Alert archive / Montana / Winter Weather Advisories in 2012
Winter Weather Advisory 21, NWS Missoula, MT
NWS Missoula, MT issued this winter weather advisory at Mar 5, 2012, 12:30 PM PST for Clearwater County, Idaho County, Idaho; 10 counties in Montana. It took effect at Mar 5, 2012, 4:00 PM PST. It was in force for 19 hr.
The area
The counties it named.
The facts
- Issued
- Mar 5, 2012, 12:30 PM PST (20:30 UTC)
- In effect from
- Mar 5, 2012, 4:00 PM PST
- Expired
- Mar 6, 2012, 11:00 AM PST
- In force
- 19 hr
- Issued by
- NWS Missoula, MT
Counties Clearwater County, ID, Idaho County, ID, Deer Lodge County, MT, Flathead County, MT, Granite County, MT, Lake County, MT, Mineral County, MT, Missoula County, MT, Powell County, MT, Ravalli County, MT, Sanders County, MT, Silver Bow County, MT
The radar
The Missoula radar (KMSX), 29 km from the middle of the area, began a volume at 20:34 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Spokane, WA (KOTX), launched 12:00Z, 8.5 hours before the alert went out and 198 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1772 m above ground
- 0-6 km bulk shear
- 59 kt
- 0-1 km storm-relative helicity
- 180 m²/s²
- 0-3 km storm-relative helicity
- 236 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
344 WWUS45 KMSO 052030 WSWMSO URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE MISSOULA MT 130 PM MST MON MAR 5 2012 ...COLD FRONT WILL BRING GUSTY WINDS AND SNOW TO PARTS OF THE NORTHERN ROCKIES TONIGHT... IDZ006-MTZ006-061200- /O.NEW.KMSO.WW.Y.0021.120306T0300Z-120306T1800Z/ SOUTHERN CLEARWATER MOUNTAINS-BITTERROOT/SAPPHIRE MOUNTAINS- 130 PM MST MON MAR 5 2012 /1230 PM PST MON MAR 5 2012/ ...WINTER WEATHER ADVISORY IN EFFECT FROM 8 PM MST /7 PM PST/ THIS EVENING TO 11 AM MST /10 AM PST/ TUESDAY... THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A WINTER WEATHER ADVISORY FOR SNOW AND BLOWING SNOW...WHICH IS IN EFFECT FROM 8 PM MST /7 PM PST/ THIS EVENING TO 11 AM MST /10 AM PST/ TUESDAY. * IMPACTS/TIMING: A COLD FRONT WILL PASS THROUGH THE AREA TONIGHT BRINGING WITH IT PERIODS OF SNOWFALL...WHICH AT TIMES MAY BE MODERATE TO HEAVY. DRAMATIC REDUCTIONS IN VISIBILITY ARE LIKELY AS THE FRONT PASSES AND WINDS ARE STRONGEST. BEHIND THE FRONT SNOW LEVELS WILL DROP QUICKLY WITH SNOW ACCUMULATING ON ALL SURFACES...INCLUDING AREA ROADWAYS...BY EARLY TUESDAY MORNING. * SNOW ACCUMULATIONS: 2 TO 4 INCHES IN THE VALLEY LOCATIONS SUCH AS LOWELL...POWELL AND SULA. LOCALLY 5 TO 7 INCHES IN PLACES LIKE DIXIE...ELK CITY...OVER LOLO PASS. HIGHER AMOUNTS ARE EXPECTED IN BACK COUNTRY OF THE BITTERROOT AND CLEARWATER MOUNTAINS. * WIND SPEEDS: 15 TO 25 MPH WITH GUSTS UP TO 40 MPH ALONG THE COLD FRONT. * LOCATIONS IMPACTED INCLUDE...DIXIE...ELK CITY...HIGHWAY 12 LOWELL TO LOLO PASS...HIGHWAY 93 SULA TO LOST TRAIL PASS... LOLO PASS PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ MTZ002-061200- /O.NEW.KMSO.WW.Y.0021.120306T0000Z-120306T1500Z/ WEST GLACIER REGION- 130 PM MST MON MAR 5 2012 ...WINTER WEATHER ADVISORY IN EFFECT FROM 5 PM THIS AFTERNOON TO 8 AM MST TUESDAY... THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A WINTER WEATHER ADVISORY FOR SNOW AND BLOWING SNOW...WHICH IS IN EFFECT FROM 5 PM THIS AFTERNOON TO 8 AM MST TUESDAY. * IMPACTS/TIMING: A COLD FRONT WILL BRING GUSTY WINDS AND ACCUMULATING SNOWFALL TO THE REGION OVERNIGHT. BEHIND THE FRONT THE SNOW LEVEL WILL QUICKLY DROP AND THE ATMOSPHERE COOL...ALLOWING SNOW TO EVENTUALLY ACCUMULATE ON ALL SURFACES INCLUDING AREA ROADWAYS. A PERIOD OF DRAMATICALLY REDUCED VISIBILITY ARE POSSIBLE ALONG THE DIRECTLY BEHIND THE COLD FRONT AND UNDER STRONGER SHOWERS OVERNIGHT. SOME DRIFTING OF SNOW MAY BE POSSIBLE THIS EVENING OVER MARIAS PASS. * SNOW ACCUMULATIONS: GENERALLY 3 TO 5 INCHES OF SNOW ARE EXPECTED IN VALLEYS WITH 5 TO 7 INCHES ALONG US-2 FROM ESSEX TO MARIAS PASS. * WIND SPEEDS: 15 TO 25 MPH WITH GUSTS TO 35 MPH. * LOCATIONS IMPACTED INCLUDE...BAD ROCK CANYON...ESSEX...HIGHWAY 83 BIGFORK TO SWAN LAKE...MARIAS PASS...POLEBRIDGE PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ IDZ005-061200- /O.NEW.KMSO.WW.Y.0021.120306T0300Z-120306T1500Z/ NORTHERN CLEARWATER MOUNTAINS- 1230 PM PST MON MAR 5 2012 ...WINTER WEATHER ADVISORY IN EFFECT FROM 7 PM THIS EVENING TO 7 AM PST TUESDAY ABOVE 3000 FEET... THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A WINTER WEATHER ADVISORY FOR ACCUMULATING SNOWFALL ABOVE 3000 FEET... WHICH IS IN EFFECT FROM 7 PM THIS EVENING TO 7 AM PST TUESDAY. * IMPACTS/TIMING: A COLD FRONT WILL BRING A PERIOD OF BRIEFLY MODERATE TO HEAVY SNOWFALL THIS EVENING...FOLLOWED BY PERSISTENT MODERATE SNOW SHOWERS THROUGH MUCH OF THE NIGHT. ACCUMULATING SNOWFALL IS EXPECTED ON ALL SURFACES...INCLUDING AREA ROADWAYS. * SNOW ACCUMULATIONS: FOR LOCATIONS 3000 FEET AND ABOVE...3 TO 6 INCHES OF SNOW. HIGHER AMOUNTS LIKELY IN THE BACK COUNTRY. BELOW 3000 FEET... LOCALLY UP TO 1.5 INCHES ACCUMULATION. * LOCATIONS IMPACTED INCLUDE...HIGHWAY 11 PIERCE TO HEADQUARTERS...PIERCE PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ IDZ008-061200- /O.NEW.KMSO.WW.Y.0021.120306T0300Z-120306T1500Z/ LOWER HELLS CANYON/SALMON RIVER REGION- 1230 PM PST MON MAR 5 2012 ...WINTER WEATHER ADVISORY IN EFFECT FROM 7 PM THIS EVENING TO 7 AM PST TUESDAY FOR WHITE BIRD GRADE... THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A WINTER WEATHER ADVISORY FOR SNOW AND BLOWING SNOW FOR WHITE BIRD GRADE...WHICH IS IN EFFECT FROM 7 PM THIS EVENING TO 7 AM PST TUESDAY. * IMPACTS/TIMING: A COLD FRONT WILL BRING A PERIOD OF MODERATE TO HEAVY SNOWFALL TONIGHT RESULTING IN RAPID REDUCTIONS IN VISIBILITY AND ACCUMULATING SNOWFALL ON THE ROADWAY. BEHIND THE FRONT SNOW SHOWERS WILL CAUSE PERIODIC REDUCTIONS VISIBILITY AND QUICK SNOWFALL ACCUMULATIONS ON THE ROAD. * SNOW ACCUMULATIONS: 3 TO 5 INCHES OF SNOW ARE EXPECTED. * WIND SPEEDS: 25 TO 35 MPH WITH GUSTS TO 45 MPH THIS EVENING ALONG THE FRONT. AFTER THE FRONTAL PASSAGE SOME SHOWERS MAY PRODUCE BRIEF GUSTS TO 30 MPH. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...BLOWING SNOW...OR ICE ACCUMULATIONS WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$
6 follow-up statements
561 WWUS45 KMSO 060104 WSWMSO URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE MISSOULA MT 604 PM MST MON MAR 5 2012 ...COLD FRONT WILL BRING GUSTY WINDS AND SNOW TO PARTS OF THE NORTHERN ROCKIES TONIGHT... MTZ004-060915- /O.EXA.KMSO.WW.Y.0021.000000T0000Z-120306T1500Z/ LOWER CLARK FORK REGION- 604 PM MST MON MAR 5 2012 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 8 AM MST TUESDAY FOR I-90 LOOKOUT PASS TO HAUGAN... THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A WINTER WEATHER ADVISORY FOR HAZARDOUS DRIVING CONDITIONS FOR I-90 LOOKOUT PASS TO HAUGAN...WHICH IS IN EFFECT UNTIL 8 AM MST TUESDAY. * IMPACTS/TIMING: SNOW AND BLOWING SNOW WILL BE DEVELOP THIS EVENING...CREATING HAZARDOUS DRIVING CONDITIONS OVER LOOKOUT PASS THROUGH TUESDAY MORNING. * SNOW ACCUMULATIONS: 4 TO 6 INCHES OVER LOOKOUT PASS...1 TO 3 INCHES AT LOWER ELEVATIONS EAST TO HAUGAN. * WIND SPEEDS: 15 TO 25 MPH WITH GUSTS TO 35 MPH. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ IDZ006-MTZ006-060915- /O.CON.KMSO.WW.Y.0021.120306T0300Z-120306T1800Z/ SOUTHERN CLEARWATER MOUNTAINS-BITTERROOT/SAPPHIRE MOUNTAINS- 604 PM MST MON MAR 5 2012 /504 PM PST MON MAR 5 2012/ ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST /10 AM PST/ TUESDAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST /10 AM PST/ TUESDAY. * IMPACTS/TIMING: A COLD FRONT WILL PASS THROUGH THE AREA TONIGHT BRINGING WITH IT PERIODS OF SNOWFALL...WHICH AT TIMES MAY BE MODERATE TO HEAVY. DRAMATIC REDUCTIONS IN VISIBILITY ARE LIKELY AS THE FRONT PASSES AND WINDS ARE STRONGEST. BEHIND THE FRONT SNOW LEVELS WILL DROP QUICKLY WITH SNOW ACCUMULATING ON ALL SURFACES...INCLUDING AREA ROADWAYS...BY EARLY TUESDAY MORNING. * SNOW ACCUMULATIONS: 2 TO 4 INCHES IN THE VALLEY LOCATIONS SUCH AS LOWELL...POWELL AND SULA. LOCALLY 5 TO 7 INCHES IN PLACES LIKE DIXIE...ELK CITY...OVER LOLO PASS. HIGHER AMOUNTS ARE EXPECTED IN BACK COUNTRY OF THE BITTERROOT AND CLEARWATER MOUNTAINS. * WIND SPEEDS: 15 TO 25 MPH WITH GUSTS UP TO 40 MPH ALONG THE COLD FRONT. * LOCATIONS IMPACTED INCLUDE...DIXIE...ELK CITY...HIGHWAY 12 LOWELL TO LOLO PASS...HIGHWAY 93 SULA TO LOST TRAIL PASS... LOLO PASS PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ MTZ002-060915- /O.CON.KMSO.WW.Y.0021.000000T0000Z-120306T1500Z/ WEST GLACIER REGION- 604 PM MST MON MAR 5 2012 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 8 AM MST TUESDAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 8 AM MST TUESDAY. * IMPACTS/TIMING: A COLD FRONT WILL BRING GUSTY WINDS AND ACCUMULATING SNOWFALL TO THE REGION OVERNIGHT. BEHIND THE FRONT THE SNOW LEVEL WILL QUICKLY DROP AND THE ATMOSPHERE COOL... ALLOWING SNOW TO EVENTUALLY ACCUMULATE ON ALL SURFACES INCLUDING AREA ROADWAYS. A PERIOD OF DRAMATICALLY REDUCED VISIBILITY ARE POSSIBLE ALONG THE DIRECTLY BEHIND THE COLD FRONT AND UNDER STRONGER SHOWERS OVERNIGHT. SOME DRIFTING OF SNOW MAY BE POSSIBLE THIS EVENING OVER MARIAS PASS. * SNOW ACCUMULATIONS: GENERALLY 3 TO 5 INCHES OF SNOW ARE EXPECTED IN VALLEYS WITH 5 TO 7 INCHES ALONG US-2 FROM ESSEX TO MARIAS PASS. * WIND SPEEDS: 15 TO 25 MPH WITH GUSTS TO 35 MPH. * LOCATIONS IMPACTED INCLUDE...BAD ROCK CANYON...ESSEX...HIGHWAY 83 BIGFORK TO SWAN LAKE...MARIAS PASS...POLEBRIDGE PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ IDZ005-060915- /O.CON.KMSO.WW.Y.0021.120306T0300Z-120306T1500Z/ NORTHERN CLEARWATER MOUNTAINS- 504 PM PST MON MAR 5 2012 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 7 AM PST TUESDAY ABOVE 3000 FEET... A WINTER WEATHER ADVISORY ABOVE 3000 FEET REMAINS IN EFFECT UNTIL 7 AM PST TUESDAY. * IMPACTS/TIMING: A COLD FRONT WILL BRING A PERIOD OF BRIEFLY MODERATE TO HEAVY SNOWFALL THIS EVENING...FOLLOWED BY PERSISTENT MODERATE SNOW SHOWERS THROUGH MUCH OF THE NIGHT. ACCUMULATING SNOWFALL IS EXPECTED ON ALL SURFACES...INCLUDING AREA ROADWAYS. * SNOW ACCUMULATIONS: FOR LOCATIONS 3000 FEET AND ABOVE...3 TO 6 INCHES OF SNOW. HIGHER AMOUNTS LIKELY IN THE BACK COUNTRY. BELOW 3000 FEET... LOCALLY UP TO 1.5 INCHES ACCUMULATION. * LOCATIONS IMPACTED INCLUDE...HIGHWAY 11 PIERCE TO HEADQUARTERS...PIERCE PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ IDZ008-060915- /O.CON.KMSO.WW.Y.0021.120306T0300Z-120306T1500Z/ LOWER HELLS CANYON/SALMON RIVER REGION- 504 PM PST MON MAR 5 2012 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 7 AM PST TUESDAY FOR WHITE BIRD GRADE... A WINTER WEATHER ADVISORY FOR WHITE BIRD GRADE REMAINS IN EFFECT UNTIL 7 AM PST TUESDAY. * IMPACTS/TIMING: A COLD FRONT WILL BRING A PERIOD OF MODERATE TO HEAVY SNOWFALL TONIGHT RESULTING IN RAPID REDUCTIONS IN VISIBILITY AND ACCUMULATING SNOWFALL ON THE ROADWAY. BEHIND THE FRONT SNOW SHOWERS WILL CAUSE PERIODIC REDUCTIONS VISIBILITY AND QUICK SNOWFALL ACCUMULATIONS ON THE ROAD. * SNOW ACCUMULATIONS: 3 TO 5 INCHES OF SNOW ARE EXPECTED. * WIND SPEEDS: 25 TO 35 MPH WITH GUSTS TO 45 MPH THIS EVENING ALONG THE FRONT. AFTER THE FRONTAL PASSAGE SOME SHOWERS MAY PRODUCE BRIEF GUSTS TO 30 MPH. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...BLOWING SNOW...OR ICE ACCUMULATIONS WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$
308 WWUS45 KMSO 060744 WSWMSO URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE MISSOULA MT 1244 AM MST TUE MAR 6 2012 ...COLD FRONT WILL BRING GUSTY WINDS AND SNOW TO PARTS OF THE NORTHERN ROCKIES TONIGHT... IDZ006-MTZ006-061200- /O.CON.KMSO.WW.Y.0021.000000T0000Z-120306T1800Z/ SOUTHERN CLEARWATER MOUNTAINS-BITTERROOT/SAPPHIRE MOUNTAINS- 1244 AM MST TUE MAR 6 2012 /1144 PM PST MON MAR 5 2012/ ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST /10 AM PST/ THIS MORNING... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST /10 AM PST/ THIS MORNING. * IMPACTS/TIMING: A COLD FRONT WILL PASS THROUGH THE AREA TONIGHT BRINGING WITH IT PERIODS OF SNOWFALL...WHICH AT TIMES MAY BE MODERATE TO HEAVY. DRAMATIC REDUCTIONS IN VISIBILITY ARE LIKELY AS THE FRONT PASSES AND WINDS ARE STRONGEST. BEHIND THE FRONT SNOW LEVELS WILL DROP QUICKLY WITH SNOW ACCUMULATING ON ALL SURFACES...INCLUDING AREA ROADWAYS...BY EARLY TUESDAY MORNING. * SNOW ACCUMULATIONS: 2 TO 4 INCHES IN THE VALLEY LOCATIONS SUCH AS LOWELL...POWELL AND SULA. LOCALLY 5 TO 7 INCHES IN PLACES LIKE DIXIE...ELK CITY...OVER LOLO PASS. HIGHER AMOUNTS ARE EXPECTED IN BACK COUNTRY OF THE BITTERROOT AND CLEARWATER MOUNTAINS. * WIND SPEEDS: 15 TO 25 MPH WITH GUSTS UP TO 40 MPH ALONG THE COLD FRONT. * LOCATIONS IMPACTED INCLUDE...DIXIE...ELK CITY...HIGHWAY 12 LOWELL TO LOLO PASS...HIGHWAY 93 SULA TO LOST TRAIL PASS... LOLO PASS PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ MTZ002-061200- /O.CON.KMSO.WW.Y.0021.000000T0000Z-120306T1500Z/ WEST GLACIER REGION- 1244 AM MST TUE MAR 6 2012 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 8 AM MST THIS MORNING... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 8 AM MST THIS MORNING. * IMPACTS/TIMING: A COLD FRONT WILL BRING GUSTY WINDS AND ACCUMULATING SNOWFALL TO THE REGION OVERNIGHT. BEHIND THE FRONT THE SNOW LEVEL WILL QUICKLY DROP AND THE ATMOSPHERE COOL... ALLOWING SNOW TO EVENTUALLY ACCUMULATE ON ALL SURFACES INCLUDING AREA ROADWAYS. A PERIOD OF DRAMATICALLY REDUCED VISIBILITY ARE POSSIBLE ALONG THE DIRECTLY BEHIND THE COLD FRONT AND UNDER STRONGER SHOWERS OVERNIGHT. SOME DRIFTING OF SNOW MAY BE POSSIBLE THIS EVENING OVER MARIAS PASS. * SNOW ACCUMULATIONS: GENERALLY 3 TO 5 INCHES OF SNOW ARE EXPECTED IN VALLEYS WITH 5 TO 7 INCHES ALONG US-2 FROM ESSEX TO MARIAS PASS. * WIND SPEEDS: 15 TO 25 MPH WITH GUSTS TO 35 MPH. * LOCATIONS IMPACTED INCLUDE...BAD ROCK CANYON...ESSEX...HIGHWAY 83 BIGFORK TO SWAN LAKE...MARIAS PASS...POLEBRIDGE PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ IDZ005-061200- /O.CON.KMSO.WW.Y.0021.000000T0000Z-120306T1500Z/ NORTHERN CLEARWATER MOUNTAINS- 1144 PM PST MON MAR 5 2012 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 7 AM PST TUESDAY ABOVE 3000 FEET... A WINTER WEATHER ADVISORY ABOVE 3000 FEET REMAINS IN EFFECT UNTIL 7 AM PST TUESDAY. * IMPACTS/TIMING: A COLD FRONT WILL BRING A PERIOD OF BRIEFLY MODERATE TO HEAVY SNOWFALL THIS EVENING...FOLLOWED BY PERSISTENT MODERATE SNOW SHOWERS THROUGH MUCH OF THE NIGHT. ACCUMULATING SNOWFALL IS EXPECTED ON ALL SURFACES...INCLUDING AREA ROADWAYS. * SNOW ACCUMULATIONS: FOR LOCATIONS 3000 FEET AND ABOVE...3 TO 6 INCHES OF SNOW. HIGHER AMOUNTS LIKELY IN THE BACK COUNTRY. BELOW 3000 FEET... LOCALLY UP TO 1.5 INCHES ACCUMULATION. * LOCATIONS IMPACTED INCLUDE...HIGHWAY 11 PIERCE TO HEADQUARTERS...PIERCE PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ IDZ008-061200- /O.CON.KMSO.WW.Y.0021.000000T0000Z-120306T1500Z/ LOWER HELLS CANYON/SALMON RIVER REGION- 1144 PM PST MON MAR 5 2012 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 7 AM PST TUESDAY FOR WHITE BIRD GRADE... A WINTER WEATHER ADVISORY FOR WHITE BIRD GRADE REMAINS IN EFFECT UNTIL 7 AM PST TUESDAY. * IMPACTS/TIMING: A COLD FRONT WILL BRING A PERIOD OF MODERATE TO HEAVY SNOWFALL TONIGHT RESULTING IN RAPID REDUCTIONS IN VISIBILITY AND ACCUMULATING SNOWFALL ON THE ROADWAY. BEHIND THE FRONT SNOW SHOWERS WILL CAUSE PERIODIC REDUCTIONS VISIBILITY AND QUICK SNOWFALL ACCUMULATIONS ON THE ROAD. * SNOW ACCUMULATIONS: 3 TO 5 INCHES OF SNOW ARE EXPECTED. * WIND SPEEDS: 25 TO 35 MPH WITH GUSTS TO 45 MPH THIS EVENING ALONG THE FRONT. AFTER THE FRONTAL PASSAGE SOME SHOWERS MAY PRODUCE BRIEF GUSTS TO 30 MPH. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...BLOWING SNOW...OR ICE ACCUMULATIONS WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ MTZ004-061200- /O.CON.KMSO.WW.Y.0021.000000T0000Z-120306T1500Z/ LOWER CLARK FORK REGION- 1244 AM MST TUE MAR 6 2012 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 8 AM MST THIS MORNING FOR I-90 LOOKOUT PASS TO HAUGAN... A WINTER WEATHER ADVISORY FOR I-90 LOOKOUT PASS TO HAUGAN REMAINS IN EFFECT UNTIL 8 AM MST THIS MORNING. * IMPACTS/TIMING: SNOW AND BLOWING SNOW WILL BE DEVELOP THIS EVENING...CREATING HAZARDOUS DRIVING CONDITIONS OVER LOOKOUT PASS THROUGH TUESDAY MORNING. * SNOW ACCUMULATIONS: 4 TO 6 INCHES OVER LOOKOUT PASS...1 TO 3 INCHES AT LOWER ELEVATIONS EAST TO HAUGAN. * WIND SPEEDS: 15 TO 25 MPH WITH GUSTS TO 35 MPH. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$
979 WWUS45 KMSO 061130 WSWMSO URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE MISSOULA MT 430 AM MST TUE MAR 6 2012 ...COLD FRONT WILL BRING GUSTY WINDS AND SNOW TO PARTS OF THE NORTHERN ROCKIES TONIGHT... MTZ007-061500- /O.EXA.KMSO.WW.Y.0021.000000T0000Z-120306T1500Z/ BUTTE/BLACKFOOT REGION- 430 AM MST TUE MAR 6 2012 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 8 AM MST THIS MORNING... THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A WINTER WEATHER ADVISORY FOR SNOW...WHICH IS IN EFFECT UNTIL 8 AM MST THIS MORNING. * IMPACTS/TIMING: SNOW AND BLOWING SNOW THIS MORNING...CREATING HAZARDOUS DRIVING CONDITIONS ESPECIALLY IN THE VICINITY OF BUTTE. * SNOW ACCUMULATIONS: 1 TO 2 INCHES. * WIND SPEEDS: 10 TO 20 MPH WITH GUSTS TO 30 MPH. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ IDZ006-MTZ006-061500- /O.EXT.KMSO.WW.Y.0021.000000T0000Z-120306T1500Z/ SOUTHERN CLEARWATER MOUNTAINS-BITTERROOT/SAPPHIRE MOUNTAINS- 430 AM MST TUE MAR 6 2012 /330 AM PST TUE MAR 6 2012/ ...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 8 AM MST /7 AM PST/ THIS MORNING... THE WINTER WEATHER ADVISORY IS NOW IN EFFECT UNTIL 8 AM MST /7 AM PST/ THIS MORNING. * IMPACTS/TIMING: PERIODS OF SNOWFALL AND ALREADY SNOW COVERED ROADS PRODUCING HAZARDOUS DRIVING CONDITIONS THIS MORNING. * SNOW ACCUMULATIONS: AN ADDITIONAL 1 TO 2 INCHES OVER LOST TRAIL AND LOLO PASSES. * WIND SPEEDS: 10 TO 20 MPH. * LOCATIONS IMPACTED INCLUDE...DIXIE...ELK CITY...HIGHWAY 12 LOWELL TO LOLO PASS...HIGHWAY 93 SULA TO LOST TRAIL PASS... LOLO PASS PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ MTZ002-061500- /O.CON.KMSO.WW.Y.0021.000000T0000Z-120306T1500Z/ WEST GLACIER REGION- 430 AM MST TUE MAR 6 2012 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 8 AM MST THIS MORNING... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 8 AM MST THIS MORNING. * IMPACTS/TIMING: PERIODS OF SNOW AND NEWLY SNOW COVERED ROADS WILL PRODUCE HAZARDOUS DRIVING CONDITIONS FOR THE MORNING COMMUTE. * SNOW ACCUMULATIONS: AN ADDITIONAL 1 TO 2 INCHES OVER MARIAS PASS. * WIND SPEEDS: 10 TO 20 MPH. * LOCATIONS IMPACTED INCLUDE...BAD ROCK CANYON...ESSEX...HIGHWAY 83 BIGFORK TO SWAN LAKE...MARIAS PASS...POLEBRIDGE PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ IDZ005-061500- /O.CON.KMSO.WW.Y.0021.000000T0000Z-120306T1500Z/ NORTHERN CLEARWATER MOUNTAINS- 330 AM PST TUE MAR 6 2012 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 7 AM PST THIS MORNING ABOVE 3000 FEET... A WINTER WEATHER ADVISORY ABOVE 3000 FEET REMAINS IN EFFECT UNTIL 7 AM PST THIS MORNING. * IMPACTS/TIMING: PERSISTENT SNOW SHOWERS AND NEWLY ACCUMULATING SNOWS PRODUCING DIFFICULT TRAVEL FOR THE MORNING COMMUTE. * SNOW ACCUMULATIONS: NEW ACCUMULATIONS UP TO AN INCH. * LOCATIONS IMPACTED INCLUDE...HIGHWAY 11 PIERCE TO HEADQUARTERS...PIERCE. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ IDZ008-061500- /O.CON.KMSO.WW.Y.0021.000000T0000Z-120306T1500Z/ LOWER HELLS CANYON/SALMON RIVER REGION- 330 AM PST TUE MAR 6 2012 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 7 AM PST THIS MORNING FOR WHITE BIRD GRADE... A WINTER WEATHER ADVISORY FOR WHITE BIRD GRADE REMAINS IN EFFECT UNTIL 7 AM PST THIS MORNING. * IMPACTS/TIMING: SNOW SHOWERS AND RECENT ACCUMULATING SNOWS WILL PRODUCE DIFFICULT TRAVEL FOR THE MORNING COMMUTE. * SNOW ACCUMULATIONS: ADDITIONAL ACCUMULATIONS UP TO AN INCH * WIND SPEEDS: 10 TO 20 MPH WITH GUSTS TO 25 MPH. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...BLOWING SNOW...OR ICE ACCUMULATIONS WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ MTZ004-061500- /O.CON.KMSO.WW.Y.0021.000000T0000Z-120306T1500Z/ LOWER CLARK FORK REGION- 430 AM MST TUE MAR 6 2012 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 8 AM MST THIS MORNING FOR I-90 LOOKOUT PASS TO HAUGAN... A WINTER WEATHER ADVISORY FOR I-90 LOOKOUT PASS TO HAUGAN REMAINS IN EFFECT UNTIL 8 AM MST THIS MORNING. * IMPACTS/TIMING: SNOW SHOWERS AND RECENT ACCUMULATIONS WILL PRODUCE HAZARDOUS TRAVEL THIS MORNING. * SNOW ACCUMULATIONS: AN ADDITIONAL 1 TO 2 INCHES. * WIND SPEEDS: 10 TO 20 MPH. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$
370 WWUS45 KMSO 061152 WSWMSO URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE MISSOULA MT 452 AM MST TUE MAR 6 2012 ...COLD FRONT WILL BRING GUSTY WINDS AND SNOW TO PARTS OF THE NORTHERN ROCKIES TONIGHT... IDZ006-MTZ006-061600- /O.EXT.KMSO.WW.Y.0021.000000T0000Z-120306T1600Z/ SOUTHERN CLEARWATER MOUNTAINS-BITTERROOT/SAPPHIRE MOUNTAINS- 452 AM MST TUE MAR 6 2012 /352 AM PST TUE MAR 6 2012/ ...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 9 AM MST /8 AM PST/ THIS MORNING... THE WINTER WEATHER ADVISORY IS NOW IN EFFECT UNTIL 9 AM MST /8 AM PST/ THIS MORNING. * IMPACTS/TIMING: PERIODS OF SNOWFALL AND ALREADY SNOW COVERED ROADS PRODUCING HAZARDOUS DRIVING CONDITIONS THIS MORNING. * SNOW ACCUMULATIONS: AN ADDITIONAL 1 TO 2 INCHES OVER LOST TRAIL AND LOLO PASSES. * WIND SPEEDS: 10 TO 20 MPH. * LOCATIONS IMPACTED INCLUDE...DIXIE...ELK CITY...HIGHWAY 12 LOWELL TO LOLO PASS...HIGHWAY 93 SULA TO LOST TRAIL PASS... LOLO PASS PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ MTZ002-061600- /O.EXT.KMSO.WW.Y.0021.000000T0000Z-120306T1600Z/ WEST GLACIER REGION- 452 AM MST TUE MAR 6 2012 ...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 9 AM MST THIS MORNING... THE WINTER WEATHER ADVISORY IS NOW IN EFFECT UNTIL 9 AM MST THIS MORNING. * IMPACTS/TIMING: PERIODS OF SNOW AND NEWLY SNOW COVERED ROADS WILL PRODUCE HAZARDOUS DRIVING CONDITIONS FOR THE MORNING COMMUTE. * SNOW ACCUMULATIONS: AN ADDITIONAL 1 TO 2 INCHES OVER MARIAS PASS. * WIND SPEEDS: 10 TO 20 MPH. * LOCATIONS IMPACTED INCLUDE...BAD ROCK CANYON...ESSEX...HIGHWAY 83 BIGFORK TO SWAN LAKE...MARIAS PASS...POLEBRIDGE PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ MTZ007-061600- /O.EXT.KMSO.WW.Y.0021.000000T0000Z-120306T1600Z/ BUTTE/BLACKFOOT REGION- 452 AM MST TUE MAR 6 2012 ...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 9 AM MST THIS MORNING... THE WINTER WEATHER ADVISORY IS NOW IN EFFECT UNTIL 9 AM MST THIS MORNING. * IMPACTS/TIMING: SNOW AND BLOWING SNOW THIS MORNING...CREATING HAZARDOUS DRIVING CONDITIONS ESPECIALLY IN THE VICINITY OF BUTTE. * SNOW ACCUMULATIONS: 1 TO 2 INCHES. * WIND SPEEDS: 10 TO 20 MPH WITH GUSTS TO 30 MPH. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ IDZ005-061600- /O.EXT.KMSO.WW.Y.0021.000000T0000Z-120306T1600Z/ NORTHERN CLEARWATER MOUNTAINS- 352 AM PST TUE MAR 6 2012 ...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 8 AM PST THIS MORNING ABOVE 3000 FEET... THE WINTER WEATHER ADVISORY ABOVE 3000 FEET IS NOW IN EFFECT UNTIL 8 AM PST THIS MORNING. * IMPACTS/TIMING: PERSISTENT SNOW SHOWERS AND NEWLY ACCUMULATING SNOWS PRODUCING DIFFICULT TRAVEL FOR THE MORNING COMMUTE. * SNOW ACCUMULATIONS: NEW ACCUMULATIONS UP TO AN INCH. * LOCATIONS IMPACTED INCLUDE...HIGHWAY 11 PIERCE TO HEADQUARTERS...PIERCE PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ IDZ008-061600- /O.EXT.KMSO.WW.Y.0021.000000T0000Z-120306T1600Z/ LOWER HELLS CANYON/SALMON RIVER REGION- 352 AM PST TUE MAR 6 2012 ...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 8 AM PST THIS MORNING FOR WHITE BIRD GRADE... THE WINTER WEATHER ADVISORY FOR WHITE BIRD GRADE IS NOW IN EFFECT UNTIL 8 AM PST THIS MORNING. * IMPACTS/TIMING: SNOW SHOWERS AND RECENT ACCUMULATING SNOWS WILL PRODUCE DIFFICULT TRAVEL FOR THE MORNING COMMUTE. * SNOW ACCUMULATIONS: ADDITIONAL ACCUMULATIONS UP TO AN INCH OVER WHITE BIRD GRADE. * WIND SPEEDS: 10 TO 20 MPH WITH GUSTS TO 25 MPH. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...BLOWING SNOW...OR ICE ACCUMULATIONS WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ MTZ004-061600- /O.EXT.KMSO.WW.Y.0021.000000T0000Z-120306T1600Z/ LOWER CLARK FORK REGION- 452 AM MST TUE MAR 6 2012 ...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 9 AM MST THIS MORNING FOR I-90 LOOKOUT PASS TO HAUGAN... THE WINTER WEATHER ADVISORY FOR I-90 LOOKOUT PASS TO HAUGAN IS NOW IN EFFECT UNTIL 9 AM MST THIS MORNING. * IMPACTS/TIMING: SNOW SHOWERS AND RECENT ACCUMULATIONS WILL PRODUCE HAZARDOUS TRAVEL THIS MORNING. * SNOW ACCUMULATIONS: AN ADDITIONAL 1 TO 2 INCHES. * WIND SPEEDS: 10 TO 20 MPH. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$
054 WWUS45 KMSO 061558 WSWMSO URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE MISSOULA MT 858 AM MST TUE MAR 6 2012 IDZ005-006-008-MTZ002-004-006-061700- /O.CAN.KMSO.WW.Y.0021.000000T0000Z-120306T1600Z/ NORTHERN CLEARWATER MOUNTAINS-SOUTHERN CLEARWATER MOUNTAINS- LOWER HELLS CANYON/SALMON RIVER REGION-WEST GLACIER REGION- LOWER CLARK FORK REGION-BITTERROOT/SAPPHIRE MOUNTAINS- 858 AM MST TUE MAR 6 2012 /758 AM PST TUE MAR 6 2012/ ...WINTER WEATHER ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN MISSOULA HAS CANCELLED THE WINTER WEATHER ADVISORY. SCATTERED SNOW SHOWERS WILL PERSIST THROUGH MUCH OF THE DAY. BUT ADDITIONAL ACCUMULATIONS ARE EXPECTED TO BE MINIMAL AND ON THE ORDER OF A QUARTER TO HALF AN INCH WITH EACH PASSING SHOWER. $$ MTZ007-061900- /O.EXT.KMSO.WW.Y.0021.000000T0000Z-120306T1900Z/ BUTTE/BLACKFOOT REGION- 858 AM MST TUE MAR 6 2012 ...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL NOON MST TODAY... THE WINTER WEATHER ADVISORY IS NOW IN EFFECT UNTIL NOON MST TODAY. * IMPACTS/TIMING: SNOW AND BLOWING SNOW THIS MORNING...CREATING HAZARDOUS DRIVING CONDITIONS ESPECIALLY OVER MACDONALD PASS. * SNOW ACCUMULATIONS: AN ADDITIONAL INCH IS POSSIBLE THROUGH THE NOON HOUR...ESPECIALLY OVER THE HIGHER TERRAIN. * WIND SPEEDS: 10 TO 15 MPH WITH GUSTS TO 25 MPH. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$
656 WWUS45 KMSO 061857 WSWMSO URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE MISSOULA MT 1157 AM MST TUE MAR 6 2012 MTZ007-062000- /O.EXP.KMSO.WW.Y.0021.000000T0000Z-120306T1900Z/ BUTTE/BLACKFOOT REGION- 1157 AM MST TUE MAR 6 2012 ...WINTER WEATHER ADVISORY WILL EXPIRE AT NOON MST TODAY... SNOW SHOWERS WILL CONTINUE ACROSS THE AREA UNTIL SHORTLY AFTER SUNSET. HOWEVER ADDITIONAL ACCUMULATIONS WILL BEAR MINIMAL IMPACTS AND THUS THE WINTER WEATHER ADVISORY WILL EXPIRE AT NOON MST TODAY. $$
What forecasters said that day
The local office's own words before this winter weather advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Missoula, MT wrote its last area forecast discussion before this winter weather advisory went out at Mar 5, 5:18 AM PST, 7 hours 12 minutes earlier.
Area forecast discussion, Mar 5, 5:18 AM PST, 7 hours 12 minutes before
AREA FORECAST DISCUSSION...CORRECTED NATIONAL WEATHER SERVICE MISSOULA MT 618 AM MST MON MAR 5 2012 ...GUSTY SOUTHERLY WINDS IN WESTERN MONTANA THIS AFTERNOON... ...STRONG COLD FRONTAL PASSAGE MONDAY EVENING THROUGH TUESDAY MORNING... ...2-5 INCHES OF SNOW OVER MOUNTAIN PASSES MONDAY NIGHT... .DISCUSSION...CLOUDS ARE STARTING TO INCREASE IN NORTHWEST MONTANA AHEAD OF AN APPROACHING COLD FRONT. ELSEWHERE LIGHT SOUTH WINDS ARE HELPING TO KEEP TEMPERATURES RELATIVELY WARM. TODAY'S TEMPERATURES WILL BE WARM ONCE AGAIN SIMILAR TO SUNDAY'S WEATHER. PRESSURE GRADIENTS WILL TIGHTEN OR INCREASE LATER THIS AFTERNOON AS THE COLD FRONT GETS CLOSER TO THE REGION. THE RESULT WILL BE INCREASING GUSTY SOUTHERLY WINDS. THE STRONGEST GUSTS IN THE 30 MPH RANGE ARE EXPECTED IN THE BITTERROOT VALLEY AND I-90 FROM DRUMMOND TO BUTTE. COLD FRONTAL PASSAGE IS EXPECTED TO OCCUR BETWEEN LATE MONDAY EVENING THROUGH TUESDAY MORNING. THE MAIN IMPACT WILL BE LIGHT TO MODERATE SNOW ACCUMULATIONS OVER MARIAS...LOOKOUT...AND LOLO PASSES. TEMPERATURES WILL BE WARM ENOUGH TO PRODUCE ALL RAIN IN THE VALLEYS UNTIL COLDER AIR BEHIND THE FRONT SETTLES IN TUESDAY. WIND WITH SNOW WILL PRODUCE LOWERING VISIBILITIES AT TIMES. TEMPERATURES WILL COOL SIGNIFICANTLY TUESDAY BEHIND THE FRONTAL PASSAGE. WHILE THE MAIN PRECIP BAND WILL MOVE EAST OF THE AREA ALONG THE FRONT... ENOUGH INSTABILITY AND COLD AIR BEHIND THE FRONT WILL BE FAVORABLE FOR SCATTERED TO NUMEROUS AFTERNOON SNOW SHOWERS TUESDAY. NORTHWEST FLOW WILL PERSIST THROUGH WEDNESDAY...THOUGH ANY MOISTURE POSSIBLE WILL BE LIMITED AND CONFINED TO THE HIGHER ELEVATIONS ALONG THE CONTINENTAL DIVIDE AND GLACIER NP. A RIDGE OF HIGH PRESSURE BEGINS TO BUILD OVER THE REGION WEDNESDAY. NEAR NORMAL TEMPERATURES ARE EXPECTED ON TUESDAY AND WEDNESDAY. THURSDAY THROUGH MONDAY...HIGH PRESSURE WILL BE AROUND FOR THE END OF THE WEEK AND AT LEAST THE FIRST PART OF THE WEEKEND. TEMPERATURES DURING THIS PERIOD WILL BE AROUND NORMAL AND LIKELY ABOVE NORMAL ON FRIDAY. TOWARD THE END OF THE WEEKEND THE RIDGE WILL BEGIN TO BREAK DOWN ALLOWING THE NEXT SYSTEM TO MOVE IN...POSSIBLY SUNDAY OR MONDAY. HOWEVER THERE IS A LOT OF VARIABILITY IN THE MODELS REGARDING WHEN THE NEXT STORM SYSTEM DOES BEGIN TO AFFECT THE AREA...THEREFORE CONFIDENCE IS LOW DUE TO TIMING ISSUES AT THIS TIME. && .AVIATION...MID TO HIGH LEVEL CLOUDS HAVE BEGUN TO MOVE INTO WESTERN MONTANA AND NORTH CENTRAL IDAHO OVERNIGHT AHEAD OF THE NEXT SYSTEM. CLOUDS WILL BE ON THE INCREASE AND BEGIN TO LOWER AS THE DAY GOES ON. STRONG GUSTY SOUTH WESTERLY WINDS ARE ALSO EXPECTED ALONG THE FRONT AND AVIATION SITES CAN EXPECT TO START SEEING THE WINDS AROUND 05/21Z...WITH KGPI STARTING AT 05/19Z. LIGHT TO MODERATE SNOW SHOWERS AT TIMES WITH THE FRONT WILL CAUSE REDUCED VISIBILITY AND CEILINGS. MOUNTAIN OBSCURATIONS CAN BE EXPECT AS WELL STARTING THIS EVENING AND LASTING THROUGH TUESDAY MORNING. && .MSO WATCHES/WARNINGS/ADVISORIES... MT...NONE. ID...NONE. && SHORT TERM...RPN LONG TERM....ROBINSON/RPN AVIATION...ROBINSON/RPN
Nearby
Winter Weather Advisories in Montana, 2012Winter Weather Advisories in Idaho, 2012Every winter weather advisory in 2012
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.