Alert archive / Nebraska / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 2, NWS North Platte, NE

April 6, 2021Custer County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Apr 6, 2021, 6:28 PM CDT for Custer County, Nebraska. It was in force for 32 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: Apr 6, 2021, 6:28 PM CDT (23:28 UTC)
Expired: Apr 6, 2021, 7:00 PM CDT
In force: 32 min
Issued by: NWS North Platte, NE
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

County Custer County, NE

The radar

The North Platte radar (KLNX), 109 km from the middle of the area, began a volume at 23:30 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, 6:40 PM CDT	HAIL 1.25	5 Se Oconto, NE	HAIL RANGED FROM PEA TO HALF DOLLAR SIZE, BUT MOSTLY NICKELS AND QUARTERS

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 12:00Z, 11.5 hours before the alert went out and 74 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: 91 J/kg
Mixed-layer CIN: -649 J/kg
Mixed-layer LCL: 1066 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 136 m²/s²
0-3 km storm-relative helicity: 208 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

331 
WUUS53 KLBF 062328
SVRLBF
NEC041-070000-
/O.NEW.KLBF.SV.W.0002.210406T2328Z-210407T0000Z/

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

The National Weather Service in North Platte has issued a

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

* Until 700 PM CDT.

* At 627 PM CDT, a severe thunderstorm was located just south of 
  Oconto, or 20 miles north of Lexington, moving north at 40 mph.

  HAZARD...60 mph wind gusts and half dollar size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Oconto, Buckeye and Pressey State Wildlife Management Area. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4133 9982 4132 9949 4105 9964 4105 9985
TIME...MOT...LOC 2327Z 188DEG 36KT 4107 9973 

HAIL...1.25IN
WIND...60MPH
 
$$

Snively

2 follow-up statements

729 
WWUS53 KLBF 062345
SVSLBF

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

NEC041-070000-
/O.CON.KLBF.SV.W.0002.000000T0000Z-210407T0000Z/
Custer NE-
645 PM CDT Tue Apr 6 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM CDT
FOR SOUTH CENTRAL CUSTER COUNTY...

At 645 PM CDT, a severe thunderstorm was located near Oconto, or 17
miles south of Broken Bow, moving northeast at 30 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...
Oconto, Buckeye and Pressey State Wildlife Management Area. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4132 9949 4105 9964 4110 9977 4133 9975
TIME...MOT...LOC 2345Z 207DEG 24KT 4115 9966 

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

Snively

642 
WWUS53 KLBF 062358
SVSLBF

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

NEC041-070008-
/O.EXP.KLBF.SV.W.0002.000000T0000Z-210407T0000Z/
Custer NE-
658 PM CDT Tue Apr 6 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL CUSTER COUNTY
WILL EXPIRE AT 700 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 4132 9949 4105 9964 4110 9977 4133 9975
TIME...MOT...LOC 2358Z 205DEG 31KT 4120 9958 

$$

Snively

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 5, 7:03 PM CDT	Severe Thunderstorm Warning	LBF	Holt	27 min
Apr 5, 7:42 PM CDT	Special Weather Statement	LBF	Garfield	48 min
Apr 5, 8:57 PM CDT	Special Weather Statement	LBF	Rock	33 min
Apr 6, 3:22 AM CDT	Winter Weather Advisory	LBF	Sheridan	31 hr
Apr 6, 9:12 AM CDT	Special Weather Statement	LBF	Boyd	48 min
Apr 6, 5:45 PM CDT	Special Weather Statement	LBF	Custer	30 min
Apr 6, 6:12 PM CDT	Special Weather Statement	LBF	Custer	33 min
Apr 6, 6:37 PM CDT	Special Weather Statement	LBF	Hooker	38 min
Apr 6, 6:49 PM CDT	Special Weather Statement	LBF	Logan, Thomas	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.