Alert archive / Nebraska / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 142, NWS North Platte, NE

August 19, 2021Chase County, Perkins County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Aug 19, 2021, 6:42 PM MDT for Chase County, Perkins County, Nebraska. It was in force for 48 min. 1 report 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: Aug 19, 2021, 6:42 PM MDT (00:42 UTC)
Expired: Aug 19, 2021, 7:30 PM MDT
In force: 48 min
Issued by: NWS North Platte, NE
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Chase County, NE, Perkins County, NE

The radar

The Goodland radar (KGLD), 155 km from the middle of the area, began a volume at 00:43 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
Aug 19, 7:00 PM MDT	HAIL 2	4 N Lamar, 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
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, 0.7 hours before the alert went out and 121 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.

189 
WUUS53 KLBF 200042
SVRLBF
NEC029-135-200130-
/O.NEW.KLBF.SV.W.0142.210820T0042Z-210820T0130Z/

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

The National Weather Service in North Platte has issued a

* Severe Thunderstorm Warning for...
  Southwestern Perkins County in southwestern Nebraska...
  Northwestern Chase County in southwestern Nebraska...

* Until 730 PM MDT.

* At 642 PM MDT, a severe thunderstorm was located near Pleasant
  Valley, or 14 miles east of Holyoke, moving northeast at 15 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...
  Venango, Lamar and Brandon. 

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 4082 10205 4094 10196 4065 10163 4050 10205
TIME...MOT...LOC 0042Z 231DEG 15KT 4062 10203 

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

$$

Taylor

2 follow-up statements

911 
WWUS53 KLBF 200101
SVSLBF

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

NEC029-135-200130-
/O.CON.KLBF.SV.W.0142.000000T0000Z-210820T0130Z/
Perkins NE-Chase NE-
701 PM MDT Thu Aug 19 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM MDT
FOR SOUTHWESTERN PERKINS AND NORTHWESTERN CHASE COUNTIES...

At 701 PM MDT, a severe thunderstorm was located 7 miles southeast of
Venango, or 13 miles southwest of Grant, moving northeast at 30 mph.

HAZARD...60 mph wind gusts and half dollar size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Venango, Lamar and Brandon. 

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 4082 10205 4094 10196 4065 10163 4056 10202
TIME...MOT...LOC 0101Z 239DEG 27KT 4071 10192 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.25 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Taylor

451 
WWUS53 KLBF 200130
SVSLBF

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

NEC029-135-200140-
/O.EXP.KLBF.SV.W.0142.000000T0000Z-210820T0130Z/
Perkins NE-Chase NE-
730 PM MDT Thu Aug 19 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN PERKINS AND
NORTHWESTERN CHASE COUNTIES HAS EXPIRED...
                
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 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.

LAT...LON 4082 10205 4094 10196 4065 10163 4056 10202
TIME...MOT...LOC 0130Z 231DEG 15KT 4078 10181 

$$

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, 6:50 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.