Alert archive / Idaho / Winter Storm Warnings in 2011
Winter Storm Warning 13, NWS Spokane, WA
NWS Spokane, WA issued this winter storm warning at May 25, 2011, 11:35 AM PDT for 5 counties in Washington; 6 counties in Idaho. It took effect at May 26, 2011, 2:00 AM PDT. It was in force for 15 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- May 25, 2011, 11:35 AM PDT (18:35 UTC)
- In effect from
- May 26, 2011, 2:00 AM PDT
- Expired
- May 26, 2011, 5:06 PM PDT
- In force
- 15 hr
- 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 18:34 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Spokane, WA (KOTX), launched 12:00Z, 6.6 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
- 765 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 147 m²/s²
- 0-3 km storm-relative helicity
- 143 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
975 WWUS46 KOTX 251835 WSWOTX URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE SPOKANE WA 1135 AM PDT WED MAY 25 2011 ...LATE SEASON SNOW EXPECTED IN THE MOUNTAINS... A STRONG LOW PRESSURE SYSTEM WILL SEND A BAND OF HEAVY PRECIPITATION INTO THE MOUNTAINS TONIGHT INTO THURSDAY MORNING. INITIALLY RAIN WILL FALL THEN QUICKLY CHANGE OVER TO SNOW ABOVE 4000 FEET. IDZ001-004-WAZ037-038-260245- /O.UPG.KOTX.WS.A.0007.110526T0900Z-110526T1800Z/ /O.NEW.KOTX.WS.W.0013.110526T0900Z-110526T1800Z/ NORTHERN PANHANDLE-CENTRAL PANHANDLE MOUNTAINS- NORTHEAST MOUNTAINS-OKANOGAN HIGHLANDS- INCLUDING THE FOLLOWING LOCATIONS...SCHWEITZER MOUNTAIN ROAD... MULLAN...LOOKOUT PASS...FLOWERY TRAIL ROAD...CHESAW ROAD... HIGHWAY 20 WAUCONDA SUMMIT...BOULDER CREEK ROAD...SHERMAN PASS 1135 AM PDT WED MAY 25 2011 ...WINTER STORM WARNING IN EFFECT FROM 2 AM TO 11 AM PDT THURSDAY ABOVE 4000 FEET... THE NATIONAL WEATHER SERVICE IN SPOKANE HAS ISSUED A WINTER STORM WARNING ABOVE 4000 FEET FOR HEAVY SNOW WHICH IS IN EFFECT FROM 2 AM TO 11 AM PDT THURSDAY. THE WINTER STORM WATCH IS NO LONGER IN EFFECT. * SNOW ACCUMULATIONS: POSSIBLE ACCUMULATIONS OF 3 TO 5 INCHES. * ELEVATION: ABOVE 4000 FEET. * TIMING: RAIN WILL DEVELOP LATE TONIGHT...CHANGING OVER TO SNOW BETWEEN 2 AM AND 5 AM ON THURSDAY FOR THE CENTRAL PANHANDLE MOUNTAINS AND NOT UNTIL AFTER 5 AM FOR THE NORTHERN PANHANDLE MOUNTAINS...THE NORTHEAST MOUNTAINS AND THE OKANOGAN HIGHLANDS. THE SNOW WILL BEGIN TO TAPER OFF MID MORNING OVER THE CENTRAL PANHANDLE MOUNTAINS...INCLUDING INTERSTATE 90 OVER LOOKOUT PASS. AREAS CLOSER TO THE CANADIAN BORDER WILL SEE MOUNTAIN SNOW THROUGH LATE MORNING HOURS. * LOCATIONS INCLUDE: CHESAW ROAD...HIGHWAY 20 WAUCONDA SUMMIT...BOULDER CREEK ROAD...SHERMAN PASS...SCHWEITZER MOUNTAIN ROAD... FLOWERY TRAIL ROAD...MULLAN...LOOKOUT PASS * WINDS: SOUTHWEST 10 TO 20 MPH. RIDGE TOP WIND GUSTS UP TO 40 MPH POSSIBLE. * IMPACTS: HEAVY SNOWFALL INTENSITY WILL MAKE TRAVEL EXTRA DIFFICULT DUE TO LOW VISIBILITY...AS WELL AS THE POTENTIAL FOR SLUSHY ROADWAYS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING FOR HEAVY SNOW MEANS SIGNIFICANT AMOUNTS OF SNOW ARE EXPECTED OR OCCURRING. SNOW ACCUMULATIONS WILL MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE. && $$
5 follow-up statements
985 WWUS46 KOTX 260111 WSWOTX URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE SPOKANE WA 611 PM PDT WED MAY 25 2011 ...LATE SEASON SNOW EXPECTED IN THE MOUNTAINS... A STRONG LOW PRESSURE SYSTEM WILL SEND A BAND OF HEAVY PRECIPITATION INTO THE MOUNTAINS TONIGHT INTO THURSDAY MORNING. INITIALLY RAIN WILL FALL THEN QUICKLY CHANGE OVER TO SNOW ABOVE 4000 FEET. IDZ001-004-WAZ037-038-261200- /O.CON.KOTX.WS.W.0013.110526T0900Z-110526T1800Z/ NORTHERN PANHANDLE-CENTRAL PANHANDLE MOUNTAINS- NORTHEAST MOUNTAINS-OKANOGAN HIGHLANDS- INCLUDING THE FOLLOWING LOCATIONS...SCHWEITZER MOUNTAIN ROAD... MULLAN...LOOKOUT PASS...FLOWERY TRAIL ROAD...CHESAW ROAD... HIGHWAY 20 WAUCONDA SUMMIT...BOULDER CREEK ROAD...SHERMAN PASS 611 PM PDT WED MAY 25 2011 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 2 AM TO 11 AM PDT THURSDAY ABOVE 4000 FEET... A WINTER STORM WARNING ABOVE 4000 FEET REMAINS IN EFFECT FROM 2 AM TO 11 AM PDT THURSDAY. * SNOW ACCUMULATIONS: POSSIBLE ACCUMULATIONS OF 3 TO 5 INCHES. * ELEVATION: ABOVE 4000 FEET. * TIMING: RAIN WILL DEVELOP LATE TONIGHT...CHANGING OVER TO SNOW BETWEEN 2 AM AND 5 AM ON THURSDAY FOR THE CENTRAL PANHANDLE MOUNTAINS AND NOT UNTIL AFTER 5 AM FOR THE NORTHERN PANHANDLE MOUNTAINS...THE NORTHEAST MOUNTAINS AND THE OKANOGAN HIGHLANDS. THE SNOW WILL BEGIN TO TAPER OFF MID MORNING OVER THE CENTRAL PANHANDLE MOUNTAINS...INCLUDING INTERSTATE 90 OVER LOOKOUT PASS. AREAS CLOSER TO THE CANADIAN BORDER WILL SEE MOUNTAIN SNOW THROUGH LATE MORNING HOURS. * LOCATIONS INCLUDE: CHESAW ROAD...HIGHWAY 20 WAUCONDA SUMMIT... BOULDER CREEK ROAD...SHERMAN PASS...SCHWEITZER MOUNTAIN ROAD... FLOWERY TRAIL ROAD...MULLAN...LOOKOUT PASS * WINDS: SOUTHWEST 10 TO 20 MPH. RIDGE TOP WIND GUSTS UP TO 40 MPH POSSIBLE. * IMPACTS: HEAVY SNOWFALL INTENSITY WILL MAKE TRAVEL EXTRA DIFFICULT DUE TO LOW VISIBILITY...AS WELL AS THE POTENTIAL FOR SLUSHY ROADWAYS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING FOR HEAVY SNOW MEANS SIGNIFICANT AMOUNTS OF SNOW ARE EXPECTED OR OCCURRING. SNOW ACCUMULATIONS WILL MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE. && $$
691 WWUS46 KOTX 261009 WSWOTX URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE SPOKANE WA 309 AM PDT THU MAY 26 2011 ...LATE SEASON SNOW EXPECTED IN THE MOUNTAINS... A STRONG LOW PRESSURE SYSTEM WILL SEND A BAND OF HEAVY PRECIPITATION INTO THE MOUNTAINS THROUGH THIS MORNING. INITIALLY SNOW LEVELS WILL BE ABOVE PASS LEVELS OVER THE MOUNTAINS NEAR THE CANADIAN BORDER. BUT DURING THE EARLY TO MID MORNING HOURS SNOW LEVELS WILL FALL TO NEAR 4000 FEET. IDZ001-004-WAZ037-038-261800- /O.CON.KOTX.WS.W.0013.000000T0000Z-110526T1800Z/ NORTHERN PANHANDLE-CENTRAL PANHANDLE MOUNTAINS- NORTHEAST MOUNTAINS-OKANOGAN HIGHLANDS- INCLUDING THE FOLLOWING LOCATIONS...SCHWEITZER MOUNTAIN ROAD... MULLAN...LOOKOUT PASS...FLOWERY TRAIL ROAD...CHESAW ROAD... HIGHWAY 20 WAUCONDA SUMMIT...BOULDER CREEK ROAD...SHERMAN PASS 309 AM PDT THU MAY 26 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM PDT THIS MORNING ABOVE 4000 FEET... A WINTER STORM WARNING ABOVE 4000 FEET REMAINS IN EFFECT UNTIL 11 AM PDT THIS MORNING. * SNOW ACCUMULATIONS: 3 TO 5 INCHES. * ELEVATION: ABOVE 4000 FEET. * TIMING: RAIN WILL CHANGE TO SNOW BY 5 AM FOR THE CENTRAL PANHANDLE MOUNTAINS AND NOT UNTIL AFTER 5 AM FOR THE NORTHERN PANHANDLE MOUNTAINS...THE NORTHEAST MOUNTAINS AND THE OKANOGAN HIGHLANDS. * LOCATIONS INCLUDE: CHESAW ROAD...HIGHWAY 20 WAUCONDA SUMMIT... BOULDER CREEK ROAD...SHERMAN PASS...SCHWEITZER MOUNTAIN ROAD... FLOWERY TRAIL ROAD...MULLAN...LOOKOUT PASS * WINDS: SOUTHWEST 10 TO 20 MPH. RIDGE TOP WIND GUSTS UP TO 40 MPH POSSIBLE. * IMPACTS: HEAVY SNOWFALL INTENSITY WILL MAKE TRAVEL EXTRA DIFFICULT DUE TO LOW VISIBILITY...AS WELL AS THE POTENTIAL FOR SLUSHY ROADWAYS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING FOR HEAVY SNOW MEANS SIGNIFICANT AMOUNTS OF SNOW ARE EXPECTED OR OCCURRING. SNOW ACCUMULATIONS WILL MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE. && $$
942 WWUS46 KOTX 261748 WSWOTX URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE SPOKANE WA 1048 AM PDT THU MAY 26 2011 ...LATE SEASON SNOW EXPECTED IN THE MOUNTAINS... THE STRONG SPRING STORM SYSTEM HAS SLOWED OVER THE NORTHERN MOUNTAINS THIS MORNING. THIS WILL CONTINUE THE MODERATE TO HEAVY PRECIPITATION OVER THE MOUNTAINS TODAY. TSNOW LEVELS LOWERED TO NEAR 4000 FEET...BUT EXPECT A SLOW INCREASE THROUGH THE LATE AFTERNOON HOURS. IDZ004-261900- /O.CAN.KOTX.WS.W.0013.000000T0000Z-110526T1800Z/ CENTRAL PANHANDLE MOUNTAINS- INCLUDING THE FOLLOWING LOCATIONS...MULLAN...LOOKOUT PASS 1048 AM PDT THU MAY 26 2011 ...WINTER STORM WARNING IS CANCELLED... THE NATIONAL WEATHER SERVICE IN SPOKANE HAS CANCELLED THE WINTER STORM WARNING. SCATTERED RAIN AND SNOW SHOWERS ARE EXPECTED FOR THE REST OF THE DAY IN SHOSHONE COUNTY BUT ANY SNOW ACCUMULATIONS WILL REMAIN BELOW WARNING CRITERIA. $$ IDZ001-WAZ037-038-262100- /O.EXT.KOTX.WS.W.0013.000000T0000Z-110526T2100Z/ NORTHERN PANHANDLE-NORTHEAST MOUNTAINS-OKANOGAN HIGHLANDS- INCLUDING THE FOLLOWING LOCATIONS...SCHWEITZER MOUNTAIN ROAD... FLOWERY TRAIL ROAD...CHESAW ROAD...HIGHWAY 20 WAUCONDA SUMMIT... BOULDER CREEK ROAD...SHERMAN PASS 1048 AM PDT THU MAY 26 2011 ...WINTER STORM WARNING NOW IN EFFECT UNTIL 2 PM PDT THIS AFTERNOON ABOVE 4000 FEET... THE WINTER STORM WARNING ABOVE 4000 FEET IS NOW IN EFFECT UNTIL 2 PM PDT THIS AFTERNOON. * SNOW ACCUMULATIONS: 3 TO 5 INCHES. * ELEVATION: ABOVE 4000 FEET. * TIMING: RAIN HAS CHANGED OVER TO SNOW THIS MORNING FOR THE NORTHERN PANHANDLE MOUNTAINS...THE NORTHEAST MOUNTAINS AND THE OKANOGAN HIGHLANDS. HIGH ELEVATION SNOW IS EXPECTED TO CONINTUE THROUGH THE AFTERNOON. * LOCATIONS INCLUDE: CHESAW ROAD...HIGHWAY 20 WAUCONDA SUMMIT... BOULDER CREEK ROAD...SHERMAN PASS...SCHWEITZER MOUNTAIN ROAD... FLOWERY TRAIL ROAD. * WINDS: SOUTHWEST 10 TO 20 MPH. RIDGE TOP WIND GUSTS UP TO 30 MPH POSSIBLE. * IMPACTS: HEAVY SNOWFALL INTENSITY WILL MAKE TRAVEL EXTRA DIFFICULT DUE TO LOW VISIBILITY...AS WELL AS THE POTENTIAL FOR SLUSHY ROADWAYS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING FOR HEAVY SNOW MEANS SIGNIFICANT AMOUNTS OF SNOW ARE EXPECTED OR OCCURRING. SNOW ACCUMULATIONS WILL MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE. && $$
243 WWUS46 KOTX 262052 WSWOTX URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE SPOKANE WA 152 PM PDT THU MAY 26 2011 ...LATE SEASON SNOW EXPECTED IN THE MOUNTAINS... THE STRONG SPRING STORM SYSTEM HAS WILL SLOWLY PUSH NORTHEAST INTO BRITISH COLUMBIA THIS EVENING. LIGHT TO MODERATE PRECIPITATION WILL CONTINUE TO FALL OVER THE NORTHEAST AND PANHANDLE MOUNTAINS NEAR THE CANADIAN BORDER INTO THIS EVENING. SNOW LEVELS REMAIN AT OR JUST ABOVE 4000 FEET. WAZ038-262200- /O.CAN.KOTX.WS.W.0013.000000T0000Z-110526T2100Z/ OKANOGAN HIGHLANDS- INCLUDING THE FOLLOWING LOCATIONS...CHESAW ROAD... HIGHWAY 20 WAUCONDA SUMMIT...BOULDER CREEK ROAD...SHERMAN PASS 152 PM PDT THU MAY 26 2011 ...WINTER STORM WARNING IS CANCELLED... THE NATIONAL WEATHER SERVICE IN SPOKANE HAS CANCELLED THE WINTER STORM WARNING. SCATTERED RAIN AND SNOW SHOWERS ARE EXPECTED TO LINGER INTO THIS EVENING. BUT ANY ADDITIONAL SNOW ACCUMULATIONS WILL BE VERY LIGHT. $$ IDZ001-WAZ037-270500- /O.EXT.KOTX.WS.W.0013.000000T0000Z-110527T0600Z/ NORTHERN PANHANDLE-NORTHEAST MOUNTAINS- INCLUDING THE FOLLOWING LOCATIONS...SCHWEITZER MOUNTAIN ROAD 152 PM PDT THU MAY 26 2011 ...WINTER STORM WARNING NOW IN EFFECT UNTIL 11 PM PDT THIS EVENING ABOVE 4000 FEET... THE WINTER STORM WARNING ABOVE 4000 FEET IS NOW IN EFFECT UNTIL 11 PM PDT THIS EVENING. * SNOW ACCUMULATIONS: TOTAL ACCUMULATIONS 3 TO 5 INCHES. * ELEVATION: ABOVE 4000 FEET. * TIMING: SNOW WILL CONTINUE FOR PANHANDLE AND THE NORTHEAST MOUNTAINS NEAR THE CANADIAN BORDER THROUGH EARLY EVENING. * LOCATIONS INCLUDE: SCHWEITZER MOUNTAIN ROAD. * WINDS: SOUTHWEST 10 TO 15 MPH. RIDGE TOP WIND GUSTS UP TO 20 MPH POSSIBLE. * IMPACTS: HEAVY SNOWFALL INTENSITY WILL MAKE TRAVEL EXTRA DIFFICULT DUE TO LOW VISIBILITY...AS WELL AS THE POTENTIAL FOR SLUSHY ROADWAYS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING FOR HEAVY SNOW MEANS SIGNIFICANT AMOUNTS OF SNOW ARE EXPECTED OR OCCURRING. SNOW ACCUMULATIONS WILL MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE. && $$
861 WWUS46 KOTX 270006 WSWOTX URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE SPOKANE WA 506 PM PDT THU MAY 26 2011 IDZ001-WAZ037-270115- /O.CAN.KOTX.WS.W.0013.000000T0000Z-110527T0600Z/ NORTHERN PANHANDLE-NORTHEAST MOUNTAINS- INCLUDING THE FOLLOWING LOCATIONS...SCHWEITZER MOUNTAIN ROAD 506 PM PDT THU MAY 26 2011 ...WINTER STORM WARNING IS CANCELLED... THE NATIONAL WEATHER SERVICE IN SPOKANE HAS CANCELLED THE WINTER STORM WARNING. THE WIDESPREAD SNOW HAS ENDED ACROSS THE NORTHERN IDAHO PANHANDLE MOUNTAINS AND THE NORTHEAST MOUNTAINS OF WASHINGTON. SCATTERED RAIN AND SNOW SHOWERS WILL CONTINUE THROUGH THIS EVENING. HOWEVER ANY ADDITIONAL SNOW ACCUMULATIONS WILL BE VERY LIGHT. $$ LN
The office that day
Everything else NWS Spokane, WA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 25, 3:29 AM PDT | River Flood Watch | OTX | Asotin | 16 hr |
| May 25, 3:31 AM PDT | Winter Storm Watch | OTX | Ferry, Okanogan, Pend Oreille, Spokane, Stevens | 8 hr |
| May 25, 3:29 AM PDT | River Flood Watch | OTX | Kootenai, Shoshone | 32 hr |
| May 25, 3:29 AM PDT | River Flood Watch | OTX | Boundary | 32 hr |
Nearby
Winter Storm Warnings in Idaho, 2011Winter Storm Warnings in Washington, 2011Every winter storm warning in 2011
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.