Hail and Damaging Winds in California, April 7, 2001

INTERIOR CENTRAL CALIFORNIA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY - HANFORD CA
320 PM PDT SAT APR 7 2001

A VORTICITY CENTER MOVING THROUGH THE STRONG COLD POOL ALOFT /IN
WAKE OF THIS MORNING/S COLD FRONT/ HAS TRIGGERED WIDESPREAD
SHALLOW CONVECTION ACROSS THE CENTRAL AND SOUTHERN SAN JOAQUIN
VALLEY AND THE FOOTHILLS...AND EVEN SOME THUNDERSNOW OVER THE KERN
COUNTY DESERTS. SEVERAL REPORTS OF FUNNEL CLOUDS AND PEA-SIZE HAIL.
CONVECTION WILL CONTINUE INTO THE EVENING...THEN BEGIN TO DIE OFF
AFTER SUNSET.

SNOW SHOWERS IN THE MOUNTAINS WILL TAPER OFF OVERNIGHT. PER
COORDINATION WITH WFO/S SACRAMENTO AND RENO WILL ALLOW SNOW ADVISORY
FOR THE FOOTHILLS TO EXPIRE...AND DOWNGRADE THE WINTER STORM WARNING
FOR THE SOUTHERN SIERRA NEVADA ABOVE 4000 FEET TO A SNOW ADVISORY
UNTIL 06Z. WILL ALSO LET THE WINTER WEATHER ADVISORY FOR THE KERN
COUNTY MOUNTAINS EXPIRE...BUT ISSUE A WIND ADVISORY UNTIL 06Z. IN
THE KERN COUNTY DESERTS...SOME GUSTS TO 40-50 MPH CONTINUE...SO WIND
ADVISORY THERE ON TRACK.

SOME INSTABILITITY SHOWERS WILL REDEVELOP OVER THE REGION SUNDAY...
BUT DO NOT EXPECT REDEVELOPMENT OF CONVECTION. THE 12Z MODELS DROP
ANOTHER VORTICITY CENTER...ABOUT +30...AROUND THE BASE OF THE TROUGH
AND INTO THE SOUTHLAND MONDAY AFTERNOON. THIS WILL ENHANCE THE
INSTABILITY OVER THE REGION...SO WILL GO WITH A CHANCE OF SHOWERS
OVER THE SAN JOAQUIN VALLEY AND KERN DESERTS...WITH SHOWERSA LIKELY
OVER THE MOUNTAINS.

FOR THE EXTENDED FORECAST PERIOD...ANOTHER SHORT-WAVE DROPS INTO THE
TROUGH MONDAY NIGHT AND ACROSS SOUTHERN CALIFORNIA TUESDAY MORNING.
WILL KEEP MENTION OF TUESDAY MORNING SHOWERS IN THE EXTENDED
FORECAST...THEN DECREASING CLOUDS AND BECOMING PARTLY CLOUDY AND
CONTINUED UNSEASONABLY COOL FOR THE REMAINDER OF THE EXTENDED
FORECAST PERIOD.

POPS FAT 5204 BFL 4204 YNP 7536. SANGER

.HNX...SNOW ADVISORY UNTIL 1100 PM FOR THE SOUTHERN SIERRA NEVADA
       ABOVE 4000 FEET FROM YOSEMITE NATIONAL PARK TO THE KERN
       COUNTY LINE.
    ...WIND ADVISORY UNTIL 1100 PM FOR THE KERN COUNTY MOUNTAINS.
    ...WIND ADVISORY UNTIL 1100 PM FOR THE KERN COUNTY DESERTS.
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