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 200920
   
   DAY 1 FIRE WEATHER OUTLOOK  
   NWS STORM PREDICTION CENTER NORMAN OK
   0420 AM CDT SAT OCT 20 2007
   
   VALID 201200Z - 211200Z
   
   ...CRITICAL FIRE WEATHER AREA FOR A PORTION OF THE
   SOUTHWEST...CENTRAL/SRN HIGH PLAINS...
   ...CRITICAL FIRE WEATHER AREA FOR THE LOWER CO RIVER
   VALLEY...MTNS/VALLEYS OF SRN CA...
   
   ...SYNOPSIS...
   A STRONG UPPER STORM SYSTEM WILL DIG SEWD FROM THE PAC NW INTO THE
   ROCKIES THROUGH THE PERIOD. AHEAD OF THIS SYSTEM...STRENGTHENING
   WIND FIELDS WILL COMBINE WITH LOW RH READINGS TO SUPPORT THE
   DEVELOPMENT OF A CRITICAL FIRE WEATHER THREAT OVER PORTIONS OF THE
   SOUTHWEST AND CENTRAL/SRN HIGH PLAINS. IN THE WAKE OF THIS UPPER
   TROUGH...OFFSHORE/NLY WINDS WILL STRENGTHEN OVER THE LOWER CO RIVER
   VALLEY AND SRN CA SUPPORTING AN ADDITIONAL CRITICAL FIRE WEATHER
   THREAT AREA. ELSEWHERE ACROSS THE NATION...A LARGE AREA OF SFC HIGH
   PRESSURE WILL MOVE THROUGH THE SERN/MID ATLANTIC STATES. ALONG WITH
   BUILDING UPPER RIDGE....WARM/DRY CONDITIONS WILL BE FOUND IN THIS
   REGION. BUT LIGHT WINDS WILL PRECLUDE ANY CRITICAL FIRE WEATHER
   THREAT.
   
   ...CRITICAL FIRE WEATHER AREA - NRN AZ...NRN/ERN NM...ERN CO/WRN KS
   AND WRN TX/WRN OK...
   
   PRIMARY CONDITIONS: SUSTAINED SWLY WINDS FROM 20-30 MPH WITH GUSTS
   OVER 40 MPH...LONG TERM DROUGHT...MIN RH READINGS FROM 5-20 PERCENT
   
   AHEAD OF A STRONG UPPER STORM SYSTEM...INCREASING LOW-MID LEVEL WIND
   FIELDS WILL MIX TOWARDS THE SFC SUPPORTING STRENGTHENING WINDS.
   SUSTAINED WINDS FROM 20-30 MPH ARE EXPECTED TO DEVELOP OVER THE AREA
   BY EARLY AFTERNOON WITH GUSTS OVER 40 MPH DURING THE MID-LATE
   AFTERNOON. SEASONABLY LOW DEWPTS IN THE 10S/20S OVER AZ/NM AND THE
   20S/30S IN THE HIGH PLAINS WILL COMBINE WITH ABOVE NORMAL
   TEMPERATURES IN THE 70S/80S TO PRODUCE MIN RH READINGS FROM 5-20
   PERCENT. THE COMBINATION OF THE WINDS AND LOW RH READINGS WILL
   SUPPORT A FAIRLY LARGE CRITICAL FIRE WEATHER THREAT AREA. WINDS WILL
   DIMINISH SLOWLY THIS EVENING /ESPCLY OVER HIGHER ELEVATIONS/ AS MID
   LEVEL WIND FIELDS CONTINUE TO STRENGTHEN. EWD BOUNDARY OF THE
   CRITICAL AREA IS DRAWN TO MATCH THE EXTENT OF CURED/DRIED VEGETATION
   AND RECENT RAINFALL.
   
   ...CRITICAL FIRE WEATHER AREA - LOWER CO RIVER VALLEY/MTNS AND
   VALLEYS OF SRN CA...
   
   PRIMARY CONDITIONS: SUSTAINED N-NELY WINDS FROM 20-30 MPH WITH GUSTS
   OVER 40 MPH OVERNIGHT...MIN RH READINGS FROM 5-15 PERCENT...LONG
   TERM DROUGHT
   
   IN THE WAKE OF AN UPPER TROUGH...A BROAD AREA OF HIGH PRESSURE WILL
   BUILD INTO THE GREAT BASIN LATE IN THE PERIOD. A STRONG N-NELY
   PRESSURE/THERMAL GRADIENT WILL SUPPORT THE DEVELOPMENT OF SUSTAINED
   WINDS FROM 20-30 MPH DURING THE EVENING HOURS...WITH GUSTS UP TO 50
   MPH POSSIBLE TOWARDS 12Z ACROSS THE MTNS/PASSES OF SRN CA. VERY DRY
   AIR WITH RH READINGS FROM 5-10 PERCENT WILL COMBINE WITH THE WINDS
   TO SUPPORT A CRITICAL FIRE WEATHER THREAT.
   
   ...SOUTHEAST/OHIO VALLEY AND MID ATLANTIC...
   ASSOCIATED WITH A BROAD AREA OF HIGH PRESSURE ENCOMPASSING THE
   REGION...DRY AIR WILL COMBINE WITH MILD TEMPERATURES TO PRODUCE
   WIDESPREAD MIN RH READINGS FROM 20-30 PERCENT DURING THE AFTERNOON.
   GENERALLY LIGHT WINDS FROM 5-10 MPH WILL PRECLUDE A CRITICAL FIRE
   WEATHER THREAT.
   
   ..CROSBIE.. 10/20/2007
   
   ...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 200921
   
   DAY 2 FIRE WEATHER OUTLOOK  
   NWS STORM PREDICTION CENTER NORMAN OK
   0421 AM CDT SAT OCT 20 2007
   
   VALID 211200Z - 221200Z
   
   ...EXTREMELY CRITICAL FIRE WEATHER AREA FOR THE MTNS/VALLEYS OF SRN
   CA...
   ...CRITICAL FIRE WEATHER AREA FOR THE LOWER CO RIVER VALLEY/WRN
   AZ...
   ...CRITICAL FIRE WEATHER AREA FOR SERN NM...SWRN TX...
   ...CRITICAL FIRE WEATHER AREA FOR COASTAL MTNS/VALLEYS OF CENTRAL
   CA...
   
   ...SYNOPSIS...
   A STRONG UPPER TROUGH WILL PROGRESS FROM THE ROCKIES INTO THE PLAINS
   DURING THE PERIOD. ON THE SRN PERIPHERY OF THIS UPPER TROUGH...DRY
   AIR/MODERATE WINDS WILL PRODUCE ANOTHER DAY OF CRITICAL FIRE WEATHER
   CONDITIONS OVER PORTIONS OF THE SRN HIGH PLAINS. FURTHER WEST...AN
   UPPER RIDGE WILL BUILD ALONG THE WEST COAST SUPPORTING A
   WARMING/DRYING TREND. ANOTHER DAY OF CRITICAL FIRE WEATHER
   CONDITIONS WILL OCCUR OVER THE LOWER CO RIVER VALLEY...WITH
   STRENGTHENING SFC WINDS SUPPORTING AN EXTREMELY CRITICAL FIRE
   WEATHER THREAT FOR PORTIONS OF SRN CA. MEANWHILE...AN AREA OF SFC
   HIGH PRESSURE OFF THE MID-ATLANTIC WILL PRODUCE ANOTHER DAY OF LOW
   RH READINGS OVER THE MID-ATLANTIC AND THE SERN STATES. AN INCREASING
   SFC PRESSURE GRADIENT OVER THE OHIO VALLEY/SRN GREAT LAKES REGION
   WILL LEAD TO HIGH FIRE DANGER.
   
   ...EXTREMELY CRITICAL FIRE WEATHER AREA - MTNS/VALLEYS OF SRN CA...
   
   PRIMARY CONDITIONS: SUSTAINED NELY WINDS FROM 30-50 MPH WITH GUSTS
   OVER 75 MPH...MIN RH READINGS FROM 5-10 PERCENT...LONG TERM DROUGHT
   
   A VERY STRONG SANTA ANA/OFFSHORE WIND EVENT IS EXPECTED TO DEVELOP
   BEGINNING LATE ON DAY ONE AND LASTING PAST DAY 2. HOWEVER ON DAY
   2...THE COMBINATION OF STRONG PRESSURE GRADIENTS /-15 MB BETWEEN TPH
   AND LAX/ AND MODERATE UNIDIRECTIONAL WIND FIELDS IN THE LOWEST 20
   KFT WILL SUPPORT VERY STRONG SFC WINDS /SUSTAINED UP TO 50 MPH/
   DEVELOPING OVER THE HIGHER ELEVATIONS EARLY IN THE PERIOD AND INTO
   THE VALLEYS DURING THE MORNING HOURS. A DRY LOW LEVEL AIRMASS OVER
   THE GREAT BASIN COMBINED WITH COMPRESSIONAL WARMING WILL SUPPORT MIN
   RH READINGS FROM 5-10 PERCENT AS TEMPERATURES WARM INTO THE 70S/80S
   DURING THE DAY. THE STRONG WINDS WILL ALSO SUPPORT VERY POOR TO NO
   RH RECOVERY OVERNIGHT. WINDS SHOULD RE-STRENGTHEN OVERNIGHT AS THE
   PRESSURE/THERMAL GRADIENTS INCREASE...WITH THE STRONGEST WINDS
   EXPECTED OVER HIGHER ELEVATIONS AND THROUGH PASSES/BELOW CANYONS.
   
   ...CRITICAL FIRE WEATHER AREA - CENTRAL CA COASTAL MTNS/VALLEYS...
   
   PRIMARY CONDITIONS: SUSTAINED ENELY WINDS FROM 20-30 MPH WITH GUSTS
   UP TO 50 MPH...MIN RH READINGS FROM 10-15 PERCENT...LONG TERM
   DROUGHT
   
   NORTH OF THE EXTREMELY CRITICAL FIRE WEATHER THREAT AREA...SLIGHTLY
   WEAKER PRESSURE GRADIENT WILL SUPPORT SOMEWHAT WEAKER ENELY WINDS
   FROM 20-30 MPH WITH GUSTS UP TO 50 MPH. HOWEVER...THESE WINDS
   COMBINED WITH THE LOW DEWPTS/RH READINGS WILL BE SUFFICIENT TO
   SUPPORT A CRITICAL FIRE WEATHER THREAT. THE STRONGEST WINDS ARE
   EXPECTED SUNDAY NIGHT WHEN THE OFFSHORE GRADIENTS IS GREATEST.
   
   ...CRITICAL FIRE WEATHER AREA - SOUTHEAST NM/SOUTHWEST TX...
   
   PRIMARY CONDITIONS: SUSTAINED WNWLY WINDS FROM 20-30 MPH WITH GUSTS
   OVER 40 MPH...MIN RH READINGS FROM 10-15 PERCENT
   
   JUST AHEAD OF THE UPPER LEVEL TROUGH AXIS...STRONG LOW-MID LEVEL
   WINDS FIELDS WILL MIX TOWARDS THE SFC TO SUPPORT MODERATE WLY WINDS.
   ALTHOUGH SUSTAINED WINDS FROM 20-30 MPH WILL BE COMMONPLACE OVER THE
   AREA....THE STRONGEST WINDS WILL OCCUR BEHIND A COLD FRONT.
   HOWEVER...COOLER TEMPERATURES WILL LIMIT THE NWD EXTENT OF THE
   CRITICAL FIRE WEATHER THREAT ACROSS ERN NM/WRN TX. LOW DEWPTS IN THE
   10S/20S COMBINED WITH NEAR TO SLIGHTLY ABOVE NORMAL TEMPERATURES
   WILL PRODUCE A CRITICAL FIRE WEATHER THREAT. DESPITE A CONTINUATION
   OF MODERATE TO STRONG NLY WINDS OVERNIGHT...COOLER TEMPERATURES WILL
   END THE CRITICAL FIRE THREAT BY 03Z.
   
   ...CRITICAL FIRE WEATHER AREA - LOWER CO RIVER VALLEY/SWRN AZ...
   
   PRIMARY CONDITIONS: SUSTAINED NLY WINDS FROM 20-30 MPH WITH GUSTS
   OVER 40 MPH...MIN RH READINGS FROM 5-10 PERCENT...LONG TERM DROUGHT
   
   IN THE WAKE OF THE UPPER TROUGH...A STRONG N-S PRESSURE GRADIENT
   BETWEEN HIGH PRESSURE OVER THE SRN GREAT BASIN AND LOWER PRESSURE
   OVER THE GULF OF CA WILL SUPPORT STRONG NLY WINDS FROM 20-30 MPH
   WITH GUSTS OVER 40 MPH FOR MOST OF THE DAYTIME HOURS. ALTHOUGH
   TEMPERATURES WILL BE NEAR NORMAL /LOWER-MID 80S F/ VERY LOW DEWPTS
   FROM 0-10 F WILL SUPPORT MIN RH READINGS FROM 5-10 PERCENT. WINDS
   SHOULD DIMINISH TO BELOW CRITICAL LEVELS OVER MOST OF THE AREA
   OVERNIGHT AS THE ATMOSPHERE DECOUPLES...BUT GUSTY NELY WINDS MAY
   DEVELOP OVER THE HIGHER ELEVATIONS OF SCENTRAL AZ IN RESPONSE TO
   BUILDING SFC HIGH PRESSURE OVER ERN AZ.
   
   ...OHIO VALLEY/SRN GREAT LAKES...
   AHEAD OF PLAINS UPPER TROUGH...AN AREA OF LOW PRESSURE WILL DEEPEN
   OVER THE NRN GREAT LAKES. STRENGTHENING PRESSURE GRADIENT BETWEEN
   THIS AREA OF LOW PRESSURE AND HIGH PRESSURE OFF THE MID-ATLANTIC
   WILL SUPPORT SUSTAINED SLY WINDS FROM 15-20 MPH FROM THE OHIO VALLEY
   INTO THE SRN GREAT LAKES. WELL ABOVE NORMAL TEMPERATURES IN THE
   70S/LOWER 80S COMBINED WITH LITTLE MOISTURE RETURN WILL PRODUCE MIN
   RH READINGS FROM 25-35 PERCENT.
   
   ..CROSBIE.. 10/20/2007
   
   ...PLEASE SEE WWW.SPC.NOAA.GOV/FIRE FOR GRAPHIC PRODUCT...
   
      

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