Alert archive / Nebraska / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 141, NWS North Platte, NE

August 19, 2021Chase County, Perkins County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Aug 19, 2021, 6:32 PM MDT for Chase County, Perkins County, Nebraska. It was in force for 43 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, 6:32 PM MDT (00:32 UTC)
Expired: Aug 19, 2021, 7:15 PM MDT
In force: 43 min
Issued by: NWS North Platte, NE
Area: Storm-based polygon
Tornado: Possible
Hail: 1.0 in
Wind: 60.0 mph

Counties Chase County, NE, Perkins County, NE

The radar

The Goodland radar (KGLD), 142 km from the middle of the area, began a volume at 00:33 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, 1:14 PM MDT	Severe Thunderstorm Watch	SPC	6 hr
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, 0.5 hours before the alert went out and 100 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.

139 
WUUS53 KLBF 200032
SVRLBF
NEC029-135-200115-
/O.NEW.KLBF.SV.W.0141.210820T0032Z-210820T0115Z/

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

The National Weather Service in North Platte has issued a

* Severe Thunderstorm Warning for...
  Southeastern Perkins County in southwestern Nebraska...
  Northeastern Chase County in southwestern Nebraska...

* Until 715 PM MDT.

* At 631 PM MDT, a severe thunderstorm was located 11 miles south of
  Madrid, or 12 miles southeast of Grant, 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...
  Madrid and Wanamaker State Wildfire Management Area. 

This includes Highway 61 between mile markers 42 and 60.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

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

&&

LAT...LON 4054 10178 4069 10192 4088 10146 4068 10134
      4051 10134
TIME...MOT...LOC 0031Z 248DEG 18KT 4070 10160 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Taylor

2 follow-up statements

030 
WWUS53 KLBF 200059
SVSLBF

Severe Weather Statement
National Weather Service North Platte NE
659 PM MDT Thu Aug 19 2021

NEC029-135-200115-
/O.CON.KLBF.SV.W.0141.000000T0000Z-210820T0115Z/
Perkins NE-Chase NE-
659 PM MDT Thu Aug 19 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM MDT
FOR SOUTHEASTERN PERKINS AND NORTHEASTERN CHASE COUNTIES...

At 658 PM MDT, a severe thunderstorm was located near Madrid, or 11
miles southeast of Grant, moving northeast at 30 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
southeastern Perkins and northeastern Chase Counties.

This includes Highway 61 between mile markers 51 and 58.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 4065 10166 4071 10173 4088 10146 4068 10134
      4064 10136
TIME...MOT...LOC 0058Z 204DEG 25KT 4076 10153 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Taylor

970 
WWUS53 KLBF 200117
SVSLBF

Severe Weather Statement
National Weather Service North Platte NE
717 PM MDT Thu Aug 19 2021

NEC029-135-200126-
/O.EXP.KLBF.SV.W.0141.000000T0000Z-210820T0115Z/
Perkins NE-Chase NE-
717 PM MDT Thu Aug 19 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN PERKINS AND
NORTHEASTERN CHASE COUNTIES HAS EXPIRED...
    
The severe thunderstorm which prompted the warning has weakened.
Therefore, the warning has been allowed to expire. However small 
hail, gusty winds and heavy rain are still possible with this 
thunderstorm.

A Tornado Watch remains in effect until 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 4065 10166 4071 10173 4088 10146 4068 10134
      4064 10136
TIME...MOT...LOC 0116Z 248DEG 18KT 4079 10142 

$$

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, 6:42 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, 8:40 PM MDT	Severe Thunderstorm Warning Considerable damage threat	LBF	Chase, Frontier, Hayes, Lincoln, Perkins	50 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.