Area Forecast Discussion
Issued by NWS San Joaquin Valley, CA

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000
FXUS66 KHNX 021000
AFDHNX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY - HANFORD CA
300 AM PDT SUN AUG 2 2015

.SYNOPSIS...
SHOWERS AND THUNDERSTORMS ARE POSSIBLE OVER THE SIERRA NEVADA THIS
AFTERNOON AND EVENING. OTHERWISE...A GRADUAL COOLING TREND WILL
TAKE PLACE OVER CENTRAL CALIFORNIA THROUGH TUESDAY WITH DRY
CONDITIONS.

&&

.DISCUSSION...
AN UPPER LEVEL TROUGH OVER THE EASTERN PACIFIC HELPED SHIFT THE
RIDGE OF HIGH PRESSURE...AND THE MONSOONAL MOISTURE...A BIT
FARTHER EAST SATURDAY. THIS KEPT THE SHOWERS AND THUNDERSTORMS
OVER THE HIGHER TERRAIN OF THE SIERRA NEVADA SATURDAY AFTERNOON
AND EVENING. THERE IS STILL ENOUGH MOISTURE AND INSTABILITY TO
GENERATE A FEW THUNDERSTORMS OVER THE HIGH SIERRA AGAIN THIS
AFTERNOON AND EVENING. THE MOISTURE WILL CONTINUE TO BE PUSHED
EASTWARD SO THAT BY MONDAY THE THUNDERSTORM THREAT WILL BE MINIMAL
AND LIMITED TO SIERRA CREST.

THE UPPER TROUGH WILL PROVIDE AN ONSHORE FLOW WITH TEMPERATURES
GRADUALLY TRENDING DOWNWARD THE NEXT FEW DAYS. TUESDAY LOOKS TO
BE THE COOLEST DAY OF THE WEEK...WITH VALLEY AND FOOTHILL
TEMPERATURES IN THE UPPER 80S TO MID 90S. THESE TEMPERATURES ARE
BETWEEN 2 AND 6 DEGREES BELOW NORMAL FOR THE BEGINNING OF AUGUST.

A SUBTLE WARMING TREND WILL OCCUR OVER CENTRAL CALIFORNIA
WEDNESDAY AND THURSDAY AS HIGH PRESSURE OVER SOUTHERN CALIFORNIA
SLOWLY NUDGES NORTH INTO THE AREA. THE UPPER LOW THAT WAS NEARLY
STATIONARY OVER THE EASTERN PACIFIC WILL BEGIN TO SLOWLY MOVE EAST
ON WEDNESDAY AND MOVE INTO THE SAN FRANCISCO BAY AREA FRIDAY AND
LIFT ACROSS NORTHERN CALIFORNIA SATURDAY. THIS WILL ALLOW
TEMPERATURES TO COOL A FEW DEGREES FRIDAY INTO AT LEAST THE FIRST
PART OF THE WEEKEND. THIS SYSTEM DOES NOT APPEAR TO HAVE MUCH
MOISTURE...SO EXPECT JUST SOME CLOUD COVER FOR THE END OF THE
WEEK.

&&

.AVIATION...
SCATTERED THUNDERSTORMS WITH LOCAL MVFR CEILINGS AND MOUNTAIN
OBSCURATIONS CAN BE EXPECTED OVER THE SIERRA 18Z SUNDAY THROUGH 06Z
MONDAY. OTHERWISE...VFR CONDITIONS WILL PREVAIL ACROSS THE CENTRAL
CALIFORNIA INTERIOR DURING THE NEXT 24 HOURS.

&&

.AIR QUALITY ISSUES...
ON SUNDAY AUGUST 2 2015... UNHEALTHY IN MADERA COUNTY. UNHEALTHY
FOR SENSITIVE GROUPS IN FRESNO AND TULARE COUNTIES.
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 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 08-02      112:1908     83:1953     82:1908     53:1956
KFAT 08-03      110:1946     80:1976     78:2014     55:1953
KFAT 08-04      110:1889     83:1976     82:1901     53:1956

KBFL 08-02      109:1979     86:1976     84:1977     53:1912
KBFL 08-03      112:1938     81:1953     81:1974     53:1912
KBFL 08-04      109:1901     85:1953     85:1909     53:1903
&&

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

$$

PUBLIC...BEAN
AVN/FW...JDB
SYNOPSIS...BEAN

WEATHER.GOV/HANFORD


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