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 080909
   
   DAY 1 FIRE WEATHER OUTLOOK  
   NWS STORM PREDICTION CENTER NORMAN OK
   0409 AM CDT FRI SEP 08 2006
   
   VALID 081200Z - 091200Z
   
   ...CRITICAL FIRE WEATHER AREA FOR CNTRL AND ERN WA AND ORE....FAR
   NWRN ID...
   
   ...SYNOPSIS...
   AN UPPER SHORTWAVE TROUGH WILL AFFECT THE PACIFIC NW LATE TODAY WITH
   GUSTY AND SHIFTING WINDS WITH COLD FRONT. THIS WILL HAVE AN ADVERSE
   EFFECT ON ONGOING FIRES WHICH WILL BE WITHIN THE THERMAL RIDGE
   DURING THE DAYTIME. ALONG AND AHEAD OF THIS FRONT...SCATTERED
   THUNDERSTORMS WILL OCCUR...AND SOME WILL BE DRY. THE RIDGE WILL
   EXTEND SWD OUT OF ERN WA/OR INTO NV AND SRN CA. WINDS WILL ALSO
   INCREASE ACROSS MUCH OF CA WHERE IT WILL REMAIN WARM...BUT RH WILL
   RISE IN MANY LOCALS AS WELL.
   
   TO THE EAST...A LARGE UPPER TROUGH WILL STRETCH FROM THE NRN PLAINS
   INTO THE GREAT LAKES...WITH SURFACE HIGH BEHIND A COLD FRONT
   EXTENDING FROM MI TO SRN NEB LATE TODAY. THIS WILL RESULT IN GUSTY
   SELY WINDS OVER MUCH OF MT WY AND THE DAKOTAS...WITH ONLY MARGINALLY
   LOW RH VALUES MOST PLACES.
   
   ...CRITICAL FIRE WEATHER AREA - CNTRL AND ERN WA AND OREGON....FAR
   NWRN ID...
   
   PRIMARY CONDITIONS: STRONG WIND SHIFT WITH ONGOING FIRES AND
   SCATTERED DRY THUNDER
   
   A STRONG UPPER LEVEL SHORTWAVE TROUGH WILL MOVE ASHORE AND INTO WRN
   WA/OREGON LATE FRIDAY. MEANWHILE...THERMAL RIDGE WILL SET UP ACROSS
   ERN WA/OREGON...WHERE IT WILL BE WARM AND DRY.
   
   AS UPPER TROUGH CONTINUES EWD...PACIFIC COLD FRONT WILL SURGE
   EWD...WITH THE STRONGEST WINDS COMING THROUGH PASSES AND CANYONS
   INCLUDING THE COLUMBIA GORGE. STRONG WLY WINDS OF 15-25 MPH WILL BE
   COMMON MAINLY LATE IN THE DAY INTO THE EVENING...WITH SPEEDS OVER 30
   MPH IN FAVORED GORGE LOCATIONS. ALTHOUGH RH LEVELS WILL INCREASE
   WITH FRONTAL PASSAGE...THE WINDS MAY CAUSE A CHANGE IN DIRECTION
   WITH THE WILDFIRES.
   
   IN ADDITION...SCATTERED THUNDERSTORMS...SOME DRY...WILL OCCUR OVER
   CNTRL AND NERN OREGON AS WELL AS SERN WA AND INTO ID. THE STORMS
   WILL LIKELY PERSIST WELL INTO THE EARLY MORNING HOURS AS THEY SHIFT
   EWD INTO ID.
   
   ...NRN AND SRN CA...
   A MARINE AIR MASS WILL MOVE INLAND DUE TO DEEPENING LOW OVER THE
   GREAT BASIN AND SRN CA DESERTS. THIS WILL CAUSE THE USUAL GUSTY WLY
   WINDS THROUGH PASSES AND CANYONS...WITH LOWEST RH IN DOWNSLOPE
   REGIONS. OF SPECIAL NOTE ARE ONGOING FIRES ALONG THE LOS
   ANGELES/VENTURA COUNTY LINE AS WELL AS OVER PLACER COUNTY IN NRN
   CA...BOTH OF WHICH MAY EXPERIENCE GUSTY WINDS. THE WORST CONDITIONS
   ON THE SMALL SCALE WILL LIKELY BE OVER SRN CA...WHERE A MDT HAINES
   INDEX WILL BE IN PLACE IN ADDITION TO THE GUSTY WINDS.
   
   ...CNTRL AND SRN MONTANA...
   GUSTY WINDS AND LOW RH WILL MATERIALIZE BY LATE AFTERNOON...AS HIGH
   PRESSURE TO THE EAST CAUSES ELY WINDS NEAR 15 MPH. STRONG HEATING
   SHOULD ALLOW STRONGER GUSTS TO DEVELOP. MIN RH LEVELS SHOULD AVERAGE
   15-20 PERCENT AT PEAK HEATING.
   
   ..JEWELL.. 09/08/2006
   
   ...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 080952
   
   DAY 2 FIRE WEATHER OUTLOOK  
   NWS STORM PREDICTION CENTER NORMAN OK
   0452 AM CDT FRI SEP 08 2006
   
   VALID 091200Z - 101200Z
   
   ...NO CRITICAL AREAS...
   
   ...SYNOPSIS...
   PACIFIC NW COLD FRONT WILL SHIFT FROM WRN ID INTO WRN MT/SERN ID
   DURING THE DAY...AS UPPER SHORTWAVE TROUGH SWINGS NEWD INTO SWRN
   CANADA. RAIN AND STORMS WILL OCCUR ALONG AND AHEAD OF THE
   FRONT...WHILE BEHIND THE FRONT...WLY WINDS WILL BLOW WITH MARGINALLY
   LOW RH LEVELS BY AFTERNOON OVER ERN WA AND OREGON.
   
   FARTHER S...DRIER AIR WILL INFILTRATE INTO THE GREAT BASIN AFTER
   SEVERAL DAYS OF STORMS. MEANWHILE...SPRAWLING SURFACE HIGH PRESSURE
   WILL SHIFT SLOWLY EWD ACROSS SRN CANADA AND THE NRN PLAINS/UPPER MS
   VALLEY REGION. MODERATE SELY WINDS WILL THUS OCCUR OVER ERN MT/WY
   INTO THE DAKOTAS.
   
   ...SRN CA INTO SRN AND CNTRL NV...
   WEAK UPPER RIDGING WILL OCCUR IN WAKE OF RECENT TROUGH PASSAGE.
   THUS...AN EXTREMELY DRY AIR MASS WILL EXIST SAT AFTERNOON WITH MIN
   RH RANGING FROM THE SINGLE DIGITS SRN CA DESERTS INTO SRN NV TO
   10-15 PERCENT OVER THE REST OF NV. WINDS WILL AVERAGE NEAR 15 MPH
   OUT OF THE SW ACROSS THE REGION...WITH LOCALLY STRONGER GUSTS GIVEN
   STRONG MIXING AND A MDT HAINES INDEX.
   
   ...CNTRL/ERN WA AND OREGON...
   POST FRONTAL WLY FLOW WILL EXIST SATURDAY WITH SUSTAINED WINDS OF
   15-20 MPH ALONG THE E SLOPES OF THE WA AND OREGON CASCADES...AND
   INTO THE COLUMBIA GORGE. RH WILL GRADUALLY FALL INTO THE 20 PERCENT
   RANGE WHERE TEMPERATURES REACH THE 80S.
   
   ...E CENTRAL NV...
   ISOLATED DRY THUNDERSTORMS ARE LIKELY TO FORM WITHIN WEAK SURFACE
   TROUGH ACROSS E CNTRL NV...AIDED BY SRN EDGE OF UPPER TROUGH IN
   PRODUCING UPWARD VERTICAL MOTION. SUB-CLOUD RH LEVELS WILL BE ONLY
   MARGINALLY LOW FOR SIGNIFICANT DRY THUNDER...THUS...A MIXTURE OF WET
   AND DRY STORMS IS ANTICIPATED.
   
   ..JEWELL.. 09/08/2006
   
   ...PLEASE SEE WWW.SPC.NOAA.GOV/FIRE FOR GRAPHIC PRODUCT...
   
      

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