Special Weather Statement, NWS Hanford, CA

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY - HANFORD CA
315 PM PDT THU AUG 9 2012

.SYNOPSIS...
HIGH PRESSURE RIDGING IS THE DOMINANT FEATURE FOR THE CENTRAL
INTERIOR. TEMPERATURES CAN BE EXPECTED TO RISE SLOWLY AND PEAK TO A
MAXIMUM BY THE WEEKEND.

&&

...UPDATED FORECAST FOR SLIGHT CHANCE OF THUNDERSTORMS NEAR
EDWARDS AFB...

.DISCUSSION...

HAVE MADE AN UPDATE THROUGH THIS EVENING TO INCLUDE A SLIGHT
CHANCE OF THUNDERSTORMS FOR FAR SE KERN COUNTY...ESPECIALLY IN AND
AROUND EDWARDS AFB...SOME OUTFLOW WINDS COULD ALLOW A FEW CELLS TO
DEVELOP OVER THE NEXT FEW HRS. SOME THUNDERSTORMS HAVE DEVELOPED
SOUTH AND SOUTHEAST OF EDWARDS AFB DURING THE LAST HOUR OR SO.

TEMPS REMAIN A FEW DEG WARMER COMPARED TO 24 HRS AGO OVER MUCH OF
INTERIOR CENTRAL CA. SATELLITE IMAGERY SHOWING TYPICAL DIURNAL
CUMULUS BUILDUPS OVER SIERRA...ALTHOUGH SOMEWHAT LESS COVERAGE
THAN THIS TIME YESTERDAY. THERE IS PLENTY OF MID-LEVEL MOISTURE
OVER SOUTHERN CA...SUFFICIENT FOR SOME THUNDERSTORM DEVELOPMENT
OVER THE SAN BERNARDINO MOUNTAINS AND THE DESERT AREAS TO THE
NORTH AND NORTHWEST. SOME ISOLATED THUNDERSTORMS COULD FORM OVER
THE SIERRA CREST LATER THIS AFTERNOON BUT WILL LIKELY BE SHORT-
LIVED AS WE GET CLOSER TO SUNSET.

STRONG UPPER-LEVEL RIDGE OF HIGH PRESSURE REMAINS IN CONTROL OVER
THE WESTERN U.S. AND CONTINUES TO MOVE WESTWARD. TEMPS WILL LIKELY
PEAK DURING FRIDAY AND SATURDAY...A SLIGHT WEAKENING IN THE RIDGE
IS EXPECTED OCCUR BY SUNDAY SO THAT TEMPERATURES MAY SLIGHTLY
DECREASE. HOWEVER...TEMPERATURES WILL REMAIN WELL ABOVE AVERAGE ON
SUNDAY. HIGH TEMPS ARE EXPECTED TO REMAIN AT OR ABOVE 105 IN MOST
LOCATIONS IN THE SJ VALLEY...SIERRA FOOTHILLS AS WELL AS THE LOWER
ELEVATIONS OF THE KERN COUNTY MOUNTAINS...WITH THE WARMEST
LOCATIONS EXCEEDING 110 DEGREES THROUGH AT LEAST SUNDAY. MINIMUM
TEMPS ARE EXPECTED TO FALL TO ONLY INTO THE LOWER 80S IN THE
WARMEST LOCATIONS IN THESE AREAS ON SAT AND SUN MORNINGS.
THEREFORE...WE HAVE UPGRADED THE EXCESSIVE HEAT WATCH TO A
WARNING. TEMPS IN THE DESERT LOCATIONS WILL ALSO REMAIN WELL ABOVE
AVERAGE WITH THE WARMEST LOCATIONS ALSO ABOVE 110 DEGREES BUT ARE
EXPECTED TO COOL ENOUGH AT NIGHT IN TERMS OF LOW TEMPERATURES.
HUMIDITY IS EXPECTED TO REMAIN LOW ENOUGH SO THAT HEAT INDEX
VALUES WILL LIKELY REMAIN AT OR JUST BELOW 80 DEG DURING THE
OVERNIGHT AND MORNING HOURS IN MOST DESERT LOCATIONS. IN TERMS OF
CONVECTIVE POTENTIAL...SLIGHT CHANCE POPS ARE CONFINED MAINLY TO
THE SIERRA CREST DUE TO DIURNAL HEATING THRU THIS WEEKEND AND EVEN
INTO NEXT WEEK. MOISTURE REMAINS LIMITED AND WILL LIKELY PRECLUDE
ISOLATED THUNDERSTORM DEVELOPMENT BEYOND THE HIGHER ELEVATIONS OF
THE SIERRA NEVADA. THERE IS A SOMEWHAT HIGHER CHANCE ON SATURDAY
FOR ISOLATED THUNDERSTORM DEVELOPMENT OVER THE SIERRA AS THERE
WILL LIKELY BE AN INCREASE IN MID-LEVEL MOISTURE.

BY EARLY NEXT WEEK...TEMPERATURES ARE EXPECTED TO BE NOT AS WARM
BUT STILL SLIGHTLY ABOVE AVERAGE. MODELS SHOW RIDGING RETREATING
EASTWARD...ALTHOUGH THERE IS MINOR MODEL DISAGREEMENT IN TERMS OF
DEVELOPING TROUGHING NEAR THE COAST. HAVE MADE SOME MINOR COOLING
TO FORECAST TEMPS IN EXTENDED...AND ARE ANTICIPATED TO RETURN
CLOSER TO AVERAGE OR PERHAPS SLIGHTLY BELOW BY THE MIDDLE OF NEXT
WEEK...WITH A DRIER SOUTHWEST FLOW IN PLACE.

&&

.AVIATION...
ISOLATED THUNDERSTORMS ARE POSSIBLE UNTIL 04Z FRI AND AFTER 19Z FRI
OVER THE SOUTHERN SIERRA NEVADA. OTHERWISE...VFR CONDITIONS ARE
EXPECTED ACROSS THE CENTRAL CA INTERIOR THRU 00Z SAT.

&&

.AIR QUALITY ISSUES...
ON THURSDAY AUGUST 9 2012... UNHEALTHY FOR SENSITIVE GROUPS IN
FRESNO AND KERN 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 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.

&&

.HNX WATCHES/WARNINGS/ADVISORIES...
EXCESSIVE HEAT WARNING FROM NOON FRIDAY TO 11 PM PDT SUNDAY
BELOW 4000 FEET FOR THE CAZ095.

EXCESSIVE HEAT WARNING FROM NOON FRIDAY TO 11 PM PDT SUNDAY
CAZ089>094.

&&

PUBLIC...BSO
AVN/FW...DS
SYNOPSIS...PJ

WEATHER.GOV/HANFORD

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY - HANFORD CA
125 PM PDT THU AUG 9 2012

CAZ089>095-102030-
WEST CENTRAL SAN JOAQUIN VALLEY-EAST CENTRAL SAN JOAQUIN VALLEY-
SOUTHWESTERN SAN JOAQUIN VALLEY-SOUTHEASTERN SAN JOAQUIN VALLEY-
MARIPOSA MADERA AND FRESNO COUNTY FOOTHILLS-
TULARE COUNTY FOOTHILLS-KERN COUNTY MOUNTAINS-
125 PM PDT THU AUG 9 2012

...EXCESSIVE HEAT WARNING...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE CENTRAL AND SOUTHERN
SAN JOAQUIN VALLEY AND THE FOOTHILLS OF THE SOUTHERN SIERRA
NEVADA AND THE KERN COUNTY MOUNTAINS.

.DAY ONE...THIS AFTERNOON AND TONIGHT

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

AN EXCESSIVE HEAT WARNING IS IN EFFECT FROM FRIDAY AFTERNOON THROUGH
SUNDAY EVENING FOR THE VALLEY AND FOOTHILLS AND FOR ELEVATIONS BELOW
4000 FEET IN THE KERN COUNTY MOUNTAINS. REFER TO THE LATEST NON-
PRECIPITATION STATEMENT /SFONPWHNX/ FOR MORE DETAILS.

.SPOTTER INFORMATION STATEMENT...

SKYWARN SPOTTER ACTIVATION IS NOT ANTICIPATED.

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT ANY SIGNIFICANT OR
UNUSUAL CONDITIONS TO THE NATIONAL WEATHER SERVICE.

JONES

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY CA
346 PM PDT THU AUG 9 2012

CAZ099-092330-
KERN CA-
346 PM PDT THU AUG 9 2012

THE NATIONAL WEATHER SERVICE IN HANFORD HAS ISSUED A

SIGNIFICANT WEATHER ADVISORY FOR...
  SOUTHEASTERN KERN COUNTY IN CENTRAL CALIFORNIA

UNTIL 430 PM PDT

AT 337 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THAT
A THUNDERSTORM WAS RAPIDLY DEVELOPING 13 MILES EAST OF EDWARDS
AFB..MOVING NORTHWEST AT 10 MPH.

WIND GUSTS UP TO 40 MPH ARE EXPECTED WITH THIS STORM. AREAS OF
BLOWING DUST ARE POSSIBLE WITH REDUCED VISIBILITY.

LOCATIONS IMPACTED INCLUDE...
  BORON...RANDSBURG...RURAL SOUTHEASTERN KERN COUNTY...HIGHWAY 14
SOUTH OF MOJAVE.

IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A
STURDY BUILDING.

LAT...LON 3500 11827 3532 11763 3484 11768 3483 11815
TIME...MOT...LOC 2244Z 127DEG 8KT 3488 11772

SANGER

WEATHER.GOV/HANFORD