Alert archive / Nebraska / Tornado Warnings in 2017
Tornado Warning 26, NWS Cheyenne, WY
NWS Cheyenne, WY issued this tornado warning at Jun 12, 2017, 8:07 PM MDT for Box Butte County, Morrill County, Nebraska. It was in force for 21 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jun 12, 2017, 8:07 PM MDT (02:07 UTC)
- Expired
- Jun 12, 2017, 8:28 PM MDT
- In force
- 21 min
- Issued by
- NWS Cheyenne, WY
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 4.0 in
Counties Box Butte County, NE, Morrill County, NE
The radar
The North Platte radar (KLNX), 185 km from the middle of the area, began a volume at 02:08 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 12, 8:15 PM MDT | TORNADO | 8 S Alliance, NE | POSSIBLE TORNADO. A BUSINESS LOST HALF ITS ROOF. WINDOWS AND DOORS WERE BLOWN IN. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jun 12, 1:11 PM MDT | Tornado Watch | SPC | 8 hr |
The nearest sounding before it
N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 2.1 hours before the alert went out and 207 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
- 1352 J/kg
- Mixed-layer CIN
- -142 J/kg
- Mixed-layer LCL
- 2089 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 65 m²/s²
- 0-3 km storm-relative helicity
- 194 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 6.9
The text
As transmitted.
143
WFUS55 KCYS 130207
TORCYS
NEC013-123-130245-
/O.NEW.KCYS.TO.W.0026.170613T0207Z-170613T0245Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Cheyenne WY
807 PM MDT MON JUN 12 2017
The National Weather Service in Cheyenne has issued a
* Tornado Warning for...
Southeastern Box Butte County in the Panhandle of Nebraska...
Northeastern Morrill County in the Panhandle of Nebraska...
* Until 845 PM MDT
* At 807 PM MDT, a severe thunderstorm capable of producing a tornado
was located 7 miles southwest of Alliance Airport, or 7 miles south
of Alliance, moving east at 40 mph.
HAZARD...Tornado and softball size hail.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed.
Damage to roofs, windows, and vehicles will occur. Tree
damage is likely.
* This dangerous storm will be near...
Alliance Airport around 815 PM MDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!
&&
LAT...LON 4194 10305 4206 10305 4209 10271 4207 10270
4201 10270 4200 10267 4191 10268 4190 10268
TIME...MOT...LOC 0207Z 267DEG 37KT 4200 10293
TORNADO...RADAR INDICATED
HAIL...4.00IN
$$
Hammer1 follow-up statement
721
WWUS55 KCYS 130228
SVSCYS
Severe Weather Statement
National Weather Service Cheyenne WY
828 PM MDT MON JUN 12 2017
NEC013-123-130237-
/O.CAN.KCYS.TO.W.0026.000000T0000Z-170613T0245Z/
Box Butte NE-Morrill NE-
828 PM MDT MON JUN 12 2017
...THE TORNADO WARNING FOR SOUTHEASTERN BOX BUTTE AND NORTHEASTERN
MORRILL COUNTIES IS CANCELLED...
The tornadic thunderstorm which prompted the warning has weakened.
Therefore, the warning has been cancelled.
A Severe Thunderstorm Warning remains in effect until 845 PM MDT.
A tornado watch remains in effect until 900 PM MDT for the Panhandle
of Nebraska.
LAT...LON 4194 10305 4206 10305 4209 10271 4207 10270
4201 10270 4200 10267 4191 10268 4190 10268
TIME...MOT...LOC 0225Z 267DEG 37KT 4201 10264
$$
HammerThe office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 12, 6:06 PM MDT | Tornado Warning | CYS | Banner, Scotts Bluff | 24 min |
| Jun 12, 6:12 PM MDT | Severe Thunderstorm Warning | CYS | Dawes, Sioux | 33 min |
| Jun 12, 6:26 PM MDT | Tornado Warning | CYS | Scotts Bluff | 34 min |
| Jun 12, 6:30 PM MDT | Tornado Warning | CYS | Banner, Scotts Bluff | 30 min |
| Jun 12, 6:34 PM MDT | Severe Thunderstorm Warning | CYS | Dawes | 41 min |
| Jun 12, 6:57 PM MDT | Tornado Warning | CYS | Box Butte, Morrill, Scotts Bluff | 33 min |
| Jun 12, 6:59 PM MDT | Tornado Warning | CYS | Banner, Morrill, Scotts Bluff | 31 min |
| Jun 12, 7:10 PM MDT | Tornado Warning | CYS | Banner, Morrill, Scotts Bluff | 35 min |
| Jun 12, 7:28 PM MDT | Tornado Warning | CYS | Box Butte, Morrill, Scotts Bluff | 47 min |
| Jun 12, 7:58 PM MDT | Severe Thunderstorm Warning | CYS | Box Butte, Morrill | 47 min |
| Jun 12, 10:02 PM MDT | Severe Thunderstorm Warning | CYS | Sioux | 28 min |
| Jun 12, 10:23 PM MDT | Tornado Warning | CYS | Dawes, Sioux | 37 min |
| Jun 12, 11:24 PM MDT | Special Weather Statement | CYS | Dawes | 51 min |
| Jun 13, 12:10 AM MDT | Special Weather Statement | CYS | Dawes | 50 min |
Nearby
Tornado Warnings in Nebraska, 2017Every tornado warning in 2017Tornadoes in 2017
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.