Alert archive / Nebraska / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 105, NWS North Platte, NE

July 30, 2021Garden County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Jul 30, 2021, 7:49 PM MDT for Garden County, Nebraska. It was in force for 26 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
Jul 30, 2021, 7:49 PM MDT (01:49 UTC)
Expired
Jul 30, 2021, 8:15 PM MDT
In force
26 min
Issued by
NWS North Platte, NE
Area
Storm-based polygon
Hail
1.5 in
Wind
60.0 mph

County Garden County, NE

The radar

The North Platte radar (KLNX), 164 km from the middle of the area, began a volume at 01:51 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, 1.8 hours before the alert went out and 177 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 2021-07-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2904 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 2021-07-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 115 square meters per square second.1939Sfc1 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
2904 J/kg
Mixed-layer CIN
-55 J/kg
Mixed-layer LCL
1646 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
115 m²/s²
0-3 km storm-relative helicity
200 m²/s²
Significant tornado parameter
0.6
Supercell composite
17.8

Open this sounding in Storm Lab

The text

As transmitted.

397 
WUUS53 KLBF 310149
SVRLBF
NEC069-310215-
/O.NEW.KLBF.SV.W.0105.210731T0149Z-210731T0215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service North Platte NE
749 PM MDT Fri Jul 30 2021

The National Weather Service in North Platte has issued a

* Severe Thunderstorm Warning for...
  Northwestern Garden County in the Panhandle of Nebraska...

* Until 815 PM MDT.

* At 749 PM MDT, a severe thunderstorm was located 8 miles southwest
  of Crescent Lake National Wildlife Refuge, or 21 miles northwest of
  Oshkosh, moving northeast at 15 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...
  Crescent Lake National Wildlife Refuge, Richardson Lake, Mumper and
  Tralnor Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Large hail and damaging winds and continuous cloud to ground
lightning is occurring with this storm. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.

&&

LAT...LON 4193 10257 4181 10225 4157 10248 4163 10264
      4174 10264 4175 10266
TIME...MOT...LOC 0149Z 207DEG 14KT 4168 10255 

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

NMJ
2 follow-up statements
269 
WWUS53 KLBF 310201
SVSLBF

Severe Weather Statement
National Weather Service North Platte NE
801 PM MDT Fri Jul 30 2021

NEC069-310215-
/O.CON.KLBF.SV.W.0105.000000T0000Z-210731T0215Z/
Garden NE-
801 PM MDT Fri Jul 30 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 PM MDT
FOR NORTHWESTERN GARDEN COUNTY...

At 801 PM MDT, a severe thunderstorm was located near Crescent Lake
National Wildlife Refuge, or 24 miles northwest of Oshkosh, moving
north at 20 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...
Crescent Lake National Wildlife Refuge, Richardson Lake, Mumper and
Tralnor Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4193 10257 4181 10225 4157 10248 4163 10264
      4174 10264 4175 10266
TIME...MOT...LOC 0201Z 196DEG 16KT 4173 10254 

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

NMJ
860 
WWUS53 KLBF 310211
SVSLBF

Severe Weather Statement
National Weather Service North Platte NE
811 PM MDT Fri Jul 30 2021

NEC069-310221-
/O.EXP.KLBF.SV.W.0105.000000T0000Z-210731T0215Z/
Garden NE-
811 PM MDT Fri Jul 30 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN GARDEN COUNTY
WILL EXPIRE AT 815 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
and gusty winds are still possible with this thunderstorm.

LAT...LON 4193 10257 4181 10225 4157 10248 4163 10264
      4174 10264 4175 10266
TIME...MOT...LOC 0211Z 207DEG 14KT 4176 10252 

$$

NMJ

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 30, 6:01 PM MDTSpecial Weather StatementLBFBlaine29 min
Jul 30, 6:10 PM MDTSpecial Weather StatementLBFGarden35 min
Jul 30, 6:11 PM MDTSpecial Weather StatementLBFThomas34 min
Jul 30, 6:35 PM MDTSpecial Weather StatementLBFKeya Paha40 min
Jul 30, 6:44 PM MDTSpecial Weather StatementLBFGarden46 min
Jul 30, 6:55 PM MDTSpecial Weather StatementLBFKeya Paha35 min
Jul 30, 6:57 PM MDTSpecial Weather StatementLBFLogan33 min
Jul 30, 7:26 PM MDTSpecial Weather StatementLBFKeya Paha34 min
Jul 30, 7:27 PM MDTSpecial Weather StatementLBFGarden33 min
Jul 30, 7:40 PM MDTSpecial Weather StatementLBFGarden20 min
Jul 30, 7:59 PM MDTSpecial Weather StatementLBFBrown, Holt, Rock46 min
Jul 30, 8:11 PM MDTSpecial Weather StatementLBFGarden49 min
Jul 30, 8:40 PM MDTSpecial Weather StatementLBFBrown, Rock50 min
Jul 30, 9:20 PM MDTSpecial Weather StatementLBFGarfield40 min
Jul 30, 9:23 PM MDTSpecial Weather StatementLBFBrown52 min
Jul 30, 9:54 PM MDTSpecial Weather StatementLBFGarfield, Wheeler66 min
Jul 30, 10:05 PM MDTSpecial Weather StatementLBFBlaine40 min
Jul 30, 10:47 PM MDTSpecial Weather StatementLBFGarfield, Loup43 min
Jul 30, 11:27 PM MDTSpecial Weather StatementLBFHooker, Thomas48 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.