Fire Weather Outlook Discussion
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000
FNUS21 KWNS 050720
FWDDY1

DAY 1 FIRE WEATHER OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0219 AM CDT SUN JUL 05 2015

VALID 051200Z - 061200Z

...SYNOPSIS...
THE MAIN FOCUS FOR FIRE WEATHER CONCERNS WILL BE ACROSS PARTS OF THE
PACIFIC NORTHWEST TODAY. AN UPPER TROUGH WILL PIVOT EAST OF THE
NORTHERN ROCKIES AND CONTINUE TRACKING EASTWARD TODAY...WHILE AN
UPPER LOW SITS OFF THE COAST OF CA. THIS WILL LEAVE A WEAKNESS IN
THE HEIGHT FIELD OVER THE PACIFIC NW AND THE SOUTHWESTERN RIDGE WILL
SLOWLY BUILD NORTHWARD THROUGH THE PERIOD. ABUNDANT MIDLEVEL
MOISTURE ACROSS SOUTHERN ORE INTO NORTHERN CA WILL LEAD TO ANOTHER
ROUND OF THUNDERSTORMS AND A THREAT FOR NEW LIGHTNING STARTS.
FURTHER NORTH OVER THE COLUMBIA BASIN...N/NELY LOW TO MIDLEVEL FLOW
AND A DRY BOUNDARY LAYER WILL LEAD TO ANOTHER DAY OF ELEVATED FIRE
WEATHER CONCERNS.

...PACIFIC NORTHWEST...

DRY CONDITIONS WILL PREVAIL ACROSS THE COLUMBIA BASIN TODAY WITH
MINIMUM AFTERNOON RH VALUES FALLING INTO THE TEENS AS TEMPERATURES
WARM INTO THE UPPER 80S TO NEAR 100 DEGREES. THE LACK OF A STRONGER
PRESSURE GRADIENT WILL KEEP NORTHEAST WINDS SPEEDS BELOW THE
CRITICAL THRESHOLD...AT 10-15 MPH WITH OCCASIONAL GUSTS TO 20 MPH.
GIVEN THE ONGOING DROUGHT...LACK OF RECENT RAINFALL AND ABUNDANT DRY
FUELS...ELEVATED FIRE WEATHER CONDITIONS ARE EXPECTED.

FURTHER SOUTH ACROSS PARTS OF SOUTHERN ORE INTO NORTHERN
CA...ISOLATED TO SCATTERED THUNDERSTORMS ARE EXPECTED. PW VALUES
GENERALLY RANGE FROM .75-1.00 INCH...WITH THE LOWER VALUES FURTHER
WEST. WHILE WETTING RAINS WILL OCCUR IN THE MAIN CORE OF
THUNDERSTORMS...LIGHTNING STRIKES OUTSIDE THIS AREA WILL POSE A
THREAT FOR NEW FIRE STARTS GIVEN FAVORABLE FUEL CONDITIONS AND
LITTLE TO NO WETTING RAIN AWAY FROM THE MAIN CORES. GUSTY AND
ERRATIC OUTFLOW WINDS ALSO WILL BE A CONCERN FOR ANY ONGOING FIRES
ACROSS THE REGION.

..LEITMAN.. 07/05/2015

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




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