Storm Prediction Center
Day 1 and Day 2 Fire Weather Outlooks

Day 1 Fire Weather Forecast graphic

Click for Day 1 FireWX Areal Outline Product

   ZCZC SPCFWDDY1 ALL
   FNUS21 KWNS 130712
   
   DAY 1 FIRE WEATHER OUTLOOK  
   NWS STORM PREDICTION CENTER NORMAN OK
   0212 AM CDT SUN SEP 13 2009
   
   VALID 131200Z - 141200Z
   
   ...NO CRITICAL AREAS...
   
   ...SYNOPSIS...
   AN UPPER TROUGH APPROACHING THE PACIFIC NORTHWEST WILL CONTINUE TO
   PROGRESS SEWD...SHIFTING ONSHORE OF NRN CA/SRN ORE BY THE LATE
   EVENING. MEANWHILE A WEAK UPPER DISTURBANCE THAT INFLUENCED
   THUNDERSTORMS IN CNTRL/NRN CA...MUCH OF ORE...AND NWRN NV YESTERDAY
   WILL CONTINUE TO DRIFT NEWD AHEAD OF THE MAIN LOW. DRY THUNDERSTORMS
   MAY AFFECT A WIDESPREAD AREA OF THE WEST IN RESPONSE TO THESE UPPER
   DISTURBANCES...WHILE A MARGINAL FIRE THREAT DEVELOPS BY AFTERNOON AS
   GUSTY WINDS ALIGN WITH LOW RELATIVE HUMIDITIES IN PORTIONS OF THE
   GREAT BASIN.
   
   MEANWHILE...THE LINGERING UPPER LOW IN MT/WY WILL FINALLY BEGIN TO
   PUSH NWD INTO THE CNTRL CANADIAN PROVINCES. GUSTY WINDS MAY ALIGN
   WITH MARGINAL RELATIVE HUMIDITIES IN WRN WY AS THIS OCCURS...THOUGH
   SUSTAINED SPEEDS ABOVE CRITICAL THRESHOLDS ARE NOT ANTICIPATED.
   
   ...CNTRL AND NRN CA/NRN AND CNTRL NV/MUCH OF ORE/SRN AND CNTRL
   ID/WRN UT...
   00Z SOUNDINGS REFLECT ADEQUATE MID LEVEL MOISTURE TO SUPPORT
   THUNDERSTORM DEVELOPMENT AS WEAK INSTABILITY EXISTS AND A SERIES OF
   UPPER LEVEL DISTURBANCES INFLUENCE DEVELOPMENT...PRIMARILY IN THE
   AFTERNOON/EVENING. THE SUBTLE DISTURBANCE THAT INFLUENCED
   THUNDERSTORMS IN MUCH OF CA/ORE AND NWRN NV YESTERDAY NOW RESIDES
   NEAR THE CNTRL CA/NV BORDERS AS OF 07Z...AND WILL CONTINUE A SLOW
   NEWD MIGRATION AHEAD OF THE NEXT UPPER SYSTEM. THIS WILL LIKELY
   ALLOW ISOLATED THUNDERSTORMS TO DEVELOP ACROSS MUCH OF NV/UT/ID BY
   AFTERNOON...WHERE LOW LEVELS REMAIN DRY AND LAPSE RATES WILL QUICKLY
   STEEPEN. FARTHER W THE MAIN UPPER LOW WILL SLOWLY BEGIN TO SHIFT
   ONSHORE OF NRN CA/SRN ORE. SHORT-LIVED UPPER RIDGING WILL AFFECT
   PORTIONS OF NWRN NV/SWRN ID/ORE/NRN CA BEHIND THE INITIAL UPPER
   DISTURBANCE AND AHEAD OF THE MAIN TROUGH. THIS MAY TEMPORARILY LIMIT
   MORE ORGANIZED/WIDESPREAD DEVELOPMENT. HOWEVER...SUBTLE IMPULSES
   MOVING INTO THE NRN AND CNTRL CA COAST AND HEIGHT FALLS IN
   ASSOCIATION WITH THE UPPER TROUGH WILL INCREASE CONVECTION IN MUCH
   OF CA/NWRN NV AND ORE BY AFTERNOON/EVENING. ALTHOUGH COVERAGE IS
   CURRENTLY ANTICIPATED TO REMAIN ISOLATED...THESE AREAS WILL NEED TO
   BE CLOSELY MONITORED. GIVEN THE ORIENTATION OF THE UPPER
   SYSTEM...MORE WIDESPREAD DEVELOPMENT MAY BE FAVORED IN CNTRL/ERN
   ORE. BY AFTERNOON/EVENING...WLY LOW LEVEL WINDS WILL BEGIN TO PUSH
   MARINE AIR INLAND IN COASTAL CA/ORE...SLOWLY MOISTENING LOW LEVELS
   AND TEMPERING THE FIRE THREAT. MEASURABLE PRECIPITATION WILL BE
   LIKELY AS THE COLD FRONT BEGINS TO PUSH INLAND BY THE EVENING.
   
   ..HURLBUT.. 09/13/2009
   
   ...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 130800
   
   DAY 2 FIRE WEATHER OUTLOOK  
   NWS STORM PREDICTION CENTER NORMAN OK
   0300 AM CDT SUN SEP 13 2009
   
   VALID 141200Z - 151200Z
   
   ...NO CRITICAL AREAS...
   
   ...SYNOPSIS...
   AN UPPER TROUGH WILL MOVE EWD INTO THE GREAT BASIN...WHILE A SECOND
   UPPER LOW NEAR THE SRN ALBERTA/SASKATCHEWAN BORDER CONTINUES TO
   DRIFT NWD. MEANWHILE AT THE SURFACE...A WEAK COLD FRONT WILL SLOWLY
   PROGRESS EWD/SEWD...BECOMING ORIENTED ROUGHLY THROUGH WRN MT SWWD
   INTO ID/NV/CNTRL CA BY AFTERNOON. ALTHOUGH THUNDERSTORMS WILL AFFECT
   A LARGE PORTION OF THE WEST...ESPECIALLY ALONG THE AFOREMENTIONED
   COLD FRONT...MORE SIGNIFICANT MOISTURE WILL HAVE PROGRESSED EWD AS
   WELL AND THUNDERSTORMS WILL PRIMARILY BE WET.
   ADDITIONALLY...RELATIVE HUMIDITIES ARE ANTICIPATED TO REMAIN ABOVE
   CRITICAL THRESHOLDS...WHILE WINDS AT THE SURFACE WILL BE
   SUBCRITICAL.
   
   ..HURLBUT.. 09/13/2009
   
   ...PLEASE SEE WWW.SPC.NOAA.GOV/FIRE FOR GRAPHIC PRODUCT...
   
      

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