Alert archive / Nebraska / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 108, NWS Cheyenne, WY

July 16, 2021Dawes County, Nebraska

NWS Cheyenne, WY issued this severe thunderstorm warning at Jul 16, 2021, 7:10 PM MDT for Dawes County, Nebraska. It was in force for 35 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: Jul 16, 2021, 7:10 PM MDT (01:10 UTC)
Expired: Jul 16, 2021, 7:45 PM MDT
In force: 35 min
Issued by: NWS Cheyenne, WY
Area: Storm-based polygon
Hail: 1.25 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 01:13 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
Jul 16, 7:20 PM MDT	TSTM WND GST 60	7 Ese Chadron, NE
Jul 16, 7:28 PM MDT	HAIL 0.5	6 E Chadron, 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
Jul 16, 3:55 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 138 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 3551 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 73 m²/s²
0-3 km storm-relative helicity: 211 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

687 
WUUS55 KCYS 170110
SVRCYS
NEC045-170145-
/O.NEW.KCYS.SV.W.0108.210717T0110Z-210717T0145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Cheyenne WY
710 PM MDT Fri Jul 16 2021

The National Weather Service in Cheyenne has issued a

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

* Until 745 PM MDT.

* At 710 PM MDT, a severe thunderstorm was located 10 miles east of
  Chadron, moving east at 30 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.

* This severe thunderstorm will remain over mainly rural areas of
  northeastern Dawes County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4274 10289 4284 10298 4294 10294 4297 10286
      4296 10279 4279 10279 4278 10277 4271 10278
TIME...MOT...LOC 0110Z 285DEG 28KT 4285 10279 

HAIL...1.25IN
WIND...60MPH
 
$$

Mokry

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 16, 6:59 PM MDT	Special Weather Statement	CYS	Dawes	31 min
Jul 16, 7:33 PM MDT	Severe Thunderstorm Warning	CYS	Box Butte, Dawes	42 min
Jul 16, 9:31 PM MDT	Special Weather Statement	CYS	Box Butte	44 min
Jul 17, 4:20 PM MDT	Special Weather Statement	CYS	Sioux	40 min
Jul 17, 4:59 PM MDT	Special Weather Statement	CYS	Sioux	31 min
Jul 17, 5:03 PM MDT	Special Weather Statement	CYS	Kimball	27 min
Jul 17, 5:29 PM MDT	Special Weather Statement	CYS	Kimball	31 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.