Alert archive / Idaho / Winter Storm Watches in 2012
Winter Storm Watch 4, NWS Spokane, WA
NWS Spokane, WA issued this winter storm watch at Feb 16, 2012, 2:22 AM PST for 6 counties in Idaho; 5 counties in Washington. It took effect at Feb 17, 2012, 10:00 PM PST. It was in force for .
The area
The counties it named.
The facts
- Issued
- Feb 16, 2012, 2:22 AM PST (10:22 UTC)
- In effect from
- Feb 17, 2012, 10:00 PM PST
- Expired
- Feb 17, 2012, 11:51 AM PST
- In force
- Issued by
- NWS Spokane, WA
Counties Benewah County, ID, Bonner County, ID, Boundary County, ID, Kootenai County, ID, Latah County, ID, Shoshone County, ID, Ferry County, WA, Okanogan County, WA, Pend Oreille County, WA, Spokane County, WA, Stevens County, WA
The radar
The Spokane radar (KOTX), 43 km from the middle of the area, began a volume at 10:27 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, 10.4 hours before the alert went out and 71 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
- 1297 m above ground
- 0-6 km bulk shear
- 69 kt
- 0-1 km storm-relative helicity
- 84 m²/s²
- 0-3 km storm-relative helicity
- 131 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
736 WWUS46 KOTX 161022 WSWOTX URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE SPOKANE WA 222 AM PST THU FEB 16 2012 ...FAST MOVING WINTER STORM TO AFFECT THE AREA... .A STRONG...BUT QUICK MOVING WINTER STORM WILL BLOW THROUGH THE INLAND NORTHWEST FRIDAY NIGHT INTO SATURDAY. WARMER AND MUCH MORE MOIST AIR WILL SURGE NORTH AHEAD OF THE SYSTEM...RUNNING INTO COLDER AIR IN PLACE OVER THE THE NORTHERN VALLEYS OF NORTHEASTERN WASHINGTON AND THE NORTHERN IDAHO PANHANDLE. SNOW WILL DEVELOP FRIDAY NIGHT AND CONTINUE INTO SATURDAY...WITH LOCALLY HEAVY ACCUMULATIONS OVER A RELATIVELY SHORT PERIOD POSSIBLE. IDZ001-WAZ037-038-162300- /O.NEW.KOTX.WS.A.0004.120218T0600Z-120219T0000Z/ NORTHERN PANHANDLE-NORTHEAST MOUNTAINS-OKANOGAN HIGHLANDS- INCLUDING THE FOLLOWING LOCATIONS...SANDPOINT...ATHOL... BONNERS FERRY...PRIEST RIVER...EASTPORT... SCHWEITZER MOUNTAIN ROAD...COLVILLE...DEER PARK...CHEWELAH... NEWPORT...KETTLE FALLS...SPRINGDALE-HUNTERS ROAD... ORIN-RICE ROAD...FLOWERY TRAIL ROAD...REPUBLIC...INCHELIUM... WAUCONDA...CHESAW ROAD...HIGHWAY 20 WAUCONDA SUMMIT... BOULDER CREEK ROAD...SHERMAN PASS 222 AM PST THU FEB 16 2012 ...WINTER STORM WATCH IN EFFECT FROM FRIDAY EVENING THROUGH SATURDAY AFTERNOON... THE NATIONAL WEATHER SERVICE IN SPOKANE HAS ISSUED A WINTER STORM WATCH...WHICH IS IN EFFECT FROM FRIDAY EVENING THROUGH SATURDAY AFTERNOON. * SNOW ACCUMULATIONS: 4 TO 6 INCHES OF SNOW IN THE VALLEYS IN THE OKANOGAN HIGHLANDS...NORTHERN HALF OF STEVENS AND PEND OREILLE COUNTIES...AS WELL AS IN BONNER AND BOUNDARY COUNTY MOSTLY WEST OF HIGHWAY 95. ELSEWHERE IN THE VALLEYS GENERALLY 1 TO 3 INCHES. IN THE MOUNTAINS...6 TO 8 INCHES. * WINDS: SOUTH 5 TO 15 MPH WITH GUSTS UP TO 30 MPH. * TEMPERATURES: AROUND 30. * TIMING: SNOW WILL SPREAD FROM THE OKANOGAN HIGHLANDS LATE FRIDAY AFTERNOON TOWARD THE NORTHERN IDAHO PANHANDLE OVERNIGHT FRIDAY NIGHT AND CONTINUE INTO SATURDAY. A PERIOD OF HEAVY SNOW IS EXPECTED OVERNIGHT FRIDAY NIGHT. * LOCATIONS: REPUBLIC...INCHELIUM...WAUCONDA...CHESAW ROAD... HIGHWAY 20 WAUCONDA SUMMIT...BOULDER CREEK ROAD...SHERMAN PASS...PRIEST RIVER...EASTPORT...SCHWEITZER MOUNTAIN ROAD...COLVILLE...CHEWELAH...NEWPORT...KETTLE FALLS ...SPRINGDALE-HUNTERS ROAD...ORIN-RICE ROAD...FLOWERY TRAIL ROAD. * SNOW LEVEL: VALLEY FLOORS TOWARD THE CANADIAN BORDER...TRENDING TOWARD 2500 FEET SOUTH OF SANDPOINT AND AROUND DEER PARK AND KELLER. * IMPACTS: HEAVY SNOWFALL WILL MAKE TRAVEL DANGEROUS ACROSS THE VALLEYS AND MOUNTAINS OF NORTHERN WASHINGTON AND THE NORTH IDAHO PANHANDLE. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WATCH MEANS THERE IS A POTENTIAL FOR SIGNIFICANT SNOW ACCUMULATIONS THAT MAY IMPACT TRAVEL. CONTINUE TO MONITOR THE LATEST FORECASTS. && $$
4 follow-up statements
862 WWUS46 KOTX 161035 WSWOTX URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE SPOKANE WA 235 AM PST THU FEB 16 2012 ...FAST MOVING WINTER STORM TO AFFECT THE AREA... .A STRONG...BUT QUICK MOVING WINTER STORM WILL BLOW THROUGH THE INLAND NORTHWEST FRIDAY NIGHT INTO SATURDAY. WARMER AND MUCH MORE MOIST AIR WILL SURGE NORTH AHEAD OF THE SYSTEM...RUNNING INTO COLDER AIR IN PLACE OVER THE NORTHERN VALLEYS OF NORTHEASTERN WASHINGTON AND THE NORTHERN IDAHO PANHANDLE. SNOW WILL DEVELOP FRIDAY NIGHT AND CONTINUE INTO SATURDAY...WITH LOCALLY HEAVY ACCUMULATIONS OVER A RELATIVELY SHORT PERIOD POSSIBLE. IDZ001-WAZ037-038-162300- /O.CON.KOTX.WS.A.0004.120218T0600Z-120219T0000Z/ NORTHERN PANHANDLE-NORTHEAST MOUNTAINS-OKANOGAN HIGHLANDS- INCLUDING THE FOLLOWING LOCATIONS...BONNERS FERRY...EASTPORT... SCHWEITZER MOUNTAIN ROAD...COLVILLE...CHEWELAH...KETTLE FALLS... SPRINGDALE-HUNTERS ROAD...ORIN-RICE ROAD...FLOWERY TRAIL ROAD... REPUBLIC...INCHELIUM...WAUCONDA...CHESAW ROAD... HIGHWAY 20 WAUCONDA SUMMIT...BOULDER CREEK ROAD...SHERMAN PASS 235 AM PST THU FEB 16 2012 ...WINTER STORM WATCH REMAINS IN EFFECT FROM FRIDAY EVENING THROUGH SATURDAY AFTERNOON... * SNOW ACCUMULATIONS: 4 TO 6 INCHES OF SNOW IN THE VALLEYS IN THE OKANOGAN HIGHLANDS...NORTHERN HALF OF STEVENS AND PEND OREILLE COUNTIES...AS WELL AS IN BONNER AND BOUNDARY COUNTY MOSTLY WEST OF HIGHWAY 95. ELSEWHERE IN THE VALLEYS GENERALLY 1 TO 3 INCHES. IN THE MOUNTAINS...6 TO 8 INCHES. * WINDS: SOUTH 5 TO 15 MPH WITH GUSTS UP TO 30 MPH. * TEMPERATURES: AROUND 30. * TIMING: SNOW WILL SPREAD FROM THE OKANOGAN HIGHLANDS LATE FRIDAY AFTERNOON TOWARD THE NORTHERN IDAHO PANHANDLE OVERNIGHT FRIDAY NIGHT AND CONTINUE INTO SATURDAY. A PERIOD OF HEAVY SNOW IS EXPECTED OVERNIGHT FRIDAY NIGHT. * LOCATIONS: REPUBLIC...INCHELIUM...WAUCONDA...CHESAW ROAD... HIGHWAY 20 WAUCONDA SUMMIT...BOULDER CREEK ROAD...SHERMAN PASS...PRIEST RIVER...EASTPORT...SCHWEITZER MOUNTAIN ROAD... COLVILLE...CHEWELAH...NEWPORT...KETTLE FALLS SPRINGDALE-... HUNTERS ROAD...ORIN-RICE ROAD...FLOWERY TRAIL ROAD. * SNOW LEVEL: VALLEY FLOORS TOWARD THE CANADIAN BORDER... TRENDING TOWARD 2500 FEET SOUTH OF SANDPOINT AND AROUND DEER PARK AND KELLER. * IMPACTS: HEAVY SNOWFALL WILL MAKE TRAVEL DANGEROUS ACROSS THE VALLEYS AND MOUNTAINS OF NORTHERN WASHINGTON AND THE NORTH IDAHO PANHANDLE. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WATCH MEANS THERE IS A POTENTIAL FOR SIGNIFICANT SNOW ACCUMULATIONS THAT MAY IMPACT TRAVEL. CONTINUE TO MONITOR THE LATEST FORECASTS. && $$
402 WWUS46 KOTX 162124 WSWOTX URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE SPOKANE WA 124 PM PST THU FEB 16 2012 ...FAST MOVING WINTER STORM TO AFFECT THE AREA... .A STRONG...BUT QUICK MOVING WINTER STORM WILL BLOW THROUGH THE INLAND NORTHWEST FRIDAY NIGHT INTO SATURDAY. WARMER AND MUCH MORE MOIST AIR WILL SURGE NORTH AHEAD OF THE SYSTEM...RUNNING INTO COLDER AIR IN PLACE OVER THE NORTHERN VALLEYS OF NORTHEASTERN WASHINGTON AND THE NORTHERN IDAHO PANHANDLE. SNOW WILL DEVELOP FRIDAY NIGHT AND CONTINUE INTO SATURDAY...WITH LOCALLY HEAVY ACCUMULATIONS OVER A RELATIVELY SHORT PERIOD POSSIBLE. IDZ001-WAZ037-038-171230- /O.CON.KOTX.WS.A.0004.120218T0600Z-120219T0000Z/ NORTHERN PANHANDLE-NORTHEAST MOUNTAINS-OKANOGAN HIGHLANDS- INCLUDING THE FOLLOWING LOCATIONS...BONNERS FERRY...EASTPORT... SCHWEITZER MOUNTAIN ROAD...COLVILLE...CHEWELAH...KETTLE FALLS... SPRINGDALE-HUNTERS ROAD...ORIN-RICE ROAD...FLOWERY TRAIL ROAD... REPUBLIC...INCHELIUM...WAUCONDA...CHESAW ROAD... HIGHWAY 20 WAUCONDA SUMMIT...BOULDER CREEK ROAD...SHERMAN PASS 124 PM PST THU FEB 16 2012 ...WINTER STORM WATCH REMAINS IN EFFECT FROM FRIDAY EVENING THROUGH SATURDAY AFTERNOON... * SNOW ACCUMULATIONS: 4 TO 6 INCHES OF SNOW IN THE VALLEYS IN THE OKANOGAN HIGHLANDS...NORTHERN HALF OF STEVENS AND PEND OREILLE COUNTIES...AS WELL AS IN BONNER AND BOUNDARY COUNTY MOSTLY WEST OF HIGHWAY 95. ELSEWHERE IN THE VALLEYS GENERALLY 1 TO 3 INCHES. IN THE MOUNTAINS...5 TO 8 INCHES. * WINDS: SOUTH 5 TO 15 MPH WITH GUSTS UP TO 30 MPH...ESPECIALLY ALONG EXPOSED RIDGETOPS. * TEMPERATURES: AROUND 30. * TIMING: SNOW WILL SPREAD FROM THE OKANOGAN HIGHLANDS LATE FRIDAY AFTERNOON TOWARD THE NORTHERN IDAHO PANHANDLE OVERNIGHT FRIDAY NIGHT AND CONTINUE INTO SATURDAY. A PERIOD OF HEAVY SNOW IS EXPECTED OVERNIGHT FRIDAY NIGHT. NUMEROUS SNOW SHOWERS ARE EXPECTED THROUGH THE DAY SATURDAY. * LOCATIONS: REPUBLIC...INCHELIUM...WAUCONDA...CHESAW ROAD... HIGHWAY 20 WAUCONDA SUMMIT...BOULDER CREEK ROAD...SHERMAN PASS...PRIEST RIVER...EASTPORT...SCHWEITZER MOUNTAIN ROAD... COLVILLE...CHEWELAH...NEWPORT...KETTLE FALLS SPRINGDALE- ... HUNTERS ROAD...ORIN-RICE ROAD...FLOWERY TRAIL ROAD. * SNOW LEVEL: VALLEY FLOORS TOWARD THE CANADIAN BORDER... TRENDING TOWARD 2500 FEET SOUTH OF SANDPOINT AND AROUND DEER PARK AND KELLER. * IMPACTS: HEAVY SNOWFALL WILL MAKE TRAVEL DANGEROUS ACROSS THE VALLEYS AND MOUNTAINS OF NORTHERN WASHINGTON AND THE NORTH IDAHO PANHANDLE. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WATCH MEANS THERE IS A POTENTIAL FOR SIGNIFICANT SNOW ACCUMULATIONS THAT MAY IMPACT TRAVEL. CONTINUE TO MONITOR THE LATEST FORECASTS. && $$
240 WWUS46 KOTX 171205 WSWOTX URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE SPOKANE WA 405 AM PST FRI FEB 17 2012 .A STRONG...BUT QUICK MOVING WINTER STORM WILL BLOW THROUGH THE INLAND NORTHWEST TONIGHT INTO SATURDAY. WARMER AND MUCH MORE MOIST AIR WILL SURGE NORTH AHEAD OF THE SYSTEM...RUNNING INTO COLDER AIR IN PLACE OVER THE NORTHERN VALLEYS OF NORTHEASTERN WASHINGTON AND THE NORTHERN IDAHO PANHANDLE. SNOW WILL DEVELOP TONIGHT AND CONTINUE INTO SATURDAY...WITH LOCALLY HEAVY ACCUMULATIONS OVER A RELATIVELY SHORT PERIOD POSSIBLE. WAZ037-172015- /O.UPG.KOTX.WS.A.0004.120218T0600Z-120219T0000Z/ /O.NEW.KOTX.WS.W.0005.120218T0600Z-120219T0000Z/ NORTHEAST MOUNTAINS- INCLUDING THE FOLLOWING LOCATIONS...DEER PARK...NEWPORT... SPRINGDALE-HUNTERS ROAD...ORIN-RICE ROAD...FLOWERY TRAIL ROAD 405 AM PST FRI FEB 17 2012 ...WINTER STORM WARNING IN EFFECT FROM 10 PM THIS EVENING TO 4 PM PST SATURDAY... THE NATIONAL WEATHER SERVICE IN SPOKANE HAS ISSUED A WINTER STORM WARNING FOR HEAVY SNOW...WHICH IS IN EFFECT FROM 10 PM THIS EVENING TO 4 PM PST SATURDAY. THE WINTER STORM WATCH IS NO LONGER IN EFFECT. * SNOW ACCUMULATIONS: 4 TO 6 INCHES OF SNOW IN THE VALLEYS ACROSS THE NORTHERN HALF OF STEVENS AND PEND OREILLE COUNTIES. ELSEWHERE IN THE VALLEYS EXPECT GENERALLY 1 TO 3 INCHES. IN THE MOUNTAINS...5 TO 8 INCHES. * WINDS: SOUTH 5 TO 15 MPH WITH GUSTS UP TO 30 MPH...ESPECIALLY ALONG EXPOSED RIDGETOPS. * TEMPERATURES: AROUND 30. * TIMING: SNOW WILL SPREAD ACROSS THE REGION BEGINNING THIS EVENING AND CONTINUE INTO SATURDAY. A PERIOD OF HEAVY SNOW IS EXPECTED OVERNIGHT TONIGHT. NUMEROUS SNOW SHOWERS ARE EXPECTED THROUGH THE DAY SATURDAY. * LOCATIONS: COLVILLE...CHEWELAH...NEWPORT...KETTLE FALLS SPRINGDALE... HUNTERS ROAD...ORIN-RICE ROAD...FLOWERY TRAIL ROAD. * SNOW LEVEL: VALLEY FLOORS TOWARD THE CANADIAN BORDER... TRENDING TOWARD 2500 FEET ACROSS THE SOUTHERN PART OF PEND OREILLE AND STEVENS COUNTY...INCLUDING DEER PARK AND KELLER. * IMPACTS: HEAVY SNOWFALL WILL MAKE TRAVEL DANGEROUS ACROSS THE VALLEYS AND MOUNTAINS OF NORTHEAST WASHINGTON. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING MEANS SIGNIFICANT AMOUNTS OF SNOW ARE EXPECTED OR OCCURRING. STRONG WINDS ARE ALSO POSSIBLE. THIS WILL MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE. && $$ WAZ038-172015- /O.UPG.KOTX.WS.A.0004.120218T0600Z-120219T0000Z/ /O.NEW.KOTX.WW.Y.0009.120218T0000Z-120218T1200Z/ OKANOGAN HIGHLANDS- INCLUDING THE FOLLOWING LOCATIONS...REPUBLIC...INCHELIUM... WAUCONDA...CHESAW ROAD...HIGHWAY 20 WAUCONDA SUMMIT... BOULDER CREEK ROAD...SHERMAN PASS 405 AM PST FRI FEB 17 2012 ...WINTER WEATHER ADVISORY IN EFFECT FROM 4 PM THIS AFTERNOON TO 4 AM PST SATURDAY... THE NATIONAL WEATHER SERVICE IN SPOKANE HAS ISSUED A WINTER WEATHER ADVISORY FOR HEAVY SNOW...WHICH IS IN EFFECT FROM 4 PM THIS AFTERNOON TO 4 AM PST SATURDAY. THE WINTER STORM WATCH IS NO LONGER IN EFFECT. * SNOW ACCUMULATIONS: 2 TO 4 INCHES VALLEYS BELOW 3000 FEET...WITH 4 TO 7 INCHES IN THE MOUNTAINS. * WINDS: SOUTHEAST 10 TO 15 MPH WITH GUSTS UP TO 30 MPH. * TEMPERATURES: AROUND 30. * TIMING: A PERIOD OF HEAVY SNOW WILL SPREAD ACROSS THE OKANOGAN HIGHLANDS LATE TODAY AND CONTINUE INTO SATURDAY MORNING. SCATTERED SNOW SHOWERS ARE EXPECTED THROUGH THE DAY SATURDAY HOWEVER. * LOCATIONS: REPUBLIC...INCHELIUM...WAUCONDA...CHESAW ROAD... HIGHWAY 20 WAUCONDA SUMMIT...BOULDER CREEK ROAD...SHERMAN PASS. * IMPACTS: HEAVY SNOWFALL WILL MAKE TRAVEL DANGEROUS ACROSS THE VALLEYS AND MOUNTAINS OF NORTHERN WASHINGTON. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET...OR FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ WAZ041-043-044-172015- /O.NEW.KOTX.WW.Y.0009.120218T0000Z-120218T1200Z/ WENATCHEE AREA-OKANOGAN VALLEY-WATERVILLE PLATEAU- INCLUDING THE FOLLOWING LOCATIONS...WENATCHEE...CHELAN...ENTIAT... CASHMERE...OMAK...OKANOGAN...BREWSTER...BRIDGEPORT...OROVILLE... NESPELEM...DISAUTEL PASS...WATERVILLE...MANSFIELD... BADGER MOUNTAIN ROAD 405 AM PST FRI FEB 17 2012 ...WINTER WEATHER ADVISORY IN EFFECT FROM 4 PM THIS AFTERNOON TO 4 AM PST SATURDAY... THE NATIONAL WEATHER SERVICE IN SPOKANE HAS ISSUED A WINTER WEATHER ADVISORY FOR HEAVY SNOW...WHICH IS IN EFFECT FROM 4 PM THIS AFTERNOON TO 4 AM PST SATURDAY. * SNOW ACCUMULATIONS: 1 TO 3 INCHES ABOVE 1500 FEET FOR THE WENATCHEE VALLEY REGION...AND 2 TO 4 INCHES IN THE OKANOGAN VALLEY AND WATERVILLE PLATEAU. * WINDS: EAST UP TO 15MPH. * TEMPERATURES: IN THE LOWER 30S. * TIMING: A PERIOD OF HEAVY SNOW WILL SPREAD ACROSS THE CASCADES AND IMPACT THE WENATCHEE AND OKANOGAN VALLEY REGION THIS EVENING AND CONTINUE INTO SATURDAY MORNING. ISOLATED TO SCATTERED SNOW SHOWERS ARE EXPECTED THROUGH THE DAY SATURDAY HOWEVER. * LOCATIONS: WENATCHEE...CHELAN...ENTIAT...CASHMERE...OMAK... OKANOGAN...BREWSTER...BRIDGEPORT...OROVILLE...NESPELEM... DISAUTEL PASS...WATERVILLE...MANSFIELD...BADGER MOUNTAIN ROAD. * IMPACTS: HEAVY SNOWFALL WILL MAKE TRAVEL DANGEROUS ACROSS THE VALLEYS AND HIGHER TERRAIN...ESPECIALLY ALONG HIGHWAY 2 OVER THE WATEVILLE PLATEAU AND NORTH INTO THE OKANOGAN VALLEY. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ IDZ004-172015- /O.EXB.KOTX.WS.A.0004.120218T0600Z-120219T0600Z/ CENTRAL PANHANDLE MOUNTAINS- INCLUDING THE FOLLOWING LOCATIONS...OSBURN...WALLACE...MULLAN... FOURTH OF JULY PASS...DOBSON PASS...LOOKOUT PASS 405 AM PST FRI FEB 17 2012 ...WINTER STORM WATCH IN EFFECT FROM THIS EVENING THROUGH SATURDAY EVENING ABOVE 2500 FEET... THE NATIONAL WEATHER SERVICE IN SPOKANE HAS ISSUED A WINTER STORM WATCH ABOVE 2500 FEET...WHICH IS IN EFFECT FROM THIS EVENING THROUGH SATURDAY EVENING. * SNOW ACCUMULATIONS: POSSIBLE 2 TO 5 INCHES POSSIBLE IN THE VALLEYS ABOVE 2500 FEET...WITH 1 TO 3 INCHES BELOW. IN THE MOUNTAINS...POTENTIALLY 6 TO 8 INCHES. * HAZARD ELEVATION: ABOVE 2500 FEET. * LOCATIONS: OSBURN...WALLACE...MULLAN...FOURTH OF JULY PASS... DOBSON PASS...LOOKOUT PASS. * WINDS: SOUTHWEST 5 TO 15 MPH. GUSTS TO 35 MPH ALONG EXPOSED RIDGETOPS PRODUCING BLOWING AND DRIFTING SNOW. * TEMPERATURES: AROUND 30. * TIMING: HEAVY SNOW WILL SPREAD EAST INTO THE IDAHO PANHANDLE TONIGHT AND CONTINUE INTO SATURDAY. NUMEROUS SNOW SHOWERS ARE EXPECTED THROUGH THE DAY SATURDAY. * IMPACTS: HEAVY SNOWFALL WILL MAKE TRAVEL DANGEROUS ACROSS THE VALLEYS AND MOUNTAINS OF THE CENTRAL IDAHO PANHANDLE. INTERSTATE 90 WILL BE IMPACTED. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WATCH MEANS THERE IS A POTENTIAL FOR SIGNIFICANT SNOW ACCUMULATIONS THAT MAY IMPACT TRAVEL. CONTINUE TO MONITOR THE LATEST FORECASTS. && $$ IDZ001-172015- /O.EXT.KOTX.WS.A.0004.120218T0600Z-120219T0600Z/ NORTHERN PANHANDLE- INCLUDING THE FOLLOWING LOCATIONS...SANDPOINT...ATHOL... BONNERS FERRY...PRIEST RIVER...EASTPORT... SCHWEITZER MOUNTAIN ROAD 405 AM PST FRI FEB 17 2012 ...WINTER STORM WATCH NOW IN EFFECT FROM THIS EVENING THROUGH SATURDAY EVENING... * SNOW ACCUMULATIONS: POSSIBLE 3 TO 6 INCHES OF SNOW IN THE VALLEYS OF BONNER AND BOUNDARY COUNTY...ESPECIALLY NEAR THE BC BORDER. ELSEWHERE IN THE VALLEYS GENERALLY 1 TO 3 INCHES SOUTH OF SANDPOINT WILL BE POSSIBLE. IN THE MOUNTAINS...POTENTIALLY 6 TO 9 INCHES. * WINDS: SOUTH 5 TO 15 MPH. GUSTS TO 35 MPH ALONG EXPOSED RIDGETOPS PRODUCING BLOWING AND DRIFTING SNOW. * TEMPERATURES: AROUND 30. * TIMING: HEAVY SNOW WILL SPREAD EAST INTO THE NORTHERN IDAHO PANHANDLE TONIGHT AND CONTINUE INTO SATURDAY. NUMEROUS SNOW SHOWERS ARE EXPECTED THROUGH THE DAY SATURDAY. * LOCATIONS: PRIEST RIVER...EASTPORT...SCHWEITZER MOUNTAIN ROAD...SANDPOINT...BONNERS FERRY. * SNOW LEVEL: VALLEY FLOORS TOWARD THE CANADIAN BORDER... TRENDING TOWARD 2500 FEET SOUTH OF SANDPOINT. * IMPACTS: HEAVY SNOWFALL WILL MAKE TRAVEL DANGEROUS ACROSS THE VALLEYS AND MOUNTAINS OF NORTHERN WASHINGTON AND THE NORTH IDAHO PANHANDLE. HIGHWAY 95 WILL BE IMPACTED. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WATCH MEANS THERE IS A POTENTIAL FOR SIGNIFICANT SNOW ACCUMULATIONS THAT MAY IMPACT TRAVEL. CONTINUE TO MONITOR THE LATEST FORECASTS. && $$
049 WWUS46 KOTX 171951 WSWOTX URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE SPOKANE WA 1151 AM PST FRI FEB 17 2012 .A STRONG WINTER STORM MOVES THROUGH THE INLAND NORTHWEST TONIGHT INTO SATURDAY. WARMER AND MUCH MORE MOIST AIR WILL SURGE NORTH AHEAD OF THE SYSTEM...RUNNING INTO COLDER AIR IN PLACE OVER THE NORTHERN VALLEYS OF NORTHEASTERN WASHINGTON AND THE NORTHERN IDAHO PANHANDLE. SNOW WILL DEVELOP TONIGHT AND CONTINUE INTO SATURDAY ...AND OVER THE PANHANDLE THROUGH SUNDAY MORNING...WITH LOCALLY HEAVY ACCUMULATIONS POSSIBLE. WAZ037-180500- /O.CON.KOTX.WS.W.0005.120218T0600Z-120219T0000Z/ NORTHEAST MOUNTAINS- INCLUDING THE FOLLOWING LOCATIONS...COLVILLE...DEER PARK... CHEWELAH...NEWPORT...KETTLE FALLS...SPRINGDALE-HUNTERS ROAD... ORIN-RICE ROAD...FLOWERY TRAIL ROAD 1151 AM PST FRI FEB 17 2012 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 10 PM THIS EVENING TO 4 PM PST SATURDAY... * SNOW ACCUMULATIONS: 4 TO 6 INCHES OF SNOW IN THE VALLEYS ACROSS THE NORTHERN HALF OF STEVENS AND PEND OREILLE COUNTIES. ELSEWHERE IN THE VALLEYS EXPECT GENERALLY 1 TO 3 INCHES. IN THE MOUNTAINS...5 TO 8 INCHES. * WINDS: SOUTH 5 TO 15 MPH WITH GUSTS UP TO 30 MPH...ESPECIALLY ALONG EXPOSED RIDGETOPS. * TEMPERATURES: AROUND 30. * TIMING: SNOW WILL SPREAD ACROSS THE REGION BEGINNING THIS EVENING AND CONTINUE INTO SATURDAY. A PERIOD OF HEAVY SNOW IS EXPECTED OVERNIGHT TONIGHT. NUMEROUS SNOW SHOWERS ARE EXPECTED THROUGH THE DAY SATURDAY. * LOCATIONS: COLVILLE...CHEWELAH...NEWPORT...KETTLE FALLS SPRINGDALE... HUNTERS ROAD...ORIN-RICE ROAD...FLOWERY TRAIL ROAD. * SNOW LEVEL: VALLEY FLOORS TOWARD THE CANADIAN BORDER... TRENDING TOWARD 2500 FEET ACROSS THE SOUTHERN PART OF PEND OREILLE AND STEVENS COUNTY...INCLUDING DEER PARK AND KELLER. * IMPACTS: HEAVY SNOWFALL WILL MAKE TRAVEL DANGEROUS ACROSS THE VALLEYS AND MOUNTAINS OF NORTHEAST WASHINGTON. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING MEANS SIGNIFICANT AMOUNTS OF SNOW ARE EXPECTED OR OCCURRING. STRONG WINDS ARE ALSO POSSIBLE. THIS WILL MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE. && $$ IDZ001-004-180500- /O.UPG.KOTX.WS.A.0004.120218T0600Z-120219T0600Z/ /O.EXB.KOTX.WW.Y.0009.120218T0600Z-120219T1800Z/ NORTHERN PANHANDLE-CENTRAL PANHANDLE MOUNTAINS- INCLUDING THE FOLLOWING LOCATIONS...SANDPOINT...ATHOL... BONNERS FERRY...PRIEST RIVER...EASTPORT... SCHWEITZER MOUNTAIN ROAD...KELLOGG...PINEHURST...OSBURN... WALLACE...MULLAN...FOURTH OF JULY PASS...DOBSON PASS... LOOKOUT PASS 1151 AM PST FRI FEB 17 2012 ...WINTER WEATHER ADVISORY IN EFFECT FROM 10 PM THIS EVENING TO 10 AM PST SUNDAY... THE NATIONAL WEATHER SERVICE IN SPOKANE HAS ISSUED A WINTER WEATHER ADVISORY FOR SNOW...WHICH IS IN EFFECT FROM 10 PM THIS EVENING TO 10 AM PST SUNDAY. THE WINTER STORM WATCH IS NO LONGER IN EFFECT. * SNOW ACCUMULATIONS: 2 TO 4 INCHES OF SNOW IN THE VALLEYS WITH LOCAL AMOUNTS UP TO 6 INCHES...WITH 6 TO 10 INCHES IN THE MOUNTAINS. * WINDS: SOUTH 5 TO 15 MPH. GUSTS TO 35 MPH ALONG EXPOSED RIDGETOPS PRODUCING BLOWING AND DRIFTING SNOW. * TIMING: SNOW WILL SPREAD EAST INTO THE NORTHERN IDAHO PANHANDLE LATE TONIGHT AND CONTINUE INTO SATURDAY MORNING. A BRIEF BREAK IS POSSIBLE BEFORE NUMEROUS SNOW SHOWERS RE-DEVELOP SATURDAY AFTERNOON INTO SUNDAY MORNING. * LOCATIONS: SANDPOINT...ATHOL...BONNERS FERRY...PRIEST RIVER... EASTPORT...SCHWEITZER MOUNTAIN ROAD...KELLOGG...PINEHURST... OSBURN...WALLACE...MULLAN...FOURTH OF JULY PASS...DOBSON PASS...LOOKOUT PASS * SNOW LEVEL: VALLEY FLOORS TOWARD THE CANADIAN BORDER... TRENDING TOWARD 2500 FEET SOUTH OF SANDPOINT. * IMPACTS: SNOWFALL WILL MAKE TRAVEL DANGEROUS ACROSS THE VALLEYS AND MOUNTAINS OF THE IDAHO PANHANDLE. THIS INCLUDES INTERSTATE 90 AND HIGHWAY 95. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ WAZ042-180500- /O.EXB.KOTX.WW.Y.0009.120218T0000Z-120219T0000Z/ EAST SLOPES NORTHERN CASCADES- INCLUDING THE FOLLOWING LOCATIONS...LEAVENWORTH...MAZAMA... TWISP...WINTHROP...STEHEKIN...CONCONULLY...BLEWETT PASS... LOUP LOUP PASS 1151 AM PST FRI FEB 17 2012 ...WINTER WEATHER ADVISORY IN EFFECT FROM 4 PM THIS AFTERNOON TO 4 PM PST SATURDAY... THE NATIONAL WEATHER SERVICE IN SPOKANE HAS ISSUED A WINTER WEATHER ADVISORY FOR SNOW...WHICH IS IN EFFECT FROM 4 PM THIS AFTERNOON TO 4 PM PST SATURDAY. * SNOW ACCUMULATIONS: 3 TO 6 INCHES VALLEYS BELOW 3000 FEET... WITH 6 TO 12 INCHES IN THE MOUNTAINS. * WINDS: SOUTHEAST 10 TO 15 MPH WITH GUSTS UP TO 30 MPH. * TIMING: PERIOD OF SNOW WILL SPREAD ACROSS THE CASCADES LATE TODAY AND CONTINUE INTO SATURDAY. THE SNOW WILL BECOME MORE SCATTERED THROUGH SATURDAY...WITH THE HIGHER ACCUMULATIONS RETREATING TOWARD TO CREST. * LOCATIONS: LEAVENWORTH...MAZAMA...TWISP...WINTHROP... STEHEKIN...CONCONULLY...BLEWETT PASS...LOUP LOUP PASS * IMPACTS: MODERATE TO HEAVY SNOW WILL MAKE TRAVEL DANGEROUS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET...OR FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ WAZ038-041-043-044-180500- /O.CON.KOTX.WW.Y.0009.120218T0000Z-120218T1200Z/ OKANOGAN HIGHLANDS-WENATCHEE AREA-OKANOGAN VALLEY- WATERVILLE PLATEAU- INCLUDING THE FOLLOWING LOCATIONS...REPUBLIC...INCHELIUM... WAUCONDA...CHESAW ROAD...HIGHWAY 20 WAUCONDA SUMMIT... BOULDER CREEK ROAD...SHERMAN PASS...WENATCHEE...CHELAN...ENTIAT... CASHMERE...OMAK...OKANOGAN...BREWSTER...BRIDGEPORT...OROVILLE... NESPELEM...DISAUTEL PASS...WATERVILLE...MANSFIELD... BADGER MOUNTAIN ROAD 1151 AM PST FRI FEB 17 2012 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 4 PM THIS AFTERNOON TO 4 AM PST SATURDAY... * SNOW ACCUMULATIONS: 2 TO 4 INCHES VALLEYS BELOW 3000 FEET... WITH 4 TO 7 INCHES IN THE MOUNTAINS. * WINDS: SOUTHEAST 10 TO 15 MPH WITH GUSTS UP TO 30 MPH. * TIMING: A PERIOD OF HEAVY SNOW WILL SPREAD ACROSS THE OKANOGAN HIGHLANDS LATE TODAY AND CONTINUE INTO SATURDAY MORNING. SCATTERED SNOW SHOWERS ARE EXPECTED THROUGH THE DAY SATURDAY HOWEVER. * LOCATIONS: REPUBLIC...INCHELIUM...WAUCONDA...CHESAW ROAD... HIGHWAY 20 WAUCONDA SUMMIT...BOULDER CREEK ROAD...SHERMAN PASS. * IMPACTS: HEAVY SNOWFALL WILL MAKE TRAVEL DANGEROUS ACROSS THE VALLEYS AND MOUNTAINS OF NORTHERN WASHINGTON. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET...OR FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$
What forecasters said that day
The local office's own words before this winter storm watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Spokane, WA wrote its last area forecast discussion before this winter storm watch went out at Feb 16, 2:22 AM PST, 0 minutes earlier.
Area forecast discussion, Feb 16, 2:22 AM PST, 0 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SPOKANE WA
222 AM PST Thu Feb 16 2012
.SYNOPSIS...high pressure will move out of the region today as a weak
low pressure system is expected to move through British Columbia
and bring thechance for light snow to the Cascades, Northeast
Washington and North Idaho. A stronger weather system will pass
through the region Friday night and Saturday and result in widespread
rain and snow to the valleys and snow to the mountains. The active
weather pattern is expected to continue into early next week.
&&
.DISCUSSION...
Today through Friday...High pressure over the region this morning
will give way to a rapidly moving short wave disturbance that is
progged by the models to be on the BC/North Washington coast by
12z and across my extreme northeast corner of the Idaho Panhandle
by 00z. Isentropic lift along the 290-300k surface will be on the
increase across mainly the north Cascades just after 12z and push
east across the forecast area through the day. 85-7h winds are
mainly southwest or even a little south-southwest and orgraphics
will aid in the lifting process, and this will put the focus of
precipitation mainly north of highway 2. The satellite loops are
showing a compact but decent surge of moisture with the warm front
and model PW's are .35 to .40 which is just over a 100 percent of
normal. The cold front will follow roughly 6 hours behind the warm
front an bring a brief period of heavier precipitation. Still
precipitation amounts are expected to be only a few hundredths for
the lower elevations and up to a tenth of an inch in the
mountains. Precipitation as snow in the mountains with some of the
higher locations picking up an inch or two.
By this evening the cold front will have exited the forecast area
to the east with high pressure building into the Inland Northwest
through the night. Conditions will rapidly dry from the west
through the afternoon and early evening. Westerly flow behind the
front will keep orographic showers in the eastern mountains through
the night, with the possibility of light accumulations of snow in
the mountains. The combination of lingering boundary layer
moisture, clearing skies, and light winds will promote fog
formation where precipitation falls today. As such fog was added
to the northern valleys and along the Columbia and Spokane river.
On Friday the ridge of high pressure will track east across the
forecast area in response to the next weather disturbance that
will move into the Pacific Northwest Friday night. Some orographic
showers will still be possible near the ID/MT border otherwise
conditions will be mainly dry. The day should start out pretty nice
with clouds on the increase through the afternoon. Sun and weak
warm air advection will result in temperatures rising into the 40
and lower 50s. /Tobin
Friday night through Sunday night: Model agreement continues to
increase as the previous laggard of the model pack has become the
overall consensus. This is the GFS. The NAM and SREF solutions
have trended decidedly slower with the system that arrives Friday
night, which now places all of the most reliable mesoscale and
global guidance on a similar track. This means the forecast
generally follows along the lines of the GFS/ECMWF/NAM/SREF and
largely discounts the Canadian and UKMET.
By Friday evening, lift in the 285-295K layer has already
encompassed most of the western half of the CWA. In addition, low
level flow has turned southeasterly, forcing upslope flow into the
Cascades and Okanogan Highlands. This will help to enhance
precipitation rates in these areas, which via thermal profiles and
850 mb temperatures generally trending -2 to -4C across the western
half of the CWA in the evening generally means snow should be
falling. However, as the system crosses the area, a more
pronounced warm tongue evolves ahead of it. This drives 850 mb
temperatures up toward +1 to +4C over the southeastern third of
the CWA by the middle of Friday night. This looks likely to cause
snow levels to surge, especially south of I-90, however north of
Spokane and Coeur D'Alene, precipitation rates really take off
overnight. The consensus of the NAM and GFS is roughly 0.4 to 0.5"
of liquid equivalent in the 06-12z period, which with 850 mb
temperatures in the -2 to -4C range over the northern portions of
the CWA and snow ratios of roughly 12:1 could yield a good half of
a foot of snow in a very quick period. As a result, winter storm
watches have been hoisted with particular concern for the Okanogan
Highlands and northern Stevens and Pend Oreille, Boundary, and
northwestern Bonner Counties through the night. Precipitation
rates may allow for very fast accumulation through the night
before the storm exits east on Saturday with unstable snow showers
continuing through the day.
The upper trough hangs around overhead with a decent mid-level
cold pool as well through Sunday. As a result, upslope snow
showers with the much colder vertical profile in place seem likely
to continue in the terrain of the Idaho Panhandle through the
weekend. Elsewhere, downslope westerly low level flow will allow
for the sun to pop out across the Columbia Basin.
Beyond Sunday night: A period of short wave ridging looks to take
control of the area by roughly Monday as the cold pool exits to
the east. This should allow for much of the area to dry out. After
that time, however, the pattern becomes much more questionable as
the ridge off shore as shown signs in many model runs of
weakening, which could bring the Pacific moisture tap farther
south toward the area rather than keeping it to the north of the
CWA with the stronger off shore ridge scenarios. The forecast is
roughly trending currently toward higher than climo pops in the
mountains with lower than climo pops in the Columbia Basin. Given
the pattern evolution and uncertainty as to the presence and
intensity of a Pacific moisture tap, this approach seems
reasonable, so no changes were made to the extended. /Fries
&&
.AVIATION...
06Z TAFs: General high pressure in the area will still allow for
the potential for fog and low cloud formation overnight into
Thursday morning. Additionally a weather disturbance dropping down
in a northwest to southeast trajectory over the aviation area will
bring light rain and snow starting near 18Z Thursday that lingers
on past 6Z Friday over parts of North Idaho. The stratus and low
cloud ceilings and visibilities may be IFR with Precipitation
generated ceilings and visibilities mainly in the MVFR range. /Pelatti
&&
.PRELIMINARY POINT TEMPS/POPS...
Spokane 40 28 42 32 36 26 / 20 20 10 100 50 20
Coeur d'Alene 39 28 41 30 36 26 / 30 30 10 90 70 30
Pullman 41 31 45 33 37 27 / 10 20 10 100 50 30
Lewiston 46 33 51 35 42 30 / 10 20 10 80 40 20
Colville 39 23 42 29 37 21 / 60 20 10 100 60 20
Sandpoint 37 25 39 29 35 26 / 60 50 10 90 80 40
Kellogg 38 26 40 29 34 25 / 60 50 10 80 90 60
Moses Lake 44 30 47 32 42 24 / 10 10 10 90 10 10
Wenatchee 42 28 41 28 38 24 / 10 10 10 100 10 10
Omak 39 25 39 28 35 20 / 30 10 10 100 20 10
&&
.OTX WATCHES/WARNINGS/ADVISORIES...
ID...Winter Storm Watch from Friday evening through Saturday
afternoon for Northern Panhandle.
WA...Winter Storm Watch from Friday evening through Saturday
afternoon for Northeast Mountains-Okanogan Highlands.
&&Hazardous weather outlook, Feb 15, 3:22 PM PST, 11 hours before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SPOKANE WA 322 PM PST WED FEB 15 2012 IDZ001-004-WAZ037-038-041>044-162330- NORTHERN PANHANDLE-CENTRAL PANHANDLE MOUNTAINS- NORTHEAST MOUNTAINS-OKANOGAN HIGHLANDS-WENATCHEE AREA- EAST SLOPES NORTHERN CASCADES-OKANOGAN VALLEY-WATERVILLE PLATEAU- 322 PM PST WED FEB 15 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH IDAHO... CENTRAL WASHINGTON...NORTH CENTRAL WASHINGTON AND NORTHEAST WASHINGTON. .DAY ONE...THIS AFTERNOON AND TONIGHT NO HAZARDOUS WEATHER IS EXPECTED TONIGHT. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY FRIDAY NIGHT THROUGH SUNDAY MORNING...A STRONG PACIFIC STORM SYSTEM WILL TRACK THROUGH THE REGION BRINGING THE POTENTIAL FOR MODERATE MOUNTAIN SNOW ACCUMULATIONS ALONG WITH LIGHT TO MODERATE VALLEY SNOW ACCUMULATIONS. THOSE WITH TRAVEL INTERESTS ACROSS INTERSTATE 90 AND HIGHWAY 20 MOUNTAIN PASSES SHOULD BE PREPARED FOR WINTRY TRAVEL CONDITIONS. IDZ002-003-026-027-WAZ031>036-162330- COEUR D'ALENE AREA-IDAHO PALOUSE-LEWISTON AREA- LEWIS AND SOUTHERN NEZ PERCE COUNTIES-NORTHEAST BLUE MOUNTAINS- LOWER GARFIELD AND ASOTIN COUNTIES-WASHINGTON PALOUSE- MOSES LAKE AREA-UPPER COLUMBIA BASIN-SPOKANE AREA- 322 PM PST WED FEB 15 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH IDAHO... NORTH CENTRAL IDAHO...EAST CENTRAL WASHINGTON...NORTHEAST WASHINGTON AND SOUTHEAST WASHINGTON. .DAY ONE...THIS AFTERNOON AND TONIGHT NO HAZARDOUS WEATHER IS EXPECTED TONIGHT. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY FRIDAY NIGHT THROUGH SATURDAY NIGHT...A STRONG PACIFIC STORM SYSTEM WILL TRACK THROUGH THE REGION BRINGING THE POTENTIAL FOR GUSTY WINDS AND LIGHT TO LOCALLY MODERATE SNOW ACCUMULATIONS. PRECIPITATION WILL START AS RAIN LATE FRIDAY BEFORE CHANGING TO SNOW EARLY SATURDAY WITH SNOW SHOWERS POSSIBLE THROUGHOUT THE DAY SATURDAY AND SATURDAY NIGHT. THERE IS A SIGNIFICANT AMOUNT OF UNCERTAINTY WHERE THE MOST PERSISTENT SNOW SHOWERS AND HEAVIEST ACCUMULATIONS WILL OCCUR ON SATURDAY AND SATURDAY NIGHT.
Nearby
Winter Storm Watches in Idaho, 2012Winter Storm Watches in Washington, 2012Every winter storm watch in 2012
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.