Alert archive / Nebraska / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 53, NWS Cheyenne, WY

June 13, 2021Scotts Bluff County, Sioux County, Nebraska

NWS Cheyenne, WY issued this severe thunderstorm warning at Jun 13, 2021, 5:58 PM MDT for Scotts Bluff County, Sioux County, Nebraska. It was in force for 47 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: Jun 13, 2021, 5:58 PM MDT (23:58 UTC)
Expired: Jun 13, 2021, 6:45 PM MDT
In force: 47 min
Issued by: NWS Cheyenne, WY
Area: Storm-based polygon
Hail: 1.5 in
Wind: 60.0 mph

Counties Scotts Bluff County, NE, Sioux County, NE

The radar

The Cheyenne radar (KCYS), 140 km from the middle of the area, began a volume at 00:03 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
Jun 13, 6:08 PM MDT	HAIL 0.88	Scottsbluff, NE	REPORT RELAYED VIA TWITTER.
Jun 13, 6:20 PM MDT	TSTM WND DMG	2 Nne Scottsbluff, NE	SEVERAL TREE BRANCHES DOWN, LARGEST BRANCH DOWN WAS 9-10 INCH IN DIAMETER.
Jun 13, 6:20 PM MDT	TSTM WND GST 70	2 Nne Scottsbluff, 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
Jun 13, 3:04 PM MDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 12.0 hours before the alert went out and 237 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: 827 J/kg
Mixed-layer CIN: -387 J/kg
Mixed-layer LCL: 1858 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: 19 m²/s²
0-3 km storm-relative helicity: 10 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

720 
WUUS55 KCYS 132358
SVRCYS
NEC157-165-140045-
/O.NEW.KCYS.SV.W.0053.210613T2358Z-210614T0045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Cheyenne WY
558 PM MDT Sun Jun 13 2021

The National Weather Service in Cheyenne has issued a

* Severe Thunderstorm Warning for...
  Scotts Bluff County in the Panhandle of Nebraska...
  Southeastern Sioux County in the Panhandle of Nebraska...

* Until 645 PM MDT.

* At 558 PM MDT, a severe thunderstorm was located near Scotts Bluff
  National Monument, or near Scottsbluff, moving east at 15 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...
  Scottsbluff, Gering, Mitchell, Terrytown, Morrill, Lake Minatare
  Campground, Hubbard Hill, Flahertys Corner, Scottsbluff Airport,
  Lake Minatare, Lake Alice and Scotts Bluff National Monument.

This replaces the Severe Thunderstorm Warning which was previously 
in effect for the warned area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for large hail and damaging winds. People outside
should move immediately to shelter inside a strong building. Stay
away from windows.

&&

LAT...LON 4177 10386 4199 10394 4234 10344 4209 10345
      4209 10340 4201 10340 4200 10337 4198 10336
      4185 10336
TIME...MOT...LOC 2358Z 248DEG 13KT 4188 10374 

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

Hammer

3 follow-up statements

744 
WWUS55 KCYS 140014
SVSCYS

Severe Weather Statement
National Weather Service Cheyenne WY
614 PM MDT Sun Jun 13 2021

NEC157-165-140045-
/O.CON.KCYS.SV.W.0053.000000T0000Z-210614T0045Z/
Scotts Bluff NE-Sioux NE-
614 PM MDT Sun Jun 13 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM MDT
FOR NORTHEASTERN SCOTTS BLUFF AND SOUTHEASTERN SIOUX COUNTIES...

At 614 PM MDT, a severe thunderstorm was located near Scottsbluff
Airport, or near Scottsbluff, moving east at 15 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...
Scottsbluff, Gering, Terrytown, Lake Minatare Campground, Flahertys
Corner, Scottsbluff Airport, Lake Minatare and Lake Alice.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for large hail and damaging winds. People outside
should move to a shelter, inside a strong building and away from
windows.

&&

LAT...LON 4183 10368 4206 10384 4234 10344 4209 10345
      4209 10340 4201 10340 4200 10337 4198 10336
      4185 10336
TIME...MOT...LOC 0014Z 247DEG 14KT 4192 10362 

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

Hammer

328 
WWUS55 KCYS 140026
SVSCYS

Severe Weather Statement
National Weather Service Cheyenne WY
626 PM MDT Sun Jun 13 2021

NEC157-165-140045-
/O.CON.KCYS.SV.W.0053.000000T0000Z-210614T0045Z/
Scotts Bluff NE-Sioux NE-
626 PM MDT Sun Jun 13 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM MDT
FOR NORTHEASTERN SCOTTS BLUFF AND SOUTHEASTERN SIOUX COUNTIES...

At 623 PM MDT, severe thunderstorms were located along a line
extending from 11 miles northwest of Lake Alice to near Lake Minatare
Campground, moving northeast at 15 mph.

HAZARD...70 mph wind gusts and quarter size hail. 

SOURCE...Trained weather spotters. Tree damage was reported 2 miles 
         northeast of Scottsbluff with these storms.

IMPACT...Hail damage to vehicles is expected. Expect considerable 
         tree damage. Wind damage is also likely to mobile homes, 
         roofs, and outbuildings.

Locations impacted include...
Scottsbluff, Gering, Lake Minatare Campground, Flahertys Corner,
Scottsbluff Airport, Lake Minatare and Lake Alice.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for large hail and damaging winds. People outside
should move to a shelter, inside a strong building and away from
windows.

&&

LAT...LON 4183 10365 4209 10380 4234 10344 4209 10345
      4209 10340 4201 10340 4200 10337 4198 10336
      4185 10336
TIME...MOT...LOC 0023Z 211DEG 14KT 4215 10371 4189 10347 

HAIL...1.00IN
WIND...70MPH
 
$$

Hammer

313 
WWUS55 KCYS 140043
SVSCYS

Severe Weather Statement
National Weather Service Cheyenne WY
643 PM MDT Sun Jun 13 2021

NEC157-165-140053-
/O.EXP.KCYS.SV.W.0053.000000T0000Z-210614T0045Z/
Scotts Bluff NE-Sioux NE-
643 PM MDT Sun Jun 13 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN SCOTTS BLUFF AND
SOUTHEASTERN SIOUX COUNTIES WILL EXPIRE AT 645 PM MDT...
            
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning will be allowed to expire.

A Severe Thunderstorm Watch remains in effect until 1000 PM MDT for
the Panhandle of Nebraska.

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

LAT...LON 4183 10365 4209 10380 4234 10344 4209 10345
      4209 10340 4201 10340 4200 10337 4198 10336
      4185 10336
TIME...MOT...LOC 0043Z 248DEG 13KT 4217 10364 4191 10340 

$$

Hammer

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 13, 5:13 PM MDT	Severe Thunderstorm Warning	CYS	Scotts Bluff, Sioux	47 min
Jun 13, 5:31 PM MDT	Special Weather Statement	CYS	Dawes	44 min
Jun 13, 5:50 PM MDT	Severe Thunderstorm Warning	CYS	Box Butte, Dawes, Sioux	55 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.