High Wind and Strong Wind in California, April 11 to 12, 2007

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY - HANFORD CA
836 AM PDT WED APR 11 2007

.DISCUSSION...VIS LOOP INDICATING MID LEVEL CLOUD BAND SPREADING
SOUTHWARD ACROSS THE NORTHERN HALF OF OUR CWFA AT THIS TIME WITH
KHNX 88D INDICATING SOME LIGHT PRECIPITATION OVER THE CENTRAL SAN
JOAQUIN VALLEY...MUCH OF WHICH IS NOT REACHING THE SURFACE BASED
ON MESOWEST...RAWS AND METAR OBSERVATIONS. THE BAND IS AHEAD OF A
COLD FRONT CURRENTLY SITUATED OVER THE NORTH BAY AREA. THE COLD
FRONT IS PROGGED BY THE 12Z WRF TO PUSH RAPIDLY SOUTHEAST AND
CROSS OUR CWFA BY THIS AFTERNOON.

TEMPERATURES APPEAR ON TRACK TO REACH PROJECTED MAX/S TODAY WHICH ARE
ACTUALLY BELOW CLIMO FOR THE FIRST TIME ALL MONTH AS THE COLDER
AIR BEHIND THE FRONT PUSHES INTO CENTRAL CA THIS AFTERNOON. AM NOT
PLANNING ANY UPDATES THIS MORNING AS THE CURRENT FORECAST LOOKS TO
BE ON TARGET FOR TODAY.

ALTHOUGH SURFACE P-GRADS HAVE RELAXED QUITE A BIT OVERNIGHT...THEY
ARE EXPECTED TO STRENGTHEN AGAIN BEHIND THE COLD FRONT AS 12Z WRF
IS INDICATING KSFO-KLAS OVER 16MB BY 00Z THURSDAY. THIS COMBINED
WITH THE UPPER SUPPORT OF AT 150KT 250MB JET WILL PRODUCE STRONG
WINDS OVER THE MOUNTAINS AND KERN DESERTS TONIGHT THURSDAY AND AM
FAVORING UPGRADING THE HIGH WIND WATCH CURRENTLY IN EFFECT FOR THE
KERN MOUNTAINS AND DESERTS TO A HIGH WIND WARNING WITH THE
AFTERNOON PACKAGE.

OF LESSER CONCERN IS THE PRECIPITATION POTENTIAL WITH THIS SYSTEM
WITH THE DEEPER MOISTURE REMAINING NORTH OF OUR CWFA. THERE EXISTS
A GOOD CHANCE OF LIGHT PRECIPITATION TODAY FOR MERCED AND MARIPOSA
COUNTIES WITH THE MOISTURE BAND CURRENTLY MOVING THROUGH THE AREA.
THERE WILL ALSO BE A CHANCE OF SHOWERS TONIGHT OVER THE MOUNTAINS
IN THE UNSTABLE AIRMASS BEHIND THE COLD FRONT. AS A SECONDARY VORT
DROPS SOUTHWARD BEHIND THE DEPARTING TROUGH OVER THE GREAT BASIN
ON THURSDAY...IT WILL KEEP THE WINDY CONDITIONS OVER THE MOUNTAINS
AND KERN DESERTS AND MIGHT PROVIDE ENOUGH LIFT FOR SOME SHOWERS
OVER THE MOUNTAINS ON THURSDAY BEFORE A DRY RIDGE BUILDS INTO
CENTRAL CA THURSDAY NIGHT AND FRIDAY WHICH WILL ALLOW FOR THE
WINDS TO SUBSIDE. THAT IS UNTIL ANOTHER FAST MOVING S/W TROUGH
CROSSES NORCAL AS PROGGED OVER THE WEEKEND AND BRINGS ANOTHER
PERIOD OF WINDY CONDITIONS TO THE MOUNTAINS AND KERN DESERTS.

&&

.AVIATION...LOCAL MVFR CEILINGS AND VISIBILITIES CAN BE EXPECTED
IN AREAS OF RAIN AND HIGHER ELEVATION SNOW AFTER 15Z...OBSCURING
MOUNTAINS. OTHERWISE...VFR CONDITIONS WILL PREVAIL ACROSS THE
CENTRAL CA INTERIOR THROUGH 12Z THURSDAY. FOR SPECIFIC DETAILS IN
THE NEXT 12 TO 24 HOURS...PLEASE REFER TO THE TAFS FOR KMCE...KFAT
AND KBFL AND TWEB ROUTES 421 AND 423.

&&

.AIR QUALITY ISSUES...NONE.

&&

.HNX WATCHES/WARNINGS/ADVISORIES...
WIND ADVISORY UNTIL 12 PM PDT THURSDAY FOR CAZ096-097.

WIND ADVISORY UNTIL 11 PM PDT THIS EVENING FOR CAZ095-098-099.

HIGH WIND WATCH FROM THIS EVENING THROUGH THURSDAY AFTERNOON FOR
CAZ095-098-099.

&&

PUBLIC: DS
AVIATION: DCH

WEATHER.GOV/HANFORD

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY - HANFORD CA
430 AM PDT WED APR 11 2007

CAZ095-098-099-121130-
KERN COUNTY MOUNTAINS-INDIAN WELLS VALLEY-
SOUTHEASTERN KERN COUNTY DESERT-
430 AM PDT WED APR 11 2007

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE SOUTHEASTERN KERN
COUNTY MOUNTAINS...THE KERN COUNTY DESERT...AND THE INDIAN WELLS
VALLEY.

A TRAILING COLD FRONT FROM A PACIFIC STORM SYSTEM SCUTTLES ACROSS
THE FORECAST AREA TODAY AND EARLY THURSDAY. BEING REINFORCED BY A
SECOND SURGE OF COLD AIR, AIDED BY A 130-KT JET ALOFT...SIMPLY
ADDS UP TO A WINDY PERIOD WEDNESDAY AND EARLY THURSDAY.

DAY ONE...THIS WEDNESDAY.

A WIND ADVISORY IS IN EFFECT FROM 6 AM PDT THIS MORNING UNTIL 11
PM PDT...FOR THE INDIAN WELLS VALLEY AND THE KERN COUNTY MOUNTAINS
AND DESERT. IN ADDITION, FOR THE SAME GEOGRAPHICAL AREA, A HIGH
WIND WATCH IS IN EFFECT FROM LATE THIS EVENING THROUGH THURSDAY
MORNING.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

A HIGH WIND WATCH REMAINS IN EFFECT THROUGH THURSDAY MORNING FOR
THE KERN COUNTY MOUNTAINS AND DESERT, IN ADDITION TO THE INDIAN
WELLS VALLEY.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS TO THE SAN JOAQUIN VALLEY NATIONAL WEATHER SERVICE
OFFICE.

WEATHER.GOV/HANFORD

CAZ096-097-121130-
SIERRA NEVADA FROM YOSEMITE TO KINGS CANYON-
TULARE COUNTY MOUNTAINS-
430 AM PDT WED APR 11 2007

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE HIGHER ELEVATIONS OF
THE SOUTHERN SIERRA NEVADA.

.DAY ONE...THIS WEDNESDAY.

 A WIND ADVISORY IS IN EFFECT FROM 6 AM PDT THIS MORNING UNTIL 12
PM PDT THURSDAY FOR THE SIERRA NEVADA FROM YOSEMITE TO THE TULARE
COUNTY MOUNTAINS.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH SATURDAY.

A WIND ADVISORY CONTINUES IN THE SIERRA NEVADA FROM YOSEMITE TO
THE TULARE COUNTY MOUNTAINS UNTIL 12 PM PDT THURSDAY.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS TO THE SAN JOAQUIN VALLEY NATIONAL WEATHER SERVICE
OFFICE.

RC

WEATHER.GOV/HANFORD