ255/CAZ256):
WINTER STORM WARNING IN EFFECT FROM NOON MONDAY TO 2 PM PDT TUESDAY ABOVE 5000 FEET
TODAY… Sky/weather………Partly cloudy…becoming cloudy. Chance of showers in the afternoon.
Max temperature…..31 to 41 above 6000 feet to 41 to 48 below 6000 feet. 24 HR TREND……Up 6 degrees.
Min humidity……..45 to 55 percent. 24 HR TREND……Up 10 percent.
WIND (20 FT)……..
SLOPES………..Winds east 6 to 16 mph with gusts to 30 mph.
RIDGETOP………Winds east 8 to 18 mph with gusts to 35 mph.
CWR (>0.10 IN)……25 percent. LAL……………..1.

.TONIGHT… Sky/weather………Cloudy. Showers likely in the evening, then showers after midnight.
Min temperature…..18 to 28 above 6000 feet to 30 to 37 below 6000 feet. 24 HR TREND……Up 4 degrees.
Max humidity..80 to 90 percent on desert slopes to 85 to 95 percent on coastal slopes. 24 HR TREND……Little change.
WIND (20 FT)……..
SLOPES………..Winds northeast 6 to 14 mph with gusts to 30 mph.
RIDGETOP………Winds northeast 10 to 20 mph with gusts to 40 mph.
CWR (>0.10 IN)……80 percent. LAL……………..1.

.TUESDAY… Sky/weather………Mostly cloudy…becoming partly cloudy. Chance of showers in the morning.
Max temperature…39 to 49 above 6000 feet to 47 to 54 below 6000 feet. 24 HR TREND…Up 9 degrees.
Min humidity….25 to 35 percent on desert slopes to 35 to 45 percent on coastal slopes. 24 HR TREND..Little change.
WIND (20 FT)……..
SLOPES………..Winds north 6 to 14 mph becoming west 6 to 15 mph in the afternoon. Gusts to 30 mph.
RIDGETOP………Winds northwest 9 to 19 mph. Gusts to 30 mph…becoming 40 mph in the afternoon.
CWR (>0.10 IN)……26 percent. LAL……………..1.

LAKE ARROWHEAD SCHOOL- AREA:
WINTER STORM WARNING IN EFFECT FROM NOON MONDAY TO 2 PM PDT TUESDAY ABOVE 5000 FEET
Monday
A slight chance of snow showers before 11am, then a chance of rain and snow showers. Areas of fog. Otherwise, mostly cloudy, with a high near 46. Northeast wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.
Monday Night
Rain and snow showers likely. Areas of fog. Otherwise, cloudy, then gradually becoming partly cloudy, with a low around 32. North wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.
Tuesday
A slight chance of snow showers before 11am, then a slight chance of rain showers. Areas of fog. Otherwise, mostly sunny, with a high near 49. Northeast wind 15 to 20 mph becoming west 5 to 10 mph in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 20%.
Tuesday Night
Partly cloudy, with a low around 30. Light and variable wind becoming north 5 to 10 mph after midnight. Winds could gust as high as 20 mph.

BIG BEAR SCHOOL AREA:
WINTER STORM WARNING IN EFFECT FROM NOON MONDAY TO 2 PM PDT TUESDAY ABOVE 5000 FEET
. Monday
A chance of snow showers. Areas of fog. Otherwise, cloudy, with a high near 36. Northeast wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 50%. New snow accumulation of around an inch possible.
Monday Night
Snow showers. Areas of fog. Low around 27. Northeast wind 10 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New snow accumulation of 7 to 11 inches possible.
Tuesday
A chance of snow showers. Areas of fog. Otherwise, partly sunny, with a high near 43. Northeast wind 10 to 15 mph becoming west in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 40%. New snow accumulation of around an inch possible.
Tuesday Night
Partly cloudy, with a low around 23. Breezy, with a southwest wind 20 to 25 mph, with gusts as high as 40 mph.

BANNING PASS:
TODAY… Sky/weather………Mostly cloudy. Chance of showers in the afternoon.
Max temperature…..64 to 69. 24 HR TREND……Little change.
Min humidity……..30 to 40 percent. 24 HR TREND……Up 10 percent.
WIND (20 FT)……..Winds west 6 to 10 mph with gusts to 20 mph becoming east 6 to 8 mph in the afternoon.
CWR (>0.10 IN)……16 percent. LAL……………..1.

.TONIGHT… Sky/weather………Mostly cloudy. Showers likely in the evening, then showers after midnight.
Min temperature…..46 to 52. 24 HR TREND……Up 3 degrees.
Max humidity……..65 to 75 percent. 24 HR TREND……Up 10 percent.
WIND (20 FT)……..Variable 2 to 4 mph becoming northwest around 6 mph after midnight.
CWR (>0.10 IN)……74 percent. LAL……………..1.

.TUESDAY… Sky/weather………Partly cloudy. Chance of showers in the morning.
Max temperature…..72 to 77. 24 HR TREND……Up 6 degrees.
Min humidity……..25 to 35 percent. 24 HR TREND……Little change.
WIND (20 FT)……..Winds west 6 to 14 mph. Gusts to 30 mph in the afternoon.
CWR (>0.10 IN)……19 percent. LAL……………..1.

JOSHUA TREE AREA (CAZ261):
.TODAY… * Sky/weather…………………Mostly cloudy. Chance of showers in the afternoon.
* Max Temperature……………..48-62. * 24 hr trend………………Little change.
* Min Humidity………………..34-44 pct. * 24 hr trend………………5 pct wetter.
* Winds – 20 foot…Slope/Valley..North 5 to 10 mph in the morning becoming northeast 5 to 15 mph in the afternoon.
* Winds…10000 FT MSL…………East 15 to 25 mph.
* Chance of Precip….10 percent in the morning becoming 30 percent in the afternoon. * CWR (>= 0.10 IN)….0 percent.
* LAL………………………..1.
* Haines High Level Index………2 or very low potential for large plume dominated fire growth.

.TONIGHT… * Sky/weather…………………Mostly cloudy. Chance of showers.
* Min Temperature……………..38-47. * 24 hr trend………………3 degrees warmer.
* Max Humidity………………..82-93 pct. * 24 hr trend………………17 pct wetter.
* Winds – 20 foot…Slope/Valley..North 5 to 15 mph.
* Winds…10000 FT MSL…………East 15 to 25 mph.
* Chance of Precip…………….60 percent. * CWR (>= 0.10 IN)…………….80 percent. * LAL………………………..1.

.TUESDAY… * Sky/weather…………………Mostly sunny. Slight chance of showers in the morning.
* Max Temperature……………..54-66. * 24 hr trend………………5 degrees warmer.
* Min Humidity………………..33-46 pct. * 24 hr trend………………Little RH change.
* Winds – 20 foot…Slope/Valley..Northwest 5 to 15 mph.
* Winds…10000 FT MSL…………Northeast 10 to 20 mph in the morning becoming northwest in the afternoon.
* Chance of Precip….20 percent in the morning becoming 0 percent in the afternoon. * CWR (>= 0.10 IN)…..0 percent.
* LAL………………………..1.
* Haines High Level Index………3 or very low potential for large plume dominated fire growth.

NEEDLES, RIVER BAT. (CAZ229):
.TODAY… * Sky/Weather………Partly cloudy then becoming mostly cloudy.
* Max temperature: * Valley floor….63-68. * 24 hr trend…..Little change.
* Min humidity: * Valley floor….22-30 percent. * 24 hr trend…..On average up 6 percent.
* Wind (Slope/valley=20 ft, 10 min avg):
* Valley floor….South wind up to 10 mph.
* 10000 ft msl….South 15 to 25 mph.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1.
* Haines Index……..4.
* Mixing height…….9700 ft agl.
* Transport winds…..South 10 to 15 knots.
* Ventilation………Excellent.

.TONIGHT… * Sky/Weather………Mostly cloudy. Isolated showers in the evening.
* Min temperature: * Valley floor….43-48. * 24 hr trend…..Little change.
* Max humidity: * Valley floor….64-69 percent. * 24 hr trend…..On average up 12 percent.
* Wind (Slope/valley=20 ft, 10 min avg):
* Valley floor….Southwest wind up to 10 mph in the evening becoming downslope/downvalley 2 to 5 mph.
* 10000 ft msl….South 20 to 30 mph.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1.
* Haines Index……..3.

.MONDAY… * Sky/Weather………Partly cloudy. Isolated showers.
* Max temperature: * Valley floor….64-69. * 24 hr trend…..Little change.
* Min humidity: * Valley floor….24-33 percent. * 24 hr trend…..On average up 2 percent.
* Wind (Slope/valley=20 ft, 10 min avg):
* Valley floor….North wind up to 10 mph.
* 10000 ft msl….South 15 to 25 mph becoming southeast 10 to 15 mph in the afternoon.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1.
* Haines Index……..3.
* Mixing height…….8400 ft agl.
* Transport winds…..Light winds becoming northeast around 10 knots in the afternoon.
* Ventilation………Very good.

STATELINE – CLARK COUNTY BORDER:
TODAY… * Sky/Weather………Mostly cloudy. Isolated snow showers in the morning. Scattered showers in the afternoon.
* Max temperature: * 4000 feet…….56-61. * 24 hr trend…..On average down 2 degrees.
* Min humidity: * 4000 feet…….27-37 percent. * 24 hr trend…..On average up 8 percent.
* Wind (slope/valley=20 ft, 10 min avg):
* Slope/valley….South winds up to 10 mph.
* 10000 ft msl….South 15 to 25 mph.
* CWR (>= 0.10 in)….5 percent. * LAL……………..1.
* Haines Index……..3.
* Mixing height…….10000 ft agl.
* Transport winds…..Light winds becoming south around 10 knots in the afternoon.
* Ventilation………Very good.

.TONIGHT… * Sky/Weather………Mostly cloudy then becoming partly cloudy. Scattered snow showers in the evening. Isolated showers through the night. Isolated snow showers after midnight.
* Min temperature: * 4000 feet…….36-41. * 24 hr trend…..Little change.
* Max humidity: * 4000 feet…….73-78 percent. * 24 hr trend…..On average up 13 percent.
* Wind (slope/valley=20 ft, 10 min avg):
* Slope/valley….Downslope/downvalley 2 to 5 mph becoming north up to 10 mph after midnight.
* 10000 ft msl….South 15 to 25 mph increasing to 20 to 30 mph after midnight.
* CWR (>= 0.10 in)….10 percent. * LAL……………..1.
* Haines Index……..3.

.MONDAY… * Sky/Weather………Partly cloudy. Isolated snow showers in the morning. Isolated showers through the day.
* Max temperature: * 4000 feet…….61-66. * 24 hr trend…..On average up 5 degrees.
* Min humidity: * 4000 feet…….27-35 percent. * 24 hr trend…..Little change.
* Wind (slope/valley=20 ft, 10 min avg):
* Slope/valley….Northeast winds up to 10 mph.
* 10000 ft msl….South 15 to 20 mph becoming east 10 to 15 mph in the afternoon.
* CWR (>= 0.10 in)….0 percent. * LAL……………..1.
* Haines Index……..3.
* Mixing height…….7900 ft agl.
* Transport winds…..Northeast around 10 knots in the morning becoming light.
* Ventilation………Good.

*************************** OUT OF COUNTY ********************************
LOS ANGELS CO. SAN GABRIEL VALLEY (CAZ247/CAZ249):
Monday
A 30 percent chance of showers, mainly before 11am. Partly sunny, with a high near 64. North northwest wind around 5 mph becoming south in the morning.
Monday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 48. South wind around 5 mph becoming north in the evening.
Tuesday
Mostly sunny, with a high near 71. North wind 5 to 10 mph becoming west southwest in the morning.
Tuesday Night
Partly cloudy, with a low around 47. Northwest wind around 10 mph, with gusts as high as 15 mph.

LOS ANGELES COUNTY SAN FERNANDO VALLEY:
Monday
A 30 percent chance of showers, mainly before 11am. Partly sunny, with a high near 66. North wind around 5 mph becoming south southeast in the morning.
Monday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 48. South southeast wind around 5 mph becoming north in the evening.
Tuesday
Mostly sunny, with a high near 71. North wind 5 to 10 mph becoming west southwest in the morning.
Tuesday Night
Partly cloudy, with a low around 48. Northwest wind around 10 mph, with gusts as high as 15 mph.

SANTA CLARITA VALLEY:
Monday
A 30 percent chance of showers before 11am. Partly sunny, with a high near 62. Northeast wind 10 to 15 mph, with gusts as high as 25 mph.
Monday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 45. North wind around 15 mph, with gusts as high as 25 mph.
Tuesday
Mostly sunny, with a high near 68. North wind 10 to 15 mph becoming west northwest in the morning. Winds could gust as high as 20 mph.
Tuesday Night
Partly cloudy, with a low around 43. Northwest wind 10 to 15 mph, with gusts as high as 20 mph.

SANTA MONICA MOUNTAINS RECREATIONAL AREA:
Monday
A 20 percent chance of showers before 11am. Partly sunny, with a high near 61. North wind 5 to 10 mph.
Monday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 47. North wind 5 to 10 mph.
Tuesday
Mostly sunny, with a high near 65. North wind 10 to 15 mph becoming west southwest in the morning. Winds could gust as high as 20 mph.
Tuesday Night
Partly cloudy, with a low around 45. Northwest wind 10 to 15 mph, with gusts as high as 20 mph.

ANGELES NATIONAL FOREST (CAZ253):
WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 11 AM PDT TUESDAY
Monday
A 30 percent chance of showers. Mostly cloudy, with a high near 49. East wind around 5 mph.
Monday Night
A 30 percent chance of showers, mainly after 11pm. Mostly cloudy, with a low around 40. North northeast wind around 10 mph.
Tuesday
A 20 percent chance of showers before 11am. Mostly sunny, with a high near 55. North wind around 10 mph becoming west southwest in the morning. Winds could gust as high as 15 mph.
Tuesday Night
Mostly cloudy, with a low around 38. Northwest wind 10 to 15 mph, with gusts as high as 20 mph.

ANTELOPE VALLEY (CAZ259):
Monday
A 20 percent chance of showers. Mostly cloudy, with a high near 57. South wind 5 to 15 mph becoming northeast in the morning. Winds could gust as high as 20 mph.
Monday Night
A 30 percent chance of showers, mainly after 11pm. Mostly cloudy, with a low around 40. North northeast wind 10 to 15 mph becoming northwest in the evening. Winds could gust as high as 20 mph.
Tuesday
A 20 percent chance of showers before 11am. Mostly sunny, with a high near 60. Breezy, with a west wind 5 to 10 mph increasing to 15 to 20 mph in the morning. Winds could gust as high as 35 mph.
Tuesday Night
Partly cloudy, with a low around 40. Breezy, with a west northwest wind 20 to 25 mph, with gusts as high as 40 mph.

KERN CO. DESERTS (CAZ298):
.MONDAY… Sky/weather………Partly sunny.
Max Temperature…..54-59. 24 HR Trend……Up 3-5 degrees.
Min Humidity……..41-51 percent. 24 HR Trend……Down 2-4 percent.
20-Foot Winds…….Northeast up to 10 mph.
LAL……………..1.
Ventilation………Excellent.
Mixing height…….9300 ft AGL.
Transport Winds…..Northeast around 15 mph.
Chc Wetting Rain….0 percent.

.MONDAY NIGHT… Sky/weather………Partly cloudy.
Min Temperature…..37-42. 24 HR Trend……Up 2-4 degrees.
Max Humidity……..65-75 percent. 24 HR Trend……Down 3-5 percent.
20-Foot Winds…….Northeast 3-7 mph.
LAL……………..1. Chc Wetting Rain….0 percent.

.TUESDAY… Sky/weather………Sunny.
Max Temperature…..57-62. 24 HR Trend……Up 2-4 degrees.
Min Humidity……..38-48 percent. 24 HR Trend……Little change.
20-Foot Winds…….Northeast 4-7 mph becoming west 15-25 mph during the afternoon.
LAL……………..1.
Ventilation………Very good.
Mixing height…….6600 ft AGL.
Transport Winds…..North around 15 mph in the morning shifting to the northwest in the afternoon.
Chc Wetting Rain….0 percent.

La Jolla CA
Monday
A chance of showers. Cloudy, with a high near 57. Northeast wind 5 to 10 mph becoming northwest in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Monday Night
A chance of showers. Mostly cloudy, with a low around 51. North wind 5 to 15 mph becoming northeast after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday
A slight chance of showers before 11am. Mostly sunny, with a high near 60. Light and variable wind becoming west 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 20%.
Tuesday Night
Partly cloudy, with a low around 52. West wind 10 to 15 mph, with gusts as high as 25 mph.

Poway CA
Monday
A chance of showers. Cloudy, with a high near 61. Calm wind becoming northwest around 5 mph in the afternoon. Chance of precipitation is 40%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday Night
Showers likely. Cloudy, then gradually becoming partly cloudy, with a low around 47. North wind around 5 mph becoming northeast after midnight. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday
A slight chance of showers before 11am. Mostly sunny, with a high near 64. Light and variable wind becoming west 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 20%.
Tuesday Night
A slight chance of showers after 11pm. Mostly cloudy, with a low around 48. Southwest wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

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

The next significant Pacific storm system will reach the Great Basin Tuesday night, then linger across the outlook area Wednesday and Thursday. Significant snowfall is once again possible for most mountain locations and the adjacent higher valleys. Snow levels may fall to valley floors for a time
Monday
A 30 percent chance of snow showers before noon. Partly sunny, with a high near 48. Calm wind becoming north around 6 mph in the afternoon. New snow accumulation of less than a half inch possible.
Monday Night
A 20 percent chance of snow showers after midnight. Mostly cloudy, with a low around 31. North wind 3 to 6 mph.
Tuesday
A 20 percent chance of snow showers before noon. Partly sunny, with a high near 51. Light and variable wind.
Tuesday Night
A slight chance of rain showers before midnight, then rain and snow. Low around 26. South southwest wind 8 to 10 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

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THIS DAY IN WEATHER HISTORY:
2016: A line of convective showers with minimal lightning, but strong winds, moved through the area. Several locations reported 46-55 mph gusts. Trees and power lines were downed in Riverside and near Edom Hill.

2011: A 9.1 magnitude earthquake in Japan produced a Tsunami that that impacted SoCal on this day. The tsunami arrived with multiple waves that peaked at two feet. Impacts at the beaches were limited, however strong currents in the bays (typical of past tsunamis in Southern California) caused minor damage to boats and docks.

2006: A powerful winter storm hit the region on 3/10 and on this day. On this day a supercell thunderstorm produced a waterspout off south Carlsbad. This storm continued through northern San Diego County leaving one inch hail for the second consecutive day in Escondido, and half inch hail accumulated to one inch deep from Carlsbad to Escondido. A tornado was later reported in north Ramona from this storm, which snapped and downed trees and caused property damage. Storm total snowfall was 36 inches fell at Big Bear Lake, Lake Arrowhead and the Palm Springs Tram. 27 inches fell at Pine Cove and Idyllwild, 25 inches at Cuyamaca, 13 inches in Warner Springs, and 12 inches in Pine Valley. All the mountain
highways were closed. Roof damage occurred in Guatay. One immigrant was killed and seven were injured near Pine Valley.

1995: Heavy rain produced 3.07 inches at Banning – Beaumont, 2.75 inches at Murrieta, 2.10 inches at Moreno Valley, 1.23 inches at Riverside, 0.84 inch at Palm Springs. 7.73 inches fell at Wrightwood in 48 hours. A section of I-5 washed out, and there was a lot of local flooding. Over 20 inches of snow fell at Bear Mountain Ski Resort. On this day 3.06 inches of precipitation fell in Big Bear Lake, the greatest daily amount on record for March.

1967: A series of storms brought heavy rain starting this day 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.

1909: Two waterspouts were observed several miles off Pt. Loma for 20 minutes.
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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. @ 0640 Hrs. TEMP: 330 RH: 91% WIND: CALM
6.72” RF @ HESP. STA.SINCE OCT. 1st/20 Yr Avg: 7.12” : MONTH: 0.57” YTD S/F: 1.00” /
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