Alert archive / Nebraska / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 167, NWS North Platte, NE

August 30, 2021Cherry County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Aug 30, 2021, 10:11 PM MDT for Cherry County, Nebraska. It was in force for 49 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 30, 2021, 10:11 PM MDT (04:11 UTC)
Expired: Aug 30, 2021, 11:00 PM MDT
In force: 49 min
Issued by: NWS North Platte, NE
Area: Storm-based polygon
Tornado: Possible
Damage threat: Considerable
Hail: 1.75 in
Wind: 60.0 mph

County Cherry County, NE

The radar

The North Platte radar (KLNX), 88 km from the middle of the area, began a volume at 04:13 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 30, 10:25 PM MDT	HAIL 1	9 S Valentine, NE	DELAYED REPORT

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 30, 8:57 PM MDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 4.2 hours before the alert went out and 180 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.

357 
WUUS53 KLBF 310411
SVRLBF
NEC031-310500-
/O.NEW.KLBF.SV.W.0167.210831T0411Z-210831T0500Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service North Platte NE
1111 PM CDT Mon Aug 30 2021

The National Weather Service in North Platte has issued a

* Severe Thunderstorm Warning for...
  Northeastern Cherry County in north central Nebraska...

* Until midnight CDT.

* At 1110 PM CDT, a severe thunderstorm was located 7 miles south of
  Valentine, moving southeast at 15 mph.

  HAZARD...Golf 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...
  Valentine, Valentine National Wildlife Refuge, Highway 97 crossing
  the Niobrara River, Big Alkali Lake State Wildlife Management Area
  and Schlagel Creek State Wildlife Management Area.

This includes the following highways...
 Highway 20 between mile markers 191 and 220.
 Highway 97 between mile markers 129 and 141.
 Highway 83 between mile markers 186 and 218.
 Highway 12 between mile markers 1 and 3.

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 4284 10078 4294 10056 4266 10022 4247 10059
TIME...MOT...LOC 0410Z 328DEG 13KT 4276 10058 

TORNADO...POSSIBLE
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

NMJ

1 follow-up statement

610 
WWUS53 KLBF 310430
SVSLBF

Severe Weather Statement
National Weather Service North Platte NE
1130 PM CDT Mon Aug 30 2021

NEC031-310500-
/O.CON.KLBF.SV.W.0167.000000T0000Z-210831T0500Z/
Cherry NE-
1130 PM CDT Mon Aug 30 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT CDT
FOR NORTHEASTERN CHERRY COUNTY...

At 1130 PM CDT, a severe thunderstorm was located 12 miles south of
Valentine, moving southeast 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...
Valentine National Wildlife Refuge, Highway 97 crossing the Niobrara
River, Big Alkali Lake State Wildlife Management Area and Schlagel
Creek State Wildlife Management Area.

This includes the following highways...
 Highway 20 between mile markers 199 and 220.
 Highway 97 between mile markers 133 and 138.
 Highway 83 between mile markers 186 and 207.

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 4266 10022 4247 10059 4280 10069 4287 10048
TIME...MOT...LOC 0430Z 328DEG 13KT 4270 10053 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 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, 6:57 PM MDT	Special Weather Statement	LBF	Frontier	48 min
Aug 30, 8:47 PM MDT	Severe Thunderstorm Warning	LBF	Cherry	43 min
Aug 30, 9:29 PM MDT	Severe Thunderstorm Warning Considerable damage threat	LBF	Cherry	46 min
Aug 30, 9:33 PM MDT	Special Weather Statement	LBF	Keya Paha	42 min
Aug 30, 9:55 PM MDT	Areal Flood Advisory	LBF	Cherry	54 min
Aug 30, 10:24 PM MDT	Special Weather Statement	LBF	Holt	51 min
Aug 30, 10:55 PM MDT	Severe Thunderstorm Warning	LBF	Brown, Cherry	50 min
Aug 30, 11:42 PM MDT	Severe Thunderstorm Warning Considerable damage threat	LBF	Brown, Cherry	48 min
Aug 31, 12:20 AM MDT	Special Weather Statement	LBF	Brown	40 min
Aug 31, 12:37 AM MDT	Special Weather Statement	LBF	Boyd	53 min
Aug 31, 12:59 AM MDT	Special Weather Statement	LBF	Keya Paha	46 min
Aug 31, 1:32 AM MDT	Special Weather Statement	LBF	Holt	43 min
Aug 31, 1:43 AM MDT	Special Weather Statement	LBF	Brown, Keya Paha	47 min
Aug 31, 2:15 AM MDT	Special Weather Statement	LBF	Holt	45 min
Aug 31, 2:28 AM MDT	Special Weather Statement	LBF	Boyd, Holt, Rock	62 min
Aug 31, 2:50 AM MDT	Special Weather Statement	LBF	Garfield	40 min
Aug 31, 3:20 AM MDT	Special Weather Statement	LBF	Garfield, Wheeler	40 min
Aug 31, 3:58 AM MDT	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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.