Area Forecast Discussion
Issued by NWS San Joaquin Valley, CA

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FXUS66 KHNX 010145 CCA
AFDHNX

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY - HANFORD CA
644 PM PDT TUE JUN 30 2015

.UPDATE...
UPDATED AIR QUALITY ISSUES SECTION.

&&

.SYNOPSIS...
MOSTLY CLEAR SKIES EXCEPT FOR SHOWERS AND THUNDERSTORMS
ALONG THE SIERRA NEVADA. HIGH PRESSURE SETTLING OVER THE
AREA...DECREASING THE TROPICAL MOISTURE WHILE INCREASING
TEMPERATURES WELL ABOVE CLIMO.

&&

.PREV DISCUSSION... /ISSUED 401 PM PDT TUE JUN 30 2015/

DISCUSSION...
THE MID/UPPER LEVEL HIGH PRESSURE AREA TO OUR EAST CONTINUES TO
SPIN MOISTURE ACROSS OUR AREA AND SCATTERED THUNDERSTORMS HAVE
DEVELOPED THIS AFTERNOON ACROSS THE SOUTHERN SIERRA. A FEW CELLS
ARE ALSO INDICATED ON RADAR MOVING NORTHWEST TOWARD KERN COUNTY.
CURRENT CONVECTIVE ACTIVITY IS EXPECTED TO END THIS EVENING.

24 HR TEMPERATURE TRENDS ACROSS THE AREA ARE RUNNING UP AS MUCH
AS 7-14 DEGREES...WITH MOST SAN JOAQUIN VALLEY LOCATIONS INTO
TRIPLE DIGITS AND SOME DESERT SITES AROUND 110 DEGREES. RELATIVE
HUMIDITIES ARE HOWEVER GENERALLY DOWN A FEW TO SEVERAL PERCENTAGE
POINTS. THIS IS KEEPING HEAT INDEX READINGS BELOW AMBIENT
TEMPERATURES...HOWEVER IT IS STILL QUITE HOT. THERE WILL NOT BE
MUCH RELIEF OVERNIGHT AS CONDITIONS WILL BE RATHER WARM AND MUGGY.

MODELS STRETCH THE HIGH PRESSURE AREA FARTHER WEST WEDNESDAY...
ADDING A COUPLE MORE DEGREES TO OUR AFTERNOON HIGH TEMPERATURES
WHILE DRAGGING ANOTHER SLUG OF MOISTURE INTO THE AREA. THIS WILL
BRING MORE THUNDERSTORM CHANCES TO THE MOUNTAIN AND DESERT AREAS
TOMORROW...POSSIBLY IN THE DESERT ZONES BY MORNING ACCORDING TO
SHORT TERM HIGH RES MODELS. PERSONS WILL NEED TO CONTINUE TO TAKE
EXTRA CARE IN THE VERY HOT CONDITIONS.

MODELS REMAIN IN AGREEMENT ON TRACKING THE HIGH PRESSURE CENTER
BACK TO THE EAST AFTER WEDNESDAY. THIS WILL KNOCK TEMPERATURES
BACK SEVERAL DEGREES BUT STILL A FEW DEGREES ABOVE CLIMO. WITH
CONTINUING SOUTHEAST FLOW THERE WILL REMAIN A POSSIBILITY OF
THUNDERSTORMS IN THE DESERT AND MOUNTAIN AREAS THROUGH FRIDAY.

A DRIER AND LESS HOT SOUTHWEST FLOW WILL DEVELOP FOR THE WEEKEND
INTO EARLY NEXT WEEK AS THE HIGH WEAKENS WHILE A LOW PRESSURE
SYSTEM MOVES TOWARD THE NORTHERN CALIFORNIA COAST.

&&

AVIATION...
ISOLATED THUNDERSTORMS CAN BE EXPECTED OVER THE MOUNTAINS AND KERN
COUNTY DESERTS BETWEEN THRU 04Z WED AND AGAIN AFTER 18Z WED WITH
LOCAL MVFR CEILINGS POSSIBLE OVER THE HIGHER ELEVATIONS OF THE
SIERRA. OTHERWISE...VFR CONDITIONS WILL PREVAIL THROUGHOUT THE
CENTRAL CALIFORNIA INTERIOR DURING THE NEXT 24 HOURS.

&&

.AIR QUALITY ISSUES...
ON WEDNESDAY JULY 1 2015... UNHEALTHY IN FRESNO AND KERN COUNTIES.
UNHEALTHY FOR SENSITIVE GROUPS IN KINGS... MADERA... MERCED AND
TULARE COUNTIES 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 06-30      112:1891     68:1982     79:2013     53:1970
KFAT 07-01      114:1891     82:1982     80:1934     53:1975
KFAT 07-02      110:1942     78:1916     78:2013     51:1956

KBFL 06-30      111:1950     78:1997     82:2009     44:1907
KBFL 07-01      115:1950     83:1911     81:2013     50:1913
KBFL 07-02      114:1950     80:1902     83:2013     51:1913

&&

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

&&

$$

PUBLIC...JDB
AVN/FW...JDB
PREV DISCUSSION...JEB
SYNOPSIS...WP

WEATHER.GOV/HANFORD


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