Alert archive / Nebraska / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 62, NWS North Platte, NE

June 23, 2021Brown County, Rock County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Jun 23, 2021, 6:45 PM CDT for Brown County, Rock County, Nebraska. It was in force for 17 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 23, 2021, 6:45 PM CDT (23:45 UTC)
Expired: Jun 23, 2021, 7:02 PM CDT
In force: 17 min
Issued by: NWS North Platte, NE
Area: Storm-based polygon
Hail: 1.5 in
Wind: 60.0 mph

Counties Brown County, NE, Rock County, NE

The radar

The North Platte radar (KLNX), 85 km from the middle of the area, began a volume at 23:47 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 23, 4:40 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 11.8 hours before the alert went out and 163 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: 211 J/kg
Mixed-layer CIN: -469 J/kg
Mixed-layer LCL: 2679 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 32 m²/s²
0-3 km storm-relative helicity: 100 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

As transmitted.

851 
WUUS53 KLBF 232345
SVRLBF
NEC017-149-240030-
/O.NEW.KLBF.SV.W.0062.210623T2345Z-210624T0030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service North Platte NE
645 PM CDT Wed Jun 23 2021

The National Weather Service in North Platte has issued a

* Severe Thunderstorm Warning for...
  Southern Rock County in north central Nebraska...
  Northern Brown County in north central Nebraska...

* Until 730 PM CDT.

* At 644 PM CDT, a severe thunderstorm was located near Johnstown, 
  moving southeast at 35 mph.

  HAZARD...Ping pong 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...
  Ainsworth, Long Pine, Johnstown, Hofeld Lake, Duff, Jones Lake and
  Twin Lakes State Wildlife Management Area.

This includes the following highways...
 Highway 183 between mile markers 161 and 180, and between mile
markers 194 and 198.
 Highway 20 between mile markers 231 and 256.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4252 10011 4268 10001 4249 9931 4218 9960
TIME...MOT...LOC 2344Z 295DEG 30KT 4257 9997 

HAIL...1.50IN
WIND...60MPH
 
$$

Taylor

1 follow-up statement

113 
WWUS53 KLBF 240002
SVSLBF

Severe Weather Statement
National Weather Service North Platte NE
702 PM CDT Wed Jun 23 2021

NEC017-149-240011-
/O.CAN.KLBF.SV.W.0062.000000T0000Z-210624T0030Z/
Rock NE-Brown NE-
702 PM CDT Wed Jun 23 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN ROCK AND NORTHERN
BROWN COUNTIES IS CANCELLED...
    
The severe thunderstorm which prompted the warning has weakened.
moved out of the warned area. Therefore, the warning has been
cancelled.  However gusty winds and heavy rain are still possible
with this thunderstorm.

A Severe Thunderstorm Watch remains in effect until 1100 PM CDT for
north central 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 4252 10011 4268 10001 4249 9931 4218 9960
TIME...MOT...LOC 0000Z 295DEG 30KT 4288 9860 

$$

Taylor

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 23, 4:51 PM CDT	Special Weather Statement	LBF	Keya Paha	39 min
Jun 23, 5:19 PM CDT	Severe Thunderstorm Warning	LBF	Keya Paha	41 min
Jun 23, 5:22 PM CDT	Severe Thunderstorm Warning	LBF	Cherry	38 min
Jun 23, 5:58 PM CDT	Severe Thunderstorm Warning	LBF	Brown, Keya Paha, Rock	47 min
Jun 23, 5:59 PM CDT	Severe Thunderstorm Warning	LBF	Brown, Cherry	46 min
Jun 23, 6:05 PM CDT	Severe Thunderstorm Warning	LBF	Boyd, Holt, Keya Paha	23 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.