Alert archive / Nebraska / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 135, NWS Cheyenne, WY

September 1, 2021Banner County, Morrill County, Scotts Bluff County, Nebraska

NWS Cheyenne, WY issued this severe thunderstorm warning at Sep 1, 2021, 4:49 PM MDT for Banner County, Morrill County, Scotts Bluff County, Nebraska. It was in force for 41 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: Sep 1, 2021, 4:49 PM MDT (22:49 UTC)
Expired: Sep 1, 2021, 5:30 PM MDT
In force: 41 min
Issued by: NWS Cheyenne, WY
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

Counties Banner County, NE, Morrill County, NE, Scotts Bluff County, NE

The radar

The Cheyenne radar (KCYS), 141 km from the middle of the area, began a volume at 22:54 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
Sep 1, 5:05 PM MDT	HAIL 1.75	7 W Bridgeport, NE	RECEIVED REPORTS OF CRACKED WINDSHIELDS DUE TO HAIL ALONG HIGHWAY 26 BETWEEN BRIDGEPORT AND SCOTTSBLUFF. TIME ESTIMATED BASED ON RADAR.
Sep 1, 5:10 PM MDT	HAIL 2	6 W Bridgeport, NE
Sep 1, 5:15 PM MDT	HAIL 1.75	6 E Bayard, NE	RECEIVED REPORTS AND PHOTOS OF CRACKED WINDSHIELDS EAST OF BAYARD.

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

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 10.8 hours before the alert went out and 200 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: 3028 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 18 m²/s²
0-3 km storm-relative helicity: -11 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

952 
WUUS55 KCYS 012249
SVRCYS
NEC007-123-157-012330-
/O.NEW.KCYS.SV.W.0135.210901T2249Z-210901T2330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Cheyenne WY
449 PM MDT Wed Sep 1 2021

The National Weather Service in Cheyenne has issued a

* Severe Thunderstorm Warning for...
  East central Scotts Bluff County in the Panhandle of Nebraska...
  Western Morrill County in the Panhandle of Nebraska...
  Northeastern Banner County in the Panhandle of Nebraska...

* Until 530 PM MDT.

* At 449 PM MDT, a severe thunderstorm was located near Redington, or
  25 miles southeast of Scottsbluff, moving north at 20 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...
  Bayard, Moomaws Corner, Chimney Rock State Park, Redington, The
  Intersection Of Highway 385 And L62 and South Bayard Junction.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4153 10319 4153 10332 4161 10337 4189 10341
      4191 10312
TIME...MOT...LOC 2249Z 178DEG 20KT 4164 10328 

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

$$

Mokry

2 follow-up statements

930 
WWUS55 KCYS 012254
SVSCYS

Severe Weather Statement
National Weather Service Cheyenne WY
454 PM MDT Wed Sep 1 2021

NEC007-012304-
/O.CAN.KCYS.SV.W.0135.000000T0000Z-210901T2330Z/
Banner NE-
454 PM MDT Wed Sep 1 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN BANNER COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 4153 10319 4155 10331 4161 10335 4189 10341
      4191 10312
TIME...MOT...LOC 2254Z 178DEG 20KT 4167 10328 

$$

NEC123-157-012330-
/O.CON.KCYS.SV.W.0135.000000T0000Z-210901T2330Z/
Scotts Bluff NE-Morrill NE-
454 PM MDT Wed Sep 1 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM MDT
FOR EAST CENTRAL SCOTTS BLUFF AND WESTERN MORRILL COUNTIES...

At 454 PM MDT, a severe thunderstorm was located near South Bayard
Junction, or 23 miles southeast of Scottsbluff, moving north at 25
mph.

HAZARD...Tennis ball size hail and 60 mph wind gusts.

SOURCE...Radar indicated.

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.

Locations impacted include...
Bayard, Moomaws Corner, Chimney Rock State Park, Redington, The
Intersection Of Highway 385 And L62 and South Bayard Junction.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4153 10319 4155 10331 4161 10335 4189 10341
      4191 10312
TIME...MOT...LOC 2254Z 178DEG 20KT 4167 10328 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...2.50 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Mokry

474 
WWUS55 KCYS 012302
SVSCYS

Severe Weather Statement
National Weather Service Cheyenne WY
502 PM MDT Wed Sep 1 2021

NEC123-157-012330-
/O.CON.KCYS.SV.W.0135.000000T0000Z-210901T2330Z/
Scotts Bluff NE-Morrill NE-
502 PM MDT Wed Sep 1 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM MDT
FOR EAST CENTRAL SCOTTS BLUFF AND WESTERN MORRILL COUNTIES...

At 502 PM MDT, a severe thunderstorm was located over South Bayard
Junction, or 22 miles southeast of Scottsbluff, moving north at 25
mph.

THIS IS A DESTRUCTIVE STORM.

HAZARD...Baseball size hail and 60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...People and animals outdoors will be severely injured. 
         Expect shattered windows, extensive damage to roofs, 
         siding, and vehicles.

Locations impacted include...
Bayard, Moomaws Corner, Chimney Rock State Park, Redington, The
Intersection Of Highway 385 And L62 and South Bayard Junction.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4153 10319 4155 10331 4161 10335 4189 10341
      4191 10312
TIME...MOT...LOC 2302Z 178DEG 20KT 4172 10328 

THUNDERSTORM DAMAGE THREAT...DESTRUCTIVE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...2.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Mokry

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 1, 4:38 PM MDT	Special Weather Statement	CYS	Morrill	37 min
Sep 1, 5:06 PM MDT	Severe Thunderstorm Warning Destructive damage threat	CYS	Morrill	39 min
Sep 1, 5:45 PM MDT	Special Weather Statement	CYS	Box Butte	30 min
Sep 1, 5:49 PM MDT	Severe Thunderstorm Warning	CYS	Box Butte, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.