Alert archive / Nebraska / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 103, NWS North Platte, NE

July 30, 20214 counties in Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Jul 30, 2021, 6:05 PM CDT for 4 counties in Nebraska. It was in force for 40 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, 6:05 PM CDT (23:05 UTC)
Expired: Jul 30, 2021, 6:45 PM CDT
In force: 40 min
Issued by: NWS North Platte, NE
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Blaine County, NE, Custer County, NE, Logan County, NE, Thomas County, NE

The radar

The North Platte radar (KLNX), 46 km from the middle of the area, began a volume at 23:09 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
Jul 30, 4:04 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 11.1 hours before the alert went out and 66 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: 1419 J/kg
Mixed-layer CIN: -169 J/kg
Mixed-layer LCL: 1255 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 154 m²/s²
0-3 km storm-relative helicity: 120 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.8

Open this sounding in Storm Lab

The text

As transmitted.

886 
WUUS53 KLBF 302305
SVRLBF
NEC009-041-113-171-302345-
/O.NEW.KLBF.SV.W.0103.210730T2305Z-210730T2345Z/

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

The National Weather Service in North Platte has issued a

* Severe Thunderstorm Warning for...
  Northeastern Logan County in west central Nebraska...
  Northwestern Custer County in central Nebraska...
  Southwestern Blaine County in north central Nebraska...
  Southeastern Thomas County in north central Nebraska...

* Until 645 PM CDT.

* At 605 PM CDT, a severe thunderstorm was located 11 miles southwest
  of Dunning, or 20 miles northeast of Stapleton, moving southeast 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.

* This severe thunderstorm will remain over mainly rural areas of
  northeastern Logan, northwestern Custer, southwestern Blaine and
  southeastern Thomas Counties.

This includes Highway 2 near mile marker 250.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

A Tornado Watch remains in effect until 1000 PM CDT for central,
north central and west central Nebraska.

LAT...LON 4150 10019 4172 10040 4181 10029 4171 9996
TIME...MOT...LOC 2305Z 304DEG 17KT 4171 10026 

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

Gomez

2 follow-up statements

855 
WWUS53 KLBF 302325
SVSLBF

Severe Weather Statement
National Weather Service North Platte NE
625 PM CDT Fri Jul 30 2021

NEC171-302334-
/O.CAN.KLBF.SV.W.0103.000000T0000Z-210730T2345Z/
Thomas NE-
625 PM CDT Fri Jul 30 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN THOMAS COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

A Tornado Watch remains in effect until 1000 PM CDT for central,
north central and west central Nebraska.

LAT...LON 4150 10019 4168 10036 4169 10035 4174 10029
      4175 10027 4178 10024 4171 9996
TIME...MOT...LOC 2324Z 304DEG 17KT 4166 10016 

$$

NEC009-041-113-302345-
/O.CON.KLBF.SV.W.0103.000000T0000Z-210730T2345Z/
Logan NE-Custer NE-Blaine NE-
625 PM CDT Fri Jul 30 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM CDT
FOR NORTHEASTERN LOGAN...NORTHWESTERN CUSTER AND SOUTHWESTERN BLAINE
COUNTIES...

At 624 PM CDT, a severe thunderstorm was located 12 miles south of
Dunning, or 22 miles northeast of Stapleton, moving southeast 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.

This severe thunderstorm will remain over mainly rural areas of
northeastern Logan, northwestern Custer and southwestern Blaine
Counties.

This includes Highway 2 near mile marker 250.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4150 10019 4168 10036 4169 10035 4174 10029
      4175 10027 4178 10024 4171 9996
TIME...MOT...LOC 2324Z 304DEG 17KT 4166 10016 

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

Gomez

301 
WWUS53 KLBF 302341
SVSLBF

Severe Weather Statement
National Weather Service North Platte NE
641 PM CDT Fri Jul 30 2021

NEC009-041-113-302351-
/O.EXP.KLBF.SV.W.0103.000000T0000Z-210730T2345Z/
Logan NE-Custer NE-Blaine NE-
641 PM CDT Fri Jul 30 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN LOGAN...
NORTHWESTERN CUSTER AND SOUTHWESTERN BLAINE COUNTIES WILL EXPIRE AT
645 PM CDT...
                
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.

A Tornado Watch remains in effect until 1000 PM CDT for central,
north central and west central Nebraska.

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

LAT...LON 4150 10019 4168 10036 4169 10035 4174 10029
      4175 10027 4178 10024 4171 9996
TIME...MOT...LOC 2341Z 304DEG 17KT 4162 10008 

$$

NMJ

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 29, 7:03 PM CDT	Special Weather Statement	LBF	Lincoln	42 min
Jul 29, 7:20 PM CDT	Severe Thunderstorm Warning	LBF	Keith, Lincoln	40 min
Jul 30, 5:40 PM CDT	Special Weather Statement	LBF	Logan	50 min
Jul 30, 5:58 PM CDT	Special Weather Statement	LBF	Thomas	47 min
Jul 30, 6:32 PM CDT	Severe Thunderstorm Warning	LBF	Logan, McPherson, Thomas	43 min
Jul 30, 6:46 PM CDT	Special Weather Statement	LBF	Garden	29 min
Jul 30, 6:47 PM CDT	Special Weather Statement	LBF	Logan	43 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.