Alert archive / Nebraska / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 3, NWS North Platte, NE

April 6, 2021Custer County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Apr 6, 2021, 7:23 PM CDT for Custer County, Nebraska. It was in force for 37 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: Apr 6, 2021, 7:23 PM CDT (00:23 UTC)
Expired: Apr 6, 2021, 8:00 PM CDT
In force: 37 min
Issued by: NWS North Platte, NE
Area: Storm-based polygon
Hail: 1.75 in
Wind: 60.0 mph

County Custer County, NE

The radar

The North Platte radar (KLNX), 126 km from the middle of the area, began a volume at 00:27 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
Apr 6, 7:24 PM CDT	HAIL 1.75	Ansley, NE
Apr 6, 7:28 PM CDT	HAIL 1	Ansley, NE	VIA SOCIAL MEDIA.

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

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 0.4 hours before the alert went out and 111 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 670 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 173 m²/s²
0-3 km storm-relative helicity: 362 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.4

Open this sounding in Storm Lab

The text

As transmitted.

937 
WUUS53 KLBF 070023
SVRLBF
NEC041-070100-
/O.NEW.KLBF.SV.W.0003.210407T0023Z-210407T0100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service North Platte NE
723 PM CDT Tue Apr 6 2021

The National Weather Service in North Platte has issued a

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

* Until 800 PM CDT.

* At 723 PM CDT, a severe thunderstorm was located over Ansley, or 15
  miles southeast of Broken Bow, moving north at 20 mph.

  HAZARD...Golf ball size hail and 60 mph wind gusts.

  SOURCE...Trained weather spotters.

  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...
  Ansley, Mason City, Berwyn, Weissert, Westerville and Arcadia
  Diversion Dam State Wildlife Management Area.

This includes the following highways...
 Highway 183 between mile markers 84 and 106.
 Highway 2 between mile markers 286 and 302.
 Highway 92 between mile markers 300 and 306.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4118 9931 4125 9958 4153 9944 4148 9921
      4140 9921 4139 9920 4133 9920
TIME...MOT...LOC 0023Z 202DEG 19KT 4129 9939 

HAIL...1.75IN
WIND...60MPH
 
$$

Snively

2 follow-up statements

972 
WWUS53 KLBF 070042
SVSLBF

Severe Weather Statement
National Weather Service North Platte NE
742 PM CDT Tue Apr 6 2021

NEC041-070100-
/O.CON.KLBF.SV.W.0003.000000T0000Z-210407T0100Z/
Custer NE-
742 PM CDT Tue Apr 6 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM CDT
FOR EAST CENTRAL CUSTER COUNTY...

At 741 PM CDT, a severe thunderstorm was located near Ansley, or 16
miles east of Broken Bow, moving northeast at 20 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...
Ansley, Mason City, Berwyn, Weissert, Westerville and Arcadia
Diversion Dam State Wildlife Management Area.

This includes the following highways...
 Highway 183 between mile markers 84 and 106.
 Highway 2 between mile markers 288 and 302.
 Highway 92 between mile markers 300 and 306.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4118 9931 4124 9953 4153 9944 4148 9921
      4140 9921 4139 9920 4133 9920
TIME...MOT...LOC 0041Z 207DEG 18KT 4135 9932 

HAIL...1.50IN
WIND...60MPH
 
$$

Snively

716 
WWUS53 KLBF 070058
SVSLBF

Severe Weather Statement
National Weather Service North Platte NE
758 PM CDT Tue Apr 6 2021

NEC041-070108-
/O.EXP.KLBF.SV.W.0003.000000T0000Z-210407T0100Z/
Custer NE-
758 PM CDT Tue Apr 6 2021

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL CUSTER COUNTY
WILL EXPIRE AT 800 PM CDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.  However small hail
and gusty winds are still possible with this thunderstorm.

LAT...LON 4118 9931 4124 9953 4153 9944 4148 9921
      4140 9921 4139 9920 4133 9920
TIME...MOT...LOC 0058Z 202DEG 19KT 4143 9928 

$$

Snively

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 6, 7:01 PM CDT	Special Weather Statement	LBF	Custer	29 min
Apr 6, 7:04 PM CDT	Special Weather Statement	LBF	McPherson	41 min
Apr 6, 7:21 PM CDT	Special Weather Statement	LBF	Cherry	39 min
Apr 6, 7:30 PM CDT	Special Weather Statement	LBF	Sherman	30 min
Apr 6, 7:30 PM CDT	Special Weather Statement	LBF	Logan, Thomas	45 min
Apr 6, 7:39 PM CDT	Special Weather Statement	LBF	Sherman	36 min
Apr 6, 7:43 PM CDT	Special Weather Statement	LBF	Thomas	47 min
Apr 6, 8:00 PM CDT	Special Weather Statement	LBF	Cherry	45 min
Apr 6, 8:01 PM CDT	Special Weather Statement	LBF	Custer	44 min
Apr 6, 8:23 PM CDT	Special Weather Statement	LBF	Logan, Thomas	52 min
Apr 6, 8:43 PM CDT	Special Weather Statement	LBF	Cherry	47 min
Apr 6, 9:13 PM CDT	Special Weather Statement	LBF	Blaine, Thomas	47 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.