Alert archive / Wyoming / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 101, NWS Cheyenne, WY

July 14, 2021Albany County, Wyoming

NWS Cheyenne, WY issued this severe thunderstorm warning at Jul 14, 2021, 6:17 PM MDT for Albany County, Wyoming. It was in force for 43 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 14, 2021, 6:17 PM MDT (00:17 UTC)
Expired: Jul 14, 2021, 7:00 PM MDT
In force: 43 min
Issued by: NWS Cheyenne, WY
Area: Storm-based polygon
Hail: 1.25 in
Wind: 50.0 mph

County Albany County, WY

The radar

The Cheyenne radar (KCYS), 101 km from the middle of the area, began a volume at 00:20 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

Riverton, WY (KRIW), launched 00:00Z, 0.3 hours before the alert went out and 269 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: 703 J/kg
Mixed-layer CIN: -72 J/kg
Mixed-layer LCL: 2288 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: -44 m²/s²
0-3 km storm-relative helicity: 82 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

As transmitted.

077 
WUUS55 KCYS 150017
SVRCYS
WYC001-150100-
/O.NEW.KCYS.SV.W.0101.210715T0017Z-210715T0100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Cheyenne WY
617 PM MDT Wed Jul 14 2021

The National Weather Service in Cheyenne has issued a

* Severe Thunderstorm Warning for...
  Central Albany County in southeastern Wyoming...

* Until 700 PM MDT.

* At 617 PM MDT, a severe thunderstorm was located 14 miles west of
  Bosler, or 22 miles northwest of Laramie, moving east at 10 mph.

  HAZARD...Half dollar size hail.

  SOURCE...Radar indicated.

  IMPACT...Damage to vehicles is expected.

* This severe thunderstorm will remain over mainly rural areas of
  central Albany County.

This includes Interstate 80 in Wyoming between mile markers 287 and
295.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4144 10597 4147 10601 4156 10599 4158 10593
      4157 10575 4141 10582
TIME...MOT...LOC 0017Z 271DEG 8KT 4150 10595 

HAIL...1.25IN
WIND...<50MPH
 
$$

Mokry

1 follow-up statement

466 
WWUS55 KCYS 150037
SVSCYS

Severe Weather Statement
National Weather Service Cheyenne WY
637 PM MDT Wed Jul 14 2021

WYC001-150100-
/O.CON.KCYS.SV.W.0101.000000T0000Z-210715T0100Z/
Albany WY-
637 PM MDT Wed Jul 14 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM MDT
FOR CENTRAL ALBANY COUNTY...

At 637 PM MDT, a severe thunderstorm was located 11 miles southwest
of Bosler, or 20 miles northwest of Laramie, moving east at 10 mph.

HAZARD...Ping pong ball size hail.

SOURCE...Radar indicated.

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

This severe thunderstorm will remain over mainly rural areas of
central Albany County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4149 10581 4155 10589 4158 10588 4157 10575
      4147 10579
TIME...MOT...LOC 0037Z 271DEG 8KT 4150 10589 

HAIL...1.50IN
WIND...<50MPH
 
$$

Mokry

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 14, 6:03 PM MDT	Special Weather Statement	CYS	Albany	27 min
Jul 14, 6:19 PM MDT	Special Weather Statement	CYS	Albany	26 min
Jul 14, 6:34 PM MDT	Severe Thunderstorm Warning	CYS	Albany	26 min
Jul 14, 6:59 PM MDT	Severe Thunderstorm Warning	CYS	Albany	46 min
Jul 14, 7:13 PM MDT	Special Weather Statement	CYS	Carbon	32 min
Jul 14, 7:45 PM MDT	Special Weather Statement	CYS	Carbon	45 min
Jul 14, 7:53 PM MDT	Special Weather Statement	CYS	Albany	37 min
Jul 14, 8:48 PM MDT	Special Weather Statement	CYS	Carbon	27 min
Jul 14, 8:51 PM MDT	Severe Thunderstorm Warning	CYS	Carbon	24 min
Jul 15, 3:55 PM MDT	Special Weather Statement	CYS	Laramie	35 min
Jul 15, 4:22 PM MDT	Severe Thunderstorm Warning	CYS	Laramie	38 min
Jul 15, 4:42 PM MDT	Areal Flood Advisory	CYS	Laramie	3 hr
Jul 15, 4:59 PM MDT	Special Weather Statement	CYS	Laramie	46 min
Jul 15, 5:00 PM MDT	Special Weather Statement	CYS	Laramie	15 min
Jul 15, 5:33 PM MDT	Special Weather Statement	CYS	Laramie	12 min
Jul 15, 5:46 PM MDT	Special Weather Statement	CYS	Laramie	29 min

Nearby

Severe Thunderstorm Warnings in Wyoming, 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.