SPECIAL WEATHER STATEMENT
Issue Date: 233 PM PST SUN DEC 6 2009
Expiration: 600 AM PST MON DEC 07 2009
...POTENTIAL FOR SIGNIFICANT RAIN AND MOUNTAIN SNOW MONDAY FOLLOWED
BY COLD TEMPERATURES AND POTENTIAL FROST OR FREEZES FOR MANY AREAS
MONDAY NIGHT...
...POTENTIAL FOR ADDITIONAL STORMS TO AFFECT SOUTHERN AND CENTRAL
CALIFORNIA LATER THIS WEEK...
A SERIES OF PACIFIC STORMS ARE EXPECTED TO MOVE INTO CALIFORNIA
THIS WEEK...BRINGING PERIODS OF RAIN AND MOUNTAIN SNOW TO THE
STATE.
THE FIRST STORM WILL BRING AN INCREASING CHANCE FOR RAIN AND
MOUNTAIN SNOW ACROSS THE REGION LATE TONIGHT...WITH
PRECIPITATION OVERSPREADING THE ENTIRE FORECAST AREA ON MONDAY.
THIS FIRST STORM SYSTEM IS NOW TAKING AN OVER-WATER TRAJECTORY...WHICH
WILL INCREASE ITS PRECIPITATION PRODUCTION. RAINFALL ESTIMATES WITH
THIS SYSTEM ARE EXPECTED TO RANGE BETWEEN .50 AND 1.50 INCHES ACROSS
MOST AREAS...WITH 1.50 TO 3.00 INCHES EXPECTED ACROSS SOUTH AND SOUTHWEST
FACING FOOTHILL AND MOUNTAIN LOCATIONS...EXCEPT ISOLATED AMOUNTS UP TO
4.00 INCHES POSSIBLE ACROSS FAVORED COASTAL SLOPES OF THE SAN GABRIELS.
THE HIGHEST RAINFALL AMOUNTS ARE EXPECTED ACROSS LOS ANGELES COUNTY...
ESPECIALLY ACROSS THE COASTAL SLOPES OF THE SAN GABRIEL MOUNTAINS AND
ADJACENT FOOTHILLS.
THE GREATEST THREAT OF PRECIPITATION FOR THE STATION FIRE BURN AREA
WILL BE LATE MONDAY MORNING THROUGH EARLY MONDAY EVENING. DURING THIS
TIME...THERE WILL LIKELY BE PERIODS OF MODERATE TO OCCASIONALLY HEAVY
RAIN. RAINFALL RATES ACROSS THE STATION BURN AREA ARE GENERALLY EXPECTED
TO RANGE BETWEEN .25 AND .50 INCHES PER HOUR FROM LATE MONDAY MORNING
THROUGH EARLY MONDAY EVENING...HOWEVER LOCAL RATES AS HIGH AS .75 INCHES
PER HOUR WILL BE POSSIBLE ON MONDAY AFTERNOON. DUE TO THE POTENTIAL FOR
HIGHER INTENSITY RAINFALL RATES ACROSS LOS ANGELES COUNTY...A FLASH FLOOD
WATCH HAS BEEN POSTED FOR THE RECENT BURN AREAS. OF PARTICULAR CONCERN...
WILL BE THE THREAT OF DEBRIS FLOWS IN THE STATION AND MORRIS BURN
AREAS...DUE TO THEIR SOUTH FACING EXPOSURE.
THIS STORM WILL ALSO LIKELY BRING SIGNIFICANT MOUNTAIN SNOW AND
STRONG WINDS TO PORTIONS OF THE SOUTHLAND. AHEAD OF THE FRONT...
GUSTY SOUTH TO SOUTHWEST WINDS WILL AFFECT MUCH OF THE AREA.
BEHIND THE FRONT...SNOW LEVELS WILL FALL RAPIDLY MONDAY NIGHT AS VERY
COLD AIR SPREADS ACROSS THE REGION. LATER MONDAY NIGHT...SNOW LEVELS
ARE EXPECTED TO LOWER TO AROUND 2000 FEET ACROSS MUCH OF THE
REGION...WITH LOCAL SNOW LEVELS AS LOW AS 1500 FEET. THE LOW SNOW LEVELS
WILL BRING THE POTENTIAL FOR SNOW SHOWERS ACROSS THE ANTELOPE VALLEY...
CUYAMA VALLEY...AND MUCH OF THE INTERSTATE 5 CORRIDOR NORTH OF CASTAIC.
THE VERY COLD AIR MASS WILL LIKELY CREATE DANGEROUS ICY CONDITIONS IN
THE MOUNTAINS...AS WELL AS THE ANTELOPE VALLEY AND OTHER INTERIOR VALLEY
LOCATIONS. STRONG NORTHWEST WINDS WILL ALSO BE A FACTOR BEHIND THE FRONT
ON MONDAY NIGHT...CREATING VERY COLD WIND CHILL READINGS ACROSS MUCH
OF THE FORECAST AREA. FOR MORE INFORMATION ON THE LATEST WIND DETAILS...
PLEASE REFER TO THE LATEST HIGH WIND WATCH PRODUCT. FOR MORE INFORMATION
ON WINTER WEATHER CONDITIONS...PLEASE REFER TO THE LATEST WINTER STORM
WATCH PRODUCT. AREAS THAT ARE FREE FROM PRECIPITATION AND WINDS
WILL BE AT RISK FOR POTENTIAL FROST AND FREEZE CONDITIONS LATE MONDAY
NIGHT.
LATER IN THE WEEK...A SECOND STORM WILL LIKELY IMPACT SOUTHERN AND
CENTRAL CALIFORNIA THURSDAY INTO FRIDAY. THERE STILL EXISTS
CONSIDERABLE UNCERTAINTY IN THE EXACT PLACEMENT...INTENSITY AND
AMOUNT OF RAINFALL ACROSS THE AREA. RESIDENTS AND LOCAL
EMERGENCY OFFICIALS ARE URGED TO STAY TUNED TO THE LATEST NATIONAL
WEATHER SERVICE FORECASTS FOR UPDATES ON THIS DEVELOPING WEATHER
SITUATION.
A THIRD SYSTEM REMAINS A POSSIBILITY FOR NEXT WEEKEND...WHICH WOULD
BRING ADDITIONAL PRECIPITATION TO THE REGION.
THESE STORMS WILL LIKELY GENERATE LARGE SWELLS AND HIGH SURF
CONDITIONS AT TIMES THIS WEEK. PLEASE REFER TO THE LATEST MARINE
WEATHER STATEMENT FOR THE LATEST DETAILS ACROSS THE COASTAL WATERS.
HAZARDOUS WEATHER OUTLOOK
Issue Date: 139 PM PST SUN DEC 6 2009
Expiration: 600 AM PST MON DEC 07 2009
THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHWESTERN CALIFORNIA.
.DAY ONE... TODAY
HAZARDOUS WEATHER IS NOT EXPECTED AT THIS TIME.
* MARINE WEATHER STATEMENT...SEE FZUS76 KLOX - MWSLOX FOR DETAILS *
* SPECIAL WEATHER STATEMENT..SEE WWUS86 KLOX - SPSLOX FOR DETAILS *
.DAYS TWO THROUGH SEVEN... MONDAY THROUGH SATURDAY
A WINTER STORM WILL MOVE OVER THE AREA MONDAY. A WINTER STORM
WARNING IS IN EFFECT IN VENTURA AND LOS ANGELES COUNTIES ABOVE 5000
FEET THOUGH SNOW WILL ACCUMULATE LOCALLY TO 1500 FEET MONDAY THROUGH
TUESDAY MORNING. THERE IS A HIGH WIND WATCH FOR AREAS OF SANTA
BARBARA COUNTY AS WELL AS THE ANTELOPE VALLEY FOR MONDAY THROUGH
TUESDAY MORNING. A FLASH FLOOD WATCH IN IN EFFECT FOR THE RECENT
BURN AREAS IN LOS ANGELES COUNTY MONDAY MORNING THROUGH MONDAY
EVENING. A GALE WATCH IS IN EFFECT OUT TO 60 NM MONDAY MORNING
THROUGH TUESDAY MORNING FROM POINT PIEDRAS BLANCAS TO SEAL BEACH. A
HIGH SURF ADVISORY MAY BE ISSUED FOR THE PERIOD MONDAY AFTERNOON
THROUGH TUESDAY MORNING FOR LOS ANGELES AND VENTURA COUNTIES.
A SECOND STORM WILL AFFECT THE AREA THURSDAY AND FRIDAY
MORNING AND A THIRD STORM MAY ARRIVE OVER THE WEEKEND.
* WINTER STORM WARNING.......SEE WWUS46 KLOX - WSWLOX FOR DETAILS *
* HIGH WIND WATCH............SEE WWUS76 KLOX - NPWLOX FOR DETAILS *
* FLOOD WATCH................SEE WGUS66 KLOX - FFALOX FOR DETAILS *
* MARINE WEATHER STATEMENT...SEE FZUS76 KLOX - MWSLOX FOR DETAILS *
* GALE WATCH...............SEE WHUS76 KLOX - MWWLOX FOR DETAILS *
* SPECIAL WEATHER STATEMENT..SEE WWUS86 KLOX - SPSLOX FOR DETAILS *
.SPOTTER INFORMATION STATEMENT...
WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.
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