Blizzard Warning 1, NWS Missoula, MT

000 
WWUS45 KMSO 201148
WSWMSO

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE MISSOULA MT
448 AM MST SUN JAN 20 2008

.A STRONG ARCTIC PUSH OF AIR CLASHING WITH A LOW PRESSURE SYSTEM
DROPPING SOUTH FROM CANADA WILL CONTINUE TO PRODUCE SNOWFALL AND
STRONG AND GUSTY NORTHEAST TO EAST WINDS SUNDAY PRODUCING SNOW AND
BLOWING SNOW. THE BIGGEST CONCERN ASSOCIATED WITH THIS SYSTEM
WILL CONTINUE TO BE AREAS OF WHITE OUT CONDITIONS AT TIMES. IN
ADDITION...THESE INTENSE EAST TO NORTHEAST WINDS WILL USHER A
BITTERLY COLD AIR MASS INTO WESTERN MONTANA...CREATING DANGEROUSLY
COLD WIND CHILL VALUES SUNDAY AFTERNOON THROUGH MONDAY.

MTZ043-201900-
/O.CAN.KMSO.BZ.W.0001.000000T0000Z-080120T1800Z/
/O.NEW.KMSO.WW.Y.0002.080120T1148Z-080121T0000Z/
/O.UPG.KMSO.WC.Y.0001.080120T1800Z-080122T0000Z/
/O.NEW.KMSO.WC.W.0001.080121T0000Z-080122T0000Z/
POTOMAC/SEELEY LAKE REGION-
448 AM MST SUN JAN 20 2008

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...
...WIND CHILL WARNING IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 PM
MST MONDAY...
...BLIZZARD WARNING IS CANCELLED...
...WIND CHILL ADVISORY NO LONGER IN EFFECT...

THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A WIND CHILL
WARNING...WHICH IS IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 PM MST
MONDAY. A WINTER WEATHER ADVISORY HAS ALSO BEEN ISSUED. THIS
WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON. THE BLIZZARD WARNING HAS BEEN CANCELED. THE WIND
CHILL ADVISORY IS NO LONGER IN EFFECT. 

MODERATE TO HEAVY SNOWFALL AT TIMES WILL CONTINUE SUNDAY AS AN
ARCTIC AIRMASS CONTINUES TO MOVE INTO THE REGION. ADDITIONAL
SNOWFALL ACCUMULATIONS OF 2 TO 4 INCHES ARE EXPECTED BY SUNDAY
AFTERNOON. IN ADDITION...EAST TO NORTHEAST WINDS OF 20 TO 30 MPH
WITH FREQUENT GUSTS TO 40 MPH WILL CREATE WIDESPREAD BLOWING AND
DRIFTING OF SNOW AND REDUCED VISIBILITY. LOCAL WHITE OUT
CONDITIONS CAN BE EXPECTED ACROSS OPEN ROADWAYS AND
FIELDS...ESPECIALLY ALONG HIGHWAY 200 FROM BONNER TO CLEARWATER
JUNCTION AND I-90 FROM MISSOULA TO BONNER. 

ALTHOUGH SNOW WILL BE DIMINISHING THIS AFTERNOON...BRISK WINDS
WILL LEAD TO VERY COLD WIND CHILL VALUES. WIND CHILLS OF 20 TO 30
DEGREES BELOW ZERO WILL CONTINUE INTO MONDAY.

A WIND CHILL WARNING MEANS THE COMBINATION OF VERY COLD AIR AND
STRONG WINDS WILL CREATE DANGEROUSLY LOW WIND CHILL VALUES. THIS
WILL RESULT IN FROST BITE AND LEAD TO HYPOTHERMIA OR DEATH IF
PRECAUTIONS ARE NOT TAKEN.

A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET...OR
FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR
SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE
DRIVING.

$$

MTZ005-201900-
/O.CAN.KMSO.BZ.W.0001.000000T0000Z-080120T1800Z/
/O.NEW.KMSO.WW.Y.0002.080120T1148Z-080121T0000Z/
/O.NEW.KMSO.WC.Y.0002.080121T0000Z-080122T0000Z/
MISSOULA/BITTERROOT VALLEYS-
448 AM MST SUN JAN 20 2008

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...
...WIND CHILL ADVISORY IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 PM
MST MONDAY...
...BLIZZARD WARNING IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A WINTER
WEATHER ADVISORY...WHICH IS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON. A WIND CHILL ADVISORY HAS ALSO BEEN ISSUED. THIS WIND
CHILL ADVISORY IS IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 PM MST
MONDAY. THE BLIZZARD WARNING HAS BEEN CANCELED. 

MODERATE TO HEAVY SNOWFALL AT TIMES WILL CONTINUE SUNDAY AS AN
ARCTIC AIRMASS CONTINUES TO MOVE INTO THE REGION. ADDITIONAL
SNOWFALL ACCUMULATIONS OF 2 TO 4 INCHES ARE EXPECTED BY SUNDAY
AFTERNOON. IN ADDITION...EAST TO NORTHEAST WINDS OF 20 TO 30 MPH
WITH FREQUENT GUSTS TO 40 MPH WILL CREATE WIDESPREAD BLOWING AND
DRIFTING OF SNOW AND REDUCED VISIBILITY. LOCAL WHITE OUT
CONDITIONS CAN BE EXPECTED ACROSS OPEN ROADWAYS AND IN THE EAST
HALF OF MISSOULA. 

ALTHOUGH SNOW WILL BE ENDING THIS AFTERNOON...BRISK WINDS WILL
LEAD TO VERY COLD WIND CHILL VALUES. WIND CHILLS OF 10 TO 20
DEGREES BELOW ZERO WILL CONTINUE INTO MONDAY.

A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET...OR
FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR
SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE
DRIVING.

A WIND CHILL ADVISORY MEANS THAT VERY COLD AIR AND STRONG WINDS
WILL COMBINE TO GENERATE LOW WIND CHILLS. THIS WILL RESULT IN
FROST BITE AND LEAD TO HYPOTHERMIA IF PRECAUTIONS ARE NOT TAKEN. 
IF YOU MUST VENTURE OUTDOORS...MAKE SURE YOU WEAR A HAT AND
GLOVES.

$$

MTZ007-201900-
/O.CAN.KMSO.WS.W.0003.000000T0000Z-080120T1800Z/
/O.NEW.KMSO.WW.Y.0002.080120T1148Z-080121T0000Z/
/O.UPG.KMSO.WC.Y.0001.080120T1800Z-080122T0000Z/
/O.NEW.KMSO.WC.W.0001.080121T0000Z-080122T0000Z/
BUTTE/BLACKFOOT REGION-
448 AM MST SUN JAN 20 2008

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...
...WIND CHILL WARNING IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 PM
MST MONDAY...
...WINTER STORM WARNING IS CANCELLED...
...WIND CHILL ADVISORY NO LONGER IN EFFECT...

THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A WIND CHILL
WARNING...WHICH IS IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 PM MST
MONDAY. A WINTER WEATHER ADVISORY HAS ALSO BEEN ISSUED. THIS
WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON. THE WINTER STORM WARNING HAS BEEN CANCELED. THE WIND
CHILL ADVISORY IS NO LONGER IN EFFECT. 

MODERATE TO HEAVY SNOWFALL AT TIMES WILL CONTINUE SUNDAY AS AN
ARCTIC AIRMASS CONTINUES TO MOVE INTO THE REGION. ADDITIONAL
SNOWFALL ACCUMULATIONS OF 2 TO 5 INCHES ARE EXPECTED BY SUNDAY
AFTERNOON. IN ADDITION...EAST TO NORTHEAST WINDS OF 20 TO 30 MPH
WITH FREQUENT GUSTS TO 40 MPH WILL CREATE WIDESPREAD BLOWING AND
DRIFTING OF SNOW AND REDUCED VISIBILITY. LOCAL WHITE OUT
CONDITIONS CAN BE EXPECTED ACROSS OPEN ROADWAYS.

ALTHOUGH SNOW WILL BE ENDING SUNDAY AFTERNOON...BRISK WINDS WILL
LEAD TO VERY COLD WIND CHILL VALUES. WIND CHILLS OF 25 TO 35
DEGREES BELOW ZERO WILL CONTINUE INTO MONDAY.

A WIND CHILL WARNING MEANS THE COMBINATION OF VERY COLD AIR AND
STRONG WINDS WILL CREATE DANGEROUSLY LOW WIND CHILL VALUES. THIS
WILL RESULT IN FROST BITE AND LEAD TO HYPOTHERMIA OR DEATH IF
PRECAUTIONS ARE NOT TAKEN.

A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET...OR
FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR
SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE
DRIVING.

$$

MTZ002-201900-
/O.CAN.KMSO.WS.W.0003.000000T0000Z-080120T1200Z/
/O.NEW.KMSO.WW.Y.0002.080120T1148Z-080121T0000Z/
/O.UPG.KMSO.WC.Y.0001.080120T1200Z-080122T0000Z/
/O.NEW.KMSO.WC.W.0001.080121T0000Z-080122T0000Z/
WEST GLACIER REGION-
448 AM MST SUN JAN 20 2008

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...
...WIND CHILL WARNING IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 PM
MST MONDAY...
...WINTER STORM WARNING IS CANCELLED...
...WIND CHILL ADVISORY NO LONGER IN EFFECT...

THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A WIND CHILL
WARNING...WHICH IS IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 PM MST
MONDAY. A WINTER WEATHER ADVISORY HAS ALSO BEEN ISSUED. THIS
WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON. THE WINTER STORM WARNING HAS BEEN CANCELED. THE WIND
CHILL ADVISORY IS NO LONGER IN EFFECT. 

MODERATE TO HEAVY SNOWFALL AT TIMES WILL CONTINUE SUNDAY MORNING AS
AN ARCTIC AIRMASS CONTINUES TO MOVE INTO THE REGION. ADDITIONAL
SNOWFALL ACCUMULATIONS OF 1 TO 2 INCHES ARE EXPECTED SUNDAY MORNING.
IN ADDITION...EAST TO NORTHEAST WINDS OF 20 TO 30 MPH WITH
FREQUENT GUSTS TO 40 MPH WILL CREATE WIDESPREAD BLOWING AND
DRIFTING OF SNOW AND REDUCED VISIBILITY. LOCAL WHITE OUT
CONDITIONS CAN BE EXPECTED ACROSS OPEN ROADWAYS. SNOWFALL WILL
DIMINISH IN THE AFTERNOON BUT CONSIDERABLE BLOWING OF SNOW WILL
PERSIST. 

ALTHOUGH SNOW WILL BE ENDING SUNDAY AFTERNOON...BRISK WINDS WILL
LEAD TO VERY COLD WIND CHILL VALUES. WIND CHILLS OF 25 TO 35
DEGREES BELOW ZERO WILL CONTINUE INTO MONDAY.

A WIND CHILL WARNING MEANS THE COMBINATION OF VERY COLD AIR AND
STRONG WINDS WILL CREATE DANGEROUSLY LOW WIND CHILL VALUES. THIS
WILL RESULT IN FROST BITE AND LEAD TO HYPOTHERMIA OR DEATH IF
PRECAUTIONS ARE NOT TAKEN.

A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET...OR
FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR
SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE
DRIVING.

$$

MTZ003-201900-
/O.CAN.KMSO.WS.W.0003.000000T0000Z-080120T1200Z/
/O.NEW.KMSO.WW.Y.0002.080120T1148Z-080121T0000Z/
/O.NEW.KMSO.WC.Y.0002.080121T0000Z-080122T0000Z/
FLATHEAD/MISSION VALLEYS-
448 AM MST SUN JAN 20 2008

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...
...WIND CHILL ADVISORY IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 PM
MST MONDAY...
...WINTER STORM WARNING IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A WINTER
WEATHER ADVISORY...WHICH IS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON. A WIND CHILL ADVISORY HAS ALSO BEEN ISSUED. THIS WIND
CHILL ADVISORY IS IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 PM MST
MONDAY. THE WINTER STORM WARNING HAS BEEN CANCELED. 

MODERATE TO HEAVY SNOWFALL AT TIMES WILL CONTINUE SUNDAY MORNING
AS AN ARCTIC AIRMASS CONTINUES TO MOVE INTO THE REGION.
ADDITIONAL SNOWFALL ACCUMULATIONS OF AROUND 1 INCH ARE EXPECTED
SUNDAY MORNING. IN ADDITION...EAST TO NORTHEAST WINDS OF 20 TO 30
MPH WITH FREQUENT GUSTS TO 40 MPH WILL CREATE WIDESPREAD BLOWING
AND DRIFTING OF SNOW AND REDUCED VISIBILITY. LOCAL WHITE OUT
CONDITIONS CAN BE EXPECTED ACROSS OPEN ROADWAYS. SNOWFALL WILL
DIMINISH IN THE AFTERNOON BUT CONSIDERABLE BLOWING OF SNOW WILL
PERSIST. 

ALTHOUGH SNOW WILL BE ENDING THIS AFTERNOON...BRISK WINDS WILL LEAD TO
VERY COLD WIND CHILL VALUES. WIND CHILLS OF 10 TO 20 DEGREES BELOW
ZERO WILL CONTINUE INTO MONDAY.

A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET...OR
FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR
SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE
DRIVING.

A WIND CHILL ADVISORY MEANS THAT VERY COLD AIR AND STRONG WINDS
WILL COMBINE TO GENERATE LOW WIND CHILLS. THIS WILL RESULT IN
FROST BITE AND LEAD TO HYPOTHERMIA IF PRECAUTIONS ARE NOT TAKEN. 
IF YOU MUST VENTURE OUTDOORS...MAKE SURE YOU WEAR A HAT AND
GLOVES.

$$

MTZ001-004-201900-
/O.CAN.KMSO.WS.W.0003.000000T0000Z-080120T1800Z/
/O.EXB.KMSO.SB.Y.0004.080120T1200Z-080121T0000Z/
KOOTENAI/CABINET REGION-LOWER CLARK FORK REGION-
448 AM MST SUN JAN 20 2008

...SNOW AND BLOWING SNOW ADVISORY IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...
...WINTER STORM WARNING IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A SNOW AND
BLOWING SNOW ADVISORY...WHICH IS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON. THE WINTER STORM WARNING HAS BEEN CANCELED. 

SNOW WILL CONTINUE SUNDAY MORNING THEN GRADUALLY DECREASES A LOW PRESSURE
MOVES SOUTH THROUGH IDAHO. ADDITIONAL SNOW ACCUMULATIONS OF AROUND
1 INCH ARE EXPECTED SUNDAY MORNING. NORTH TO NORTHEAST WINDS OF
10 TO 20 MPH WITH GUSTS TO 30 MPH WILL CONTINUE INTO SUNDAY
CREATING AREAS OF BLOWING AND DRIFTING SNOW. DRIVING CONDITIONS
OVER LOOKOUT PASS WILL BE MOST EFFECTED.

A SNOW AND BLOWING SNOW ADVISORY MEANS THAT VISIBILITIES WILL BE
LIMITED DUE TO A COMBINATION OF FALLING AND BLOWING SNOW. USE
CAUTION WHEN TRAVELING...ESPECIALLY IN OPEN AREAS.

$$

IDZ009-010-201900-
/O.EXB.KMSO.SN.Y.0006.080120T1200Z-080121T0000Z/
WESTERN LEMHI COUNTY-EASTERN LEMHI COUNTY-
448 AM MST SUN JAN 20 2008

...SNOW ADVISORY IN EFFECT UNTIL 5 PM MST THIS AFTERNOON...

THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A SNOW
ADVISORY...WHICH IS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON. 

TOTAL SNOWFALL ACCUMULATIONS OF 2 TO 5 INCHES IN THE VALLEYS AND
PASSES WITH UP TO 10 INCHES IN THE MOUNTAINS CAN BE EXPECTED
THROUGH EARLY SUNDAY EVENING. LIGHT SNOWFALL WILL BECOME MODERATE
DURING THE MORNING HOURS. EXPECT DIFFICULT DRIVING CONDITIONS
ACROSS LOST TRAIL PASS TODAY.

A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY
TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND
LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING.

$$

IDZ007-008-201900-
/O.EXT.KMSO.SB.Y.0004.000000T0000Z-080121T0000Z/
OROFINO/GRANGEVILLE REGION-LOWER HELLS CANYON/SALMON RIVER REGION-
348 AM PST SUN JAN 20 2008

...SNOW AND BLOWING SNOW ADVISORY NOW IN EFFECT UNTIL 4 PM PST
THIS AFTERNOON...

THE SNOW AND BLOWING SNOW ADVISORY IS NOW IN EFFECT UNTIL 4 PM
PST THIS AFTERNOON. 

SNOW WILL INTENSIFY DURING THE MORNING HOURS AS LOW PRESSURE
MOVES SOUTH THROUGH IDAHO. TOTAL SNOWFALL ACCUMULATIONS OF 3 TO 7
INCHES CAN BE EXPECTED BY SUNDAY AFTERNOON...ESPECIALLY FROM
OROFINO SOUTHWARD TO GRANGEVILLE. NORTH TO NORTHEAST WINDS OF 10
TO 20 MPH WITH GUSTS TO 30 MPH ARE EXPECTED TODAY CREATING AREAS
OF BLOWING AND DRIFTING SNOW. ADDITIONAL AREAS AFFECTED WILL BE
HIGHWAY 12 OVER WHITEBIRD GRADE WHERE DRIVING CONDITIONS COULD
BECOME HAZARDOUS.

A SNOW AND BLOWING SNOW ADVISORY MEANS THAT VISIBILITIES WILL BE
LIMITED DUE TO A COMBINATION OF FALLING AND BLOWING SNOW. USE
CAUTION WHEN TRAVELING...ESPECIALLY IN OPEN AREAS.

$$

IDZ005-006-MTZ006-201900-
/O.EXT.KMSO.SN.Y.0006.000000T0000Z-080121T0000Z/
NORTHERN CLEARWATER MOUNTAINS-SOUTHERN CLEARWATER MOUNTAINS-
BITTERROOT/SAPPHIRE MOUNTAINS-
448 AM MST SUN JAN 20 2008 /348 AM PST SUN JAN 20 2008/

...SNOW ADVISORY NOW IN EFFECT UNTIL 5 PM MST /4 PM PST/ THIS
AFTERNOON...

THE SNOW ADVISORY IS NOW IN EFFECT UNTIL 5 PM MST /4 PM PST/ THIS
AFTERNOON. 

TOTAL SNOWFALL ACCUMULATIONS OF 4 TO 7 INCHES IN THE VALLEYS AND
PASSES WITH UP TO 12 INCHES IN THE MOUNTAINS CAN BE EXPECTED
SUNDAY. LIGHT TO MODERATE WILL CONTINUE OVER THE NORTHERN
CLEARWATER MOUNTAINS...THE HIGHWAY 12 CORRIDOR INCLUDING LOLO PASS
THROUGHOUT THE DAY SUNDAY. 

A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY
TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND
LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING.

$$

000 
WWUS45 KMSO 201158 CCA
WSWMSO

URGENT - WINTER WEATHER MESSAGE...CORRECTED
NATIONAL WEATHER SERVICE MISSOULA MT
453 AM MST SUN JAN 20 2008

.A STRONG ARCTIC PUSH OF AIR CLASHING WITH A LOW PRESSURE SYSTEM
DROPPING SOUTH FROM CANADA WILL CONTINUE TO PRODUCE SNOWFALL AND
STRONG AND GUSTY NORTHEAST TO EAST WINDS SUNDAY PRODUCING SNOW AND
BLOWING SNOW. THE BIGGEST CONCERN ASSOCIATED WITH THIS SYSTEM
WILL CONTINUE TO BE AREAS OF WHITE OUT CONDITIONS AT TIMES. IN
ADDITION...THESE INTENSE EAST TO NORTHEAST WINDS WILL USHER A
BITTERLY COLD AIR MASS INTO WESTERN MONTANA...CREATING DANGEROUSLY
COLD WIND CHILL VALUES SUNDAY AFTERNOON THROUGH MONDAY.

MTZ043-201915-
/O.CAN.KMSO.BZ.W.0001.000000T0000Z-080120T1800Z/
/O.NEW.KMSO.WW.Y.0002.080120T1153Z-080121T0000Z/
/O.UPG.KMSO.WC.Y.0001.080120T1800Z-080122T0000Z/
/O.NEW.KMSO.WC.W.0001.080121T0000Z-080122T0000Z/
POTOMAC/SEELEY LAKE REGION-
453 AM MST SUN JAN 20 2008

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...
...WIND CHILL WARNING IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 PM
MST MONDAY...
...BLIZZARD WARNING IS CANCELLED...
...WIND CHILL ADVISORY NO LONGER IN EFFECT...

THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A WIND CHILL
WARNING...WHICH IS IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 PM MST
MONDAY. A WINTER WEATHER ADVISORY HAS ALSO BEEN ISSUED. THIS
WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON. THE BLIZZARD WARNING HAS BEEN CANCELED. THE WIND
CHILL ADVISORY IS NO LONGER IN EFFECT. 

MODERATE TO HEAVY SNOWFALL AT TIMES WILL CONTINUE SUNDAY AS AN
ARCTIC AIRMASS CONTINUES TO MOVE INTO THE REGION. ADDITIONAL
SNOWFALL ACCUMULATIONS OF 2 TO 4 INCHES ARE EXPECTED BY SUNDAY
AFTERNOON. IN ADDITION...EAST TO NORTHEAST WINDS OF 20 TO 30 MPH
WITH FREQUENT GUSTS TO 40 MPH WILL CREATE WIDESPREAD BLOWING AND
DRIFTING OF SNOW AND REDUCED VISIBILITY. LOCAL WHITE OUT
CONDITIONS CAN BE EXPECTED ACROSS OPEN ROADWAYS AND
FIELDS...ESPECIALLY ALONG HIGHWAY 200 FROM BONNER TO CLEARWATER
JUNCTION AND I-90 FROM MISSOULA TO BONNER. 

ALTHOUGH SNOW WILL BE DIMINISHING THIS AFTERNOON...BRISK WINDS
WILL LEAD TO VERY COLD WIND CHILL VALUES. WIND CHILLS OF 20 TO 30
DEGREES BELOW ZERO WILL CONTINUE INTO MONDAY.

A WIND CHILL WARNING MEANS THE COMBINATION OF VERY COLD AIR AND
STRONG WINDS WILL CREATE DANGEROUSLY LOW WIND CHILL VALUES. THIS
WILL RESULT IN FROST BITE AND LEAD TO HYPOTHERMIA OR DEATH IF
PRECAUTIONS ARE NOT TAKEN.

A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET...OR
FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR
SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE
DRIVING.

$$

MTZ005-201915-
/O.CAN.KMSO.BZ.W.0001.000000T0000Z-080120T1800Z/
/O.NEW.KMSO.WW.Y.0002.080120T1153Z-080121T0000Z/
/O.NEW.KMSO.WC.Y.0002.080121T0000Z-080122T0000Z/
MISSOULA/BITTERROOT VALLEYS-
453 AM MST SUN JAN 20 2008

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...
...WIND CHILL ADVISORY IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 PM
MST MONDAY...
...BLIZZARD WARNING IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A WINTER
WEATHER ADVISORY...WHICH IS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON. A WIND CHILL ADVISORY HAS ALSO BEEN ISSUED. THIS WIND
CHILL ADVISORY IS IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 PM MST
MONDAY. THE BLIZZARD WARNING HAS BEEN CANCELED. 

MODERATE TO HEAVY SNOWFALL AT TIMES WILL CONTINUE SUNDAY AS AN
ARCTIC AIRMASS CONTINUES TO MOVE INTO THE REGION. ADDITIONAL
SNOWFALL ACCUMULATIONS OF 2 TO 4 INCHES ARE EXPECTED BY SUNDAY
AFTERNOON. IN ADDITION...EAST TO NORTHEAST WINDS OF 20 TO 30 MPH
WITH FREQUENT GUSTS TO 40 MPH WILL CREATE WIDESPREAD BLOWING AND
DRIFTING OF SNOW AND REDUCED VISIBILITY. LOCAL WHITE OUT
CONDITIONS CAN BE EXPECTED ACROSS OPEN ROADWAYS AND IN THE EAST
HALF OF MISSOULA. 

ALTHOUGH SNOW WILL BE ENDING THIS AFTERNOON...BRISK WINDS WILL
LEAD TO VERY COLD WIND CHILL VALUES. WIND CHILLS OF 10 TO 20
DEGREES BELOW ZERO WILL CONTINUE INTO MONDAY.

A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET...OR
FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR
SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE
DRIVING.

A WIND CHILL ADVISORY MEANS THAT VERY COLD AIR AND STRONG WINDS
WILL COMBINE TO GENERATE LOW WIND CHILLS. THIS WILL RESULT IN
FROST BITE AND LEAD TO HYPOTHERMIA IF PRECAUTIONS ARE NOT TAKEN. 
IF YOU MUST VENTURE OUTDOORS...MAKE SURE YOU WEAR A HAT AND
GLOVES.

$$

MTZ007-201915-
/O.CAN.KMSO.WS.W.0003.000000T0000Z-080120T1800Z/
/O.NEW.KMSO.WW.Y.0002.080120T1153Z-080121T0000Z/
/O.UPG.KMSO.WC.Y.0001.080120T1800Z-080122T0000Z/
/O.NEW.KMSO.WC.W.0001.080121T0000Z-080122T0000Z/
BUTTE/BLACKFOOT REGION-
453 AM MST SUN JAN 20 2008

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...
...WIND CHILL WARNING IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 PM
MST MONDAY...
...WINTER STORM WARNING IS CANCELLED...
...WIND CHILL ADVISORY NO LONGER IN EFFECT...

THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A WIND CHILL
WARNING...WHICH IS IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 PM MST
MONDAY. A WINTER WEATHER ADVISORY HAS ALSO BEEN ISSUED. THIS
WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON. THE WINTER STORM WARNING HAS BEEN CANCELED. THE WIND
CHILL ADVISORY IS NO LONGER IN EFFECT. 

MODERATE TO HEAVY SNOWFALL AT TIMES WILL CONTINUE SUNDAY AS AN
ARCTIC AIRMASS CONTINUES TO MOVE INTO THE REGION. ADDITIONAL
SNOWFALL ACCUMULATIONS OF 2 TO 5 INCHES ARE EXPECTED BY SUNDAY
AFTERNOON. IN ADDITION...EAST TO NORTHEAST WINDS OF 20 TO 30 MPH
WITH FREQUENT GUSTS TO 40 MPH WILL CREATE WIDESPREAD BLOWING AND
DRIFTING OF SNOW AND REDUCED VISIBILITY. LOCAL WHITE OUT
CONDITIONS CAN BE EXPECTED ACROSS OPEN ROADWAYS.

ALTHOUGH SNOW WILL BE ENDING SUNDAY AFTERNOON...BRISK WINDS WILL
LEAD TO VERY COLD WIND CHILL VALUES. WIND CHILLS OF 25 TO 35
DEGREES BELOW ZERO WILL CONTINUE INTO MONDAY.

A WIND CHILL WARNING MEANS THE COMBINATION OF VERY COLD AIR AND
STRONG WINDS WILL CREATE DANGEROUSLY LOW WIND CHILL VALUES. THIS
WILL RESULT IN FROST BITE AND LEAD TO HYPOTHERMIA OR DEATH IF
PRECAUTIONS ARE NOT TAKEN.

A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET...OR
FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR
SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE
DRIVING.

$$

MTZ002-201915-
/O.CAN.KMSO.WS.W.0003.000000T0000Z-080120T1200Z/
/O.NEW.KMSO.WW.Y.0002.080120T1153Z-080121T0000Z/
/O.UPG.KMSO.WC.Y.0001.080120T1200Z-080122T0000Z/
/O.NEW.KMSO.WC.W.0001.080121T0000Z-080122T0000Z/
WEST GLACIER REGION-
453 AM MST SUN JAN 20 2008

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...
...WIND CHILL WARNING IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 PM
MST MONDAY...
...WINTER STORM WARNING IS CANCELLED...
...WIND CHILL ADVISORY NO LONGER IN EFFECT...

THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A WIND CHILL
WARNING...WHICH IS IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 PM MST
MONDAY. A WINTER WEATHER ADVISORY HAS ALSO BEEN ISSUED. THIS
WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON. THE WINTER STORM WARNING HAS BEEN CANCELED. THE WIND
CHILL ADVISORY IS NO LONGER IN EFFECT. 

MODERATE TO HEAVY SNOWFALL AT TIMES WILL CONTINUE SUNDAY MORNING AS
AN ARCTIC AIRMASS CONTINUES TO MOVE INTO THE REGION. ADDITIONAL
SNOWFALL ACCUMULATIONS OF 1 TO 2 INCHES ARE EXPECTED SUNDAY MORNING.
IN ADDITION...EAST TO NORTHEAST WINDS OF 20 TO 30 MPH WITH
FREQUENT GUSTS TO 40 MPH WILL CREATE WIDESPREAD BLOWING AND
DRIFTING OF SNOW AND REDUCED VISIBILITY. LOCAL WHITE OUT
CONDITIONS CAN BE EXPECTED ACROSS OPEN ROADWAYS. SNOWFALL WILL
DIMINISH IN THE AFTERNOON BUT CONSIDERABLE BLOWING OF SNOW WILL
PERSIST. 

ALTHOUGH SNOW WILL BE ENDING SUNDAY AFTERNOON...BRISK WINDS WILL
LEAD TO VERY COLD WIND CHILL VALUES. WIND CHILLS OF 25 TO 35
DEGREES BELOW ZERO WILL CONTINUE INTO MONDAY.

A WIND CHILL WARNING MEANS THE COMBINATION OF VERY COLD AIR AND
STRONG WINDS WILL CREATE DANGEROUSLY LOW WIND CHILL VALUES. THIS
WILL RESULT IN FROST BITE AND LEAD TO HYPOTHERMIA OR DEATH IF
PRECAUTIONS ARE NOT TAKEN.

A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET...OR
FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR
SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE
DRIVING.

$$

MTZ003-201915-
/O.CAN.KMSO.WS.W.0003.000000T0000Z-080120T1200Z/
/O.NEW.KMSO.WW.Y.0002.080120T1153Z-080121T0000Z/
/O.NEW.KMSO.WC.Y.0002.080121T0000Z-080122T0000Z/
FLATHEAD/MISSION VALLEYS-
453 AM MST SUN JAN 20 2008

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...
...WIND CHILL ADVISORY IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 PM
MST MONDAY...
...WINTER STORM WARNING IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A WINTER
WEATHER ADVISORY...WHICH IS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON. A WIND CHILL ADVISORY HAS ALSO BEEN ISSUED. THIS WIND
CHILL ADVISORY IS IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 PM MST
MONDAY. THE WINTER STORM WARNING HAS BEEN CANCELED. 

MODERATE TO HEAVY SNOWFALL AT TIMES WILL CONTINUE SUNDAY MORNING
AS AN ARCTIC AIRMASS CONTINUES TO MOVE INTO THE REGION.
ADDITIONAL SNOWFALL ACCUMULATIONS OF AROUND 1 INCH ARE EXPECTED
SUNDAY MORNING. IN ADDITION...EAST TO NORTHEAST WINDS OF 20 TO 30
MPH WITH FREQUENT GUSTS TO 40 MPH WILL CREATE WIDESPREAD BLOWING
AND DRIFTING OF SNOW AND REDUCED VISIBILITY. LOCAL WHITE OUT
CONDITIONS CAN BE EXPECTED ACROSS OPEN ROADWAYS. SNOWFALL WILL
DIMINISH IN THE AFTERNOON BUT CONSIDERABLE BLOWING OF SNOW WILL
PERSIST. 

ALTHOUGH SNOW WILL BE ENDING THIS AFTERNOON...BRISK WINDS WILL LEAD TO
VERY COLD WIND CHILL VALUES. WIND CHILLS OF 10 TO 20 DEGREES BELOW
ZERO WILL CONTINUE INTO MONDAY.

A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET...OR
FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR
SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE
DRIVING.

A WIND CHILL ADVISORY MEANS THAT VERY COLD AIR AND STRONG WINDS
WILL COMBINE TO GENERATE LOW WIND CHILLS. THIS WILL RESULT IN
FROST BITE AND LEAD TO HYPOTHERMIA IF PRECAUTIONS ARE NOT TAKEN. 
IF YOU MUST VENTURE OUTDOORS...MAKE SURE YOU WEAR A HAT AND
GLOVES.

$$

MTZ001-004-201915-
/O.CAN.KMSO.WS.W.0003.000000T0000Z-080120T1800Z/
/O.COR.KMSO.SB.Y.0004.080120T1200Z-080121T0000Z/
KOOTENAI/CABINET REGION-LOWER CLARK FORK REGION-
453 AM MST SUN JAN 20 2008

...SNOW AND BLOWING SNOW ADVISORY IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...
...WINTER STORM WARNING IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A SNOW AND
BLOWING SNOW ADVISORY...WHICH IS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON. THE WINTER STORM WARNING HAS BEEN CANCELED. 

SNOW WILL CONTINUE SUNDAY MORNING THEN GRADUALLY DECREASES A LOW PRESSURE
MOVES SOUTH THROUGH IDAHO. ADDITIONAL SNOW ACCUMULATIONS OF 1 TO 3
INCHES ARE EXPECTED SUNDAY MORNING. NORTH TO NORTHEAST WINDS OF 10
TO 20 MPH WITH GUSTS TO 30 MPH WILL CONTINUE INTO SUNDAY CREATING
AREAS OF BLOWING AND DRIFTING SNOW. DRIVING CONDITIONS OVER
LOOKOUT PASS WILL BE MOST EFFECTED.

A SNOW AND BLOWING SNOW ADVISORY MEANS THAT VISIBILITIES WILL BE
LIMITED DUE TO A COMBINATION OF FALLING AND BLOWING SNOW. USE
CAUTION WHEN TRAVELING...ESPECIALLY IN OPEN AREAS.

$$

IDZ009-010-201915-
/O.EXB.KMSO.SN.Y.0006.080120T1200Z-080121T0000Z/
WESTERN LEMHI COUNTY-EASTERN LEMHI COUNTY-
453 AM MST SUN JAN 20 2008

...SNOW ADVISORY IN EFFECT UNTIL 5 PM MST THIS AFTERNOON...

THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A SNOW
ADVISORY...WHICH IS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON. 

TOTAL SNOWFALL ACCUMULATIONS OF 2 TO 5 INCHES IN THE VALLEYS AND
PASSES WITH UP TO 10 INCHES IN THE MOUNTAINS CAN BE EXPECTED
THROUGH EARLY SUNDAY EVENING. LIGHT SNOWFALL WILL BECOME MODERATE
DURING THE MORNING HOURS. EXPECT DIFFICULT DRIVING CONDITIONS
ACROSS LOST TRAIL PASS TODAY.

A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY
TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND
LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING.

$$

IDZ007-008-201915-
/O.EXT.KMSO.SB.Y.0004.000000T0000Z-080121T0000Z/
OROFINO/GRANGEVILLE REGION-LOWER HELLS CANYON/SALMON RIVER REGION-
353 AM PST SUN JAN 20 2008

...SNOW AND BLOWING SNOW ADVISORY NOW IN EFFECT UNTIL 4 PM PST
THIS AFTERNOON...

THE SNOW AND BLOWING SNOW ADVISORY IS NOW IN EFFECT UNTIL 4 PM
PST THIS AFTERNOON. 

SNOW WILL INTENSIFY DURING THE MORNING HOURS AS LOW PRESSURE
MOVES SOUTH THROUGH IDAHO. TOTAL SNOWFALL ACCUMULATIONS OF 3 TO 7
INCHES CAN BE EXPECTED BY SUNDAY AFTERNOON...ESPECIALLY FROM
OROFINO SOUTHWARD TO GRANGEVILLE. NORTH TO NORTHEAST WINDS OF 10
TO 20 MPH WITH GUSTS TO 30 MPH ARE EXPECTED TODAY CREATING AREAS
OF BLOWING AND DRIFTING SNOW. ADDITIONAL AREAS AFFECTED WILL BE
HIGHWAY 12 OVER WHITEBIRD GRADE WHERE DRIVING CONDITIONS COULD
BECOME HAZARDOUS.

A SNOW AND BLOWING SNOW ADVISORY MEANS THAT VISIBILITIES WILL BE
LIMITED DUE TO A COMBINATION OF FALLING AND BLOWING SNOW. USE
CAUTION WHEN TRAVELING...ESPECIALLY IN OPEN AREAS.

$$

IDZ005-006-MTZ006-201915-
/O.EXT.KMSO.SN.Y.0006.000000T0000Z-080121T0000Z/
NORTHERN CLEARWATER MOUNTAINS-SOUTHERN CLEARWATER MOUNTAINS-
BITTERROOT/SAPPHIRE MOUNTAINS-
453 AM MST SUN JAN 20 2008 /353 AM PST SUN JAN 20 2008/

...SNOW ADVISORY NOW IN EFFECT UNTIL 5 PM MST /4 PM PST/ THIS
AFTERNOON...

THE SNOW ADVISORY IS NOW IN EFFECT UNTIL 5 PM MST /4 PM PST/ THIS
AFTERNOON. 

TOTAL SNOWFALL ACCUMULATIONS OF 4 TO 7 INCHES IN THE VALLEYS AND
PASSES WITH UP TO 12 INCHES IN THE MOUNTAINS CAN BE EXPECTED
SUNDAY. LIGHT TO MODERATE WILL CONTINUE OVER THE NORTHERN
CLEARWATER MOUNTAINS...THE HIGHWAY 12 CORRIDOR INCLUDING LOLO PASS
THROUGHOUT THE DAY SUNDAY. 

A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY
TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND
LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING.

$$

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MISSOULA MT
1237 AM MST SUN JAN 20 2008

.UPDATE....HAVE UPGRADED PREVIOUSLY ISSUED ADVISORIES FOR THE
BUTTE/BLACKFOOT...LOWER CLARK FORK AND THE KOOTENAI/CABINET
REGIONS. THEY ARE NOW WINTER STORM WARNINGS. HAVE ALSO UPGRADED
ADVISORIES TO BLIZZARD WARNINGS FOR A PORTION OF THE MISSOULA
VALLEY AND THE SOUTHERN PORTIONS OF THE SEELEY LAKE REGION.
ADJUSTMENTS TO SNOW AMOUNTS WERE ALSO MADE TO ACCOMMODATE THE
WARNINGS.

&&

.DISCUSSION...THE DEFORMATION ZONE PREVIOUSLY DESCRIBED IS
PERSISTING ACROSS NORTHWEST MONTANA. AS THE UPPER LEVEL LOW DROPS
FURTHER SOUTH INTO OREGON THIS AREA OF LIFTING WILL BECOME FURTHER
ENHANCED CONTINUING MODERATE TO HEAVY SNOWFALL THROUGHOUT THE
NIGHT AS AIR IS LIFTED OVER THE APROACHING ARCTIC BOUNDARY.
SPOTTER AND POLICE REPORTS OF TREES DOWN ON HOMES ALONG WITH DOT
REPORTS OF EMERGENCY TRAVEL ONLY HAVE PROMPTED THE ISSUANCE OF A
BLIZZARD WARNING SPECIFICALLY FOR NORTHERN MISSOULA VALLEY...I-90
FROM RESERVE STREET EAST TO HELGATE CANYON AND THEN ALONG MONTANA
HIGHWAY 200 FROM BONNER TO CLEARWATER JUNCTION. AS ARCTIC AIR
CONTINUES TO STREAM THROUGH THIS VALLEY...STRONG AND GUSTY WINDS
WILL PRODUCE BLIZZARD CONDITIONS OVERNIGHT ACROSS THESE LOCATIONS.

&&

.AVIATION...A STRONG ARCTIC SYSTEM CONTINUES TO MOVES IN FROM THE
NORTH RESULTING IN WIDESPREAD MODERATE AND OCCATIONALLY HEAVY
SNOWFALL. VERY STRONG WINDS WILL BE ASSOCIATED WITH THIS COLD
AIRMASS AS IT PUSHES OVER THE CONTINENTAL DIVIDE. EXPECT THESE
WINDS TO CONTINUE AFFECTING TERMINALS AND FLIGHT ROUTES OVERNIGHT
THROUGH MUCH OF SUNDAY WITH WIDESPREAD BLOWING AND DRIFTING OF
SNOW.

&&

.PREV DISCUSSION... /ISSUED 913 PM MST SAT JAN 19 2008/

UPDATE...HAVE UPGRADED THE WINTER WEATHER ADVISORY FOR THE
FLATHEAD/MISSION VALLEY TO A WINTER STORM WARNING. HAVE ADJUSTED
MOST WEATHER ELEMENTS OF THE FORECAST TO BETTER ACCOUNT CURRENT
AND EXPECTED CONDITIONS.

DISCUSSION...THE ARCTIC AIR HAS SPILLED OVER THE CONTINENTAL
DIVIDE AT MARIAS PASS AND FILTERED ITS WAY INTO THE NORTHERN
FLATHEAD VALLEY THIS EVENING. SPOTTER REPORTS...KGPI OBSERVATIONS
AND DOT ROAD REPORTS CONFIRM WIDESPREAD HORIZONTAL SNOWFALL WHICH
IS CAUSING REDUCED VISIBILITY AND LOCAL WHITE OUT CONDITIONS. THIS
PRECIPITATION IS THE RESULT OF A RELATIVELY WARM...MOIST AIRMASS
BEING LIFTED OVER THE APPROACHING ARCTIC BOUNDARY AND THEN
DIVERGING...OR BEING PULLED A PART...THROUGH ITS ASCENT
(DEFORMATION). THIS EFFECT CAN CLEARLY BE SEEN IN THE LAST 2
HOURS OF INFRARED SATELLITE IMAGERY. ALL INDICATIONS SUGGEST THIS
FORCING WILL CONTINUE THROUGH THE NIGHT...GRADUALLY SHIFTING
SOUTHWARD AS THE UPPER LEVEL LOW IN WASHINGTON MOVES SOUTH. THUS
HAVE DECIDED TO UPGRADE THE WINTER WEATHER ADVISORY FOR THE
FLATHEAD/MISSION VALLEYS TO A WINTER STORM WARNING. THIS IS A VERY
DANGEROUS SITUATION AS STRONG AND GUSTY WINDS WILL COMBINE WITH
SNOWFALL TO PRODUCE AREAS OF WHITE OUT CONDITIONS.

I HAVE CHOSEN TO LEAVE THE REMAINING WINTER WEATHER HIGHLIGHTS
UNCHANGED FOR THE MOMENT. HOWEVER...FURTHER UPDATES MAY BECOME
NECESSARY AS THE DEFORMATION ZONE MOVES SOUTH ACROSS WESTERN
MONTANA.

ALTHOUGH SNOW HAS NOT YET BEGUN TO POSE A MAJOR HAZARD ACROSS THE
OROFINO AND GRANGEVILLE AREAS...THE APPROACHING COLD FRONT WILL
MOVE THROUGH THE REGION OVERNIGHT RESULTING IN A MARKED INCREASE
IN SNOWFALL AND WIND.

PREV DISCUSSION... /ISSUED 255 PM MST SAT JAN 19 2008/

DISCUSSION...AN UPPER LEVEL LOW PRESSURE TROUGH STARTED MOVING INLAND
TO THE PACIFIC NORTHWEST THIS MORNING. THIS SYSTEM IS EXPECTED TO
MAKE ITS WAY OVER THE NORTHERN ROCKIES TONIGHT AND
TOMORROW...BRINGING COLD AIR...WIND AND SNOW TO CENTRAL IDAHO AND
WESTERN MONTANA. THE ONSET OF THE STORM WILL MAKE FOR HAZARDOUS
WINTER WEATHER AND A SERIES OF WINTER WEATHER ADVISORIES AND
WARNINGS HAVE BEEN ISSUED. PLEASE SEE GTFWSWMSO FOR DETAILS. AS
THE SNOW BEGINS TO DECREASE SUNDAY AFTERNOON...STRONG WINDS AND
LOW TEMPERATURES WILL CONTINUE CREATING LOW WIND CHILLS THROUGH
MUCH OF THE WESTERN GREAT DIVIDE. THIS INCLUDES THE BITTERROOT AND
SAPPHIRE MOUNTAINS...AND MISSOULA AND FLATHEAD VALLEYS. HAZARDOUS
WIND CHILL VALUES ARE EXPECTED TO CONTINUE IN THESE AREAS INTO
MONDAY AFTERNOON.

A DRYING NORTHERLY FLOW WILL DEVELOP MONDAY NIGHT. WITH THE
MODIFIED ARCTIC AIR MASS IN PLACE AND GOOD RADIATIONAL COOLING
UNDER THE CLEARING SKIES...WE SHOULD SEE OUR COLDEST MORNING OF
THE SEASON THUS FAR TUESDAY. ON THE BRIGHT SIDE...THE PRESSURE
GRADIENT WILL SLACKEN SIGNIFICANTLY BY THEN RESULTING IN CALM TO
VERY LIGHT WINDS. THEREFORE...WIND CHILL WILL NO LONGER BE AN
ISSUE. NEVERTHELESS...KIDS ARE IN FOR A COLD BUS STOP WAIT THAT
MORNING WITH TEMPERATURES WELL BELOW ZERO COMMON IN MONTANA AND
LEMHI COUNTY IDAHO. AREAS IN AND AROUND BUTTE COULD BE NEAR 30
BELOW TUESDAY MORNING. NORTH CENTRAL IDAHO WILL NOT GET QUITE AS
COLD WITH TEMPERATURES IN THE SINGLE DIGITS TO NEAR ZERO.

A DISTURBANCE DROPPING INTO CENTRAL MONTANA TUESDAY AND TUESDAY
NIGHT WILL INCREASE CLOUDS AND MAYBE EVEN PRODUCE LIGHT SNOW AT
TIMES ALONG THE DIVIDE. ELSEWHERE SKIES WILL ONLY SEE PARTLY
CLOUDY SKIES AT TIMES ALLOWING THE AIR MASS TO REMAIN COLD AND
SOME FOG TO FORM IN THE VALLEYS. THE NEXT DISTURBANCE WILL MOVE
INTO NORTHWEST MONTANA LATE THURSDAY AND MAINTAIN AN ACTIVE AND
MOIST FLOW OVER THE NORTHERN ROCKIES THROUGH SATURDAY. HAVE RAISED
PRECIPITATION CHANCES AND SLOWLY WARMED TEMPERATURES THROUGH THIS
PERIOD.

&&

.MSO WATCHES/WARNINGS/ADVISORIES...
MT...WINTER STORM WARNING UNTIL 11 AM MST THIS MORNING FOR
     BUTTE/BLACKFOOT REGION.

     WIND CHILL ADVISORY FROM 11 AM THIS MORNING TO 5 PM MST MONDAY
     FOR BUTTE/BLACKFOOT REGION-POTOMAC/SEELEY LAKE REGION.

     SNOW ADVISORY UNTIL 11 AM MST THIS MORNING FOR
     BITTERROOT/SAPPHIRE MOUNTAINS.

     WINTER STORM WARNING UNTIL 11 AM MST THIS MORNING FOR
     KOOTENAI/CABINET REGION-LOWER CLARK FORK REGION.

     BLIZZARD WARNING UNTIL 11 AM MST THIS MORNING FOR THE
     MISSOULA/BITTERROOT VALLEYS-POTOMAC/SEELEY LAKE REGION.

     WINTER STORM WARNING UNTIL 5 AM MST EARLY THIS MORNING FOR
     FLATHEAD/MISSION VALLEYS.

     WINTER STORM WARNING UNTIL 5 AM MST EARLY THIS MORNING FOR WEST
     GLACIER REGION.

     WIND CHILL ADVISORY FROM 5 AM EARLY THIS MORNING TO 5 PM MST
     MONDAY FOR WEST GLACIER REGION.

ID...SNOW ADVISORY UNTIL 10 AM PST SUNDAY FOR NORTHERN CLEARWATER
     MOUNTAINS-SOUTHERN CLEARWATER MOUNTAINS.

     SNOW AND BLOWING SNOW ADVISORY UNTIL 10 AM PST SUNDAY FOR LOWER
     HELLS CANYON/SALMON RIVER REGION-OROFINO/GRANGEVILLE REGION.

&&

SHORT TERM...DICKERSON
LONG TERM....WHITMORE
AVIATION...DICKERSON

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE MISSOULA MT
233 PM MST SAT JAN 19 2008

MTZ006-201200-
BITTERROOT/SAPPHIRE MOUNTAINS-
233 PM MST SAT JAN 19 2008

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

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

.DAY ONE...THIS AFTERNOON AND TONIGHT

A STRONG ARCTIC SYSTEM WILL PUSH INTO THE AREA TONIGHT BRINGING
HAZARDOUS WEATHER ACROSS WESTERN MONTANA. SEE WEATHER.GOV/MISSOULA
FOR SPECIFIC HIGHLIGHT INFORMATION.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

A COLD FRONT WILL PUSH THROUGH SUNDAY CONTINUING THE WIDESPREAD SNOW
THROUGH THE DAY. SNOW IS EXPECTED TO TAPER OFF BY NIGHTFALL.
ALTHOUGH VALLEYS MAY BE SHELTERED...STRONG WINDS AND VERY COLD
TEMPERATURES BEHIND THE FRONT WILL RESULT IN DANGEROUS WIND CHILLS
TO 20 BELOW ZERO SUNDAY NIGHT AND MONDAY.

.SPOTTER INFORMATION STATEMENT...

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

MTZ005-201200-
MISSOULA/BITTERROOT VALLEYS-
233 PM MST SAT JAN 19 2008

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

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

.DAY ONE...THIS AFTERNOON AND TONIGHT

A STRONG ARCTIC SYSTEM WILL PUSH INTO THE AREA TONIGHT BRINGING
HAZARDOUS WEATHER ACROSS WESTERN MONTANA. SEE WEATHER.GOV/MISSOULA
FOR SPECIFIC HIGHLIGHT INFORMATION.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

A COLD FRONT WILL PUSH THROUGH SUNDAY CONTINUING THE WIDESPREAD SNOW
THROUGH THE DAY. SNOW IS EXPECTED TO TAPER OFF BY NIGHTFALL. STRONG
WINDS AND VERY COLD TEMPERATURES BEHIND THE FRONT WILL RESULT IN DANGEROUS
WIND CHILLS TO 15 BELOW ZERO SUNDAY NIGHT AND MONDAY.

.SPOTTER INFORMATION STATEMENT...

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

MTZ001-004-201200-
KOOTENAI/CABINET REGION-LOWER CLARK FORK REGION-
233 PM MST SAT JAN 19 2008

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

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

.DAY ONE...THIS AFTERNOON AND TONIGHT

A STRONG ARCTIC SYSTEM WILL PUSH INTO THE AREA TONIGHT BRINGING
HAZARDOUS WEATHER ACROSS WESTERN MONTANA. SEE
WEATHER.GOV/MISSOULA FOR SPECIFIC HIGHLIGHT INFORMATION.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

A COLD FRONT WILL PUSH THROUGH SUNDAY CONTINUING THE WIDESPREAD SNOW
THROUGH THE DAY. SNOW IS EXPECTED TO TAPER OFF BY NIGHTFALL. STRONG
WINDS AND VERY COLD TEMPERATURES BEHIND THE FRONT WILL RESULT IN DANGEROUS
WIND CHILLS TO 10 BELOW ZERO SUNDAY NIGHT AND MONDAY...ESPECIALLY NEAR
RIDGE TOPS WHICH ARE UNSHELTERED FROM THESE WINDS.

.SPOTTER INFORMATION STATEMENT...

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

MTZ003-201200-
FLATHEAD/MISSION VALLEYS-
233 PM MST SAT JAN 19 2008

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...THIS AFTERNOON AND TONIGHT

A STRONG ARCTIC SYSTEM WILL PUSH INTO THE AREA TONIGHT BRINGING
HAZARDOUS WEATHER ACROSS WESTERN MONTANA. SEE WEATHER.GOV/MISSOULA
FOR SPECIFIC HIGHLIGHT INFORMATION.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

A COLD FRONT WILL PUSH THROUGH SUNDAY CONTINUING THE WIDESPREAD SNOW
THROUGH THE DAY. SNOW IS EXPECTED TO TAPER OFF BY SUNDAY AFTERNOON. STRONG
WINDS AND VERY COLD TEMPERATURES BEHIND THE FRONT WILL RESULT IN DANGEROUS
WIND CHILLS TO 20 BELOW ZERO SUNDAY NIGHT AND MONDAY...ESPECIALLY
THROUGH THE FLATHEAD VALLEY. WINDS MAY BRING FROZEN SPRAY AND
PROBLEMS TO THE SOUTHERN FLATHEAD LAKE MOORED BOATS AND DOCKS.

.SPOTTER INFORMATION STATEMENT...

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

IDZ009-010-201200-
WESTERN LEMHI COUNTY-EASTERN LEMHI COUNTY-
233 PM MST SAT JAN 19 2008

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

.DAY ONE...THIS AFTERNOON AND TONIGHT

A STRONG ARCTIC SYSTEM WILL PUSH INTO THE AREA OVERNIGHT BRINGING
WIDESPREAD SNOW ACROSS NORTH CENTRAL IDAHO.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

A COLD FRONT WILL PUSH THROUGH SUNDAY CONTINUING THE WIDESPREAD
LIGHT SNOW THROUGH THE DAY. SNOW IS EXPECTED TO TAPER OFF BY LATE
SUNDAY NIGHT. STRONG WINDS AND VERY COLD TEMPERATURES BEHIND THE
FRONT WILL RESULT IN DANGEROUS WIND CHILLS 10 TO 20 BELOW ZERO
IN PLACES SUNDAY NIGHT AND MONDAY...ESPECIALLY NEAR RIDGE TOPS
WHICH ARE UNSHELTERED FROM THESE WINDS.

.SPOTTER INFORMATION STATEMENT...

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