Alert archive / Nebraska / Special Weather Statements in 2021

Special Weather Statement, NWS Cheyenne, WY

July 3, 2021Cheyenne County, Nebraska

NWS Cheyenne, WY issued this special weather statement at Jul 3, 2021, 5:21 PM MDT for Cheyenne County, Nebraska. It was in force for 39 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: Jul 3, 2021, 5:21 PM MDT (23:21 UTC)
Expired: Jul 3, 2021, 6:00 PM MDT
In force: 39 min
Issued by: NWS Cheyenne, WY

County Cheyenne County, NE

The radar

The Cheyenne radar (KCYS), 171 km from the middle of the area, began a volume at 23:23 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 nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 11.4 hours before the alert went out and 143 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: 2605 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 26 m²/s²
0-3 km storm-relative helicity: 31 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

820 
WWUS85 KCYS 032321
SPSCYS

Special Weather Statement
National Weather Service Cheyenne WY
521 PM MDT Sat Jul 3 2021
 
NEZ055-040000-
Cheyenne NE-
521 PM MDT Sat Jul 3 2021

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN CHEYENNE COUNTY
UNTIL 600 PM MDT...

At 521 PM MDT, Doppler radar was tracking a strong thunderstorm 7
miles south of Colton, or 9 miles southeast of Sidney, moving north
at 20 mph.

Nickel size hail and wind gusts of 50 to 55 mph will be possible with
this storm.

This strong thunderstorm will be near...
  Colton and Sunol around 545 PM MDT.

This includes Interstate 80 in Nebraska between mile markers 58 and
77.
 
A Severe Thunderstorm Watch remains in effect until 1000 PM MDT for
the Panhandle of Nebraska.

LAT...LON 4100 10268 4100 10293 4128 10311 4126 10261
      4110 10261
TIME...MOT...LOC 2321Z 187DEG 17KT 4104 10283 

$$

Rubin

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 2, 6:22 PM MDT	Special Weather Statement	CYS		38 min
Jul 2, 6:30 PM MDT	Severe Thunderstorm Warning	CYS	Niobrara	30 min
Jul 2, 6:44 PM MDT	Special Weather Statement	CYS	Platte	46 min
Jul 2, 7:00 PM MDT	Severe Thunderstorm Warning	CYS	Goshen, Niobrara, Platte	60 min
Jul 2, 7:05 PM MDT	Special Weather Statement	CYS	Niobrara	40 min
Jul 2, 7:47 PM MDT	Severe Thunderstorm Warning	CYS	Goshen	36 min
Jul 3, 12:27 PM MDT	Special Weather Statement	CYS	Platte	48 min
Jul 3, 12:35 PM MDT	Special Weather Statement	CYS	Laramie	40 min
Jul 3, 1:47 PM MDT	Special Weather Statement	CYS	Laramie	43 min
Jul 3, 2:42 PM MDT	Special Weather Statement	CYS	Goshen	48 min
Jul 3, 3:01 PM MDT	Severe Thunderstorm Warning	CYS	Goshen	30 min
Jul 3, 3:06 PM MDT	Special Weather Statement	CYS	Box Butte	39 min
Jul 3, 3:42 PM MDT	Special Weather Statement	CYS	Kimball	48 min
Jul 3, 3:48 PM MDT	Severe Thunderstorm Warning	CYS	Kimball	31 min
Jul 3, 3:51 PM MDT	Special Weather Statement	CYS	Banner	39 min
Jul 3, 3:57 PM MDT	Special Weather Statement	CYS	Cheyenne	48 min
Jul 3, 4:18 PM MDT	Severe Thunderstorm Warning	CYS	Cheyenne	57 min
Jul 3, 4:43 PM MDT	Special Weather Statement	CYS	Cheyenne	47 min
Jul 3, 4:43 PM MDT	Severe Thunderstorm Warning	CYS	Dawes	47 min
Jul 3, 4:46 PM MDT	Severe Thunderstorm Warning	CYS	Box Butte, Dawes, Sioux	28 min
Jul 3, 5:03 PM MDT	Special Weather Statement	CYS	Morrill	42 min
Jul 3, 5:15 PM MDT	Special Weather Statement	CYS	Dawes	30 min
Jul 3, 5:29 PM MDT	Special Weather Statement	CYS	Dawes	31 min
Jul 3, 5:40 PM MDT	Special Weather Statement	CYS	Morrill	50 min

Nearby

Special Weather Statements in Nebraska, 2021 Every special weather statement 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.