Alert archive / Nebraska / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 78, NWS Cheyenne, WY

July 4, 2021Scotts Bluff County, Sioux County, Nebraska; Goshen County, Wyoming

NWS Cheyenne, WY issued this severe thunderstorm warning at Jul 4, 2021, 3:22 PM MDT for Scotts Bluff County, Sioux County, Nebraska; Goshen County, Wyoming. It was in force for 38 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 4, 2021, 3:22 PM MDT (21:22 UTC)
Expired: Jul 4, 2021, 4:00 PM MDT
In force: 38 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), 112 km from the middle of the area, began a volume at 21:25 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 4, 3:26 PM MDT	HAIL 1	9 Ese Torrington, NE	REPORT CORRECTED FOR TIME.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 9.4 hours before the alert went out and 247 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: 204 J/kg
Mixed-layer CIN: -314 J/kg
Mixed-layer LCL: 2162 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 35 m²/s²
0-3 km storm-relative helicity: 80 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

872 
WUUS55 KCYS 042122
SVRCYS
NEC157-165-WYC015-042200-
/O.NEW.KCYS.SV.W.0078.210704T2122Z-210704T2200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Cheyenne WY
322 PM MDT Sun Jul 4 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...
  Central Goshen County in southeastern Wyoming...

* Until 400 PM MDT.

* At 321 PM MDT, a severe thunderstorm was located near Morrill, or 8
  miles southeast of Torrington, moving southwest 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.

* Locations impacted include...
  Torrington, Morrill, Lingle, Lyman, Huntley and Henry. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

To report severe weather, contact your nearest law enforcement
agency. They will send your report to the National Weather Service
office in Cheyenne.

&&

LAT...LON 4193 10386 4184 10416 4212 10456 4216 10394
TIME...MOT...LOC 2121Z 064DEG 12KT 4201 10403 

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

Claycomb

2 follow-up statements

598 
WWUS55 KCYS 042142
SVSCYS

Severe Weather Statement
National Weather Service Cheyenne WY
342 PM MDT Sun Jul 4 2021

NEC157-165-WYC015-042200-
/O.CON.KCYS.SV.W.0078.000000T0000Z-210704T2200Z/
Scotts Bluff NE-Sioux NE-Goshen WY-
342 PM MDT Sun Jul 4 2021

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

At 342 PM MDT, a severe thunderstorm was located near Lyman, or 8
miles southeast of Torrington, moving southwest at 10 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...
Torrington, Morrill, Lyman, Huntley and Henry. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Cheyenne.

&&

LAT...LON 4197 10388 4184 10416 4210 10433 4216 10394
TIME...MOT...LOC 2142Z 055DEG 10KT 4198 10408 

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

Claycomb

423 
WWUS55 KCYS 042150
SVSCYS

Severe Weather Statement
National Weather Service Cheyenne WY
350 PM MDT Sun Jul 4 2021

NEC157-165-WYC015-042200-
/O.EXP.KCYS.SV.W.0078.000000T0000Z-210704T2200Z/
Scotts Bluff NE-Sioux NE-Goshen WY-
350 PM MDT Sun Jul 4 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN SCOTTS BLUFF...
SOUTHWESTERN SIOUX AND EAST CENTRAL GOSHEN COUNTIES WILL EXPIRE AT
400 PM MDT...
        
The storm which prompted the warning has weakened below severe 
limits. Therefore, the warning will be allowed to expire.

LAT...LON 4197 10388 4184 10416 4210 10433 4216 10394
TIME...MOT...LOC 2150Z 064DEG 12KT 4197 10411 

$$

Claycomb

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 4, 2:06 PM MDT	Severe Thunderstorm Warning	CYS	Scotts Bluff	54 min
Jul 4, 5:30 PM MDT	Special Weather Statement	CYS	Dawes	45 min
Jul 4, 5:59 PM MDT	Special Weather Statement	CYS	Morrill	46 min
Jul 4, 12:51 PM MDT	Special Weather Statement	CYS		39 min
Jul 4, 1:06 PM MDT	Special Weather Statement	CYS	Albany	39 min
Jul 4, 2:13 PM MDT	Special Weather Statement	CYS	Goshen	47 min
Jul 4, 2:14 PM MDT	Special Weather Statement	CYS	Platte	46 min
Jul 4, 2:26 PM MDT	Special Weather Statement	CYS	Laramie	49 min
Jul 4, 4:50 PM MDT	Special Weather Statement	CYS	Albany	40 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.