Alert archive / Nebraska / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 14, NWS North Platte, NE

May 15, 2021Keith County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at May 15, 2021, 7:13 PM MDT for Keith County, Nebraska. It was in force for 47 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: May 15, 2021, 7:13 PM MDT (01:13 UTC)
Expired: May 15, 2021, 8:00 PM MDT
In force: 47 min
Issued by: NWS North Platte, NE
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Keith County, NE

The radar

The North Platte radar (KLNX), 115 km from the middle of the area, began a volume at 01:13 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 nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 1.2 hours before the alert went out and 82 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.

025 
WUUS53 KLBF 160113
SVRLBF
NEC101-160200-
/O.NEW.KLBF.SV.W.0014.210516T0113Z-210516T0200Z/

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

The National Weather Service in North Platte has issued a

* Severe Thunderstorm Warning for...
  Northeastern Keith County in southwestern Nebraska...

* Until 800 PM MDT.

* At 713 PM MDT, a severe thunderstorm was located near Kingsley Dam,
  or 11 miles north of Ogallala, moving east at 10 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...
  Paxton, Keystone, Kingsley Dam, Big Bald Hill, Nevens and
  Broganville.

This includes the following highways...
 Highway 61 between mile markers 94 and 101.
 Highway 92 near mile marker 138.
 Interstate 80 in Nebraska between mile markers 141 and 145.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4119 10172 4138 10172 4138 10134 4108 10137
TIME...MOT...LOC 0113Z 278DEG 9KT 4129 10165 

HAIL...1.00IN
WIND...60MPH
 
$$

Taylor

2 follow-up statements

494 
WWUS53 KLBF 160132
SVSLBF

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

NEC101-160200-
/O.CON.KLBF.SV.W.0014.000000T0000Z-210516T0200Z/
Keith NE-
732 PM MDT Sat May 15 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM MDT
FOR NORTHEASTERN KEITH COUNTY...

At 732 PM MDT, a severe thunderstorm was located over Keystone, or 10
miles northeast of Ogallala, moving southeast at 15 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...
Paxton, Keystone, Kingsley Dam, Big Bald Hill, Nevens and
Broganville.

This includes the following highways...
 Highway 61 between mile markers 94 and 100.
 Interstate 80 in Nebraska between mile markers 141 and 145.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4119 10172 4135 10168 4138 10134 4108 10137
TIME...MOT...LOC 0132Z 308DEG 13KT 4122 10157 

HAIL...1.00IN
WIND...60MPH
 
$$

Taylor

906 
WWUS53 KLBF 160200
SVSLBF

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

NEC101-160209-
/O.EXP.KLBF.SV.W.0014.000000T0000Z-210516T0200Z/
Keith NE-
800 PM MDT Sat May 15 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN KEITH COUNTY WILL
EXPIRE AT 800 PM MDT...
                
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, 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 4119 10172 4135 10168 4138 10134 4108 10137
TIME...MOT...LOC 0159Z 278DEG 9KT 4121 10148 

$$

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, 6:42 PM MDT	Severe Thunderstorm Warning	LBF	Perkins	48 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, 7:35 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.