Sierra Nevada from Yosemite to K (California)
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY - HANFORD CA
425 AM PDT SAT SEP 26 2009
CAZ089>099-262200-
WEST CENTRAL SAN JOAQUIN VALLEY-EAST CENTRAL SAN JOAQUIN VALLEY-
SOUTHWESTERN SAN JOAQUIN VALLEY-SOUTHEASTERN SAN JOAQUIN VALLEY-
MARIPOSA MADERA AND FRESNO COUNTY FOOTHILLS-
TULARE COUNTY FOOTHILLS-KERN COUNTY MOUNTAINS-
SIERRA NEVADA FROM YOSEMITE TO KINGS CANYON-
TULARE COUNTY MOUNTAINS-INDIAN WELLS VALLEY-
SOUTHEASTERN KERN COUNTY DESERT-
425 AM PDT SAT SEP 26 2009
...BIG CHANGES IN STORE TO CENTRAL CALIFORNIA INTERIOR NEXT WEEK
WITH BREEZY CONDITIONS AND SIGNIFICANTLY COOLER TEMPERATURES...
THE UPPER RIDGE THAT HAS DOMINATED OUR WEATHER PATTERN FOR THE
PAST SEVERAL DAYS WITH RECORD HEAT AND SUMMER LIKE CONDITIONS WILL
BEGIN TO BREAK DOWN ON SUNDAY AS A STRONG UPPER LOW IS EXPECTED TO
MOVE OUT OF THE GULF OF ALASKA ON MONDAY AND SWEEP THROUGH THE
REGION BY WEDNESDAY.
TEMPERATURES WILL GRADUALLY DECREASE ON SUNDAY AS THE RIDGE
CONTINUES TO BREAK DOWN AND SHIFT EAST. SOME SUB TROPICAL MOISTURE
IS FORECAST TO BE LIFTED NORTH OVER THE AREA AS THE INITIAL COLD
FRONT MOVES THROUGH MONDAY AFTERNOON AND EVENING...PROVIDING THE
POSSIBILITY OF DRY THUNDERSTORMS ACROSS THE CREST OF THE SIERRA.
SIGNIFICANTLY COOLER TEMPERATURES AND BREEZY CONDITIONS ARE
EXPECTED ON TUESDAY AND WEDNESDAY AS THE UPPER LEVEL TROUGH AXIS
MOVES ACROSS THE REGION. WE ARE EXPECTING HIGH TEMPERATURES ON
WEDNESDAY TO BE AROUND 5 TO 15 DEGREES BELOW NORMAL.
THE MOUNTAINS WILL SEE VERY WINDY CONDITIONS WITH VERY COLD WIND
CHILL VALUES ON TUESDAY NIGHT. CAMPERS AND RECREATIONAL INTERESTS
NEED TO BE PREPARED FOR RAPIDLY CHANGING WEATHER CONDITIONS ON
TUESDAY AND WEDNESDAY AS SIGNIFICANTLY COLDER AIR MOVES INTO THE
AREA. EXTRA LAYERS OF CLOTHING AND PROTECTION AGAINST HYPOTHERMIA
WILL BE REQUIRED FOR RAPIDLY CHANGING WEATHER CONDITIONS.
WINDY CONDITIONS IN THE SIERRA ARE EXPECTED TUESDAY WITH NW WINDS
25 TO 40 MPH WITH GUSTS TO 60 MPH THROUGH THE CANYONS AND PASSES
ABOVE 8000 FEET. WINDY CONDITIONS ARE ALSO EXPECTED THROUGH THE KERN
COUNTY MOUNTAINS...WITH NW WINDS 20 TO 30 MPH WITH GUSTS TO 45 MPH
THROUGH THE GRAPEVINE AND THE TEHACHAPI PASSES. THIS KIND OF WIND
SPEEDS CAN DANGEROUSLY IMPACT TRAVEL ON HIGH PROFILE VEHICLES SUCH
AS TRACTOR TRAILERS AND CAMPERS.
A GRADUAL WARM UP IS EXPECTED THURSDAY AND INTO FRIDAY...BUT TO ONLY
NEAR NORMAL FALL-LIKE VALUES.
$$
JDB
WEATHER.GOV/HANFORD