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    Day 2 FW Outlook >
May 22, 2013 Day 1 Fire Weather Outlook
Updated: Wed May 22 07:25:03 UTC 2013  (Print Version)
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
Critical 61,847 2,599,916 Las Vegas, NV...Henderson, NV...N. Las Vegas, NV...Flagstaff, AZ...Lake Havasu City, AZ...
   ZCZC SPCFWDDY1 ALL
   FNUS21 KWNS 220722
   
   DAY 1 FIRE WEATHER OUTLOOK  
   NWS STORM PREDICTION CENTER NORMAN OK
   0222 AM CDT WED MAY 22 2013
   
   VALID 221200Z - 231200Z
   
   ...CRITICAL FIRE WEATHER AREA FOR PORTIONS OF SRN NV...EXTREME NE CA
   AND MUCH OF NRN AZ...
   
   ...SYNOPSIS...
   ...PORTIONS OF SRN NV...EXTREME NE CA AND MUCH OF NRN AZ...
   DEEP LAYER WLY FLOW WILL INCREASE ACROSS THE SOUTHWESTERN U.S. TODAY
   AS A LARGE UPPER LOW OVER THE PACIFIC NW DIGS SOUTHWARD. DEVELOPING
   SFC LOW PRESSURE ACROSS THE GREAT BASIN WILL LEAD TO A TIGHTENING
   PRESSURE GRADIENT FROM NV INTO CNTRL AND SRN CA. AS TEMPERATURES
   WARM INTO THE 90S TO NEAR 100 DEGREES /LOWER IN THE MOUNTAINS/ DEEP
   BOUNDARY LAYER MIXING WILL OCCUR AND RH VALUES FALLING INTO THE
   10-15 PERCENT RANGE WILL BE WIDESPREAD. SUSTAINED WIND SPEEDS MAY BE
   SOMEWHAT MARGINAL IN THE 15-20 MPH RANGE...BUT GUSTY WINDS TO 30-35
   MPH WILL HELP TO ELEVATE THE FIRE WEATHER THREAT WHERE FUELS ARE DRY
   AND AT LEAST LOW-END CRITICAL CONDITIONS ARE EXPECTED FOR A FEW
   HOURS DURING THE AFTERNOON. STRONG WINDS AND LOW RH VALUES WILL
   EXTEND INTO THE SE CA DESERTS BUT LACK OF FUELS WILL LIMIT A
   WIDESPREAD THREAT IN THIS AREA.
   
   ...CENTRAL NV...SRN UT INTO SW CO...MUCH OF NM AND SRN AZ...
   MARGINAL CONDITIONS ARE EXPECTED SURROUNDING THE CRITICAL AREA. WIND
   SPEEDS WILL BE WEAKER TO THE EAST ACROSS NM AND SRN AZ...FURTHER
   REMOVED FROM STRONGEST MID LEVEL FLOW AND SFC PRESSURE GRADIENT.
   ACROSS SRN UT...A MIX OF DRY AND GREEN FUELS WILL LIMIT POTENTIAL IN
   THAT AREA.
   
   ...CENTRAL CA VALLEYS...
   BREEZY N WINDS ARE EXPECTED TO DEVELOP DURING THE MORNING AND
   PERSIST INTO THE AFTERNOON. SPEEDS OF 10-15 MPH WITH SOME HIGHER
   GUSTS ARE EXPECTED. RH VALUES WILL RANGE FROM 10-20 PERCENT AS
   TEMPERATURES WARM INTO THE 70S...LEADING TO AN ELEVATED FIRE THREAT.
   
   ..LEITMAN.. 05/22/2013
   
   ...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: May 22, 2013
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