Severe Thunderstorm Warning 240, NWS Cheyenne, WY

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Hazardous Weather Outlook
National Weather Service Cheyenne WY
241 PM MDT Fri Jul 18 2025

NEZ002-003-019>021-054-055-095-096-WYZ101>119-192045-
Dawes County-Box Butte County-Scotts Bluff County-Banner County-
Morrill County-Kimball County-Cheyenne County-
Northern Sioux County-Southern Sioux County-
Converse County Lower Elevations-Niobrara County-
North Laramie Range-Ferris/Seminoe/Shirley Mountains-
Shirley Basin-Central Laramie Range and Southwest Platte County-
East Platte County-Goshen County-Central Carbon County-
North Snowy Range Foothills-Southwest Carbon County-
Sierra Madre Range-Upper North Platte River Basin-Snowy Range-
Laramie Valley-South Laramie Range-South Laramie Range Foothills-
Central Laramie County-East Laramie County-
241 PM MDT Fri Jul 18 2025

This hazardous weather outlook is for portions of panhandle
Nebraska...east central Wyoming...south central Wyoming and
southeast Wyoming.

.DAY ONE...THIS AFTERNOON AND TONIGHT

Scattered thunderstorms will move eastward in the Wyoming high
plains as well as the Nebraska panhandle. Isolated pea to penny
sized hail and gusty winds to near 60 mph are the primary threats
through 8pm. Please report any severe weather to the NWS.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

A better chance of thunderstorms will exist on Saturday with
storms moving eastward in the Wyoming high plains as well as the
Nebraska panhandle. Hail up to quarter size and gusty winds to
near 60 mph are the primary threats through 9pm, mainly in the
Nebraska panhandle.

.Spotter information statement...
Please report any severe weather to the NWS.

Special Weather Statement
National Weather Service Cheyenne WY
344 PM MDT Fri Jul 18 2025

WYZ103-106-107-182215-
East Platte County WY-
Central Laramie Range and Southwest Platte County WY-
North Laramie Range WY-
344 PM MDT Fri Jul 18 2025

...A STRONG THUNDERSTORM WILL IMPACT NORTHERN PLATTE COUNTY THROUGH
415 PM MDT...

At 343 PM MDT, Doppler radar was tracking a strong thunderstorm 7
miles northwest of Dwyer Junction, or 19 miles north of Wheatland,
moving east at 30 mph.

HAZARD...Wind gusts up to 50 mph and half inch hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor hail damage to vegetation is
         possible.

Locations impacted include...
Guernsey, Hartville, Oregon Trail Ruts State Historic Site, Dwyer
Junction, Sandy Cove Campground, Guernsey State Park, and Cassa.

This includes Interstate 25 in Wyoming between mile markers 90 and
106.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4222 10518 4240 10520 4247 10473 4216 10473
TIME...MOT...LOC 2143Z 266DEG 25KT 4232 10509

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...50 MPH

Trudel

Special Weather Statement
National Weather Service Cheyenne WY
435 PM MDT Fri Jul 18 2025

WYZ107-108-182315-
East Platte County WY-Goshen County WY-
435 PM MDT Fri Jul 18 2025

...A STRONG THUNDERSTORM WILL IMPACT WEST CENTRAL GOSHEN AND EAST
CENTRAL PLATTE COUNTIES THROUGH 515 PM MDT...

At 434 PM MDT, Doppler radar was tracking a strong thunderstorm over
Oregon Trail Ruts State Historic Site, or 15 miles northeast of
Wheatland, moving east at 25 mph.

HAZARD...Wind gusts up to 50 mph and penny size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor hail damage to vegetation is
         possible.

Locations impacted include...
Guernsey, Fort Laramie, Hartville, Pine Ridge Estates, Oregon Trail
Ruts State Historic Site, Fort Laramie National Historic Site,
Grayrocks Reservoir, Register Cliff State Historic Site, Sandy Cove
Campground, and Guernsey State Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 4217 10491 4234 10487 4232 10435 4205 10441
TIME...MOT...LOC 2234Z 280DEG 25KT 4225 10479

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...50 MPH

Trudel