Alert archive / Nebraska / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 178, NWS North Platte, NE

September 16, 2021Keith County, Perkins County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Sep 16, 2021, 6:20 PM MDT for Keith County, Perkins County, Nebraska. It was in force for 40 min. 3 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
Sep 16, 2021, 6:20 PM MDT (00:20 UTC)
Expired
Sep 16, 2021, 7:00 PM MDT
In force
40 min
Issued by
NWS North Platte, NE
Area
Storm-based polygon
Hail
1.5 in
Wind
60.0 mph

Counties Keith County, NE, Perkins County, NE

The radar

The North Platte radar (KLNX), 140 km from the middle of the area, began a volume at 00:23 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

TimeReportWhereRemark
Sep 16, 6:41 PM MDTTSTM WND GST 67Ogallala, NE
Sep 16, 6:43 PM MDTHAIL 1Ogallala, NEMPING REPORT.
Sep 16, 6:55 PM MDTTSTM WND DMGOgallala, NEAPPROX 3 INCH BRANCHES DOWN VIA TWITTER.

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, 0.3 hours before the alert went out and 98 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-pSkew-T log-p diagram, N. Platte/Lee Bi, NE at 00:00Z on 2021-09-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1601 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, N. Platte/Lee Bi, NE at 00:00Z on 2021-09-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 106 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
1601 J/kg
Mixed-layer CIN
-38 J/kg
Mixed-layer LCL
2561 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
106 m²/s²
0-3 km storm-relative helicity
153 m²/s²
Significant tornado parameter
0.0
Supercell composite
4.7

Open this sounding in Storm Lab

The text

As transmitted.

089 
WUUS53 KLBF 170020
SVRLBF
NEC101-135-170100-
/O.NEW.KLBF.SV.W.0178.210917T0020Z-210917T0100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service North Platte NE
620 PM MDT Thu Sep 16 2021

The National Weather Service in North Platte has issued a

* Severe Thunderstorm Warning for...
  Northern Perkins County in southwestern Nebraska...
  Southern Keith County in southwestern Nebraska...

* Until 700 PM MDT.

* At 619 PM MDT, a severe thunderstorm was located near Brule, or 9
  miles southwest of Ogallala, moving east at 25 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...
  Ogallala, Brule, Keystone, Roscoe, Kingsley Dam, Nevens,
  Broganville and Megeath.

This includes the following highways...
 Highway 61 between mile markers 74 and 98.
 Interstate 80 in Nebraska between mile markers 112 and 143.

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 4094 10197 4116 10200 4122 10190 4126 10141
      4093 10138
TIME...MOT...LOC 0019Z 257DEG 23KT 4104 10186 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.50 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Snively
1 follow-up statement
587 
WWUS53 KLBF 170037
SVSLBF

Severe Weather Statement
National Weather Service North Platte NE
637 PM MDT Thu Sep 16 2021

NEC101-135-170100-
/O.CON.KLBF.SV.W.0178.000000T0000Z-210917T0100Z/
Perkins NE-Keith NE-
637 PM MDT Thu Sep 16 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM MDT
FOR NORTHEASTERN PERKINS AND SOUTHEASTERN KEITH COUNTIES...

At 637 PM MDT, a severe thunderstorm was located near Ogallala,
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, Keystone, Roscoe, Kingsley Dam, Nevens and Broganville. 

This includes the following highways...
 Highway 61 between mile markers 75 and 97.
 Interstate 80 in Nebraska between mile markers 120 and 143.

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 4094 10184 4122 10187 4126 10141 4093 10138
TIME...MOT...LOC 0037Z 257DEG 23KT 4107 10171 

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

$$

Snively

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 16, 6:38 PM MDTSpecial Weather StatementLBFKeith52 min
Sep 16, 6:51 PM MDTSpecial Weather StatementLBFSheridan39 min
Sep 16, 6:58 PM MDTSevere Thunderstorm WarningLBFArthur, Keith, Lincoln, McPherson, Perkins47 min
Sep 16, 7:21 PM MDTSevere Thunderstorm WarningLBFCherry39 min
Sep 16, 7:27 PM MDTSpecial Weather StatementLBFPerkins33 min
Sep 16, 7:33 PM MDTSpecial Weather StatementLBFCherry42 min
Sep 16, 7:35 PM MDTSevere Thunderstorm WarningLBFBlaine, Custer, Hooker, Lincoln, Logan, McPherson and 1 more55 min
Sep 16, 7:55 PM MDTSpecial Weather StatementLBFCherry50 min
Sep 16, 8:00 PM MDTSpecial Weather StatementLBFLincoln45 min
Sep 16, 8:09 PM MDTSpecial Weather StatementLBFCherry36 min
Sep 16, 8:27 PM MDTSpecial Weather StatementLBFCuster, Logan63 min
Sep 16, 8:31 PM MDTSpecial Weather StatementLBFLincoln59 min
Sep 16, 8:36 PM MDTSpecial Weather StatementLBFCherry39 min
Sep 16, 8:37 PM MDTSpecial Weather StatementLBFChase68 min
Sep 16, 8:47 PM MDTSpecial Weather StatementLBFArthur, Hooker, McPherson, Thomas43 min
Sep 16, 8:56 PM MDTSpecial Weather StatementLBFGarfield, Holt, Loup, Rock49 min
Sep 16, 9:15 PM MDTSpecial Weather StatementLBFLincoln45 min
Sep 16, 9:28 PM MDTSpecial Weather StatementLBFCuster62 min
Sep 16, 9:30 PM MDTSpecial Weather StatementLBFMcPherson45 min
Sep 16, 9:50 PM MDTSpecial Weather StatementLBFLincoln25 min
Sep 16, 9:54 PM MDTSpecial Weather StatementLBFBoyd51 min
Sep 16, 9:56 PM MDTSpecial Weather StatementLBFChase34 min
Sep 16, 10:14 PM MDTSpecial Weather StatementLBFLogan, Thomas46 min
Sep 16, 10:21 PM MDTSpecial Weather StatementLBFChase, Perkins39 min
Sep 16, 10:57 PM MDTSpecial Weather StatementLBFHayes, Keith, Perkins48 min
Sep 16, 10:58 PM MDTSpecial Weather StatementLBFBlaine47 min
Sep 16, 11:42 PM MDTSpecial Weather StatementLBFLincoln48 min
Sep 17, 12:30 AM MDTSpecial Weather StatementLBFFrontier45 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2021Every 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.