Alert archive / Nebraska / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 128, NWS Cheyenne, WY

August 14, 2021Dawes County, Nebraska

NWS Cheyenne, WY issued this severe thunderstorm warning at Aug 14, 2021, 7:09 PM MDT for Dawes County, Nebraska. It was in force for 34 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 14, 2021, 7:09 PM MDT (01:09 UTC)
Expired: Aug 14, 2021, 7:43 PM MDT
In force: 34 min
Issued by: NWS Cheyenne, WY
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Dawes County, NE

The radar

The Rapid City radar (KUDX), 144 km from the middle of the area, began a volume at 01:11 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
Aug 14, 3:28 PM MDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Rapid City, SD (KUNR), launched 00:00Z, 1.2 hours before the alert went out and 137 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: 1137 J/kg
Mixed-layer CIN: -124 J/kg
Mixed-layer LCL: 2285 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 51 m²/s²
0-3 km storm-relative helicity: 140 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.5

Open this sounding in Storm Lab

The text

As transmitted.

062 
WUUS55 KCYS 150109
SVRCYS
NEC045-150200-
/O.NEW.KCYS.SV.W.0128.210815T0109Z-210815T0200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Cheyenne WY
709 PM MDT Sat Aug 14 2021

The National Weather Service in Cheyenne has issued a

* Severe Thunderstorm Warning for...
  Northern Dawes County in the Panhandle of Nebraska...

* Until 800 PM MDT.

* At 709 PM MDT, a severe thunderstorm was located 10 miles northwest
  of Chadron Airport, or 13 miles northwest of Chadron, moving south
  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...
  Chadron, Whitney Lake, Chadron Airport and Whitney. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

To report severe weather, contact your nearest law enforcement
agency. They will send your report to the National Weather Service
office in Cheyenne.

&&

LAT...LON 4275 10338 4300 10331 4300 10309 4280 10288
TIME...MOT...LOC 0109Z 343DEG 15KT 4296 10321 

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

$$

MD/GCC

1 follow-up statement

759 
WWUS55 KCYS 150143
SVSCYS

Severe Weather Statement
National Weather Service Cheyenne WY
743 PM MDT Sat Aug 14 2021

NEC045-150153-
/O.CAN.KCYS.SV.W.0128.000000T0000Z-210815T0200Z/
Dawes NE-
743 PM MDT Sat Aug 14 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN DAWES COUNTY IS
CANCELLED...
                
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 cancelled.

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

LAT...LON 4275 10338 4300 10331 4300 10309 4280 10288
TIME...MOT...LOC 0142Z 343DEG 15KT 4282 10315 

$$

MD/GCC

The office that day

Everything else NWS Cheyenne, WY issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 14, 6:21 PM MDT	Severe Thunderstorm Warning Considerable damage threat	CYS	Box Butte, Morrill	39 min
Aug 14, 6:29 PM MDT	Severe Thunderstorm Warning	CYS	Dawes	46 min
Aug 14, 7:34 PM MDT	Severe Thunderstorm Warning Considerable damage threat	CYS	Cheyenne, Kimball, Morrill	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.