Special Weather Statement, NWS Missoula, MT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MISSOULA MT
201 PM MDT WED AUG 3 2011

.DISCUSSION...WHILE MOST OF WESTERN MONTANA AND IDAHO REMAIN UNDER
PARTLY SUNNY SKIES...ISOLATED THUNDERSTORMS HAVE DEVELOPED OVER
SOUTHWEST MONTANA AND SOUTH CENTRAL IDAHO (MAINLY LEMHI COUNTY)
AND SHOULD CONTINUE TO DEVELOP THROUGH THE EVENING HOURS. REPORTS
COMING IN FROM THE STORMS HAVE BEEN FAIRLY MINOR...THEREFORE, EXPECT
BRIEF MODERATE TO HEAVY RAIN SHOWERS AND LIGHTNING TO BE THE MAIN
IMPACT FROM THESE STORMS. AN ISOLATED CASE OF PEA SIZED TO HALF
INCH SIZED HAIL MAY RESULT FROM THE STORMS...BUT FOR THE MOST PART
SHOULD REMAIN WELL BELOW SEVERE STATUS.

THE CASE TOMORROW AFTERNOON MAY BE SLIGHTLY DIFFERENT HOWEVER.
WITH SKIES EXPECTED TO CLEAR OVERNIGHT MOSTLY EVERYWHERE ACROSS
THE REGION...CLOUD COVER WILL BEGIN TO INCREASE ONCE AGAIN FROM
SOUTH TO NORTH THROUGH THURSDAY MORNING. ATMOSPHERIC CONDITIONS
WILL DESTABILIZE BY EARLY AFTERNOON...WITH THE THREAT FOR
THUNDERSTORMS TO DEVELOP ACROSS AN AREA FROM THE I-90 CORRIDOR AND
SOUTH THROUGH IDAHO. SOME STORMS MAY PROVE TO BE STRONG DURING
THIS TIME...WITH THE POSSIBILITY OF GUSTY WINDS AND SMALL HAIL
INCREASING THROUGHOUT THE AFTERNOON AND EVENING. THUNDERSTORMS
COULD CONTINUE PAST SUNSET INTO EARLY FRIDAY MORNING.

OVER THE WEEKEND AND INTO NEXT WEEK...THE AREA WILL REMAIN UNDER
SOUTHWEST FLOW. A PERSISTENT TROUGH OVER THE PACIFIC NORTHWEST
WILL FREQUENTLY EJECT MINOR DISTURBANCES INTO THE AREA. AS A
RESULT...DAILY SHOWERS AND THUNDERSTORMS WILL CONTINUE THROUGH THE
WEEKEND...WITH SOME STORMS AND SHOWERS LASTING OVERNIGHT. STILL
CANNOT SEE ANY SIGN OF A SIGNIFICANT CHANGE TO THE WEATHER
PATTERN.

&&

.AVIATION...SHOWERS AND THUNDERSTORMS WILL CONTINUE
THIS AFTERNOON ACROSS SOUTHWEST MONTANA AND CENTRAL
IDAHO...IMPACTING KSMN AND KBTM. THE MAIN THREAT WITH
THUNDERSTORMS WILL BE BRIEF MODERATE TO HEAVY RAIN AND PLENTY OF
LIGHTNING. LOWERED CEILINGS MAY ALSO OBSCURE THE HIGHER TERRAIN
PERIODICALLY AROUND STRONGER SHOWERS. ELSEWHERE EXPECT PLEASANT
AVIATION CONDITIONS TO PERSIST INTO THURSDAY MORNING. AN INCREASED
CHANCE FOR THUNDERSTORM DEVELOPMENT ACROSS THE NORTHERN ROCKIES WILL
EXIST THURSDAY AFTERNOON.

&&

NOTE: FLOOD WATCHES...WARNINGS AND ADVISORIES WILL NOT BE LISTED BELOW.

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

SHORT TERM...ALLEGRETTO
LONG TERM....LEACH
AVIATION...SMITH

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MISSOULA MT
908 PM MDT WED AUG 3 2011

MTZ007-040345-
BUTTE/PINTLAR REGION-
908 PM MDT WED AUG 3 2011

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN POWELL COUNTY UNTIL
945 PM MDT...

AT 901 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM NEAR DEER LODGE...MOVING EAST AT 15 MPH.

WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH THIS STORM...ALONG WITH
HEAVY RAIN AND FREQUENT DANGEROUS LIGHTNING.

LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...DEER LODGE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF THREATENING WEATHER APPROACHES YOUR AREA...GO INDOORS AND STAY
AWAY FROM WINDOWS. IF YOU ARE CAUGHT OUTSIDE...MOVE TO A WELL
PROTECTED AREA.

&&

LAT...LON 4634 11245 4626 11286 4643 11295 4656 11251
      4636 11241
TIME...MOT...LOC 0308Z 251DEG 15KT 4638 11278