Snow Advisory 2, NWS San Diego, CA

000 
WWUS46 KSGX 281731
WSWSGX

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE SAN DIEGO CA
931 AM PST WED FEB 28 2007


CAZ058-281845-
/O.EXP.KSGX.SN.Y.0002.000000T0000Z-070228T1800Z/
SAN DIEGO COUNTY MOUNTAINS-
931 AM PST WED FEB 28 2007

...SNOW ADVISORY WILL EXPIRE AT 10 AM PST THIS MORNING...

THE SNOW ADVISORY WILL EXPIRE AT 10 AM PST THIS MORNING. 



$$

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
400 AM PST WED FEB 28 2007

.SYNOPSIS...
ANOTHER COLD FRONT WILL MOVE ACROSS SOUTHERN CALIFORNIA BRINGING
SHOWERS THIS MORNING...ESPECIALLY IN SAN DIEGO COUNTY.
SHOWERS WILL TAPER OFF DURING THE AFTERNOON. STRONG WINDS WILL
CONTINUE OVER THE DESERT AREAS THIS MORNING HOURS THEN DIMINISH
DURING THE AFTERNOON. HIGH PRESSURE BUILDING TO THE NORTH
THURSDAY WILL CAUSE OFFSHORE FLOW. GUSTY NORTHEAST WINDS AND A
WARMING TREND ARE EXPECTED FRIDAY THROUGH SATURDAY. SUNDAY THROUGH
NEXT TUESDAY SHOULD CONTINUE TO BE WARMER THAN NORMAL AND DRY.

&&

.DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...

SHORTWAVE AND WEAK COLD FRONT WILL CONTINUE TO MOVE THROUGH THE AREA
THIS MORNING WITH MOST OF THE SHOWER ACTIVITY IN SAN DIEGO COUNTY.
UP TO 4 INCHES OF SNOW SHOULD FALL THIS MORNING IN THE SAN DIEGO MTS
SO WILL LEAVE SNOW ADVISORY GOING THERE. JET STREAM HAS MOVES SOUTH
HELPING WINDS DIMINISH OVER MTS AND DESERTS...BUT HAVE LEFT WIND
ADVISORY GOING TIL NOON FOR JUST THE COA VALLEY AND SAN DIEGO DES.
SHOWERS WILL TAPER OFF THIS PM AS THE TROUGH MOVES EAST.

SURFACE HIGH PRESSURE BUILDING TO THE NORTH AND HIGH PRESSURE RIDGE
BUILDING ALONG THE COAST THU THROUGH SAT WILL CAUSE OFFSHORE FLOW.
WINDS SHOULD PEAK FRIDAY NIGHT/SATURDAY MORNING TIME PERIOD. LATEST
WIND GUST GUIDANCE FROM 00Z MODELS IS SHOWING 35-60 MPH GUSTS IN
FAVORED LOCATIONS. TEMPERATURES BEGIN TO WARM UP QUICKLY FROM FRIDAY
ON...PEAKING SATURDAY AND SUNDAY ABOUT 10-15 DEGREES ABOVE NORMAL. A
SLIGHT COOL DOWN ON MONDAY AND TUESDAY AS OFFSHORE FLOW
WEAKENS...BUT HIGH PRESSURE RIDGE ALOFT...5820 METERS AT 500
MB...INDICATES THESE DAYS WILL BE WARMER THAN NORMAL AND DRY.

&&

.AVIATION...
281000Z...SHOWERS WERE MOVING SOUTHEAST ABOUT 20 MPH EARLY THIS
MORNING. MODELS INDICATE MOST ACTIVITY WILL BE ENDING ABOUT 12-15Z.
SKIES SHOULD BE MOSTLY CLEAR AFTER ABOUT 17Z WITH MOST CLOUDS UP
AGAINST THE MOUNTAINS. BASES WILL BE QUITE HIGH ABOUT 5000 FT MSL
WITH LOCAL BASES ABOUT 3000 FT MSL. VIS MAINLY VFR WILL LOCAL MVFR
NEAR THE FOOTHILLS. WINDS WERE GRADUALLY DECREASING. STRONG WINDS IN
THE LOWER DESERTS WERE DECREASING BUT STILL GUSTING TO ABOUT 25 KT
EARLY THIS MORNING. GUSTY WINDS ALOFT ARE EXPECTED TO DROP OFF BY
THIS EVENING...ABOUT 05Z. WINDS AT 5K FT...WEST 25-35 KT...BECOMING
WEST TO NORTHWEST 15-20 KT LATE THIS AFTERNOON THROUGH THU
MORNING...THEN NORTH 5-15 KT LATE THU MORNING THROUGH AFTERNOON.
WINDS AT 10K FT...WEST 40-55 KT...BECOMING NORTHWEST 30-40 KT LATE
AFTERNOON THROUGH THIS EVENING THROUGH THU MORNING...THEN NORTHWEST
20-30 KT LATE THU MORNING THROUGH AFTERNOON.

&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...WIND ADVISORY UNTIL NOON FOR COACHELLA
     VALLEY AND SAN DIEGO COUNTY DESERTS UNTIL NOON.

PZ...SMALL CRAFT ADVISORY UNTIL 10 PM PST FOR COASTAL
     WATERS FROM SAN MATEO POINT TO THE MEXICAN BORDER AND OUT
     30 NM-WATERS FROM SAN MATEO POINT TO THE MEXICAN BORDER
     EXTENDING 30 TO 60 NM OUT INCLUDING SAN CLEMENTE ISLAND.

&&

PUBLIC...MACKECHNIE
AVIATION/MARINE...WHITLOW

NWS ON THE WEB AT WEATHER.GOV/SANDIEGO

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SAN DIEGO CA
400 PM PST TUE FEB 27 2007

CAZ042-043-048-050-055>058-060>062-PZZ750-775-281200-
ORANGE COUNTY COASTAL AREAS-SAN DIEGO COUNTY COASTAL AREAS-
SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS-THE INLAND EMPIRE-
SAN DIEGO COUNTY VALLEYS-SAN BERNARDINO COUNTY MOUNTAINS-
RIVERSIDE COUNTY MOUNTAINS-SANTA ANA MOUNTAINS AND FOOTHILLS-
SAN DIEGO COUNTY MOUNTAINS-APPLE AND LUCERNE VALLEYS-
COACHELLA VALLEY-SAN DIEGO COUNTY DESERTS-
COASTAL WATERS FROM SAN MATEO POINT TO THE MEXICAN BORDER AND OUT
30 NM-
WATERS FROM SAN MATEO POINT TO THE MEXICAN BORDER EXTENDING 30 TO
60 NM OUT INCLUDING SAN CLEMENTE ISLAND-
400 PM PST TUE FEB 27 2007

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST
CALIFORNIA

.DAY ONE...TONIGHT

STRONG WINDS OVER THE DESERT AREAS WILL CONTINUE TO CREATE AREAS OF
BLOWING SAND AND DUST. POOR VISIBILITY AND STRONG CROSS WINDS WILL
MAKE TRAVEL VERY HAZARDOUS. SEE LAXNPWSGX.

RAIN AND SNOW WILL BE INCREASING AGAIN LATE TONIGHT. THE COMBINATION
OF WIND...SNOW...AND FOG WILL CAUSE VERY LOW VISIBILITIES AT TIMES
IN THE MOUNTAINS AND CREATE HAZARDOUS TRAVEL CONDITIONS. THE
PRECIPITATION IS EXPECTED TO DECREASE WEDNESDAY AFTERNOON. SEE
LAXWSWSGX.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH TUESDAY

FOR WEDNESDAY...VERY STRONG GUSTY WEST WINDS WITH BLOWING SAND AND
DUST WILL CONTINUE OVER THE DESERTS CAUSING POOR VISIBILITY AND
HAZARDOUS DRIVING CONDITIONS. SEE LAXNPWSGX. RAIN AND SNOW WILL ALSO
CONTINUE WEDNESDAY. OVER THE MOUNTAINS THE COMBINATION OF
WIND...SNOW...AND BLOWING SNOW WILL CONTINUE HAZARDOUS TRAVEL
CONDITIONS. SEE LAXWSWSGX.

FOR THURSDAY NO HAZARDOUS WEATHER IS EXPECTED.

FOR FRIDAY AND SATURDAY...NORTHEAST WINDS GUSTING OVER 45 MPH BELOW
PASSES AND CANYONS AND VERY LOW RELATIVE HUMIDITY WILL CREATE
CRITICAL FIRE WEATHER CONDITIONS BUT A FIRE WEATHER WATCH IS NOT
ANTICIPATED DUE TO THE RECENT PRECIPITATION.

FOR SUNDAY THROUGH TUESDAY NO HAZARDOUS WEATHER IS EXPECTED.

.SPOTTER INFORMATION STATEMENT...
SKYWARN WEATHER ACTIVATION IS NOT REQUESTED FOR THIS AREA...HOWEVER
WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS.

BALFOUR