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 010902
   
   DAY 1 FIRE WEATHER OUTLOOK  
   NWS STORM PREDICTION CENTER NORMAN OK
   0302 AM CST FRI DEC 01 2006
   
   VALID 011200Z - 021200Z
   
   ...NO CRITICAL AREAS...
   
   ...SYNOPSIS...
   AN INTENSE UPPER-LEVEL LOW OVER THE MID-MS RIVER VALLEY WILL LIFT
   QUICKLY NEWD ACROSS THE ERN GREAT LAKES...WHILE A SECONDARY LOW
   APPROACHES THE FAR UPPER MIDWEST. THESE SYSTEMS WILL PROVIDE BROAD
   CYCLONIC UPPER-LEVEL FLOW ACROSS MUCH OF THE CONUS...WITH A LARGE
   UPPER-LEVEL RIDGE OFF THE W COAST. EMBEDDED WITHIN THIS FLOW
   REGIME...A WEAK SHORTWAVE TROUGH WILL DROP SWD ACROSS THE NRN/CNTRL
   ROCKIES LATE TODAY INTO EARLY SATURDAY. SURFACE HIGH PRESSURE OVER
   THE FOUR CORNERS REGION WILL WEAKEN AS THIS TROUGH APPROACHES. A
   STRONGER AREA OF HIGH PRESSURE WILL BUILD SWD INTO THE PACIFIC NW
   BEHIND THE SHORTWAVE TROUGH.
   
   ...SRN CA COASTAL RANGE...
   OFFSHORE FLOW WILL CONTINUE TO DIMINISH AS A SURFACE HIGH WEAKENS
   ACROSS THE FOUR CORNERS AND MID/UPPER-LEVEL WIND SUPPORT REMAINS
   MINIMAL. RATHER LOW RH VALUES WILL REMAIN AWAY FROM THE IMMEDIATE
   COAST WITH A VERY DRY AIR MASS IN PLACE AS EVIDENCED BY 00Z NKX
   OBSERVED SOUNDING. TEMPERATURES THIS AFTERNOON NEAR THE COASTAL MTNS
   WILL WARM INTO THE 60S TO MID 70S WITH RH VALUES OF 5 TO 10 PERCENT.
   TOWARDS 12Z SAT...THE SURFACE PRESSURE GRADIENT WILL BEGIN TO
   INCREASE...AS HIGH PRESSURE STRENGTHENS OVER THE NRN GREAT BASIN.
   LOCALLY GUSTY WINDS MAY DEVELOP MAINLY ACROSS THE SAN GABRIEL MTNS.
   HOWEVER...MORE WIDESPREAD SUSTAINED WINDS IN EXCESS OF 20 MPH DO NOT
   APPEAR LIKELY UNTIL LATER ON SATURDAY MORNING...AND THIS HAS
   NECESSITATED A DOWNGRADE FROM CRITICAL.
   
   ...LOWER CO RIVER VALLEY...
   A VERY DRY LOW-LEVEL AIR MASS WILL MODIFY FROM RELATIVELY COOL
   CONDITIONS ON WED/THU. TEMPERATURES WILL WARM INTO THE 60S WITH DEW
   POINTS AROUND 0 TO 5 DEGREES THIS AFTERNOON. THIS WILL ALLOW RH
   VALUES TO FALL TO AROUND 5 TO 10 PERCENT. AFTERNOON WINDS WILL BE
   LIGHT...GENERALLY UNDER 10 MPH.
   
   ..GRAMS.. 12/01/2006
   
   ...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 010947
   
   DAY 2 FIRE WEATHER OUTLOOK  
   NWS STORM PREDICTION CENTER NORMAN OK
   0347 AM CST FRI DEC 01 2006
   
   VALID 021200Z - 031200Z
   
   ...CRITICAL FIRE WEATHER AREA FOR SRN CA COASTAL RANGE...
   
   ...SYNOPSIS...
   AN AMPLIFIED UPPER-LEVEL TROUGH WILL PERSIST ACROSS THE CNTRL
   CONUS...WITH A LARGE RIDGE MOVING GRADUALLY ONSHORE ALONG THE W
   COAST. AN EXPANSIVE AREA OF SURFACE HIGH PRESSURE WILL GRADUALLY
   SHIFT SEWD FROM THE PACIFIC NW/NRN ROCKIES TOWARDS THE CNTRL
   ROCKIES/NRN PLAINS. A WEAK SURFACE TROUGH WILL REMAIN JUST OFF THE
   CA COAST...MAINTAINING OFFSHORE FLOW ACROSS SRN CA.
   
   ...CRITICAL FIRE WEATHER AREA - SRN CA COASTAL RANGE...
   
   PRIMARY CONDITIONS: STRONG WINDS / LOW RH / LONG-TERM DRYNESS
   
   OFFSHORE WINDS WILL INCREASE AS THE SURFACE PRESSURE GRADIENT
   TIGHTENS WITH HIGH PRESSURE EXPANDING ACROSS THE ERN GREAT BASIN.
   ALTHOUGH MID-LEVEL WIND SUPPORT WILL BE MINIMAL...THE STRONG
   GRADIENT FLOW WILL ALLOW LOCALLY GUSTY WINDS IN EXCESS OF 30 MPH TO
   DEVELOP AS EARLY AS SAT MORNING. EVEN STRONGER WINDS ARE LIKELY SAT
   EVENING INTO EARLY SUN WHEN THE PRESSURE GRADIENT MAXIMIZES.
   SUSTAINED WINDS OF 25 TO 35 MPH SHOULD OCCUR IMMEDIATELY DOWNSLOPE
   OF THE COASTAL MTNS ACROSS PASSES/CANYONS. RH VALUES SAT AFTERNOON
   SHOULD BECOME QUITE LOW ONCE AGAIN IN THESE AREAS...FROM 5 TO 10
   PERCENT WITH TEMPERATURES IN THE 60S TO MID 70S. POOR OVERNIGHT RH
   RECOVERY CAN ALSO BE EXPECTED GIVEN THE STRENGTH OF THE DOWNSLOPE
   WINDS.
   
   ...LOWER CO RIVER VALLEY...
   NLY WINDS WILL LIKELY INCREASE AS HIGH PRESSURE INTENSIFIES OVER THE
   INTERMOUNTAIN WEST. MODEL GUIDANCE INDICATES A 25 TO 35 MPH
   LOW-LEVEL JET SHOULD DEVELOP SAT AFTERNOON. HOWEVER...FORECAST
   SOUNDINGS INDICATE A RATHER SHALLOW BOUNDARY LAYER AND THIS WILL
   TEND TO MITIGATE STRONG MECHANICAL MIXING. SUSTAINED WINDS WILL
   LIKELY RANGE FROM 15 TO 20 MPH. TEMPERATURES SHOULD ALSO BE SLIGHTLY
   COOLER COMPARED TO FRI...MAINLY IN THE UPPER 50S TO MIDDLE 60S. THIS
   WILL SUPPORT MIN RH VALUES OF 10 TO 15 PERCENT.
   
   ..GRAMS.. 12/01/2006
   
   ...PLEASE SEE WWW.SPC.NOAA.GOV/FIRE FOR GRAPHIC PRODUCT...
   
      

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