Alert archive / Montana / Winter Storm Warnings in 2009
Winter Storm Warning 19, NWS Missoula, MT
NWS Missoula, MT issued this winter storm warning at Oct 26, 2009, 3:59 AM MDT for 8 counties in Montana; Clearwater County, Idaho County, Idaho. It took effect at Oct 26, 2009, 12:00 PM MDT. It was in force for 24 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Oct 26, 2009, 3:59 AM MDT (09:59 UTC)
- In effect from
- Oct 26, 2009, 12:00 PM MDT
- Expired
- Oct 27, 2009, 11:40 AM MDT
- In force
- 24 hr
- Issued by
- NWS Missoula, MT
Counties Clearwater County, ID, Idaho County, ID, Flathead County, MT, Granite County, MT, Lake County, MT, Mineral County, MT, Missoula County, MT, Powell County, MT, Ravalli County, MT, Sanders County, MT
The radar
The Missoula radar (KMSX), 31 km from the middle of the area, began a volume at 09:58 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 00:00Z, 10.0 hours before the alert went out and 173 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
- 1268 m above ground
- 0-6 km bulk shear
- 58 kt
- 0-1 km storm-relative helicity
- 77 m²/s²
- 0-3 km storm-relative helicity
- 229 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WWUS45 KMSO 260959 WSWMSO URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE MISSOULA MT 359 AM MDT MON OCT 26 2009 ...MOUNTAIN SNOW ALONG WITH INCREASED WINDS WILL IMPACT THE NORTHERN ROCKIES STARTING TODAY AND CONTINUING THROUGH TUESDAY... .A MOIST AND STRONG PACIFIC WEATHER SYSTEM WILL MOVE INTO THE NORTHERN ROCKIES THIS MORNING. AS THE SYSTEM PASSES ACCUMULATING SNOW IS EXPECTED...MAINLY IN THE HIGHER TERRAIN OF WESTERN MONTANA AND NORTH CENTRAL IDAHO. IN ADDITION TO SNOW... WINDS WILL INCREASE THROUGH MONDAY CREATING POTENTIALLY HAZARDOUS CONDITIONS DUE TO SNOW AND BLOWING SNOW. IN ADDITION...THE EVOLUTION OF THE WEATHER PATTERN FAVORS ACCUMULATING SNOW IN THE CAMAS PRAIRIE AREA...INCLUDING GRANGEVILLE AND WHITE BIRD SUMMIT TUESDAY. AFTER THE COLD FRONT PASSES MONDAY NIGHT...COOLER MOIST AIR WILL BE USHERED IN BY A NORTHERLY WIND FLOW ACROSS NORTH CENTRAL IDAHO. THIS FLOW FAVORS PRECIPITATION ENHANCEMENT AS IT IS LOCALLY FORCED UP THE TERRAIN. IDZ007-008-261800- /O.UPG.KMSO.WS.A.0012.091027T1200Z-091028T0300Z/ /O.NEW.KMSO.WS.W.0019.091027T1200Z-091028T0300Z/ OROFINO/GRANGEVILLE REGION-LOWER HELLS CANYON/SALMON RIVER REGION- 259 AM PDT MON OCT 26 2009 ...WINTER STORM WARNING IN EFFECT FROM 5 AM TO 8 PM PDT TUESDAY ABOVE 3000 FEET... THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A WINTER STORM WARNING FOR HEAVY SNOW ABOVE 3000 FEET...WHICH IS IN EFFECT FROM 5 AM TO 8 PM PDT TUESDAY. THE WINTER STORM WATCH IS NO LONGER IN EFFECT. RAIN WILL BE CHANGING OVER TO SNOW BY TUESDAY MORNING AS THE MOIST ATMOSPHERE COOLS UNDER THE INFLUENCE OF A NORTHERLY FLOW. THIS NORTHERLY FLOW FAVORS ENHANCEMENT OVER THE FOOTHILLS AND PLATEAUS OF NORTH CENTRAL IDAHO...INCLUDING THE GRANGEVILLE AREA AND WHITE BIRD SUMMIT. NEW SNOW ACCUMULATIONS OF 4 TO 8 INCHES ARE POSSIBLE BY TUESDAY EVENING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING MEANS SIGNIFICANT AMOUNTS OF SNOW... BLOWING SNOW...OR FREEZING RAIN ARE EXPECTED OR OCCURRING. STRONG WINDS AND DANGEROUS WIND CHILLS ARE ALSO POSSIBLE. THIS WILL MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE. && $$ IDZ006-MTZ006-261800- /O.UPG.KMSO.WS.A.0012.091026T1800Z-091028T0300Z/ /O.NEW.KMSO.WS.W.0019.091026T1800Z-091028T0300Z/ SOUTHERN CLEARWATER MOUNTAINS-BITTERROOT/SAPPHIRE MOUNTAINS- 359 AM MDT MON OCT 26 2009 /259 AM PDT MON OCT 26 2009/ ...WINTER STORM WARNING IN EFFECT FROM NOON MDT /11 AM PDT/ TODAY TO 9 PM MDT /8 PM PDT/ TUESDAY ABOVE 4500 FEET... THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A WINTER STORM WARNING FOR SNOW AND BLOWING SNOW ABOVE 4500 FEET...WHICH IS IN EFFECT FROM NOON MDT /11 AM PDT/ TODAY TO 9 PM MDT /8 PM PDT/ TUESDAY. THE WINTER STORM WATCH IS NO LONGER IN EFFECT. SNOW WILL BEGIN TO FALL TODAY BUT THE MAIN SNOW ACCUMULATIONS WILL BEGIN THIS EVENING. WIND WILL ACCOMPANY THE SNOW WITH SNOW AND BLOWING SNOW BECOMING THE MAIN IMPACT OF THIS SYSTEM. MOUNTAIN SNOW ACCUMULATIONS OF UP TO 12 INCHES ARE POSSIBLE BY TUESDAY EVENING. MOUNTAIN PASSES INCLUDING LOLO AND LOST TRAIL WILL EXPERIENCE WIND AND SNOW ACCUMULATIONS AS WELL. HUNTERS AND TRAVELERS SHOULD BE PREPARED FOR SIGNIFICANT SNOW ACCUMULATIONS ACCOMPANIED WITH GUSTY WINDS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING MEANS SIGNIFICANT AMOUNTS OF SNOW... BLOWING SNOW...OR FREEZING RAIN ARE EXPECTED OR OCCURRING. STRONG WINDS AND DANGEROUS WIND CHILLS ARE ALSO POSSIBLE. THIS WILL MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE. && $$ IDZ005-MTZ002-004-043-261800- /O.UPG.KMSO.WS.A.0012.091026T1800Z-091027T1800Z/ /O.NEW.KMSO.WS.W.0019.091026T1800Z-091027T1800Z/ NORTHERN CLEARWATER MOUNTAINS-WEST GLACIER REGION- LOWER CLARK FORK REGION-POTOMAC/SEELEY LAKE REGION- 359 AM MDT MON OCT 26 2009 /259 AM PDT MON OCT 26 2009/ ...WINTER STORM WARNING IN EFFECT FROM NOON MDT /11 AM PDT/ TODAY TO NOON MDT /11 AM PDT/ TUESDAY ABOVE 4500 FEET... THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A WINTER STORM WARNING FOR SNOW AND BLOWING SNOW ABOVE 4500 FEET...WHICH IS IN EFFECT FROM NOON MDT /11 AM PDT/ TODAY TO NOON MDT /11 AM PDT/ TUESDAY. THE WINTER STORM WATCH IS NO LONGER IN EFFECT. SNOW WILL BEGIN TO FALL THIS MORNING BUT THE MAIN SNOW ACCUMULATIONS WILL BEGIN AFTER NOON MDT. WIND WILL ACCOMPANY THE SNOW WITH SNOW AND BLOWING SNOW BECOMING THE MAIN IMPACT OF THIS SYSTEM. MOUNTAIN SNOW ACCUMULATIONS OF UP TO 10 INCHES ARE POSSIBLE BY TUESDAY MORNING. MOUNTAIN PASSES INCLUDING MARIAS AND LOOKOUT WILL EXPERIENCE WIND AND SNOW ACCUMULATIONS AS WELL. HUNTERS AND TRAVELERS SHOULD BE PREPARED FOR SIGNIFICANT SNOW ACCUMULATIONS ACCOMPANIED WITH GUSTY WINDS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING MEANS SIGNIFICANT AMOUNTS OF SNOW... BLOWING SNOW...OR FREEZING RAIN ARE EXPECTED OR OCCURRING. STRONG WINDS AND DANGEROUS WIND CHILLS ARE ALSO POSSIBLE. THIS WILL MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE. && $$ IDZ010-261800- /O.UPG.KMSO.WS.A.0012.091027T0000Z-091028T0300Z/ /O.NEW.KMSO.WW.Y.0061.091027T0000Z-091028T0000Z/ EASTERN LEMHI COUNTY- 359 AM MDT MON OCT 26 2009 ...WINTER WEATHER ADVISORY IN EFFECT FROM 6 PM THIS EVENING TO 6 PM MDT TUESDAY ABOVE 5000 FEET... THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A WINTER WEATHER ADVISORY FOR SNOW AND BLOWING SNOW ABOVE 5000 FEET... WHICH IS IN EFFECT FROM 6 PM THIS EVENING TO 6 PM MDT TUESDAY. THE WINTER STORM WATCH IS NO LONGER IN EFFECT. SNOW WILL BEGIN TO FALL LATE THIS AFTERNOON BUT THE MAIN SNOW ACCUMULATIONS WILL BEGIN IN THE EVENING. WIND WILL ACCOMPANY THE SNOW WITH SNOW AND BLOWING SNOW BECOMING THE MAIN IMPACT OF THIS SYSTEM. MOUNTAIN SNOW ACCUMULATIONS OF 4 TO 7 INCHES ARE POSSIBLE BY TUESDAY EVENING. MOUNTAIN PASSES INCLUDING LOST TRAIL AND BANNOCK WILL EXPERIENCE WIND AND SNOW ACCUMULATIONS AS WELL. HUNTERS AND TRAVELERS SHOULD BE PREPARED FOR SIGNIFICANT SNOW ACCUMULATIONS ACCOMPANIED WITH GUSTY WINDS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...BLOWING SNOW...OR FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$
5 follow-up statements
000 WWUS45 KMSO 261749 WSWMSO URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE MISSOULA MT 1149 AM MDT MON OCT 26 2009 ...MOUNTAIN SNOW ALONG WITH INCREASED WINDS WILL IMPACT THE NORTHERN ROCKIES STARTING THIS AFTERNOON AND CONTINUING THROUGH TUESDAY... .A MOIST AND STRONG PACIFIC WEATHER SYSTEM WILL MOVE INTO THE NORTHERN ROCKIES. AS THE SYSTEM PASSES ACCUMULATING SNOW IS EXPECTED...MAINLY IN THE HIGHER TERRAIN OF WESTERN MONTANA AND NORTH CENTRAL IDAHO. WINDS WILL INCREASE AND CREATE POTENTIALLY HAZARDOUS CONDITIONS DUE TO SNOW AND BLOWING SNOW. IN ADDITION...THE EVOLUTION OF THE WEATHER PATTERN FAVORS ACCUMULATING SNOW IN THE CAMAS PRAIRIE AREA...INCLUDING WHITE BIRD SUMMIT TUESDAY. AFTER THE COLD FRONT PASSES TONIGHT...COOLER MOIST AIR WILL BE USHERED IN BY A NORTHERLY WIND FLOW ACROSS NORTH CENTRAL IDAHO. THIS FLOW FAVORS PRECIPITATION ENHANCEMENT AS IT IS LOCALLY FORCED UP THE TERRAIN. IDZ007-008-270300- /O.CON.KMSO.WS.W.0019.091027T1200Z-091028T0300Z/ OROFINO/GRANGEVILLE REGION-LOWER HELLS CANYON/SALMON RIVER REGION- 1049 AM PDT MON OCT 26 2009 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 5 AM TO 8 PM PDT TUESDAY ABOVE 4000 FEET INCLUDING THE WHITE BIRD GRADE... A WINTER STORM WARNING ABOVE 4000 FEET REMAINS IN EFFECT FROM 5 AM TO 8 PM PDT TUESDAY. SNOW AND BLOWING SNOW WILL CREATE HAZARDOUS TRAVEL OVER WHITEBIRD GRADE TUESDAY. RAIN WILL BE CHANGING OVER TO SNOW BY TUESDAY MORNING AS THE MOIST ATMOSPHERE COOLS UNDER THE INFLUENCE OF A NORTHERLY FLOW. THIS NORTHERLY FLOW FAVORS ENHANCEMENT OVER THE FOOTHILLS AND PLATEAUS OF NORTH CENTRAL IDAHO. NEW SNOW ACCUMULATIONS OF 5 TO 8 INCHES ARE POSSIBLE BY TUESDAY EVENING OVER WHITEBIRD GRADE AND 3 TO 5 INCHES IN THE GRANGEVILLE AREA. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING MEANS SIGNIFICANT AMOUNTS OF SNOW... BLOWING SNOW...OR FREEZING RAIN ARE EXPECTED OR OCCURRING. STRONG WINDS AND DANGEROUS WIND CHILLS ARE ALSO POSSIBLE. THIS WILL MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE. && $$ IDZ006-MTZ006-270300- /O.CON.KMSO.WS.W.0019.091026T1800Z-091028T0300Z/ SOUTHERN CLEARWATER MOUNTAINS-BITTERROOT/SAPPHIRE MOUNTAINS- 1149 AM MDT MON OCT 26 2009 /1049 AM PDT MON OCT 26 2009/ ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 9 PM MDT /8 PM PDT/ TUESDAY ABOVE 4500 FEET... A WINTER STORM WARNING ABOVE 4500 FEET REMAINS IN EFFECT UNTIL 9 PM MDT /8 PM PDT/ TUESDAY. SNOW WILL BEGIN TO FALL THIS AFTERNOON BUT THE MAIN SNOW ACCUMULATIONS WILL BEGIN THIS EVENING. WIND WILL ACCOMPANY THE SNOW...WITH SNOW AND BLOWING SNOW BECOMING THE MAIN IMPACT OF THIS SYSTEM. MOUNTAIN SNOW ACCUMULATIONS OF UP TO 12 INCHES ARE POSSIBLE BY TUESDAY EVENING. MOUNTAIN PASSES INCLUDING LOLO AND LOST TRAIL WILL EXPERIENCE WIND AND SNOW ACCUMULATIONS AS WELL. HUNTERS AND TRAVELERS SHOULD BE PREPARED FOR SIGNIFICANT SNOW ACCUMULATIONS ACCOMPANIED BY GUSTY WINDS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING MEANS SIGNIFICANT AMOUNTS OF SNOW... BLOWING SNOW...OR FREEZING RAIN ARE EXPECTED OR OCCURRING. STRONG WINDS AND DANGEROUS WIND CHILLS ARE ALSO POSSIBLE. THIS WILL MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE. && $$ IDZ005-MTZ002-004-043-270300- /O.CON.KMSO.WS.W.0019.091026T1800Z-091027T1800Z/ NORTHERN CLEARWATER MOUNTAINS-WEST GLACIER REGION- LOWER CLARK FORK REGION-POTOMAC/SEELEY LAKE REGION- 1149 AM MDT MON OCT 26 2009 /1049 AM PDT MON OCT 26 2009/ ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON MDT /11 AM PDT/ TUESDAY ABOVE 4500 FEET... A WINTER STORM WARNING ABOVE 4500 FEET REMAINS IN EFFECT UNTIL NOON MDT /11 AM PDT/ TUESDAY. SNOW WILL BEGIN TO FALL THIS AFTERNOON. WIND WILL ACCOMPANY THE SNOW...WITH SNOW AND BLOWING SNOW BECOMING THE MAIN IMPACT OF THIS SYSTEM. MOUNTAIN SNOW ACCUMULATIONS OF UP TO 10 INCHES ARE POSSIBLE BY TUESDAY MORNING. MOUNTAIN PASSES INCLUDING MARIAS AND LOOKOUT WILL EXPERIENCE WIND AND SNOW ACCUMULATIONS AS WELL. HUNTERS AND TRAVELERS SHOULD BE PREPARED FOR SIGNIFICANT SNOW ACCUMULATIONS ACCOMPANIED BY GUSTY WINDS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING MEANS SIGNIFICANT AMOUNTS OF SNOW... BLOWING SNOW...OR FREEZING RAIN ARE EXPECTED OR OCCURRING. STRONG WINDS AND DANGEROUS WIND CHILLS ARE ALSO POSSIBLE. THIS WILL MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE. && $$ IDZ010-270300- /O.CON.KMSO.WW.Y.0061.091027T0000Z-091028T0000Z/ EASTERN LEMHI COUNTY- 1149 AM MDT MON OCT 26 2009 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 6 PM THIS EVENING TO 6 PM MDT TUESDAY ABOVE 5000 FEET... A WINTER WEATHER ADVISORY ABOVE 5000 FEET REMAINS IN EFFECT FROM 6 PM THIS EVENING TO 6 PM MDT TUESDAY. SNOW WILL BEGIN TO FALL LATE THIS AFTERNOON BUT THE MAIN SNOW ACCUMULATIONS WILL BEGIN IN THE EVENING. WIND WILL ACCOMPANY THE SNOW...WITH SNOW AND BLOWING SNOW BECOMING THE MAIN IMPACT OF THIS SYSTEM. MOUNTAIN SNOW ACCUMULATIONS OF 4 TO 7 INCHES ARE POSSIBLE BY TUESDAY EVENING. MOUNTAIN PASSES INCLUDING LOST TRAIL AND BANNOCK WILL EXPERIENCE WIND AND SNOW ACCUMULATIONS AS WELL. HUNTERS AND TRAVELERS SHOULD BE PREPARED FOR SIGNIFICANT SNOW ACCUMULATIONS ACCOMPANIED WITH GUSTY WINDS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...BLOWING SNOW...OR FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$
000 WWUS45 KMSO 270250 WSWMSO URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE MISSOULA MT 850 PM MDT MON OCT 26 2009 ...MOUNTAIN SNOW ALONG WITH INCREASED WINDS WILL IMPACT THE NORTHERN ROCKIES THROUGH TUESDAY... .A MOIST AND STRONG PACIFIC WEATHER SYSTEM WILL CONTINUE TO MOVE THROUGH THE NORTHERN ROCKIES. ACCUMULATING SNOW IS EXPECTED...MAINLY IN THE HIGHER TERRAIN OF WESTERN MONTANA AND NORTH CENTRAL IDAHO. WINDS WILL INCREASE AND CREATE POTENTIALLY HAZARDOUS CONDITIONS DUE TO SNOW AND BLOWING SNOW. IN ADDITION...THE EVOLUTION OF THE WEATHER PATTERN FAVORS ACCUMULATING SNOW IN THE CAMAS PRAIRIE AREA...INCLUDING WHITE BIRD SUMMIT TUESDAY. AFTER THE COLD FRONT PASSES TONIGHT...COOLER MOIST AIR WILL BE USHERED IN BY A NORTHERLY WIND FLOW ACROSS NORTH CENTRAL IDAHO. THIS FLOW FAVORS PRECIPITATION ENHANCEMENT AS IT IS LOCALLY FORCED UP THE TERRAIN. IDZ007-008-271100- /O.CON.KMSO.WS.W.0019.091027T1200Z-091028T0300Z/ OROFINO/GRANGEVILLE REGION-LOWER HELLS CANYON/SALMON RIVER REGION- 750 PM PDT MON OCT 26 2009 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 5 AM TO 8 PM PDT TUESDAY ABOVE 4000 FEET... A WINTER STORM WARNING ABOVE 4000 FEET REMAINS IN EFFECT FROM 5 AM TO 8 PM PDT TUESDAY. SNOW AND BLOWING SNOW WILL CREATE HAZARDOUS TRAVEL OVER WHITEBIRD GRADE TUESDAY. RAIN WILL CHANGE OVER TO SNOW BY TUESDAY MORNING AS THE MOIST ATMOSPHERE COOLS UNDER THE INFLUENCE OF A NORTHERLY FLOW. THIS NORTHERLY FLOW FAVORS ENHANCEMENT OVER THE FOOTHILLS AND PLATEAUS OF NORTH CENTRAL IDAHO. NEW SNOW ACCUMULATIONS OF 5 TO 8 INCHES ARE POSSIBLE BY TUESDAY EVENING OVER WHITEBIRD GRADE AND 3 TO 5 INCHES IN THE GRANGEVILLE AREA. LOCALIZED BLOWING SNOW OVER THE CAMAS PRAIRIE WILL CAUSE VISIBILITY REDUCTIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING MEANS SIGNIFICANT AMOUNTS OF SNOW... BLOWING SNOW...OR FREEZING RAIN ARE EXPECTED OR OCCURRING. STRONG WINDS AND DANGEROUS WIND CHILLS ARE ALSO POSSIBLE. THIS WILL MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE. && $$ IDZ006-MTZ006-271100- /O.CON.KMSO.WS.W.0019.000000T0000Z-091028T0300Z/ SOUTHERN CLEARWATER MOUNTAINS-BITTERROOT/SAPPHIRE MOUNTAINS- 850 PM MDT MON OCT 26 2009 /750 PM PDT MON OCT 26 2009/ ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 9 PM MDT /8 PM PDT/ TUESDAY ABOVE 4500 FEET... A WINTER STORM WARNING ABOVE 4500 FEET REMAINS IN EFFECT UNTIL 9 PM MDT /8 PM PDT/ TUESDAY. WIND WILL ACCOMPANY ACCUMULATING SNOW...WITH SNOW AND BLOWING SNOW BECOMING THE MAIN IMPACT OF THIS SYSTEM. MOUNTAIN SNOW ACCUMULATIONS OF UP TO 12 INCHES ARE POSSIBLE BY TUESDAY EVENING. MOUNTAIN PASSES INCLUDING LOLO AND LOST TRAIL WILL EXPERIENCE WIND AND SNOW ACCUMULATIONS AS WELL. HUNTERS AND TRAVELERS SHOULD BE PREPARED FOR SIGNIFICANT SNOW ACCUMULATIONS ACCOMPANIED BY GUSTY WINDS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING MEANS SIGNIFICANT AMOUNTS OF SNOW... BLOWING SNOW...OR FREEZING RAIN ARE EXPECTED OR OCCURRING. STRONG WINDS AND DANGEROUS WIND CHILLS ARE ALSO POSSIBLE. THIS WILL MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE. && $$ IDZ005-MTZ002-004-043-271100- /O.CON.KMSO.WS.W.0019.000000T0000Z-091027T1800Z/ NORTHERN CLEARWATER MOUNTAINS-WEST GLACIER REGION- LOWER CLARK FORK REGION-POTOMAC/SEELEY LAKE REGION- 850 PM MDT MON OCT 26 2009 /750 PM PDT MON OCT 26 2009/ ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON MDT /11 AM PDT/ TUESDAY ABOVE 4500 FEET... A WINTER STORM WARNING ABOVE 4500 FEET REMAINS IN EFFECT UNTIL NOON MDT /11 AM PDT/ TUESDAY. WIND WILL ACCOMPANY ACCUMULATING SNOW...WITH SNOW AND BLOWING SNOW BECOMING THE MAIN IMPACT OF THIS SYSTEM. MOUNTAIN SNOW ACCUMULATIONS OF UP TO 10 INCHES ARE POSSIBLE BY TUESDAY MORNING. MOUNTAIN PASSES INCLUDING MARIAS AND LOOKOUT WILL EXPERIENCE WIND AND SNOW ACCUMULATIONS AS WELL. HUNTERS AND TRAVELERS SHOULD BE PREPARED FOR SIGNIFICANT SNOW ACCUMULATIONS ACCOMPANIED BY GUSTY WINDS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING MEANS SIGNIFICANT AMOUNTS OF SNOW... BLOWING SNOW...OR FREEZING RAIN ARE EXPECTED OR OCCURRING. STRONG WINDS AND DANGEROUS WIND CHILLS ARE ALSO POSSIBLE. THIS WILL MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE. && $$ IDZ010-271100- /O.CON.KMSO.WW.Y.0061.000000T0000Z-091028T0000Z/ EASTERN LEMHI COUNTY- 850 PM MDT MON OCT 26 2009 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM MDT TUESDAY ABOVE 5000 FEET... A WINTER WEATHER ADVISORY ABOVE 5000 FEET REMAINS IN EFFECT UNTIL 6 PM MDT TUESDAY. WIND WILL ACCOMPANY ACCUMULATING SNOW...WITH SNOW AND BLOWING SNOW BECOMING THE MAIN IMPACT OF THIS SYSTEM. MOUNTAIN SNOW ACCUMULATIONS OF 4 TO 7 INCHES ARE POSSIBLE BY TUESDAY EVENING. MOUNTAIN PASSES INCLUDING LOST TRAIL AND BANNOCK WILL EXPERIENCE WIND AND SNOW ACCUMULATIONS AS WELL. HUNTERS AND TRAVELERS SHOULD BE PREPARED FOR SIGNIFICANT SNOW ACCUMULATIONS ACCOMPANIED WITH GUSTY WINDS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...BLOWING SNOW...OR FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$
000 WWUS45 KMSO 270938 WSWMSO URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE MISSOULA MT 338 AM MDT TUE OCT 27 2009 ...MOUNTAIN SNOW ALONG WITH INCREASED WINDS WILL CONTINUE IMPACT THE NORTHERN ROCKIES TODAY... .A MOIST AND STRONG PACIFIC WEATHER SYSTEM WILL CONTINUE TO MOVE THROUGH THE NORTHERN ROCKIES. ACCUMULATING SNOW IS EXPECTED... MAINLY IN THE HIGHER TERRAIN OF WESTERN MONTANA AND NORTH CENTRAL IDAHO. WINDS CREATE POTENTIALLY HAZARDOUS CONDITIONS DUE TO SNOW AND BLOWING SNOW. IN ADDITION...THE EVOLUTION OF THE WEATHER PATTERN FAVORS ACCUMULATING SNOW IN THE CAMAS PRAIRIE AREA...INCLUDING WHITE BIRD SUMMIT TODAY. MOIST AND COOL AIR IS BEING USHERED IN BY A NORTHWESTERLY WIND FLOW ACROSS NORTH CENTRAL IDAHO. THIS FLOW FAVORS PRECIPITATION ENHANCEMENT AS IT IS LOCALLY FORCED UP THE TERRAIN. MTZ004-271045- /O.CAN.KMSO.WS.W.0019.000000T0000Z-091027T1800Z/ LOWER CLARK FORK REGION- 338 AM MDT TUE OCT 27 2009 ...WINTER STORM WARNING IS CANCELLED... THE NATIONAL WEATHER SERVICE IN MISSOULA HAS CANCELLED THE WINTER STORM WARNING. SNOW SHOWERS WILL CONTINUE TODAY...BUT SIGNIFICANT SNOW ACCUMULATIONS ARE NO LONGER EXPECTED. $$ IDZ007-008-271800- /O.CON.KMSO.WS.W.0019.091027T1200Z-091028T0300Z/ OROFINO/GRANGEVILLE REGION-LOWER HELLS CANYON/SALMON RIVER REGION- 238 AM PDT TUE OCT 27 2009 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING ABOVE 4000 FEET... A WINTER STORM WARNING ABOVE 4000 FEET REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING. SNOW AND BLOWING SNOW WILL CREATE HAZARDOUS TRAVEL OVER WHITEBIRD GRADE TODAY. A COOL AND MOIST NORTHWESTERLY FLOW TODAY FAVORS SNOW ENHANCEMENT OVER THE FOOTHILLS AND PLATEAUS OF NORTH CENTRAL IDAHO. NEW SNOW ACCUMULATIONS OF 5 TO 8 INCHES ARE POSSIBLE BY THIS EVENING OVER WHITEBIRD GRADE AND 3 TO 5 INCHES IN THE GRANGEVILLE AREA. LOCALIZED BLOWING SNOW OVER THE CAMAS PRAIRIE WILL CAUSE VISIBILITY REDUCTIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING MEANS SIGNIFICANT AMOUNTS OF SNOW AND BLOWING SNOW...ARE EXPECTED OR OCCURRING. STRONG WINDS AND DANGEROUS WIND CHILLS ARE ALSO POSSIBLE. THIS WILL MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE. && $$ IDZ006-MTZ006-271800- /O.CON.KMSO.WS.W.0019.000000T0000Z-091028T0300Z/ SOUTHERN CLEARWATER MOUNTAINS-BITTERROOT/SAPPHIRE MOUNTAINS- 338 AM MDT TUE OCT 27 2009 /238 AM PDT TUE OCT 27 2009/ ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 9 PM MDT /8 PM PDT/ THIS EVENING ABOVE 4500 FEET... A WINTER STORM WARNING ABOVE 4500 FEET REMAINS IN EFFECT UNTIL 9 PM MDT /8 PM PDT/ THIS EVENING. WIND WILL ACCOMPANY ACCUMULATING SNOW...WITH SNOW AND BLOWING SNOW BECOMING THE MAIN IMPACT OF THIS SYSTEM. MOUNTAIN SNOW ACCUMULATIONS OF UP TO 12 INCHES ARE POSSIBLE BY THIS EVENING. MOUNTAIN PASSES INCLUDING LOLO AND LOST TRAIL WILL EXPERIENCE WIND AND SNOW ACCUMULATIONS AS WELL. HUNTERS AND TRAVELERS SHOULD BE PREPARED FOR SIGNIFICANT SNOW ACCUMULATIONS ACCOMPANIED BY GUSTY WINDS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING MEANS SIGNIFICANT AMOUNTS OF SNOW AND BLOWING SNOW...ARE EXPECTED OR OCCURRING. STRONG WINDS AND DANGEROUS WIND CHILLS ARE ALSO POSSIBLE. THIS WILL MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE. && $$ IDZ005-MTZ002-043-271800- /O.CON.KMSO.WS.W.0019.000000T0000Z-091027T1800Z/ NORTHERN CLEARWATER MOUNTAINS-WEST GLACIER REGION- POTOMAC/SEELEY LAKE REGION- 338 AM MDT TUE OCT 27 2009 /238 AM PDT TUE OCT 27 2009/ ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON MDT /11 AM PDT/ TODAY ABOVE 4500 FEET... A WINTER STORM WARNING ABOVE 4500 FEET REMAINS IN EFFECT UNTIL NOON MDT /11 AM PDT/ TODAY. WIND WILL ACCOMPANY ACCUMULATING SNOW...WITH SNOW AND BLOWING SNOW BECOMING THE MAIN IMPACT OF THIS SYSTEM. MOUNTAIN SNOW ACCUMULATIONS OF UP TO 12 INCHES ARE POSSIBLE BY LATE THIS MORNING. MOUNTAIN PASSES INCLUDING MARIAS WILL EXPERIENCE WIND AND SNOW ACCUMULATIONS AS WELL. HUNTERS AND TRAVELERS SHOULD BE PREPARED FOR SIGNIFICANT SNOW ACCUMULATIONS ACCOMPANIED BY GUSTY WINDS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING MEANS SIGNIFICANT AMOUNTS OF SNOW AND BLOWING SNOW...ARE EXPECTED OR OCCURRING. STRONG WINDS AND DANGEROUS WIND CHILLS ARE ALSO POSSIBLE. THIS WILL MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE. && $$ IDZ010-271800- /O.CON.KMSO.WW.Y.0061.000000T0000Z-091028T0000Z/ EASTERN LEMHI COUNTY- 338 AM MDT TUE OCT 27 2009 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM MDT THIS EVENING ABOVE 5000 FEET... A WINTER WEATHER ADVISORY ABOVE 5000 FEET REMAINS IN EFFECT UNTIL 6 PM MDT THIS EVENING. WIND WILL ACCOMPANY ACCUMULATING SNOW...WITH SNOW AND BLOWING SNOW BECOMING THE MAIN IMPACT OF THIS SYSTEM. TOTAL MOUNTAIN SNOW ACCUMULATIONS OF 4 TO 7 INCHES ARE POSSIBLE BY THIS EVENING. MOUNTAIN PASSES INCLUDING LOST TRAIL AND BANNOCK WILL EXPERIENCE WIND AND SNOW ACCUMULATIONS AS WELL. HUNTERS AND TRAVELERS SHOULD BE PREPARED FOR SIGNIFICANT SNOW ACCUMULATIONS ACCOMPANIED WITH GUSTY WINDS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...BLOWING SNOW...OR FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$
000 WWUS45 KMSO 271521 AAA WSWMSO URGENT - WINTER WEATHER MESSAGE...UPDATED NATIONAL WEATHER SERVICE MISSOULA MT 921 AM MDT TUE OCT 27 2009 ...MOUNTAIN SNOW SHOWERS WILL CONTINUE IMPACT THE NORTHERN ROCKIES TODAY... .A MOIST AND STRONG PACIFIC WEATHER SYSTEM WILL CONTINUE TO MOVE THROUGH THE NORTHERN ROCKIES. ACCUMULATING SNOW IS EXPECTED... MAINLY IN THE HIGHER TERRAIN OF WESTERN MONTANA AND NORTH CENTRAL IDAHO. INCREASED WINDS WILL CREATE POTENTIALLY HAZARDOUS CONDITIONS DUE TO SNOW AND BLOWING SNOW. IDZ007-008-271630- /O.CAN.KMSO.WS.W.0019.000000T0000Z-091028T0300Z/ OROFINO/GRANGEVILLE REGION-LOWER HELLS CANYON/SALMON RIVER REGION- 821 AM PDT TUE OCT 27 2009 ...WINTER STORM WARNING IS CANCELLED... THE NATIONAL WEATHER SERVICE IN MISSOULA HAS CANCELED THE WINTER STORM WARNING. SNOW HAS DECREASED IN WEST CENTRAL IDAHO. SCATTERED SNOW SHOWERS ARE EXPECTED TO CONTINUE THROUGH THE AFTERNOON HOURS WITH ONLY LIGHT SNOW ACCUMULATIONS EXPECTED. $$ IDZ006-MTZ006-271800- /O.CON.KMSO.WS.W.0019.000000T0000Z-091028T0300Z/ SOUTHERN CLEARWATER MOUNTAINS-BITTERROOT/SAPPHIRE MOUNTAINS- 921 AM MDT TUE OCT 27 2009 /821 AM PDT TUE OCT 27 2009/ ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 9 PM MDT /8 PM PDT/ THIS EVENING ABOVE 4500 FEET... A WINTER STORM WARNING ABOVE 4500 FEET REMAINS IN EFFECT UNTIL 9 PM MDT /8 PM PDT/ THIS EVENING. WIND WILL ACCOMPANY ACCUMULATING SNOW...WITH SNOW AND BLOWING SNOW BECOMING THE MAIN IMPACT OF THIS SYSTEM. TOTAL MOUNTAIN SNOW ACCUMULATIONS OF 6 TO 10 INCHES WITH LOCALLY UP TO 12 INCHES ARE POSSIBLE BY THIS EVENING. MOUNTAIN PASSES INCLUDING LOLO AND LOST TRAIL WILL EXPERIENCE WIND AND SNOW ACCUMULATIONS AS WELL. HUNTERS AND TRAVELERS SHOULD BE PREPARED FOR SIGNIFICANT SNOW ACCUMULATIONS ACCOMPANIED BY GUSTY WINDS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING MEANS SIGNIFICANT AMOUNTS OF SNOW AND BLOWING SNOW...ARE EXPECTED OR OCCURRING. STRONG WINDS AND DANGEROUS WIND CHILLS ARE ALSO POSSIBLE. THIS WILL MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE. && $$ IDZ005-MTZ002-043-271800- /O.CON.KMSO.WS.W.0019.000000T0000Z-091027T1800Z/ NORTHERN CLEARWATER MOUNTAINS-WEST GLACIER REGION- POTOMAC/SEELEY LAKE REGION- 921 AM MDT TUE OCT 27 2009 /821 AM PDT TUE OCT 27 2009/ ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON MDT /11 AM PDT/ TODAY ABOVE 4500 FEET... A WINTER STORM WARNING ABOVE 4500 FEET REMAINS IN EFFECT UNTIL NOON MDT /11 AM PDT/ TODAY. WIND WILL ACCOMPANY ACCUMULATING SNOW...WITH SNOW AND BLOWING SNOW BECOMING THE MAIN IMPACT OF THIS SYSTEM. TOTAL MOUNTAIN SNOW ACCUMULATIONS OF 6 TO 10 INCHES LOCALLY UP TO 12 INCHES ARE POSSIBLE BY NOON. MOUNTAIN PASSES INCLUDING MARIAS WILL EXPERIENCE WIND AND SNOW ACCUMULATIONS AS WELL. HUNTERS AND TRAVELERS SHOULD BE PREPARED FOR SIGNIFICANT SNOW ACCUMULATIONS ACCOMPANIED BY GUSTY WINDS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING MEANS SIGNIFICANT AMOUNTS OF SNOW AND BLOWING SNOW...ARE EXPECTED OR OCCURRING. STRONG WINDS AND DANGEROUS WIND CHILLS ARE ALSO POSSIBLE. THIS WILL MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE. && $$ IDZ010-271800- /O.CON.KMSO.WW.Y.0061.000000T0000Z-091028T0000Z/ EASTERN LEMHI COUNTY- 921 AM MDT TUE OCT 27 2009 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM MDT THIS EVENING ABOVE 5000 FEET... A WINTER WEATHER ADVISORY ABOVE 5000 FEET REMAINS IN EFFECT UNTIL 6 PM MDT THIS EVENING. WIND WILL ACCOMPANY ACCUMULATING SNOW...WITH SNOW AND BLOWING SNOW BECOMING THE MAIN IMPACT OF THIS SYSTEM. TOTAL MOUNTAIN SNOW ACCUMULATIONS OF 4 TO 7 INCHES ARE POSSIBLE BY THIS EVENING. MOUNTAIN PASSES INCLUDING LOST TRAIL AND BANNOCK WILL EXPERIENCE WIND AND SNOW ACCUMULATIONS AS WELL. HUNTERS AND TRAVELERS SHOULD BE PREPARED FOR SIGNIFICANT SNOW ACCUMULATIONS ACCOMPANIED WITH GUSTY WINDS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...BLOWING SNOW...OR FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$
000 WWUS45 KMSO 271740 WSWMSO URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE MISSOULA MT 1140 AM MDT TUE OCT 27 2009 .AN UPPER LEVEL LOW WILL MOVE THROUGH WESTERN MONTANA THE REMAINDER OF THIS AFTERNOON AND EVENING AND PRODUCE SCATTERED MOUNTAIN SNOW SHOWERS WITH LIGHT ACCUMULATIONS POSSIBLE. IDZ006-MTZ006-271845- /O.CAN.KMSO.WS.W.0019.000000T0000Z-091028T0300Z/ SOUTHERN CLEARWATER MOUNTAINS-BITTERROOT/SAPPHIRE MOUNTAINS- 1140 AM MDT TUE OCT 27 2009 /1040 AM PDT TUE OCT 27 2009/ ...WINTER STORM WARNING IS CANCELLED... THE NATIONAL WEATHER SERVICE IN MISSOULA HAS CANCELED THE WINTER STORM WARNING. WIDESPREAD SNOW HAS TAPERED OFF TO SCATTERED SNOW SHOWER. ONLY LIGHT MOUNTAIN SNOW ACCUMULATIONS ARE ANTICIPATED THE REMAINDER THIS AFTERNOON. $$ IDZ005-MTZ002-043-271845- /O.CAN.KMSO.WS.W.0019.000000T0000Z-091027T1800Z/ NORTHERN CLEARWATER MOUNTAINS-WEST GLACIER REGION- POTOMAC/SEELEY LAKE REGION- 1140 AM MDT TUE OCT 27 2009 /1040 AM PDT TUE OCT 27 2009/ ...WINTER STORM WARNING IS CANCELLED... THE NATIONAL WEATHER SERVICE IN MISSOULA HAS CANCELED THE WINTER STORM WARNING. WIDESPREAD SNOW HAS TAPERED OFF TO SCATTERED SNOW SHOWER. ONLY LIGHT MOUNTAIN SNOW ACCUMULATIONS ARE ANTICIPATED THE REMAINDER THIS AFTERNOON. $$ IDZ010-271845- /O.CAN.KMSO.WW.Y.0061.000000T0000Z-091028T0000Z/ EASTERN LEMHI COUNTY- 1140 AM MDT TUE OCT 27 2009 ...WINTER WEATHER ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN MISSOULA HAS CANCELED THE WINTER WEATHER ADVISORY. WIDESPREAD SNOW HAS TAPERED OFF TO SCATTERED SNOW SHOWER. ONLY LIGHT MOUNTAIN SNOW ACCUMULATIONS ARE ANTICIPATED THE REMAINDER THIS AFTERNOON. $$
What forecasters said that day
The local office's own words before this winter storm warning 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 storm warning went out at Oct 26, 3:42 AM MDT, 17 minutes earlier.
Area forecast discussion, Oct 26, 3:42 AM MDT, 17 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MISSOULA MT
342 AM MDT MON OCT 26 2009
.DISCUSSION...
TODAY THROUGH WEDNESDAY...A STRONG PACIFIC WEATHER SYSTEM HAS BEGUN
ITS PROGRESSION INLAND AND INTO THE NORTHERN ROCKIES THIS MORNING.
LIGHT PRECIPITATION HAS ALREADY BEGUN IN THE NORTHERN PANHANDLE OF
IDAHO...NORTHWEST AND FAR WESTERN PORTION OF WESTERN MONTANA.
SOUTHWESTERLY FLOW AHEAD OF A VIGOROUS COLD FRONT...LOCATED JUST
OFF FROM THE WEST COAST...WILL CONTINUE TO SPREAD MOISTURE AND
PRECIPITATION THROUGHOUT THE REGION TODAY. THE FORECAST REMAINS ON
TRACK FOR SIGNIFICANT SNOWFALL AND GUSTY WINDS IN THE HIGHER
TERRAIN INCLUDING MOUNTAIN PASSES OF NORTH CENTRAL IDAHO AND
WESTERN MONTANA BEGINNING TODAY. WINTER WEATHER WARNINGS HAVE BEEN
ISSUED ABOVE 4500 FEET TO ACCOUNT FOR THE SNOW AND WIND ASSOCIATED
WITH THIS SYSTEM. THE MAJORITY OF THE SNOW WILL OCCUR AS THE COLD
FRONT PASSES AND SNOW LEVELS LOWER. AFTER THE COLD FRONT PASSES
PRECIPITATION WILL BECOME SHOWERY UNDER AN UNSTABLE AIRMASS. A
NORTHWESTERLY FLOW WILL ALSO FOLLOW BEHIND THE COLD FRONT AS THE
ASSOCIATED UPPER LEVEL TROUGH TAKES HOLD OF THE NORTHERN ROCKIES.
THIS FLOW WILL CREATE UPSLOPE SNOW ENHANCEMENT OVER GRANGEVILLE
AND THE WHITEBIRD GRADE ON TUESDAY. SNOW WILL LINGER THROUGH THE
CLEARWATERS...BITTERROOTS AND WEST CENTRAL MONTANA INTO
WEDNESDAY.
A PROGRESSIVE NORTHWESTERLY FLOW WILL SET UP ALOFT OVER THE REGION
THROUGH THE END OF THE WEEK AND INTO THE WEEKEND. THIS WILL KEEP
CLOUDS AND THE POTENTIAL FOR PRECIPITATION IN THE FORECAST THROUGH
THE PERIOD. IT WILL ALSO CONTINUE TO BRING PACIFIC AIR INTO THE
AREA WHICH WILL KEEP TEMPERATURES JUST BELOW AVERAGE FOR THIS TIME OF
YEAR. CURRENTLY IT APPEARS THE BEST CHANCE OF MORE VALLEY RAIN AND
HIGHER ELEVATION SNOW WILL BE FRIDAY. HALLOWEEN IS STILL A
QUESTION AS THERE HAS BEEN A GREAT DEAL OF INCONSISTENCY WITH
DIFFERENT MODELS AND RUN TO RUN CONTINUITY.
&&
.AVIATION...A STRONG PACIFIC WEATHER SYSTEM WILL CONTINUE TO MOVE
INTO THE NORTHERN ROCKIES TODAY BRINGING RAIN AND MOUNTAIN SNOW.
CLOUD DECKS AT ALL AIRFIELD WILL LOWER TODAY AS A STRONG COLD
FRONT APPROACHES AND PASSES THROUGH THIS EVENING. RAIN AT AREA
AIRFIELDS WILL BECOME SNOW AFTER THE FRONT PASSES GENERALLY AROUND
03Z TUESDAY NORTH AND 06Z TUESDAY SOUTH. WINDS WILL ALSO INCREASE
THROUGH THE DAY WITH VISIBILITY REDUCTIONS FROM PRECIPITATION AND
WIND POSSIBLE LATE THIS EVENING.
&&
.MSO WATCHES/WARNINGS/ADVISORIES...
MT...WINTER STORM WARNING FROM NOON TODAY TO NOON MDT TUESDAY ABOVE
4500 FEET FOR LOWER CLARK FORK REGION-POTOMAC/SEELEY LAKE
REGION-WEST GLACIER REGION.
WINTER STORM WARNING FROM NOON TODAY TO 9 PM MDT TUESDAY ABOVE
4500 FEET FOR BITTERROOT/SAPPHIRE MOUNTAINS.
ID...WINTER STORM WARNING FROM 5 AM TO 8 PM PDT TUESDAY ABOVE 3000
FEET FOR LOWER HELLS CANYON/SALMON RIVER REGION-
OROFINO/GRANGEVILLE REGION.
WINTER STORM WARNING FROM 11 AM THIS MORNING TO 11 AM PDT
TUESDAY ABOVE 4500 FEET FOR NORTHERN CLEARWATER MOUNTAINS.
WINTER STORM WARNING FROM 11 AM THIS MORNING TO 8 PM PDT TUESDAY
ABOVE 4500 FEET FOR SOUTHERN CLEARWATER MOUNTAINS.
WINTER WEATHER ADVISORY FROM 6 PM THIS EVENING TO 6 PM MDT
TUESDAY FOR EASTERN LEMHI COUNTY.
&&
SHORT TERM...KITSMILLER
LONG TERM....LOEFFELBEIN
AVIATION...KITSMILLERThe office that day
Everything else NWS Missoula, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 26, 3:59 AM MDT | Winter Weather Advisory | MSO | Lemhi | 32 hr |
Nearby
Winter Storm Warnings in Montana, 2009Winter Storm Warnings in Idaho, 2009Every winter storm warning in 2009
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.