Alert archive / Nebraska / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 164, NWS North Platte, NE

August 28, 2021Custer County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Aug 28, 2021, 7:42 PM CDT for Custer County, Nebraska. It was in force for 33 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 28, 2021, 7:42 PM CDT (00:42 UTC)
Expired: Aug 28, 2021, 8:15 PM CDT
In force: 33 min
Issued by: NWS North Platte, NE
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Custer County, NE

The radar

The North Platte radar (KLNX), 91 km from the middle of the area, began a volume at 00:45 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 28, 3:57 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 0.7 hours before the alert went out and 91 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: 2510 J/kg
Mixed-layer CIN: -46 J/kg
Mixed-layer LCL: 2148 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 27 m²/s²
0-3 km storm-relative helicity: 167 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 8.7

Open this sounding in Storm Lab

The text

As transmitted.

724 
WUUS53 KLBF 290042
SVRLBF
NEC041-290115-
/O.NEW.KLBF.SV.W.0164.210829T0042Z-210829T0115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service North Platte NE
742 PM CDT Sat Aug 28 2021

The National Weather Service in North Platte has issued a

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

* Until 815 PM CDT.

* At 741 PM CDT, severe thunderstorms were located along a line
  extending from near Victoria Springs State Recreation Area to 11
  miles east of Arnold, moving east at 35 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...
  Broken Bow, Merna, Victoria Springs State Recreation Area, Lillian
  and Round Valley.

This includes the following highways...
 Highway 2 between mile markers 259 and 282.
 Highway 92 between mile markers 262 and 273.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4158 9939 4137 9957 4143 10004 4166 9981
TIME...MOT...LOC 0041Z 265DEG 29KT 4167 9975 4145 9998 

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

$$

Sporer

1 follow-up statement

688 
WWUS53 KLBF 290115
SVSLBF

Severe Weather Statement
National Weather Service North Platte NE
815 PM CDT Sat Aug 28 2021

NEC041-290125-
/O.EXP.KLBF.SV.W.0164.000000T0000Z-210829T0115Z/
Custer NE-
815 PM CDT Sat Aug 28 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN CUSTER COUNTY HAS
EXPIRED...
    
The storms which prompted the warning have weakened below severe
limits, and have exited the warned area. Therefore, the warning has
been allowed to expire.

A Severe Thunderstorm Watch remains in effect until 900 PM CDT for
central Nebraska.

LAT...LON 4158 9939 4137 9957 4143 10004 4166 9981
TIME...MOT...LOC 0115Z 265DEG 29KT 4169 9938 4147 9961 

$$

Sporer

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 28, 7:01 PM CDT	Special Weather Statement	LBF	Custer	29 min
Aug 28, 7:09 PM CDT	Severe Thunderstorm Warning Considerable damage threat	LBF	Garfield, Holt, Loup, Wheeler	66 min
Aug 28, 7:13 PM CDT	Severe Thunderstorm Warning	LBF	Blaine, Custer, Loup	62 min
Aug 28, 7:15 PM CDT	Special Weather Statement	LBF	Frontier	30 min
Aug 28, 7:31 PM CDT	Severe Thunderstorm Warning	LBF	Frontier, Lincoln	44 min
Aug 28, 7:46 PM CDT	Special Weather Statement	LBF	Garfield	44 min
Aug 28, 8:03 PM CDT	Areal Flood Advisory	LBF	Blaine, Loup	3 hr
Aug 28, 8:07 PM CDT	Special Weather Statement	LBF	Holt	38 min
Aug 28, 8:18 PM CDT	Special Weather Statement	LBF	Loup	42 min
Aug 28, 8:19 PM CDT	Special Weather Statement	LBF	Wheeler	41 min
Aug 28, 8:21 PM CDT	Special Weather Statement	LBF	Frontier	39 min
Aug 28, 8:55 PM CDT	Special Weather Statement	LBF	Frontier	50 min
Aug 28, 8:57 PM CDT	Special Weather Statement	LBF	Custer	48 min
Aug 28, 10:21 PM CDT	Special Weather Statement	LBF	Frontier	39 min
Aug 28, 11:33 PM CDT	Areal Flood Advisory	LBF	Garfield, Wheeler	6 hr
Aug 29, 12:03 AM CDT	Special Weather Statement	LBF	Frontier	42 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.