Alert archive / Nebraska / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 4, NWS Cheyenne, WY
NWS Cheyenne, WY issued this severe thunderstorm warning at Apr 26, 2012, 5:01 PM MDT for 4 counties in Nebraska. It was in force for 37 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Apr 26, 2012, 5:01 PM MDT (23:01 UTC)
- Expired
- Apr 26, 2012, 5:38 PM MDT
- In force
- 37 min
- Issued by
- NWS Cheyenne, WY
- Area
- Storm-based polygon
- Hail
- 1.5 in
- Wind
- 60.0 mph
Counties Box Butte County, NE, Morrill County, NE, Scotts Bluff County, NE, Sioux County, NE
The radar
The Cheyenne radar (KCYS), 161 km from the middle of the area, began a volume at 23:00 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
Rapid City, SD (KUNR), launched 12:00Z, 11.0 hours before the alert went out and 226 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
- 974 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 33 m²/s²
- 0-3 km storm-relative helicity
- 196 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
602 WUUS55 KCYS 262301 SVRCYS NEC013-123-157-165-270000- /O.NEW.KCYS.SV.W.0004.120426T2301Z-120427T0000Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE CHEYENNE WY 501 PM MDT THU APR 26 2012 THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHWESTERN BOX BUTTE COUNTY IN THE PANHANDLE OF NEBRASKA... NORTHWESTERN MORRILL COUNTY IN THE PANHANDLE OF NEBRASKA... NORTHEASTERN SCOTTS BLUFF COUNTY IN THE PANHANDLE OF NEBRASKA... EXTREME SOUTHEASTERN SIOUX COUNTY IN THE PANHANDLE OF NEBRASKA... * UNTIL 600 PM MDT * AT 456 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR LAKE MINATARE...OR 14 MILES NORTHEAST OF SCOTTSBLUFF...AND MOVING NORTHEAST AT 10 MPH. * LOCATIONS IMPACTED INCLUDE... KILPATRICK LAKE. PRECAUTIONARY/PREPAREDNESS ACTIONS... IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR LARGE HAIL AND DAMAGING WINDS. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER... PREFERABLY INSIDE A STRONG BUILDING AND AWAY FROM WINDOWS. TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS. && LAT...LON 4223 10319 4196 10304 4189 10351 4198 10356 TIME...MOT...LOC 2300Z 245DEG 7KT 4198 10343 WIND...HAIL 60MPH 1.50IN $$ HAMMER/MAZUR
2 follow-up statements
151 WWUS55 KCYS 262326 SVSCYS SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 526 PM MDT THU APR 26 2012 NEC013-123-157-165-270000- /O.CON.KCYS.SV.W.0004.000000T0000Z-120427T0000Z/ BOX BUTTE NE-MORRILL NE-SCOTTS BLUFF NE-SIOUX NE- 526 PM MDT THU APR 26 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EXTREME SOUTHEASTERN SIOUX...NORTHEASTERN SCOTTS BLUFF...NORTHWESTERN MORRILL AND SOUTHWESTERN BOX BUTTE COUNTIES UNTIL 600 PM MDT... AT 522 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR KILPATRICK LAKE...OR 22 MILES WEST OF ALLIANCE...MOVING NORTHEAST AT 15 MPH. LOCATIONS IMPACTED INCLUDE... KILPATRICK LAKE. PRECAUTIONARY/PREPAREDNESS ACTIONS... PREPARE IMMEDIATELY FOR LARGE HAIL AND DAMAGING WINDS IF YOU ARE IN THE PATH OF THIS STORM. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER... PREFERABLY INSIDE A STRONG BUILDING AND AWAY FROM WINDOWS. TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS. && LAT...LON 4223 10319 4196 10304 4191 10339 4205 10346 TIME...MOT...LOC 2325Z 249DEG 14KT 4206 10328 WIND...HAIL 60MPH 1.00IN $$ HAMMER/COX
796 WWUS55 KCYS 262338 SVSCYS SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 538 PM MDT THU APR 26 2012 NEC013-123-157-165-262348- /O.CAN.KCYS.SV.W.0004.000000T0000Z-120427T0000Z/ BOX BUTTE NE-MORRILL NE-SCOTTS BLUFF NE-SIOUX NE- 538 PM MDT THU APR 26 2012 ...THE SEVERE THUNDERSTORM WARNING FOR EXTREME SOUTHEASTERN SIOUX... NORTHEASTERN SCOTTS BLUFF...NORTHWESTERN MORRILL AND SOUTHWESTERN BOX BUTTE COUNTIES IS CANCELLED... THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY. HOWEVER...GUSTY WINDS AND HEAVY RAIN ARE STILL POSSIBLE WITH THIS THUNDERSTORM. LAT...LON 4223 10319 4196 10304 4191 10339 4205 10346 TIME...MOT...LOC 2338Z 249DEG 14KT 4208 10322 $$ HAMMER/COX
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 26, 11:05 AM MDT | Wind Advisory | CYS | Banner, Box Butte, Cheyenne, Dawes, Kimball, Morrill and 2 more | 10 hr |
| Apr 26, 1:51 PM MDT | Special Weather Statement | CYS | Box Butte | 54 min |
| Apr 26, 2:39 PM MDT | Wind Advisory | CYS | Banner, Box Butte, Cheyenne, Dawes, Kimball, Morrill and 2 more | 30 hr |
| Apr 26, 2:45 PM MDT | Special Weather Statement | CYS | Box Butte | 60 min |
| Apr 26, 3:27 PM MDT | Special Weather Statement | CYS | Scotts Bluff | 63 min |
| Apr 26, 3:50 PM MDT | Severe Thunderstorm Warning | CYS | Box Butte | 40 min |
| Apr 26, 3:58 PM MDT | Severe Thunderstorm Warning | CYS | Box Butte, Morrill, Scotts Bluff, Sioux | 62 min |
| Apr 26, 4:04 PM MDT | Flash Flood Warning | CYS | Box Butte | 6 hr |
| Apr 26, 4:30 PM MDT | Severe Thunderstorm Warning | CYS | Box Butte | 18 min |
| Apr 26, 5:02 PM MDT | Flash Flood Warning | CYS | Scotts Bluff | 6 hr |
| Apr 26, 5:09 PM MDT | Special Weather Statement | CYS | Box Butte | 66 min |
| Apr 26, 5:35 PM MDT | Special Weather Statement | CYS | Box Butte | 25 min |
Nearby
Severe Thunderstorm Warnings in Nebraska, 2012Every severe thunderstorm warning 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.