Storm Prediction Center
Day 1 and Day 2 Fire Weather Outlooks
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FNUS21 KWNS 020837
STORM PREDICTION CENTER...NWS/NCEP...NORMAN OK
400 AM CDT FRI MAY 02 2003
DAY 1 FIRE WEATHER OUTLOOK...REF AWIPS GRAPHIC PMWE98 KWNS
VALID 021200-031200
...CRITICAL FIRE WEATHER AREA FOR - (SRN UT/NRN AZ/NWRN NM)...
...SYNOPSIS...
A LARGELY PROGRESSIVE SYNOPTIC PATTERN IS EXPECTED ACROSS MUCH OF
THE U.S. DURING THE DAY ONE FORECAST PERIOD AHEAD OF AN INTENSE
SCNTRL PACIFIC STORM SYSTEM PROGGED TO TRANSLATE INLAND AROUND
03/12Z. A MID-UPPER LVL TROUGH OVER THE OHIO VALLEY/ERN LAKES
REGION AND AN ASSOCIATED COLD FRONTAL BOUNDARY WILL BE RESPONSIBLE
FOR NUMEROUS SHWRS/TSTMS FROM MAINE SWWD TO ERN TX AS CANADIAN HIGH
PRESSURE MOVES INTO THE LAKES REGION. IN THE WEST...JUST AHEAD OF
THE WRN U.S. STORM SYSTEM MUCH OF CA IS EXPECTED TO EXPERIENCE
WIDESPREAD SHWRS/TSTMS WITH STRONG ONSHORE FLOW OFF THE PACIFIC
THRU THE PERIOD. FURTHER EAST...INTO THE SWRN STATES...MUCH DRIER
AIR WILL BE LOCATED ALONG WITH AN INCREASING WIND REGIME ASSOCIATED
WITH THE WRN U.S. STORM SYSTEM TO YIELD A FIRE WEATHER THREAT.
...CRITICAL FIRE WEATHER AREA 1 - (SRN UT/NRN AZ/NWRN NM)...
PRIMARY CONDITIONS: STRONG SWLY WINDS / LOW RH VALUES / VERY HIGH
TO EXTREME FIRE DANGER READINGS / DRY FUELS
AS THE ERN PACIFIC STORM SYSTEM BEGINS TO OPEN UP AND EJECT EWD
ONTO THE CA COAST VERY STRONG SWLY WINDS ARE EXPECTED TO AFFECT THE
CRITICAL AREA. LATEST MODEL GUIDANCE SUGGESTS THE NOSE OF THE MID-
LVL JET MAXIMUM WILL TRANSLATE OVER THESE AREAS AROUND 03/00Z AND
WITH STEEP LAPSE RATES AND ABRUPT DOWNWARD MOMENTUM TRANSFER EXPECT
SUSTAINED SURFACE WINDS FROM 20-30 MPH WITH FREQUENT HIGHER GUSTS.
AFTERNOON MINIMUM RH VALUES TO RANGE FROM 10-20 PERCENT WITH HIGH
TEMPERATURES FROM THE MID 60S INTO THE MID 70S. GIVEN THAT RECENT
FIRE DANGER ADJECTIVE RATINGS WERE IN THE VERY HIGH TO EXTREME
CATEGORY AND THAT 10/100 HOUR FUEL READINGS WERE IN THE 2-6 PERCENT
RANGE...CRITICAL FIRE WEATHER CONDITIONS ARE ANTICIPATED.
...NWRN WI/CNTRL AND NRN MN/ERN ND...
IN A REGION WITH UNDERLYING ABNORMALLY DRY TO EXTREME LONG TERM
DROUGHT CONDITIONS...EXPECT SOME MARGINAL FIRE WEATHER DIFFICULTIES
THRU THE PERIOD. RECENT COOP RAINFALL REPORTS INDICATE THESE AREAS
HAVE BEEN PRECIPITATION FREE SINCE 4/20/03 AND SHOULD ENCOUNTER
ANOTHER VERY DRY...WARM...AND MARGINALLY WINDY DAY ON FRIDAY. AS
THE CENTER OF A SURFACE ANTICYCLONE SHIFTS EWD TODAY...EXPECT
MINIMUM RH VALUES TO RANGE FROM 15-25 PERCENT...AFTERNOON HIGHS TO
RANGE FROM AROUND 60 INTO THE LOW 70S WITH INCREASING SSELY WINDS
FROM 10-20 MPH. WIND SPEEDS WILL INCREASE...ESPECIALLY FURTHER WEST
BETWEEN 03/00Z AND 03/06Z BUT GOOD RH RECOVERIES ARE EXPECTED.
..NADEN.. 05/02/03
SPC FIRE WEATHER OUTLOOKS ARE AVAILABLE AT WWW.SPC.NOAA.GOV/FIRE
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FNUS22 KWNS 020952
STORM PREDICTION CENTER...NWS/NCEP...NORMAN OK
500 AM CDT FRI MAY 02 2003
DAY 2 FIRE WEATHER OUTLOOK...REF AWIPS GRAPHIC PMWI98 KWNS
VALID 031200-041200
...CRITICAL FIRE WEATHER AREA FOR - (NM/ERN AZ/WRN TX/SERN UT/SRN
CO)...
...SYNOPSIS...
THE TRANSLATION OF AN IMPULSE FROM THE GULF OF ALASKA QUICKLY SWD
INTO THE PAC NW WILL ACT TO EJECT THE OFFSHORE MID-LVL LOW EWD OVER
THE SWRN U.S.. FURTHER EAST...AN IMPULSE WILL MOVE ACROSS THE OHIO
VALLEY TO THE ERN SEABOARD WITH WEAK SHORTWAVE RIDGING IN ITS WAKE
ACROSS THE ERN PLAINS/MISSISSIPPI VALLEY. LEE TROUGHING WILL BE
INDUCED THRU THE PERIOD AIDING IN THE INTENSIFICATION OF A CYCLONE
FROM ERN CO INTO NCNTRL KS BY 04/12Z.
...CRITICAL FIRE WEATHER AREA 1 - (NM/ERN AZ/WRN TX/SERN UT/SRN
CO)...
PRIMARY CONDITIONS: STRONG SWLY WINDS / LOW RH VALUES / WARM
TEMPERATURES / VERY HIGH TO EXTREME FIRE DANGER READINGS
THE ERN PACIFIC MID-UPPER LVL TROUGH IS PROGGED TO OPEN UP AND
EJECT ENEWD ACROSS THE SWRN STATES THRU THE PERIOD AND WILL BE
ASSOCIATED WITH A VERY STRONG WIND REGIME YIELDING CRITICAL FIRE
WEATHER CONDITIONS. THE NEWEST MODEL DATA INDICATES AN 80 KT MID-
LVL JET STREAK WILL TRAVERSE THE REGION DURING THE PERIOD LIKELY
YIELDING SUSTAINED SWLY SURFACE WINDS FROM 20-35 KTS WITH FREQUENT
HIGHER GUSTS. EXPECT MINIMUM RH VALUES BETWEEN 10-20 PERCENT WHILE
HIGH TEMPERATURES WILL RANGE BETWEEN 70-85 DEGREES. ETA ENSEMBLE
MODEL GUIDANCE SUGGESTS SOME OF THE MORE EXTREME CONDITIONS ARE
LIKELY FROM THE WHITE MTNS IN ERN AZ EWD THRU THE CONTINENTAL
DIVIDE REGION INTO THE SACRAMENTOS IN SCNTRL NM. IN ADDITION...POOR
RH RECOVERY IS EXPECTED AND RECENT FIRE DANGER ADJECTIVE RATINGS
ACROSS MOST OF NM INDICATE VERY HIGH TO EXTREME FIRE DANGER
READINGS.
..NADEN.. 05/02/03
SPC FIRE WEATHER OUTLOOKS ARE AVAILABLE AT WWW.SPC.NOAA.GOV/FIRE
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