Alert archive / Nebraska / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 109, NWS Cheyenne, WY

July 16, 2021Box Butte County, Dawes County, Nebraska

NWS Cheyenne, WY issued this severe thunderstorm warning at Jul 16, 2021, 7:33 PM MDT for Box Butte County, Dawes County, Nebraska. It was in force for 42 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: Jul 16, 2021, 7:33 PM MDT (01:33 UTC)
Expired: Jul 16, 2021, 8:15 PM MDT
In force: 42 min
Issued by: NWS Cheyenne, WY
Area: Storm-based polygon
Hail: 1.5 in
Wind: 60.0 mph

Counties Box Butte County, NE, Dawes County, NE

The radar

The Rapid City radar (KUDX), 169 km from the middle of the area, began a volume at 01:32 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 16, 3:55 PM MDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Rapid City, SD (KUNR), launched 00:00Z, 1.6 hours before the alert went out and 163 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 3551 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 73 m²/s²
0-3 km storm-relative helicity: 211 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

543 
WUUS55 KCYS 170133
SVRCYS
NEC013-045-170215-
/O.NEW.KCYS.SV.W.0109.210717T0133Z-210717T0215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Cheyenne WY
733 PM MDT Fri Jul 16 2021

The National Weather Service in Cheyenne has issued a

* Severe Thunderstorm Warning for...
  Northeastern Box Butte County in the Panhandle of Nebraska...
  Southeastern Dawes County in the Panhandle of Nebraska...

* Until 815 PM MDT.

* At 732 PM MDT, a severe thunderstorm was located 7 miles southeast
  of Chadron, moving south at 10 mph.

  HAZARD...Ping pong ball size hail and 60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...People and animals outdoors will be injured. Expect hail 
           damage to roofs, siding, windows, and vehicles. Expect 
           wind damage to roofs, siding, and trees.

* Locations impacted include...
  Red Cloud Campground, Chadron Campground and Chadron St Park. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4244 10293 4254 10299 4276 10304 4280 10294
      4274 10288 4271 10277 4261 10278 4260 10277
      4244 10278
TIME...MOT...LOC 0132Z 341DEG 7KT 4278 10287 

HAIL...1.50IN
WIND...60MPH
 
$$

Mokry

2 follow-up statements

855 
WWUS55 KCYS 170158
SVSCYS

Severe Weather Statement
National Weather Service Cheyenne WY
758 PM MDT Fri Jul 16 2021

NEC013-170207-
/O.CAN.KCYS.SV.W.0109.000000T0000Z-210717T0215Z/
Box Butte NE-
758 PM MDT Fri Jul 16 2021

...THE SEVERE THUNDERSTORM WARNING FOR BOX BUTTE COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has weakened and 
moved out of the warned area.  Therefore, the warning has been 
cancelled.

A Severe Thunderstorm Watch remains in effect until 1100 PM MDT for
the Panhandle of Nebraska.

LAT...LON 4244 10293 4252 10295 4263 10291 4269 10292
      4272 10284 4271 10277 4261 10278 4260 10277
      4244 10278
TIME...MOT...LOC 0157Z 341DEG 7KT 4273 10285 

$$

NEC045-170215-
/O.CON.KCYS.SV.W.0109.000000T0000Z-210717T0215Z/
Dawes NE-
758 PM MDT Fri Jul 16 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 PM MDT
FOR SOUTHEASTERN DAWES COUNTY...

At 757 PM MDT, a severe thunderstorm was located 8 miles east of Red
Cloud Campground, or 8 miles northwest of Hay Springs, moving south
at 10 mph.

HAZARD...60 mph wind gusts and penny size hail.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

This severe thunderstorm will remain over mainly rural areas of
southeastern Dawes County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4244 10293 4252 10295 4263 10291 4269 10292
      4272 10284 4271 10277 4261 10278 4260 10277
      4244 10278
TIME...MOT...LOC 0157Z 341DEG 7KT 4273 10285 

HAIL...0.75IN
WIND...60MPH
 
$$

Mokry

524 
WWUS55 KCYS 170209
SVSCYS

Severe Weather Statement
National Weather Service Cheyenne WY
809 PM MDT Fri Jul 16 2021

NEC045-170218-
/O.EXP.KCYS.SV.W.0109.000000T0000Z-210717T0215Z/
Dawes NE-
809 PM MDT Fri Jul 16 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN DAWES COUNTY WILL
EXPIRE AT 815 PM MDT...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire.  However gusty winds are still possible with
this thunderstorm.

A Severe Thunderstorm Watch remains in effect until 1100 PM MDT for
the Panhandle of Nebraska.

LAT...LON 4244 10293 4252 10295 4263 10291 4269 10292
      4272 10284 4271 10277 4261 10278 4260 10277
      4244 10278
TIME...MOT...LOC 0208Z 341DEG 7KT 4271 10284 

$$

Mokry

The office that day

Everything else NWS Cheyenne, WY issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 16, 6:59 PM MDT	Special Weather Statement	CYS	Dawes	31 min
Jul 16, 7:10 PM MDT	Severe Thunderstorm Warning	CYS	Dawes	35 min
Jul 16, 9:31 PM MDT	Special Weather Statement	CYS	Box Butte	44 min
Jul 17, 4:20 PM MDT	Special Weather Statement	CYS	Sioux	40 min
Jul 17, 4:59 PM MDT	Special Weather Statement	CYS	Sioux	31 min
Jul 17, 5:03 PM MDT	Special Weather Statement	CYS	Kimball	27 min
Jul 17, 5:29 PM MDT	Special Weather Statement	CYS	Kimball	31 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2021 Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.