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Displaying AFOS PIL: FWDDY1 Product Timestamp: 2001-04-21 09:00 UTC
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000 FNUS21 KWNS 210913 FWDDY1 STORM PREDICTION CENTER...NWS/NCEP...NORMAN OK 400 AM CDT SAT APR 21 2001 DAY 1 FIRE WEATHER OUTLOOK...REF AWIPS GRAPHIC PMWE98 KWNS VALID 211200-221200 ...CRITICAL FIRE WEATHER AREA FOR SRN PORTIONS OF THE ROCKIES/HIGH PLAINS... ...SYNOPSIS... STRONG UPPER TROUGH APPROACHING THE UPPER MS VALLEY THIS MORNING WILL TRACK NE OVER THE GREAT LAKES REGION TODAY AS IT DEAMPLIFIES. THE COLD FRONT ASSOCIATED WITH THIS SYSTEM IS FORECAST TO EXTEND FROM ERN MI TO CENTRAL KS BY SUNDAY MORNING. WATER VAPOR IMAGERY SHOWS A SECOND VIGOROUS UPPER LOW DIGGING SEWD OVER CENTRAL CA THIS MORNING. SURFACE CYCLOGENESIS IS EXPECTED OVER SERN CO DURING THE AFTERNOON/OVERNIGHT AS THE CA UPPER LOW APPROACHES THE FOUR CORNERS REGION. MEANWHILE...AN UPPER RIDGE WILL BUILD N OVER THE ERN U.S. AS A SURFACE HIGH REMAINS CENTERED OVER THE WRN ATLANTIC AND EXTENDS SWD INTO THE GULF COAST STATES. ...CRITICAL FIRE WEATHER AREA 1 - MUCH OF NM / EXTREME WRN TX/OK PANHANDLES AND EXTREME SERN CO... PRIMARY CONDITIONS: STRONG SW WINDS / LOW AFTERNOON RH SWLY LOW-LEVEL WINDS ARE FORECAST TO INCREASE BY LATE MORNING AT 20-30 MPH. A FURTHER INCREASE IN WIND SPEED TO 25-35 MPH IS EXPECTED DURING THE AFTERNOON AS THE SURFACE PRESSURE GRADIENT TIGHTENS OVER THE REGION IN RESPONSE TO THE SURFACE CYCLOGENESIS OVER SERN CO. AFTERNOON TEMPERATURES IN THE MID 70S TO UPPER 80S COMBINED WITH RH VALUES AROUND 15 PERCENT AND STRONG SWLY WINDS WILL INCREASE THE POTENTIAL FOR WIND-DRIVEN FIRES. THE APPROACH OF THE UPPER TROUGH IS EXPECTED TO BACK THE LOW-LEVEL WINDS TO THE SSE OVER EXTREME ERN NM/WRN TX BY LATE AFTERNOON. RH VALUES SHOULD THEN RISE ABOVE CRITICAL VALUES AS LOW-LEVEL MOISTURE RETURNS TO THIS REGION...DECREASING THE FIRE WEATHER THREAT OVER EXTREME ERN PORTIONS OF THE OUTLOOK AREA. ELSEWHERE OVER THE OUTLOOK AREA...WINDS WILL VEER TO THE WEST DURING THE EVENING AND DIMINISH TO 15-25 MPH. ...FL... LOW-LEVEL ELY WINDS OVER FL AND SLY WINDS OVER GA INTO THE CAROLINAS WILL INCREASE MOISTURE INTO THE SERN U.S. WITH AFTERNOON RH VALUES EXPECTED TO BE ABOVE CRITICAL VALUES. DESPITE WIND SPEEDS UP TO 15 MPH...THE HIGHER RH VALUES WILL DECREASE THE CRITICAL FIRE WEATHER THREAT TODAY. ..PETERS.. 04/21/01 DAY1/DAY2 FIRE WEATHER TEXT/GRAPHICS OUTLOOKS ARE AVAILABLE AT WWW.SPC.NOAA.GOV/FIRE NNNN