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 090738
   
   DAY 1 FIRE WEATHER OUTLOOK  
   NWS STORM PREDICTION CENTER NORMAN OK
   0238 AM CDT WED JUL 09 2008
   
   VALID 091200Z - 101200Z
   
   ...CRITICAL FIRE WEATHER AREA FOR NRN CA/SW ORE...
   
   ...SYNOPSIS...
   THE MID LEVEL RIDGE OVER THE GREAT BASIN AND PAC COAST WILL WEAKEN
   GRADUALLY IN RESPONSE TO THE AMPLIFICATION OF A SHORTWAVE TROUGH
   WHICH WILL MOVE FROM THE GULF OF AK TOWARD MT BY THURSDAY.  THE
   LARGE SCALE FLOW REGIME WILL MAINTAIN A HOT/DRY AIR MASS OVER THE
   GREAT BASIN/CA/ORE...AND AN ACCOMPANYING FIRE WEATHER THREAT ACROSS
   NRN CA/SW ORE.  ISOLATED DRY LIGHTNING MAY OCCUR THIS AFTERNOON
   ACROSS THE LOWER CO VALLEY AND SRN SIERRA NEVADA ON THE NW EDGE OF
   MID LEVEL MOISTURE PLUME.
   
   ELSEWHERE ACROSS THE CONUS...RELATIVELY MOIST CONDITIONS OR WEAK
   WINDS WILL PRECLUDE ANY SUBSTANTIAL FIRE WEATHER THREAT.
   
   ...CRITICAL FIRE WEATHER AREA - NRN CA/SW ORE...
   
   PRIMARY CONDITIONS: HOT TEMPERATURES / LOW RH / MODERATE WINDS
   
   ANOTHER DAY OF MUCH ABOVE NORMAL TEMPERATURES AND LOCALLY GUSTY
   NLY/NELY WINDS IS EXPECTED ACROSS SW ORE AND NRN CA.  RECORD HIGH
   TEMPERATURES TUESDAY AND A DRY ANTECEDENT AIR MASS HAVE RESULTED IN
   POOR OVERNIGHT RH RECOVERY ACROSS THE HIGHER ELEVATIONS...AS WELL AS
   THE SACRAMENTO VALLEY.  RH WILL FALL QUICKLY BY AFTERNOON TO NEAR 10
   PERCENT AS SURFACE TEMPERATURES AGAIN APPROACH RECORD VALUES IN THE
   90S TO 110S.  THOUGH LARGE SCALE WINDS WILL BE SOMEWHAT MARGINAL FOR
   A CRITICAL FIRE WEATHER THREAT...LOCALLY GUSTY/DOWNSLOPE NLY/NELY
   WINDS OF 15-25 MPH WILL COMBINE WITH THE HOT TEMPERATURES AND LOW RH
   TO SUPPORT CRITICAL FIRE WEATHER CONDITIONS THROUGH THIS AFTERNOON. 
   A TENDENCY FOR WEAK ONSHORE FLOW WILL GRADUALLY REDUCE THE FIRE
   WEATHER THREAT BY TONIGHT...ESPECIALLY IN SW ORE.
   
   ...LOWER CO RIVER VALLEY AND SRN/CENTRAL SIERRA NEVADA RANGE...
   ISOLATED HIGH-BASED THUNDERSTORMS WERE OBSERVED TUESDAY EVENING FROM
   THE LOWER CO VALLEY NWWD TO THE CENTRAL SIERRA NEVADA.  A MID LEVEL
   MOISTURE PLUME...PER WATER VAPOR IMAGERY AND THE 00Z DRA
   SOUNDING...AND STRONG DAYTIME HEATING COULD AGAIN SUPPORT A FEW
   HIGH-BASED THUNDERSTORMS WITH DRY LIGHTNING.  THE OVERALL COVERAGE
   OF DRY LIGHTNING WILL BE RATHER SPARSE...THUS A CRITICAL AREA DOES
   NOT APPEAR WARRANTED.
   
   ..THOMPSON.. 07/09/2008
   
   ...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 090740
   
   DAY 2 FIRE WEATHER OUTLOOK  
   NWS STORM PREDICTION CENTER NORMAN OK
   0240 AM CDT WED JUL 09 2008
   
   VALID 101200Z - 111200Z
   
   ...CRITICAL FIRE WEATHER AREA FOR NRN ROCKIES INTO CENTRAL MT...
   
   ...SYNOPSIS...
   A STRONG SHORTWAVE TROUGH AND ASSOCIATED SURFACE COLD FRONT WILL
   SWEEP EWD ACROSS THE NRN ROCKIES AND MT WEDNESDAY AFTERNOON/NIGHT. 
   STRONG DOWNSLOPE LOW-LEVEL WINDS AND LOW AFTERNOON RH WILL SUPPORT
   CRITICAL FIRE WEATHER CONDITIONS ACROSS PORTIONS OF NRN ID AND
   WRN/CENTRAL MT.  HOT AND DRY CONDITIONS WILL PERSIST ACROSS THE
   GREAT BASIN INTO CA...THOUGH LARGE SCALE WINDS WILL BE RELATIVELY
   WEAK.  THERE WILL BE SOME POTENTIAL FOR ISOLATED DRY THUNDERSTORMS
   ALONG THE NRN AND WRN PERIPHERY OF THE MONSOONAL MOISTURE PLUME
   ACROSS PORTIONS OF SRN GREAT BASIN...THOUGH CONFIDENCE IN DRY
   THUNDERSTORM COVERAGE IS RATHER LOW AT THIS TIME.
   
   OTHERWISE...RELATIVELY MOIST CONDITIONS E OF THE ROCKIES WILL
   PRECLUDE ANY FIRE WEATHER CONCERNS.
   
   ...CRITICAL FIRE WEATHER AREA - NRN ROCKIES TO CENTRAL MT...
   
   PRIMARY CONDITIONS: STRONG WINDS / LOW RH
   
   WLY DOWNSLOPE WINDS OF 20-30 MPH WITH GUSTS IN EXCESS OF 40 MPH ARE
   EXPECTED THURSDAY AFTERNOON/EVENING FROM THE HIGH TERRAIN ALONG THE
   ID/MT BORDER EWD INTO CENTRAL MT...IN ASSOCIATION WITH THE
   AMPLIFYING MID LEVEL TROUGH.  AFTERNOON TEMPERATURES IN THE 70S
   ACROSS WRN MT AND 85-95 INTO CENTRAL MT WILL SUPPORT RH VALUES OF
   15-20 PERCENT IN COMBINATION WITH THE STRONG WINDS.  THOUGH FIRE
   DANGER RATINGS ARE NOT PARTICULARLY HIGH AND PRECIPITATION HAS
   FALLEN OVER MUCH OF MT IN THE PAST WEEK...THE WINDS/RH STILL APPEAR
   SUPPORTIVE OF AN ELEVATED FIRE RISK FROM LATE AFTERNOON INTO THE
   EVENING.  FIRE WEATHER CONDITIONS WILL IMPROVE SLOWLY OVERNIGHT WITH
   COLD FRONTAL PASSAGE AND RH RECOVERY ACROSS WRN/CENTRAL MT.
   
   ..THOMPSON.. 07/09/2008
   
   ...PLEASE SEE WWW.SPC.NOAA.GOV/FIRE FOR GRAPHIC PRODUCT...
   
      

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