Alert archive / Nebraska / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 12, NWS North Platte, NE

May 15, 2021Perkins County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at May 15, 2021, 6:42 PM MDT for Perkins County, Nebraska. It was in force for 48 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: May 15, 2021, 6:42 PM MDT (00:42 UTC)
Expired: May 15, 2021, 7:30 PM MDT
In force: 48 min
Issued by: NWS North Platte, NE
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

County Perkins County, NE

The radar

The North Platte radar (KLNX), 162 km from the middle of the area, began a volume at 00:46 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
May 15, 7:28 PM MDT	HAIL 1	4 Nnw Grant, NE

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, 0.7 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: 266 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 1597 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: -5 m²/s²
0-3 km storm-relative helicity: 90 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

As transmitted.

224 
WUUS53 KLBF 160042
SVRLBF
NEC135-160130-
/O.NEW.KLBF.SV.W.0012.210516T0042Z-210516T0130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service North Platte NE
642 PM MDT Sat May 15 2021

The National Weather Service in North Platte has issued a

* Severe Thunderstorm Warning for...
  Northwestern Perkins County in southwestern Nebraska...

* Until 730 PM MDT.

* At 642 PM MDT, a severe thunderstorm was located 10 miles west of
  Grant, moving northeast at 10 mph.

  HAZARD...Quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Damage to vehicles is expected.

* Locations impacted include...
  Wild Horse Spring.

This includes Highway 61 between mile markers 70 and 71.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4082 10194 4090 10200 4100 10186 4088 10169
TIME...MOT...LOC 0042Z 229DEG 8KT 4089 10191 

HAIL...1.00IN
WIND...<50MPH
 
$$

Taylor

2 follow-up statements

999 
WWUS53 KLBF 160053
SVSLBF

Severe Weather Statement
National Weather Service North Platte NE
653 PM MDT Sat May 15 2021

NEC135-160130-
/O.CON.KLBF.SV.W.0012.000000T0000Z-210516T0130Z/
Perkins NE-
653 PM MDT Sat May 15 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM MDT
FOR NORTHWESTERN PERKINS COUNTY...

At 652 PM MDT, a severe thunderstorm was located 9 miles northwest of
Grant, moving northeast at 10 mph.

HAZARD...Quarter size hail.

SOURCE...Radar indicated.

IMPACT...Damage to vehicles is expected.

Locations impacted include...
Wild Horse Spring.

This includes Highway 61 between mile markers 70 and 71.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4083 10190 4091 10197 4100 10186 4088 10169
TIME...MOT...LOC 0052Z 229DEG 8KT 4091 10189 

HAIL...1.00IN
WIND...<50MPH
 
$$

Taylor

273 
WWUS53 KLBF 160131
SVSLBF

Severe Weather Statement
National Weather Service North Platte NE
731 PM MDT Sat May 15 2021

NEC135-160140-
/O.EXP.KLBF.SV.W.0012.000000T0000Z-210516T0130Z/
Perkins NE-
731 PM MDT Sat May 15 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN PERKINS COUNTY
HAS EXPIRED...
                
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 has been allowed to expire.  However small
hail, gusty winds and heavy rain are still possible with this
thunderstorm.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
North Platte.

LAT...LON 4083 10190 4091 10197 4100 10186 4088 10169
TIME...MOT...LOC 0130Z 229DEG 8KT 4096 10181 

$$

Taylor

The office that day

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

Issued	Product	Office	Counties	Lasted
May 15, 6:01 PM MDT	Special Weather Statement	LBF	Chase	44 min
May 15, 6:03 PM MDT	Special Weather Statement	LBF	Perkins	42 min
May 15, 6:31 PM MDT	Special Weather Statement	LBF	Lincoln	44 min
May 15, 6:48 PM MDT	Special Weather Statement	LBF	Arthur	42 min
May 15, 7:06 PM MDT	Severe Thunderstorm Warning	LBF	Lincoln	39 min
May 15, 7:13 PM MDT	Severe Thunderstorm Warning	LBF	Keith	47 min
May 15, 7:35 PM MDT	Special Weather Statement	LBF	Perkins	40 min
May 15, 7:44 PM MDT	Severe Thunderstorm Warning	LBF	Perkins	46 min
May 15, 8:06 PM MDT	Special Weather Statement	LBF	Lincoln	39 min
May 15, 8:07 PM MDT	Special Weather Statement	LBF	Custer	38 min
May 15, 8:23 PM MDT	Severe Thunderstorm Warning	LBF	Lincoln	52 min
May 15, 8:42 PM MDT	Special Weather Statement	LBF	Perkins	48 min
May 15, 9:56 PM MDT	Special Weather Statement	LBF	Perkins	49 min
May 15, 11:08 PM MDT	Special Weather Statement	LBF	Perkins	52 min
May 15, 11:21 PM MDT	Areal Flood Warning	LBF	Lincoln, Perkins	4 hr
May 16, 3:16 AM MDT	Areal Flood Advisory	LBF	Cherry, Grant, Hooker	3 hr
May 16, 3:38 AM MDT	Areal Flood Advisory	LBF	Sheridan	101 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.