Damaging Wind in California, April 7, 2001

EXTREME SOUTHWESTERN CALIFORNIA AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
230 PM PDT SAT APR 7 2001

                             ...SYNOPSIS...

A DEPARTING STORM WILL CONTINUE SOME LINGERING SHOWERS INTO TONIGHT.
LOCAL STRONG GUSTY WINDS IN THE MOUNTAINS AND DESERTS WILL DECREASE
OVERNIGHT. PARTLY CLOUDY SUNDAY IN DRY WEST FLOW ALOFT. ANOTHER PACIFIC
STORM WILL BRING A CHANCE OF SHOWERS MONDAY INTO TUESDAY. VARIABLE
CLOUDINESS AND A LITTLE WARMER DURING THE SECOND HALF OF NEXT WEEK WITH
WEAK LOW PRESSURE ALOFT FOLLOWED BY WEAK HIGH PRESSURE.

                            ...DISCUSSION...

THERE WAS LIGHT TO MODERATE RAIN W OF MOUNTAINS TODAY AND LIGHT RAIN IN
THE DESERTS. SNOW IN THE MOUNTAINS. PRECIP GENERALLY DECREASED FROM THE
N AND NW THIS AFTERNOON. 12Z NKX SOUNDING HAD A DEEP LOW LEVEL MOIST
LAYER TO NEAR 12 KFT WITH STRONG W WINDS ALOFT. MELTING LEVEL WAS NEAR
6 KFT THIS AM BUT HAS LOWERED SINCE. GRADIENTS STRONG ONSHORE TO NE WITH
ABOUT 15 MB SAN-TPH BUT ONLY ABOUT 4 MB SAN-IPL.

JET MAX AND ASSOCIATED VORT MAX WILL MOVE OFF TO THE E THIS EVE. SCT
POST FRONTAL SHOWERS TONIGHT...GENERALLY DECREASING FROM THE N. SNOW
LEVEL LOWERING TO NEAR 4000 FT. COMBINATION OF SURFACE GRADIENTS AND
WINDS ALOFT WILL CAUSE GUSTY WINDS IN THE MOUNTAINS AND DESERTS...
ESPECIALLY NRN DESERTS. LESS FAVORABLE PATTERN FOR SRN DESERT WINDS BUT
MOUNTAIN WAVES COULD BRING WINDS THERE TOO. COMBINATIONS OF SNOW/WIND
FOR WINTER WEATHER ADVISORY IN MOUNTAINS AND WIND ADVISORY IN DESERTS
UNTIL 6 PM. SUPPORT FOR WINDS BEGINS TO DECREASE TONIGHT. A FEW SHOWERS
COULD LINGER INTO SUNDAY AM...ESPECIALLY SRN AREAS AND IN THE
MOUNTAINS...BUT LOOKS LIKE PRECIP SHOULD TAPER OFF QUICKLY TONIGHT AND
WILL LEAVE OUT OF ZONES FOR SUNDAY. COULD BE SOME LOCAL DENSE FOG INLAND
LATE TONIGHT/SUNDAY AM WITH WED GROUND AND DECREASING CLOUD COVER.
OTHERWISE GENERALLY DRY W TO NW FLOW ALOFT SUNDAY. WARMER SUNDAY WITH
MORE SUNSHINE BUT HEIGHTS/THICKNESS REMAIN LOW. ANOTHER VORT MAX
ROTATING S ALONG THE COAST AROUND THE W SIDE OF MAIN TROUGH OVER WRN
US FOR MORE CLOUDS/COOLING AND ANOTHER CHANCE OF SHOWERS MON WITH
LOWERING SNOW LEVELS. ENOUGH COLD AIR ALOFT FOR A CHANCE OF
THUNDERSTORMS MON.

LONGER RANGE PROGS INDICATE SOME SHOWERS LINGERING INTO TUE...HOWEVER
GENERALLY DECREASING AS TROUGH AND VORT MAX MOVE E. LOTS OF
DISAGREEMENTS ON DETAILS BUT GENERALLY WEAK UPPER TROUGH WED THROUGH
INTO FRI FOR SOME CLOUDS AND CONTINUED BELOW SEASONAL TEMPS. WEAK
RIDGING TOWARD WEEKEND FOR MORE SUNSHINE AND GRADUAL WARMING.

SAN 8125

.SAN...WINTER WEATHER ADVISORY 55/56/58.
       WIND ADVISORY 60/61/62.

ATKIN