HAZARDOUS WEATHER OUTLOOK
Issue Date: 400 AM PST FRI DEC 11 2009
Expiration: 400 AM PST SAT DEC 12 2009
THIS HAZARDOUS WEATHER OUTLOOK IS FOR
ALL OF EXTREME SOUTHWESTERN CALIFORNIA.
.DAY ONE...TONIGHT
* HIGH SURF ADVISORY WITH 8 TO 10 FOOT WAVES AT SOME BEACHES.
HIGH RIP CURRENT RISK.
* LIGHT TO MODERATE SHOWERS TODAY AND TONIGHT.
.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY
* ANOTHER STORM WILL BRING MORE RAIN AND MOUNTAIN SNOW
SATURDAY AND SUNDAY.
.SPOTTER INFORMATION STATEMENT...
SKYWARN WEATHER ACTIVATION MAY BE NEEDED. WEATHER SPOTTERS ARE
ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS.
SPECIAL WEATHER STATEMENT
Issue Date: 217 AM PST FRI DEC 11 2009
Expiration: 200 PM PST FRI DEC 11 2009
...WET WEATHER MOVING BACK INTO SOUTHERN CALIFORNIA THIS WEEKEND...
A STRING OF DISTURBANCES OVER THE EAST PACIFIC WILL BE MOVING
THROUGH SOUTHERN CALIFORNIA BEGINNING TODAY AND CONTINUING THROUGH
SUNDAY. PERIODS OF RAIN...AND SNOW AT HIGHER ELEVATIONS IN THE
MOUNTAINS ARE EXPECTED.
THE FIRST SYSTEM WILL BRING LIGHT TO LOCALLY MODERATE RAIN SHOWERS
FRIDAY MORNING. THIS WILL BE FOLLOWED BY ANOTHER PERIOD OF LIGHT TO
MODERATE RAIN ON SATURDAY MORNING. ONE FINAL ROUND OF MODERATE TO
LOCALLY HEAVY RAIN AND SNOW IS POSSIBLE LATE SATURDAY INTO SUNDAY
MORNING. IN BETWEEN EACH SYSTEM...LIGHT SHOWERS MAY LINGER NEAR THE
FOOTHILLS AND MOUNTAINS DUE TO CONTINUED MOIST WESTERLY FLOW.
TOTAL RAINFALL AMOUNTS FOR THE ENTIRE EVENT THROUGH SUNDAY SHOULD
GENERALLY BE IN THE RANGE OF 0.75 TO 1.75 INCHES FOR THE COAST AND
VALLEYS...AND 2.00 TO LOCALLY 4.00 INCHES ON THE FOOTHILLS AND
COASTAL SLOPES OF THE MOUNTAINS. THE BIGGEST TOTALS SHOULD BE IN THE
SAN BERNARDINO MOUNTAINS. SNOW LEVELS WILL INITIALLY BE QUITE HIGH
ON FRIDAY...NEAR 7000 FEET...BUT SHOULD FALL TO AROUND 5500 FEET
OVER THE SAN BERNARDINOS AND 6500 FEET OVER THE SAN JACINTOS BY
SUNDAY MORNING...WHERE UP SIX INCHES OF SNOW COULD ACCUMULATE BY
SUNDAY NIGHT. LITTLE SNOW ACCUMULATION IS EXPECTED ON THE SAN DIEGO
COUNTY MOUNTAINS. IN THE DESERTS...GENERALLY ONE HALF INCH OF RAIN
OR LESS IS EXPECTED.
RAINFALL OF SEVERAL INCHES COULD CAUSE RIVERS TO RISE ENOUGH TO
FLOOD LOW-LYING...TYPICALLY FLOOD PRONE AREAS IN SAN DIEGO COUNTY.
EVEN THOUGH WIDESPREAD HEAVY RAIN IS NOT EXPECTED FOR SAN DIEGO
COUNTY AT THIS TIME...ISOLATED CONVECTION...OR A SLIGHT SHIFT IN THE
STORM TRACK WOULD MAKE IT MORE LIKELY. OF MAIN CONCERN WOULD BE THE
SOUTH COAST NEAR THE TIJUANA RIVER...AND THE SAN DIEGO RIVER...WHERE
LOW-WATER CROSSINGS WOULD NEED TO BE BARRICADED.
HEAVY RAINFALL ON RECENT BURN AREAS COULD RESULT IN LIFE-THREATENING
DEBRIS FLOWS. A FLASH FLOOD WATCH MAY BE NEEDED IN THESE AREAS BY
SATURDAY.
PERSONS LIVING IN AND CLOSE TO RECENTLY BURNED AREAS OR IN LOW-LYING
AREAS SUBJECT TO RIVER AND STREAM FLOODING SHOULD KEEP ABREAST OF
LATER FORECASTS.
STAYED TUNED FOR UPDATES ON THIS DEVELOPING WEATHER EVENT. LISTEN TO
NOAA WEATHER RADIO OR VISIT OUR WEBSITE AT WEATHER.GOV/SANDIEGO FOR
THE LATEST UPDATES OF FORECASTS AND WARNINGS.
|
|
|
