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 210837
   
   DAY 1 FIRE WEATHER OUTLOOK  
   NWS STORM PREDICTION CENTER NORMAN OK
   0337 AM CDT FRI AUG 21 2009
   
   VALID 211200Z - 221200Z
   
   ...NO CRITICAL AREAS...
   
   ...SYNOPSIS...
   AN UPPER-LEVEL LOW WILL REMAIN NEARLY STATIONARY OFF THE SRN CA/NRN
   BAJA CA COAST. AN UPPER-LEVEL IMPULSE CURRENTLY OVER THE PACIFIC NW
   WILL MIGRATE NEWD TOWARDS THE CANADIAN ROCKIES...WHILE A SECONDARY
   IMPULSE OFF THE WA/BRITISH COLUMBIA COAST FOLLOWS A SIMILAR TRACK
   THROUGH EARLY SAT. LARGE-SCALE RIDGE AXIS OVER THE INTERMOUNTAIN
   WEST/NRN ROCKIES WILL GRADUALLY SHIFT EWD...BECOMING CENTERED FROM
   THE CNTRL/SRN ROCKIES TO THE NRN HIGH PLAINS BY 22/12Z.
   
   ...COLUMBIA BASIN OF ERN WA...
   ALTHOUGH TEMPERATURES WILL BE SOMEWHAT COOLER COMPARED TO THU IN THE
   WAKE OF A LEAD IMPULSE CROSSING THE AREA ATTM...AFTERNOON READINGS
   IN THE UPPER 80S TO MIDDLE 90S SHOULD BE COMMON RESULTING IN RH
   VALUES AROUND 20 TO 25 PERCENT. SUSTAINED SURFACE WINDS SHOULD
   REMAIN MODERATE /AVERAGING NEAR 15 MPH/. A BRIEF PERIOD OF SLIGHTLY
   STRONGER WINDS SHOULD ACCOMPANY A SECONDARY COLD FRONT PASSAGE IN
   THE EARLY EVENING.
   
   ...PORTIONS OF ERN/SRN CA...
   A FEW HIGH-BASED TSTMS MAY FORM OVER THE SIERRAS TO THE SAN GABRIEL
   MTNS AROUND PEAK HEATING...AS MOISTURE SLOWLY INCREASES AND THE
   INFLUENCE OF UPPER-LEVEL RIDGING GRADUALLY WANES.
   NEVERTHELESS...CONVECTIVE COVERAGE SHOULD BE QUITE SPARSE AND
   POTENTIAL FOR WIDESPREAD DRY TSTMS APPEARS VERY LOW.
   
   ..GRAMS.. 08/21/2009
   
   ...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 210950
   
   DAY 2 FIRE WEATHER OUTLOOK  
   NWS STORM PREDICTION CENTER NORMAN OK
   0450 AM CDT FRI AUG 21 2009
   
   VALID 221200Z - 231200Z
   
   ...NO CRITICAL AREAS...
   
   ...SYNOPSIS...
   UPPER-LEVEL TROUGH OFF THE CANADIAN PACIFIC COAST SHOULD AMPLIFY AND
   STRETCH FROM WRN BRITISH COLUMBIA TO THE PACIFIC NW COAST BY EARLY
   SUN. THIS IN TURN WILL AID IN A GRADUAL NEWD ACCELERATION OF A
   PERSISTENT UPPER-LEVEL LOW OFF THE SRN CA/NRN BAJA CA COAST. AN
   UPPER-LEVEL RIDGE AXIS WILL REMAIN ANCHORED FROM THE CNTRL/SRN
   ROCKIES TO THE NRN HIGH PLAINS. A SIGNIFICANT LOW/MID-LEVEL MOISTURE
   SURGE SHOULD OCCUR FROM THE GULF OF CA/DESERT SW NWD INTO THE
   CNTRL/SRN GREAT BASIN. WHILE THIS WILL LEAD TO INCREASING TSTM
   COVERAGE OVER THE SWRN CONUS...ABRUPT TRANSITION TO WETTING RAINFALL
   SHOULD HELP MINIMIZE POTENTIAL FOR WIDESPREAD DRY TSTMS.
   
   ...ERN UT/WRN CO...
   ON THE NERN PERIPHERY OF THE SWRN CONUS MOISTURE SURGE...HIGH-BASED
   TSTMS SHOULD FORM AROUND PEAK HEATING. WEAKLY FORCED ASCENT AND
   MODEST FLOW THROUGH THE CLOUD BEARING LAYER...OWING TO CLOSE
   PROXIMITY TO LARGE-SCALE RIDGE AXIS...SHOULD LIMIT COVERAGE/DURATION
   OF DRY TSTMS.
   
   ..GRAMS.. 08/21/2009
   
   ...PLEASE SEE WWW.SPC.NOAA.GOV/FIRE FOR GRAPHIC PRODUCT...
   
      

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