National Weather Service Raw Text Product

000 
FNUS21 KWNS 270837
STORM PREDICTION CENTER...NWS/NCEP...NORMAN OK
400 AM CDT SUN AUG 27 2000
  
DAY 1 FIRE WEATHER OUTLOOK...REF AWIPS GRAPHIC PMWE98 KWNS
 
VALID 271200-281200
  
...EXTREMELY CRITICAL FIRE WEATHER AREA 1 - (ID / MT / WY /WRN
SD)...
    
PRIMARY CONDITIONS: STRONG WINDS / LOW RH VALUES / FRONTAL BOUNDARY
/ WARM-HOT SURFACE TEMPERATURES

VERY WINDY CONDITIONS WILL BE WIDESPREAD TODAY THROUGH MONDAY MRNG
IN THESE AREAS AS THE STRONG MID-UPPER LEVEL TROUGH SWINGS
SHORTWAVE ENERGY THROUGH THE NRN ROCKIES REGION. THE MAIN BAND OF
STRONGEST WINDS WILL GENERALLY SHIFT FROM NORTH TO SOUTH OVER THE
REGION FROM MIDDAY TODAY INTO EARLY MONDAY MRNG. BY 28/00Z THE
STRONGEST WINDS ARE EXPECTED FROM CNTRL ID INTO SWRN MT SPREADING
NEWD THROUGH ALL OF CNTRL MT. EXPECT SUSTAINED WLY WINDS FROM 15-30
MPH WITH HIGHER GUSTS ACROSS THESE AREAS GRADUALLY SHIFTING TO THE
EAST AND SOUTH INTO NRN WY AND ERN MT BETWEEN 28/06Z AND 28/12Z. BY
28/06Z...WINDS WILL SHIFT TO THE NW OVER MUCH OF WRN/CNTRL MT WITH
W-SW WINDS FROM SERN ID THROUGH NCNTRL WY. RH VALUES WILL AGAIN BE
QUITE LOW WITH LATE AFTERNOON READINGS RANGING GENERALLY BETWEEN
10-20 PERCENT. A COLD/STATIONARY FRONT WILL MOVE VERY LITTLE WITH
TEMPERATURES FROM 70-85 DEGREES NORTH OF THE BOUNDARY TO 75-90
DEGREES SOUTH OF THE STATIONARY FRONT. WITH THE CONTINUATION OF THE
STRONG WINDS OVER MOST AREAS OVERNIGHT TONIGHT...RH RECOVERY OVER
THE WHOLE REGION WILL BE LOW LIKELY CAUSING ADDITIONAL PROBLEMS TO
FIRE FIGHTING EFFORTS. 


...EXTREMELY CRITICAL FIRE WEATHER AREA 2 - (MT / WY / NERN ID)... 
 
PRIMARY CONDITIONS: DRY THUNDERSTORMS / STRONG LAPSE RATES / DRY
LOWER LEVELS / WARM-HOT SURFACE TEMPERATURES / FRONTAL BOUNDARY 

SCATTERED DRY THUNDERSTORMS SHOULD BE EXPECTED OVER AREAS FROM ERN
ID EWD INTO SRN MT AND NRN WY AS STRONG SHORTWAVE ENERGY WILL SURGE
THROUGH THE REGION AFTER 28/00Z. VERY STEEP MID-LEVEL LAPSE RATES
AND STRONG SURFACE HEATING WILL COMBINE WITH POTENT SHORTWAVE
TROUGH ENERGY...DRY LOWER LEVELS...AND A FRONTAL BOUNDARY IN THE
VICINITY TO YIELD VERY STRONG VERTICAL MOTION TRIGGERING AREAS OF
CONVECTION. MODELS INDICATE THAT MID-LEVEL RH VALUES WILL HOVER
AROUND 45-60 PERCENT WHILE LOWER LEVEL RH READINGS WILL LINGER
BETWEEN 15-30 PERCENT. 
  
...SYNOPSIS... 

THE STRONG MID-UPPER LEVEL TROUGH MOVING THROUGH WRN CANADA/PAC NW
ATTM WILL CONTINUE TO BE THE PRIMARY WX FEATURE AS IT WILL SHOVE
THE STRONG UPPER RIDGE OVER THE SRN PLAINS/SWRN U.S. EWD TODAY. THE
MODELS INDICATE THAT THE BULK OF THE ENERGY WITH THE STRONG TROUGH
WILL SURGE FROM WRN B.C. SEWD...THROUGH WA/NRN ID AROUND
28/00Z...NWRN MT NEAR 28/06Z...THEN ENEWD THROUGH NCNTRL MT/NERN MT
AROUND 28/12Z BEFORE HEADING EWD INTO ND AND SRN MANITOBA. AT
28/06Z THE 250 MB WIND FORECASTS REVEAL A NEAR 95 KT JET STREAK
PROGRESSING FROM NCTRL MT INTO EXTREME NERN MT. THESE STRONG UPPER
LEVEL WINDS WILL MIX DOWN TO THE SURFACE OVER MANY AREAS OF THE NRN
ROCKIES TODAY AND ESPECIALLY LATER TONIGHT INTO EARLY MONDAY MRNG
WHEN THE MAJORITY OF THE MID-UPPER LEVEL ENERGY WILL SURGE THROUGH
THE REGION. 

A COLD/STATIONARY BOUNDARY WILL CONTINUE TO LINGER IN THE NRN
ROCKIES REGION TODAY AND IS FORECAST TO STRETCH FROM NRN ND WSWWD
THROUGH SERN/SRN MT...CNTRL ID...INTO SERN OR BY 28/00Z. RH VALUES
WILL AGAIN BE LOW THROUGHOUT THE WRN STATES. THE EXCEPTION WILL BE
OVER PARTS OF AZ/UT/AND CO WITH THE MONSOONAL FLOW AND NORTH OF THE
FRONTAL BOUNDARY OVER THE PAC NW INTO NWRN MT. SCATTERED AREAS OF
DRY THUNDERSTORMS ARE EXPECTED MAINLY LATER TONIGHT INTO MONDAY
MRNG ACROSS PORTIONS OF NRN WY AND SRN MT AS MID-LEVEL MOISTURE
WILL LIKELY ADVECT NWD JUST AHEAD OF THE STRONG MID-LEVEL ENERGY
FORECAST TO MOVE ACROSS THE NRN ROCKIES.     
  
..NADEN.. 08/27/00
   
DAY1/DAY2 FIRE WEATHER TEXT/GRAPHICS OUTLOOKS ARE AVAILABLE AT
 WWW.SPC.NOAA.GOV/FIRE
  
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