Alert archive / Nebraska / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 85, NWS Cheyenne, WY

July 9, 20214 counties in Nebraska

NWS Cheyenne, WY issued this severe thunderstorm warning at Jul 9, 2021, 2:58 PM MDT for 4 counties in Nebraska. It was in force for 47 min. 2 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, 2:58 PM MDT (20:58 UTC)
Expired: Jul 9, 2021, 3:45 PM MDT
In force: 47 min
Issued by: NWS Cheyenne, WY
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

Counties Banner County, NE, Cheyenne County, NE, Kimball County, NE, Morrill County, NE

The radar

The Cheyenne radar (KCYS), 103 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 9, 3:20 PM MDT	HAIL 1	1 Ne Bushnell, NE
Jul 9, 3:29 PM MDT	HAIL 1.75	5 E Bushnell, NE	REPORTED AT OLIVER RESEVOIR EAST OF BUSHNELL. ESTIMATED TIME.

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

Denver, CO (KDNR), launched 12:00Z, 9.0 hours before the alert went out and 163 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: 5 J/kg
Mixed-layer CIN: -346 J/kg
Mixed-layer LCL: 3383 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 70 m²/s²
0-3 km storm-relative helicity: 50 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

659 
WUUS55 KCYS 092058
SVRCYS
NEC007-033-105-123-092145-
/O.NEW.KCYS.SV.W.0085.210709T2058Z-210709T2145Z/

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

The National Weather Service in Cheyenne has issued a

* Severe Thunderstorm Warning for...
  Northwestern Cheyenne County in the Panhandle of Nebraska...
  Northern Kimball County in the Panhandle of Nebraska...
  Southwestern Morrill County in the Panhandle of Nebraska...
  Southeastern Banner County in the Panhandle of Nebraska...

* Until 345 PM MDT.

* At 257 PM MDT, a severe thunderstorm was located near Kimball,
  moving east at 40 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.

* Locations impacted include...
  Kimball, Potter, Dix, Oliver Campground, Oliver Reservoir, Kimball
  Airport, Redington and Bushnell.

This includes Interstate 80 in Nebraska between mile markers 10 and
48.

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 4116 10386 4137 10395 4167 10322 4119 10306
TIME...MOT...LOC 2057Z 253DEG 35KT 4130 10373 

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

Hammer

2 follow-up statements

673 
WWUS55 KCYS 092126
SVSCYS

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

NEC007-033-105-123-092145-
/O.CON.KCYS.SV.W.0085.000000T0000Z-210709T2145Z/
Cheyenne NE-Kimball NE-Morrill NE-Banner NE-
326 PM MDT Fri Jul 9 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM MDT
FOR NORTHWESTERN CHEYENNE...NORTHERN KIMBALL...SOUTHWESTERN MORRILL
AND SOUTHEASTERN BANNER COUNTIES...

At 326 PM MDT, severe thunderstorms were located along a line
extending from near Oliver Campground to 11 miles south of Redington,
moving east at 40 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.

Locations impacted include...
Kimball, Potter, Dix, Oliver Campground, Oliver Reservoir, Kimball
Airport and Bushnell.

This includes Interstate 80 in Nebraska between mile markers 10 and
48.
 
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 4116 10386 4137 10395 4158 10326 4119 10306
TIME...MOT...LOC 2126Z 275DEG 35KT 4123 10388 4144 10337 

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

Hammer

633 
WWUS55 KCYS 092141
SVSCYS

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

NEC007-033-105-123-092150-
/O.EXP.KCYS.SV.W.0085.000000T0000Z-210709T2145Z/
Cheyenne NE-Kimball NE-Morrill NE-Banner NE-
341 PM MDT Fri Jul 9 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN CHEYENNE...
NORTHERN KIMBALL...SOUTHWESTERN MORRILL AND SOUTHEASTERN BANNER
COUNTIES WILL EXPIRE AT 345 PM MDT...
    
The storms which prompted the warning have moved out of the area.
Therefore, the warning will be allowed to expire.

A Severe Thunderstorm Warning remains in effect until 430 PM MDT for 
eastern Kimball and western Cheyenne counties. 

A Severe Thunderstorm Watch remains in effect until 900 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 4116 10386 4137 10395 4158 10326 4119 10306
TIME...MOT...LOC 2140Z 253DEG 35KT 4126 10373 4147 10322 

$$

Hammer

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 9, 2:20 PM MDT	Severe Thunderstorm Warning	CYS	Kimball	40 min
Jul 9, 2:51 PM MDT	Severe Thunderstorm Warning	CYS	Banner, Kimball	39 min
Jul 9, 3:32 PM MDT	Special Weather Statement	CYS	Sioux	28 min
Jul 9, 3:37 PM MDT	Severe Thunderstorm Warning	CYS	Cheyenne, Kimball	42 min
Jul 9, 3:54 PM MDT	Severe Thunderstorm Warning	CYS	Dawes, Sioux	36 min
Jul 9, 4:30 PM MDT	Severe Thunderstorm Warning	CYS	Box Butte, Dawes, Sioux	45 min
Jul 9, 5:08 PM MDT	Severe Thunderstorm Warning	CYS	Box Butte, Dawes	52 min
Jul 9, 5:42 PM MDT	Tornado Warning	CYS	Box Butte	33 min
Jul 9, 5:49 PM MDT	Areal Flood Advisory	CYS	Box Butte, Morrill	3 hr
Jul 9, 5:58 PM MDT	Severe Thunderstorm Warning	CYS	Box Butte, Morrill	47 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.