Alert archive / Idaho / Winter Storm Warnings in 2011
Winter Storm Warning 9, NWS Spokane, WA
NWS Spokane, WA issued this winter storm warning at Apr 4, 2011, 5:52 AM PDT for 4 counties in Idaho. It took effect at Apr 4, 2011, 9:20 AM PDT. It was in force for 26 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
- Apr 4, 2011, 5:52 AM PDT (12:52 UTC)
- In effect from
- Apr 4, 2011, 9:20 AM PDT
- Expired
- Apr 5, 2011, 11:01 AM PDT
- In force
- 26 hr
- Issued by
- NWS Spokane, WA
Counties Benewah County, ID, Kootenai County, ID, Latah County, ID, Shoshone County, ID
The radar
The Spokane radar (KOTX), 97 km from the middle of the area, began a volume at 12:53 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, 0.9 hours before the alert went out and 49 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
- 1116 m above ground
- 0-6 km bulk shear
- 75 kt
- 0-1 km storm-relative helicity
- 154 m²/s²
- 0-3 km storm-relative helicity
- 171 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
128 WWUS46 KOTX 041252 WSWOTX URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE SPOKANE WA 552 AM PDT MON APR 4 2011 IDZ004-042100- /O.UPG.KOTX.WS.A.0006.110405T0000Z-110406T0000Z/ /O.NEW.KOTX.WS.W.0009.110405T0000Z-110406T0000Z/ CENTRAL PANHANDLE MOUNTAINS- 552 AM PDT MON APR 4 2011 ...WINTER STORM WARNING IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 PM PDT TUESDAY ABOVE 4500 FEET... THE NATIONAL WEATHER SERVICE IN SPOKANE HAS ISSUED A WINTER STORM WARNING ABOVE 4500 FEET FOR HEAVY SNOW WHICH IS IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 PM PDT TUESDAY. THE WINTER STORM WATCH IS NO LONGER IN EFFECT. * SNOW ACCUMULATIONS: 5 TO 9 INCHES POSSIBLE. * ELEVATION: ABOVE 4500 FEET. * TIMING: SNOW LEVELS WILL FALL LATE THIS AFTERNOON AND REMAIN LOW ENOUGH TO PRODUCE ACCUMULATING SNOWS THROUGH TUESDAY. * LOCATIONS INCLUDE: LOOKOUT PASS ALONG INTERSTATE 90. * WINDS: WINDS WILL BECOME GUSTY MONDAY NIGHT AND TUESDAY... WITH GUSTS AROUND 45 MPH POSSIBLE ON EXPOSED MOUNTAIN RIDGES. THIS WILL PRODUCE BLOWING SNOW. * IMPACTS: MOTORISTS SHOULD EXPECT HEAVY SNOW ACCUMULATIONS AT THE HIGHEST PASSES SUCH AS LOOKOUT PASS. 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. && $$
5 follow-up statements
847 WWUS46 KOTX 041620 AAA WSWOTX URGENT - WINTER WEATHER MESSAGE...UPDATED NATIONAL WEATHER SERVICE SPOKANE WA 920 AM PDT MON APR 4 2011 IDZ004-050030- /O.EXT.KOTX.WS.W.0009.110404T1620Z-110406T0000Z/ CENTRAL PANHANDLE MOUNTAINS- 920 AM PDT MON APR 4 2011 ...WINTER STORM WARNING NOW IN EFFECT UNTIL 5 PM PDT TUESDAY ABOVE 4500 FEET... THE WINTER STORM WARNING ABOVE 4500 FEET IS NOW IN EFFECT UNTIL 5 PM PDT TUESDAY. * SNOW ACCUMULATIONS: 5 TO 10 INCHES. THOUGH 1 TO 2 INCHES WILL BE LIKELY AS LOW AS 3500 FEET. * ELEVATION: ABOVE 4500 FEET FOR THE HEAVIEST SNOWS. * TIMING: SNOW LEVELS WILL BRIEFLY RISE THIS AFTERNOON...THEN FALL OVERNIGHT...AND REMAIN LOW ENOUGH TO PRODUCE ACCUMULATING SNOWS THROUGH TUESDAY. THE SNOW MAY BRIEFLY CHANGE TO RAIN AT LOOKOUT PASS THIS AFTERNOON...THEN TRANSITION TO SNOW THIS EVENING. * LOCATIONS INCLUDE: LOOKOUT PASS ALONG INTERSTATE 90. * WINDS: WINDS WILL BECOME GUSTY TONIGHT AND TUESDAY... WITH GUSTS AROUND 45 MPH POSSIBLE ON EXPOSED MOUNTAIN RIDGES. THIS WILL PRODUCE BLOWING SNOW. * IMPACTS: MOTORISTS SHOULD EXPECT HEAVY SNOW ACCUMULATIONS AT THE HIGHEST PASSES SUCH AS LOOKOUT PASS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING FOR HEAVY SNOW MEANS SIGNIFICANT AMOUNTS OF SNOW ARE EXPECTED OR OCCURRING. SNOW ACCUMULATIONS WILL MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE. && $$
254 WWUS46 KOTX 042140 WSWOTX URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE SPOKANE WA 240 PM PDT MON APR 4 2011 IDZ004-050600- /O.CON.KOTX.WS.W.0009.000000T0000Z-110406T0000Z/ CENTRAL PANHANDLE MOUNTAINS- 240 PM PDT MON APR 4 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM PDT TUESDAY ABOVE 4500 FEET... A WINTER STORM WARNING ABOVE 4500 FEET REMAINS IN EFFECT UNTIL 5 PM PDT TUESDAY. * SNOW ACCUMULATIONS: 5 TO 10 INCHES. THOUGH 1 TO 2 INCHES WILL BE LIKELY AS LOW AS 3500 FEET. * ELEVATION: ABOVE 4500 FEET FOR THE HEAVIEST SNOWS. * TIMING: SNOW LEVELS WILL BRIEFLY RISE...THEN FALL OVERNIGHT...AND REMAIN LOW ENOUGH TO PRODUCE ACCUMULATING SNOWS THROUGH TUESDAY. THE SNOW MAY BRIEFLY CHANGE TO RAIN AT LOOKOUT PASS THROUGH EARLY EVENING...BEFORE CHANGING BACK TO SNOW LATE THIS EVENING INTO TUESDAY. * LOCATIONS INCLUDE: LOOKOUT PASS ALONG INTERSTATE 90. * WINDS: WINDS WILL BECOME GUSTY TONIGHT AND TUESDAY... WITH GUSTS AROUND 45 MPH POSSIBLE ON EXPOSED MOUNTAIN RIDGES. THIS WILL PRODUCE BLOWING SNOW. * IMPACTS: MOTORISTS SHOULD EXPECT HEAVY SNOW ACCUMULATIONS AT THE HIGHEST PASSES SUCH AS LOOKOUT PASS. 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. && $$
357 WWUS46 KOTX 050418 WSWOTX URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE SPOKANE WA 918 PM PDT MON APR 4 2011 IDZ004-051330- /O.CON.KOTX.WS.W.0009.000000T0000Z-110406T0000Z/ CENTRAL PANHANDLE MOUNTAINS- 918 PM PDT MON APR 4 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM PDT TUESDAY ABOVE 4500 FEET... A WINTER STORM WARNING ABOVE 4500 FEET REMAINS IN EFFECT UNTIL 5 PM PDT TUESDAY. * SNOW ACCUMULATIONS: 5 TO 10 INCHES. THOUGH 1 TO 2 INCHES WILL BE LIKELY AS LOW AS 3500 FEET. * ELEVATION: ABOVE 4500 FEET FOR THE HEAVIEST SNOWS. * TIMING: SNOW LEVELS WILL FALL OVERNIGHT...AND REMAIN LOW ENOUGH TO PRODUCE ACCUMULATING SNOWS THROUGH TUESDAY. THE SNOW MAY BRIEFLY CHANGE TO RAIN AT LOOKOUT PASS THROUGH EARLY EVENING...BEFORE CHANGING BACK TO SNOW LATE THIS EVENING INTO TUESDAY. * LOCATIONS INCLUDE: LOOKOUT PASS ALONG INTERSTATE 90. * WINDS: WINDS WILL BECOME GUSTY TONIGHT AND TUESDAY... WITH GUSTS AROUND 45 MPH POSSIBLE ON EXPOSED MOUNTAIN RIDGES. THIS WILL PRODUCE BLOWING SNOW. * IMPACTS: MOTORISTS SHOULD EXPECT HEAVY SNOW ACCUMULATIONS AT THE HIGHEST PASSES SUCH AS LOOKOUT PASS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING FOR HEAVY SNOW MEANS SIGNIFICANT AMOUNTS OF SNOW ARE EXPECTED OR OCCURRING. SNOW ACCUMULATIONS WILL MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE. && $$
572 WWUS46 KOTX 051307 WSWOTX URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE SPOKANE WA 607 AM PDT TUE APR 5 2011 IDZ004-052200- /O.CON.KOTX.WS.W.0009.000000T0000Z-110406T0000Z/ CENTRAL PANHANDLE MOUNTAINS- 607 AM PDT TUE APR 5 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM PDT THIS AFTERNOON ABOVE 4500 FEET... A WINTER STORM WARNING ABOVE 4500 FEET REMAINS IN EFFECT UNTIL 5 PM PDT THIS AFTERNOON. * SNOW ACCUMULATIONS: 5 TO 10 INCHES. * ELEVATION: ABOVE 4500 FEET. * TIMING: SNOW LEVELS WILL CONTINUE TO FALL THIS MORNING AND REMAIN LOW ENOUGH FOR ACCUMULATING SNOWS THROUGH TODAY. * LOCATIONS INCLUDE: LOOKOUT PASS ALONG INTERSTATE 90. * WINDS: WINDS WILL BECOME GUSTY TODAY... WITH GUSTS AROUND 45 MPH POSSIBLE ON EXPOSED MOUNTAIN RIDGES. THIS WILL PRODUCE BLOWING SNOW. * IMPACTS: MOTORISTS SHOULD EXPECT HEAVY SNOW ACCUMULATIONS AT THE HIGHEST PASSES SUCH AS LOOKOUT PASS. 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. && $$
933 WWUS46 KOTX 051801 WSWOTX URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE SPOKANE WA 1101 AM PDT TUE APR 5 2011 IDZ004-051915- /O.CAN.KOTX.WS.W.0009.000000T0000Z-110406T0000Z/ CENTRAL PANHANDLE MOUNTAINS- 1101 AM PDT TUE APR 5 2011 ...WINTER STORM WARNING IS CANCELLED... THE NATIONAL WEATHER SERVICE IN SPOKANE HAS CANCELLED THE WINTER STORM WARNING. THE THREAT OF WIDESPREAD SIGNIFICANT SNOW ACCUMULATIONS HAS ENDED. WHILE SCATTERED SNOW SHOWERS ARE EXPECTED TO CONTINUE THROUGH THE DAY ABOVE 3500 TO 4000 FEET...MAINLY ISOLATED ACCUMULATIONS UP TO 2 INCHES ARE EXPECTED IN THE MORE PERSISTENT SHOWERS. $$
The office that day
Everything else NWS Spokane, WA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 4, 12:11 PM PDT | Areal Flood Advisory | OTX | Benewah, Bonner, Boundary, Kootenai, Latah, Lewis and 2 more | 44 hr |
Nearby
Winter Storm Warnings in Idaho, 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.