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    Day 2 FW Outlook >
Apr 27, 2015 Day 1 Fire Weather Outlook
Updated: Mon Apr 27 06:48:02 UTC 2015 (Print Version | 20150427 1200Z Day 1 FireWX shapefile | 20150427 1200Z Day 1 FireWX KML)
Day 1 Fire
 Population  Cities/Towns  CWAs  Interstates  Counties  FEMA Regions  Day 1 Surface Analysis

Risk Area (sq. mi.) Area Pop. Some Larger Population Centers in Risk Area
No Risk Areas Forecast
   ZCZC SPCFWDDY1 ALL
   FNUS21 KWNS 270643

   DAY 1 FIRE WEATHER OUTLOOK  
   NWS STORM PREDICTION CENTER NORMAN OK
   0143 AM CDT MON APR 27 2015

   VALID 271200Z - 281200Z

   ...SYNOPSIS...
   IN THE MID LEVELS...A MULTI-STREAM FLOW PATTERN WILL COVER THE
   CONUS. A CYCLONE EMBEDDED WITHIN THE SRN STREAM WILL TRACK ACROSS
   THE SRN PLAINS...WHILE THE SRN EXTENT OF A SHORTWAVE TROUGH TRACKING
   ACROSS PARTS OF THE CANADIAN PRAIRIE PROVINCES TRAVERSES PORTIONS OF
   THE NRN PLAINS. W OF THESE FEATURES...A MID-LEVEL RIDGE WILL
   PROGRESS EWD ACROSS PARTS OF THE WRN STATES. A SFC ANTICYCLONE OVER
   PARTS OF THE CNTRL GREAT BASIN WILL WEAKEN AS SUBSIDENT FLOW ALOFT
   BETWEEN THE AFOREMENTIONED CYCLONE AND TROUGH...AND THE UPSTREAM
   RIDGE...LESSENS. FARTHER W...A MID-LEVEL IMPULSE WILL APPROACH THE
   PACIFIC NW LATE IN THE PERIOD.

   ...PORTIONS OF THE SRN CA COASTAL RANGES AND ADJACENT FOOTHILLS...
   THE PRESSURE GRADIENT WILL BE RELATIVELY ENHANCED THROUGH THIS
   MORNING ACROSS THE AREA -- I.E. ON THE SWRN PERIPHERY OF THE CNTRL
   GREAT BASIN ANTICYCLONE. AS A RESULT...NELY TO ENELY SFC WINDS
   AROUND 15-20 MPH /STRONGER ON AN ISOLATED BASIS/ WITH HIGHER GUSTS
   ARE EXPECTED TO OCCUR THROUGH THIS MORNING ACROSS THE COASTAL RANGES
   AND ADJACENT FOOTHILLS OF LOS ANGELES AND VENTURA COUNTIES AND
   VICINITY. THE STRONGEST WINDS ARE EXPECTED TO OCCUR THROUGH FAVORED
   PASSES AND CANYONS. DOWNSLOPE-FLOW-ENCOURAGED WARMING/DRYING WILL
   SUPPORT RH VALUES FALLING TO 10-20 PERCENT THROUGH THE DAY AS
   DIURNAL HEATING OCCURS. THESE FACTORS WILL SUPPORT ELEVATED TO
   PERHAPS LOCALLY/BRIEFLY BORDERLINE-CRITICAL FIRE WEATHER CONDITIONS.
   HOWEVER...THE SFC PRESSURE GRADIENT IS FORECAST TO WEAKEN THROUGH
   THE DAY...YIELDING A DECREASE IN WIND SPEEDS WHILE RH IS LOWERING.
   THIS SHOULD MINIMIZE THE TEMPORAL OVERLAP OF CRITICALLY STRONG WINDS
   WITH CRITICALLY LOW RH. FURTHERMORE...FUELS ARE ONLY MARGINALLY DRY
   ACROSS THE AREA...WITH SOME LOCATIONS HAVING RECEIVED RECENT
   PRECIPITATION TO FURTHER FACILITATE FUEL MOISTENING. FOR THESE
   REASONS...A CRITICAL AREA HAS NOT BEEN INCLUDED.

   ..COHEN/COOK.. 04/27/2015

   ...PLEASE SEE WWW.SPC.NOAA.GOV/FIRE FOR GRAPHIC PRODUCT...

   CLICK FOR DAY 1 FIREWX AREAL OUTLINE PRODUCT (KWNSPFWFD1)
      
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Page last modified: April 27, 2015
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