Alert archive / Nebraska / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 112, NWS North Platte, NE

August 6, 2021Cherry County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Aug 6, 2021, 6:39 PM MDT for Cherry County, Nebraska. It was in force for 51 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 6, 2021, 6:39 PM MDT (00:39 UTC)
Expired: Aug 6, 2021, 7:30 PM MDT
In force: 51 min
Issued by: NWS North Platte, NE
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Cherry County, NE

The radar

The North Platte radar (KLNX), 132 km from the middle of the area, began a volume at 00:43 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

Rapid City, SD (KUNR), launched 00:00Z, 0.7 hours before the alert went out and 168 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: 624 J/kg
Mixed-layer CIN: -211 J/kg
Mixed-layer LCL: 2013 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 8 m²/s²
0-3 km storm-relative helicity: 48 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

065 
WUUS53 KLBF 070039
SVRLBF
NEC031-070130-
/O.NEW.KLBF.SV.W.0112.210807T0039Z-210807T0130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service North Platte NE
639 PM MDT Fri Aug 6 2021

The National Weather Service in North Platte has issued a

* Severe Thunderstorm Warning for...
  Northwestern Cherry County in north central Nebraska...

* Until 730 PM MDT.

* At 638 PM MDT, severe thunderstorms were located along a line
  extending from 12 miles south of Wounded Knee to 12 miles southeast
  of Gordon, moving east at 50 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
  Merriman, Medicine Lake, Eli, Highway 61 Crossing The Niobrara
  River, Irwin, Intersection of Highway 61 and Shadbolt Road,
  Intersection of Highway 20 and Irwin Road, Shell Lake State
  Wildlife Management Area, Rock Hill and Bayonne.

This includes the following highways...
 Highway 20 between mile markers 113 and 154.
 Highway 61 between mile markers 206 and 231.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4300 10140 4274 10119 4258 10205 4300 10208
TIME...MOT...LOC 0038Z 253DEG 46KT 4297 10230 4270 10200 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Roberg

2 follow-up statements

407 
WWUS53 KLBF 070114
SVSLBF

Severe Weather Statement
National Weather Service North Platte NE
714 PM MDT Fri Aug 6 2021

NEC031-070130-
/O.CON.KLBF.SV.W.0112.000000T0000Z-210807T0130Z/
Cherry NE-
714 PM MDT Fri Aug 6 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM MDT
FOR NORTHWESTERN CHERRY COUNTY...

At 713 PM MDT, a severe thunderstorm was located over Merriman, or 18
miles south of Martin, moving northeast at 45 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Merriman, Medicine Lake, Highway 61 Crossing The Niobrara River,
Intersection of Highway 61 and Shadbolt Road and Eli.

This includes the following highways...
 Highway 20 between mile markers 126 and 154.
 Highway 61 between mile markers 208 and 231.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4300 10140 4274 10119 4265 10169 4299 10197
TIME...MOT...LOC 0113Z 229DEG 38KT 4291 10170 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Roberg

079 
WWUS53 KLBF 070131
SVSLBF

Severe Weather Statement
National Weather Service North Platte NE
731 PM MDT Fri Aug 6 2021

NEC031-070141-
/O.EXP.KLBF.SV.W.0112.000000T0000Z-210807T0130Z/
Cherry NE-
731 PM MDT Fri Aug 6 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN CHERRY COUNTY HAS
EXPIRED...
                
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 has been allowed to expire.  However gusty
winds and heavy rain are still possible with this thunderstorm.

LAT...LON 4300 10140 4274 10119 4265 10169 4299 10197
TIME...MOT...LOC 0131Z 253DEG 46KT 4297 10144 

$$

Roberg

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 6, 6:03 PM MDT	Severe Thunderstorm Warning	LBF	Sheridan	42 min
Aug 6, 7:33 PM MDT	Special Weather Statement	LBF	Cherry	42 min
Aug 6, 8:40 PM MDT	Special Weather Statement	LBF	Hayes	50 min
Aug 6, 10:19 PM MDT	Special Weather Statement	LBF	Dawson	41 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.