Alert archive / Montana / Wind Chill Advisories in 2009
Wind Chill Advisory 3, NWS Missoula, MT
NWS Missoula, MT issued this wind chill advisory at Mar 8, 2009, 2:23 PM MDT for 7 counties in Montana. It took effect at Mar 9, 2009, 12:00 AM MDT. It was in force for 13 hr.
The area
The counties it named.
The facts
- Issued
- Mar 8, 2009, 2:23 PM MDT (20:23 UTC)
- In effect from
- Mar 9, 2009, 12:00 AM MDT
- Expired
- Mar 9, 2009, 1:00 PM MDT
- In force
- 13 hr
- Issued by
- NWS Missoula, MT
Counties Deer Lodge County, MT, Flathead County, MT, Granite County, MT, Lake County, MT, Missoula County, MT, Powell County, MT, Silver Bow County, MT
The radar
The Missoula radar (KMSX), 44 km from the middle of the area, began a volume at 20:23 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
Great_falls, MT (KTFX), launched 12:00Z, 8.4 hours before the alert went out and 225 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
- 1673 m above ground
- 0-6 km bulk shear
- 69 kt
- 0-1 km storm-relative helicity
- -24 m²/s²
- 0-3 km storm-relative helicity
- -45 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 082023 WSWMSO URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE MISSOULA MT 223 PM MDT SUN MAR 8 2009 .SNOW SHOWERS WILL CONTINUE INTO THE EVENING HOURS AS A COLD UPPER LEVEL LOW PRESSURE SYSTEM HOLDS STEADY OVER THE NORTHERN ROCKIES REGION. THERE CONTINUES TO BE CONSIDERABLE ENHANCEMENT OF SHOWER ACTIVITY OVER THE IDAHO PANHANDLE...THEN EXTENDING ACROSS PORTIONS OF NORTHWEST MONTANA THIS AFTERNOON. ELSEWHERE...WESTERLY WINDS ALOFT CONCENTRATING SHOWERS OVER THE MOUNTAINOUS REGIONS THANKS TO UPSLOPE ENHANCEMENT. SHOWER ACTIVITY IS EXPECTED TO DECREASE TONIGHT. HOWEVER...ARCTIC AIR HAS ALREADY BEGUN TO SURGE ACROSS THE CONTINENTAL DIVIDE THANKS TO INCREASING NORTHEAST WINDS. THE COMBINATION OF STRONG WINDS AND COLD TEMPERATURES WILL CREATE WIND CHILLS WELL BELOW ZERO LATER TONIGHT AND INTO MONDAY MORNING. IDZ007-082130- /O.CAN.KMSO.WW.Y.0040.000000T0000Z-090309T0000Z/ OROFINO/GRANGEVILLE REGION- 123 PM PDT SUN MAR 8 2009 ...WINTER WEATHER ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN MISSOULA HAS CANCELLED THE WINTER WEATHER ADVISORY. ALTHOUGH SNOW SHOWERS ARE STILL POSSIBLE...ACCUMULATING SNOWFALL WILL BECOME MORE LOCALIZED. $$ MTZ002-090600- /O.NEW.KMSO.WC.Y.0003.090309T0600Z-090309T1900Z/ /O.CON.KMSO.WS.W.0009.000000T0000Z-090309T0000Z/ WEST GLACIER REGION- 223 PM MDT SUN MAR 8 2009 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 PM MDT THIS EVENING... ...WIND CHILL ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 1 PM MDT MONDAY... THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A WIND CHILL ADVISORY...WHICH IS IN EFFECT FROM MIDNIGHT TONIGHT TO 1 PM MDT MONDAY. A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 PM MDT THIS EVENING. ADDITIONAL SNOWFALL OF 1 TO 2 INCHES ARE EXPECTED THROUGH THE REMAINDER OF THE AFTERNOON. STORM TOTAL SNOW ACCUMULATIONS OF 5 TO 10 INCHES ARE EXPECTED. HIGHWAY 2 LEADING UP TO MARIAS PASS WILL BE AFFECTED BY THIS STORM SYSTEM. STRONG EAST TO NORTHEAST WINDS 15 TO 25 MPH WITH LOCAL GUSTS TO 35 MPH WILL CREATE AREAS OF BLOWING AND DRIFTING SNOW AND REDUCED VISIBILITIES. IN ADDITION...THE COMBINATION OF STRONG WIND AND COLD TEMPERATURES WILL RESULT IN WIND CHILL VALUES OF 10 BELOW TO 25 BELOW ZERO AFTER MIDNIGHT TONIGHT. DANGEROUS WIND CHILLS WILL PERSIST THROUGH MONDAY MORNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WIND CHILL ADVISORY MEANS THAT VERY COLD AIR AND STRONG WINDS WILL COMBINE TO GENERATE LOW WIND CHILLS. THIS WILL RESULT IN FROST BITE AND LEAD TO HYPOTHERMIA IF PRECAUTIONS ARE NOT TAKEN. && $$ IDZ005-006-090000- /O.CON.KMSO.WS.W.0009.000000T0000Z-090309T0000Z/ NORTHERN CLEARWATER MOUNTAINS-SOUTHERN CLEARWATER MOUNTAINS- 123 PM PDT SUN MAR 8 2009 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM PDT THIS AFTERNOON... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM PDT THIS AFTERNOON. STORM TOTAL SNOW ACCUMULATIONS OF 5 TO 10 INCHES ARE EXPECTED BY THIS EVENING. THIS INCLUDES THE HIGHWAY 11 CORRIDOR BETWEEN PIERCE AND HEADQUARTERS AS WELL AS THE HIGHWAY 12 CORRIDOR BETWEEN POWELL AND LOLO PASS. STRONG SNOW SHOWERS WILL HAVE THE POTENTIAL TO RAPIDLY REDUCE VISIBILITIES THROUGH THE REMAINDER OF THE AFTERNOON. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING MEANS SIGNIFICANT AMOUNTS OF SNOW... BLOWING SNOW ARE EXPECTED OR OCCURRING. STRONG WINDS AND DANGEROUS WIND CHILLS ARE ALSO POSSIBLE. THIS WILL MAKE TRAVEL VERY HAZARDOUS. && $$ MTZ043-090600- /O.NEW.KMSO.WC.Y.0003.090309T0600Z-090309T1900Z/ /O.CON.KMSO.WW.Y.0040.000000T0000Z-090309T0000Z/ POTOMAC/SEELEY LAKE REGION- 223 PM MDT SUN MAR 8 2009 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM MDT THIS EVENING... ...WIND CHILL ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 1 PM MDT MONDAY... THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A WIND CHILL ADVISORY...WHICH IS IN EFFECT FROM MIDNIGHT TONIGHT TO 1 PM MDT MONDAY. A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM MDT THIS EVENING. STORM TOTAL SNOW ACCUMULATIONS OF 2 TO 6 INCHES ARE EXPECTED BY SUNDAY EVENING. BRIEF HEAVY SNOW SHOWERS COULD BRING QUICK SNOW ACCUMULATIONS TO THE ROADWAYS AND RESULT IN REDUCED VISIBILITIES AND POOR DRIVING CONDITIONS AT TIMES THROUGH THE REMAINDER OF THE AFTERNOON. IN ADDITION TO SNOW...WINDS WILL BE INCREASING FROM THE NORTH AND EAST 15 TO 25 MPH AFTER MIDNIGHT TONIGHT AS ARCTIC AIR SURGES INTO WESTERN MONTANA. WIND CHILL VALUES OF 10 BELOW TO 15 BELOW ZERO ARE POSSIBLE...AS WELL SOME BLOWING AND DRIFTING OF SNOW. DANGEROUS WIND CHILLS WILL PERSIST THROUGH MONDAY MORNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WIND CHILL ADVISORY MEANS THAT VERY COLD AIR AND STRONG WINDS WILL COMBINE TO GENERATE LOW WIND CHILLS. THIS WILL RESULT IN FROST BITE AND LEAD TO HYPOTHERMIA IF PRECAUTIONS ARE NOT TAKEN. && $$ MTZ007-090600- /O.NEW.KMSO.WC.Y.0003.090309T0600Z-090309T1900Z/ BUTTE/BLACKFOOT REGION- 223 PM MDT SUN MAR 8 2009 ...WIND CHILL ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 1 PM MDT MONDAY... THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A WIND CHILL ADVISORY...WHICH IS IN EFFECT FROM MIDNIGHT TONIGHT TO 1 PM MDT MONDAY. WINDS WILL BE INCREASING FROM THE NORTHEAST 15 TO 25 MPH AFTER MIDNIGHT TONIGHT AS ARCTIC AIR SURGES INTO WESTERN MONTANA. WIND CHILL VALUES OF 10 BELOW TO 20 BELOW ZERO ARE EXPECTED. DANGEROUS WIND CHILLS WILL PERSIST THROUGH MONDAY MORNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WIND CHILL ADVISORY MEANS THAT VERY COLD AIR AND STRONG WINDS WILL COMBINE TO GENERATE LOW WIND CHILLS. THIS WILL RESULT IN FROST BITE AND LEAD TO HYPOTHERMIA IF PRECAUTIONS ARE NOT TAKEN. && $$ MTZ003-090000- /O.CON.KMSO.WW.Y.0040.000000T0000Z-090309T0000Z/ FLATHEAD/MISSION VALLEYS- 223 PM MDT SUN MAR 8 2009 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM MDT THIS EVENING... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM MDT THIS EVENING. STORM TOTAL SNOW ACCUMULATIONS OF 2 TO 5 INCHES ARE EXPECTED BY THIS EVENING IN THE FLATHEAD VALLEY...PRIMARILY NORTH OF FLATHEAD LAKE...INCLUDING KALISPELL. SNOW...IN COMBINATION WITH NORTH WINDS 15 TO 25 MPH WITH GUSTS UP TO 35 WILL RESULT IN AREAS OF REDUCED VISIBILITIES AND POOR DRIVING CONDITIONS AT TIMES THROUGH THE REMAINDER OF THE AFTERNOON. SOME BLOWING AND DRIFTING OF SNOW MAY CONTINUE OVERNIGHT IN THE NORTH FLATHEAD VALLEY AS COLD AIR CONTINUES TO FLOOD INTO THE VALLEY. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...BLOWING SNOW WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ MTZ001-004-090000- /O.CON.KMSO.WW.Y.0040.000000T0000Z-090309T0000Z/ KOOTENAI/CABINET REGION-LOWER CLARK FORK REGION- 223 PM MDT SUN MAR 8 2009 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM MDT THIS EVENING... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM MDT THIS EVENING. STORM TOTAL SNOW ACCUMULATIONS OF 2 TO 6 INCHES ARE EXPECTED BY THIS EVENING. LOOKOUT PASS WILL BE AFFECTED BY THIS STORM SYSTEM. BRIEF HEAVY SNOW SHOWERS COULD CAUSE REDUCED VISIBILITIES AND POOR DRIVING CONDITIONS AT TIMES THROUGH THE REMAINDER OF THE AFTERNOON. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...BLOWING SNOW WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ MTZ006-090000- /O.CON.KMSO.WW.Y.0040.000000T0000Z-090309T0000Z/ BITTERROOT/SAPPHIRE MOUNTAINS- 223 PM MDT SUN MAR 8 2009 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM MDT THIS EVENING... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM MDT THIS EVENING. STORM TOTAL SNOW ACCUMULATIONS OF 3 TO 7 INCHES ARE EXPECTED BY THIS EVENING. LOLO AND LOST TRAIL PASSES WILL BE AFFECTED BY THIS STORM SYSTEM. BRIEF HEAVY SNOW SHOWERS COULD CAUSE REDUCED VISIBILITIES AND POOR DRIVING CONDITIONS AT TIMES THROUGH THE REMAINDER OF THE AFTERNOON. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...BLOWING SNOW WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$
4 follow-up statements
000 WWUS45 KMSO 082353 WSWMSO URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE MISSOULA MT 553 PM MDT SUN MAR 8 2009 .SNOW SHOWERS WILL CONTINUE INTO THE EVENING HOURS AS A COLD UPPER LEVEL LOW PRESSURE SYSTEM HOLDS STEADY OVER THE NORTHERN ROCKIES REGION. SNOW SHOWERS WILL DECREASE AFTER SUNSET. SIGNIFICANT ACCUMULATIONS ARE NOT EXPECTED THUS THE WINTER WARNINGS AND ADVISORIES HAVE BEEN CANCELE. ARCTIC AIR HAS ALREADY BEGUN TO SURGE ACROSS THE CONTINENTAL DIVIDE THANKS TO INCREASING NORTHEAST WINDS. THE COMBINATION OF STRONG WINDS AND COLD TEMPERATURES WILL CREATE WIND CHILLS WELL BELOW ZERO LATER TONIGHT AND INTO MONDAY MORNING. MTZ002-091100- /O.CAN.KMSO.WS.W.0009.000000T0000Z-090309T0000Z/ /O.CON.KMSO.WC.Y.0003.090309T0600Z-090309T1900Z/ WEST GLACIER REGION- 553 PM MDT SUN MAR 8 2009 ...WIND CHILL ADVISORY REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO 1 PM MDT MONDAY... ...WINTER STORM WARNING IS CANCELLED... THE NATIONAL WEATHER SERVICE IN MISSOULA HAS CANCELLED THE WINTER STORM WARNING. A WIND CHILL ADVISORY REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO 1 PM MDT MONDAY. EXPECT SOME SCATTERED SNOW SHOWERS THIS EVENING WITH LITTLE ACCUMULATON EXPECTED. IN ADDITION...THE COMBINATION OF STRONG WIND AND COLD TEMPERATURES WILL RESULT IN WIND CHILL VALUES OF 10 BELOW TO 25 BELOW ZERO AFTER MIDNIGHT TONIGHT. DANGEROUS WIND CHILLS WILL PERSIST THROUGH MONDAY MORNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WIND CHILL ADVISORY MEANS THAT VERY COLD AIR AND STRONG WINDS WILL COMBINE TO GENERATE LOW WIND CHILLS. THIS WILL RESULT IN FROST BITE AND LEAD TO HYPOTHERMIA IF PRECAUTIONS ARE NOT TAKEN. && PRECAUTIONARY/PREPAREDNESS ACTIONS... A WIND CHILL ADVISORY MEANS THAT VERY COLD AIR AND STRONG WINDS WILL COMBINE TO GENERATE LOW WIND CHILLS. THIS WILL RESULT IN FROST BITE AND LEAD TO HYPOTHERMIA IF PRECAUTIONS ARE NOT TAKEN. IF YOU MUST VENTURE OUTDOORS...MAKE SURE YOU WEAR A HAT AND GLOVES. && $$ IDZ005-006-090100- /O.CAN.KMSO.WS.W.0009.000000T0000Z-090309T0000Z/ NORTHERN CLEARWATER MOUNTAINS-SOUTHERN CLEARWATER MOUNTAINS- 453 PM PDT SUN MAR 8 2009 ...WINTER STORM WARNING IS CANCELLED... THE NATIONAL WEATHER SERVICE IN MISSOULA HAS CANCELLED THE WINTER STORM WARNING. $$ MTZ043-091100- /O.CAN.KMSO.WW.Y.0040.000000T0000Z-090309T0000Z/ /O.CON.KMSO.WC.Y.0003.090309T0600Z-090309T1900Z/ POTOMAC/SEELEY LAKE REGION- 553 PM MDT SUN MAR 8 2009 ...WIND CHILL ADVISORY REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO 1 PM MDT MONDAY... ...WINTER WEATHER ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN MISSOULA HAS CANCELLED THE WINTER WEATHER ADVISORY. A WIND CHILL ADVISORY REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO 1 PM MDT MONDAY. EXPECT SOME SCATTERED SNOW LINGERING SHOWERS THIS EVENING WITH LITTLE ACCUMULATON EXPECTED. IN ADDITION TO SNOW...WINDS WILL BE INCREASING FROM THE NORTH AND EAST 15 TO 25 MPH AFTER MIDNIGHT TONIGHT AS ARCTIC AIR SURGES INTO WESTERN MONTANA. WIND CHILL VALUES OF 10 BELOW TO 15 BELOW ZERO ARE POSSIBLE...AS WELL SOME BLOWING AND DRIFTING OF SNOW. DANGEROUS WIND CHILLS WILL PERSIST THROUGH MONDAY MORNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WIND CHILL ADVISORY MEANS THAT VERY COLD AIR AND STRONG WINDS WILL COMBINE TO GENERATE LOW WIND CHILLS. THIS WILL RESULT IN FROST BITE AND LEAD TO HYPOTHERMIA IF PRECAUTIONS ARE NOT TAKEN. && PRECAUTIONARY/PREPAREDNESS ACTIONS... A WIND CHILL ADVISORY MEANS THAT VERY COLD AIR AND STRONG WINDS WILL COMBINE TO GENERATE LOW WIND CHILLS. THIS WILL RESULT IN FROST BITE AND LEAD TO HYPOTHERMIA IF PRECAUTIONS ARE NOT TAKEN. IF YOU MUST VENTURE OUTDOORS...MAKE SURE YOU WEAR A HAT AND GLOVES. && $$ MTZ001-003-004-006-090100- /O.CAN.KMSO.WW.Y.0040.000000T0000Z-090309T0000Z/ KOOTENAI/CABINET REGION-FLATHEAD/MISSION VALLEYS- LOWER CLARK FORK REGION-BITTERROOT/SAPPHIRE MOUNTAINS- 553 PM MDT SUN MAR 8 2009 ...WINTER WEATHER ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN MISSOULA HAS CANCELLED THE WINTER WEATHER ADVISORY. EXPECT SOME SCATTERED SNOW SHOWERS THIS EVENING WITH LITTLE ACCUMULATON EXPECTED. $$ MTZ007-091100- /O.CON.KMSO.WC.Y.0003.090309T0600Z-090309T1900Z/ BUTTE/BLACKFOOT REGION- 553 PM MDT SUN MAR 8 2009 ...WIND CHILL ADVISORY REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO 1 PM MDT MONDAY... A WIND CHILL ADVISORY REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO 1 PM MDT MONDAY. WINDS WILL BE INCREASING FROM THE NORTHEAST 15 TO 25 MPH AFTER MIDNIGHT TONIGHT AS ARCTIC AIR SURGES INTO WESTERN MONTANA. WIND CHILL VALUES OF 10 BELOW TO 20 BELOW ZERO ARE EXPECTED. DANGEROUS WIND CHILLS WILL PERSIST THROUGH MONDAY MORNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WIND CHILL ADVISORY MEANS THAT VERY COLD AIR AND STRONG WINDS WILL COMBINE TO GENERATE LOW WIND CHILLS. THIS WILL RESULT IN FROST BITE AND LEAD TO HYPOTHERMIA IF PRECAUTIONS ARE NOT TAKEN. && $$
000 WWUS45 KMSO 090000 CCA WSWMSO URGENT - WINTER WEATHER MESSAGE...CORRECTED NATIONAL WEATHER SERVICE MISSOULA MT 559 PM MDT SUN MAR 8 2009 .SNOW SHOWERS WILL CONTINUE INTO THE EVENING HOURS AS A COLD UPPER LEVEL LOW PRESSURE SYSTEM HOLDS STEADY OVER THE NORTHERN ROCKIES REGION. SNOW SHOWERS WILL DECREASE AFTER SUNSET. SIGNIFICANT ACCUMULATIONS ARE NOT EXPECTED THUS THE WINTER WARNINGS AND ADVISORIES HAVE BEEN CANCELE. ARCTIC AIR HAS ALREADY BEGUN TO SURGE ACROSS THE CONTINENTAL DIVIDE THANKS TO INCREASING NORTHEAST WINDS. THE COMBINATION OF STRONG WINDS AND COLD TEMPERATURES WILL CREATE WIND CHILLS WELL BELOW ZERO LATER TONIGHT AND INTO MONDAY MORNING. MTZ002-091115- /O.CAN.KMSO.WS.W.0009.000000T0000Z-090309T0000Z/ /O.COR.KMSO.WC.Y.0003.090309T0600Z-090309T1900Z/ WEST GLACIER REGION- 559 PM MDT SUN MAR 8 2009 ...WIND CHILL ADVISORY REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO 1 PM MDT MONDAY... ...WINTER STORM WARNING IS CANCELLED... THE NATIONAL WEATHER SERVICE IN MISSOULA HAS CANCELLED THE WINTER STORM WARNING. A WIND CHILL ADVISORY REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO 1 PM MDT MONDAY. EXPECT SOME SCATTERED SNOW SHOWERS THIS EVENING WITH LITTLE ACCUMULATON EXPECTED. IN ADDITION...THE COMBINATION OF STRONG WIND AND COLD TEMPERATURES WILL RESULT IN WIND CHILL VALUES OF 10 BELOW TO 25 BELOW ZERO AFTER MIDNIGHT TONIGHT. DANGEROUS WIND CHILLS WILL PERSIST THROUGH MONDAY MORNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WIND CHILL ADVISORY MEANS THAT VERY COLD AIR AND STRONG WINDS WILL COMBINE TO GENERATE LOW WIND CHILLS. THIS WILL RESULT IN FROST BITE AND LEAD TO HYPOTHERMIA IF PRECAUTIONS ARE NOT TAKEN. && $$ IDZ005-006-090100- /O.COR.KMSO.WS.W.0009.000000T0000Z-090309T0000Z/ NORTHERN CLEARWATER MOUNTAINS-SOUTHERN CLEARWATER MOUNTAINS- 459 PM PDT SUN MAR 8 2009 ...WINTER STORM WARNING IS CANCELLED... THE NATIONAL WEATHER SERVICE IN MISSOULA HAS CANCELLED THE WINTER STORM WARNING. SNOW SHOWERS HAVE DECREASED IN COVERAGE AND INTENSTITY. FURTHER SIGNIFICANT ACCUMULATIONS ARE EXPECTED. $$ MTZ043-091115- /O.CAN.KMSO.WW.Y.0040.000000T0000Z-090309T0000Z/ /O.COR.KMSO.WC.Y.0003.090309T0600Z-090309T1900Z/ POTOMAC/SEELEY LAKE REGION- 559 PM MDT SUN MAR 8 2009 ...WIND CHILL ADVISORY REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO 1 PM MDT MONDAY... ...WINTER WEATHER ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN MISSOULA HAS CANCELLED THE WINTER WEATHER ADVISORY. A WIND CHILL ADVISORY REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO 1 PM MDT MONDAY. EXPECT SOME SCATTERED SNOW LINGERING SHOWERS THIS EVENING WITH LITTLE ACCUMULATON EXPECTED. IN ADDITION TO SNOW...WINDS WILL BE INCREASING FROM THE NORTH AND EAST 15 TO 25 MPH AFTER MIDNIGHT TONIGHT AS ARCTIC AIR SURGES INTO WESTERN MONTANA. WIND CHILL VALUES OF 10 BELOW TO 15 BELOW ZERO ARE POSSIBLE...AS WELL SOME BLOWING AND DRIFTING OF SNOW. DANGEROUS WIND CHILLS WILL PERSIST THROUGH MONDAY MORNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WIND CHILL ADVISORY MEANS THAT VERY COLD AIR AND STRONG WINDS WILL COMBINE TO GENERATE LOW WIND CHILLS. THIS WILL RESULT IN FROST BITE AND LEAD TO HYPOTHERMIA IF PRECAUTIONS ARE NOT TAKEN. && $$ MTZ001-003-004-006-090100- /O.COR.KMSO.WW.Y.0040.000000T0000Z-090309T0000Z/ KOOTENAI/CABINET REGION-FLATHEAD/MISSION VALLEYS- LOWER CLARK FORK REGION-BITTERROOT/SAPPHIRE MOUNTAINS- 559 PM MDT SUN MAR 8 2009 ...WINTER WEATHER ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN MISSOULA HAS CANCELLED THE WINTER WEATHER ADVISORY. EXPECT SOME SCATTERED SNOW SHOWERS THIS EVENING WITH LITTLE ACCUMULATON EXPECTED. SNOW SHOWERS HAVE DECREASED IN COVERAGE AND INTENSTITY. FURTHER SIGNIFICANT ACCUMULATIONS ARE EXPECTED. $$ MTZ007-091115- /O.CON.KMSO.WC.Y.0003.090309T0600Z-090309T1900Z/ BUTTE/BLACKFOOT REGION- 559 PM MDT SUN MAR 8 2009 ...WIND CHILL ADVISORY REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO 1 PM MDT MONDAY... A WIND CHILL ADVISORY REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO 1 PM MDT MONDAY. WINDS WILL BE INCREASING FROM THE NORTHEAST 15 TO 25 MPH AFTER MIDNIGHT TONIGHT AS ARCTIC AIR SURGES INTO WESTERN MONTANA. WIND CHILL VALUES OF 10 BELOW TO 20 BELOW ZERO ARE EXPECTED. DANGEROUS WIND CHILLS WILL PERSIST THROUGH MONDAY MORNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WIND CHILL ADVISORY MEANS THAT VERY COLD AIR AND STRONG WINDS WILL COMBINE TO GENERATE LOW WIND CHILLS. THIS WILL RESULT IN FROST BITE AND LEAD TO HYPOTHERMIA IF PRECAUTIONS ARE NOT TAKEN. && $$
000 WWUS45 KMSO 091045 WSWMSO URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE MISSOULA MT 445 AM MDT MON MAR 9 2009 .COLD AND UNSTABLE UPPER LEVEL TROUGH WILL CONTINUE TO IMPACT NORTH CENTRAL IDAHO AND WESTERN MONTANA THROUGH TUESDAY AFTERNOON. A STRONG JET ASSOCIATED WITH THIS UPPER TROUGH WILL IMPACT LOCATIONS ALONG THE MONTANA AND IDAHO BORDER THIS EVENING THROUGH EARLY TUESDAY. LOOKOUT AND LOLO PASSES WILL BE IMPACTED. IN ADDITION ANOTHER SURGE OF ARCTIC AIR WILL BE PULLED INTO NORTHWEST MONTANA OVERNIGHT. THIS FRONT WILL ACT AS A FOCUSING MECHANISM FOR INCREASED SNOW PRODUCTION...MAINLY IMPACTING LOCATIONS ALONG AND SOUTH OF HIGHWAY 2 TO THE INTERSTATE 90 CORRIDOR. WITH THIS ADDITIONAL SURGE OF ARCTIC AIR...INCREASING EAST WINDS WILL PRODUCE DANGEROUS WIND CHILL READINGS COLDER THAN 20 BELOW ZERO ACROSS THE NORTHERN FLATHEAD VALLEY AND GLACIER NATIONAL PARK. MTZ002-091845- /O.NEW.KMSO.WC.W.0001.090310T0400Z-090310T1900Z/ /O.CON.KMSO.WC.Y.0003.000000T0000Z-090309T1900Z/ WEST GLACIER REGION- 445 AM MDT MON MAR 9 2009 ...WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL 1 PM MDT THIS AFTERNOON... ...WIND CHILL WARNING IN EFFECT FROM 10 PM THIS EVENING TO 1 PM MDT TUESDAY... THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A WIND CHILL WARNING...WHICH IS IN EFFECT FROM 10 PM THIS EVENING TO 1 PM MDT TUESDAY. A WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL 1 PM MDT THIS AFTERNOON. THE COMBINATION OF STRONG WIND AND COLD TEMPERATURES WILL RESULT IN WIND CHILL VALUES OF 10 BELOW TO 19 BELOW WITH SOME LOCAL READINGS NEAR 25 BELOW ALONG THE DIVIDE. THESE CONDITIONS WILL PERSIST THROUGH NOON TODAY. ANOTHER SURGE OF ARCTIC AIR WILL MOVE INTO THE REGION LATE TONIGHT THROUGH TUESDAY MORNING. ANOTHER ROUND OF DANGEROUS WIND CHILL READINGS OF 20 BELOW TO 30 BELOW ZERO CAN BE EXPECTED. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WIND CHILL ADVISORY MEANS THAT VERY COLD AIR AND STRONG WINDS WILL COMBINE TO GENERATE LOW WIND CHILLS. THIS WILL RESULT IN FROST BITE AND LEAD TO HYPOTHERMIA IF PRECAUTIONS ARE NOT TAKEN. A WIND CHILL WARNING MEANS THE COMBINATION OF VERY COLD AIR AND STRONG WINDS WILL CREATE DANGEROUSLY LOW WIND CHILL VALUES. THIS WILL RESULT IN FROST BITE AND LEAD TO HYPOTHERMIA OR DEATH IF PRECAUTIONS ARE NOT TAKEN. && $$ MTZ003-091845- /O.NEW.KMSO.WC.W.0001.090310T0400Z-090310T1900Z/ FLATHEAD/MISSION VALLEYS- 445 AM MDT MON MAR 9 2009 ...WIND CHILL WARNING IN EFFECT FROM 10 PM THIS EVENING TO 1 PM MDT TUESDAY... THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A WIND CHILL WARNING...WHICH IS IN EFFECT FROM 10 PM THIS EVENING TO 1 PM MDT TUESDAY. ANOTHER SURGE OF ARCTIC AIR WILL MOVE INTO THE REGION LATE TONIGHT THROUGH TUESDAY MORNING. DANGEROUS WIND CHILL READINGS OF 20 BELOW TO 30 BELOW ZERO CAN BE EXPECTED. LOCATIONS IMPACTED WILL BE FLATHEAD LAKE AND LOCATIONS NORTH. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WIND CHILL WARNING MEANS THE COMBINATION OF VERY COLD AIR AND STRONG WINDS WILL CREATE DANGEROUSLY LOW WIND CHILL VALUES. THIS WILL RESULT IN FROST BITE AND LEAD TO HYPOTHERMIA OR DEATH IF PRECAUTIONS ARE NOT TAKEN. && $$ IDZ005>007-MTZ001-004-091845- /O.NEW.KMSO.WW.Y.0041.090310T0300Z-090310T1500Z/ NORTHERN CLEARWATER MOUNTAINS-SOUTHERN CLEARWATER MOUNTAINS- OROFINO/GRANGEVILLE REGION-KOOTENAI/CABINET REGION- LOWER CLARK FORK REGION- 445 AM MDT MON MAR 9 2009 /345 AM PDT MON MAR 9 2009/ ...WINTER WEATHER ADVISORY IN EFFECT FROM 9 PM MDT /8 PM PDT/ THIS EVENING TO 9 AM MDT /8 AM PDT/ TUESDAY... THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A WINTER WEATHER ADVISORY FOR SNOW...WHICH IS IN EFFECT FROM 9 PM MDT /8 PM PDT/ THIS EVENING TO 9 AM MDT /8 AM PDT/ TUESDAY. SNOW ACCUMULATIONS OF 3 TO 5 INCHES WILL BE COMMON BY TUESDAY MORNING ACROSS NORTHWEST MONTANA AND NORTH CENTRAL IDAHO. LOOKOUT AND LOLO PASSES WILL SEE LOCALLY HIGHER AMOUNTS WITH WIND CHILL READINGS AROUND 10 BELOW ZERO. IN NORTHWEST MONTANA...THE MAIN IMPACT AREAS WILL BE FOR LOCATIONS ALONG AND SOUTH OF HIGHWAY 2 TO THE INTERSTATE 90 CORRIDOR. LOCATIONS NEAR THE IDAHO PANHANDLE BORDER WILL SEE THE HEAVIEST AMOUNTS WITH ACCUMULATIONS DECREASING AS ONE TRAVELS EAST. IN NORTH CENTRAL IDAHO...THE CENTRAL AND NORTHERN CLEARWATER MOUNTAINS AND OROFINO THROUGH COTTONWOOD WILL BE THE MAIN AREAS IMPACTED. THE HEAVIEST AMOUNTS ARE EXPECTED NEAR THE MONTANA IDAHO BORDER WITH NORTH FACING SLOPES RECEIVING HEAVIER ACCUMULATIONS DUE TO OROGRAPHIC ENHANCEMENT. 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. && $$ MTZ007-043-091845- /O.CON.KMSO.WC.Y.0003.000000T0000Z-090309T1900Z/ BUTTE/BLACKFOOT REGION-POTOMAC/SEELEY LAKE REGION- 445 AM MDT MON MAR 9 2009 ...WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL 1 PM MDT THIS AFTERNOON... A WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL 1 PM MDT THIS AFTERNOON. NORTHEAST WINDS TO 15 TO 25 MPH WILL CONTINUE ALONG THE CONTINENTAL DIVIDE AS ARCTIC AIR REMAINS OVER EASTERN MONTANA. WIND CHILL VALUES OF 10 BELOW TO 20 BELOW ZERO WITH LOCAL READINGS AROUND 25 BELOW ZERO ALONG THE DIVIDE WILL CONTINUE THROUGH EARLY AFTERNOON. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WIND CHILL ADVISORY MEANS THAT VERY COLD AIR AND STRONG WINDS WILL COMBINE TO GENERATE LOW WIND CHILLS. THIS WILL RESULT IN FROST BITE AND LEAD TO HYPOTHERMIA IF PRECAUTIONS ARE NOT TAKEN. && $$
000 WWUS45 KMSO 091845 WSWMSO URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE MISSOULA MT 1245 PM MDT MON MAR 9 2009 .COLD AND UNSTABLE UPPER LEVEL TROUGH WILL CONTINUE TO IMPACT NORTH CENTRAL IDAHO AND WESTERN MONTANA THROUGH TUESDAY AFTERNOON. A STRONG JET ASSOCIATED WITH THIS UPPER TROUGH WILL IMPACT LOCATIONS ALONG THE MONTANA AND IDAHO BORDER THIS EVENING THROUGH EARLY TUESDAY. LOOKOUT AND LOLO PASSES WILL BE IMPACTED. IN ADDITION ANOTHER SURGE OF ARCTIC AIR WILL BE PULLED INTO NORTHWEST MONTANA OVERNIGHT. THIS FRONT WILL ACT AS A FOCUSING MECHANISM FOR INCREASED SNOW PRODUCTION...MAINLY IMPACTING LOCATIONS ALONG AND SOUTH OF HIGHWAY 2 TO THE INTERSTATE 90 CORRIDOR. WITH THIS ADDITIONAL SURGE OF ARCTIC AIR...INCREASING EAST WINDS WILL PRODUCE DANGEROUS WIND CHILL READINGS COLDER THAN 20 BELOW ZERO ACROSS THE NORTHERN FLATHEAD VALLEY AND GLACIER NATIONAL PARK. MTZ002-100245- /O.EXP.KMSO.WC.Y.0003.000000T0000Z-090309T1900Z/ /O.CON.KMSO.WC.W.0001.090310T0400Z-090310T1900Z/ WEST GLACIER REGION- 1245 PM MDT MON MAR 9 2009 ...WIND CHILL WARNING REMAINS IN EFFECT FROM 10 PM THIS EVENING TO 1 PM MDT TUESDAY... ...WIND CHILL ADVISORY WILL EXPIRE AT 1 PM MDT THIS AFTERNOON... THE WIND CHILL ADVISORY WILL EXPIRE AT 1 PM MDT THIS AFTERNOON. A WIND CHILL WARNING REMAINS IN EFFECT FROM 10 PM THIS EVENING TO 1 PM MDT TUESDAY. THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A WIND CHILL WARNING...WHICH IS IN EFFECT FROM 10 PM THIS EVENING TO 1 PM MDT TUESDAY. A WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL 1 PM MDT THIS AFTERNOON. WIND CHILLS WILL REMAIN COLD THROUGH THE DAY...HOWEVER WINDS HAVE DECREASED ENOUGH TO ALLOW WIND CHILLS TO DIP BELOW ADVISORY CRITERIA. ANOTHER SURGE OF ARCTIC AIR WILL MOVE INTO THE REGION LATE TONIGHT THROUGH TUESDAY MORNING. ANOTHER ROUND OF DANGEROUS WIND CHILL READINGS OF 20 BELOW TO 30 BELOW ZERO CAN BE EXPECTED. && PRECAUTIONARY/PREPAREDNESS ACTIONS... A WIND CHILL WARNING MEANS THE COMBINATION OF VERY COLD AIR AND STRONG WINDS WILL CREATE DANGEROUSLY LOW WIND CHILL VALUES. THIS WILL RESULT IN FROST BITE AND LEAD TO HYPOTHERMIA IF PRECAUTIONS ARE NOT TAKEN. && $$ MTZ007-043-091945- /O.EXP.KMSO.WC.Y.0003.000000T0000Z-090309T1900Z/ BUTTE/BLACKFOOT REGION-POTOMAC/SEELEY LAKE REGION- 1245 PM MDT MON MAR 9 2009 ...WIND CHILL ADVISORY WILL EXPIRE AT 1 PM MDT THIS AFTERNOON... THE WIND CHILL ADVISORY WILL EXPIRE AT 1 PM MDT THIS AFTERNOON. WIND CHILLS WILL REMAIN COLD THROUGH THE DAY...HOWEVER WINDS HAVE DECREASED ENOUGH TO ALLOW WIND CHILLS TO DIP BELOW ADVISORY CRITERIA. $$ MTZ003-100245- /O.CON.KMSO.WC.W.0001.090310T0400Z-090310T1900Z/ FLATHEAD/MISSION VALLEYS- 1245 PM MDT MON MAR 9 2009 ...WIND CHILL WARNING REMAINS IN EFFECT FROM 10 PM THIS EVENING TO 1 PM MDT TUESDAY... A WIND CHILL WARNING REMAINS IN EFFECT FROM 10 PM THIS EVENING TO 1 PM MDT TUESDAY. ANOTHER SURGE OF ARCTIC AIR WILL MOVE INTO THE REGION LATE TONIGHT THROUGH TUESDAY MORNING. DANGEROUS WIND CHILL READINGS OF 20 BELOW TO 30 BELOW ZERO CAN BE EXPECTED. LOCATIONS IMPACTED WILL BE FLATHEAD LAKE AND LOCATIONS NORTH. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WIND CHILL WARNING MEANS THE COMBINATION OF VERY COLD AIR AND STRONG WINDS WILL CREATE DANGEROUSLY LOW WIND CHILL VALUES. THIS WILL RESULT IN FROST BITE AND LEAD TO HYPOTHERMIA IF PRECAUTIONS ARE NOT TAKEN. && $$ IDZ005>007-MTZ001-004-100245- /O.CON.KMSO.WW.Y.0041.090310T0300Z-090310T1500Z/ NORTHERN CLEARWATER MOUNTAINS-SOUTHERN CLEARWATER MOUNTAINS- OROFINO/GRANGEVILLE REGION-KOOTENAI/CABINET REGION- LOWER CLARK FORK REGION- 1245 PM MDT MON MAR 9 2009 /1145 AM PDT MON MAR 9 2009/ ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 9 PM MDT /8 PM PDT/ THIS EVENING TO 9 AM MDT /8 AM PDT/ TUESDAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 9 PM MDT /8 PM PDT/ THIS EVENING TO 9 AM MDT /8 AM PDT/ TUESDAY. SNOW ACCUMULATIONS OF 3 TO 5 INCHES WILL BE COMMON BY TUESDAY MORNING ACROSS NORTHWEST MONTANA AND NORTH CENTRAL IDAHO. LOOKOUT AND LOLO PASSES WILL SEE LOCALLY HIGHER AMOUNTS WITH WIND CHILL READINGS AROUND 10 BELOW ZERO. IN NORTHWEST MONTANA...THE MAIN IMPACT AREAS WILL BE FOR LOCATIONS ALONG AND SOUTH OF HIGHWAY 2 TO THE INTERSTATE 90 CORRIDOR. LOCATIONS NEAR THE IDAHO PANHANDLE BORDER WILL SEE THE HEAVIEST AMOUNTS WITH ACCUMULATIONS DECREASING AS ONE TRAVELS EAST. IN NORTH CENTRAL IDAHO...THE CENTRAL AND NORTHERN CLEARWATER MOUNTAINS AND OROFINO THROUGH COTTONWOOD WILL BE THE MAIN AREAS IMPACTED. THE HEAVIEST AMOUNTS ARE EXPECTED NEAR THE MONTANA IDAHO BORDER WITH NORTH FACING SLOPES RECEIVING HEAVIER ACCUMULATIONS DUE TO OROGRAPHIC ENHANCEMENT. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...BLOWING SNOW...OR FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$
What forecasters said that day
The local office's own words before this wind chill 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 wind chill advisory went out at Mar 8, 9:19 AM MDT, 5 hours 4 minutes earlier.
Area forecast discussion, Mar 8, 9:19 AM MDT, 5 hours 4 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MISSOULA MT
919 AM MDT SUN MAR 8 2009
.UPDATE...INCREASED NORTHEAST WINDS/POPS AND COOLED TEMPERATURES
THROUGH WEST GLACIER REGION INTO THE NORTHERN FLATHEAD VALLEY
TODAY.
&&
.DISCUSSION...ARCTIC AIR HAS ALREADY STARTED TO SURGE THROUGH THE
GAPS OF THE DIVIDE NEAR GLACIER NATIONAL PARK. NORTHEAST WINDS 15
TO 25 MPH WITH LOCAL GUSTS UP TO 40 MPH ARE POSSIBLE THROUGH THESE
GAPS OF THE DIVIDE AS WELL AS SPILLING INTO THE NORTHERN FLATHEAD
VALLEY. IN ADDITION WIND AND THIS ARCTIC INFLUX...ACCUMULATING
SNOWFALL WILL REDUCE VISIBILITIES WITH BLOWING AND DRIFTING
LIKELY.
ELSEWHERE...THE COLD FRONT ASSOCIATED WITH THE UPPER TROUGH SYSTEM
HAS PASSED INTO EASTERN MONTANA. THE AIR MASS WILL REMAIN MOIST
AND BECOME INCREASING MORE UNSTABLE AS THE DAY WEARS ON. SOME SNOW
SHOWERS MAY BE CAPABLE TO PRODUCE BRIEF HEAVY SNOW.
&&
.AVIATION...A COLD AND UNSTABLE UPPER LEVEL SYSTEM WILL PROVIDE
SHOWERY CONDITIONS OVER NORTH CENTRAL IDAHO AND WESTERN MONTANA.
THESE SHOWERS WILL MEAN HIGHER TERRAIN AND PASSES WILL BE OBSCURED
THROUGH THIS EVENING...WITH VISIBILITIES REDUCED IN HEAVIER
SHOWERS. ALL AIRFIELDS WILL BE IMPACTED BY THESE SHOWERS TODAY.
TONIGHT...AN ARCTIC AIRMASS WILL MOVE OVER THE DIVIDE AND INCREASE
WINDS ACROSS THE GLACIER NATIONAL PARK AND FLATHEAD VALLEY. AT
THIS TIME...LOOKS LIKE THE HIGHEST WINDS WILL IMPACT KGPI BETWEEN
16Z AND 06Z WITH GUSTS NEAR 40 MPH POSSIBLE. SNOW ALONG THE FRONT
IS ALSO POSSIBLE REDUCING VISIBILITIES TO NEAR ZERO FROM BLOWING
AND DRIFTING SNOW.
&&
.PREV DISCUSSION... /ISSUED 406 AM MDT SUN MAR 8 2009/
DISCUSSION...A MOIST AND UNSTABLE LOW PRESSURE TROUGH WILL
MAINTAIN ITS PRESENCE OVER THE NORTHERN ROCKIES THROUGH THE
BEGINNING OF THE WEEK. FOR TODAY...COOLING ALOFT WILL CONTINUE TO
CREATE VERY UNSTABLE CONDITIONS THROUGH NORTH CENTRAL IDAHO AND
WESTERN MONTANA. THERE ALSO APPEARS TO BE A WEAK AREA OF
CIRCULATION OVER EASTERN WASHINGTON THAT IS CONTRIBUTING TO
ENHANCED SNOW SHOWERS. THESE SNOW SHOWERS ARE EXPECTED TO LAST
THROUGH THIS EVENING WITH BRIEF HEAVY SNOW SHOWERS BRINGING THE
POTENTIAL FOR QUICK BURSTS OF ONE TO TWO INCHES OF SNOW AND
REDUCED VISIBILITIES. THESE SHOWERS WILL WEAKEN TONIGHT. CURRENT
WINTRY HIGHLIGHTS ARE ON TRACK WITH NO CHANGES MADE. SEE HEADLINE
SECTION BELOW FOR DETAILS.
COLD ARCTIC AIR WILL BEGIN TO STREAM OVER THE CONTINENTAL DIVIDE
AND INTO NORTHWEST MONTANA TONIGHT. EAST AND NORTHEAST WINDS WILL
INCREASE AS THE COLD AIR MOVES IN. THIS COMBINATION OF COLD AIR
AND STRONG WINDS WILL CREATE SUB- ZERO WIND CHILLS LATE TONIGHT
INTO MONDAY MORNING THROUGH THOSE TRAVEL CORRIDORS AND WESTERN
MONTANA VALLEYS THAT ARE TYPICALLY IMPACTED BY ARCTIC AIR
INTRUSIONS. AS A WEST TO SOUTHWEST FLOW ALOFT CONTINUES TO FEED
MOIST UNSTABLE AIR INTO THE NORTHERN FLATHEAD VALLEY AND WEST
GLACIER REGION...AN AREA OF ENHANCED SNOW IS QUITE POSSIBLE LATE
TONIGHT AND EARLY MONDAY.
THE UPPER TROUGH AND ARCTIC AIRMASS WILL CONTINUE TO INFLUENCE THE
INTER-MOUNTAIN REGION THROUGH TUESDAY EVENING. THE POTENTIAL FOR
SOME BANDING ALSO LOOKS POSSIBLE FROM LOOKOUT PASS TO THE SEELEY
LAKE REGION...INCLUDING THE INTERSTATE 90 CORRIDOR. THIS COULD
PRODUCE SOME LOCAL BANDS OF MODERATE SNOW ACCUMULATIONS. WE WILL
CONTINUE TO MONITOR THIS SCENARIO FOR TIMING AND JET STRENGTH PLAY
IMPORTANT ROLES FOR THIS TO COME TO FRUITION.
TUESDAY NIGHT THROUGH EARLY THURSDAY WILL BE DOMINATED BY
UPPER LEVEL NORTHWEST FLOW. A SURFACE RIDGE WILL BUILD OVER THE
AREA...SO GIVEN AMOUNT OF CLEARING AND FRESH SNOW COVER...SOME
VERY COLD POTENTIALLY RECORD BREAKING LOWS ARE POSSIBLE WEDNESDAY
AND THURSDAY MORNING. NORTHWEST FLOWS HAVE A TENDENCY TO KEEP
ENOUGH MOISTURE OVER THE REGION...THEREFORE THE MINIMUM
TEMPERATURES WILL HAVE TO BE EVALUATED DAY TO DAY AS AMOUNT OF
MOISTURE IN THE FLOW WILL BE A BIG FACTOR.
FRIDAY THROUGH SUNDAY THE MODELS AGREE ON A RIDGE OR DRY ZONAL
FLOW FOR FRIDAY...THEN DIVERGE CONSIDERABLY. THE ECMWF KEEPS THE
RIDGE HOLDING STRONG OVER THE INTER-MOUNTAIN REGION...WHILE THE GFS
HAS ANOTHER PACIFIC TROUGH MOVING INTO THE AREA. AT THIS TIME THE
MODEL LEANS MORE TOWARD THE GFS AND CLIMATOLOGICAL CHANCES OF
PRECIPITATION. AS LONG AS CONVECTION REMAINS ACTIVE OVER THE
DATELINE...A TROUGH SCENARIO LATTER PART OF THE EXTENDED SEEMS
MORE REALISTIC. WILL CONTINUE TO MONITOR LATER RUNS AND ADJUST
PRECIPITATION CHANCES ACCORDINGLY.
&&
.MSO WATCHES/WARNINGS/ADVISORIES...
MT...WINTER WEATHER ADVISORY UNTIL 6 PM MDT THIS EVENING FOR
KOOTENAI/CABINET REGION-LOWER CLARK FORK REGION.
WINTER WEATHER ADVISORY UNTIL 6 PM MDT THIS EVENING FOR
FLATHEAD/MISSION VALLEYS.
WINTER STORM WARNING UNTIL 6 PM MDT THIS EVENING FOR WEST
GLACIER REGION.
WINTER WEATHER ADVISORY UNTIL 6 PM MDT THIS EVENING FOR
BITTERROOT/SAPPHIRE MOUNTAINS.
WINTER WEATHER ADVISORY UNTIL 6 PM MDT THIS EVENING FOR
POTOMAC/SEELEY LAKE REGION.
ID...WINTER WEATHER ADVISORY UNTIL 5 PM PDT THIS AFTERNOON FOR
OROFINO/GRANGEVILLE REGION.
WINTER STORM WARNING UNTIL 5 PM PDT THIS AFTERNOON FOR NORTHERN
CLEARWATER MOUNTAINS-SOUTHERN CLEARWATER MOUNTAINS.
&&
SHORT TERM...MSJ
LONG TERM....MEAD
AVIATION...KOLATAHazardous weather outlook, Mar 8, 9:38 AM MDT, 4 hours 45 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE MISSOULA MT 938 AM MDT SUN MAR 8 2009 MTZ007-090600- BUTTE/BLACKFOOT REGION- 938 AM MDT SUN MAR 8 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF WEST CENTRAL MONTANA. .DAY ONE...TODAY AND TONIGHT SCATTERED SNOW SHOWERS ARE POSSIBLE THROUGH THE EVENING WITH ONLY LIGHT ACCUMULATIONS EXPECTED. ARCTIC AIR ENTERING THE AREA WILL DROP TEMPERATURES LATE TONIGHT. THE COMBINATION OF WIND AND COLD WILL RESULT IN WIND CHILL READINGS 10 BELOW TO 20 BELOW ZERO TONIGHT PRIMARILY NORTH OF HIGHWAY 12. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY VERY LOW WIND CHILLS WILL CONTINUE THROUGH EARLY MONDAY MORNING. SNOW IS EXPECTED TO INCREASE OVER MUCH OF THE AREA MONDAY AFTERNOON THROUGH MONDAY NIGHT ALONG WITH WIND CHILLS 10 BELOW TO ZERO OVERNIGHT MONDAY. DRIER CONDITIONS WILL DEVELOP BY MID WEEK WITH A SLOW WARMING TREND. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. MTZ002-090600- WEST GLACIER REGION- 938 AM MDT SUN MAR 8 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHWEST MONTANA. FOR THE LATEST INFORMATION ON WATCHES...WARNINGS AND ADVISORIES...GO TO WEATHER.GOV/MISSOULA. .DAY ONE...TODAY AND TONIGHT SNOW SHOWERS AND GUSTY WINDS WILL CONTINUE TONIGHT AND MAY IMPACT TRAVEL. BITTERLY COLD WIND CHILLS OF 15 BELOW TO 25 BELOW ZERO CAN BE EXPECTED OVERNIGHT AS COLD ARCTIC AIR PUSHES INTO NORTHWEST MONTANA. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY BITTERLY COLD OVERNIGHT TEMPERATURES CAN BE EXPECTED MONDAY THROUGH TUESDAY WITH SOME AREAS SEEING WIND CHILLS 20 BELOW TO 30 BELOW ZERO. SNOW SHOWERS WILL LAST THROUGH MONDAY EVENING AND BEGIN TO TAPER OFF OVERNIGHT. DRIER CONDITIONS WILL DEVELOP BY MID WEEK WITH A SLOW WARMING TREND. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. MTZ043-090600- POTOMAC/SEELEY LAKE REGION- 938 AM MDT SUN MAR 8 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF WEST CENTRAL MONTANA. FOR THE LATEST INFORMATION ON WATCHES...WARNINGS AND ADVISORIES...GO TO WEATHER.GOV/MISSOULA. .DAY ONE...TODAY AND TONIGHT SNOW SHOWERS WILL CONTINUE WITH TEMPERATURES DROPPING THIS EVENING AS COLD ARCTIC AIR PUSHES INTO THE AREA. DANGEROUS WIND CHILL READINGS OF 5 BELOW TO 15 BELOW ZERO ARE EXPECTED OVERNIGHT. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY BITTERLY COLD WIND CHILL TEMPERATURES OF 10 BELOW TO ZERO WILL EXTEND INTO MONDAY MORNING. COLD AND GUSTY NORTH TO NORTHEAST WINDS WILL THEN CONTINUE THROUGH MONDAY NIGHT...ALONG WITH AREAS OF SNOW. DRIER CONDITIONS WILL DEVELOP BY MID WEEK WITH A SLOW WARMING TREND. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.
Nearby
Wind Chill Advisories in Montana, 2009Every wind chill advisory 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.