Storm Prediction Center
Day 1 and Day 2 Fire Weather Outlooks

Day 1 Fire Weather Forecast graphic

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   ZCZC SPCFWDDY1 ALL
   FNUS21 KWNS 310717
   
   DAY 1 FIRE WEATHER OUTLOOK  
   NWS STORM PREDICTION CENTER NORMAN OK
   0217 AM CDT FRI JUL 31 2009
   
   VALID 311200Z - 011200Z
   
   ...NO CRITICAL AREAS...
   
   ...SYNOPSIS...
   AN UPPER LEVEL RIDGE WILL BE LOCATED OVER THE WRN CONUS ON
   FRIDAY...WHILE AN UPPER LOW IS POSITIONED OFF THE COAST OF CA.
   MEANWHILE...ANOTHER UPPER TROUGH WILL DROP SWD OUT OF CANADA AND
   ENTER N-CENTRAL PORTIONS OF THE NATION. THIS TROUGH WILL CAUSE A
   FRONTAL BOUNDARY TO APPROACH THE NWRN CONUS FROM THE E.
   OTHERWISE...A PLUME OF VERY WARM TEMPERATURES AND LOW RH VALUES WILL
   BE LOCATED BENEATH THE UPR RIDGE...EXTENDING NWD OUT OF THE DESERT
   SW/GREAT BASIN AND INTO THE PAC NW /E OF THE CASCADE MTNS/. BY
   AFTERNOON...ISOLATED TO SCATTERED STORMS CAN BE EXPECTED OVER THE
   REGION...INCREASING THE RISK FOR FIRE STARTS.
   
   ...NRN CA/NWRN NV/SRN ORE...
   STEEP MID LEVEL LAPSE RATES ARE FORECAST TO RESIDE FROM THE GREAT
   BASIN NWD INTO THE PAC NW. LOBES OF ASCENT EMANATING FROM AN UPPER
   LOW POSITIONED OFF THE W COAST WILL ENCOUNTER THE POTENTIALLY
   UNSTABLE ATMOSPHERE OVER THE REGION...RESULTING IN SCATTERED STORM
   DEVELOPMENT OVER PORTIONS OF NRN CA/NWRN NV/SRN ORE. MODEL GUIDANCE
   INDICATES THAT LARGE SCALE ASCENT WILL BE WEAK BENEATH AN UPPER
   LEVEL RIDGE...WHICH SHOULD PREVENT A WIDESPREAD CONVECTIVE EPISODE
   FROM OCCURRING. IN ADDITION...WEAK MID/UPPER LEVEL FLOW AND
   RESULTANT SLOW STORM MOTION...AS WELL AS PWAT VALUES AOA 0.60 INCHES
   SUGGEST THAT WETTING RAINFALL WILL BE POSSIBLE. HOWEVER...THE
   PRECONVECTIVE SUBCLOUD LAYER WILL BE HOT AND DRY...AND MAY FAVOR
   ISOLATED FIRE STARTS.
   
   ..GARNER.. 07/31/2009
   
   ...PLEASE SEE WWW.SPC.NOAA.GOV/FIRE FOR GRAPHIC PRODUCT...
   
      
Day 2 Fire Weather Forecast graphic

Click for Day 2 FireWX Areal Outline Product

   ZCZC SPCFWDDY2 ALL
   FNUS22 KWNS 310718
   
   DAY 2 FIRE WEATHER OUTLOOK  
   NWS STORM PREDICTION CENTER NORMAN OK
   0218 AM CDT FRI JUL 31 2009
   
   VALID 011200Z - 021200Z
   
   ...NO CRITICAL AREAS...
   
   ...SYNOPSIS...
   VERY LITTLE CHANGE IS ANTICIPATED IN THE UPPER AIR PATTERN OVER THE
   WRN CONUS...WHERE AN UPPER LEVEL RIDGE WILL CONTINUE TO RESIDE E OF
   A CLOSED LOW POSITIONED OFF THE COAST OF CA. HOT TEMPERATURES AND
   LOW RH VALUES WILL BE FAVORED BENEATH THE RIDGE FROM THE GREAT BASIN
   NWD INTO THE PAC NW...IN ADDITION TO AFTERNOON STORMS FROM THE NRN
   SIERRA MTNS N INTO SRN OR.
   
   ...NRN CA/NWRN NV/SRN ORE...
   A DIFFLUENT UPPER LEVEL FLOW REGIME IS FORECAST TO RESIDE OVER NRN
   CA/SRN OR ON SATURDAY...WHICH WILL FOCUS THUNDERSTORM DEVELOPMENT
   ADJACENT TO A HOT/DRY LOW LEVEL AIRMASS RESIDING BENEATH AN UPPER
   RIDGE AXIS. HOWEVER...WITH THE CLOSED UPPER LOW REMAINING STATIONARY
   OFF THE W COAST...FORCING FOR ASCENT WILL LIKELY CONTINUE TO BE
   WEAK...RESULTING IN LOW COVERAGE. STORM MOTION MAY BE FASTER THAN
   FRIDAY...AS UPPER LEVEL FLOW GRADUALLY STRENGTHENS...AND THIS MAY
   CONTRIBUTE TOWARD ISOLATED FIRE STARTS GIVEN THE DRY SUBCLOUD LAYER.
   
   ..GARNER.. 07/31/2009
   
   ...PLEASE SEE WWW.SPC.NOAA.GOV/FIRE FOR GRAPHIC PRODUCT...
   
      

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