Area Forecast Discussion
Issued by NWS San Joaquin Valley, CA

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FXUS66 KHNX 021018
AFDHNX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY - HANFORD CA
318 AM PDT WED SEP 2 2015

.SYNOPSIS...A COOLING TREND WILL TAKE PLACE OVER THE CENTRAL
CALIFORNIA INTERIOR DURING THE NEXT FEW DAYS. TEMPERATURES WILL
AVERAGE SEVERAL DEGREES BELOW NORMAL BY FRIDAY AND SATURDAY.
WINDS WILL BE GUSTY THROUGH AND BELOW THE KERN COUNTY MOUNTAIN
PASSES AND ON THE WEST SIDE OF THE SAN JOAQUIN VALLEY THROUGH
FRIDAY EVENING. TEMPERATURES WILL WARM TO SEASONABLE LEVELS BY
LABOR DAY. OTHERWISE...DRY WEATHER IS EXPECTED THROUGH THE
HOLIDAY WEEKEND.

&&

.DISCUSSION...
AN UPPER LOW OFF NEAR THE CHANNEL ISLANDS BRINGING SOME UPPER
LEVEL CLOUDS NORTH OVER THE KERN COUNTY AREA. OTHERWISE CLEAR AND
DRY ACROSS THE DISTRICT. WINDS HAVE BECOME BREEZY AND GUSTY BELOW
THE COASTAL MOUNTAIN PASSES ON THE WEST SIDE OF THE SAN JOAQUIN
VALLEY. THIS IS DUE TO THE PROXIMITY OF THE LOW ALLOWING THE MARINE
LAYER TO DEEPEN ALONG THE COAST NEAR 2400 FEET. THE MARINE AIR SHOULD
FILTER INTO THE SAN JOAQUIN VALLEY THIS MORNING USHERING IN THE
INITIAL SIGN OF A COMING COOL TREND. EXPECT THE MOST COOLING TODAY
IN THE SAN JOAQUIN VALLEY OTHERWISE ONLY LITTLE OR MINOR COOLING
FOR THE MOUNTAINS AND DESERT.

A BROAD UPPER LEVEL TROUGH OVER THE PACIFIC NORTHWEST WILL BRING
A SENSIBLE CHANGE AS IT DEEPENS ALONG THE WEST COAST DURING THE
NEXT COUPLE OF DAYS. SATELLITE IMAGES SHOW AN INITIAL COLD FRONT
ALREADY NEAR THE OR/CA BORDER.

ADDITIONAL SHORT WAVE ENERGY WILL DIG THE TROUGH SOUTH WELL INTO
SCA BY SATURDAY. THE TROUGH OVER THE PAC NW WILL BRING TWO DRY
COLD FRONTS THROUGH THE CENTRAL CA INTERIOR. A COLD FRONT WILL
PUSH SOUTH ACROSS THE DISTRICT THURSDAY WITH SECOND COLD FRONT
FOLLOWING A DAY LATER. EACH OF THESE COLD FRONTS WILL PRODUCE
GUSTY WINDS THROUGH AND BELOW THE KERN COUNTY MOUNTAIN PASSES AND
ALONG THE WEST SIDE OF THE SJ VLY WHERE SOME BLOWING DUST IS
POSSIBLE. OTHERWISE...THE COLD FRONTS WILL BRING LITTLE MORE THAN
HIGH CLOUDS WITH THEM.

NAEFS PROG 700MB HEIGHTS 1-2 SIGMAS BELOW NORMAL FRIDAY AND
SATURDAY. THUS COOL BELOW NORMAL TEMPERATURES WILL BE LIKELY
THURSDAY THROUGH SATURDAY.

TEMPERATURES WILL RECOVER TO NEAR NORMAL BY SUNDAY AFTERNOON AS
THE UPPER LEVEL TROUGH WEAKENS AND LIFTS NORTHWARD. LABOR DAY AND
NEXT TUESDAY WILL BECOME SLIGHTLY WARMER AS AN UPPER LEVEL RIDGE
OVER SOUTH U.S. BUILDS WESTWARD INTO SOUTHERN CA. OTHERWISE THE
WEATHER PATTERN WILL REMAIN DRY FOR AT LEAST THE NEXT 7 DAYS.

&&

.AVIATION...
AREAS OF MVFR AND LOCAL IFR VISIBILITIES CAN BE EXPECTED IN THE
FOOTHILLS AND HIGHER ELEVATIONS OF THE SOUTHERN SIERRA NEVADA DUE TO
SMOKE. OTHERWISE...VFR CONDITIONS WILL PREVAIL ACROSS THE CENTRAL CA
INTERIOR DURING THE NEXT 24 HOURS.

&&

.AIR QUALITY ISSUES...
NONE.

&&

.CERTAINTY...

THE LEVEL OF CERTAINTY FOR DAYS 1 AND 2 IS HIGH.
THE LEVEL OF CERTAINTY FOR DAYS 3 THROUGH 7 IS MEDIUM.

THIS INFORMATION IS PROVIDED AS PART OF A TRIAL PROJECT CONDUCTED
BY THE NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY - HANFORD.
CERTAINTY LEVELS INCLUDE LOW...MEDIUM...AND HIGH. PLEASE VISIT
WWW.WEATHER.GOV/HNX/CERTAINTY.PHP /ALL LOWER CASE/ FOR ADDITIONAL
INFORMATION AND/OR TO PROVIDE FEEDBACK.

&&

.CLIMATE...
             RECORDS
SITE DATE    HI_MAX:YEAR LO_MAX:YEAR HI_MIN:YEAR LO_MIN:YEAR

KFAT 09-02      108:1955     76:2000     77:1998     48:1964
KFAT 09-03      111:1955     71:1912     77:2003     52:1964
KFAT 09-04      107:1988     74:1912     75:1998     51:1912

KBFL 09-02      110:1955     74:1910     78:1998     50:1913
KBFL 09-03      112:1955     78:1985     78:1998     50:1913
KBFL 09-04      109:1988     77:1936     77:1950     49:1915
&&

.HNX WATCHES/WARNINGS/ADVISORIES...
NONE.
&&

$$

PUBLIC...MV
AVN/FW...BEAN
PREV DISCUSSION...DURFEE
SYNOPSIS...MV

WEATHER.GOV/HANFORD



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