Alert archive / Nebraska / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 168, NWS North Platte, NE

August 30, 2021Brown County, Cherry County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Aug 30, 2021, 11:55 PM CDT for Brown County, Cherry County, 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 30, 2021, 11:55 PM CDT (04:55 UTC)
Expired: Aug 31, 2021, 12:45 AM CDT
In force: 50 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

The radar

The North Platte radar (KLNX), 74 km from the middle of the area, began a volume at 04:59 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 30, 9:57 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 4.9 hours before the alert went out and 165 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: 1819 J/kg
Mixed-layer CIN: -45 J/kg
Mixed-layer LCL: 2084 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 81 m²/s²
0-3 km storm-relative helicity: 300 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 18.9

Open this sounding in Storm Lab

The text

As transmitted.

848 
WUUS53 KLBF 310455
SVRLBF
NEC017-031-310545-
/O.NEW.KLBF.SV.W.0168.210831T0455Z-210831T0545Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service North Platte NE
1155 PM CDT Mon Aug 30 2021

The National Weather Service in North Platte has issued a

* Severe Thunderstorm Warning for...
  East central Cherry County in north central Nebraska...
  West central Brown County in north central Nebraska...

* Until 1245 AM CDT.

* At 1154 PM CDT, a severe thunderstorm was located 11 miles
  northeast of Valentine National Wildlife Refuge, or 18 miles south
  of Valentine, moving southeast 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...
  Johnstown and Wood Lake. 

This includes the following highways...
 Highway 20 between mile markers 208 and 239.
 Highway 83 between mile markers 193 and 199.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4268 10059 4279 10038 4257 9988 4229 10035
TIME...MOT...LOC 0454Z 317DEG 16KT 4263 10042 

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

$$

NMJ

1 follow-up statement

507 
WWUS53 KLBF 310526
SVSLBF

Severe Weather Statement
National Weather Service North Platte NE
1226 AM CDT Tue Aug 31 2021

NEC017-031-310545-
/O.CON.KLBF.SV.W.0168.000000T0000Z-210831T0545Z/
Cherry NE-Brown NE-
1226 AM CDT Tue Aug 31 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1245 AM CDT
FOR EAST CENTRAL CHERRY AND WEST CENTRAL BROWN COUNTIES...

At 1226 AM CDT, a severe thunderstorm was located 13 miles east of
Valentine National Wildlife Refuge, or 21 miles southeast of
Valentine, moving southeast at 15 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...
Johnstown and Wood Lake. 

This includes the following highways...
 Highway 20 between mile markers 212 and 236.
 Highway 83 between mile markers 193 and 195.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4263 10056 4274 10034 4265 10006 4259 9993
      4232 10037
TIME...MOT...LOC 0526Z 315DEG 13KT 4259 10036 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.50 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

NMJ

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 30, 7:57 PM CDT	Special Weather Statement	LBF	Frontier	48 min
Aug 30, 9:47 PM CDT	Severe Thunderstorm Warning	LBF	Cherry	43 min
Aug 30, 10:29 PM CDT	Severe Thunderstorm Warning Considerable damage threat	LBF	Cherry	46 min
Aug 30, 10:33 PM CDT	Special Weather Statement	LBF	Keya Paha	42 min
Aug 30, 10:55 PM CDT	Areal Flood Advisory	LBF	Cherry	54 min
Aug 30, 11:11 PM CDT	Severe Thunderstorm Warning Considerable damage threat	LBF	Cherry	49 min
Aug 30, 11:24 PM CDT	Special Weather Statement	LBF	Holt	51 min
Aug 31, 12:42 AM CDT	Severe Thunderstorm Warning Considerable damage threat	LBF	Brown, Cherry	48 min
Aug 31, 1:20 AM CDT	Special Weather Statement	LBF	Brown	40 min
Aug 31, 1:37 AM CDT	Special Weather Statement	LBF	Boyd	53 min
Aug 31, 1:59 AM CDT	Special Weather Statement	LBF	Keya Paha	46 min
Aug 31, 2:32 AM CDT	Special Weather Statement	LBF	Holt	43 min
Aug 31, 2:43 AM CDT	Special Weather Statement	LBF	Brown, Keya Paha	47 min
Aug 31, 3:15 AM CDT	Special Weather Statement	LBF	Holt	45 min
Aug 31, 3:28 AM CDT	Special Weather Statement	LBF	Boyd, Holt, Rock	62 min
Aug 31, 3:50 AM CDT	Special Weather Statement	LBF	Garfield	40 min
Aug 31, 4:20 AM CDT	Special Weather Statement	LBF	Garfield, Wheeler	40 min
Aug 31, 4:58 AM CDT	Special Weather Statement	LBF	Wheeler	17 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.