Alert archive / Nebraska / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 120, NWS North Platte, NE

August 14, 2021Chase County, Hayes County, Perkins County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Aug 14, 2021, 7:44 AM MDT for Chase County, Hayes County, Perkins County, Nebraska. It was in force for 31 min. 2 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: Aug 14, 2021, 7:44 AM MDT (13:44 UTC)
Expired: Aug 14, 2021, 8:15 AM MDT
In force: 31 min
Issued by: NWS North Platte, NE
Area: Storm-based polygon
Hail: 1.25 in
Wind: 50.0 mph

Counties Chase County, NE, Hayes County, NE, Perkins County, NE

The radar

The North Platte radar (KLNX), 150 km from the middle of the area, began a volume at 13:46 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, 8:06 AM MDT	HAIL 1.25	6 S Elsie, NE	SIZE RANGED FROM NICKEL TO HALF DOLLAR. NO SIGNIFICANT WIND. TIME ESTIMATED FROM RADAR.
Aug 14, 8:12 AM MDT	HAIL 1.75	8 S Elsie, NE	DELAYED REPORT. TIME ESTIMATED FROM RADAR.

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 12:00Z, 1.7 hours before the alert went out and 80 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: 993 J/kg
Mixed-layer CIN: -86 J/kg
Mixed-layer LCL: 948 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 20 m²/s²
0-3 km storm-relative helicity: 83 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.9

Open this sounding in Storm Lab

The text

As transmitted.

782 
WUUS53 KLBF 141344
SVRLBF
NEC029-085-135-141415-
/O.NEW.KLBF.SV.W.0120.210814T1344Z-210814T1415Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service North Platte NE
844 AM CDT Sat Aug 14 2021

The National Weather Service in North Platte has issued a

* Severe Thunderstorm Warning for...
  Southeastern Perkins County in southwestern Nebraska...
  Northeastern Chase County in southwestern Nebraska...
  Northwestern Hayes County in southwestern Nebraska...

* Until 915 AM CDT/815 AM MDT/.

* At 843 AM CDT/743 AM MDT/, a severe thunderstorm was located near
  Elsie, or 13 miles east of Grant, moving southeast at 15 mph.

  HAZARD...Half dollar size hail.

  SOURCE...Radar indicated.

  IMPACT...Damage to vehicles is expected.

* Locations impacted include...
  Elsie and Grainton. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4079 10156 4088 10151 4081 10124 4070 10125
      4059 10135
TIME...MOT...LOC 1343Z 294DEG 15KT 4081 10146 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.25 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...<50 MPH

$$

Snively

1 follow-up statement

017 
WWUS53 KLBF 141400
SVSLBF

Severe Weather Statement
National Weather Service North Platte NE
900 AM CDT Sat Aug 14 2021

NEC029-085-135-141415-
/O.CON.KLBF.SV.W.0120.000000T0000Z-210814T1415Z/
Perkins NE-Chase NE-Hayes NE-
900 AM CDT Sat Aug 14 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 AM
CDT/815 AM MDT/ FOR SOUTHEASTERN PERKINS...NORTHEASTERN CHASE AND
NORTHWESTERN HAYES COUNTIES...

At 859 AM CDT/759 AM MDT/, a severe thunderstorm was located about 5 
miles south of Elsie, or 17 miles east of Grant, moving southeast at 
20 mph.

HAZARD...Quarter size hail.

SOURCE...Radar indicated.

IMPACT...Damage to vehicles is expected.

This severe thunderstorm will remain over mainly rural areas of
southeastern Perkins, northeastern Chase and northwestern Hayes
Counties.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4076 10151 4085 10147 4081 10124 4070 10125
      4059 10135
TIME...MOT...LOC 1359Z 324DEG 18KT 4076 10142 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...<50 MPH

$$

Snively

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, 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, 4:26 PM MDT	Severe Thunderstorm Warning	LBF	Sheridan	49 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.