Alert archive / Wyoming / Severe Thunderstorm Warnings in 2025

Severe Thunderstorm Warning 71, NWS Cheyenne, WY

June 13, 2025Albany County, Converse County, Platte County, Wyoming

NWS Cheyenne, WY issued this severe thunderstorm warning at Jun 13, 2025, 2:32 PM MDT for Albany County, Converse County, Platte 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 counties it named.

The facts

Issued: Jun 13, 2025, 2:32 PM MDT (20:32 UTC)
Expired: Jun 13, 2025, 3:15 PM MDT
In force: 43 min
Issued by: NWS Cheyenne, WY
Area: Storm-based polygon
Tornado: Possible
Hail: 1.0 in
Wind: 60.0 mph

Counties Albany County, WY, Converse County, WY, Platte County, WY

The radar

The Cheyenne radar (KCYS), 132 km from the middle of the area, began a volume at 20:32 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 13, 1:56 PM MDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Riverton, WY (KRIW), launched 12:00Z, 8.5 hours before the alert went out and 262 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: 215 J/kg
Mixed-layer CIN: -234 J/kg
Mixed-layer LCL: 1418 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 140 m²/s²
0-3 km storm-relative helicity: 195 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Cheyenne, WY wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 13, 11:52 AM MDT, 2 hours 40 minutes earlier.

Area forecast discussion, Jun 13, 11:52 AM MDT, 2 hours 40 minutes before

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Hazardous weather outlook, Jun 13, 12:14 AM MDT, 14 hours 18 minutes before

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In the hours before

Special weather statement, Jun 13, 12:52 PM MDT, 1 hour 40 minutes before

Special Weather Statement
National Weather Service Cheyenne WY
1252 PM MDT Fri Jun 13 2025

WYZ116>118-131945-
South Laramie Range WY-Central Laramie County WY-
South Laramie Range Foothills WY-
1252 PM MDT Fri Jun 13 2025

...GUSTY SHOWERS WILL IMPACT SOUTHEASTERN ALBANY AND SOUTHWESTERN
LARAMIE COUNTIES THROUGH 145 PM MDT...

At 1252 PM MDT, Doppler radar was tracking gusty showers over Granite
Canon, or 20 miles west of Cheyenne, moving northeast at 15 mph.

HAZARD...Wind gusts of 50 to 55 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Happy Valley, Federal, Table Mountain Ranches, Rocking Star Ranch,
Willadsen Estates, Silver Sage Estates, Granite Canon, Crystal Lake
Reservoir, Buford, Granite Springs Reservoir, Curt Gowdy State Park,
Pine Grove Estates, Granite Springs Retreat, Ranchettes, and Cheyenne
Pass.

This includes Interstate 80 in Wyoming between mile markers 333 and
357.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4101 10516 4111 10538 4131 10521 4130 10490
      4108 10488
TIME...MOT...LOC 1852Z 233DEG 15KT 4113 10519

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...55 MPH

Natoli

Special weather statement, Jun 13, 12:55 PM MDT, 1 hour 37 minutes before

Special Weather Statement
National Weather Service Cheyenne WY
1255 PM MDT Fri Jun 13 2025

WYZ105-109-110-114-115-131945-
Shirley Basin WY-North Snowy Range Foothills WY-
Central Carbon County WY-Laramie Valley WY-Snowy Range WY-
1255 PM MDT Fri Jun 13 2025

...GUSTY SHOWERS WILL IMPACT EAST CENTRAL CARBON AND WEST CENTRAL
ALBANY COUNTIES THROUGH 145 PM MDT...

At 1254 PM MDT, Doppler radar was tracking gusty showers near Elk
Mountain, or 45 miles northwest of Laramie, moving northeast at 20
mph.

HAZARD...Wind gusts of 50 to 55 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Medicine Bow, Rock River, Elk Mountain, Nash Fork Campground,
Brooklyn Lake, Brooklyn Lake Campground, McFadden, Deep Creek
Campground, North Fork Campground, and Arlington.

This includes Interstate 80 in Wyoming between mile markers 250 and
291.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4156 10631 4171 10658 4191 10645 4187 10597
      4160 10585 4135 10595 4134 10627
TIME...MOT...LOC 1854Z 229DEG 17KT 4168 10632

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...55 MPH

Natoli

Special weather statement, Jun 13, 1:48 PM MDT, 44 minutes before

Special Weather Statement
National Weather Service Cheyenne WY
148 PM MDT Fri Jun 13 2025

WYZ103>106-132030-
Shirley Basin WY-
Central Laramie Range and Southwest Platte County WY-
North Laramie Range WY-Ferris/Seminoe/Shirley Mountains WY-
148 PM MDT Fri Jun 13 2025

...GUSTY SHOWERS WILL IMPACT NORTHEASTERN CARBON...NORTHEASTERN
ALBANY AND SOUTHWESTERN CONVERSE COUNTIES THROUGH 230 PM MDT...

At 147 PM MDT, Doppler radar was tracking gusty showers along a line
extending from 8 miles northeast of Prior Flat Campground to 8 miles
east of Battle Mountain to 7 miles northwest of Wheatland Reservoir
Number 3. Movement was east at 45 mph.

HAZARD...Wind gusts of 50 to 55 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Shirley Basin, Prior Flat Campground, Windy Peak, Wheatland Reservoir
Number 3, Garrett, Dome Rock, Friend Park Campground, and Campbell
Creek Campground.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4206 10618 4232 10683 4243 10683 4243 10608
      4260 10607 4231 10547 4190 10530 4184 10590
TIME...MOT...LOC 1947Z 258DEG 38KT 4230 10644 4214 10605 4193 10584

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...55 MPH

Natoli

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 12, 6:05 PM MDT	Severe Thunderstorm Warning	CYS	Albany	40 min
Jun 12, 6:29 PM MDT	Severe Thunderstorm Warning	CYS	Goshen, Platte	46 min
Jun 12, 6:31 PM MDT	Severe Thunderstorm Warning	CYS	Converse, Niobrara, Platte	30 min
Jun 12, 7:08 PM MDT	Severe Thunderstorm Warning Considerable damage threat	CYS	Niobrara	52 min
Jun 12, 7:57 PM MDT	Severe Thunderstorm Warning Considerable damage threat	CYS	Niobrara	33 min
Jun 13, 12:52 PM MDT	Special Weather Statement	CYS	Laramie	53 min
Jun 13, 12:55 PM MDT	Special Weather Statement	CYS	Albany	50 min
Jun 13, 1:48 PM MDT	Special Weather Statement	CYS		42 min
Jun 13, 2:38 PM MDT	Severe Thunderstorm Warning	CYS	Albany, Converse	37 min
Jun 13, 3:05 PM MDT	Severe Thunderstorm Warning	CYS	Converse, Niobrara, Platte	55 min
Jun 13, 3:28 PM MDT	Severe Thunderstorm Warning	CYS	Converse, Niobrara	47 min
Jun 13, 3:59 PM MDT	Severe Thunderstorm Warning	CYS	Converse, Goshen, Niobrara, Platte	28 min
Jun 13, 4:09 PM MDT	Severe Thunderstorm Warning	CYS	Converse	51 min
Jun 13, 4:43 PM MDT	Severe Thunderstorm Warning	CYS	Converse, Niobrara	47 min
Jun 13, 4:48 PM MDT	Severe Thunderstorm Warning	CYS	Niobrara	72 min
Jun 12, 6:32 PM MDT	Severe Thunderstorm Warning	CYS	Cheyenne	43 min
Jun 12, 6:54 PM MDT	Special Weather Statement	CYS	Box Butte	36 min
Jun 13, 4:22 PM MDT	Severe Thunderstorm Warning	CYS	Box Butte, Morrill, Scotts Bluff, Sioux	53 min
Jun 13, 5:00 PM MDT	Severe Thunderstorm Warning	CYS	Banner, Box Butte, Morrill, Scotts Bluff	45 min
Jun 13, 5:16 PM MDT	Severe Thunderstorm Warning	CYS	Box Butte, Dawes, Morrill, Scotts Bluff, Sioux	59 min
Jun 13, 5:44 PM MDT	Severe Thunderstorm Warning	CYS	Box Butte, Morrill	61 min
Jun 13, 5:51 PM MDT	Severe Thunderstorm Warning	CYS	Cheyenne, Kimball, Morrill	54 min

Nearby

Severe Thunderstorm Warnings in Wyoming, 2025 Every severe thunderstorm warning in 2025

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.