Alert archive / Nebraska / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 20, NWS North Platte, NE

May 23, 20214 counties in Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at May 23, 2021, 5:48 PM MDT for 4 counties in Nebraska. It was in force for 42 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: May 23, 2021, 5:48 PM MDT (23:48 UTC)
Expired: May 23, 2021, 6:30 PM MDT
In force: 42 min
Issued by: NWS North Platte, NE
Area: Storm-based polygon
Tornado: Possible
Hail: 2.0 in
Wind: 70.0 mph

Counties Cherry County, NE, Garden County, NE, Grant County, NE, Sheridan County, NE

The radar

The North Platte radar (KLNX), 125 km from the middle of the area, began a volume at 23:48 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
May 23, 5:53 PM MDT	HAIL 1	14 Wnw Jensen Lake, NE
May 23, 6:02 PM MDT	HAIL 1.75	5 Sw Bingham, NE
May 23, 6:26 PM MDT	HAIL 1	14 N Ashby, 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

N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 11.8 hours before the alert went out and 152 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: 962 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 610 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 125 m²/s²
0-3 km storm-relative helicity: 136 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 2.5

Open this sounding in Storm Lab

The text

As transmitted.

673 
WUUS53 KLBF 232348
SVRLBF
NEC031-069-075-161-240030-
/O.NEW.KLBF.SV.W.0020.210523T2348Z-210524T0030Z/

BULLETIN - EAS ACTIVATION REQUESTED
Severe Thunderstorm Warning
National Weather Service North Platte NE
548 PM MDT Sun May 23 2021

The National Weather Service in North Platte has issued a

* Severe Thunderstorm Warning for...
  Southwestern Cherry County in north central Nebraska...
  Western Grant County in west central Nebraska...
  Northeastern Garden County in the Panhandle of Nebraska...
  Southeastern Sheridan County in the Panhandle of Nebraska...

* Until 630 PM MDT.

* At 547 PM MDT, a severe thunderstorm was located 9 miles east of
  Crescent Lake National Wildlife Refuge, or 26 miles north of
  Oshkosh, moving northeast at 50 mph.

  HAZARD...Two inch hail and 70 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...People and animals outdoors will be injured. Expect hail 
           damage to roofs, siding, windows, and vehicles. Expect 
           considerable tree damage. Wind damage is also likely to 
           mobile homes, roofs, and outbuildings.

* Locations impacted include...
  Ellsworth, Hyannis, Ashby, Watson Lake, Dipping Vat Meadow, 
  Finnegan Lake, Swede Lake, Deer Lake, Britton Lake, and Argo Hill.

This includes the following highways...
 Highway 2 between mile markers 115 and 146.
 Highway 61 between mile markers 159 and 175.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This storm is producing large hail. SEEK SHELTER NOW inside a sturdy
structure and stay away from windows!

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

&&

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

LAT...LON 4166 10210 4177 10245 4238 10222 4218 10156
TIME...MOT...LOC 2347Z 207DEG 44KT 4178 10224 

TORNADO...POSSIBLE
HAIL...2.00IN
WIND...70MPH
 
$$

Jacobs

1 follow-up statement

752 
WWUS53 KLBF 240012
SVSLBF

Severe Weather Statement
National Weather Service North Platte NE
612 PM MDT Sun May 23 2021

NEC031-069-075-161-240030-
/O.CON.KLBF.SV.W.0020.000000T0000Z-210524T0030Z/
Cherry NE-Grant NE-Garden NE-Sheridan NE-
612 PM MDT Sun May 23 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM MDT
FOR SOUTHWESTERN CHERRY...NORTHWESTERN GRANT...NORTHEASTERN GARDEN
AND SOUTHEASTERN SHERIDAN COUNTIES...

At 611 PM MDT, a severe thunderstorm was located near Ashby, or 37
miles northwest of Arthur, moving northeast at 50 mph.

HAZARD...Golf ball size hail.

SOURCE...Trained weather spotters. At 706 PM CDT Golfball size hail 
         was reported 4 miles south southwest of Bingham.

IMPACT...People and animals outdoors will be injured. Expect damage 
         to roofs, siding, windows, and vehicles.

Locations impacted include...
Ellsworth, Hyannis, Ashby, Watson Lake, Dipping Vat Meadow, Finnegan
Lake, Swede Lake, Kincaid Lake, Kennedy Lake, Wild Horse Flats,
Mother Lake, Bingham, Wolf Hill, Dominick Lake, Jerry Lake and Argo
Hill.

This includes the following highways...
 Highway 2 between mile markers 115 and 145.
 Highway 61 between mile markers 159 and 175.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4174 10207 4199 10237 4238 10222 4218 10156
TIME...MOT...LOC 0011Z 207DEG 44KT 4204 10206 

TORNADO...POSSIBLE
HAIL...1.75IN
WIND...<50MPH
 
$$

Jacobs

The office that day

Everything else NWS North Platte, NE issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 22, 8:17 PM MDT	Special Weather Statement	LBF	Chase	43 min
May 22, 8:21 PM MDT	Special Weather Statement	LBF	Lincoln	39 min
May 22, 8:49 PM MDT	Special Weather Statement	LBF	Perkins	41 min
May 22, 9:07 PM MDT	Special Weather Statement	LBF	Lincoln	23 min
May 22, 9:34 PM MDT	Special Weather Statement	LBF	Chase, Keith, Perkins	26 min
May 22, 10:00 PM MDT	Special Weather Statement	LBF	Chase, Keith, Perkins	45 min
May 22, 10:21 PM MDT	Areal Flood Advisory	LBF	Keith, Perkins	3 hr
May 22, 11:47 PM MDT	Special Weather Statement	LBF	Hooker, McPherson	58 min
May 23, 1:34 PM MDT	Special Weather Statement	LBF	Dawes	41 min
May 23, 1:57 PM MDT	Special Weather Statement	LBF	Garden	33 min
May 23, 2:26 PM MDT	Special Weather Statement	LBF	Sheridan	34 min
May 23, 3:00 PM MDT	Special Weather Statement	LBF	Sheridan	45 min
May 23, 4:33 PM MDT	Tornado Warning	LBF	Deuel, Garden	42 min
May 23, 4:37 PM MDT	Special Weather Statement	LBF	Sheridan	38 min
May 23, 5:09 PM MDT	Severe Thunderstorm Warning	LBF	Deuel, Garden, Grant	51 min
May 23, 5:16 PM MDT	Special Weather Statement	LBF	Sheridan	44 min
May 23, 5:38 PM MDT	Special Weather Statement	LBF	Deuel	52 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.