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 010755
   
   DAY 1 FIRE WEATHER OUTLOOK  
   NWS STORM PREDICTION CENTER NORMAN OK
   0255 AM CDT TUE SEP 01 2009
   
   VALID 011200Z - 021200Z
   
   ...NO CRITICAL AREAS...
   
   ...SYNOPSIS...
   RESILIENT SWRN U.S. ANTICYCLONE WILL AGAIN FAVOR WARM/HOT TEMPS OVER
   PARTS OF THE WRN CONUS AS SURFACE HIGH PRESSURE AND LARGE SCALE
   TROUGHING AFFECT THE MIDWEST AND ERN SEABOARD.  TROPICAL CYCLONE
   IGNACIO REMNANTS INITIALLY OVER ORE THIS MORNING WILL MOVE INTO
   BRITISH COLUMBIA WITH ANOTHER IMPULSE FOLLOWING CLOSELY BEHIND IN
   ITS WAKE ON ERN SIDE OF ERN PACIFIC CYCLONIC VORTEX.  SHORTWAVE
   RIDGING WILL OCCUR OVER THE NRN GREAT BASIN LEADING TO WARMER TEMPS.
   FURTHER E...A CLOSED LOW/SHORTWAVE TROUGH OVER MT WILL SHIFT EWD
   INTO THE DAKOTAS.  VERY WARM TEMPS ARE AGAIN EXPECTED OVER PARTS OF
   SRN CA ALTHOUGH SOME SLIGHT IMPROVEMENT IN MIN RH IS ANTICIPATED.
   
   ...NWRN GREAT BASIN...
   WEAKENING LOW-MID LEVEL FLOW/RISING HEIGHTS WILL OCCUR AS UPPER
   IMPULSE TO THE NW MOVES AWAY FROM THE REGION.  SHORT DURATION
   SUSTAINED WINDS AROUND 20 MPH WINDS ARE EXPECTED WITH HIGHER GUSTS
   AS THE BOUNDARY LAYER WARMS RESULTING IN DEEPER MIXING.  TEMPS ARE
   EXPECTED TO BE WARMER WITH RH IN THE 15-20 PERCENT DURING PEAK
   HEATING FAVORING LOCALIZED CRITICAL CONDITIONS.
   
   ...SRN WY...
   AS MODEST BELT OF LOW TO MID-LEVEL WLYS GLANCES THE REGION IN
   ASSOCIATION WITH ERN MT SHORTWAVE TROUGH...MODERATELY STRONG
   SUSTAINED SURFACE WINDS /NEARING 20 MPH WITH HIGHER GUSTS/ WITHIN
   ELEVATED MIXED LAYER PLUME WILL DEVELOP W OF MOIST AXIS.  SEASONABLY
   WARM TEMPS AND A NEARLY DRY ADIABATIC 0-3 KM AGL LAPSE RATES MAY
   RESULT IN MIN RH AROUND 15 PERCENT AND SUPPORT AN ELEVATED FIRE
   WEATHER THREAT.
   
   ..SMITH.. 09/01/2009
   
   ...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 010859
   
   DAY 2 FIRE WEATHER OUTLOOK  
   NWS STORM PREDICTION CENTER NORMAN OK
   0359 AM CDT TUE SEP 01 2009
   
   VALID 021200Z - 031200Z
   
   ...NO CRITICAL AREAS...
   
   ...SYNOPSIS...
   STRONG SHORTWAVE TROUGH WILL MOVE ONSHORE THE PACIFIC NW WEDNESDAY
   NIGHT AS AN ANTICYCLONE REMAINS OVER THE DESERT SW.  STRENGTHENING
   KINEMATIC FIELDS IN ASSOCIATION WITH APPROACHING PACIFIC NW
   SHORTWAVE TROUGH WILL OVERSPREAD PARTS OF NRN CA NEWD INTO THE NRN
   ROCKIES.  AN ANTECEDENTLY DRY AIRMASS OVER THE NWRN GREAT BASIN WILL
   COMBINE WITH STRONG WINDS LEADING TO AN ENHANCED FIRE WEATHER THREAT
   OVER PORTIONS OF CA/NV/ORE.
   
   ...NERN CA / S-CNTRL ORE / EXTREME NWRN NV...
   AS THE SYSTEM APPROACHES FROM THE W...SSWLY WINDS WILL STRENGTHEN
   DURING THE DAY.  SOME MODEL GUIDANCE INDICATE SUSTAINED WINDS MAY BE
   AS STRONG AS 20-30 MPH WITH GUSTS UP TO 40 MPH.  DESPITE SUFFICIENT
   BOUNDARY LAYER MIXING OWING TO A STEEP LAPSE RATE
   ENVIRONMENT...MODEL FORECAST SOUNDINGS ONLY SHOW MARGINAL MIN RH
   GENERALLY IN THE MID-UPPER TEENS TO LOWER 20S PERCENT RANGE BEFORE
   DIURNAL COOLING OCCURS AND A PACIFIC COLD FRONT PUSHES EWD OVER THE
   AREA IN THE EVENING HOURS.  IF EITHER FORECAST MIN RH IS SLIGHTLY
   LOWER OR STRENGTH/DURATION IS A STRONG AS THE RECENT MODEL RUNS FROM
   THE NAM AND ETAKF...THEN AN UPGRADE TO CRITICAL MAY BE WARRANTED.
   
   ..SMITH.. 09/01/2009
   
   ...PLEASE SEE WWW.SPC.NOAA.GOV/FIRE FOR GRAPHIC PRODUCT...
   
      

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