Storm Prediction Center
Day 1 and Day 2 Fire Weather Outlooks

Day 1 Fire Weather Forecast graphic

   ZCZC SPCFWDDY1 ALL
   FNUS21 KWNS 300437
   
   DAY 1 FIRE WEATHER OUTLOOK  
   NWS STORM PREDICTION CENTER NORMAN OK
   1137 PM CDT THU SEP 29 2005
   
   VALID 301200Z - 011200Z
   
   ...NO CRITICAL AREAS...
   
   ...SYNOPSIS...
   ZONAL UPPER LEVEL PATTERN WILL CONTINUE ACROSS THE NATION
   TODAY...WITH LOW AMPLITUDE UPPER TROUGHS MOVING THROUGH THE FLOW
   ACROSS THE NRN TIER OF STATES. GRADUAL AMPLIFICATION OF A BROADER
   TROUGH IS EXPECTED TO OCCUR OVER THE PAC NW DURING THE LATTER HALF
   OF THE PERIOD. MODERATE WINDS WILL BE LIKELY EARLY IN THE PERIOD
   OVER THE NRN HIGH PLAINS...BUT A GRADUAL WEAKENING SFC PRESSURE
   GRADIENT AND LESSENING OF THE MID LEVEL FLOW WILL LIMIT A PROLONGED
   MODERATE WIND EVENT AND CRITICAL FIRE WEATHER CONDITIONS OVER THE
   NRN HIGH PLAINS TODAY. FARTHER SW...AS THE UPPER LEVEL FLOW
   STRENGTHENS OVER THE PAC NW...THE LEE TROUGH OVER ERN ORE/WA AND
   NWRN NV WILL INTENSIFY. THIS WILL LEAD TO INCREASING SWLY WINDS AND
   NEAR CRITICAL FIRE WEATHER CONDITIONS TO PORTIONS OF THE NRN GREAT
   BASIN. ELSEWHERE ACROSS THE REMAINDER OF THE WEST...A BROAD UPPER
   RIDGE WILL SUPPORT ABOVE NORMAL TEMPERATURES AND RH READINGS FROM
   10-15 PERCENT ACROSS MOST OF THE INTERIOR WEST. HOWEVER WEAK WINDS
   /SUSTAINED LESS THAN 10 MPH/ WILL PRECLUDE ANY CRITICAL FIRE WEATHER
   THREATS. OVER THE EAST...A BROAD AREA OF HIGH PRESSURE AND
   ASSOCIATED LOW RH READINGS AROUND 30 PERCENT WILL MOVE EWD ACROSS
   THE OHIO VALLEY/ERN GREAT LAKES AND INTO THE APPALACHIANS. A
   COMBINATION OF RECENT RAINFALL AND LIGHT WINDS WILL PRECLUDE ANY
   FIRE WEATHER CONCERNS IN THIS REGION.
   
   ...NRN HIGH PLAINS...
   MODERATE WINDS WILL BE ONGOING OR DEVELOP DURING THE MORNING AS
   STEEP LAPSE RATES IN THE LOW-MID LEVELS WILL CO-EXIST WITH STRONG
   MID LEVEL WINDS. DEPARTURE OF AN UPPER LEVEL TROUGH AND GRADUAL
   WEAKENING OF THE MID LEVEL WIND FIELDS AND SFC PRESSURE GRADIENT
   WILL AID IN A DIMINISHING OF THE SFC WINDS DURING THE AFTERNOON
   HOURS TO LESS THAN 20 MPH. THUS DESPITE LOW RH READINGS THROUGH MOST
   OF THE DAY WITH TEMPERATURES IN THE LOWER 80S...OVERALL THREAT DOES
   NOT APPEAR SUFFICIENT FOR A CRITICAL FIRE WEATHER OUTLOOK AREA. 
   
   ...NRN GREAT BASIN...
   INCREASING MID LEVEL SWLY FLOW AHEAD OF DEEPENING UPPER LEVEL TROUGH
   OVER THE SRN GULF OF ALASKA WILL AID IN INTENSIFYING THE SFC LEE
   TROUGH EAST OF THE CASCADES AND NRN SIERRA NEVADA. TO THE SE OF THIS
   TROUGH AND APPROACHING SFC COLD FRONT AN INCREASING SFC PRESSURE
   GRADIENT WILL SUPPORT SWLY WINDS OF 10-20 MPH DURING THE AFTERNOON
   HOURS. MIN RH READINGS WILL AGAIN BE LOW /8-12 PERCENT/ DUE TO
   PRESENCE OF DRY AIR AND ABOVE NORMAL TEMPERATURES IN THE 80S OVER
   LOWER ELEVATIONS.
   
   ..CROSBIE.. 09/30/2005
   
   ...PLEASE SEE WWW.SPC.NOAA.GOV/FIRE FOR GRAPHIC PRODUCT...
   
      
Day 2 Fire Weather Forecast graphic

   ZCZC SPCFWDDY2 ALL
   FNUS22 KWNS 301823
   
   DAY 2 FIRE WEATHER OUTLOOK CORR 1
   NWS STORM PREDICTION CENTER NORMAN OK
   0123 PM CDT FRI SEP 30 2005
   
   VALID 011200Z - 021200Z
   
   CORRECTED FOR GRAPHIC
   
   ...CRITICAL FIRE WEATHER AREA FOR THE NRN GREAT BASIN AND PORTIONS
   OF THE NRN ROCKIES...
   
   ...SYNOPSIS...
   DEEPENING OF THE UPPER TROUGH OVER THE PAC NW WILL OCCUR DURING THE
   PERIOD. STRONG MID LEVEL FLOW WILL SUPPORT LEE CYCLOGENESIS OVER MT
   LEADING TO MODERATE SUSTAINED SWLY WINDS OF 20-25 MPH AHEAD OF A
   COLD FRONT ACROSS MUCH OF THE NRN GREAT BASIN INTO THE NRN ROCKIES.
   FURTHER SOUTH/EAST...SWLY WINDS WILL DIMINISH BUT PRESENCE OF A
   LARGE AREA OF HIGH PRESSURE AT MID/UPPER LEVELS WILL SUPPORT
   CONTINUED LOW RH READINGS FOR THE REST OF THE INTERIOR WEST.
   ELSEWHERE....A BROAD AREA OF SFC HIGH PRESSURE WILL EXIST OVER THE
   ERN HALF OF THE NATION. BETWEEN THE STRENGTHENING SFC LEE TROUGH
   OVER THE HIGH PLAINS AND THIS SFC HIGH...THE PRESSURE GRADIENT AND 
   SLY WINDS WILL INCREASE OVER THE NRN/CENTRAL HIGH PLAINS. LOW RH
   READINGS IN PORTIONS OF THIS AREA WILL LEAD TO NEAR CRITICAL FIRE
   WEATHER CONDITIONS.
   
   ...CRITICAL FIRE WEATHER AREA 1 - FAR NERN CA...NRN/CENTRAL NV NEWD
   ACROSS CENTRAL/ERN ID...WRN WY AND SWRN MT...
   
   PRIMARY CONDITIONS: SUSTAINED SWLY WINDS FROM 20-25 MPH...WITH GUSTS
   OVER 35 MPH. MIN RH READINGS 10-15 PERCENT
   
   AHEAD OF A COLD FRONT...STRENGTHENING SWLY COMPONENT TO THE MID
   LEVEL WINDS WILL AID IN DEEPENING A SFC LOW OVER MT DURING THE
   PERIOD. TO THE SOUTH OF THIS LOW...STEEP LAPSE RATES COMBINED WITH
   INCREASING PRESSURE GRADIENT WILL SUPPORT MODERATE SWLY SFC WIND
   DEVELOPMENT EARLY IN THE PERIOD. PRE-EXISTING CONTINENTAL AIRMASS
   ALONG WITH ABOVE NORMAL TEMPERATURES WILL SUPPORT MIN RH READINGS
   FROM 10-15 PERCENT OVER THE REGION. THE COMBINATION OF LOW RH
   READINGS AND MODERATE WINDS WILL SUPPORT A CRITICAL FIRE WEATHER
   THREAT. PORTIONS OF THE NRN GREAT BASIN...I.E NERN CA...NRN
   NV/CENTRAL ID SHOULD SEE A FRONTAL PASSAGE OVERNIGHT...WITH CRITICAL
   FIRE WEATHER CONDITIONS ENDING QUICKLY WITH THE PASSAGE.
   
   ...NRN HIGH PLAINS...
   TO THE EAST OF THE LEE TROUGH/SFC LOW OVER CENTRAL MT...AN
   INCREASING PRESSURE GRADIENT WILL SUPPORT AT LEAST SLY WINDS FROM
   15-20 MPH DURING THE AFTERNOON. LACK OF MOISTURE RETURN /LOW DEWPTS/
   AND ABOVE NORMAL TEMPERATURES IN THE 80S/LOWER 90S WILL SUPPORT MIN
   RH READINGS AROUND 15 PERCENT. AREA WILL BE MONITORED FOR HIGHER
   WINDS AND POSSIBLE UPGRADE IN A LATER FCST.
   
   ..CROSBIE.. 09/30/2005
   
   ...PLEASE SEE WWW.SPC.NOAA.GOV/FIRE FOR GRAPHIC PRODUCT...
   
      

Fire Weather/Forecast Products/Home