Alert archive / Nebraska / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 58, NWS Cheyenne, WY

June 13, 2021Morrill County, Nebraska

NWS Cheyenne, WY issued this severe thunderstorm warning at Jun 13, 2021, 8:52 PM MDT for Morrill County, Nebraska. It was in force for 53 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 13, 2021, 8:52 PM MDT (02:52 UTC)
Expired: Jun 13, 2021, 9:45 PM MDT
In force: 53 min
Issued by: NWS Cheyenne, WY
Area: Storm-based polygon
Hail: 1.75 in
Wind: 60.0 mph

County Morrill County, NE

The radar

The Cheyenne radar (KCYS), 163 km from the middle of the area, began a volume at 02:54 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 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 00:00Z, 2.9 hours before the alert went out and 200 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: 1095 J/kg
Mixed-layer CIN: -143 J/kg
Mixed-layer LCL: 2628 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: -5 m²/s²
0-3 km storm-relative helicity: 22 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

As transmitted.

554 
WUUS55 KCYS 140252
SVRCYS
NEC123-140345-
/O.NEW.KCYS.SV.W.0058.210614T0252Z-210614T0345Z/

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

The National Weather Service in Cheyenne has issued a

* Severe Thunderstorm Warning for...
  Central Morrill County in the Panhandle of Nebraska...

* Until 945 PM MDT.

* At 852 PM MDT, a severe thunderstorm was located near Northport, or
  25 miles south of Alliance, moving southeast at 10 mph.

  HAZARD...Golf 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...
  Bridgeport, Bridgeport State Recreation Area, Northport, The
  Intersection Of Highway 385 And 92 and Broadwater.

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 4171 10318 4187 10304 4171 10265 4151 10276
      4146 10301
TIME...MOT...LOC 0252Z 303DEG 11KT 4176 10303 

HAIL...1.75IN
WIND...60MPH
 
$$

Hammer

3 follow-up statements

931 
WWUS55 KCYS 140307
SVSCYS

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

NEC123-140345-
/O.CON.KCYS.SV.W.0058.000000T0000Z-210614T0345Z/
Morrill NE-
907 PM MDT Sun Jun 13 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 PM MDT
FOR SOUTHEASTERN MORRILL COUNTY...

At 907 PM MDT, a severe thunderstorm was located near Northport, or
25 miles south of Alliance, moving southeast at 15 mph.

HAZARD...Golf 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...
The Intersection Of Highway 385 And 92 and Broadwater. 

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 4187 10304 4171 10265 4151 10276 4152 10295
      4176 10314
TIME...MOT...LOC 0307Z 303DEG 11KT 4173 10298 

HAIL...1.75IN
WIND...60MPH
 
$$

Hammer

302 
WWUS55 KCYS 140323
SVSCYS

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

NEC123-140345-
/O.CON.KCYS.SV.W.0058.000000T0000Z-210614T0345Z/
Morrill NE-
923 PM MDT Sun Jun 13 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 PM MDT
FOR CENTRAL MORRILL COUNTY...

At 923 PM MDT, a severe thunderstorm was located 7 miles northeast of
Northport, or 25 miles south of Alliance, moving east at 10 mph.

HAZARD...Golf 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.

This severe thunderstorm will remain over mainly rural areas of
central Morrill County.

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 4185 10300 4175 10275 4161 10286 4175 10309
TIME...MOT...LOC 0323Z 284DEG 10KT 4174 10296 

HAIL...1.75IN
WIND...60MPH
 
$$

Hammer

040 
WWUS55 KCYS 140342
SVSCYS

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

NEC123-140351-
/O.EXP.KCYS.SV.W.0058.000000T0000Z-210614T0345Z/
Morrill NE-
942 PM MDT Sun Jun 13 2021

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL MORRILL COUNTY WILL
EXPIRE AT 945 PM MDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.  However small hail
and gusty winds are still possible with this thunderstorm.

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

LAT...LON 4185 10300 4175 10275 4161 10286 4175 10309
TIME...MOT...LOC 0341Z 303DEG 11KT 4172 10291 

$$

Hammer

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 13, 6:42 PM MDT	Severe Thunderstorm Warning	CYS	Box Butte, Dawes, Sioux	48 min
Jun 13, 7:27 PM MDT	Severe Thunderstorm Warning	CYS	Box Butte, Dawes, Sioux	48 min
Jun 13, 7:32 PM MDT	Severe Thunderstorm Warning	CYS	Dawes	43 min
Jun 13, 7:38 PM MDT	Severe Thunderstorm Warning	CYS	Box Butte, Cheyenne, Morrill	52 min
Jun 13, 9:43 PM MDT	Special Weather Statement	CYS	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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.