Alert archive / Wyoming / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 103, NWS Cheyenne, WY

July 14, 2021Albany County, Wyoming

NWS Cheyenne, WY issued this severe thunderstorm warning at Jul 14, 2021, 6:59 PM MDT for Albany County, Wyoming. It was in force for 46 min. 1 report 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 14, 2021, 6:59 PM MDT (00:59 UTC)
Expired: Jul 14, 2021, 7:45 PM MDT
In force: 46 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), 92 km from the middle of the area, began a volume at 01:03 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 14, 7:40 PM MDT	HAIL 2	5 Nw Bosler, WY	HAIL SIZES RANGED FROM QUARTERS TO EGGS.

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

The nearest sounding before it

Riverton, WY (KRIW), launched 00:00Z, 1.0 hours before the alert went out and 273 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.

727 
WUUS55 KCYS 150059
SVRCYS
WYC001-150145-
/O.NEW.KCYS.SV.W.0103.210715T0059Z-210715T0145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Cheyenne WY
659 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 745 PM MDT.

* At 659 PM MDT, a severe thunderstorm was located near Bosler, or 23
  miles north of Laramie, moving northeast at 15 mph.

  HAZARD...Half dollar size hail.

  SOURCE...Radar indicated.

  IMPACT...Damage to vehicles is expected.

* Locations impacted include...
  Bosler.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4156 10562 4154 10572 4161 10580 4166 10582
      4176 10580 4178 10566 4171 10544
TIME...MOT...LOC 0059Z 225DEG 13KT 4163 10571 

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

Mokry

1 follow-up statement

511 
WWUS55 KCYS 150115
SVSCYS

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

WYC001-150145-
/O.CON.KCYS.SV.W.0103.000000T0000Z-210715T0145Z/
Albany WY-
715 PM MDT Wed Jul 14 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM MDT
FOR EAST CENTRAL ALBANY COUNTY...

At 714 PM MDT, a severe thunderstorm was located near Bosler, or 25
miles north of Laramie, moving northeast at 15 mph.

HAZARD...Quarter size hail.

SOURCE...Radar indicated.

IMPACT...Damage to vehicles is expected.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4158 10559 4159 10566 4163 10572 4166 10576
      4177 10575 4178 10566 4171 10544
TIME...MOT...LOC 0114Z 225DEG 13KT 4167 10566 

HAIL...1.00IN
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, 6:17 PM MDT	Severe Thunderstorm Warning	CYS	Albany	43 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, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.