Alert archive / Montana / Winter Storm Warnings in 2015
Winter Storm Warning 10, NWS Missoula, MT
NWS Missoula, MT issued this winter storm warning at Dec 12, 2015, 1:45 PM PST for Clearwater County, Idaho County, Lemhi County, Idaho; 9 counties in Montana. It took effect at Dec 12, 2015, 4:00 PM PST. It was in force for 54 hr. 24 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Dec 12, 2015, 1:45 PM PST (21:45 UTC)
- In effect from
- Dec 12, 2015, 4:00 PM PST
- Expired
- Dec 14, 2015, 9:44 PM PST
- In force
- 54 hr
- Issued by
- NWS Missoula, MT
Counties Clearwater County, ID, Idaho County, ID, Lemhi County, ID, Deer Lodge 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), 59 km from the middle of the area, began a volume at 21:50 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Dec 13, 4:00 AM PST | HEAVY SNOW 8 | 5 Nw East Portal, MT | LOOKOUT PASS REPORTED 8 INCHES NEW SNOW |
| Dec 13, 7:15 AM PST | SNOW 8 | Lost Trail Pass, MT | LOST TRAIL POWDER MOUNTAIN REPORTED 8 INCHES IN THE LAST 12 HOURS |
| Dec 13, 8:30 AM PST | SNOW 2 | Salmon, ID | 2 INCHES NEW OVERNIGHT, 4 INCHES TOTAL ON THE GROUND |
| Dec 13, 6:00 PM PST | HEAVY SNOW 5 | 8 Ene Powell, ID | LOLO PASS SNOTEL AT 5240 FT. 0.50 INCHES OF SNOW WATER EQUIVALENT. |
| Dec 14, 5:00 AM PST | SNOW 5.8 | 27 Nne Challis, ID | SCHWARTZ LAKE SNOTEL 8620 MSL. 37-HOUR TOTAL. |
| Dec 14, 5:00 AM PST | HEAVY SNOW 9.9 | 37 Ne Mackay, ID | MEADOW LAKE SNOTEL 9150 MSL. 37-HOUR TOTAL. |
| Dec 14, 5:00 AM PST | HEAVY SNOW 10.9 | 32 Ne Mackay, ID | MOONSHINE SNOTEL 7440 MSL. 37-HOUR TOTAL. |
| Dec 14, 5:00 AM PST | HEAVY SNOW 18.7 | 24 N Challis, ID | MORGAN CREEK SNOTEL 7600 MSL. 37-HOUR TOTAL. |
| Dec 14, 6:00 AM PST | SNOW 1 | 1 Nnw Hamilton, MT | CO-OP OBSERVER STATION HAMILTON /HAMM8/ |
| Dec 14, 6:00 AM PST | SNOW 3 | 3 Sse May, ID | CO-OP OBSERVER STATION MAY 2SSE /MAYI1/ |
| Dec 14, 6:00 AM PST | SNOW 6 | 5 Ssw Porters Corner, MT | 0.40 INCHES OF SNOW WATER EQUIVALENT. |
| Dec 14, 6:00 AM PST | HEAVY SNOW 8 | 8 S Janney, MT | BASIN CREEK SNOTEL 7180 FT. 1.00 OF SNOW WATER EQUIVALENT. |
| Dec 14, 6:00 AM PST | HEAVY SNOW 9 | 6 Ne Georgetown, MT | WARM SPRINGS SNOTEL AT 7800 FT. 0.70 INCHES OF SNOW WATER EQUIVALENT. |
| Dec 14, 7:00 AM PST | SNOW 1.2 | Pierce, ID | MESONET STATION PIERCE /PIRI1/ |
| Dec 14, 7:10 AM PST | SNOW 4 | 2 Sw Newcomb, MT | 12 INCH DRIFTS. LIGHT SNOW NOW WITH STRONG GUSTY WINDS. ELEVATION 6300 FT. |
| Dec 14, 7:45 AM PST | SNOW 5 | 6 Nw Leadore, ID | 4 TO 6 INCHES OF SNOW FELL IN SOME OF THE CREEKS NORTHWEST OF LEADORE. GUSTY WINDS WERE ALSO REPORTED. |
| Dec 14, 7:45 AM PST | SNOW 5.5 | Salmon, ID | SNOW AMOUNTS RANGED FROM 3 TO 5 INCHES AROUND THE SALMON AREA. 0.17 OF SNOW WATER EQUIVALENT WAS MEASURED BY COOP AT KSRA RADIO. |
| Dec 14, 7:45 AM PST | HEAVY SNOW 14 | 7 E Cobalt, ID | WILLIAMS CREEK SUMMIT AT 7800 FT. SAW 12 TO 16 INCHES OF SNOW THIS MORNING. THERE WAS 16 INCHES ON THE EAST SIDE AND 12 INCHES ON TOP. BLOWING AND DRIFTING. STILL SNOWING AT THE TIME OF THIS REPORT. |
| Dec 14, 8:12 AM PST | HEAVY SNOW 21 | Lost Trail Pass, MT | LOST TRAIL SKI RESORT AT 7000 FEET SAW 14 INCHES SATURDAY NIGHT AND 7 INCHES SUNDAY NIGHT (LAST NIGHT). |
| Dec 14, 2:34 PM PST | SNOW 1.5 | 3 Nne Newcomb, MT | BERT MOONEY AIRPORT OBSERVER. THE ASOS REPORTED 0.07 INCHES OF SNOW WATER EQUIVALENT. |
| Dec 14, 3:00 PM PST | HEAVY SNOW 22 | 5 S Blossburg, MT | MACDONALD PASS ON US-12 ESTIMATED AMOUNT. |
| Dec 14, 3:09 PM PST | HEAVY SNOW 10 | Elliston, MT | HEAVIEST SNOW FELL LAST NIGHT THROUGH THIS MORNING. |
| Dec 14, 3:11 PM PST | HEAVY SNOW 16 | 5 Sse Elliston, MT | |
| Dec 14, 3:18 PM PST | HEAVY SNOW 18 | Maxville, MT |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Spokane, WA (KOTX), launched 12:00Z, 9.8 hours before the alert went out and 217 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
- 727 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 83 m²/s²
- 0-3 km storm-relative helicity
- 80 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
476 WWUS45 KMSO 122145 WSWMSO URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE MISSOULA MT 245 PM MST SAT DEC 12 2015 IDZ005-006-008-009-MTZ004-006-141800- /O.UPG.KMSO.WS.A.0005.151213T0000Z-151214T1800Z/ /O.NEW.KMSO.WS.W.0010.151213T0000Z-151214T1800Z/ 245 PM MST SAT DEC 12 2015 /145 PM PST SAT DEC 12 2015/ ...WINTER STORM WARNING IN EFFECT FROM 5 PM MST /4 PM PST/ THIS AFTERNOON TO 11 AM MST /10 AM PST/ MONDAY... THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A WINTER STORM WARNING FOR HEAVY SNOW AND ASSOCIATED HAZARDOUS TRAVEL...WHICH IS IN EFFECT FROM 5 PM MST /4 PM PST/ THIS AFTERNOON TO 11 AM MST /10 AM PST/ MONDAY. THE WINTER STORM WATCH IS NO LONGER IN EFFECT. * IMPACTS/TIMING: PERIODS OF MODERATE TO HEAVY SNOWFALL...BREEZY WINDS...AND BLOWING SNOW WILL CREATE HAZARDOUS TRAVEL LATE THIS AFTERNOON THROUGH MONDAY MORNING. THE HEAVIEST SNOW WILL BE SATURDAY NIGHT INTO SUNDAY MORNING...FOLLOWED BY CONTINUED PERIODS OF LIGHT TO MODERATE SNOW THROUGH MONDAY. * SNOW ACCUMULATIONS: TOTALS OF 6 INCHES TO A FOOT POSSIBLE FOR MOUNTAIN PASSES AND OTHER HIGHER ELEVATIONS...WITH LOCALLY HIGHER AMOUNTS. VALLEYS, INCLUDING THE HIGHWAY 12 AND INTERSTATE 90 CORRIDORS, COULD RECEIVE 4 TO 8 INCHES. * WINDS: WEST 15 TO 25 MPH WITH GUSTS UP TO 40 MPH. LOCALLY HIGHER GUSTS POSSIBLE. BLOWING SNOW AND LOW VISIBILITY...ESPECIALLY IN WIND-PRONE EXPOSED AREAS. * LOCATIONS IMPACTED INCLUDE...ELK RIVER...HIGHWAY 11 PIERCE TO HEADQUARTERS...PIERCE...DIXIE...ELK CITY...HIGHWAY 12 LOWELL TO LOLO PASS...HIGHWAY 95 SLATE CREEK TO RIGGINS...WHITE BIRD GRADE...SHOUP...EVARO HILL...HIGHWAY 200 THOMPSON FALLS TO PLAINS...HIGHWAY 200 TROUT CREEK TO HERON...I-90 LOOKOUT PASS TO HAUGAN...HIGHWAY 93 SULA TO LOST TRAIL PASS...LOLO PASS $$ IDZ010-MTZ007-043-141915- /O.UPG.KMSO.WS.A.0005.151214T0000Z-151214T1800Z/ /O.NEW.KMSO.WS.W.0010.151213T1500Z-151215T0600Z/ 245 PM MST SAT DEC 12 2015 ...WINTER STORM WARNING IN EFFECT FROM 8 AM SUNDAY TO 11 PM MST MONDAY... THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A WINTER STORM WARNING FOR HEAVY SNOW AND ASSOCIATED HAZARDOUS TRAVEL...WHICH IS IN EFFECT FROM 8 AM SUNDAY TO 11 PM MST MONDAY. THE WINTER STORM WATCH IS NO LONGER IN EFFECT. * IMPACTS/TIMING: PERIODS OF MODERATE TO HEAVY SNOWFALL... BREEZY WINDS... AND BLOWING SNOW WILL CREATE HAZARDOUS TRAVEL SUNDAY THROUGH MONDAY. THE PERIOD OF HEAVIEST SNOW WILL OCCUR EARLY MONDAY MORNING. GREATEST TRAVEL IMPACTS ARE EXPECTED ALONG INTERSTATE 90 FROM DEER LODGE THROUGH BUTTE AND HOMESTAKE PASS. * SNOW ACCUMULATIONS: 5 TO 10 INCHES BELOW 6000 FEET... AND 8 INCHES TO A FOOT POSSIBLE FOR MOUNTAIN PASSES AND OTHER HIGHER ELEVATIONS... WITH LOCALLY HIGHER AMOUNTS. * WINDS: WEST AND SOUTHWEST 15 TO 25 MPH WITH GUSTS UP TO 40 MPH. LOCALLY HIGHER GUSTS POSSIBLE. BLOWING SNOW AND LOW VISIBILITY... ESPECIALLY IN WIND-PRONE AREAS. * LOCATIONS IMPACTED INCLUDE...BANNOCK PASS...HIGHWAY 28 TENDOY TO LONE PINE...HIGHWAY 93 LOST TRAIL PASS TO GIBBONSVILLE... LEMHI PASS...SALMON...BUTTE...GEORGETOWN LAKE...HIGHWAY 12 GARRISON TO ELLISTON...HOMESTAKE PASS...MACDONALD PASS... HIGHWAY 200 BONNER TO GREENOUGH...HIGHWAY 83 SEELEY LAKE TO CONDON...I-90 EAST MISSOULA TO BEARMOUTH $$ MTZ001-003-141800- /O.NEW.KMSO.WW.Y.0050.151213T0000Z-151214T1800Z/ 245 PM MST SAT DEC 12 2015 ...WINTER WEATHER ADVISORY IN EFFECT FROM 5 PM THIS AFTERNOON TO 11 AM MST MONDAY... THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A WINTER WEATHER ADVISORY FOR SNOW AND POTENTIALLY HAZARDOUS TRAVEL...WHICH IS IN EFFECT FROM 5 PM THIS AFTERNOON TO 11 AM MST MONDAY. * IMPACTS/TIMING: AN INITIAL ROUND OF MODERATE TO HEAVY SNOW WILL MOVE INTO THE AREA SATURDAY EVENING, LEADING TO SLICK ROADS AND HAZARDOUS TRAVEL CONDITIONS OVERNIGHT AND INTO SUNDAY. LINGERING SNOW SHOWERS ARE LIKELY TO CONTINUE INTO MONDAY MORNING, IMPACTING THE MORNING COMMUTE. * SNOW ACCUMULATIONS: 2 TO 5 INCHES FOR MOST VALLEY LOCATIONS. * LOCATIONS IMPACTED INCLUDE...HIGHWAY 2 KALISPELL TO LIBBY... HIGHWAY 37 EUREKA TO LIBBY...HIGHWAY 56 BULL LAKE ROAD... HIGHWAY 93 EUREKA TO WHITEFISH...FLATHEAD LAKE...FLATHEAD VALLEY... MISSION VALLEY...POLSON $$ MTZ005-141800- /O.NEW.KMSO.WW.Y.0050.151213T0000Z-151214T1800Z/ 245 PM MST SAT DEC 12 2015 ...WINTER WEATHER ADVISORY IN EFFECT FROM 5 PM THIS AFTERNOON TO 11 AM MST MONDAY... THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A WINTER WEATHER ADVISORY FOR SNOW AND POTENTIALLY HAZARDOUS TRAVEL...WHICH IS IN EFFECT FROM 5 PM THIS AFTERNOON TO 11 AM MST MONDAY. * IMPACTS/TIMING: AN INITIAL ROUND OF LIGHT TO MODERATE SNOW WILL MOVE INTO THE AREA SATURDAY EVENING, LEADING TO SLICK ROADS AND HAZARDOUS TRAVEL CONDITIONS INTO SUNDAY. SNOW MAY MIX WITH RAIN SUNDAY AFTERNOON, BEFORE TURNING BACK TO ALL SNOW IN THE EVENING. HEAVIER SNOWFALL IS EXPECTED SUNDAY NIGHT, ESPECIALLY FOR THE CENTRAL AND SOUTHERN BITTERROOT VALLEY, LEADING TO A DIFFICULT COMMUTE MONDAY MORNING. * SNOW ACCUMULATIONS: 2 TO 5 INCHES IN THE MISSOULA VALLEY...AND 3 TO 6 INCHES IN THE CENTRAL AND SOUTHERN BITTERROOT VALLEY. * LOCATIONS IMPACTED INCLUDE...BITTERROOT VALLEY...MISSOULA $$ MTZ002-141800- /O.NEW.KMSO.WW.Y.0050.151213T0000Z-151214T1800Z/ 245 PM MST SAT DEC 12 2015 ...WINTER WEATHER ADVISORY IN EFFECT FROM 5 PM THIS AFTERNOON TO 11 AM MST MONDAY... THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A WINTER WEATHER ADVISORY FOR SNOW AND POTENTIALLY HAZARDOUS TRAVEL...WHICH IS IN EFFECT FROM 5 PM THIS AFTERNOON TO 11 AM MST MONDAY. * IMPACTS/TIMING: AN INITIAL ROUND OF MODERATE TO HEAVY SNOW WILL MOVE INTO THE AREA SATURDAY EVENING, LEADING TO SLICK ROADS AND HAZARDOUS TRAVEL CONDITIONS. LINGERING SNOW SHOWERS WILL CONTINUE INTO MONDAY MORNING AND WILL LIKELY IMPACT THE MORNING COMMUTE. * SNOW ACCUMULATIONS: 3 TO 6 INCHES IN THE VALLEYS, AND 5 TO 10 INCHES ALONG THE HIGHER ELEVATIONS OF HIGHWAY 2 FROM ESSEX TO MARIAS PASS. * LOCATIONS IMPACTED INCLUDE...BAD ROCK CANYON...ESSEX...HIGHWAY 83 BIGFORK TO SWAN LAKE...MARIAS PASS...POLEBRIDGE $$
9 follow-up statements
416 WWUS45 KMSO 131105 WSWMSO URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE MISSOULA MT 405 AM MST SUN DEC 13 2015 IDZ005-006-008-009-MTZ004-006-141800- /O.CON.KMSO.WS.W.0010.000000T0000Z-151214T1800Z/ 405 AM MST SUN DEC 13 2015 /305 AM PST SUN DEC 13 2015/ ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST /10 AM PST/ MONDAY... * IMPACTS/TIMING: PERIODS OF MODERATE TO HEAVY SNOWFALL AND BLOWING SNOW WILL CONTINUE TO CREATE HAZARDOUS TRAVEL TODAY. THE HEAVIEST SNOW WILL BE THIS MORNING...FOLLOWED BY CONTINUED PERIODS OF LIGHT TO MODERATE SNOW THROUGH MONDAY. * SNOW ACCUMULATIONS: TOTALS OF AROUND ONE FOOT POSSIBLE FOR MOUNTAIN PASSES AND OTHER HIGHER ELEVATIONS...WITH LOCALLY HIGHER AMOUNTS. VALLEYS... INCLUDING THE HIGHWAY 12 AND INTERSTATE 90 CORRIDORS... COULD RECEIVE 4 TO 8 INCHES. * WINDS: SOUTHWEST BECOMING NORTHWEST 15 TO 25 MPH WITH GUSTS UP TO 40 MPH. LOCALLY HIGHER GUSTS POSSIBLE. BLOWING SNOW AND LOW VISIBILITY LIKELY. * LOCATIONS IMPACTED INCLUDE...ELK RIVER...HIGHWAY 11 PIERCE TO HEADQUARTERS...PIERCE...DIXIE...ELK CITY...HIGHWAY 12 LOWELL TO LOLO PASS...HIGHWAY 95 SLATE CREEK TO RIGGINS...WHITE BIRD GRADE...SHOUP...EVARO HILL...HIGHWAY 200 THOMPSON FALLS TO PLAINS...HIGHWAY 200 TROUT CREEK TO HERON...I-90 LOOKOUT PASS TO HAUGAN...HIGHWAY 93 SULA TO LOST TRAIL PASS...LOLO PASS $$ IDZ010-MTZ007-043-141800- /O.CON.KMSO.WS.W.0010.151213T1500Z-151215T0600Z/ 405 AM MST SUN DEC 13 2015 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 8 AM THIS MORNING TO 11 PM MST MONDAY... * IMPACTS/TIMING: PERIODS OF MODERATE TO HEAVY SNOWFALL AND BLOWING SNOW WILL CREATE HAZARDOUS TRAVEL BEGINNING TODAY. THE PERIOD OF HEAVIEST SNOW WILL OCCUR EARLY MONDAY MORNING. GREATEST TRAVEL IMPACTS ARE EXPECTED ALONG INTERSTATE 90 FROM DEER LODGE THROUGH BUTTE AND HOMESTAKE PASS. * SNOW ACCUMULATIONS: 5 TO 10 INCHES BELOW 6000 FEET... AND 8 INCHES TO A FOOT POSSIBLE FOR MOUNTAIN PASSES AND OTHER HIGHER ELEVATIONS... WITH LOCALLY HIGHER AMOUNTS. * WINDS: WEST-SOUTHWEST 15 TO 25 MPH WITH GUSTS UP TO 40 MPH. LOCALLY HIGHER GUSTS POSSIBLE. BLOWING SNOW AND LOW VISIBILITY LIKELY. * LOCATIONS IMPACTED INCLUDE...BANNOCK PASS...HIGHWAY 28 TENDOY TO LONE PINE...HIGHWAY 93 LOST TRAIL PASS TO GIBBONSVILLE... LEMHI PASS...SALMON...BUTTE...GEORGETOWN LAKE...HIGHWAY 12 GARRISON TO ELLISTON...HOMESTAKE PASS...MACDONALD PASS... HIGHWAY 200 BONNER TO GREENOUGH...HIGHWAY 83 SEELEY LAKE TO CONDON...I-90 EAST MISSOULA TO BEARMOUTH $$ IDZ007-141800- /O.EXB.KMSO.WW.Y.0050.151213T1800Z-151214T1800Z/ 305 AM PST SUN DEC 13 2015 ...WINTER WEATHER ADVISORY IN EFFECT FROM 10 AM THIS MORNING TO 10 AM PST MONDAY ABOVE 3000 FEET... THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A WINTER WEATHER ADVISORY FOR RAIN CHANGING TO SNOW ABOVE 3000 FEET... WHICH IS IN EFFECT FROM 10 AM THIS MORNING TO 10 AM PST MONDAY. * IMPACTS/TIMING: RAIN IS EXPECTED TO CHANGE TO SNOW THIS AFTERNOON. SLICK SNOW COVERED ROADS CAN BE EXPECTED TONIGHT THROUGH MONDAY MORNING. * SNOW ACCUMULATIONS: 2 TO 4 INCHES WITH LOCALLY HIGHER AMOUNTS BY MONDAY MORNING. * LOCATIONS IMPACTED INCLUDE...CAMAS PRAIRIE...GRANGEVILLE AND VICINITY $$ MTZ001-003-141800- /O.CON.KMSO.WW.Y.0050.000000T0000Z-151214T1800Z/ 405 AM MST SUN DEC 13 2015 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST MONDAY... * IMPACTS/TIMING: A MIX OF RAIN... SNOW... AND WINDS WILL CONTINUE TO BRING ICY... SLUSHY... OR SNOW COVERED ROADWAYS THIS MORNING. EXPECT QUICKLY CHANGING ROADS CONDITIONS. * SNOW ACCUMULATIONS: 2 TO 5 INCHES. * LOCATIONS IMPACTED INCLUDE...HIGHWAY 2 KALISPELL TO LIBBY... HIGHWAY 37 EUREKA TO LIBBY...HIGHWAY 56 BULL LAKE ROAD... HIGHWAY 93 EUREKA TO WHITEFISH...FLATHEAD LAKE...FLATHEAD VALLEY... MISSION VALLEY...POLSON $$ MTZ005-141800- /O.CON.KMSO.WW.Y.0050.000000T0000Z-151214T1800Z/ 405 AM MST SUN DEC 13 2015 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST MONDAY... * IMPACTS/TIMING: A MIX OF RAIN... SNOW... AND WINDS WILL CONTINUE TO BRING ICY... SLUSHY... OR SNOW COVERED ROADWAYS THIS MORNING. EXPECT QUICKLY CHANGING ROADS CONDITIONS THIS MORNING AND AGAIN THIS EVENING INTO THE OVERNIGHT HOURS. * SNOW ACCUMULATIONS: 1 TO 3 INCHES IN THE MISSOULA VALLEY...AND 3 TO 6 INCHES IN THE CENTRAL AND SOUTHERN BITTERROOT VALLEY BY MONDAY MORNING. * LOCATIONS IMPACTED INCLUDE...BITTERROOT VALLEY...MISSOULA $$ MTZ002-141800- /O.CON.KMSO.WW.Y.0050.000000T0000Z-151214T1800Z/ 405 AM MST SUN DEC 13 2015 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST MONDAY... * IMPACTS/TIMING: MODERATE TO HEAVY SNOW WILL CONTINUE TO CAUSE SLICK SNOW COVERED ROADWAYS. SNOW SHOWERS WILL CONTINUE INTO MONDAY MORNING AND LIKELY IMPACT THE MORNING COMMUTE. * SNOW ACCUMULATIONS: 3 TO 6 INCHES IN THE VALLEYS... AND 5 TO 10 INCHES IN HIGHER ELEVATIONS, INCLUDING HIGHWAY 2 FROM ESSEX TO MARIAS PASS. * LOCATIONS IMPACTED INCLUDE...BAD ROCK CANYON...ESSEX...HIGHWAY 83 BIGFORK TO SWAN LAKE...MARIAS PASS...POLEBRIDGE $$
856 WWUS45 KMSO 132003 WSWMSO URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE MISSOULA MT 103 PM MST SUN DEC 13 2015 MTZ043-141800- /O.CAN.KMSO.WS.W.0010.000000T0000Z-151215T0600Z/ /O.EXA.KMSO.WW.Y.0050.000000T0000Z-151214T1800Z/ 103 PM MST SUN DEC 13 2015 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 11 AM MST MONDAY... ...WINTER STORM WARNING IS CANCELLED... * IMPACTS/TIMING: LIGHT TO MODERATE SNOW WILL CONTINUE TO CAUSE SLICK SNOW COVERED ROADWAYS. SNOW SHOWERS WILL LINGER INTO MONDAY MORNING AND LIKELY IMPACT THE MORNING COMMUTE... ESPECIALLY FOR AREAS FROM SEELEY LAKE SOUTH. * SNOW ACCUMULATIONS: ADDITIONAL 2 TO 4 INCHES. * LOCATIONS IMPACTED INCLUDE...HIGHWAY 200 BONNER TO GREENOUGH... HIGHWAY 83 SEELEY LAKE TO CONDON...I-90 EAST MISSOULA TO BEARMOUTH $$ MTZ001-132115- /O.CAN.KMSO.WW.Y.0050.000000T0000Z-151214T1800Z/ 103 PM MST SUN DEC 13 2015 ...WINTER WEATHER ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN MISSOULA HAS CANCELLED THE WINTER WEATHER ADVISORY. ADDITIONAL SNOW SHOWERS ARE EXPECTED THIS AFTERNOON AS A FRONT PASSES TO THE SOUTH OF THE AREA. ADDITIONALLY, A FEW LINGERING SHOWERS ARE POSSIBLE TONIGHT AND INTO MONDAY. HOWEVER, IMPACTS TO TRAVEL SHOULD BE MINIMAL. $$ IDZ005-006-008-009-MTZ004-006-141800- /O.CON.KMSO.WS.W.0010.000000T0000Z-151214T1800Z/ 103 PM MST SUN DEC 13 2015 /1203 PM PST SUN DEC 13 2015/ ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST /10 AM PST/ MONDAY... * IMPACTS/TIMING: PERIODS OF MODERATE TO HEAVY SNOWFALL AND BLOWING SNOW WILL CONTINUE TO CREATE HAZARDOUS TRAVEL TODAY. WHILE THE MAIN PERIOD OF CONTINUOUS HEAVY SNOW HAS PASSED, SEVERAL ADDITIONAL ROUNDS OF MODERATE TO HEAVY SNOW ARE POSSIBLE THIS AFTERNOON AND EVENING. IN ADDITION... CONTINUED SNOW SHOWERS MAY LINGER INTO THE MORNING COMMUTE. THUS... ADDITIONAL TRAVEL IMPACTS ARE LIKELY. * SNOW ACCUMULATIONS: ADDITIONAL SNOWFALL OF 4 TO 6 INCHES FOR MOUNTAIN PASSES AND OTHER HIGHER ELEVATIONS...WITH LOCALLY HIGHER AMOUNTS. LOWER VALLEYS... INCLUDING THE HIGHWAY 12, HIGHWAY 95... AND INTERSTATE 90 CORRIDORS... COULD RECEIVE 2 TO 4 INCHES. * LOCATIONS IMPACTED INCLUDE...ELK RIVER...HIGHWAY 11 PIERCE TO HEADQUARTERS...PIERCE...DIXIE...ELK CITY...HIGHWAY 12 LOWELL TO LOLO PASS...HIGHWAY 95 SLATE CREEK TO RIGGINS...WHITE BIRD GRADE...SHOUP...EVARO HILL...HIGHWAY 200 THOMPSON FALLS TO PLAINS...HIGHWAY 200 TROUT CREEK TO HERON...I-90 LOOKOUT PASS TO HAUGAN...HIGHWAY 93 SULA TO LOST TRAIL PASS...LOLO PASS $$ IDZ010-MTZ007-141800- /O.CON.KMSO.WS.W.0010.000000T0000Z-151215T0600Z/ 103 PM MST SUN DEC 13 2015 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MST MONDAY... * IMPACTS/TIMING: PERIODS OF MODERATE TO HEAVY SNOWFALL AND BLOWING SNOW WILL CREATE HAZARDOUS TRAVEL TODAY AND MONDAY. THE PERIOD OF HEAVIEST SNOW WILL OCCUR EARLY MONDAY MORNING. GREATEST TRAVEL IMPACTS ARE EXPECTED ALONG INTERSTATE 90 FROM DEER LODGE THROUGH BUTTE AND HOMESTAKE PASS, AND ALONG HIGHWAY 38 FROM LEADORE TO GILMORE SUMMIT. * SNOW ACCUMULATIONS: 5 TO 10 INCHES BELOW 6000 FEET... AND 8 INCHES TO A FOOT POSSIBLE FOR MOUNTAIN PASSES AND OTHER HIGHER ELEVATIONS... WITH LOCALLY HIGHER AMOUNTS. * WINDS: WEST-SOUTHWEST 15 TO 25 MPH WITH GUSTS UP TO 40 MPH. BLOWING SNOW AND LOW VISIBILITY LIKELY IN EXPOSED AREAS. * LOCATIONS IMPACTED INCLUDE...BANNOCK PASS...HIGHWAY 28 TENDOY TO LONE PINE...HIGHWAY 93 LOST TRAIL PASS TO GIBBONSVILLE... LEMHI PASS...SALMON...BUTTE...GEORGETOWN LAKE...HIGHWAY 12 GARRISON TO ELLISTON...HOMESTAKE PASS...MACDONALD PASS... HIGHWAY 200 BONNER TO GREENOUGH...HIGHWAY 83 SEELEY LAKE TO CONDON...I-90 EAST MISSOULA TO BEARMOUTH $$ MTZ003-141800- /O.CON.KMSO.WW.Y.0050.000000T0000Z-151214T1800Z/ 103 PM MST SUN DEC 13 2015 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST MONDAY... * IMPACTS/TIMING: A MIX OF RAIN AND SNOW WILL CONTINUE THIS AFTERNOON... BEFORE CHANGING TO ALL SNOW THIS EVENING AS A COLD FRONT MOVES THROUGH. SCATTERED SNOW SHOWERS ARE THEN EXPECTED TO CONTINUE OVERNIGHT. EXPECT QUICKLY CHANGING ROAD CONDITIONS AS SNOWFALL WILL BE HIGHLY LOCALIZED, AND COULD IMPACT THE MONDAY MORNING COMMUTE. * SNOW ACCUMULATIONS: TRACE TO 3 INCHES. * LOCATIONS IMPACTED INCLUDE...FLATHEAD LAKE...FLATHEAD VALLEY... MISSION VALLEY...POLSON $$ MTZ005-141800- /O.CON.KMSO.WW.Y.0050.000000T0000Z-151214T1800Z/ 103 PM MST SUN DEC 13 2015 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST MONDAY... * IMPACTS/TIMING: A MIX OF RAIN AND SNOW WILL CONTINUE THIS AFTERNOON... BEFORE CHANGING TO ALL SNOW THIS EVENING AS A COLD FRONT MOVES THROUGH. FOR THE CENTRAL AND SOUTHERN BITTERROOT VALLEY, EXPECT LIGHT TO MODERATE SNOW TO CONTINUE INTO THE NIGHT, LEADING TO A POTENTIALLY DIFFICULT MONDAY MORNING COMMUTE. * SNOW ACCUMULATIONS: TRACE TO 3 INCHES IN THE MISSOULA VALLEY...AND 2 TO 5 INCHES IN THE CENTRAL AND SOUTHERN BITTERROOT VALLEY BY MONDAY MORNING. * LOCATIONS IMPACTED INCLUDE...BITTERROOT VALLEY...MISSOULA $$ MTZ002-141800- /O.CON.KMSO.WW.Y.0050.000000T0000Z-151214T1800Z/ 103 PM MST SUN DEC 13 2015 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST MONDAY... * IMPACTS/TIMING: LIGHT TO MODERATE SNOW WILL CONTINUE TO CAUSE SLICK, SNOW COVERED ROADWAYS. SNOW SHOWERS WILL CONTINUE INTO MONDAY MORNING AND MAY IMPACT THE MORNING COMMUTE. * SNOW ACCUMULATIONS: 1 TO 3 ADDITIONAL INCHES IN THE VALLEYS... AND 3 TO 6 INCHES IN HIGHER ELEVATIONS... INCLUDING HIGHWAY 2 FROM ESSEX TO MARIAS PASS. * LOCATIONS IMPACTED INCLUDE...BAD ROCK CANYON...ESSEX...HIGHWAY 83 BIGFORK TO SWAN LAKE...MARIAS PASS...POLEBRIDGE $$ IDZ007-141800- /O.CON.KMSO.WW.Y.0050.000000T0000Z-151214T1800Z/ 1203 PM PST SUN DEC 13 2015 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST MONDAY ABOVE 3000 FEET... * IMPACTS/TIMING: A MIX OF SNOW AND RAIN IS EXPECTED TO CHANGE TO ALL SNOW BY THIS EVENING. SLICK... SNOW-COVERED ROADS CAN BE EXPECTED TONIGHT THROUGH MONDAY MORNING... POTENTIALLY IMPACTING THE MORNING COMMUTE. * SNOW ACCUMULATIONS: 2 TO 4 INCHES BY MONDAY MORNING... WITH LOCALLY HIGHER AMOUNTS POSSIBLE. * LOCATIONS IMPACTED INCLUDE...CAMAS PRAIRIE...GRANGEVILLE AND VICINITY $$
237 WWUS45 KMSO 132305 WSWMSO URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE MISSOULA MT 405 PM MST SUN DEC 13 2015 MTZ004-141800- /O.CAN.KMSO.WS.W.0010.000000T0000Z-151214T1800Z/ /O.EXA.KMSO.WW.Y.0050.000000T0000Z-151214T1800Z/ 405 PM MST SUN DEC 13 2015 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 11 AM MST MONDAY... THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A WINTER WEATHER ADVISORY FOR HAZARDOUS DRIVING CONDITIONS...WHICH IS IN EFFECT UNTIL 11 AM MST MONDAY. * IMPACTS/TIMING: LIGHT TO MODERATE SNOW WILL CONTINUE TO CAUSE SLICK...SNOW COVERED ROADWAYS AND IMPACT THE MONDAY MORNING COMMUTE. * SNOW ACCUMULATIONS: ADDITIONAL 2 TO 4 INCHES OVER LOOKOUT PASS. 1 TO 3 INCHES ELSEWHERE. * LOCATIONS IMPACTED INCLUDE...EVARO HILL...HIGHWAY 200 THOMPSON FALLS TO PLAINS...HIGHWAY 200 TROUT CREEK TO HERON...I-90 LOOKOUT PASS TO HAUGAN $$ IDZ005-141800- /O.CAN.KMSO.WS.W.0010.000000T0000Z-151214T1800Z/ /O.EXA.KMSO.WW.Y.0050.000000T0000Z-151214T1800Z/ 305 PM PST SUN DEC 13 2015 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 10 AM PST MONDAY... THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A WINTER WEATHER ADVISORY FOR HAZARDOUS DRIVING CONDITIONS...WHICH IS IN EFFECT UNTIL 10 AM PST MONDAY. * IMPACTS/TIMING: LIGHT TO MODERATE SNOW WILL CONTINUE TO CAUSE SLICK...SNOW COVERED ROADWAYS AND IMPACT DRIVING CONDITIONS THROUGH MONDAY MORNING. * SNOW ACCUMULATIONS: ADDITIONAL 1 TO 3 INCHES. * LOCATIONS IMPACTED INCLUDE...ELK RIVER...HIGHWAY 11 PIERCE TO HEADQUARTERS...PIERCE $$ IDZ006-008-009-MTZ006-141800- /O.CON.KMSO.WS.W.0010.000000T0000Z-151214T1800Z/ 405 PM MST SUN DEC 13 2015 /305 PM PST SUN DEC 13 2015/ ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST /10 AM PST/ MONDAY... * IMPACTS/TIMING: PERIODS OF MODERATE TO HEAVY SNOWFALL AND BLOWING SNOW WILL CONTINUE TO CREATE HAZARDOUS TRAVEL TODAY. WHILE THE MAIN PERIOD OF CONTINUOUS HEAVY SNOW HAS PASSED... SEVERAL ADDITIONAL ROUNDS OF MODERATE TO HEAVY SNOW ARE POSSIBLE THIS AFTERNOON AND EVENING. IN ADDITION... CONTINUED SNOW SHOWERS MAY LINGER INTO THE MORNING COMMUTE. THUS... ADDITIONAL TRAVEL IMPACTS ARE LIKELY. * SNOW ACCUMULATIONS: ADDITIONAL SNOWFALL OF 4 TO 6 INCHES FOR MOUNTAIN PASSES AND OTHER HIGHER ELEVATIONS...WITH LOCALLY HIGHER AMOUNTS. LOWER VALLEYS... INCLUDING THE HIGHWAY 12... HIGHWAY 95... AND INTERSTATE 90 CORRIDORS... COULD RECEIVE 2 TO 4 INCHES. * LOCATIONS IMPACTED INCLUDE...DIXIE...ELK CITY...HIGHWAY 12 LOWELL TO LOLO PASS...HIGHWAY 95 SLATE CREEK TO RIGGINS... WHITE BIRD GRADE...SHOUP...HIGHWAY 93 SULA TO LOST TRAIL PASS... LOLO PASS $$ IDZ010-MTZ007-142315- /O.CON.KMSO.WS.W.0010.000000T0000Z-151215T0600Z/ 405 PM MST SUN DEC 13 2015 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MST MONDAY... * IMPACTS/TIMING: PERIODS OF MODERATE TO HEAVY SNOWFALL AND BLOWING SNOW WILL CREATE HAZARDOUS TRAVEL TODAY AND MONDAY. THE PERIOD OF HEAVIEST SNOW WILL OCCUR EARLY MONDAY MORNING. GREATEST TRAVEL IMPACTS ARE EXPECTED ALONG INTERSTATE 90 FROM DEER LODGE THROUGH BUTTE AND HOMESTAKE PASS... AND ALONG HIGHWAY 38 FROM LEADORE TO GILMORE SUMMIT. * SNOW ACCUMULATIONS: 5 TO 10 INCHES BELOW 6000 FEET... AND 8 INCHES TO A FOOT POSSIBLE FOR MOUNTAIN PASSES AND OTHER HIGHER ELEVATIONS... WITH LOCALLY HIGHER AMOUNTS. * WINDS: WEST-SOUTHWEST 15 TO 25 MPH WITH GUSTS UP TO 40 MPH. BLOWING SNOW AND LOW VISIBILITY LIKELY IN EXPOSED AREAS. * LOCATIONS IMPACTED INCLUDE...BANNOCK PASS...HIGHWAY 28 TENDOY TO LONE PINE...HIGHWAY 93 LOST TRAIL PASS TO GIBBONSVILLE... LEMHI PASS...SALMON...BUTTE...GEORGETOWN LAKE...HIGHWAY 12 GARRISON TO ELLISTON...HOMESTAKE PASS...MACDONALD PASS $$ MTZ003-141800- /O.CON.KMSO.WW.Y.0050.000000T0000Z-151214T1800Z/ 405 PM MST SUN DEC 13 2015 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST MONDAY... * IMPACTS/TIMING: A MIX OF RAIN AND SNOW WILL CONTINUE THIS AFTERNOON... BEFORE CHANGING TO ALL SNOW THIS EVENING AS A COLD FRONT MOVES THROUGH. SCATTERED SNOW SHOWERS ARE THEN EXPECTED TO CONTINUE OVERNIGHT. EXPECT QUICKLY CHANGING ROAD CONDITIONS AS SNOWFALL WILL BE HIGHLY LOCALIZED... AND COULD IMPACT THE MONDAY MORNING COMMUTE. * SNOW ACCUMULATIONS: TRACE TO 3 INCHES. * LOCATIONS IMPACTED INCLUDE...FLATHEAD LAKE...FLATHEAD VALLEY... MISSION VALLEY...POLSON $$ MTZ005-141800- /O.CON.KMSO.WW.Y.0050.000000T0000Z-151214T1800Z/ 405 PM MST SUN DEC 13 2015 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST MONDAY... * IMPACTS/TIMING: A MIX OF RAIN AND SNOW WILL CONTINUE THIS AFTERNOON... BEFORE CHANGING TO ALL SNOW THIS EVENING AS A COLD FRONT MOVES THROUGH. FOR THE CENTRAL AND SOUTHERN BITTERROOT VALLEY... EXPECT LIGHT TO MODERATE SNOW TO CONTINUE INTO THE NIGHT... LEADING TO A POTENTIALLY DIFFICULT MONDAY MORNING COMMUTE. * SNOW ACCUMULATIONS: TRACE TO 3 INCHES IN THE MISSOULA VALLEY... AND 2 TO 5 INCHES IN THE CENTRAL AND SOUTHERN BITTERROOT VALLEY BY MONDAY MORNING. * LOCATIONS IMPACTED INCLUDE...BITTERROOT VALLEY...MISSOULA $$ MTZ002-043-141800- /O.CON.KMSO.WW.Y.0050.000000T0000Z-151214T1800Z/ 405 PM MST SUN DEC 13 2015 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST MONDAY... * IMPACTS/TIMING: LIGHT TO MODERATE SNOW WILL CONTINUE TO CAUSE SLICK... SNOW COVERED ROADWAYS. SNOW SHOWERS WILL CONTINUE INTO MONDAY MORNING AND MAY IMPACT THE MORNING COMMUTE. * SNOW ACCUMULATIONS: 1 TO 3 ADDITIONAL INCHES IN THE VALLEYS... AND 3 TO 6 INCHES IN HIGHER ELEVATIONS... INCLUDING HIGHWAY 2 FROM ESSEX TO MARIAS PASS. * LOCATIONS IMPACTED INCLUDE...BAD ROCK CANYON...ESSEX...HIGHWAY 83 BIGFORK TO SWAN LAKE...MARIAS PASS...POLEBRIDGE...HIGHWAY 200 BONNER TO GREENOUGH...HIGHWAY 83 SEELEY LAKE TO CONDON...I- 90 EAST MISSOULA TO BEARMOUTH $$ IDZ007-141800- /O.CON.KMSO.WW.Y.0050.000000T0000Z-151214T1800Z/ 305 PM PST SUN DEC 13 2015 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST MONDAY ABOVE 3000 FEET... * IMPACTS/TIMING: A MIX OF SNOW AND RAIN IS EXPECTED TO CHANGE TO ALL SNOW BY THIS EVENING. SLICK... SNOW-COVERED ROADS CAN BE EXPECTED TONIGHT THROUGH MONDAY MORNING... POTENTIALLY IMPACTING THE MORNING COMMUTE. * SNOW ACCUMULATIONS: 2 TO 4 INCHES BY MONDAY MORNING... WITH LOCALLY HIGHER AMOUNTS POSSIBLE. * LOCATIONS IMPACTED INCLUDE...CAMAS PRAIRIE...GRANGEVILLE AND VICINITY $$
422 WWUS45 KMSO 140429 WSWMSO URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE MISSOULA MT 929 PM MST SUN DEC 13 2015 IDZ008-141800- /O.CAN.KMSO.WS.W.0010.000000T0000Z-151214T1800Z/ /O.EXA.KMSO.WW.Y.0050.000000T0000Z-151214T1800Z/ 829 PM PST SUN DEC 13 2015 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 10 AM PST MONDAY ABOVE 3000 FEET FOR HAZARDOUS DRIVING CONDITIONS OVER WHITEBIRD GRADE... THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A WINTER WEATHER ADVISORY FOR HAZARDOUS DRIVING CONDITIONS ABOVE 3000 FEET OVER WHITEBIRD GRADE... WHICH IS IN EFFECT UNTIL 10 AM PST MONDAY. * IMPACTS/TIMING: OCCASIONAL LIGHT SNOW OVERNIGHT WILL CREATE HAZARDOUS DRIVING CONDITIONS OVER WHITEBIRD GRADE THROUGH MONDAY MORNING. * SNOW ACCUMULATIONS: ADDITIONAL 1 TO 2 INCHES OVER WHITEBIRD GRADE. $$ MTZ002-003-140530- /O.CAN.KMSO.WW.Y.0050.000000T0000Z-151214T1800Z/ 929 PM MST SUN DEC 13 2015 ...WINTER WEATHER ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN MISSOULA HAS CANCELLED THE WINTER WEATHER ADVISORY. $$ IDZ006-009-MTZ006-141800- /O.CON.KMSO.WS.W.0010.000000T0000Z-151214T1800Z/ 929 PM MST SUN DEC 13 2015 /829 PM PST SUN DEC 13 2015/ ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST /10 AM PST/ MONDAY... * IMPACTS/TIMING: PERIODS OF MODERATE TO HEAVY SNOWFALL AND BLOWING SNOW WILL CONTINUE TO CREATE HAZARDOUS TRAVEL TODAY. WHILE THE MAIN PERIOD OF CONTINUOUS HEAVY SNOW HAS PASSED... SEVERAL ADDITIONAL ROUNDS OF MODERATE TO HEAVY SNOW ARE POSSIBLE THIS AFTERNOON AND EVENING. IN ADDITION... CONTINUED SNOW SHOWERS MAY LINGER INTO THE MORNING COMMUTE. THUS... ADDITIONAL TRAVEL IMPACTS ARE LIKELY. * SNOW ACCUMULATIONS: ADDITIONAL SNOWFALL OF 4 TO 6 INCHES FOR MOUNTAIN PASSES AND OTHER HIGHER ELEVATIONS...WITH LOCALLY HIGHER AMOUNTS. LOWER VALLEYS... INCLUDING THE HIGHWAY 12... HIGHWAY 95... AND INTERSTATE 90 CORRIDORS... COULD RECEIVE 2 TO 4 INCHES. * LOCATIONS IMPACTED INCLUDE...DIXIE...ELK CITY...HIGHWAY 12 LOWELL TO LOLO PASS...SHOUP...HIGHWAY 93 SULA TO LOST TRAIL PASS...LOLO PASS $$ IDZ010-MTZ007-150430- /O.CON.KMSO.WS.W.0010.000000T0000Z-151215T0600Z/ 929 PM MST SUN DEC 13 2015 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MST MONDAY... * IMPACTS/TIMING: PERIODS OF MODERATE TO HEAVY SNOWFALL AND BLOWING SNOW WILL CREATE HAZARDOUS TRAVEL TODAY AND MONDAY. THE PERIOD OF HEAVIEST SNOW WILL OCCUR EARLY MONDAY MORNING. GREATEST TRAVEL IMPACTS ARE EXPECTED ALONG INTERSTATE 90 FROM DEER LODGE THROUGH BUTTE AND HOMESTAKE PASS... AND ALONG HIGHWAY 38 FROM LEADORE TO GILMORE SUMMIT. * SNOW ACCUMULATIONS: 5 TO 10 INCHES BELOW 6000 FEET... AND 8 INCHES TO A FOOT POSSIBLE FOR MOUNTAIN PASSES AND OTHER HIGHER ELEVATIONS... WITH LOCALLY HIGHER AMOUNTS. * WINDS: WEST-SOUTHWEST 15 TO 25 MPH WITH GUSTS UP TO 40 MPH. BLOWING SNOW AND LOW VISIBILITY LIKELY IN EXPOSED AREAS. * LOCATIONS IMPACTED INCLUDE...BANNOCK PASS...HIGHWAY 28 TENDOY TO LONE PINE...HIGHWAY 93 LOST TRAIL PASS TO GIBBONSVILLE... LEMHI PASS...SALMON...BUTTE...GEORGETOWN LAKE...HIGHWAY 12 GARRISON TO ELLISTON...HOMESTAKE PASS...MACDONALD PASS $$ MTZ005-141800- /O.CON.KMSO.WW.Y.0050.000000T0000Z-151214T1800Z/ 929 PM MST SUN DEC 13 2015 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST MONDAY... * IMPACTS/TIMING: FOR THE CENTRAL AND SOUTHERN BITTERROOT VALLEY...EXPECT LIGHT TO MODERATE SNOW TO CONTINUE THROUGH THE OVERNIGHT...LEADING TO A POTENTIALLY DIFFICULT MONDAY MORNING COMMUTE. * SNOW ACCUMULATIONS: 2 TO 5 INCHES IN THE CENTRAL AND SOUTHERN BITTERROOT VALLEY BY MONDAY MORNING. * LOCATIONS IMPACTED INCLUDE...BITTERROOT VALLEY $$ MTZ043-141800- /O.CON.KMSO.WW.Y.0050.000000T0000Z-151214T1800Z/ 929 PM MST SUN DEC 13 2015 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST MONDAY... * IMPACTS/TIMING: LIGHT SNOW WILL CONTINUE TO CAUSE SLICK...SNOW COVERED ROADWAYS. SNOW SHOWERS WILL CONTINUE INTO MONDAY MORNING AND MAY IMPACT THE MORNING COMMUTE. * SNOW ACCUMULATIONS: ADDITIONAL 1 TO 3 INCHES. * LOCATIONS IMPACTED INCLUDE...HIGHWAY 200 BONNER TO GREENOUGH... HIGHWAY 83 SEELEY LAKE TO CONDON...I-90 EAST MISSOULA TO BEARMOUTH $$ MTZ004-141800- /O.CON.KMSO.WW.Y.0050.000000T0000Z-151214T1800Z/ 929 PM MST SUN DEC 13 2015 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST MONDAY... * IMPACTS/TIMING: LIGHT SNOW WILL CONTINUE TO CAUSE SLICK...SNOW COVERED ROADWAYS AND IMPACT THE MONDAY MORNING COMMUTE. * SNOW ACCUMULATIONS: ADDITIONAL 1 TO 3 INCHES OVER LOOKOUT PASS. AROUND 1 INCH ELSEWHERE. * LOCATIONS IMPACTED INCLUDE...EVARO HILL...HIGHWAY 200 THOMPSON FALLS TO PLAINS...HIGHWAY 200 TROUT CREEK TO HERON...I-90 LOOKOUT PASS TO HAUGAN $$ IDZ005-141800- /O.CON.KMSO.WW.Y.0050.000000T0000Z-151214T1800Z/ 829 PM PST SUN DEC 13 2015 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST MONDAY... * IMPACTS/TIMING: LIGHT SNOW WILL CONTINUE TO CAUSE SLICK...SNOW COVERED ROADWAYS AND IMPACT DRIVING CONDITIONS THROUGH MONDAY MORNING. * SNOW ACCUMULATIONS: ADDITIONAL 1 TO 2 INCHES. * LOCATIONS IMPACTED INCLUDE...ELK RIVER...HIGHWAY 11 PIERCE TO HEADQUARTERS...PIERCE $$ IDZ007-141800- /O.CON.KMSO.WW.Y.0050.000000T0000Z-151214T1800Z/ 829 PM PST SUN DEC 13 2015 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST MONDAY ABOVE 3000 FEET... * IMPACTS/TIMING: LIGHT SNOW WILL CONTINUE OVERNIGHT...CREATING HAZARDOUS DRIVING CONDITIONS THROUGH MONDAY MID MORNING. * SNOW ACCUMULATIONS: ADDITIONAL 1 TO 2 INCHES. * LOCATIONS IMPACTED INCLUDE...CAMAS PRAIRIE...GRANGEVILLE AND VICINITY $$
539 WWUS45 KMSO 141012 WSWMSO URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE MISSOULA MT 312 AM MST MON DEC 14 2015 IDZ006-141800- /O.CAN.KMSO.WS.W.0010.000000T0000Z-151214T1800Z/ /O.EXA.KMSO.WW.Y.0050.000000T0000Z-151214T1800Z/ 212 AM PST MON DEC 14 2015 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 10 AM PST THIS MORNING ABOVE 3000 FEET... ...WINTER STORM WARNING IS CANCELLED... THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A WINTER WEATHER ADVISORY FOR POSSIBLE TRAVEL IMPACTS DUE TO SNOW ABOVE 3000 FEET... WHICH IS IN EFFECT UNTIL 10 AM PST THIS MORNING. THE WINTER STORM WARNING HAS BEEN CANCELLED. * IMPACTS/TIMING: LIGHT TO MODERATE SNOW WILL CONTINUE TO CREATE POTENTIALLY DIFFICULT TRAVEL. * SNOW ACCUMULATIONS: 2 TO 5 INCHES. * LOCATIONS IMPACTED INCLUDE...DIXIE...ELK CITY...HIGHWAY 12 LOWELL TO LOLO PASS $$ IDZ005-MTZ004-141115- /O.CAN.KMSO.WW.Y.0050.000000T0000Z-151214T1800Z/ 312 AM MST MON DEC 14 2015 /212 AM PST MON DEC 14 2015/ ...WINTER WEATHER ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN MISSOULA HAS CANCELLED THE WINTER WEATHER ADVISORY. $$ IDZ009-MTZ006-141800- /O.CON.KMSO.WS.W.0010.000000T0000Z-151214T1800Z/ 312 AM MST MON DEC 14 2015 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST THIS MORNING... * IMPACTS/TIMING: WHILE THE MAIN PERIOD OF HEAVY SNOW HAS PASSED...RESIDUAL MODERATE SNOW WILL CONTINUE THROUGH THE MORNING AND CREATE HAZARDOUS TRAVEL. * SNOW ACCUMULATIONS: 4 TO 6 INCHES FOR MOUNTAIN PASSES AND OTHER HIGHER ELEVATIONS. LOWER VALLEYS INCLUDING THE HIGHWAY 12... HIGHWAY 95... AND INTERSTATE 90 CORRIDORS WILL SEE AN ADDITIONAL 2 TO 4 INCHES. * LOCATIONS IMPACTED INCLUDE...SHOUP...HIGHWAY 93 SULA TO LOST TRAIL PASS...LOLO PASS $$ IDZ010-MTZ007-150600- /O.CON.KMSO.WS.W.0010.000000T0000Z-151215T0600Z/ 312 AM MST MON DEC 14 2015 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MST THIS EVENING... * IMPACTS/TIMING: PERIODS OF MODERATE TO HEAVY SNOWFALL AND BLOWING SNOW WILL CREATE HAZARDOUS TRAVEL TODAY. THE PERIOD OF HEAVIEST SNOW WILL OCCUR THIS MORNING WITH THE GREATEST TRAVEL IMPACTS EXPECTED ALONG INTERSTATE 90 FROM DEER LODGE THROUGH BUTTE AND HOMESTAKE PASS... AND ALONG HIGHWAY 38 FROM LEADORE TO GILMORE SUMMIT. * SNOW ACCUMULATIONS: 5 TO 10 INCHES BELOW 6000 FEET... AND 8 INCHES TO A FOOT FOR MOUNTAIN PASSES AND OTHER HIGHER ELEVATIONS. * WINDS: WEST-SOUTHWEST 15 TO 25 MPH WITH GUSTS UP TO 35 MPH. BLOWING SNOW AND LOW VISIBILITY WILL OCCUR IN EXPOSED AREAS. * LOCATIONS IMPACTED INCLUDE...BANNOCK PASS...HIGHWAY 28 TENDOY TO LONE PINE...HIGHWAY 93 LOST TRAIL PASS TO GIBBONSVILLE... LEMHI PASS...SALMON...BUTTE...GEORGETOWN LAKE...HIGHWAY 12 GARRISON TO ELLISTON...HOMESTAKE PASS...MACDONALD PASS $$ MTZ005-141800- /O.CON.KMSO.WW.Y.0050.000000T0000Z-151214T1800Z/ 312 AM MST MON DEC 14 2015 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THIS MORNING... * IMPACTS/TIMING: FOR THE CENTRAL AND SOUTHERN BITTERROOT VALLEY...EXPECT LIGHT TO MODERATE SNOW TO CREATE A POTENTIALLY DIFFICULT MORNING COMMUTE. * SNOW ACCUMULATIONS: 2 TO 5 INCHES IN THE CENTRAL AND SOUTHERN BITTERROOT VALLEY. * LOCATIONS IMPACTED INCLUDE...BITTERROOT VALLEY. $$ MTZ043-141800- /O.CON.KMSO.WW.Y.0050.000000T0000Z-151214T1800Z/ 312 AM MST MON DEC 14 2015 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THIS MORNING... * IMPACTS/TIMING: LIGHT SNOW WILL CONTINUE TO CAUSE SLICK TRAVEL CONDITIONS AND MAY IMPACT THE MORNING COMMUTE. * SNOW ACCUMULATIONS: 1 TO 3 INCHES. * LOCATIONS IMPACTED INCLUDE...HIGHWAY 200 BONNER TO GREENOUGH... HIGHWAY 83 SEELEY LAKE TO CONDON...I-90 EAST MISSOULA TO BEARMOUTH $$ IDZ007-141800- /O.CON.KMSO.WW.Y.0050.000000T0000Z-151214T1800Z/ 212 AM PST MON DEC 14 2015 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST THIS MORNING ABOVE 3000 FEET... * IMPACTS/TIMING: LIGHT SNOW WILL CONTINUE TO CAUSE SLICK TRAVEL CONDITIONS THIS MORNING. * SNOW ACCUMULATIONS: 1 TO 2 INCHES. * LOCATIONS IMPACTED INCLUDE...CAMAS PRAIRIE...GRANGEVILLE AND VICINITY $$ IDZ008-141800- /O.CON.KMSO.WW.Y.0050.000000T0000Z-151214T1800Z/ 212 AM PST MON DEC 14 2015 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST THIS MORNING ABOVE 3000 FEET FOR...WHITE BIRD GRADE... THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A WINTER WEATHER ADVISORY FOR HAZARDOUS DRIVING CONDITIONS ABOVE 3000 FEET OVER WHITEBIRD GRADE... WHICH IS IN EFFECT UNTIL 10 AM PST MONDAY. * IMPACTS/TIMING: OCCASIONAL LIGHT SNOW OVERNIGHT WILL CREATE DIFFICULT DRIVING CONDITIONS OVER WHITEBIRD GRADE THIS MORNING. * SNOW ACCUMULATIONS: 1 TO 2 INCHES OVER WHITEBIRD GRADE. $$
893 WWUS45 KMSO 141755 WSWMSO URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE MISSOULA MT 1055 AM MST MON DEC 14 2015 IDZ009-MTZ006-141900- /O.CAN.KMSO.WS.W.0010.000000T0000Z-151214T1800Z/ 1055 AM MST MON DEC 14 2015 ...WINTER STORM WARNING IS CANCELLED... THE NATIONAL WEATHER SERVICE IN MISSOULA HAS CANCELLED THE WINTER STORM WARNING. $$ IDZ006>008-MTZ005-141900- /O.CAN.KMSO.WW.Y.0050.000000T0000Z-151214T1800Z/ 1055 AM MST MON DEC 14 2015 /955 AM PST MON DEC 14 2015/ ...WINTER WEATHER ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN MISSOULA HAS CANCELLED THE WINTER WEATHER ADVISORY. $$ IDZ010-MTZ007-150600- /O.CON.KMSO.WS.W.0010.000000T0000Z-151215T0600Z/ 1055 AM MST MON DEC 14 2015 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MST THIS EVENING... * IMPACTS/TIMING: PERIODS OF MODERATE TO HEAVY SNOWFALL AND BLOWING SNOW WILL CONTINUE TO CREATE HAZARDOUS TRAVEL TODAY AND THIS EVENING. THE PERIOD OF HEAVIEST SNOW WILL OCCUR THIS AFTERNOON WITH THE GREATEST TRAVEL IMPACTS EXPECTED ALONG INTERSTATE 90 FROM DEER LODGE THROUGH BUTTE AND HOMESTAKE PASS... AND ALONG HIGHWAY 38 FROM LEADORE TO GILMORE SUMMIT. * SNOW ACCUMULATIONS: AN ADDITIONAL 2 TO 5 INCHES ARE EXPECTED THROUGH THIS EVENING * WINDS: WESTERLY WINDS 15 TO 25 MPH WITH GUSTS UP TO 35 MPH. BLOWING SNOW AND LOW VISIBILITY WILL OCCUR IN EXPOSED AREAS. * LOCATIONS IMPACTED INCLUDE...BANNOCK PASS...HIGHWAY 28 TENDOY TO LONE PINE...HIGHWAY 93 LOST TRAIL PASS TO GIBBONSVILLE... LEMHI PASS...SALMON...BUTTE...GEORGETOWN LAKE...HIGHWAY 12 GARRISON TO ELLISTON...HOMESTAKE PASS...MACDONALD PASS $$ MTZ043-150000- /O.EXT.KMSO.WW.Y.0050.000000T0000Z-151215T0000Z/ 1055 AM MST MON DEC 14 2015 ...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 5 PM MST THIS AFTERNOON... * IMPACTS/TIMING: LIGHT SNOW WILL CONTINUE TO CAUSE SLICK TRAVEL CONDITIONS THROUGH THIS AFTERNOON. * SNOW ACCUMULATIONS: AN ADDITIONAL 1 TO 2 INCHES. * LOCATIONS IMPACTED INCLUDE...HIGHWAY 200 BONNER TO GREENOUGH... HIGHWAY 83 SEELEY LAKE TO CONDON...I-90 EAST MISSOULA TO BEARMOUTH $$
892 WWUS45 KMSO 150048 WSWMSO URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE MISSOULA MT 548 PM MST MON DEC 14 2015 IDZ010-MTZ007-150600- /O.CON.KMSO.WS.W.0010.000000T0000Z-151215T0600Z/ 548 PM MST MON DEC 14 2015 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MST THIS EVENING... * IMPACTS/TIMING: PERIODS OF MODERATE TO HEAVY SNOWFALL AND BLOWING SNOW WILL CONTINUE TO CREATE HAZARDOUS TRAVEL TODAY AND THIS EVENING. THE PERIOD OF HEAVIEST SNOW WILL OCCUR THIS AFTERNOON WITH THE GREATEST TRAVEL IMPACTS EXPECTED ALONG INTERSTATE 90 FROM DEER LODGE THROUGH BUTTE AND HOMESTAKE PASS... AND ALONG HIGHWAY 38 FROM LEADORE TO GILMORE SUMMIT. * SNOW ACCUMULATIONS: AN ADDITIONAL 2 TO 5 INCHES ARE EXPECTED THROUGH THIS EVENING * WINDS: WESTERLY WINDS 15 TO 25 MPH WITH GUSTS UP TO 35 MPH. BLOWING SNOW AND LOW VISIBILITY WILL OCCUR IN EXPOSED AREAS. * LOCATIONS IMPACTED INCLUDE...BANNOCK PASS...HIGHWAY 28 TENDOY TO LONE PINE...HIGHWAY 93 LOST TRAIL PASS TO GIBBONSVILLE... LEMHI PASS...SALMON...BUTTE...GEORGETOWN LAKE...HIGHWAY 12 GARRISON TO ELLISTON...HOMESTAKE PASS...MACDONALD PASS $$ IDZ008-151600- /O.NEW.KMSO.WW.Y.0051.151215T0048Z-151215T1600Z/ 448 PM PST MON DEC 14 2015 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 8 AM PST TUESDAY ABOVE 3500 FEET FOR...WHITE BIRD GRADE... THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A WINTER WEATHER ADVISORY FOR HAZARDOUS WINTER DRIVING CONDITIONS ABOVE 3500 FEET... WHICH IS IN EFFECT UNTIL 8 AM PST TUESDAY. * IMPACTS/TIMING: LIGHT SNOW THIS EVENING WILL CREATE HAZARDOUS DRIVING CONDITIONS OVER WHITEBIRD GRADE THROUGH TUESDAY MORNING. * SNOW ACCUMULATIONS: 1 TO 3 INCHES $$
761 WWUS45 KMSO 150411 WSWMSO URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE MISSOULA MT 911 PM MST MON DEC 14 2015 MTZ007-150515- /O.CAN.KMSO.WS.W.0010.000000T0000Z-151215T0600Z/ 911 PM MST MON DEC 14 2015 ...WINTER STORM WARNING IS CANCELLED... THE NATIONAL WEATHER SERVICE IN MISSOULA HAS CANCELLED THE WINTER STORM WARNING. $$ IDZ010-150600- /O.CON.KMSO.WS.W.0010.000000T0000Z-151215T0600Z/ 911 PM MST MON DEC 14 2015 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MST THIS EVENING... * IMPACTS/TIMING: PERIODS OF MODERATE TO HEAVY SNOWFALL AND BLOWING SNOW WILL CONTINUE TO CREATE HAZARDOUS TRAVEL THROUGH THIS EVENING ALONG HIGHWAY 38 FROM LEADORE TO GILMORE SUMMIT. * SNOW ACCUMULATIONS: ADDITIONAL 1 TO 3 INCHES THROUGH THIS EVENING * WINDS: WESTERLY WINDS 15 TO 25 MPH WITH GUSTS UP TO 35 MPH. BLOWING SNOW AND LOW VISIBILITY WILL OCCUR IN EXPOSED AREAS. * LOCATIONS IMPACTED INCLUDE...BANNOCK PASS...HIGHWAY 28 TENDOY TO LONE PINE...HIGHWAY 93 LOST TRAIL PASS TO GIBBONSVILLE... LEMHI PASS...SALMON $$ IDZ008-151600- /O.CON.KMSO.WW.Y.0051.000000T0000Z-151215T1600Z/ 811 PM PST MON DEC 14 2015 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 8 AM PST TUESDAY ABOVE 3500 FEET FOR...WHITE BIRD GRADE... THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A WINTER WEATHER ADVISORY FOR HAZARDOUS WINTER DRIVING CONDITIONS ABOVE 3500 FEET... WHICH IS IN EFFECT UNTIL 8 AM PST TUESDAY. * IMPACTS/TIMING: LIGHT SNOW THIS EVENING WILL CREATE HAZARDOUS DRIVING CONDITIONS OVER WHITEBIRD GRADE THROUGH TUESDAY MORNING. * SNOW ACCUMULATIONS: 1 TO 3 INCHES $$
823 WWUS45 KMSO 150544 WSWMSO URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE MISSOULA MT 1044 PM MST MON DEC 14 2015 IDZ010-150645- /O.CAN.KMSO.WS.W.0010.000000T0000Z-151215T0600Z/ 1044 PM MST MON DEC 14 2015 ...WINTER STORM WARNING IS CANCELLED... THE NATIONAL WEATHER SERVICE IN MISSOULA HAS CANCELLED THE WINTER STORM WARNING. $$ IDZ008-151600- /O.CON.KMSO.WW.Y.0051.000000T0000Z-151215T1600Z/ 944 PM PST MON DEC 14 2015 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 8 AM PST TUESDAY ABOVE 3500 FEET FOR...WHITE BIRD GRADE... THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A WINTER WEATHER ADVISORY FOR HAZARDOUS WINTER DRIVING CONDITIONS ABOVE 3500 FEET... WHICH IS IN EFFECT UNTIL 8 AM PST TUESDAY. * IMPACTS/TIMING: LIGHT SNOW WILL CREATE HAZARDOUS DRIVING CONDITIONS OVER WHITEBIRD GRADE THROUGH TUESDAY MORNING. * SNOW ACCUMULATIONS: 1 TO 3 INCHES $$
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 Dec 12, 2:40 AM PST, 11 hours 5 minutes earlier.
Area forecast discussion, Dec 12, 2:40 AM PST, 11 hours 5 minutes before
Area Forecast Discussion
National Weather Service Missoula MT
340 AM MST SAT DEC 12 2015
...Winter Travel Impacts tonight through Monday...
...Active Pattern with Much Cooler Temperatures Next Week...
.DISCUSSION...Snow showers continue to move through a portion of
west central Montana this morning, with light accumulations possible
mainly before noon. Fog and low clouds are also being observed
across the breadth of the region, so watch out for areas of
reduced visibility this morning.
The next weather system is currently just off the west coast and
is still on track to move through Idaho and western Montana
beginning late this evening. There is high confidence that this
upcoming weather system will bring travel impacts to high terrain
and over mountain passes, due to both snow and wind, tonight
through Monday. Valley locations also have high chances for snow
and travel impacts through Sunday and Monday. There are still some
subtle differences been model solutions for the upcoming weather
system, but there is generally high confidence that snow will
fall through north central Idaho and northwest Montana tonight
through Sunday, morning followed by southwest Montana and Lemhi
County, Idaho for late Sunday through Monday. Mountain passes,
including Lookout, Marias, Lolo, Lost Trail, MacDonald, and
Homestake, all have the opportunity to see 10-14 inches or more
snow accumulation. Periods of high snow rates and gusty winds
could make travel very difficult into Monday morning. Snow will
continue to linger through much of Monday, but snow rates are
expected to decrease through the day. Winter storm watches have
been issued for a number of counties in central Idaho and western
Montana, and the chance exists that more highlights may be added
in the near future.
From Tuesday onward, the weather for the Northern Rockies will
remain active. Northwest flow will keep mountain showers lingering
through mid to late week, with the next round of organized
precipitation occurring roughly Friday into next weekend. Beyond
then, the forecast models diverge and details become inconsistent.
Bottom line: expect a rather active week with cooler temperatures
and on-and-off shower activity, with brief breaks of quieter
weather in between.
&&
.AVIATION...Weak disturbances are passing through north central
Idaho and western Montana this morning with stratus, fog, and snow
showers creating the main weather impacts. The active nature of
the weather pattern should keep fog coverage from being too
widespread, but model soundings do show the potential for valley
fog through around 12/1700z. The next shortwave, with low cloud
cover and snow, is forecast to move through north central Idaho
and northwest Montana from around 12/1200z to 12/1800z, but snow
showers may linger into the afternoon in northwest Montana.
The main story for the upcoming weather pattern is a robust
weather system will move into the region tonight. Moderate to
heavy snow, along with gusty winds, will cause potentially
dangerous low level flying conditions in north central Idaho,
along the MT/ID border, and into northwest Montana through Sunday
morning. These conditions will transition into southwest Montana
Sunday evening through Monday. Winter storm watches and warnings
are in effect through Monday morning for this weather system.
&&
.MSO WATCHES/WARNINGS/ADVISORIES...
MT...Winter Storm Watch from this afternoon through Monday morning
Bitterroot/Sapphire Mountains...Lower Clark Fork Region.
Winter Storm Watch from Sunday afternoon through Monday morning
Butte/Blackfoot Region...Potomac/Seeley Lake Region.
ID...Winter Storm Watch from this afternoon through Monday morning
Lower Hells Canyon/Salmon River Region...Northern
Clearwater Mountains...Southern Clearwater Mountains...
Western Lemhi County.
Winter Storm Watch from Sunday afternoon through Monday morning
Eastern Lemhi County.
&&The office that day
Everything else NWS Missoula, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 12, 1:45 PM PST | Winter Weather Advisory | MSO | Clearwater, Idaho | 50 hr |
Nearby
Winter Storm Warnings in Montana, 2015Winter Storm Warnings in Idaho, 2015Every winter storm warning in 2015
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.