Area Forecast Discussion
Issued by NWS San Joaquin Valley, CA

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000
FXUS66 KHNX 281122
AFDHNX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY - HANFORD CA
422 AM PDT FRI AUG 28 2015

.SYNOPSIS...
DRY WEATHER CAN BE EXPECTED OVER INTERIOR CENTRAL CALIFORNIA FOR
THE NEXT SEVERAL DAYS. TEMPERATURES WILL REMAIN SEVERAL DEGREES ABOVE
NORMAL TODAY AS A RIDGE OF HIGH PRESSURE LINGERS OVER THE REGION.
BY THE WEEKEND...TEMPERATURES WILL COOL TO SLIGHTLY BELOW
AVERAGE...AND LOCALLY BREEZY CONDITIONS ARE EXPECTED AS A LOW
PRESSURE SYSTEM IMPACTS THE REGION.

&&

.DISCUSSION...
THE UPPER LEVEL RIDGE OVER THE WESTERN US CONTINUES TO BRING
TEMPERATURES AROUND 5-10 DEGREES ABOVE CLIMO ACROSS CENTRAL
CALIFORNIA. TODAY WILL BE SIMILAR OR EVEN A DEGREE OR SO WARMER
THAN YESTERDAY UNDER THE WARM SIDE OF THE RETREATING RIDGE. AN
ELONGATED TROUGH OVER THE NORTHEAST PACIFIC WILL CONTINUE TO
DISPLACE THE RIDGE THROUGH THE WEEKEND AS SHORTWAVE ENERGY SWINGS
INLAND. THIS WILL BRING A PUSH OF MARINE COOLED AIR INTO THE SJ
VALLEY WHICH IN COMBINATION WITH THE SYNOPTIC COOLING WILL PRODUCE
A SIGNIFICANT COOLDOWN OVER OUR AREA. THE INITIAL SURGE WILL DROP
TEMPERATURES AROUND 6-12 DEGREES SATURDAY...FALLING FURTHER TO
AROUND 5-10 DEGREES BELOW SEASONAL AVERAGES BY SUNDAY.

THE STRENGTHENING ONSHORE SURFACE PRESSURE GRADIENTS ALONG WITH
THE MARKED CHANGE IN AIRMASS AND UPPER LEVEL JET ENERGY SUPPORT
WILL BRING GUSTY WINDS...ESPECIALLY THROUGH AND BELOW MOUNTAIN
PASSES AND OVER THE SIERRA CREST BY THIS EVENING AND AGAIN
SATURDAY NIGHT WITH THE SECOND SURGE. THESE WINDS MAY KICK UP
AREAS OF BLOWING DUST ALONG THE WEST SIDE OF THE SJ VALLEY. SOME
LIMITED MOISTURE ACCOMPANYING THE PASSING TROUGH MAY PRODUCE
UPSLOPE CLOUDINESS IN THE VALLEY FACING SLOPES OF THE KERN COUNTY
MOUNTAINS BUT MODELS DO NOT PROG ANY ASSOCIATED PRECIPITATION.

MODEL CONSISTENCY IS GOOD INTO THE END OF NEXT WEEK...KEEPING A
TROUGHY PATTERN OVER THE WEST COAST. EXPECT A SLIGHT WARMUP AS THE
TROUGH WEAKENS SOME...BUT TEMPERATURES SHOULD REMAIN AT OR BELOW
CLIMO THROUGH THE PERIOD WITH NO PRECIPITATION EXPECTED.

&&

.AVIATION...
LOCAL MVFR/IFR VISIBILITIES CAN BE EXPECTED IN THE FOOTHILLS AND
HIGHER ELEVATIONS OF THE SIERRA DUE TO SMOKE. VFR CONDITIONS WILL
PREVAIL ELSEWHERE ACROSS THE CENTRAL CALIFORNIA INTERIOR DURING THE
NEXT 24 HOURS.

&&

.AIR QUALITY ISSUES...
ON FRIDAY AUGUST 28 2015... UNHEALTHY FOR SENSITIVE GROUPS IN
FRESNO COUNTY AND SEQUOIA NATIONAL PARK AND FOREST.
FURTHER INFORMATION IS AVAILABLE AT VALLEYAIR.ORG

&&

.CERTAINTY...

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

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 08-28      108:1924     78:1953     77:1894     52:1907
KFAT 08-29      109:1915     79:2010     76:1915     52:1895
KFAT 08-30      109:1988     80:1957     81:2007     49:1966

KBFL 08-28      109:1944     71:1911     78:1972     48:1903
KBFL 08-29      109:1915     77:1911     85:1909     45:1903
KBFL 08-30      108:1988     80:1957     85:1909     45:1912
&&

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

$$

PUBLIC...JEB
AVN/FW...DURFEE
SYNOPSIS...JEB

WEATHER.GOV/HANFORD


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