NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY - HANFORD CA
514 AM PST WED FEB 4 2009
...WARM AND DRY CONDITIONS COMING TO AN END OVER THE CENTRAL CALIFORNIA INTERIOR...
A LOW PRESSURE SYSTEM OVER THE NORTHEAST PACIFC OCEAN WILL NEAR THE CENTRAL
CALIFORNIA COAST THIS EVENING...BRINGING A CHANGE IN THE WEATHER AFTER TODAY.
THE SOUTHERLY FLOW AHEAD OF THIS SYSTEM WILL KEEP GUSTY SOUTH WINDS BLOWING ALONG
INTERSTATE 5 OVER THE GRAPEVINE AND EXTENDING INTO THE EXTREME SOUTH END OF THE SAN
JOAQUIN VALLEY NEAR THE BASE OF THE GRAPEVINE. WINDS WILL ALSO INCREASE THROUGH THE
PASSES AND HIGHER ELEVATIONS ALONG THE WEST SIDE OF THE VALLEY BY THIS EVENING. SPEEDS
OF 15 TO 25 MPH WITH GUSTS UP TO 45 MPH CAN BE EXPECTED IN THESE AREAS THROUGH LATER
TONIGHT.
THE WINDS ARE WARMING AS THEY FUNNEL THROUGH TEJON PASS AND DESCEND TO THE VALLEY
FLOOR. THIS WILL RESULT IN NEAR RECORD TEMPERATURES IN THE SOUTH END OF THE VALLEY
AGAIN TODAY...WITH WELL ABOVE NORMAL TEMPERATURES THROUGHOUT INTERIOR CENTRAL
CALIFORNIA.
THE INITIAL SYSTEM WILL MOVE INLAND LATE TONIGHT INTO THURSDAY NIGHT...SPREADING RAIN
AND HIGHER ELEVATION SNOW ACROSS THE
REGION...WITH SNOW LEVELS REMAINING RELATIVELY HIGH INITIALLY. A SECONDARY SOMEWHAT
COLDER SYSTEM WILL PUSH THROUGH THE REGION
FRIDAY INTO SATURDAY...LOWERING SNOW LEVELS TO ABOUT 5000 FEET. TOTAL ACCUMULATIONS
AROUND 12 TO 18 INCHES ARE POSSIBLE OVER THE
HIGHER ELEVATIONS OF THE SIERRA NEVADA BEFORE PRECIPITATION TAPERS OFF SATURDAY AS
THE SYSTEM EXITS THE REGION. A FEW INCHES OF SNOW MAY ACCUMULATE OVER THE HIGHER
ELEVATIONS OF THE KERN COUNTY MOUNTAINS...BUT SNOW IS EXPECTED TO REMAIN ABOVE PASS
LEVELS.
AS THE UPPER LEVEL LOW TRACKS ACROSS THE AREA FRIDAY...THE ATMOSPHERE WILL BECOME
MORE UNSTABLE. THIS WILL BRING A SLIGHT CHANCE OF THUNDERSTORMS TO THE VALLEY FRIDAY
AFTERNOON AND EVENING...WITH HEAVY RAIN...GUSTY WINDS AND SMALL HAIL POSSIBLE.
THE COOLER AIR AND CLOUDS AND RAIN ACCOMPANYING THE SYSTEMS WILL RETURN SEASONABLY
COOL TEMPERATURES TO THE REGION BEGINNING
THURSDAY. ADDITIONAL PASSING DISTURBANCES SHOULD MAINTAIN THE RELATIVELY COOL AND
UNSETTLED CONDITIONS THROUGH EARLY NEXT WEEK.
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SITUATION