Alert archive / Nebraska / Tornado Warnings in 2021

Tornado Warning 1, NWS Cheyenne, WY

May 23, 2021Cheyenne County, Nebraska

NWS Cheyenne, WY issued this tornado warning at May 23, 2021, 4:31 PM MDT for Cheyenne County, Nebraska. It was in force for 44 min. 8 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: May 23, 2021, 4:31 PM MDT (22:31 UTC)
Expired: May 23, 2021, 5:15 PM MDT
In force: 44 min
Issued by: NWS Cheyenne, WY
Area: Storm-based polygon
Tornado: Radar indicated
Damage threat: Considerable
Hail: 1.5 in

County Cheyenne County, NE

The radar

The Cheyenne radar (KCYS), 177 km from the middle of the area, began a volume at 22:30 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
May 23, 4:48 PM MDT	HAIL 1.5	10 Se Sidney, NE
May 23, 4:48 PM MDT	HAIL 1.5	Sunol, NE
May 23, 4:51 PM MDT	HAIL 1	7 Sse Sidney, NE
May 23, 4:53 PM MDT	HAIL 2.5	Lodgepole, NE	SOCIAL MEDIA REPORT WITH PICTURES
May 23, 4:53 PM MDT	HAIL 2.5	Lodgepole, NE	SOCIAL MEDIA REPORT WITH PICTURES.
May 23, 4:55 PM MDT	HAIL 1.5	1 N Sunol, NE
May 23, 5:00 PM MDT	HAIL 2	8 N Lodgepole, NE
May 23, 5:04 PM MDT	HAIL 3	4 S Sunol, 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
May 23, 12:06 PM MDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 10.5 hours before the alert went out and 151 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1106 m above ground
0-6 km bulk shear: 59 kt
0-1 km storm-relative helicity: 73 m²/s²
0-3 km storm-relative helicity: 177 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

412 
WFUS55 KCYS 232231
TORCYS
NEC033-232315-
/O.NEW.KCYS.TO.W.0001.210523T2231Z-210523T2315Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Cheyenne WY
431 PM MDT Sun May 23 2021

The National Weather Service in Cheyenne has issued a

* Tornado Warning for...
  Eastern Cheyenne County in the Panhandle of Nebraska...

* Until 515 PM MDT.
    
* At 430 PM MDT, a large and extremely dangerous tornado was located
  near Crook, or 17 miles south of Sidney, moving northeast at 50
  mph.

  This is a PARTICULARLY DANGEROUS SITUATION. TAKE COVER NOW!

  HAZARD...Damaging tornado.

  SOURCE...Radar indicated rotation.

  IMPACT...You are in a life-threatening situation. Flying debris 
           may be deadly to those caught without shelter. Mobile 
           homes will be destroyed. Considerable damage to homes, 
           businesses, and vehicles is likely and complete 
           destruction is possible.

* Locations impacted include...
  Sunol and Lodgepole.

This includes Interstate 80 in Nebraska between mile markers 64 and
77.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

To repeat, a large, extremely dangerous and potentially deadly
tornado is developing. To protect your life, TAKE COVER NOW! Move to
a basement or an interior room on the lowest floor of a sturdy
building. Avoid windows. If you are outdoors, in a mobile home, or in
a vehicle, move to the closest substantial shelter and protect
yourself from flying debris.

Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!

&&

LAT...LON 4100 10262 4100 10296 4142 10266 4139 10261
TIME...MOT...LOC 2230Z 208DEG 42KT 4089 10291 

TORNADO...RADAR INDICATED
TORNADO DAMAGE THREAT...CONSIDERABLE
HAIL...1.50IN

$$

Cox

4 follow-up statements

803 
WWUS55 KCYS 232242
SVSCYS

Severe Weather Statement
National Weather Service Cheyenne WY
442 PM MDT Sun May 23 2021

NEC033-232315-
/O.CON.KCYS.TO.W.0001.000000T0000Z-210523T2315Z/
Cheyenne NE-
442 PM MDT Sun May 23 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 515 PM MDT FOR EASTERN
CHEYENNE COUNTY...
    
At 441 PM MDT, a large and extremely dangerous tornado was located 8
miles north of Twin Buttes, or 11 miles southeast of Sidney, moving
northeast at 55 mph.

This is a PARTICULARLY DANGEROUS SITUATION. TAKE COVER NOW!

HAZARD...Damaging tornado.

SOURCE...Radar indicated rotation.

IMPACT...You are in a life-threatening situation. Flying debris may 
         be deadly to those caught without shelter. Mobile homes 
         will be destroyed. Considerable damage to homes, 
         businesses, and vehicles is likely and complete destruction 
         is possible.

Locations impacted include...
Lodgepole and Sunol. 

This includes Interstate 80 in Nebraska between mile markers 64 and
77.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

To repeat, a large, extremely dangerous and potentially deadly
tornado is developing. To protect your life, TAKE COVER NOW! Move to
a basement or an interior room on the lowest floor of a sturdy
building. Avoid windows. If you are outdoors, in a mobile home, or in
a vehicle, move to the closest substantial shelter and protect
yourself from flying debris.

Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!

&&

LAT...LON 4100 10262 4100 10296 4142 10266 4139 10261
TIME...MOT...LOC 2241Z 209DEG 48KT 4103 10280 

TORNADO...RADAR INDICATED
TORNADO DAMAGE THREAT...CONSIDERABLE
HAIL...1.50IN

$$

Cox

000 
WWUS55 KCYS 232254
SVSCYS

Severe Weather Statement
National Weather Service Cheyenne WY
454 PM MDT Sun May 23 2021

NEC033-232315-
/O.CON.KCYS.TO.W.0001.000000T0000Z-210523T2315Z/
Cheyenne NE-
454 PM MDT Sun May 23 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 515 PM MDT FOR
NORTHEASTERN CHEYENNE COUNTY...
    
At 453 PM MDT, a large and extremely dangerous tornado was located
over Sunol, or 12 miles east of Sidney, moving northeast at 45 mph.

This is a PARTICULARLY DANGEROUS SITUATION. TAKE COVER NOW!

HAZARD...Damaging tornado.

SOURCE...Radar indicated rotation.

IMPACT...You are in a life-threatening situation. Flying debris may 
         be deadly to those caught without shelter. Mobile homes 
         will be destroyed. Considerable damage to homes, 
         businesses, and vehicles is likely and complete destruction 
         is possible.

Locations impacted include...
Lodgepole and Sunol. 

This includes Interstate 80 in Nebraska between mile markers 64 and
77.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

To repeat, a large, extremely dangerous and potentially deadly
tornado is developing. To protect your life, TAKE COVER NOW! Move to
a basement or an interior room on the lowest floor of a sturdy
building. Avoid windows. If you are outdoors, in a mobile home, or in
a vehicle, move to the closest substantial shelter and protect
yourself from flying debris.

Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!

&&

LAT...LON 4109 10262 4110 10289 4142 10266 4139 10261
TIME...MOT...LOC 2253Z 208DEG 41KT 4114 10272 

TORNADO...RADAR INDICATED
TORNADO DAMAGE THREAT...CONSIDERABLE
HAIL...1.50IN

$$

Cox

931 
WWUS55 KCYS 232304
SVSCYS

Severe Weather Statement
National Weather Service Cheyenne WY
504 PM MDT Sun May 23 2021

NEC033-232315-
/O.CON.KCYS.TO.W.0001.000000T0000Z-210523T2315Z/
Cheyenne NE-
504 PM MDT Sun May 23 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 515 PM MDT FOR
NORTHEASTERN CHEYENNE COUNTY...
    
At 504 PM MDT, a severe thunderstorm capable of producing a tornado
was located 8 miles north of Lodgepole, or 15 miles northwest of
Chappell, moving northeast at 50 mph.

HAZARD...Tornado and half dollar size hail.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

Locations impacted include...
Lodgepole and Sunol. 

This includes Interstate 80 in Nebraska between mile markers 64 and
77.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!

&&

LAT...LON 4109 10262 4110 10289 4142 10266 4139 10261
TIME...MOT...LOC 2304Z 207DEG 44KT 4128 10263 

TORNADO...RADAR INDICATED
HAIL...1.25IN

$$

Cox

903 
WWUS55 KCYS 232310
SVSCYS

Severe Weather Statement
National Weather Service Cheyenne WY
510 PM MDT Sun May 23 2021

NEC033-232320-
/O.EXP.KCYS.TO.W.0001.000000T0000Z-210523T2315Z/
Cheyenne NE-
510 PM MDT Sun May 23 2021

...THE TORNADO WARNING FOR NORTHEASTERN CHEYENNE COUNTY WILL EXPIRE
AT 515 PM MDT...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.  However gusty
winds and heavy rain are still possible with this thunderstorm.

A Tornado Watch remains in effect until 800 PM MDT for the Panhandle
of Nebraska.

LAT...LON 4109 10262 4110 10289 4142 10266 4139 10261
TIME...MOT...LOC 2310Z 208DEG 42KT 4132 10260 

$$

Cox

The office that day

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

Issued	Product	Office	Counties	Lasted
May 23, 2:38 PM MDT	Severe Thunderstorm Warning	CYS	Scotts Bluff, Sioux	24 min
May 23, 3:45 PM MDT	Special Weather Statement	CYS	Dawes	45 min
May 23, 3:53 PM MDT	Special Weather Statement	CYS	Morrill	52 min
May 23, 4:22 PM MDT	Severe Thunderstorm Warning	CYS	Cheyenne	38 min

Nearby

Tornado Warnings in Nebraska, 2021 Every tornado warning in 2021 Tornadoes 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.