High Wind Watch 2, NWS Missoula, MT

000 
WWUS75 KMSO 030956
NPWMSO

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE MISSOULA MT
356 AM MDT SAT OCT 3 2009

.STRONG EAST WINDS ARE EXPECTED TO DEVELOP THIS EVENING AND
LINGER INTO SUNDAY ACROSS NORTHWEST MONTANA. A LOW PRESSURE
SYSTEM IS EXPECTED TO STRENGTHEN IN THE GREAT BASIN CAUSING THE
SURFACE PRESSURE GRADIENT TO TIGHTEN OVER THIS REGION.

MTZ001>003-032100-
/O.CON.KMSO.HW.A.0002.091004T0300Z-091004T1800Z/
KOOTENAI/CABINET REGION-WEST GLACIER REGION-
FLATHEAD/MISSION VALLEYS-
356 AM MDT SAT OCT 3 2009

...HIGH WIND WATCH REMAINS IN EFFECT FROM THIS EVENING THROUGH
SUNDAY MORNING...

A HIGH WIND WATCH REMAINS IN EFFECT FROM THIS EVENING THROUGH
SUNDAY MORNING. 

OVERALL...WINDS OF 25 TO 35 MPH WITH GUSTS UP TO 45 MPH ARE
EXPECTED ACROSS NORTHWEST MONTANA.

THE FOLLOWING FAVORED AREAS FOR CHANNELING HAVE THE POTENTIAL FOR
WINDS OF 30 TO 40 MPH WITH GUSTS UP TO 55 MPH. EUREKA...THE
HIGHWAY 93 CORRIDOR NORTH OF FORTINE...KALISPELL...COLUMBIA
FALLS...BADROCK CANYON...LOGAN PASS...AND ELEVATIONS ABOVE
6000 FEET.

AREAS ALONG SOUTHERN FLATHEAD LAKE ARE EXPECTED TO RECEIVE WINDS
OF 25 TO 35 MPH WITH GUSTS TO 45 MPH. STRONG WINDS OVER THE LAKE
COULD CREATE LARGE WAVES WHICH MAY CAUSE DAMAGE ALONG THE
LAKE SHORE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A HIGH WIND WATCH MEANS THERE IS THE POTENTIAL FOR A HAZARDOUS
HIGH WIND EVENT. SUSTAINED WINDS OF AT LEAST 40 MPH...OR GUSTS OF
50 MPH OR STRONGER MAY OCCUR. CONTINUE TO MONITOR THE LATEST
FORECASTS.

&&

$$

000 
WWUS75 KMSO 032005
NPWMSO

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE MISSOULA MT
205 PM MDT SAT OCT 3 2009

.A STRONG LOW PRESSURE SYSTEM WILL BE TRACKING ACROSS THE GREAT
BASIN LATE TONIGHT AND SUNDAY. A NORTHERLY SURFACE PRESSURE
GRADIENT IS ALREADY TIGHTENING UP ACROSS WESTERN MONTANA THIS
AFTERNOON AND WILL CONTINUE TO STRENGTHEN TONIGHT. STRONG EAST TO
NORTHEAST WINDS ALOFT WILL COMPLIMENT THE SURFACE GRADIENT
CREATING STRONG SURFACE WINDS ACROSS MUCH OF WESTERN MONTANA.

MTZ002-040500-
/O.UPG.KMSO.HW.A.0002.091004T0300Z-091004T1800Z/
/O.NEW.KMSO.HW.W.0004.091004T0300Z-091004T2100Z/
WEST GLACIER REGION-
205 PM MDT SAT OCT 3 2009

...HIGH WIND WARNING IN EFFECT FROM 9 PM THIS EVENING TO 3 PM MDT
SUNDAY...

THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A HIGH WIND
WARNING...WHICH IS IN EFFECT FROM 9 PM THIS EVENING TO 3 PM MDT
SUNDAY. THE HIGH WIND WATCH IS NO LONGER IN EFFECT. 

WIDESPREAD EAST TO NORTHEAST SUSTAINED WINDS OF 25 TO 35 MPH WITH
GUSTS UP TO 45 MPH ARE EXPECTED TONIGHT AND INTO SUNDAY.

THE FOLLOWING AREAS DENOTE LOCATIONS WHERE EVEN STRONGER WINDS ARE
EXPECTED DUE TO CHANNELING AND TOPOGRAPHY. COLUMBIA FALLS...
THROUGH BAD ROCK CANYON...LOGAN PASS...AND ELEVATIONS ABOVE 6000
FEET WILL SEE WINDS OF 30 TO 40 MPH WITH GUSTS UP TO 55 MPH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

MTZ003-040500-
/O.UPG.KMSO.HW.A.0002.091004T0300Z-091004T1800Z/
/O.NEW.KMSO.HW.W.0004.091004T0300Z-091004T2100Z/
FLATHEAD/MISSION VALLEYS-
205 PM MDT SAT OCT 3 2009

...HIGH WIND WARNING IN EFFECT FROM 9 PM THIS EVENING TO 3 PM MDT
SUNDAY...

THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A HIGH WIND
WARNING...WHICH IS IN EFFECT FROM 9 PM THIS EVENING TO 3 PM MDT
SUNDAY. THE HIGH WIND WATCH IS NO LONGER IN EFFECT. 

NORTH WINDS OF 25 TO 35 MPH WITH GUSTS UP TO 45 MPH ARE EXPECTED
TO DEVELOP ACROSS THE FLATHEAD/MISSION VALLEY. A FEW LOCATIONS CAN
SEE GUSTS UP TO 50 MPH WHERE WINDS ARE CHANNELED JUST NORTH OF
KALISPELL.

AREAS ALONG SOUTHERN FLATHEAD LAKE ARE EXPECTED TO RECEIVE WINDS
OF 20 TO 30 MPH WITH GUSTS UP TO 45 MPH. STRONG WINDS OVER THE
LAKE COULD CREATE LARGE WAVES WHICH MAY CAUSE DAMAGE ALONG THE
NORTH FACING SHORELINES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

MTZ001-040500-
/O.UPG.KMSO.HW.A.0002.091004T0300Z-091004T1800Z/
/O.NEW.KMSO.HW.W.0004.091004T0300Z-091004T2100Z/
KOOTENAI/CABINET REGION-
205 PM MDT SAT OCT 3 2009

...HIGH WIND WARNING IN EFFECT FROM 9 PM THIS EVENING TO 3 PM MDT
SUNDAY...

THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A HIGH WIND
WARNING...WHICH IS IN EFFECT FROM 9 PM THIS EVENING TO 3 PM MDT
SUNDAY. THE HIGH WIND WATCH IS NO LONGER IN EFFECT. 

OVERALL...NORTH TO NORTHEAST WINDS OF 20 TO 30 MPH WITH GUSTS UP
TO 45 MPH ARE EXPECTED ACROSS THE KOOTENAI/CABINET REGION.

THE FOLLOWING FAVORED AREAS FOR CHANNELING HAVE THE POTENTIAL FOR
WINDS OF 30 TO 40 MPH WITH GUSTS UP TO 55 MPH. EUREKA...AND THE
HIGHWAY 93 CORRIDOR NORTH OF FORTINE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

MTZ007-043-040500-
/O.NEW.KMSO.WI.Y.0016.091004T0300Z-091004T2100Z/
BUTTE/BLACKFOOT REGION-POTOMAC/SEELEY LAKE REGION-
205 PM MDT SAT OCT 3 2009

...WIND ADVISORY IN EFFECT FROM 9 PM THIS EVENING TO 3 PM MDT
SUNDAY...

THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A WIND
ADVISORY...WHICH IS IN EFFECT FROM 9 PM THIS EVENING TO 3 PM MDT
SUNDAY. 

EAST TO NORTHEAST WINDS 20 TO 30 MPH WITH GUSTS UP TO 45 MPH ARE
EXPECTED TO DEVELOP TONIGHT THROUGH THE HIGHWAY 200 AND 141
CORRIDORS...INCLUDING HELMVILLE....AVON...AND THROUGH THE OVANDO
AREA. HIGHER TERRAIN ABOVE 5500 FEET WILL ALSO BE IMPACTED BY
STRONG WINDS. THESE WINDS WILL CONTINUE INTO SUNDAY.

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.

&&

$$

MTZ005-040500-
/O.NEW.KMSO.WI.Y.0016.091004T0300Z-091004T2100Z/
MISSOULA/BITTERROOT VALLEYS-
205 PM MDT SAT OCT 3 2009

...WIND ADVISORY IN EFFECT FROM 9 PM THIS EVENING TO 3 PM MDT
SUNDAY...

THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A WIND
ADVISORY...WHICH IS IN EFFECT FROM 9 PM THIS EVENING TO 3 PM MDT
SUNDAY. 

EAST TO NORTHEAST WINDS 20 TO 30 MPH WITH GUSTS UP TO 45 MPH ARE
EXPECTED TO DEVELOP TONIGHT THROUGH HELLGATE CANYON...SPILLING
INTO THE MISSOULA VALLEY. THESE WINDS WILL CONTINUE INTO SUNDAY.

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.

&&

$$

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MISSOULA MT
231 PM MDT FRI OCT 2 2009

...STRONG WINDS EXPECTED OVER NORTHWEST MONTANA SATURDAY EVENING AND
SUNDAY...

...SIGNIFICANT SNOW POSSIBLE IN THE MOUNTAINS OF CENTRAL IDAHO AND
SOUTHWEST MONTANA THIS WEEKEND...

.DISCUSSION...
TEMPERATURES AND WIND...
SATURDAY THROUGH SUNDAY...A STRONG LOW PRESSURE WILL BE DEEPENING
AS IT MOVES SOUTHWARD OVER SOUTHERN OREGON/NORTHERN CALIFORNIA BY
SUNDAY MORNING. A COMBINATION OF VERY STRONG WINDS ALOFT AND AN
IMPRESSIVE TIGHTENING OF A NORTHEAST SURFACE PRESSURE GRADIENT
ACROSS WESTERN MONTANA WILL RESULT IN INCREASING WINDS SATURDAY.
NORTHEAST WINDS WILL PEAK SATURDAY NIGHT INTO SUNDAY MORNING
ACROSS NORTHWEST MONTANA PROMPTING THE ISSUANCE OF A HIGH WIND
WATCH (HIGHLIGHT OUR SECTION BELOW). HIGHER ELEVATIONS AS WELL AS
A FEW VALLEY LOCATIONS COULD SEE SUSTAINED WINDS 30 TO 40 MPH WITH
GUSTS UP TO 55 MPH DURING THIS PEAK PERIOD.

SUNDAY NIGHT AND MONDAY...THE LOW PRESSURE SYSTEM EVENTUALLY MOVES
OVER SOUTHERN IDAHO AND BEGINS TO FILL. WINDS ALOFT BEGIN TO
DECREASE AND THE NORTHERLY SURFACE PRESSURE GRADIENT RELAXES.
THUS...SURFACE WINDS WILL BE DECREASING. TEMPERATURES WILL BE
COOLING THIS WEEKEND AND INTO THE FIRST PART OF NEXT WEEK.
EXPECT NEAR NORMAL TEMPS SATURDAY...THEN BELOW NORMAL VALUES
SUNDAY THROUGH WEDNESDAY.

PRECIPITATION...
THE LOW PRESSURE SYSTEM WILL CONTINUE TO DIG SOUTHWARD OUT OF
BRITISH COLUMBIA INTO EASTERN WASHINGTON AND OREGON TONIGHT
THROUGH TOMORROW. THE PATH OF THIS SYSTEM WILL ALLOW SHOWERS TO
TRACK ACROSS NORTHWEST MONTANA INTO NORTH CENTRAL IDAHO. AT THIS
TIME THE SNOW LEVELS WILL REMAIN FAIRLY HIGH SO ONLY THE HIGHEST
PEAKS WILL SEE SNOW TONIGHT AND TOMORROW. SATURDAY NIGHT AND
SUNDAY THE MID-LEVEL LOW PRESSURE SYSTEM WILL BEGIN TO TRACK TO
THE EAST OVER SOUTHERN IDAHO. THIS PATH IS EXPECTED TO CAUSE
WRAP-AROUND PRECIPITATION TO AFFECT THE SOUTHERN CLEARWATER
MOUNTAINS AND LEMHI COUNTY IDAHO. THE SNOW LEVELS WILL GRADUALLY
DROP TO AROUND 5000 FEET BY SUNDAY AFTERNOON. PORTIONS OF
SOUTHERN IDAHO AND LEMHI COUNTIES COULD SEE ACCUMULATING SNOW BY
SUNDAY AFTERNOON. THIS PRESSURE SYSTEM CONTINUES TO SWING OUT OF
SOUTHERN IDAHO INTO WYOMING. THE WRAP-AROUND MOISTURE IS EXPECTED
TO AFFECT LEMHI COUNTY SUNDAY NIGHT AND MOVE INTO THE
BUTTE/PINTLAR REGION ON MONDAY. THE CURRENT MODEL RUNS ARE
INDICATING THAT REGIONS FROM LEADORE IDAHO UP TO BUTTE MONTANA
COULD SEE SUBSTANTIAL SNOW ACCUMULATIONS FROM THIS SYSTEM SUNDAY
AFTERNOON THROUGH MONDAY. A WINTER STORM WATCH HAS BEEN ISSUED FOR
EASTERN LEMHI COUNTY ABOVE 5500 FEET FOR NOON SUNDAY THROUGH NOON
MONDAY. THE BUTTE REGION WILL CONTINUE TO BE MONITORED FOR THE
POTENTIAL OF A HIGHLIGHT. A SMALL VARIATION IN THE TRACK OF THIS
LOW PRESSURE SYSTEM COULD HAVE A SIGNIFICANT IMPACT ON THE
LOCATION OF THE HEAVIEST PRECIPITATION. PLEASE REFERENCE
WWW.WEATHER.GOV/MISSOULA FOR THE MOST CURRENT INFORMATION ON
FORECAST UPDATES AND DEVELOPMENTS.

MONDAY NIGHT THROUGH FRIDAY...THE MODELS ARE INDICATING THAT THE
NORTHERN ROCKIES WILL HAVE A BRIEF PERIOD OF RIDGING MONDAY NIGHT
THROUGH TUESDAY NIGHT. THIS RIDGE APPEARS TO GIVE THE NORTHERN
ROCKIES THEIR DRIEST PERIODS. ON WEDNESDAY THE ECMWF IS SHOWING A
SUBSTANTIAL DISTURBANCE MOVING OUT OF ALBERTA INTO THE NORTHERN
ROCKIES...WHILE THE GFS KEEPS GENERAL NORTHWEST FLOW. AT THIS
TIME...THE CHANCE FOR PRECIPITATION HAS BEEN RAISED CLOSER TO
CLIMATOLOGY. FRIDAY...THE MODELS ARE TRENDING TOWARD ANOTHER
SYSTEM MOVING OUT OF CENTRAL CANADA AND IT IS EXPECTED TO BE
COLDER THAN THE SYSTEM THIS WEEKEND.

&&

.AVIATION...A SYSTEM MOVING THROUGH THE NORTHWEST UNITED STATES
WILL BRING SHOWERS AND INCREASED CLOUD COVER TO THE REGION THROUGH
TONIGHT WHICH WILL OBSCURE HIGHER TERRAIN. WINDS WILL PICK UP SOME
THIS AFTERNOON IN ADVANCE OF THIS SYSTEM. A MUCH STRONGER SYSTEM
WILL MOVE INTO THE REGION ON SATURDAY BRINGING MUCH STRONGER
WINDS.

&&

.MSO WATCHES/WARNINGS/ADVISORIES...
MT...HIGH WIND WATCH FROM SATURDAY EVENING THROUGH SUNDAY MORNING FOR
     FLATHEAD/MISSION VALLEYS-KOOTENAI/CABINET REGION-WEST
     GLACIER REGION.

ID...WINTER STORM WATCH FROM SUNDAY AFTERNOON THROUGH MONDAY MORNING
     ABOVE 5500 FEET FOR EASTERN LEMHI COUNTY.

&&

WIND AND TEMPERATURES...MSJ/DEROSA
PRECIPITATION....SMITH
AVIATION...LOEFFELBEIN

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE MISSOULA MT
353 AM MDT FRI OCT 2 2009

IDZ006-009-010-MTZ006-007-022200-
SOUTHERN CLEARWATER MOUNTAINS-WESTERN LEMHI COUNTY-
EASTERN LEMHI COUNTY-BITTERROOT/SAPPHIRE MOUNTAINS-
BUTTE/BLACKFOOT REGION-
353 AM MDT FRI OCT 2 2009 /253 AM PDT FRI OCT 2 2009/

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

.DAY ONE...TODAY AND TONIGHT

NO SIGNIFICANT WEATHER IS EXPECTED FOR TODAY AND TONIGHT.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

A LOW PRESSURE SYSTEM MOVING THROUGH THE NORTHWEST U.S. INTO THE
NORTHERN GREAT BASIN THIS WEEKEND HAS THE POTENTIAL TO PRODUCE
SIGNIFICANT MOUNTAIN SNOW OVER CENTRAL IDAHO AND SOUTHWEST
MONTANA. THE HIGHER VALLEYS MAY ALSO SEE SNOW ACCUMULATIONS BUT IT
WILL BE LATE IN THE EVENT. SNOW LEVELS ARE EXPECTED TO STAY ABOVE
MOST VALLEYS UNTIL SUNDAY AFTERNOON.

.SPOTTER INFORMATION STATEMENT...

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

MTZ001>003-022200-
KOOTENAI/CABINET REGION-WEST GLACIER REGION-
FLATHEAD/MISSION VALLEYS-
353 AM MDT FRI OCT 2 2009

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHWEST
MONTANA.

.DAY ONE...TODAY AND TONIGHT

NO SIGNIFICANT WEATHER IS EXPECTED FOR TODAY AND TONIGHT.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

A LOW PRESSURE SYSTEM MOVING THROUGH NORTHWEST U.S. INTO THE
NORTHERN GREAT BASIN THIS WEEKEND HAS THE POTENTIAL TO PRODUCE
STRONG NORTHEAST WINDS ACROSS NORTHWEST MONTANA. THE WINDS ARE
EXPECTED TO PICK UP SATURDAY AFTERNOON THEN FURTHER INTENSIFY
SATURDAY NIGHT. SUSTAINED WINDS NEAR 30 MPH WITH GUSTS IN EXCESS
OF 40 MPH ARE POSSIBLE FROM SATURDAY EVENING INTO SUNDAY.

.SPOTTER INFORMATION STATEMENT...

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