Alert archive / Nebraska / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 72, NWS Cheyenne, WY

July 3, 2021Scotts Bluff County, Sioux County, Nebraska; Goshen County, Wyoming

NWS Cheyenne, WY issued this severe thunderstorm warning at Jul 3, 2021, 3:01 PM MDT for Scotts Bluff County, Sioux County, Nebraska; Goshen County, Wyoming. It was in force for 30 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: Jul 3, 2021, 3:01 PM MDT (21:01 UTC)
Expired: Jul 3, 2021, 3:31 PM MDT
In force: 30 min
Issued by: NWS Cheyenne, WY
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Scotts Bluff County, NE, Sioux County, NE, Goshen County, WY

The radar

The Cheyenne radar (KCYS), 117 km from the middle of the area, began a volume at 21:01 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 3, 3:20 PM MDT	HAIL 1	9 Sse Torrington, WY	SHREDDED LEAVES.

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 12:00Z, 9.0 hours before the alert went out and 245 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: 444 J/kg
Mixed-layer CIN: -308 J/kg
Mixed-layer LCL: 2214 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 38 m²/s²
0-3 km storm-relative helicity: 54 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

779 
WUUS55 KCYS 032101
SVRCYS
NEC157-165-WYC015-032200-
/O.NEW.KCYS.SV.W.0072.210703T2101Z-210703T2200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Cheyenne WY
301 PM MDT Sat Jul 3 2021

The National Weather Service in Cheyenne has issued a

* Severe Thunderstorm Warning for...
  Northwestern Scotts Bluff County in the Panhandle of Nebraska...
  Southwestern Sioux County in the Panhandle of Nebraska...
  East central Goshen County in southeastern Wyoming...

* Until 400 PM MDT.

* At 301 PM MDT, a severe thunderstorm was located near Torrington,
  moving southeast at 20 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.

* This severe thunderstorm will be near...
  Huntley around 320 PM MDT.
  Lyman around 335 PM MDT.
  Morrill around 340 PM MDT.
  Mitchell and Stegall around 355 PM MDT.

Other locations impacted by this severe thunderstorm include Henry.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4208 10421 4220 10413 4208 10364 4174 10406
TIME...MOT...LOC 2101Z 319DEG 15KT 4206 10412 

HAIL...1.00IN
WIND...60MPH
 
$$

Rubin

2 follow-up statements

846 
WWUS55 KCYS 032120
SVSCYS

Severe Weather Statement
National Weather Service Cheyenne WY
320 PM MDT Sat Jul 3 2021

NEC157-165-WYC015-032200-
/O.CON.KCYS.SV.W.0072.000000T0000Z-210703T2200Z/
Scotts Bluff NE-Sioux NE-Goshen WY-
320 PM MDT Sat Jul 3 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 PM MDT
FOR NORTHWESTERN SCOTTS BLUFF...SOUTHWESTERN SIOUX AND EAST CENTRAL
GOSHEN COUNTIES...

At 320 PM MDT, a severe thunderstorm was located near Huntley, or 8
miles southeast of Torrington, moving southeast at 15 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.

This severe storm will be near...
  Morrill and Lyman around 335 PM MDT.
  Stegall around 355 PM MDT.

Other locations impacted by this severe thunderstorm include Henry.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4197 10415 4207 10410 4202 10372 4174 10406
TIME...MOT...LOC 2120Z 333DEG 15KT 4197 10410 

HAIL...1.00IN
WIND...60MPH
 
$$

Rubin

565 
WWUS55 KCYS 032131
SVSCYS

Severe Weather Statement
National Weather Service Cheyenne WY
331 PM MDT Sat Jul 3 2021

NEC157-165-WYC015-032141-
/O.CAN.KCYS.SV.W.0072.000000T0000Z-210703T2200Z/
Scotts Bluff NE-Sioux NE-Goshen WY-
331 PM MDT Sat Jul 3 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN SCOTTS BLUFF...
SOUTHWESTERN SIOUX AND EAST CENTRAL GOSHEN COUNTIES IS CANCELLED...
                
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 has been cancelled.

LAT...LON 4197 10415 4207 10410 4202 10372 4174 10406
TIME...MOT...LOC 2130Z 319DEG 15KT 4193 10406 

$$

Rubin

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 3, 3:06 PM MDT	Special Weather Statement	CYS	Box Butte	39 min
Jul 3, 3:42 PM MDT	Special Weather Statement	CYS	Kimball	48 min
Jul 3, 3:48 PM MDT	Severe Thunderstorm Warning	CYS	Kimball	31 min
Jul 3, 3:51 PM MDT	Special Weather Statement	CYS	Banner	39 min
Jul 3, 3:57 PM MDT	Special Weather Statement	CYS	Cheyenne	48 min
Jul 3, 4:18 PM MDT	Severe Thunderstorm Warning	CYS	Cheyenne	57 min
Jul 3, 4:43 PM MDT	Special Weather Statement	CYS	Cheyenne	47 min
Jul 3, 4:43 PM MDT	Severe Thunderstorm Warning	CYS	Dawes	47 min
Jul 3, 4:46 PM MDT	Severe Thunderstorm Warning	CYS	Box Butte, Dawes, Sioux	28 min
Jul 3, 5:03 PM MDT	Special Weather Statement	CYS	Morrill	42 min
Jul 3, 5:15 PM MDT	Special Weather Statement	CYS	Dawes	30 min
Jul 3, 5:21 PM MDT	Special Weather Statement	CYS	Cheyenne	39 min
Jul 3, 5:29 PM MDT	Special Weather Statement	CYS	Dawes	31 min
Jul 3, 5:40 PM MDT	Special Weather Statement	CYS	Morrill	50 min
Jul 2, 6:22 PM MDT	Special Weather Statement	CYS		38 min
Jul 2, 6:30 PM MDT	Severe Thunderstorm Warning	CYS	Niobrara	30 min
Jul 2, 6:44 PM MDT	Special Weather Statement	CYS	Platte	46 min
Jul 2, 7:00 PM MDT	Severe Thunderstorm Warning	CYS	Goshen, Niobrara, Platte	60 min
Jul 2, 7:05 PM MDT	Special Weather Statement	CYS	Niobrara	40 min
Jul 2, 7:47 PM MDT	Severe Thunderstorm Warning	CYS	Goshen	36 min
Jul 3, 12:27 PM MDT	Special Weather Statement	CYS	Platte	48 min
Jul 3, 12:35 PM MDT	Special Weather Statement	CYS	Laramie	40 min
Jul 3, 1:47 PM MDT	Special Weather Statement	CYS	Laramie	43 min
Jul 3, 2:42 PM MDT	Special Weather Statement	CYS	Goshen	48 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2021 Severe Thunderstorm Warnings in Wyoming, 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.