Alert archive / Nebraska / Tornado Warnings in 2011
Tornado Warning 36, NWS Cheyenne, WY
NWS Cheyenne, WY issued this tornado warning at Aug 29, 2011, 5:17 PM MDT for Dawes County, Nebraska. It was in force for 15 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
- Aug 29, 2011, 5:17 PM MDT (23:17 UTC)
- Expired
- Aug 29, 2011, 5:32 PM MDT
- In force
- 15 min
- Issued by
- NWS Cheyenne, WY
- Area
- Storm-based polygon
County Dawes County, NE
The radar
The Rapid City radar (KUDX), 161 km from the middle of the area, began a volume at 23:18 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, 11.3 hours before the alert went out and 155 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
- 357 J/kg
- Mixed-layer CIN
- -85 J/kg
- Mixed-layer LCL
- 1211 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- -14 m²/s²
- 0-3 km storm-relative helicity
- -20 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.1
The text
As transmitted, in the capitals the NWS used until 2016.
590 WFUS55 KCYS 292317 TORCYS NEC045-292345- /O.NEW.KCYS.TO.W.0036.110829T2317Z-110829T2345Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE CHEYENNE WY 517 PM MDT MON AUG 29 2011 THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A * TORNADO WARNING FOR... EAST CENTRAL DAWES COUNTY IN THE PANHANDLE OF NEBRASKA... * UNTIL 545 PM MDT * AT 510 PM MDT...THE PUBLIC REPORTED A TORNADO JUST SOUTHWEST OF CHADRON. DOPPLER RADAR SHOWED THIS TORNADO MOVING EAST AT 35 MPH. * THE TORNADO WILL AFFECT MAINLY RURAL AREAS OF EAST CENTRAL DAWES COUNTY. PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS TORNADO WARNING REPLACES THE SEVERE THUNDERSTORM WARNING THAT WAS IN EFFECT FOR THE SAME AREA. TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE IN CHEYENNE. && LAT...LON 4274 10279 4253 10278 4264 10298 4274 10297 TIME...MOT...LOC 2316Z 283DEG 31KT 4266 10288 $$ RUBIN
2 follow-up statements
770 WWUS55 KCYS 292329 SVSCYS SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 529 PM MDT MON AUG 29 2011 NEC045-292345- /O.CON.KCYS.TO.W.0036.000000T0000Z-110829T2345Z/ DAWES NE- 529 PM MDT MON AUG 29 2011 ...A TORNADO WARNING REMAINS IN EFFECT FOR EAST CENTRAL DAWES COUNTY UNTIL 545 PM MDT... AT 510 PM MDT...THE PUBLIC REPORTED A TORNADO 5 MILES SOUTH OF CHADRON. THIS RADAR INDICATED TORNADO WAS LOCATED 5 MILES WEST OF HAY SPRINGS...MOVING EAST AT 35 MPH. THE TORNADO WILL AFFECT MAINLY RURAL AREAS OF EAST CENTRAL DAWES COUNTY. PRECAUTIONARY/PREPAREDNESS ACTIONS... TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE IN CHEYENNE. && LAT...LON 4274 10284 4274 10279 4253 10278 4258 10287 TIME...MOT...LOC 2328Z 283DEG 31KT 4264 10274 $$ RUBIN
016 WWUS55 KCYS 292332 SVSCYS SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 532 PM MDT MON AUG 29 2011 NEC045-292342- /O.CAN.KCYS.TO.W.0036.000000T0000Z-110829T2345Z/ DAWES NE- 532 PM MDT MON AUG 29 2011 ...THE TORNADO WARNING FOR EAST CENTRAL DAWES COUNTY IS CANCELLED... THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED AREA. LAT...LON 4274 10284 4274 10279 4253 10278 4258 10287 TIME...MOT...LOC 2332Z 283DEG 31KT 4263 10269 $$ RUBIN
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 28, 6:49 PM MDT | Special Weather Statement | CYS | Kimball | 56 min |
| Aug 28, 8:20 PM MDT | Special Weather Statement | CYS | Banner | 55 min |
| Aug 29, 1:34 PM MDT | Flash Flood Warning | CYS | Cheyenne | 3 hr |
| Aug 29, 1:43 PM MDT | Severe Thunderstorm Warning | CYS | Cheyenne | 49 min |
| Aug 29, 2:42 PM MDT | Severe Thunderstorm Warning | CYS | Sioux | 63 min |
| Aug 29, 3:20 PM MDT | Special Weather Statement | CYS | Cheyenne | 55 min |
| Aug 29, 3:25 PM MDT | Severe Thunderstorm Warning | CYS | Banner, Kimball, Scotts Bluff | 65 min |
| Aug 29, 3:41 PM MDT | Severe Thunderstorm Warning | CYS | Dawes, Sioux | 64 min |
| Aug 29, 4:12 PM MDT | Flash Flood Warning | CYS | Banner, Cheyenne, Kimball | 3 hr |
| Aug 29, 4:21 PM MDT | Severe Thunderstorm Warning | CYS | Banner, Cheyenne, Kimball, Morrill, Scotts Bluff | 54 min |
| Aug 29, 4:49 PM MDT | Special Weather Statement | CYS | Dawes | 56 min |
| Aug 29, 4:53 PM MDT | Severe Thunderstorm Warning | CYS | Box Butte, Dawes | 25 min |
| Aug 29, 5:13 PM MDT | Severe Thunderstorm Warning | CYS | Cheyenne | 29 min |
Nearby
Tornado Warnings in Nebraska, 2011Every tornado warning in 2011Tornadoes 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.