Alert archive / Nebraska / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 126, NWS North Platte, NE

August 14, 2021Sheridan County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Aug 14, 2021, 4:26 PM MDT for Sheridan County, Nebraska. It was in force for 49 min. 1 report 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: Aug 14, 2021, 4:26 PM MDT (22:26 UTC)
Expired: Aug 14, 2021, 5:15 PM MDT
In force: 49 min
Issued by: NWS North Platte, NE
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

County Sheridan County, NE

The radar

The Rapid City radar (KUDX), 150 km from the middle of the area, began a volume at 22:26 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

Time	Report	Where	Remark
Aug 14, 4:41 PM MDT	HAIL 0.88	10 Nnw Hay Springs, NE

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

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 14, 3:28 PM MDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Rapid City, SD (KUNR), launched 12:00Z, 10.4 hours before the alert went out and 144 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: 911 J/kg
Mixed-layer CIN: -150 J/kg
Mixed-layer LCL: 1691 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 93 m²/s²
0-3 km storm-relative helicity: 90 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.7

Open this sounding in Storm Lab

The text

As transmitted.

971 
WUUS53 KLBF 142226
SVRLBF
NEC161-142315-
/O.NEW.KLBF.SV.W.0126.210814T2226Z-210814T2315Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service North Platte NE
426 PM MDT Sat Aug 14 2021

The National Weather Service in North Platte has issued a

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

* Until 515 PM MDT.

* At 426 PM MDT, a severe thunderstorm was located 10 miles north of
  Hay Springs, moving southeast at 15 mph.

  HAZARD...60 mph wind gusts and half dollar size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Hay Springs, Intersection of Beaver Creek Road and White Clay Creek
  Road, Intersection of Highway 87 and Antelope Road, Walgren Lake
  State Recreation Area and Metcalf State Wildlife Management Area.

This includes Highway 20 between mile markers 74 and 88.
 
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 4292 10279 4283 10240 4256 10264 4268 10278
      4278 10277 4279 10279
TIME...MOT...LOC 2226Z 300DEG 12KT 4283 10276 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.25 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

NMJ

2 follow-up statements

881 
WWUS53 KLBF 142248
SVSLBF

Severe Weather Statement
National Weather Service North Platte NE
448 PM MDT Sat Aug 14 2021

NEC161-142315-
/O.CON.KLBF.SV.W.0126.000000T0000Z-210814T2315Z/
Sheridan NE-
448 PM MDT Sat Aug 14 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM MDT
FOR NORTHWESTERN SHERIDAN COUNTY...

At 447 PM MDT, a severe thunderstorm was located 9 miles north of Hay
Springs, moving southeast at 10 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...
Hay Springs, Intersection of Beaver Creek Road and White Clay Creek
Road, Intersection of Highway 87 and Antelope Road and Metcalf State
Wildlife Management Area.

This includes Highway 20 between mile markers 74 and 85.
 
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 4289 10264 4282 10245 4260 10269 4268 10278
      4278 10277 4279 10279 4292 10279
TIME...MOT...LOC 2247Z 307DEG 9KT 4281 10276 

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

$$

NMJ

289 
WWUS53 KLBF 142307
SVSLBF

Severe Weather Statement
National Weather Service North Platte NE
507 PM MDT Sat Aug 14 2021

NEC161-142316-
/O.EXP.KLBF.SV.W.0126.000000T0000Z-210814T2315Z/
Sheridan NE-
507 PM MDT Sat Aug 14 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN SHERIDAN COUNTY
WILL EXPIRE AT 515 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 gusty
winds are still possible with this thunderstorm.

A Severe Thunderstorm Watch remains in effect until 1100 PM MDT for
the Panhandle of Nebraska.

LAT...LON 4289 10264 4282 10245 4260 10269 4268 10278
      4278 10277 4279 10279 4292 10279
TIME...MOT...LOC 2306Z 300DEG 12KT 4278 10269 

$$

NMJ

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 14, 5:09 AM MDT	Special Weather Statement	LBF	Keith	51 min
Aug 14, 5:18 AM MDT	Severe Thunderstorm Warning	LBF	Keith	42 min
Aug 14, 5:43 AM MDT	Severe Thunderstorm Warning	LBF	Keith	47 min
Aug 14, 5:51 AM MDT	Severe Thunderstorm Warning	LBF	Keith	19 min
Aug 14, 5:56 AM MDT	Severe Thunderstorm Warning	LBF	Keith, Lincoln, McPherson	49 min
Aug 14, 6:23 AM MDT	Severe Thunderstorm Warning	LBF	Keith, Perkins	37 min
Aug 14, 6:44 AM MDT	Special Weather Statement	LBF	McPherson	46 min
Aug 14, 6:59 AM MDT	Severe Thunderstorm Warning Considerable damage threat	LBF	Chase, Perkins	46 min
Aug 14, 7:35 AM MDT	Special Weather Statement	LBF	Keith	40 min
Aug 14, 7:44 AM MDT	Severe Thunderstorm Warning	LBF	Chase, Hayes, Perkins	31 min
Aug 14, 8:14 AM MDT	Severe Thunderstorm Warning	LBF	Chase, Hayes, Lincoln, Perkins	46 min
Aug 14, 8:33 AM MDT	Special Weather Statement	LBF	Perkins	42 min
Aug 14, 8:49 AM MDT	Severe Thunderstorm Warning	LBF	Keith, Perkins	41 min
Aug 14, 8:59 AM MDT	Severe Thunderstorm Warning Considerable damage threat	LBF	Chase, Hayes, Perkins	26 min
Aug 14, 9:28 AM MDT	Severe Thunderstorm Warning	LBF	Perkins	47 min
Aug 14, 10:02 AM MDT	Severe Thunderstorm Warning Considerable damage threat	LBF	Chase, Hayes, Lincoln, Perkins	43 min
Aug 14, 10:44 AM MDT	Special Weather Statement	LBF	Hayes	46 min
Aug 14, 11:39 AM MDT	Special Weather Statement	LBF	Lincoln	51 min
Aug 14, 12:29 PM MDT	Special Weather Statement	LBF	Lincoln	46 min
Aug 14, 4:16 PM MDT	Special Weather Statement	LBF	Dawes	59 min
Aug 14, 4:21 PM MDT	Special Weather Statement	LBF	Sheridan	39 min
Aug 14, 4:28 PM MDT	Severe Thunderstorm Warning	LBF	Cherry, Sheridan	47 min
Aug 14, 4:56 PM MDT	Special Weather Statement	LBF	Sheridan	49 min
Aug 14, 5:01 PM MDT	Special Weather Statement	LBF	Sheridan	44 min
Aug 14, 5:06 PM MDT	Severe Thunderstorm Warning	LBF	Sheridan	39 min
Aug 14, 5:44 PM MDT	Special Weather Statement	LBF	Sheridan	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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.