Fire Weather Outlook Discussion
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FNUS21 KWNS 251629
FWDDY1

DAY 1 FIRE WEATHER OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1029 AM CST TUE NOV 25 2014

VALID 251700Z - 261200Z

...CRITICAL FIRE WEATHER AREA FOR COASTAL RANGES AND FOOTHILLS OF
SRN CA...

NO CHANGES TO THE PREVIOUS FORECAST.

..PICCA.. 11/25/2014

.PREV DISCUSSION... /ISSUED 0242 AM CST TUE NOV 25 2014/

...SYNOPSIS...
UPPER LEVEL TROUGH INITIALLY OVER THE CNTRL CONUS WILL SHIFT EWD AND
AMPLIFY AS A SHORTWAVE TROUGH MOVES THROUGH ITS BASE -- FROM THE
SRN/CNTRL PLAINS INTO THE LWR/MID MS VALLEY. ANOTHER SHORTWAVE
EMBEDDED WITHIN THE LARGER TROUGH WILL MOVE FROM THE NRN ROCKIES
ACROSS THE NRN PLAINS AND INTO THE MID MO RIVER VALLEY. FARTHER
W...UPPER RIDGE WILL CONTINUE TO BUILD ACROSS CA AND NV. PRIMARY
FEATURES WITHIN THE SURFACE PATTERN WILL BE A LOW MOVING ACROSS THE
NRN PLAINS...A COLD FRONT JUST OFF THE ERN SEABOARD...AND A RIDGE
FROM THE GREAT BASIN SEWD INTO THE FOUR CORNERS. AFTER
00Z/WED...SUBSTANTIAL DEEPENING OF A SURFACE LOW IS EXPECTED AS IT
MOVES NEWD JUST OFF THE CAROLINA COAST.

...COASTAL RANGES AND FOOTHILLS OF SRN CA...
07Z SURFACE OBSERVATIONS REVEAL A LAX-TPH GRADIENT AROUND 6 MB WITH
SUSTAINED WINDS GENERALLY NEAR 15 MPH AND GUSTS AROUND 25 TO 30 MPH
ACROSS SRN CA. OFFSHORE GRADIENT IS EXPECTED TO CONTINUE TO INCREASE
THIS MORNING AS THE GREAT BASIN SURFACE RIDGE BUILDS WITH A
RESULTANT INCREASE IN BOTH SUSTAINED SPEEDS AND GUST
FREQUENCY/STRENGTH. POOR RH RECOVERY IS ONGOING /RH VALUES
PREDOMINATELY BELOW 15 PERCENT AT 07Z/ AND RH VALUES ARE EXPECTED TO
STAY BELOW 15 PERCENT THROUGHOUT THE DAY ACROSS THE COASTAL RANGES
AND ADJACENT FOOTHILLS.

WINDIEST CONDITIONS -- AND THEREFORE THE HIGHEST FIRE WEATHER THREAT
-- ARE EXPECTED OVER SAN DIEGO COUNTY WHERE SUSTAINED WIND SPEEDS
FROM 20 TO 30 MPH WITH GUSTS AROUND 40-50 MPH ARE ANTICIPATED.
SLIGHTLY LOWER SPEEDS ARE EXPECTED FARTHER N. THE COMBINATION OF
WINDY AND DRY CONDITIONS WILL RESULT IN CRITICAL FIRE WEATHER
CONDITIONS...PRIMARILY FROM THE EARLY MORNING THROUGH MID-AFTERNOON.

...SRN HIGH PLAINS...
SWLY SURFACE WINDS NEAR 20 MPH ARE ANTICIPATED OVER THE REGION AS
LEE TROUGHING ACROSS THE HIGH PLAINS TIGHTENS THE SURFACE PRESSURE
GRADIENT. DRY AIRMASS WILL HELP PUSH RH VALUES BELOW 20 PERCENT BUT
GENERALLY COOL TEMPERATURES WILL KEEP ANY FIRE WEATHER THREAT LOW.

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



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