Alert archive / Nebraska / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 62, NWS Cheyenne, WY

June 18, 2021Laramie County, Wyoming; Banner County, Kimball County, Nebraska

NWS Cheyenne, WY issued this severe thunderstorm warning at Jun 18, 2021, 8:13 PM MDT for Laramie County, Wyoming; Banner County, Kimball County, Nebraska. It was in force for 47 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 18, 2021, 8:13 PM MDT (02:13 UTC)
Expired: Jun 18, 2021, 9:00 PM MDT
In force: 47 min
Issued by: NWS Cheyenne, WY
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Banner County, NE, Kimball County, NE, Laramie County, WY

The radar

The Cheyenne radar (KCYS), 59 km from the middle of the area, began a volume at 02:15 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 nearest sounding before it

Denver, CO (KDNR), launched 00:00Z, 2.2 hours before the alert went out and 179 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: 580 J/kg
Mixed-layer CIN: -27 J/kg
Mixed-layer LCL: 2917 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 35 m²/s²
0-3 km storm-relative helicity: 78 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

Open this sounding in Storm Lab

The text

As transmitted.

404 
WUUS55 KCYS 190213
SVRCYS
NEC007-105-WYC021-190300-
/O.NEW.KCYS.SV.W.0062.210619T0213Z-210619T0300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Cheyenne WY
813 PM MDT Fri Jun 18 2021

The National Weather Service in Cheyenne has issued a

* Severe Thunderstorm Warning for...
  Northwestern Kimball County in the Panhandle of Nebraska...
  Southwestern Banner County in the Panhandle of Nebraska...
  East central Laramie County in southeastern Wyoming...

* Until 900 PM MDT.

* At 813 PM MDT, a severe thunderstorm was located 8 miles southwest
  of Albin, or 30 miles west of Kimball, moving east 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.

* Locations impacted include...
  Albin.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4126 10427 4141 10433 4147 10395 4123 10390
TIME...MOT...LOC 0213Z 260DEG 18KT 4134 10422 

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

Cox

3 follow-up statements

182 
WWUS55 KCYS 190230
SVSCYS

Severe Weather Statement
National Weather Service Cheyenne WY
830 PM MDT Fri Jun 18 2021

NEC007-105-WYC021-190300-
/O.CON.KCYS.SV.W.0062.000000T0000Z-210619T0300Z/
Kimball NE-Banner NE-Laramie WY-
830 PM MDT Fri Jun 18 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM MDT
FOR NORTHWESTERN KIMBALL...SOUTHWESTERN BANNER AND EAST CENTRAL
LARAMIE COUNTIES...

At 830 PM MDT, a severe thunderstorm was located near Albin, or 23
miles west of Kimball, moving east at 25 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...
Albin.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4125 10418 4142 10423 4147 10395 4123 10390
TIME...MOT...LOC 0230Z 259DEG 20KT 4136 10408 

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

Cox

359 
WWUS55 KCYS 190243
SVSCYS

Severe Weather Statement
National Weather Service Cheyenne WY
843 PM MDT Fri Jun 18 2021

NEC007-105-WYC021-190300-
/O.CON.KCYS.SV.W.0062.000000T0000Z-210619T0300Z/
Kimball NE-Banner NE-Laramie WY-
843 PM MDT Fri Jun 18 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM MDT
FOR NORTHWESTERN KIMBALL...SOUTHWESTERN BANNER AND EAST CENTRAL
LARAMIE COUNTIES...

At 843 PM MDT, a severe thunderstorm was located near Albin, or 21
miles northwest of Kimball, moving east 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 remain over mainly rural areas of
northwestern Kimball, southwestern Banner and east central Laramie
Counties.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4125 10404 4144 10406 4147 10395 4125 10391
TIME...MOT...LOC 0243Z 260DEG 18KT 4137 10402 

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

Cox

732 
WWUS55 KCYS 190254
SVSCYS

Severe Weather Statement
National Weather Service Cheyenne WY
854 PM MDT Fri Jun 18 2021

NEC007-105-WYC021-190304-
/O.EXP.KCYS.SV.W.0062.000000T0000Z-210619T0300Z/
Kimball NE-Banner NE-Laramie WY-
854 PM MDT Fri Jun 18 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN KIMBALL...
SOUTHWESTERN BANNER AND EAST CENTRAL LARAMIE COUNTIES WILL EXPIRE AT
900 PM MDT...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire.

LAT...LON 4125 10404 4144 10406 4147 10395 4125 10391
TIME...MOT...LOC 0254Z 260DEG 18KT 4138 10397 

$$

Cox

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 18, 7:18 PM MDT	Red Flag Warning	CYS		25 hr
Jun 18, 7:21 PM MDT	Special Weather Statement	CYS	Laramie	39 min
Jun 18, 7:35 PM MDT	Severe Thunderstorm Warning	CYS	Laramie	40 min
Jun 18, 7:54 PM MDT	Severe Thunderstorm Warning	CYS	Laramie	51 min
Jun 18, 8:29 PM MDT	Severe Thunderstorm Warning	CYS	Laramie	46 min
Jun 18, 8:30 PM MDT	Special Weather Statement	CYS	Laramie	45 min
Jun 19, 12:54 PM MDT	Fire Weather Watch	CYS		7 hr
Jun 19, 1:18 PM MDT	Special Weather Statement	CYS	Laramie	42 min
Jun 19, 1:51 PM MDT	Special Weather Statement	CYS	Laramie	24 min
Jun 19, 1:41 PM MDT	Special Weather Statement	CYS	Banner	49 min
Jun 19, 2:04 PM MDT	Severe Thunderstorm Warning	CYS	Banner, Morrill, Scotts Bluff	41 min
Jun 19, 2:23 PM MDT	Special Weather Statement	CYS	Kimball	52 min
Jun 19, 2:38 PM MDT	Special Weather Statement	CYS	Box Butte	52 min
Jun 19, 2:42 PM MDT	Severe Thunderstorm Warning	CYS	Banner, Cheyenne, Kimball, Morrill	36 min
Jun 19, 2:46 PM MDT	Severe Thunderstorm Warning	CYS	Box Butte, Morrill	17 min
Jun 19, 2:53 PM MDT	Special Weather Statement	CYS	Morrill	37 min
Jun 19, 3:20 PM MDT	Special Weather Statement	CYS	Cheyenne	55 min
Jun 19, 3:31 PM MDT	Severe Thunderstorm Warning	CYS	Cheyenne	59 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.