Alert archive / Nebraska / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 91, NWS North Platte, NE

July 9, 2021Custer County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Jul 9, 2021, 9:42 PM CDT for Custer County, Nebraska. It was in force for 48 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: Jul 9, 2021, 9:42 PM CDT (02:42 UTC)
Expired: Jul 9, 2021, 10:30 PM CDT
In force: 48 min
Issued by: NWS North Platte, NE
Area: Storm-based polygon
Hail: 1.0 in
Wind: 70.0 mph

County Custer County, NE

The radar

The Grand Island radar (KUEX), 123 km from the middle of the area, began a volume at 02:44 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
Jul 9, 3:16 PM CDT	Severe Thunderstorm Watch	SPC	9 hr
Jul 9, 9:06 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 2.7 hours before the alert went out and 100 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: 2799 J/kg
Mixed-layer CIN: -162 J/kg
Mixed-layer LCL: 1859 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 30 m²/s²
0-3 km storm-relative helicity: 117 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 4.9

Open this sounding in Storm Lab

The text

As transmitted.

142 
WUUS53 KLBF 100242
SVRLBF
NEC041-100330-
/O.NEW.KLBF.SV.W.0091.210710T0242Z-210710T0330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service North Platte NE
942 PM CDT Fri Jul 9 2021

The National Weather Service in North Platte has issued a

* Severe Thunderstorm Warning for...
  Southeastern Custer County in central Nebraska...

* Until 1030 PM CDT.

* At 942 PM CDT, severe thunderstorms were located along a line
  extending from 6 miles northeast of Mason City to 8 miles southwest
  of Berwyn, moving south at 25 mph.

  HAZARD...70 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect considerable 
           tree damage. Wind damage is also likely to mobile homes, 
           roofs, and outbuildings.

* Locations impacted include...
  Ansley, Mason City, Buckeye, Block Hill Basin, Gavin Siding,
  Intersection of Highway 183 and Cumro Road and Cumro.

This includes the following highways...
 Highway 183 between mile markers 73 and 92.
 Highway 2 between mile markers 291 and 307.
 Highway 92 between mile markers 300 and 308.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4105 9946 4131 9968 4133 9920 4105 9921
TIME...MOT...LOC 0242Z 339DEG 20KT 4129 9921 4128 9963 

HAIL...1.00IN
WIND...70MPH
 
$$

CDC

1 follow-up statement

458 
WWUS53 KLBF 100320
SVSLBF

Severe Weather Statement
National Weather Service North Platte NE
1020 PM CDT Fri Jul 9 2021

NEC041-100330-
/O.EXP.KLBF.SV.W.0091.000000T0000Z-210710T0330Z/
Custer NE-
1020 PM CDT Fri Jul 9 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CUSTER COUNTY
WILL EXPIRE AT 1030 PM CDT...
    
The storms which prompted the warning have weakened below severe
limits, and have exited the warned area. Therefore, the warning will
be allowed to expire.

A Severe Thunderstorm Watch remains in effect until 300 AM CDT for
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 4105 9946 4131 9968 4133 9920 4105 9921
TIME...MOT...LOC 0320Z 339DEG 20KT 4110 9911 4109 9953 

$$

Buttler

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 9, 7:01 PM CDT	Severe Thunderstorm Warning	LBF	Garden, Sheridan	44 min
Jul 9, 7:45 PM CDT	Severe Thunderstorm Warning	LBF	Arthur, Garden, Grant	45 min
Jul 9, 7:49 PM CDT	Special Weather Statement	LBF	Blaine	26 min
Jul 9, 8:06 PM CDT	Special Weather Statement	LBF	McPherson	24 min
Jul 9, 8:11 PM CDT	Special Weather Statement	LBF	Loup	34 min
Jul 9, 8:30 PM CDT	Special Weather Statement	LBF	Loup	45 min
Jul 9, 8:31 PM CDT	Special Weather Statement	LBF	McPherson	29 min
Jul 9, 8:45 PM CDT	Special Weather Statement	LBF	Custer	30 min
Jul 9, 8:58 PM CDT	Severe Thunderstorm Warning	LBF	Custer	47 min
Jul 9, 8:59 PM CDT	Severe Thunderstorm Warning	LBF	Custer, Lincoln, Logan	46 min
Jul 9, 9:02 PM CDT	Severe Thunderstorm Warning	LBF	Custer	43 min
Jul 9, 9:04 PM CDT	Special Weather Statement	LBF	Holt	41 min
Jul 9, 9:08 PM CDT	Special Weather Statement	LBF	Wheeler	52 min
Jul 9, 9:23 PM CDT	Severe Thunderstorm Warning	LBF	Holt	52 min
Jul 9, 9:27 PM CDT	Severe Thunderstorm Warning	LBF	Custer	33 min
Jul 9, 9:39 PM CDT	Special Weather Statement	LBF	Holt	36 min
Jul 9, 9:50 PM CDT	Severe Thunderstorm Warning	LBF	Holt	40 min
Jul 9, 10:31 PM CDT	Severe Thunderstorm Warning	LBF	Sheridan	59 min
Jul 9, 11:05 PM CDT	Severe Thunderstorm Warning	LBF	Arthur, Cherry, Garden, Grant, Sheridan	55 min
Jul 9, 11:21 PM CDT	Special Weather Statement	LBF	Sheridan	39 min
Jul 9, 11:53 PM CDT	Severe Thunderstorm Warning	LBF	Arthur, Cherry, Garden, Grant, Hooker, Keith and 3 more	67 min
Jul 9, 11:57 PM CDT	Tornado Warning	LBF	Arthur, Grant, Hooker, McPherson	33 min
Jul 10, 12:45 AM CDT	Severe Thunderstorm Warning	LBF	Blaine, Custer, Hooker, Lincoln, Logan, McPherson and 1 more	60 min
Jul 10, 1:20 AM CDT	Special Weather Statement	LBF	Lincoln	40 min
Jul 10, 1:42 AM CDT	Special Weather Statement	LBF	Custer	48 min
Jul 10, 2:18 AM CDT	Special Weather Statement	LBF	Lincoln	42 min
Jul 10, 2:22 AM CDT	Severe Thunderstorm Warning	LBF	Lincoln	53 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.