Alert archive / Nebraska / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 137, NWS North Platte, NE

August 19, 2021Keith County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Aug 19, 2021, 5:17 PM MDT for Keith County, Nebraska. It was in force for 43 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 19, 2021, 5:17 PM MDT (23:17 UTC)
Expired: Aug 19, 2021, 6:00 PM MDT
In force: 43 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), 137 km from the middle of the area, began a volume at 23:21 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 19, 1:14 PM MDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 11.3 hours before the alert went out and 104 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: 541 J/kg
Mixed-layer CIN: -64 J/kg
Mixed-layer LCL: 810 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 125 m²/s²
0-3 km storm-relative helicity: 96 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

246 
WUUS53 KLBF 192317
SVRLBF
NEC101-200000-
/O.NEW.KLBF.SV.W.0137.210819T2317Z-210820T0000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service North Platte NE
517 PM MDT Thu Aug 19 2021

The National Weather Service in North Platte has issued a

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

* Until 600 PM MDT.

* At 516 PM MDT, a severe thunderstorm was located near Brule, or 7
  miles northeast of Big Springs, moving east at 25 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...
  Ogallala, Brule, Lemoyne, Keystone, Roscoe, Kingsley Dam, Eagle
  Gulch Campground, Ruthon, Clear Creek State Wildlife Management
  Area, Megeath, Broganville, Otter Creek Campground, Lake View
  Campground and Belmar.

This includes the following highways...
 Highway 61 between mile markers 79 and 107.
 Highway 92 between mile markers 122 and 138.
 Interstate 80 in Nebraska between mile markers 109 and 141.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

If on or near Lake McConaughy, get away from the water and move 
indoors or inside a vehicle. Remember, lightning can strike out to 
15 miles from the parent thunderstorm. If you can hear thunder, you 
are close enough to be struck by lightning. Move to safe shelter 
now!  Do not be caught on the water in a thunderstorm.

&&

LAT...LON 4131 10205 4139 10152 4101 10141 4100 10197
      4101 10205
TIME...MOT...LOC 2316Z 254DEG 23KT 4114 10197 

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

$$

Taylor

1 follow-up statement

686 
WWUS53 KLBF 192337
SVSLBF

Severe Weather Statement
National Weather Service North Platte NE
537 PM MDT Thu Aug 19 2021

NEC101-200000-
/O.CON.KLBF.SV.W.0137.000000T0000Z-210820T0000Z/
Keith NE-
537 PM MDT Thu Aug 19 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM MDT
FOR CENTRAL KEITH COUNTY...

At 536 PM MDT, a severe thunderstorm was located near Kingsley Dam,
or near Ogallala, moving east at 40 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...
Ogallala, Brule, Lemoyne, Keystone, Roscoe, Kingsley Dam, Eagle Gulch
Campground, Belmar, Broganville, Otter Creek Campground and Lake View
Campground.

This includes the following highways...
 Highway 61 between mile markers 79 and 107.
 Highway 92 between mile markers 123 and 138.
 Interstate 80 in Nebraska between mile markers 114 and 141.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 1100 PM MDT for southwestern
Nebraska.

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

&&

LAT...LON 4139 10152 4101 10141 4100 10197 4107 10195
      4132 10199
TIME...MOT...LOC 2336Z 250DEG 35KT 4121 10172 

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

$$

Taylor

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 19, 3:00 PM MDT	Special Weather Statement	LBF	Deuel	45 min
Aug 19, 3:13 PM MDT	Severe Thunderstorm Warning	LBF	Deuel, Garden	47 min
Aug 19, 3:22 PM MDT	Special Weather Statement	LBF	Sheridan	38 min
Aug 19, 4:01 PM MDT	Severe Thunderstorm Warning	LBF	Deuel, Garden	44 min
Aug 19, 4:02 PM MDT	Areal Flood Advisory	LBF	Deuel	3 hr
Aug 19, 4:35 PM MDT	Severe Thunderstorm Warning	LBF	Arthur, Garden, Keith	40 min
Aug 19, 4:48 PM MDT	Areal Flood Advisory	LBF	Garden	3 hr
Aug 19, 4:48 PM MDT	Severe Thunderstorm Warning	LBF	Deuel, Garden	27 min
Aug 19, 4:50 PM MDT	Special Weather Statement	LBF	Garden	40 min
Aug 19, 5:00 PM MDT	Special Weather Statement	LBF	Perkins	45 min
Aug 19, 5:10 PM MDT	Tornado Warning	LBF	Chase, Perkins	50 min
Aug 19, 5:19 PM MDT	Severe Thunderstorm Warning Considerable damage threat	LBF	Arthur	41 min
Aug 19, 5:23 PM MDT	Special Weather Statement	LBF	Grant	52 min
Aug 19, 5:44 PM MDT	Areal Flood Advisory	LBF	Keith	3 hr
Aug 19, 5:59 PM MDT	Severe Thunderstorm Warning	LBF	Arthur, Keith, Lincoln, McPherson	46 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.