Alert archive / Nebraska / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 46, NWS Cheyenne, WY

June 10, 2021Dawes County, Sioux County, Nebraska

NWS Cheyenne, WY issued this severe thunderstorm warning at Jun 10, 2021, 9:38 PM MDT for Dawes County, Sioux County, Nebraska. It was in force for 32 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: Jun 10, 2021, 9:38 PM MDT (03:38 UTC)
Expired: Jun 10, 2021, 10:10 PM MDT
In force: 32 min
Issued by: NWS Cheyenne, WY
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

Counties Dawes County, NE, Sioux County, NE

The radar

The Rapid City radar (KUDX), 147 km from the middle of the area, began a volume at 03:38 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
Jun 10, 8:08 PM MDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Rapid City, SD (KUNR), launched 00:00Z, 3.6 hours before the alert went out and 140 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: 1559 J/kg
Mixed-layer CIN: -71 J/kg
Mixed-layer LCL: 2700 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 88 m²/s²
0-3 km storm-relative helicity: 177 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 15.0

Open this sounding in Storm Lab

The text

As transmitted.

267 
WUUS55 KCYS 110338
SVRCYS
NEC045-165-110430-
/O.NEW.KCYS.SV.W.0046.210611T0338Z-210611T0430Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Cheyenne WY
938 PM MDT Thu Jun 10 2021

The National Weather Service in Cheyenne has issued a

* Severe Thunderstorm Warning for...
  Northwestern Dawes County in the Panhandle of Nebraska...
  Northeastern Sioux County in the Panhandle of Nebraska...

* Until 1030 PM MDT.

* At 938 PM MDT, a severe thunderstorm was located near Montrose, or
  27 miles south of Edgemont, moving east at 35 mph.

  HAZARD...60 mph wind gusts and half dollar size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* This severe thunderstorm will be near...
  Montrose around 945 PM MDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4283 10317 4280 10391 4299 10396 4301 10390
      4300 10324
TIME...MOT...LOC 0338Z 248DEG 28KT 4290 10382 

HAIL...1.25IN
WIND...60MPH
 
$$

Rubin

2 follow-up statements

167 
WWUS55 KCYS 110353
SVSCYS

Severe Weather Statement
National Weather Service Cheyenne WY
953 PM MDT Thu Jun 10 2021

NEC045-165-110430-
/O.CON.KCYS.SV.W.0046.000000T0000Z-210611T0430Z/
Dawes NE-Sioux NE-
953 PM MDT Thu Jun 10 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1030 PM MDT
FOR NORTHWESTERN DAWES AND NORTHEASTERN SIOUX COUNTIES...

At 953 PM MDT, a severe thunderstorm was located over Montrose, or 26
miles south of Edgemont, moving east at 30 mph.

HAZARD...60 mph wind gusts and half dollar size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

This severe thunderstorm will remain over mainly rural areas of
northwestern Dawes and northeastern Sioux Counties.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4280 10381 4300 10377 4300 10324 4283 10317
TIME...MOT...LOC 0353Z 251DEG 24KT 4293 10369 

HAIL...1.25IN
WIND...60MPH
 
$$

Rubin

478 
WWUS55 KCYS 110410
SVSCYS

Severe Weather Statement
National Weather Service Cheyenne WY
1010 PM MDT Thu Jun 10 2021

NEC045-165-110420-
/O.CAN.KCYS.SV.W.0046.000000T0000Z-210611T0430Z/
Dawes NE-Sioux NE-
1010 PM MDT Thu Jun 10 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN DAWES AND
NORTHEASTERN SIOUX COUNTIES IS CANCELLED...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 200 AM MDT for 
much of the Panhandle of Nebraska.

LAT...LON 4280 10381 4300 10377 4300 10324 4283 10317
TIME...MOT...LOC 0408Z 248DEG 28KT 4298 10352 

$$

Rubin

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 10, 9:24 PM MDT	Special Weather Statement	CYS	Sioux	51 min
Jun 10, 9:26 PM MDT	Special Weather Statement	CYS	Sioux	49 min
Jun 10, 10:03 PM MDT	Special Weather Statement	CYS	Sioux	42 min
Jun 10, 10:23 PM MDT	Severe Thunderstorm Warning	CYS	Dawes, Sioux	67 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.