Alert archive / Nebraska / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 93, NWS Cheyenne, WY

July 9, 2021Dawes County, Nebraska

NWS Cheyenne, WY issued this severe thunderstorm warning at Jul 9, 2021, 8:47 PM MDT for Dawes County, Nebraska. It was in force for 43 min. 3 reports 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: Jul 9, 2021, 8:47 PM MDT (02:47 UTC)
Expired: Jul 9, 2021, 9:30 PM MDT
In force: 43 min
Issued by: NWS Cheyenne, WY
Area: Storm-based polygon
Tornado: Possible
Hail: 1.5 in
Wind: 60.0 mph

County Dawes County, NE

The radar

The Rapid City radar (KUDX), 149 km from the middle of the area, began a volume at 02:49 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
Jul 9, 9:03 PM MDT	HAIL 1	7 Wsw Chadron, NE
Jul 9, 9:23 PM MDT	HAIL 1.5	8 Wsw Chadron, NE	SPOTTER REPORTED BROKEN WINDOWS
Jul 9, 9:28 PM MDT	TSTM WND GST 62	4 W Chadron, NE

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
Jul 9, 2:16 PM MDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Rapid City, SD (KUNR), launched 00:00Z, 2.8 hours before the alert went out and 142 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: 240 J/kg
Mixed-layer CIN: -260 J/kg
Mixed-layer LCL: 2327 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: -35 m²/s²
0-3 km storm-relative helicity: 76 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

As transmitted.

576 
WUUS55 KCYS 100247
SVRCYS
NEC045-100330-
/O.NEW.KCYS.SV.W.0093.210710T0247Z-210710T0330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Cheyenne WY
847 PM MDT Fri Jul 9 2021

The National Weather Service in Cheyenne has issued a

* Severe Thunderstorm Warning for...
  Central Dawes County in the Panhandle of Nebraska...

* Until 930 PM MDT.

* At 846 PM MDT, a severe thunderstorm was located 7 miles north of
  Whitney Lake, or 15 miles west of Chadron, moving east at 35 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...
  Chadron, Chadron Campground, Whitney Lake, Red Cloud Campground,
  Chadron Airport, Whitney and Chadron St Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4281 10342 4298 10336 4290 10279 4279 10279
      4278 10277 4251 10278
TIME...MOT...LOC 0246Z 288DEG 31KT 4290 10329 

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

Brothers

2 follow-up statements

042 
WWUS55 KCYS 100305
SVSCYS

Severe Weather Statement
National Weather Service Cheyenne WY
905 PM MDT Fri Jul 9 2021

NEC045-100330-
/O.CON.KCYS.SV.W.0093.000000T0000Z-210710T0330Z/
Dawes NE-
905 PM MDT Fri Jul 9 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 930 PM MDT
FOR CENTRAL DAWES COUNTY...

At 905 PM MDT, a severe thunderstorm was located near Chadron
Airport, or 7 miles southwest of Chadron, moving southeast at 40 mph.

HAZARD...Two inch 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...
Chadron, Chadron Campground, Whitney Lake, Red Cloud Campground,
Chadron Airport, Whitney and Chadron St Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This storm is producing large hail. SEEK SHELTER NOW inside a sturdy
structure and stay away from windows.

&&

LAT...LON 4281 10342 4298 10336 4290 10279 4279 10279
      4278 10277 4251 10278
TIME...MOT...LOC 0305Z 303DEG 33KT 4276 10312 

TORNADO...POSSIBLE
HAIL...2.00IN
WIND...60MPH
 
$$

Brothers

738 
WWUS55 KCYS 100315
SVSCYS

Severe Weather Statement
National Weather Service Cheyenne WY
915 PM MDT Fri Jul 9 2021

NEC045-100330-
/O.CON.KCYS.SV.W.0093.000000T0000Z-210710T0330Z/
Dawes NE-
915 PM MDT Fri Jul 9 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 930 PM MDT
FOR CENTRAL DAWES COUNTY...

At 915 PM MDT, a severe thunderstorm was located over Chadron
Campground, or 8 miles south of Chadron, moving southeast at 35 mph.

HAZARD...Two inch 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.

This severe thunderstorm will remain over mainly rural areas of
central Dawes County, including the following locations... Whitney
and Chadron St Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This storm is producing large hail. SEEK SHELTER NOW inside a sturdy
structure and stay away from windows.

&&

LAT...LON 4281 10342 4298 10336 4290 10279 4279 10279
      4278 10277 4251 10278
TIME...MOT...LOC 0315Z 304DEG 30KT 4270 10304 

TORNADO...POSSIBLE
HAIL...2.00IN
WIND...60MPH
 
$$

Brothers

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 9, 6:07 PM MDT	Tornado Warning	CYS	Morrill	26 min
Jul 9, 8:04 PM MDT	Severe Thunderstorm Warning	CYS	Sioux	41 min
Jul 9, 8:31 PM MDT	Tornado Warning	CYS	Sioux	44 min
Jul 9, 9:01 PM MDT	Severe Thunderstorm Warning	CYS	Box Butte, Dawes, Sioux	44 min
Jul 9, 9:22 PM MDT	Severe Thunderstorm Warning	CYS	Box Butte, Dawes	38 min
Jul 9, 9:33 PM MDT	Severe Thunderstorm Warning	CYS	Box Butte, Dawes, Morrill, Sioux	57 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.