Wind Advisory 5, NWS Missoula, MT

970 
WWUS75 KMSO 132150
NPWMSO

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE MISSOULA MT
350 PM MDT MON MAY 13 2013

...WINDS AND WAVE HEIGHTS INCREASING THIS AFTERNOON...

IDZ010-MTZ007-140300-
/O.CON.KMSO.WI.Y.0005.000000T0000Z-130514T0300Z/
EASTERN LEMHI COUNTY-BUTTE/BLACKFOOT REGION-
350 PM MDT MON MAY 13 2013

...WIND ADVISORY REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING...

A WIND ADVISORY REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING. 

* IMPACTS/TIMING: DANGEROUS CROSS WINDS ON IDAHO STATE ROUTE 28 
  FROM GILMORE SUMMIT TO LEADORE AS WELL AS I-90 FROM ROCKER TO 
  BUTTE TO GARRISON JUNCTION. THIS INCLUDES THE DEERLODGE AND 
  ANACONDA AREAS. LOCAL BLOWING DUST IS ALSO POSSIBLE. 

* WINDS: SOUTHWEST WINDS 25 TO 40 MPH WITH HIGHER GUSTS.

* LOCATIONS IMPACTED INCLUDE...BANNOCK PASS...HIGHWAY 28 TENDOY 
  TO LONE PINE...HIGHWAY 93 LOST TRAIL PASS TO GIBBONSVILLE...
  LEMHI PASS...SALMON...BUTTE...GEORGETOWN LAKE...HIGHWAY 12 
  GARRISON TO ELLISTON...MACDONALD PASS

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.

&&

$$

MTZ003-140300-
/O.CON.KMSO.LW.Y.0004.000000T0000Z-130514T0300Z/
FLATHEAD/MISSION VALLEYS-
350 PM MDT MON MAY 13 2013

...LAKE WIND ADVISORY REMAINS IN EFFECT UNTIL 9 PM MDT THIS
EVENING...

A LAKE WIND ADVISORY REMAINS IN EFFECT UNTIL 9 PM MDT THIS
EVENING. 

* IMPACTS/TIMING: WINDS WILL INCREASE INTO THIS EVENING AND BE
  QUITE GUSTY NEAR ANY EVENING SHOWERS. WAVE HEIGHTS WILL
  INCREASE DURING THIS TIME...WITH EXCESSIVE CHOP IMPACTING
  WATERCRAFT.

* WINDS: SOUTHWEST WINDS INCREASING TO 15 TO 25 MPH...GUSTING TO
  35 MPH THROUGH THIS EVENING. 

* WAVE HEIGHTS: WAVE HEIGHTS UP TO 4 FEET.

* LOCATIONS IMPACTED INCLUDE...FLATHEAD LAKE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A LAKE WIND ADVISORY INDICATES THAT WINDS WILL CAUSE ROUGH CHOP
ON THE LAKE. SMALL BOATS WILL BE ESPECIALLY PRONE TO CAPSIZING.

NOTE...THE EXPERIMENTAL WAVE HEIGHT FORECASTS ARE REPRESENTATIVE
OF THE MID LAKE WATERS AND DOWNWIND SHORES. WAVE HEIGHTS MAY BE
SIGNIFICANTLY LESS ON UPWIND SHORES.

&&

$$

542 
WWUS75 KMSO 140250
NPWMSO

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE MISSOULA MT
850 PM MDT MON MAY 13 2013

IDZ010-MTZ007-140400-
/O.EXP.KMSO.WI.Y.0005.000000T0000Z-130514T0300Z/
EASTERN LEMHI COUNTY-BUTTE/BLACKFOOT REGION-
850 PM MDT MON MAY 13 2013

...WIND ADVISORY WILL EXPIRE AT 9 PM MDT THIS EVENING...

THE WIND ADVISORY WILL EXPIRE AT 9 PM MDT THIS EVENING. 

THE COLD FRONT HAS PASSED THROUGH THE REGION AND WINDS WILL
CONTINUE TO DECLINE THROUGH THE EVENING.

$$

MTZ003-140400-
/O.EXP.KMSO.LW.Y.0004.000000T0000Z-130514T0300Z/
FLATHEAD/MISSION VALLEYS-
850 PM MDT MON MAY 13 2013

...LAKE WIND ADVISORY WILL EXPIRE AT 9 PM MDT THIS EVENING...

THE LAKE WIND ADVISORY WILL EXPIRE AT 9 PM MDT THIS EVENING. 

THE COLD FRONT HAS PASSED THROUGH THE REGION AND WINDS WILL
CONTINUE TO DECLINE THROUGH THE EVENING.

$$

Area Forecast Discussion
National Weather Service Missoula MT
436 AM MDT Mon May 13 2013

...POSSIBLE SEVERE THUNDERSTORMS THIS AFTERNOON...
...STRONG AND GUSTY WINDS PRESENT TODAY AS WELL...

.DISCUSSION...

A powerful Pacific jet stream will move over the Northern Rockies
today, contributing to the threat of severe thunderstorms, as well
as strong winds.

IMPACT #1: Thunderstorms will develop during early afternoon over
portions of north central Idaho and later move across west central
and southwest Montana. Considering a strong unidirectional wind
profile and atmospheric moisture approaching 200 percent of
normal, damaging winds and sudden bursts of rain are the main
threat with storms today. Small hail may accompany the wind and
rain as well.

IMPACT #2: Winds will be a bit strong, gusting over 35 mph away
from thunderstorms. The strongest daytime winds will occur over
Lemhi County and across southwest Montana.

IMPACT #3: Wind gusts to 35 mph over the Flathead Lake this
afternoon through this evening will create choppy water
conditions and increase wave heights. Small watercraft will have
difficulty navigating in open water during this time.

IMPACT #4: Considering the lack of cooling experienced Sunday
night through this morning, melt of area snowpack is reaching
maximum potential. Some river gages indicate a precipitous rise in
water levels, with some flood highlights being continued and
others expanded through Tuesday. Water levels should retreat from
bankfull or flooding conditions as the temperatures cool on Tuesday.

In the longer term of the forecast (Wednesday night through next
Monday) models continue to show a broad area of low pressure
developing over the Northwestern United States (including Montana
and Idaho). Although many questions remain regarding the specifics of
this pattern change, confidence in cooler, showery conditions is
increasing. Beyond the weekend, models are showing a brief ridge
building over the area which should warm temperatures back above
normal. However, this warmth appears to be short-lived as yet
another strong closed low pressure system is forecast to come
inland by the longer term models. The roller coaster known as
Spring in Montana continues.

&&

.AVIATION...Clouds will increase once again over the Northern
Rockies this morning and cloud bases will lower through this
afternoon and evening. A powerful Pacific storm system will be
responsible for this change, as well as increase in winds at area
terminals. Winds will gust between 25 and 35 kts at most area
terminals this afternoon through this evening. Thunderstorms are
probable to impact flight plans at KMSO, KBTM, and KSMN 13/2100Z
through 14/0300Z. Any thunderstorm approaching a terminal may
produce brief gusts to 40 kts. Otherwise, occasional terrain
obscurations due to developing showers will be the main flight
impact through this evening. Flying conditions will slowly improve
this evening through Tuesday morning.

&&

.MSO WATCHES/WARNINGS/ADVISORIES...
MT...LAKE WIND ADVISORY from Noon today to 9 PM MDT this evening
     Flathead/Mission Valleys.

ID...None.
&&

Zumpfe/Dickerson

Follow us on Facebook and Twitter!
https://www.facebook.com/US.NationalWeatherService.Missoula.gov
https://www.twitter.com/NWSMissoula

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE MISSOULA MT
453 AM MDT MON MAY 13 2013

IDZ005>008-132300-
NORTHERN CLEARWATER MOUNTAINS-SOUTHERN CLEARWATER MOUNTAINS-
OROFINO/GRANGEVILLE REGION-LOWER HELLS CANYON/SALMON RIVER REGION-
353 AM PDT MON MAY 13 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL
IDAHO.

.DAY ONE...TODAY AND TONIGHT

A STRONG COLD FRONT WILL MOVE ACROSS NORTH-CENTRAL IDAHO TODAY.
THUNDERSTORMS AHEAD OF AND ALONG A COLD FRONT WILL BRING AN
INCREASED THREAT FOR LIGHTNING...HEAVY DOWNPOURS AND STRONG GUSTY
WINDS. INTENSE RAINFALL WITH A FEW OF THESE THUNDERSTORMS MAY
CAUSE LOCALIZED FLOOD CONCERNS...ESPECIALLY IN AREAS NEAR RECENT
WILDFIRE BURN SCARS.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

THE POTENTIAL FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

IDZ009-010-MTZ004>007-043-132300-
WESTERN LEMHI COUNTY-EASTERN LEMHI COUNTY-LOWER CLARK FORK REGION-
MISSOULA/BITTERROOT VALLEYS-BITTERROOT/SAPPHIRE MOUNTAINS-
BUTTE/BLACKFOOT REGION-POTOMAC/SEELEY LAKE REGION-
453 AM MDT MON MAY 13 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL
IDAHO AND WEST CENTRAL MONTANA.

.DAY ONE...TODAY AND TONIGHT

THUNDERSTORMS ARE EXPECTED TO DEVELOP OVER NORTH-CENTRAL IDAHO AND
WESTERN MONTANA TODAY. SOME OF THE STORMS COULD BECOME SEVERE AND
CAPABLE OF PRODUCING HAIL...DAMAGING WINDS AND FREQUENT LIGHTNING.
INTENSE RAINFALL WITH A FEW OF THESE THUNDERSTORMS MAY CAUSE
LOCALIZED FLOOD CONCERNS.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

THE POTENTIAL FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

MTZ003-132300-
FLATHEAD/MISSION VALLEYS-
453 AM MDT MON MAY 13 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHWEST
MONTANA.

FOR THE LATEST INFORMATION ON WATCHES...WARNINGS AND ADVISORIES...GO
TO WEATHER.GOV/MISSOULA.

.DAY ONE...TODAY AND TONIGHT

THUNDERSTORMS ARE EXPECTED TO DEVELOP OVER WESTERN MONTANA TODAY.
SOME OF THE STORMS COULD BECOME SEVERE AND CAPABLE OF PRODUCING
HAIL...DAMAGING WINDS AND FREQUENT LIGHTNING. INTENSE RAINFALL
WITH A FEW OF THESE THUNDERSTORMS MAY CAUSE LOCALIZED FLOODING
CONCERNS.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

THE POTENTIAL FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.