Fire Weather Outlook Discussion
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000
FNUS28 KWNS 291925
FWDD38

DAY 3-8 FIRE WEATHER OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0225 PM CDT MON SEP 29 2014

VALID 011200Z - 071200Z

THE UPPER TROUGH OVER THE WESTERN U.S. WILL PROGRESS EASTWARD ACROSS
THE PLAINS/CENTRAL STATES TO NEW ENGLAND AND THE ATLANTIC COAST BY
DAY 6/SATURDAY. AT THE SFC...LOW PRESSURE OVER THE PLAINS ATTENDANT
TO PROGRESSIVE UPPER TROUGH WILL TRACK NEWD TOWARD THE GREAT LAKES
AND STRONG SFC COLD FRONT WILL SWEEP ACROSS THE PLAINS AND MUCH OF
THE EASTERN U.S. WIDESPREAD RAINFALL WILL ACCOMPANY THE FRONTAL
PASSAGE AND AS STRONG SFC HIGH PRESSURE BUILDS IN BEHIND THE COLD
FRONT...MUCH COOLER TEMPERATURES WILL OVERSPREAD MUCH OF THE U.S.
EAST OF THE ROCKIES.

ACROSS THE WEST...AN AMPLIFIED RIDGE OVER THE EASTERN PACIFIC WILL
DEVELOP EASTWARD TOWARD THE WEST COAST IN THE WAKE OF THE UPPER
TROUGH MOVING INTO THE PLAINS. THE UPPER RIDGE AXIS WILL REMAIN
NEAR/JUST OFFSHORE THE COAST THROUGH THE PERIOD. AS HIGH PRESSURE
BUILDS OVER THE GREAT BASIN...SURFACE PRESSURE GRADIENTS ACROSS THE
STATE WILL BECOME FAVORABLE FOR LIGHT TO MODERATE N/NE LOW LEVEL
FLOW. AT THIS TIME IT APPEARS THAT SFC WINDS WILL REMAIN TOO LIGHT
TO WARRANT ANY HIGHLIGHTS. HOWEVER...IN FAVORED CANYONS AND PASSES
AND WIND-PRONE AREAS OF THE SAN FRANCISCO BAY...SACRAMENTO VALLEY
AND ACROSS THE SOUTHERN CALIFORNIA COASTAL FOOTHILLS...SOME STRONGER
WINDS WILL BE POSSIBLE /15-25 MPH WITH OCCASIONALLY HIGHER GUSTS/
STARTING DAY 3/WEDNESDAY INTO THE WEEKEND. A VERY DRY AIRMASS
COUPLED WITH DOWNSLOPE DRYING DUE TO OFFSHORE WINDS WILL LEAD TO RH
VALUES BELOW 15 PERCENT. ABOVE NORMAL TEMPERATURES BENEATH THE UPPER
RIDGE WILL FURTHER EXACERBATE FIRE WEATHER CONCERNS...AND SOME
SPOTTY AREAS OF ELEVATED FIRE WEATHER CONDITIONS MAY EXIST THROUGH
THE FORECAST PERIOD. WITH THIS FORECAST PERIOD OF EXTENDED DRYING
AND WARM TEMPERATURES...HIGHLIGHT MAY BE NEEDED IN SUBSEQUENT
FORECASTS IF WIND SPEEDS TREND STRONGER.

..LEITMAN.. 09/29/2014

...PLEASE SEE WWW.SPC.NOAA.GOV/FIRE FOR GRAPHIC PRODUCT...



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