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 280936
   
   DAY 1 FIRE WEATHER OUTLOOK  
   NWS STORM PREDICTION CENTER NORMAN OK
   0336 AM CST WED NOV 28 2007
   
   VALID 281200Z - 291200Z
   
   ...CRITICAL FIRE WEATHER AREA FOR COASTAL AREAS OF SW CA...
   
   ...SYNOPSIS...
   A STRONG UPPER-LEVEL TROUGH CENTERED IN THE CENTRAL ROCKIES WILL
   MOVE INTO THE NEW ENGLAND STATES THROUGH THE FORECAST PERIOD...AND
   AN ASSOCIATED COLD FRONT WILL PUSH THROUGH THE MIDWEST AND INTO THE
   EASTERN UNITED STATES.  BEHIND THE COLD FRONT...A HIGH PRESSURE
   SYSTEM WILL BUILD INTO THE GREAT BASIN...STRENGTHENING THE PRESSURE
   GRADIENT ACROSS SOUTHERN CA...BRINGING STRONG AND GUSTY WINDS AND A
   CRITICAL FIRE WEATHER RISK TO THE AREA...WITH NEAR CRITICAL
   CONDITIONS POSSIBLE IN WESTERN CA.  AND...AS IN PREVIOUS DAYS...THE
   SOUTHEAST STATES WILL SEE SOME LOW RELATIVE HUMIDITY VALUES IN THE
   LATE AFTERNOON.
   
   ...CRITICAL FIRE WEATHER AREA - COASTAL AREAS OF SW CA...
   
   PRIMARY CONDITIONS: STRONG AND GUSTY WINDS...LOW RELATIVE
   HUMIDITY...CONTINUED DROUGHT
   
   AS A COLD FRONT SWEEPS THROUGH THE MIDWEST...A HIGH PRESSURE SYSTEM
   WILL BUILD BEHIND IT INTO THE GREAT BASIN AREA.  BY WEDNESDAY
   MORNING...A SIGNIFICANT PRESSURE GRADIENT WILL EXIST BETWEEN THE
   HIGH PRESSURE AND SOUTHERN CALIFORNIA...AND STRONG AND GUSTY
   OFF-SHORE SANTA ANA WINDS WILL DEVELOP DURING THE DAY.  SUSTAINED
   NORTHEASTERLY WINDS AROUND 15 TO 25 MPH WITH GUSTS TO 4O TO 50 MPH
   ARE POSSIBLE...ESPECIALLY IN MOUNTAIN PASSES AND CANYONS.
   ADDITIONALLY...A SIGNIFICANTLY DRY AIR MASS REMAINS IN PLACE IN THE
   REGION...AND RELATIVE HUMIDITY VALUES ARE EXPECTED TO BE MAINLY
   BETWEEN 10 TO 15 PERCENT...BUT SOME AREAS WILL EXPERIENCE SINGLE
   DIGIT READINGS. THE TIME OF HIGHEST SUSTAINED WIND SPEEDS WILL BE
   DURING THE DAY...AND WILL DIMINISH BY THIS EVENING AS THE PRESSURE
   GRADIENT RELAXES.  A CRITICAL FIRE WEATHER RISK IS FORECAST FOR THE
   REGION DUE TO THE SANTA ANA WIND CONDITIONS...LOW RELATIVE HUMIDITY
   VALUES...AND THE CONTINUED LONG-TERM DROUGHT AND DRY FUELS IN THE
   REGION.
   
   ...WESTERN CA...
   SOME MODERATELY STRONG AND GUSTY WINDS ARE POSSIBLE IN THIS AREA AS
   WELL ON WEDNESDAY...BUT THE WIND SPEEDS HERE WILL BE AROUND 15 TO 25
   MPH WITH GUSTS NEAR 35 MPH. RELATIVE HUMIDITY VALUES WILL FALL INTO
   THE 20 PERCENT RANGE DURING THE AFTERNOON...BUT LACK OF SIGNIFICANT
   WIND SPEEDS AND LOW RH VALUES WILL KEEP THE REGION OUT OF A CRITICAL
   RISK.
   
   ...SERN STATES...
   RELATIVE HUMIDITY VALUES WILL DROP BELOW 35 PERCENT FOR A FEW HOURS
   DURING THE AFTERNOON ON WEDNESDAY.  STRONG WINDS AND UNSEASONABLY
   HIGH TEMPERATURES ARE NOT EXPECTED OVER THE REGION...SO A CRITICAL
   RISK WILL NOT BE ISSUED.
   
   ..LEVIT.. 11/28/2007
   
   ...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 281016
   
   DAY 2 FIRE WEATHER OUTLOOK  
   NWS STORM PREDICTION CENTER NORMAN OK
   0416 AM CST WED NOV 28 2007
   
   VALID 291200Z - 301200Z
   
   ...CRITICAL FIRE WEATHER AREA FOR COASTAL AREAS OF SW CA...
   
   ...SYNOPSIS...
   THE UPPER-AIR PATTERN OVER THE UNITED STATES REMAINS PROGRESSIVE AS
   A TROUGH DIGS INTO THE NEW ENGLAND AREA...AND ANOTHER TROUGH
   DEVELOPS INTO THE WESTERN U.S.  AHEAD OF THIS TROUGH IN THE HIGH
   PLAINS...A LEE CYCLONE WILL DEVELOP BRINGING STRONG AND GUSTY WINDS
   TO THE REGION. THE HIGH PRESSURE SYSTEM IN THE GREAT BASIN WILL MOVE
   TO THE SOUTHEAST WITH BEHIND A COLD FRONT THAT PROGRESSED THROUGH
   THE MIDWEST AND EASTERN U.S. DURING DAY1. THE PRESSURE GRADIENT WILL
   RELAX OVER CALIFORNIA...BUT RH VALUES WILL REMAIN LOW. 
   ADDITIONALLY...A BRIEF PERIOD OF LOW RH VALUES WILL BE POSSIBLE OVER
   THE SOUTHEASTERN STATES DURING THURSDAY AFTERNOON.
   
   ...CRITICAL FIRE WEATHER AREA - COASTAL AREAS OF SW CA...
   
   PRIMARY CONDITIONS: LOW RELATIVE HUMIDITY VALUES
   
   THE HIGH PRESSURE SYSTEM OVER THE GREAT BASIN WILL SHIFT
   SOUTHEASTWARD BEHIND A COLD FRONT THAT MOVED THROUGH THE REGION ON
   DAY 1...AND THE SURFACE PRESSURE GRADIENT OVER THE REGION WILL
   DIMINISH...DECREASING NORTHEASTERLY WIND SPEEDS.  HOWEVER...A DRY
   AIR MASS WILL REMAIN IN PLACE DURING THE DAY AND RELATIVE HUMIDITY
   VALUES WILL REMAIN LOW...AROUND 10 TO 15 PERCENT...WITH LOWER VALUES
   IN SOME AREAS.  THE SURFACE WIND DIRECTION WILL CHANGE TO ON-SHORE
   AND BECOME WESTERLY DURING THE AFTERNOON...BUT DURING THE OFF-SHORE
   PERIOD IN THE MORNING...THE WEAK GRADIENT WILL KEEP SPEEDS
   LOW...AROUND 10 TO 15 MPH WITH LOCALLY HIGHER GUSTS. A FIRE WEATHER
   RISK WILL EXIST DUE TO THE VERY LOW RH VALUES AND POTENTIAL FOR SOME
   WIND GUSTS IN LOCAL AREAS.
   
   ...WESTERN CA...
   RELATIVE HUMIDITY VALUES WILL REMAIN LOW DURING THE DAY...AROUND 20
   TO 25 PERCENT...BUT WIND SPEEDS WILL DECREASE AS THE SURFACE
   PRESSURE GRADIENT RELAXES.  TEMPERATURES WILL REACH AROUND 60
   F...AND A CRITICAL RISK IS NOT FORECAST DUE TO THE LIGHT WIND
   SPEEDS.
   
   ...HIGH PLAINS...
   A LEE CYCLONE WILL DEVELOP IN THE HIGH PLAINS AHEAD OF A TROUGH
   DIGGING INTO THE WEST COAST.  WIND SPEEDS WILL BE STRONG AND
   GUSTY...AROUND 30 TO 40 MPH SUSTAINED IN AREAS...BUT SURFACE
   TEMPERATURES WILL REMAIN COOL AND RELATIVE HUMIDITY VALUES WILL BE
   AROUND 20 TO 25 PERCENT IN AREAS.  GIVEN THE COOL TEMPERATURES...A
   CRITICAL FIRE RISK IS NOT EXPECTED.
   
   ...SERN STATES...
   DURING THE AFTERNOON...RH VALUES WILL FALL BELOW 30 PERCENT IN SOME
   AREAS...BUT WIND SPEEDS WILL BE LIGHT AND TEMPERATURES
   COOL...MITIGATING THE FIRE WEATHER RISK.
   
   ..LEVIT.. 11/28/2007
   
   ...PLEASE SEE WWW.SPC.NOAA.GOV/FIRE FOR GRAPHIC PRODUCT...
   
      

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