Alert archive / Nebraska / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 113, NWS Cheyenne, WY

August 26, 2017Dawes County, Nebraska

NWS Cheyenne, WY issued this severe thunderstorm warning at Aug 26, 2017, 3:58 PM MDT for Dawes County, Nebraska. It was in force for 62 min. 3 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 26, 2017, 3:58 PM MDT (21:58 UTC)
Expired: Aug 26, 2017, 5:00 PM MDT
In force: 62 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), 158 km from the middle of the area, began a volume at 21:59 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
Aug 26, 4:09 PM MDT	HAIL 1	3 Sw Chadron, NE
Aug 26, 4:09 PM MDT	HAIL 1	4 Sw Chadron, NE
Aug 26, 4:44 PM MDT	HAIL 2	12 S 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
Aug 26, 2:04 PM MDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Rapid City, SD (KRAP), launched 12:00Z, 10.0 hours before the alert went out and 151 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: 69 J/kg
Mixed-layer CIN: -227 J/kg
Mixed-layer LCL: 2080 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 55 m²/s²
0-3 km storm-relative helicity: 110 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

354 
WUUS55 KCYS 262158
SVRCYS
NEC045-262300-
/O.NEW.KCYS.SV.W.0113.170826T2158Z-170826T2300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Cheyenne WY
358 PM MDT SAT AUG 26 2017

The National Weather Service in Cheyenne has issued a

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

* Until 500 PM MDT

* At 357 PM MDT, a severe thunderstorm was located over Chadron
  Airport, or near Chadron, moving southeast at 20 mph.

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

  SOURCE...Radar indicated. At 348 PM MDT...1.25 inch diameter hail 
           was reported 4 miles north of Chadron. 

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

* This severe thunderstorm will be near, 
  Chadron around 405 PM MDT. 
  Chadron Campground around 430 PM MDT. 
  Red Cloud Campground around 435 PM MDT. 

Other locations impacted by this severe thunderstorm include Chadron
St Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4252 10318 4290 10318 4294 10304 4273 10277
      4267 10277
TIME...MOT...LOC 2157Z 335DEG 16KT 4285 10310 

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

Rubin

3 follow-up statements

455 
WWUS55 KCYS 262223
SVSCYS

Severe Weather Statement
National Weather Service Cheyenne WY
423 PM MDT SAT AUG 26 2017

NEC045-262300-
/O.CON.KCYS.SV.W.0113.000000T0000Z-170826T2300Z/
Dawes NE-
423 PM MDT SAT AUG 26 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM MDT
FOR SOUTHEASTERN DAWES COUNTY...

At 423 PM MDT, a severe thunderstorm was located near Chadron
Campground, or near Chadron, moving southeast at 15 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. 

This severe storm will be near...
  Chadron Campground around 435 PM MDT. 
  Red Cloud Campground around 440 PM MDT. 

Other locations impacted by this severe thunderstorm include Chadron
St Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4252 10318 4281 10310 4282 10289 4273 10277
      4267 10277
TIME...MOT...LOC 2223Z 332DEG 13KT 4276 10304 

HAIL...1.00IN
WIND...60MPH
 
$$

Rubin

859 
WWUS55 KCYS 262251
SVSCYS

Severe Weather Statement
National Weather Service Cheyenne WY
451 PM MDT SAT AUG 26 2017

NEC045-262300-
/O.CON.KCYS.SV.W.0113.000000T0000Z-170826T2300Z/
Dawes NE-
451 PM MDT SAT AUG 26 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM MDT
FOR SOUTHEASTERN DAWES COUNTY...

At 450 PM MDT, a severe thunderstorm was located near Red Cloud
Campground, or 13 miles south of Chadron, moving south at 20 mph.

HAZARD...Two inch hail and 60 mph wind gusts. 

SOURCE...Radar indicated. At 444 pm MDT, 2 inch diameter hail was 
         reported 12 miles south of Chadron on highway 385. 

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect wind 
         damage to roofs, siding, and trees. 

This severe thunderstorm will remain over mainly rural areas of 
southeastern Dawes County, including the following locations: 
Chadron St Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4255 10309 4268 10307 4270 10296 4267 10288
      4264 10284
TIME...MOT...LOC 2250Z 343DEG 17KT 4263 10300 

HAIL...2.00IN
WIND...60MPH
 
$$

Rubin

510 
WWUS55 KCYS 262255
SVSCYS

Severe Weather Statement
National Weather Service Cheyenne WY
455 PM MDT SAT AUG 26 2017

NEC045-262304-
/O.EXP.KCYS.SV.W.0113.000000T0000Z-170826T2300Z/
Dawes NE-
455 PM MDT SAT AUG 26 2017

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN DAWES COUNTY WILL
EXPIRE AT 500 PM MDT...
        
The storm which prompted the warning has moved out of the area.
Therefore the warning will be allowed to expire.

A severe thunderstorm watch remains in effect until 1000 PM MDT for
Dawes, Box Butte and Morrill Counties in the Panhandle of Nebraska.

Remember, a Severe Thunderstorm Warning still remains in effect for 
Northeastern Box Butte County and Southeastern Dawes County in the 
Panhandle of Nebraska until 600 pm MDT.

LAT...LON 4255 10309 4268 10307 4270 10296 4267 10288
      4264 10284
TIME...MOT...LOC 2254Z 335DEG 16KT 4262 10300 

$$

Rubin

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 26, 3:24 PM MDT	Special Weather Statement	CYS	Dawes	51 min
Aug 26, 3:30 PM MDT	Tornado Warning	CYS	Dawes	30 min
Aug 26, 4:14 PM MDT	Special Weather Statement	CYS	Box Butte	46 min
Aug 26, 4:54 PM MDT	Severe Thunderstorm Warning	CYS	Box Butte, Dawes	66 min
Aug 26, 5:59 PM MDT	Severe Thunderstorm Warning	CYS	Box Butte	28 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2017 Every severe thunderstorm warning in 2017

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.