Alert archive / Nebraska / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 64, NWS North Platte, NE

June 23, 2021Brown County, Cherry County, Keya Paha County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Jun 23, 2021, 8:12 PM CDT for Brown County, Cherry County, Keya Paha County, Nebraska. It was in force for 18 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, 8:12 PM CDT (01:12 UTC)
Expired: Jun 23, 2021, 8:30 PM CDT
In force: 18 min
Issued by: NWS North Platte, NE
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Brown County, NE, Cherry County, NE, Keya Paha County, NE

The radar

The North Platte radar (KLNX), 106 km from the middle of the area, began a volume at 01:12 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 00:00Z, 1.2 hours before the alert went out and 197 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: 3468 J/kg
Mixed-layer CIN: -185 J/kg
Mixed-layer LCL: 1979 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 82 m²/s²
0-3 km storm-relative helicity: 127 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.6

Open this sounding in Storm Lab

The text

As transmitted.

791 
WUUS53 KLBF 240112
SVRLBF
NEC017-031-103-240130-
/O.NEW.KLBF.SV.W.0064.210624T0112Z-210624T0130Z/

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

The National Weather Service in North Platte has issued a

* Severe Thunderstorm Warning for...
  Northeastern Cherry County in north central Nebraska...
  Northwestern Brown County in north central Nebraska...
  West central Keya Paha County in north central Nebraska...

* Until 830 PM CDT.

* At 811 PM CDT, a severe thunderstorm was located 10 miles east of
  Valentine, 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...
  Sparks and Smith Falls State Park. 

This includes the following highways...
 Highway 20 between mile markers 203 and 206.
 Highway 12 between mile markers 3 and 26.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Large hail and damaging winds and continuous cloud to ground
lightning is occurring with this storm. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.

&&

LAT...LON 4277 10010 4278 10050 4299 10051 4300 10017
      4299 10016
TIME...MOT...LOC 0111Z 261DEG 16KT 4290 10035 

HAIL...1.00IN
WIND...60MPH
 
$$

Gomez

2 follow-up statements

698 
WWUS53 KLBF 240121
SVSLBF

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

NEC017-031-103-240130-
/O.CON.KLBF.SV.W.0064.000000T0000Z-210624T0130Z/
Cherry NE-Brown NE-Keya Paha NE-
821 PM CDT Wed Jun 23 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM CDT
FOR NORTHEASTERN CHERRY...NORTHWESTERN BROWN AND WEST CENTRAL KEYA
PAHA COUNTIES...

At 821 PM CDT, a severe thunderstorm was located 11 miles west of
Norden, or 13 miles east of Valentine, 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...
Sparks and Smith Falls State Park. 

This includes Highway 12 between mile markers 12 and 26.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

&&

LAT...LON 4277 10010 4278 10035 4299 10039 4300 10017
      4299 10016
TIME...MOT...LOC 0121Z 261DEG 16KT 4291 10029 

HAIL...1.00IN
WIND...60MPH
 
$$

Gomez

776 
WWUS53 KLBF 240128
SVSLBF

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

NEC017-031-103-240138-
/O.EXP.KLBF.SV.W.0064.000000T0000Z-210624T0130Z/
Cherry NE-Brown NE-Keya Paha NE-
828 PM CDT Wed Jun 23 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN CHERRY...
NORTHWESTERN BROWN AND WEST CENTRAL KEYA PAHA COUNTIES WILL EXPIRE AT
830 PM CDT...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire.  However small hail is still possible with this
thunderstorm.

A Severe Thunderstorm Watch remains in effect until 1100 PM CDT for
north central Nebraska.

LAT...LON 4277 10010 4278 10035 4299 10039 4300 10017
      4299 10016
TIME...MOT...LOC 0128Z 261DEG 16KT 4291 10026 

$$

Gomez

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 23, 7:25 PM CDT	Special Weather Statement	LBF	Keya Paha	50 min
Jun 23, 8:04 PM CDT	Severe Thunderstorm Warning	LBF	Keya Paha	41 min
Jun 23, 8:39 PM CDT	Special Weather Statement	LBF	Grant	36 min
Jun 23, 8:44 PM CDT	Severe Thunderstorm Warning	LBF	Keya Paha	46 min
Jun 23, 9:07 PM CDT	Severe Thunderstorm Warning	LBF	Brown, Keya Paha, Rock	53 min
Jun 23, 9:28 PM CDT	Severe Thunderstorm Warning	LBF	Keya Paha	32 min
Jun 23, 9:47 PM CDT	Severe Thunderstorm Warning	LBF	Boyd, Holt, Keya Paha, Rock	43 min
Jun 23, 9:50 PM CDT	Severe Thunderstorm Warning	LBF	Brown, Keya Paha	40 min
Jun 23, 10:25 PM CDT	Severe Thunderstorm Warning	LBF	Brown, Cherry, Keya Paha, Rock	35 min
Jun 23, 10:27 PM CDT	Severe Thunderstorm Warning	LBF	Holt, Wheeler	33 min
Jun 23, 10:33 PM CDT	Special Weather Statement	LBF	Brown	27 min
Jun 23, 10:53 PM CDT	Severe Thunderstorm Warning	LBF	Holt, Wheeler	52 min
Jun 23, 10:57 PM CDT	Severe Thunderstorm Warning	LBF	Brown, Cherry, Keya Paha, Loup, Rock	48 min
Jun 23, 11:05 PM CDT	Special Weather Statement	LBF	Blaine, Logan, Loup	40 min
Jun 23, 11:20 PM CDT	Severe Thunderstorm Warning	LBF	Blaine, Brown, Custer, Loup	25 min
Jun 23, 11:36 PM CDT	Areal Flood Advisory	LBF	Garfield, Holt, Loup, Rock, Wheeler	3 hr
Jun 23, 11:40 PM CDT	Severe Thunderstorm Warning	LBF	Blaine, Custer, Garfield, Holt, Loup, Rock and 1 more	50 min
Jun 24, 12:30 AM CDT	Severe Thunderstorm Warning	LBF	Blaine, Custer, Garfield, Holt, Loup, Wheeler	30 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.