Storm Prediction Center Day 1 Fire Weather Outlook

Created: Mon Nov 24 16:31:02 UTC 2014 (20141124 1700Z Day 1 FireWX shapefile | 20141124 1700Z Day 1 FireWX KML)

Day 1 Fire Weather Forecast graphic
Risk Area (sq. mi.) Area Pop. Some Larger Population Centers in Risk Area
Critical 10,773 9,238,225 Riverside, CA...Chula Vista, CA...Glendale, CA...San Bernardino, CA...Irvine, CA...

Click for Day 1 FireWX Areal Outline Product

   ZCZC SPCFWDDY1 ALL
   FNUS21 KWNS 241630

   DAY 1 FIRE WEATHER OUTLOOK  
   NWS STORM PREDICTION CENTER NORMAN OK
   1030 AM CST MON NOV 24 2014

   VALID 241700Z - 251200Z

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

   NO CHANGES TO THE PREVIOUS FORECAST. LOCALLY ELEVATED FIRE WEATHER
   CONDITIONS ARE POSSIBLE TODAY ACROSS PORTIONS OF NWRN OK / SRN
   KS...AS A VERY DRY POST-FRONTAL AIR MASS AND DEEP DIURNAL MIXING
   RESULT IN BREEZY CONDITIONS AND RH VALUES FALLING INTO THE 15-25
   PERCENT RANGE. WHILE THIS AREA HAS BEEN REMOVED TO THE NORTH OF
   WETTING RAINS OVER THE LAST 1-2 WEEKS...SEASONABLY COOL TEMPERATURES
   AND MARGINAL WIND SPEEDS PRECLUDE THE NEED FOR AN ELEVATED
   DELINEATION.

   ..PICCA.. 11/24/2014

   .PREV DISCUSSION... /ISSUED 0250 AM CST MON NOV 24 2014/

   ...SYNOPSIS...
   UPPER TROUGH COVERING THE CONUS WILL SHIFT EWD AND AMPLIFY WHILE
   UPPER RIDGING SPREADS INTO SRN/CNTRL CA. AT THE SURFACE...DEEP LOW
   WILL MOVE FROM THE GREAT LAKES NEWD THROUGH NERN ONTARIO AND INTO
   WRN QUEBEC AS A TRAILING COLD FRONT PUSHES ACROSS THE ERN CONUS.
   HIGH PRESSURE WILL SHIFT SEWD FROM THE GREAT BASIN TOWARDS THE FOUR
   CORNERS.

   ...COASTAL RANGES AND FOOTHILLS OF SRN CA...
   REGIONAL OBSERVATIONS REVEAL THAT GENERALLY POOR RH RECOVERY IS
   ONGOING WITH NUMEROUS SITES REPORTING RH VALUES BELOW 15 PERCENT.
   OFFSHORE GRADIENT IS EXPECTED TO BE LOWER THROUGHOUT THE DAY THAN
   YESTERDAY WITH SUSTAINED NLY/NELY WINDS AROUND 20 MPH WITH GUSTS UP
   TO 40 MPH THROUGH THE FAVORED CANYONS AND PASSES.  RH VALUES WILL
   REMAIN BELOW 15 PERCENT AND ELEVATED TO LOCALLY CRITICAL FIRE
   WEATHER CONDITIONS ARE ANTICIPATED DURING THE DAY. 

   AFTER 00Z/TUE... OFFSHORE GRADIENT IS EXPECTED TO INCREASE AS COLD
   AIR MOVES INTO THE ERN GREAT BASIN AND FOUR CORNERS...STRENGTHENING
   SURFACE HIGH PRESSURE THROUGHOUT THE REGION. SUSTAINED WIND SPEEDS
   AFTER 00Z/TUE COULD APPROACH 30 MPH WITH GUSTS OVER 50 MPH. THESE
   STRONG WINDS COUPLED WITH POOR OVERNIGHT RH RECOVERY AND DRY FUELS
   WILL RESULT IN CRITICAL FIRE WEATHER CONDITIONS AFTER 00Z/TUE.

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

      

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