Storm Prediction Center
Day 1 and Day 2 Fire Weather Outlooks
ZCZC SPCFWDDY1 ALL
FNUS21 KWNS 250852
DAY 1 FIRE WEATHER OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0352 AM CDT THU SEP 25 2003
VALID 251200Z - 261200Z
...CRITICAL FIRE WEATHER AREA FOR SOUTHEAST MONTANA...
...CRITICAL FIRE WEATHER AREA FOR SOUTHEAST WYOMING...
...SYNOPSIS...
AN UPPER LEVEL TROUGH COVERS MUCH OF THE CENTRAL AND EASTERN UNITED
STATES...WITH STRONG NORTHWEST FLOW OVER THE NORTHERN ROCKIES.
ANOTHER UPPER LEVEL SHORTWAVE MOVES OVER THE NORTHEAST TODAY...
PUSHING A COLD FRONT THROUGH NEW ENGLAND AND INTO THE MID ATLANTIC
REGION. ELSEWHERE...AN UPPER RIDGE IS LOCATED ALONG THE WEST COAST
KEEPING DRY AND WARM CONDITIONS ALONG THE WEST COAST AND
INTERMOUNTAIN WEST. SCATTERED THUNDERSTORMS ARE EXPECTED OVER PARTS
OF THE SOUTHWEST AND ALONG THE GULF COAST.
...CRITICAL FIRE WEATHER AREA 1 - SERN MT...
PRIMARY CONDITIONS: WINDY WITH LOW RELATIVE HUMIDITY
WINDS AT THE SURFACE AND ALOFT INCREASE TODAY AS A STRONG UPPER JET
MOVES FROM BRITISH COLUMBIA TO NERN MT. AT THE SURFACE...A LEE
TROUGH OVER CENTRAL MT EARLY THIS MORNING REACHES THE WRN DAKOTAS BY
EARLY THIS AFTERNOON. STRONG WLY SURFACE WINDS DEVELOP BEHIND THE
TROUGH...REACHING SUSTAINED VALUES AT OR ABOVE 20 MPH THIS
AFTERNOON...WITH GUSTS EXCEEDING 30 MPH. SURFACE DEWPOINTS IN THE
WAKE OF THE TROUGH RISE INTO THE LOWER 30S...BUT WARM AFTERNOON
TEMPERATURES RESULT IN MINIMUM RELATIVE HUMIDITY VALUES BETWEEN 15
AND 20 PERCENT. BECAUSE THE PREDICTED FIRE DANGER CLASS IS VERY
HIGH OVER SERN MT...A CRITICAL FIRE WEATHER AREA IS WARRANTED.
WINDS DECREASE AND RELATIVE HUMIDITY RECOVERS RAPIDLY AFTER SUNSET.
...CRITICAL FIRE WEATHER AREA 2 - SERN WY...
PRIMARY CONDITIONS: WINDY WITH LOW RELATIVE HUMIDITY
THE FIRE WEATHER SITUATION OVER SERN WY IS SIMILAR TO SERN MT.
SURFACE WINDS WILL INCREASE TO AROUND 20 MPH THIS AFTERNOON
FOLLOWING THE PASSAGE OF THE LEE TROUGH. MINIMUM RH VALUES IN SERN
WY ARE EXPECTED TO FALL INTO THE MID TEENS...WITH A VERY HIGH
PREDICTED FIRE DANGER CLASS.
..BRIGHT.. 09/25/2003
...PLEASE SEE WWW.SPC.NOAA.GOV/FIRE FOR GRAPHIC PRODUCT...
ZCZC SPCFWDDY2 ALL
FNUS22 KWNS 250938
DAY 2 FIRE WEATHER OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0438 AM CDT THU SEP 25 2003
VALID 261200Z - 271200Z
...NO CRITICAL AREAS...
...SYNOPSIS...
STRONG UPPER HIGH PRESSURE BUILDS OVER THE WRN UNITED STATES...WITH
A DEEP UPPER TROUGH OVER THE ERN TWO-THIRDS OF THE NATION. A
VIGOROUS SHORTWAVE MOVES FROM SASKATCHEWAN TO NRN IL...PUSHING A
COLD FRONT INTO THE OHIO VALLEY AND SRN PLAINS BY SATURDAY MORNING.
THE WEST WILL REMAIN DRY AND WARM...WITH CLOUDS AND PRECIPITATION
OVER MUCH OF THE MIDWEST AND EAST.
...ERN MT...ERN WY...WRN DAKOTAS...
VERY STRONG NWLY FLOW CONTINUES OVER THE NRN PLAINS...WITH NWLY
POSTFRONTAL SURFACE WINDS AROUND 20 TO 30 MPH DEVELOPING FRIDAY
AFTERNOON. THE AIRMASS IS EXPECTED TO BE MARGINALLY DRY WITH
SURFACE DEW POINTS AROUND 35 TO 40 DEGREES AND MINIMUM RELATIVE
HUMIDITIES BETWEEN 25 AND 35 PERCENT. THE PREDICTED FIRE DANGER
CLASS IS MOSTLY IN THE HIGH CATEGORY OVER THIS AREA. CONDITIONS
THEREFORE APPROACH CRITICAL FIRE WEATHER THRESHOLDS FRIDAY
AFTERNOON...WITH MOISTURE AND ANTECEDENT CONDITIONS THE LIMITING
FACTORS.
..BRIGHT.. 09/25/2003
...PLEASE SEE WWW.SPC.NOAA.GOV/FIRE FOR GRAPHIC PRODUCT...
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