Alert archive / Nebraska / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 111, NWS North Platte, NE

August 6, 2021Sheridan County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Aug 6, 2021, 6:03 PM MDT for Sheridan County, Nebraska. It was in force for 42 min. 2 reports 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 6, 2021, 6:03 PM MDT (00:03 UTC)
Expired: Aug 6, 2021, 6:45 PM MDT
In force: 42 min
Issued by: NWS North Platte, NE
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Sheridan County, NE

The radar

The Rapid City radar (KUDX), 144 km from the middle of the area, began a volume at 00:05 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 6, 6:27 PM MDT	TSTM WND GST 60	Sse Gordon, NE
Aug 6, 6:35 PM MDT	TSTM WND GST 60	6 N Gordon, NE

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Rapid City, SD (KUNR), launched 00:00Z, 0.1 hours before the alert went out and 138 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: 624 J/kg
Mixed-layer CIN: -211 J/kg
Mixed-layer LCL: 2013 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 8 m²/s²
0-3 km storm-relative helicity: 48 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

739 
WUUS53 KLBF 070003
SVRLBF
NEC161-070045-
/O.NEW.KLBF.SV.W.0111.210807T0003Z-210807T0045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service North Platte NE
603 PM MDT Fri Aug 6 2021

The National Weather Service in North Platte has issued a

* Severe Thunderstorm Warning for...
  Northern Sheridan County in the Panhandle of Nebraska...

* Until 645 PM MDT.

* At 603 PM MDT, a severe thunderstorm was located 11 miles southwest
  of White Clay, or 11 miles north of Hay Springs, moving east at 20
  mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
  Gordon, White Clay, Clinton, Pine Ridge, Hoover Lake, Intersection
  of Highway 87 and Craven Creek Road, Metcalf State Wildlife
  Management Area, Intersection of Beaver Creek Road and White Clay
  Creek Road, Intersection of Highway 87 and Larabee Road and Mount
  Maria.

This includes Highway 20 between mile markers 74 and 76, and between
mile markers 95 and 111.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4300 10209 4276 10209 4270 10277 4275 10278
      4278 10277 4279 10279 4285 10280 4300 10279
TIME...MOT...LOC 0003Z 253DEG 19KT 4285 10269 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Roberg

1 follow-up statement

869 
WWUS53 KLBF 070035
SVSLBF

Severe Weather Statement
National Weather Service North Platte NE
635 PM MDT Fri Aug 6 2021

NEC161-070045-
/O.CON.KLBF.SV.W.0111.000000T0000Z-210807T0045Z/
Sheridan NE-
635 PM MDT Fri Aug 6 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM MDT
FOR NORTHEASTERN SHERIDAN COUNTY...

At 635 PM MDT, a severe thunderstorm was located near Gordon, moving
northeast at 50 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Gordon, White Clay, Clinton, Pine Ridge, Hoover Lake, Intersection of
Highway 87 and Craven Creek Road, Intersection of Highway 87 and
Larabee Road and Mount Maria.

This includes Highway 20 between mile markers 96 and 111.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4300 10209 4276 10209 4273 10245 4285 10262
      4300 10279
TIME...MOT...LOC 0035Z 245DEG 43KT 4288 10218 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Roberg

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 6, 6:39 PM MDT	Severe Thunderstorm Warning	LBF	Cherry	51 min
Aug 6, 7:33 PM MDT	Special Weather Statement	LBF	Cherry	42 min
Aug 6, 8:40 PM MDT	Special Weather Statement	LBF	Hayes	50 min
Aug 6, 10:19 PM MDT	Special Weather Statement	LBF	Dawson	41 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.