Storm Prediction Center
Day 1 and Day 2 Fire Weather Outlooks
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FNUS21 KWNS 170845
STORM PREDICTION CENTER...NWS/NCEP...NORMAN OK
345 AM CDT SAT MAY 17 2003
DAY 1 FIRE WEATHER OUTLOOK...REF AWIPS GRAPHIC PMWE98 KWNS
VALID 171200-181200
...NO AREAS...
...SYNOPSIS...
A 700MB THERMAL RIDGE ACROSS THE DESERT SW WILL SPREAD EWD ACROSS
THE SRN ROCKIES/SRN HIGH PLAINS AREA THIS PERIOD. THIS FEATURE WILL
BE ASSOCIATED WITH ABOVE NORMAL TEMPERATURES AND VERY LOW MINIMUM
RH VALUES. BETWEEN THIS RIDGE AND A BROAD BAROCLINIC TROUGH ACROSS
THE NWRN CONUS...A SHORT-WAVE TROUGH/MID-LEVEL JET MAX WILL
TRANSLATE NEWD ACROSS THE SRN GREAT BASIN THIS AFTERNOON INTO THIS
EVENING.
...FOUR CORNERS AREA...
BY AFTERNOON...AN AREA OF SWLY WINDS BETWEEN 15-25 MPH WILL DEVELOP
ACROSS CENTRAL/SRN UT...NRN AZ...NWRN NM...AND WRN CO IN RESPONSE
TO INCREASING WINDS ALOFT AND VERTICAL MIXING ASSOCIATED WITH
AFTERNOON HEATING AND STEEPENING LOW-LEVEL LAPSE RATES. WINDS COULD
LOCALLY REACH 30-35 MPH ACROSS SRN UT BENEATH ANTICIPATED CORE OF
STRONGEST UPPER FLOW. A MITIGATING FACTOR IN SEVERITY OF FIRE
WEATHER CONDITIONS WILL BE MID-UPPER LEVEL CLOUDS SPREADING NEWD
TOWARD THE GREAT BASIN AREA EARLY THIS MORNING. NUMERICAL MODELS
ARE CONSISTENT IN SHOWING BROKEN TO OVERCAST CONDITIONS IN
CENTRAL/SRN UT WHICH WILL HOLD TEMPERATURES IN THE MID TO UPPER 70S
AND MINIMUM RH VALUES AROUND 20 PERCENT. THIS WILL PRECLUDE A
CRITICAL FIRE WEATHER AREA. FURTHER SOUTH....MUCH WARMER
TEMPERATURES ARE EXPECTED ACROSS AZ/NM...WITH VERY LOW MINIMUM RH
VALUES OF 8-15 PERCENT. HOWEVER...WINDS WILL GENERALLY BE NEAR OR
BELOW 20 MPH IN THESE AREAS KEEPING FIRE WEATHER THREAT BELOW
CRITICAL LEVELS THIS PERIOD.
..BANACOS.. 05/17/03
SPC FIRE WEATHER OUTLOOKS ARE AVAILABLE AT WWW.SPC.NOAA.GOV/FIRE
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FNUS22 KWNS 170839
STORM PREDICTION CENTER...NWS/NCEP...NORMAN OK
340 AM CDT SAT MAY 17 2003
DAY 2 FIRE WEATHER OUTLOOK...REF AWIPS GRAPHIC PMWI98 KWNS
VALID 181200-191200
...CRITICAL FIRE WEATHER AREA FOR MUCH OF AZ AND NM...
...SYNOPSIS...
DURING THE DAY 2 PERIOD...AN UPPER TROUGH NEAR THE SRN CA COAST AT
18/12Z WILL MOVE INLAND ACROSS THE DESERT SW THROUGH EARLY MONDAY
MORNING. AN ASSOCIATED 500MB JET WITH WINDS OF 45-50KT WILL
TRANSLATE ACROSS SRN CA INTO AZ DURING SUNDAY AFTERNOON.
...CRITICAL FIRE WEATHER AREA 1 - AZ AND NM...
PRIMARY CONDITIONS: MODERATE WINDS / VERY LOW RH VALUES / MODERATE
TO SEVERE DROUGHT CONDITIONS
WLY WINDS OF 15-30 MPH ARE EXPECTED TO DEVELOP BY AFTERNOON ACROSS
MUCH OF AZ/NM. MINIMUM RH VALUES WILL RANGE FROM 5-10 PERCENT
ACROSS SERN AZ AND MUCH OF CENTRAL/SRN NM. ELSEWHERE ACROSS THE
CRITICAL FIRE WEATHER AREA...MINIMUM RH VALUES WILL LIKELY RANGE
FROM 10-15 PERCENT. VERY WARM TO HOT TEMPERATURES...WITH HIGHS IN
THE LOW 90S TO 102 ACROSS SRN NM/SRN AZ...AND IN THE MID 80S TO LOW
90S AT LOW ELEVATIONS ELSEWHERE...WILL CONTRIBUTE TO FIRE WEATHER
THREAT. MODERATE TO SEVERE LONG-TERM DROUGHT CONDITIONS IN ADDITION
TO ANTICIPATED AMBIENT CONDITIONS SHOULD BRING A PERIOD OF CRITICAL
FIRE WEATHER TO AZ/NM DURING MUCH OF SUNDAY AFTERNOON AND EVENING.
LOW-LEVEL STABILIZATION SHOULD BRING A SIGNIFICANT DECREASE IN WIND
AT LOW ELEVATIONS BY LATE EVENING...WITH GRADUAL RH RECOVERY DURING
THE NIGHTTIME HOURS.
..BANACOS.. 05/17/03
SPC FIRE WEATHER OUTLOOKS ARE AVAILABLE AT WWW.SPC.NOAA.GOV/FIRE
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