Wind Advisory 12, NWS Missoula, MT

000 
WWUS75 KMSO 051803 CCA
NPWMSO

URGENT - WEATHER MESSAGE...CORRECTED
NATIONAL WEATHER SERVICE MISSOULA MT
1203 PM MDT TUE MAY 5 2009

...GUSTY WINDS TO IMPACT NORTHWEST MONTANA THIS AFTERNOON...

.AN APPROACHING WEATHER SYSTEM COMBINED WITH A STRONG UPPER LEVEL
JET WILL CAUSE WINDS TO INCREASE THIS AFTERNOON. WEST TO SOUTHWEST
WINDS OF 20 TO 30 MPH WITH GUSTS TO 40 MPH ARE EXPECTED THROUGH
LATE THIS AFTERNOON. HIGHER ELEVATIONS COULD SEE GUSTS AS HIGH AS 50
MPH...PARTICULARLY ALONG THE CONTINENTAL DIVIDE. THESE CONDITIONS
ARE EXPECTED TO GRADUALLY DECREASE THIS EVENING WITH SOME
LINGERING GUSTS POSSIBLE AFTER SUNDOWN.

MTZ001>004-060000-
/O.NEW.KMSO.WI.Y.0012.090505T1803Z-090506T0000Z/
KOOTENAI/CABINET REGION-WEST GLACIER REGION-
FLATHEAD/MISSION VALLEYS-LOWER CLARK FORK REGION-
1203 PM MDT TUE MAY 5 2009

...WIND ADVISORY IN EFFECT UNTIL 6 PM MDT THIS EVENING...

THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A WIND
ADVISORY...WHICH IS IN EFFECT UNTIL 6 PM MDT THIS EVENING. 

SOUTHWEST WINDS OF 25 TO 35 MPH WITH GUSTS OVER 40 MPH ARE
EXPECTED AFTER NOON TODAY. MAIN AREAS IMPACTED ARE THE KOOTENAI
CABINET REGION...WEST GLACIER PARK...FLATHEAD LAKE AND FLATHEAD
VALLEY AND LOCATIONS NORTH OF PLAINS ALONG THE INTERSTATE 90
CORRIDOR.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WIND ADVISORY MEANS THAT WINDS OF 35 MPH ARE EXPECTED. WINDS
THIS STRONG CAN MAKE DRIVING DIFFICULT...ESPECIALLY FOR HIGH
PROFILE VEHICLES. USE EXTRA CAUTION.

&&

$$

000 
WWUS75 KMSO 052345
NPWMSO

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE MISSOULA MT
545 PM MDT TUE MAY 5 2009


MTZ001>004-060045-
/O.EXP.KMSO.WI.Y.0012.000000T0000Z-090506T0000Z/
KOOTENAI/CABINET REGION-WEST GLACIER REGION-
FLATHEAD/MISSION VALLEYS-LOWER CLARK FORK REGION-
545 PM MDT TUE MAY 5 2009

...WIND ADVISORY WILL EXPIRE AT 6 PM MDT THIS EVENING...

THE WIND ADVISORY WILL EXPIRE AT 6 PM MDT THIS EVENING. 

THE PRESSURE GRADIENT THAT IS OVER THE AREA IS SHOWING SIGNS OF
DECREASING. GUSTY WINDS OF 25 TO 35 MPH WILL CONTINUE THROUGH
EARLY THIS EVENING BEFORE DECREASING BY MIDNIGHT AFTER THE ATMOSPHERE
STABILIZES. THE HIGH TERRAIN WILL CONTINUE TO SEE STRONG AND
GUSTY WINDS THROUGH TONIGHT.

$$

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MISSOULA MT
453 AM MDT TUE MAY 5 2009

.DISCUSSION...SHOWERS CONTINUE TO MOVE OVER WESTERN MONTANA AND
CENTRAL IDAHO THIS MORNING BEHIND A WARM FRONT THAT HAS ADVANCED
THROUGH THE REGION. SATELLITE IS SHOWING DRIER AIR MOVING IN
ALOFT FROM THE SOUTHWEST HOWEVER SURFACE OBSERVATIONS UPSTREAM ARE
STILL REPORTING PRECIPITATION AND LOW LEVEL CLOUD COVER. ANOTHER
PACIFIC TROUGH WILL MOVE THROUGH THE NORTHERN ROCKIES TODAY
PRODUCING MORE SHOWERS. A COLD FRONT ACCOMPANYING THIS SYSTEM WILL
BE THE MAIN FOCAL POINT FOR HEAVIER RAINFALL AS IT MOVES THROUGH
THE INTERMOUNTAIN WEST FROM NORTHWEST TO SOUTHEAST. IT WILL NOT
BRING MUCH COOL AIR BUT THE INCREASED CLOUD COVER AND
PRECIPITATION WILL LIKELY KEEP TEMPERATURES FROM WARMING UP MUCH
DURING THE AFTERNOON HOURS. THE ACTIVE FLOW CONTINUES ON WEDNESDAY
WITH SCATTERED SHOWERS POSSIBLE THROUGH THE DAY AND MORE ORGANIZED
PRECIPITATION WEDNESDAY NIGHT AHEAD OF ANOTHER PACIFIC SYSTEM.

THURSDAY THROUGH TUESDAY...A LOW AMPLITUDE WEST TO EAST FLOW ALOFT
CONTINUES TO BE DEPICTED BY GUIDANCE THROUGHOUT THE EXTENDED
FORECAST PERIODS. AS EACH PERIOD BECOMES CLOSER TO FORECAST HOUR
ZERO...SMALL DISTURBED FEATURES BECOME INCREASINGLY EVIDENT WITHIN
THE MEAN FLOW. CURRENTLY...WEAK STORM SYSTEM FEATURES ARE MOST
PRONOUNCED DURING THURSDAY...AND THEN AGAIN LATE MONDAY. BESIDES
THESE TWO PERIODS...THE WEST TO EAST FLOW REGIME WILL MAINTAIN A
SLIGHT THREAT FOR PRECIPITATION EACH DAY OF THE EXTENDED FORECAST.
ON THURSDAY...PRECIPITATION PROBABILITY WILL BE DEPENDENT ON THE
POSITION OF THE PACIFIC JET STREAM...DEPICTED EXITING THE REGION
TO THE SOUTHEAST BY THURSDAY NIGHT. LATE MONDAY ONWARD...A MORE
IMPRESSIVE PACIFIC STORM SYSTEM IS DEPICTED TO BE IN THE
REGION...HOWEVER THE VARIOUS GUIDANCES AVAILABLE DO NOT CURRENTLY
AGREE WHEN THE STORM SYSTEM WILL MOVE THROUGH THE NORTHERN US
ROCKIES. AS A RESULT OF TIMING UNCERTAINTY FOR MONDAY
ONWARD...FORECAST PRECIPITATION CHANCES REMAIN FAIRLY CLOSE TO
CLIMATOLOGY. DAY TO DAY TEMPERATURES APPEAR TO BE AFFECTED VERY
LITTLE WITH THE WEST TO EAST FLOW...HOWEVER THE MONDAY SYSTEM MAY
HAVE A COLD CORE OF AIR THAT COULD COOL THE REGION FOR A TIME.
OVERALL...DETAILS OF THE MONDAY STORM SYSTEM ARE QUITE UNCLEAR AT
THIS TIME.

&&

.AVIATION...A PACIFIC SYSTEM MOVING THROUGH THE NORTHWEST UNITED
STATES WILL BRING PRECIPITATION THROUGH THE DAY. CLOUD DECKS WILL
REMAIN LOW THROUGH THE DAY OBSCURING TERRAIN. HEAVIER RAINFALL
WILL BE LIKELY ALONG A COLD FRONT PASSING THROUGH THE REGION FROM
NORTHWEST TO SOUTHEAST THROUGH THE DAY. THIS WILL REDUCE
VISIBILITY AND LOWER CEILINGS AS IT PASSES.

&&

.MSO WATCHES/WARNINGS/ADVISORIES...
MT...NONE.
ID...NONE.
&&

SHORT TERM...LOEFFELBEIN
LONG TERM....ZUMPFE
AVIATION...LOEFFELBEIN