High Wind Watch 1, NWS Missoula, MT

780 
WWUS75 KMSO 161045
NPWMSO

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE MISSOULA MT
345 AM MST WED NOV 16 2011

IDZ007-161845-
/O.UPG.KMSO.HW.A.0001.111117T0000Z-111117T1500Z/
/O.NEW.KMSO.HW.W.0003.111117T0000Z-111117T1500Z/
OROFINO/GRANGEVILLE REGION-
245 AM PST WED NOV 16 2011

...HIGH WIND WARNING IN EFFECT FROM 4 PM THIS AFTERNOON TO 7 AM
PST THURSDAY FOR THE CAMAS PRAIRIE...

THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A HIGH WIND
WARNING...WHICH IS IN EFFECT FROM 4 PM THIS AFTERNOON TO 7 AM PST
THURSDAY FOR THE CAMAS PRAIRIE. THE HIGH WIND WATCH IS NO LONGER IN
EFFECT.

* IMPACTS/TIMING: STRONG SOUTH WINDS WILL DEVELOP ACROSS THE CAMAS
  PRAIRIE LATE THIS AFTERNOON AND CONTINUE THROUGH EARLY THURSDAY
  MORNING.

* WINDS: SOUTHERLY WINDS 30 TO 40 MPH WITH GUSTS NEAR 60 MPH EXPECTED.

* LOCATIONS IMPACTED INCLUDE...CAMAS PRAIRIE...GRANGEVILLE AND 
  VICINITY...GREER GRADE

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A HIGH WIND WARNING MEANS A HAZARDOUS HIGH WIND EVENT IS EXPECTED.
SUSTAINED WIND SPEEDS OF AT LEAST 40 MPH OR GUSTS OF 50 MPH OR
MORE CAN LEAD TO PROPERTY DAMAGE.

&&

$$

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MISSOULA MT
1054 AM MST TUE NOV 15 2011

.UPDATE...HAVE UPDATED TO END THE ADVISORIES FOR THIS MORNING.
VERY LIGHT SNOW CONTINUES BUT SIGNIFICANT ACCUMULATIONS ARE NOT
EXPECTED THROUGH THIS AFTERNOON.

&&

.AVIATION...SNOW SHOWERS HAVE RE-DEVELOPED ACROSS NORTHWEST
MONTANA. OCCASIONAL LOWERED CEILING AND VISIBILITY WILL RESULT
ALONG WITH AREAS OF MOUNTAIN OBSCURATION. A RIDGE OF HIGH PRESSURE WILL
BUILD OVER NORTH CENTRAL IDAHO AND WESTERN MONTANA TONIGHT...BRINGING A
BRIEF REPRIEVE IN PRECIPITATION. EXPECT RISING CEILINGS AND A
DECREASE IN WINDS AS A RESULT.

&&

.PREV DISCUSSION... /ISSUED 408 AM MST TUE NOV 15 2011/

..A SLICK MORNING COMMUTE FOR MANY RESIDENTS OF NORTH CENTRAL
IDAHO AND WEST CENTRAL AND SOUTHWEST MONTANA THIS MORNING...

DISCUSSION...
IMPACTS TODAY...SLICK ROADWAYS FROM OVERNIGHT SNOW SHOWERS AND
FREEZING MORNING TEMPERATURES. INCREASED SNOW SHOWERS ACROSS THE
REGION BY AFTERNOON.

SNOW SHOWERS ARE CONFINED TO HIGHER TERRAIN AND A FEW LINGERING
BANDS THROUGH THE BITTERROOT/SAPPHIRE MOUNTAINS...THE MISSION
RANGE AND BOB MARSHAL WILDERNESS THIS MORNING. MOST OF THE VALLEYS
WILL ONLY EXPERIENCE LIGHT SNOW OR FLURRIES THROUGH THE
MORNING...BUT LAST NIGHTS SNOW AND TEMPERATURES PLUMMETING BELOW
FREEZING BEHIND A COLD FRONT HAS RESULTED IN VERY SLICK ROADWAYS
THIS MORNING. THEREFORE CONTINUED WINTER WEATHER ADVISORIES FROM
THE MISSOULA/BITTERROOT VALLEYS AND SOUTHWEST MONTANA FOR
HAZARDOUS ROADS. SNOW IS EXPECTED TO CONTINUE TO IMPACT SEELEY
LAKE THROUGH CONDON THIS MORNING...SO ALSO CONTINUED THAT ADVISORY
FOR ADDITIONAL SNOW ACCUMULATIONS. ANOTHER UPPER LEVEL WAVE WILL
MOVE THROUGH THE UPPER LEVEL FLOW INCREASING SNOW SHOWER COVERAGE
AGAIN THIS AFTERNOON...BUT THE BANDING POTENTIAL LOOKS MUCH LESS.
THEREFORE JUST EXPECT SCATTERED SNOW SHOWERS THROUGH EARLY
EVENING.

IMPACT FOR MID/END OF THE WEEK...INCREASING MOISTURE/WINDS AHEAD
OF PACIFIC TROUGH...FOLLOWED BY FAST MOVING COLD FRONT BY LATE THURSDAY.

AFTER A BRIEF DRY PERIOD TONIGHT...A WARM FRONT WILL SPREAD
MOISTURE AND INCREASE SOUTHWEST WINDS ACROSS THE REGION WEDNESDAY
NIGHT INTO MID DAY THURSDAY. THIS WILL BRING A RETURN OF RAIN TO
MANY VALLEYS WITH SNOW AT THE HIGHER ELEVATIONS. A QUICK MOVING
COLD FRONT THURSDAY AFTERNOON AND EVENING WILL QUICKLY CHANGE THE
RAIN IN THE VALLEYS BACK TO SNOW. AT THIS TIME...THE FRONT LOOKS
TO CROSS WESTERN MONTANA BETWEEN 3 PM AND 7 PM WITH A BURST OF
SNOW AND WINDS ALONG THE FRONT. THIS COULD IMPACT THE THURSDAY
EVENING COMMUTE WITH MIXED PRECIPITATION AND FALLING TEMPERATURES.

IMPACTS FOR FRIDAY THROUGH THE WEEKEND...ARCTIC AIR BEING PULLED
WEST OF THE DIVIDE AND MOISTURE FROM PACIFIC TROUGH MOVING OVER THIS
COLD AIR.

MODELS ARE COMING INTO GOOD AGREEMENT THAT THE FIRST ARCTIC
INTRUSION OF THE 2011-2012 WINTER SEASON WILL BE ON
FRIDAY...LASTING THROUGH THE WEEKEND. WITH THE SURFACE FRONT
PUSHING THROUGH FRIDAY AND MOISTURE STREAMING INTO THE REGION ON
UPPER LEVEL SOUTHWEST FLOW...A COLD BLUSTERY FRIDAY
AFTERNOON/EVENING SHOULD BE ANTICIPATED WITH TRAVEL IMPACTS OVER
MOUNTAIN PASSES AND MANY VALLEYS. STRONG BLUSTERY WINDS AND
BLOWING SNOW WILL LAST THROUGH MID MORNING SATURDAY. THE FRONT IS
EXPECTED TO STALL FROM LOLO PASS THROUGH SOUTHWEST MONTANA BY
EARLY SATURDAY AND THE PRESSURE GRADIENT WILL WEAKEN...LESSENING
THE WINDS. MOISTURE WILL REMAIN OVER THE REGION SO LIGHT SNOW
SHOWERS ARE EXPECTED THROUGH SATURDAY AND SUNDAY. TEMPERATURES
THROUGH THE WEEKEND WILL BE QUITE COLD WITH HIGHS ONLY IN THE
TEENS AND LOW 20S WITH LOWS IN THE SINGLE DIGITS.

&&

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

SHORT TERM...GIBSON
LONG TERM....MEAD
AVIATION...MEAD