Alert archive / Nebraska / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 144, NWS North Platte, NE

August 19, 20215 counties in Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Aug 19, 2021, 8:40 PM MDT for 5 counties in Nebraska. It was in force for 50 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: Aug 19, 2021, 8:40 PM MDT (02:40 UTC)
Expired: Aug 19, 2021, 9:30 PM MDT
In force: 50 min
Issued by: NWS North Platte, NE
Area: Storm-based polygon
Damage threat: Considerable
Hail: 0.75 in
Wind: 70.0 mph

Counties Chase County, NE, Frontier County, NE, Hayes County, NE, Lincoln County, NE, Perkins County, NE

The radar

The North Platte radar (KLNX), 151 km from the middle of the area, began a volume at 02:42 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
Aug 19, 5:25 PM MDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 2.7 hours before the alert went out and 67 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: 1368 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 1220 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 145 m²/s²
0-3 km storm-relative helicity: 208 m²/s²
Significant tornado parameter: 1.1
Supercell composite: 10.2

Open this sounding in Storm Lab

The text

As transmitted.

245 
WUUS53 KLBF 200240
SVRLBF
NEC029-063-085-111-135-200330-
/O.NEW.KLBF.SV.W.0144.210820T0240Z-210820T0330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service North Platte NE
940 PM CDT Thu Aug 19 2021

The National Weather Service in North Platte has issued a

* Severe Thunderstorm Warning for...
  Western Frontier County in southwestern Nebraska...
  Southeastern Perkins County in southwestern Nebraska...
  Southeastern Chase County in southwestern Nebraska...
  Southern Lincoln County in southwestern Nebraska...
  Hayes County in southwestern Nebraska...

* Until 1030 PM CDT/930 PM MDT/.

* At 939 PM CDT/839 PM MDT/, severe thunderstorms were located along
  a line extending from 9 miles south of Sutherland Reservoir State 
  Recreation Area to Wallace to near Wauneta, moving east at 40 mph.

  HAZARD...70 mph wind gusts and penny size hail.

  SOURCE...Radar indicated.

  IMPACT...Expect considerable tree damage. Damage is likely to 
           mobile homes, roofs, and outbuildings.

* Locations impacted include...
  Hayes Center, Wauneta, Wallace, Wellfleet, Dickens, Maywood,
  Hamlet, Quick, Cottonwood Canyon State Wildlife Management Area,
  Hansen Memorial Reserve State Wildlife Management Area, Hayes
  Center State Wildlife Management Area, Marengo, Bluegill Haven
  Campground and Somerset.

This includes Highway 83 between mile markers 32 and 76.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until midnight CDT/1100 PM MDT/ for
southwestern Nebraska.

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

&&

LAT...LON 4036 10151 4072 10131 4073 10130 4080 10128
      4107 10121 4101 10042 4051 10056 4035 10071
TIME...MOT...LOC 0239Z 282DEG 34KT 4098 10108 4072 10116 4038 10139 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...OBSERVED
MAX WIND GUST...70 MPH

$$

Taylor

2 follow-up statements

495 
WWUS53 KLBF 200311
SVSLBF

Severe Weather Statement
National Weather Service North Platte NE
1011 PM CDT Thu Aug 19 2021

NEC029-063-085-111-135-200330-
/O.CON.KLBF.SV.W.0144.000000T0000Z-210820T0330Z/
Frontier NE-Perkins NE-Chase NE-Lincoln NE-Hayes NE-
1011 PM CDT Thu Aug 19 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1030 PM
CDT/930 PM MDT/ FOR WESTERN FRONTIER...SOUTHEASTERN PERKINS...
SOUTHEASTERN CHASE...SOUTHERN LINCOLN AND HAYES COUNTIES...

At 1011 PM CDT/911 PM MDT/, severe thunderstorms were located along a
line extending from near Lake Maloney State Recreation Area to 6
miles southwest of Wellfleet to near Palisade, moving east at 35 mph.

HAZARD...70 mph wind gusts and penny size hail.

SOURCE...Radar indicated.

IMPACT...Expect considerable tree damage. Damage is likely to mobile 
         homes, roofs, and outbuildings.

Locations impacted include...
Hayes Center, Wauneta, Wallace, Wellfleet, Dickens, Maywood, Hamlet,
Quick, Cottonwood Canyon State Wildlife Management Area, Hansen
Memorial Reserve State Wildlife Management Area, Hayes Center State
Wildlife Management Area, Marengo, Bluegill Haven Campground and
Somerset.

This includes Highway 83 between mile markers 32 and 76.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until midnight CDT/1100 PM MDT/ for
southwestern Nebraska.

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

&&

LAT...LON 4036 10151 4072 10131 4073 10130 4080 10128
      4107 10121 4101 10042 4051 10056 4035 10071
TIME...MOT...LOC 0311Z 273DEG 30KT 4096 10075 4070 10083 4043 10113 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...OBSERVED
MAX WIND GUST...70 MPH

$$

Taylor

660 
WWUS53 KLBF 200331
SVSLBF

Severe Weather Statement
National Weather Service North Platte NE
1031 PM CDT Thu Aug 19 2021

NEC029-063-085-111-135-200340-
/O.EXP.KLBF.SV.W.0144.000000T0000Z-210820T0330Z/
Frontier NE-Perkins NE-Chase NE-Lincoln NE-Hayes NE-
1031 PM CDT Thu Aug 19 2021

...THE SEVERE THUNDERSTORM WARNING FOR WESTERN FRONTIER...
SOUTHEASTERN PERKINS...SOUTHEASTERN CHASE...SOUTHERN LINCOLN AND
HAYES COUNTIES HAS EXPIRED...
            
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning has been allowed to expire.  However small
hail, gusty winds and heavy rain are still possible with these
thunderstorms.

A Tornado Watch remains in effect until midnight CDT/1100 PM MDT/ for
southwestern Nebraska.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
North Platte.

LAT...LON 4036 10151 4072 10131 4073 10130 4080 10128
      4107 10121 4101 10042 4051 10056 4035 10071
TIME...MOT...LOC 0330Z 282DEG 34KT 4092 10053 4066 10061 4040 10091 

$$

Taylor

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 19, 6:02 PM MDT	Severe Thunderstorm Warning Considerable damage threat	LBF	Chase, Perkins	43 min
Aug 19, 6:13 PM MDT	Flash Flood Warning	LBF	Keith	3 hr
Aug 19, 6:32 PM MDT	Severe Thunderstorm Warning	LBF	Chase, Perkins	43 min
Aug 19, 6:42 PM MDT	Severe Thunderstorm Warning	LBF	Chase, Perkins	48 min
Aug 19, 6:50 PM MDT	Areal Flood Advisory	LBF	Arthur	2 hr
Aug 19, 6:59 PM MDT	Areal Flood Advisory	LBF	Chase, Perkins	2 hr
Aug 19, 7:13 PM MDT	Areal Flood Warning	LBF	Chase, Perkins	24 hr
Aug 19, 7:39 PM MDT	Areal Flood Advisory	LBF	Keith, Lincoln, Perkins	3 hr
Aug 19, 7:42 PM MDT	Special Weather Statement	LBF	Perkins	48 min
Aug 19, 8:14 PM MDT	Special Weather Statement	LBF	Chase	46 min
Aug 19, 8:17 PM MDT	Severe Thunderstorm Warning Considerable damage threat	LBF	Chase, Hayes, Lincoln, Perkins	43 min
Aug 19, 8:28 PM MDT	Special Weather Statement	LBF	Lincoln	47 min
Aug 19, 8:51 PM MDT	Areal Flood Advisory	LBF	Custer, Keith, Lincoln	4 hr
Aug 19, 8:56 PM MDT	Severe Thunderstorm Warning	LBF	Lincoln	49 min
Aug 19, 9:34 PM MDT	Special Weather Statement	LBF	Frontier, Hayes	41 min
Aug 19, 9:41 PM MDT	Special Weather Statement	LBF	Dawson	49 min
Aug 19, 10:22 PM MDT	Special Weather Statement	LBF	Custer	38 min
Aug 19, 10:28 PM MDT	Special Weather Statement	LBF	Frontier	47 min
Aug 19, 10:32 PM MDT	Special Weather Statement	LBF	Chase	43 min
Aug 19, 11:15 PM MDT	Special Weather Statement	LBF	Chase	45 min
Aug 19, 11:58 PM MDT	Special Weather Statement	LBF	Hayes	47 min
Aug 20, 12:39 AM MDT	Areal Flood Warning	LBF	Chase, Hayes	19 hr
Aug 20, 12:50 AM MDT	Areal Flood Advisory	LBF	Lincoln	2 hr
Aug 20, 12:56 AM MDT	Special Weather Statement	LBF	Lincoln	49 min
Aug 20, 2:12 AM MDT	Special Weather Statement	LBF	Custer	48 min
Aug 20, 9:35 AM MDT	River Flood Advisory	LBF	Hayes	10 hr
Aug 20, 1:40 PM MDT	River Flood Advisory	LBF	Lincoln	24 hr

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.