Alert archive / Nebraska / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 134, NWS Cheyenne, WY
NWS Cheyenne, WY issued this severe thunderstorm warning at Aug 26, 2021, 9:42 PM MDT for Box Butte County, Dawes County, Nebraska. It was in force for 48 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
- Aug 26, 2021, 9:42 PM MDT (03:42 UTC)
- Expired
- Aug 26, 2021, 10:30 PM MDT
- In force
- 48 min
- Issued by
- NWS Cheyenne, WY
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Box Butte County, NE, Dawes County, NE
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 26, 9:52 PM MDT | HAIL 0.7 | Hemingford, NE |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Rapid City, SD (KUNR), launched 00:00Z, 3.7 hours before the alert went out and 188 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
- 1372 J/kg
- Mixed-layer CIN
- -139 J/kg
- Mixed-layer LCL
- 1154 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 71 m²/s²
- 0-3 km storm-relative helicity
- 214 m²/s²
- Significant tornado parameter
- 0.5
- Supercell composite
- 2.7
The text
As transmitted.
535
WUUS55 KCYS 270342
SVRCYS
NEC013-045-270430-
/O.NEW.KCYS.SV.W.0134.210827T0342Z-210827T0430Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Cheyenne WY
942 PM MDT Thu Aug 26 2021
The National Weather Service in Cheyenne has issued a
* Severe Thunderstorm Warning for...
Northern Box Butte County in the Panhandle of Nebraska...
Southeastern Dawes County in the Panhandle of Nebraska...
* Until 1030 PM MDT.
* At 942 PM MDT, a severe thunderstorm was located near Hemingford,
or 20 miles northwest of Alliance, moving northeast at 30 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage
to roofs, siding, and trees.
* Locations impacted include...
Hemingford, Wild Horse Butte, Box Butte Campground, Berea and Box
Butte Dam.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4211 10315 4239 10333 4261 10278 4260 10277
4245 10277 4244 10275 4230 10274
TIME...MOT...LOC 0342Z 240DEG 25KT 4231 10316
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Mokry1 follow-up statement
967
WWUS55 KCYS 270420
SVSCYS
Severe Weather Statement
National Weather Service Cheyenne WY
1020 PM MDT Thu Aug 26 2021
NEC013-045-270430-
/O.EXP.KCYS.SV.W.0134.000000T0000Z-210827T0430Z/
Box Butte NE-Dawes NE-
1020 PM MDT Thu Aug 26 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN BOX BUTTE AND
SOUTHEASTERN DAWES COUNTIES WILL EXPIRE AT 1030 PM MDT...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.
LAT...LON 4211 10315 4239 10333 4261 10278 4260 10277
4245 10277 4244 10275 4230 10274
TIME...MOT...LOC 0420Z 240DEG 25KT 4244 10286
$$
MokryThe office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 26, 9:11 PM MDT | Special Weather Statement | CYS | Box Butte | 34 min |
Nearby
Severe Thunderstorm Warnings in Nebraska, 2021Every severe thunderstorm warning in 2021
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.