Showers and thunderstorms moving across southeast Wyoming and western Nebraska during the afternoon and evening hours produced gusty conditions and hail.
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Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS CYS wrote it up.
Showers and thunderstorms moving across southeast Wyoming and western Nebraska during the afternoon and evening hours produced gusty conditions and hail.
The local office's own words before the first event, 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 the first event at Jul 1, 11:50 AM MST, 2 hours 26 minutes earlier. Its key messages:
Area Forecast Discussion National Weather Service Cheyenne WY 1250 PM MDT Tue Jul 1 2025 .KEY MESSAGES... - There is a Marginal to Slight Risk of strong to severe thunderstorms this afternoon for portions of western Nebraska and far eastern Wyoming. - Warm temperatures and daily chances for PM showers and thunderstorms will continue late this week and into next weekend. && .SHORT TERM /THROUGH THURSDAY/... Issued at 1249 PM MDT Tue Jul 1 2025 A mid to upper level shortwave will kick off thunderstorms this afternoon. Most of the Panhandle is in a Marginal Risk as dewpoints and shear are more favorable in that area. The far eastern portion of the panhandle of our CWA is in a slight as the thunderstorms are likely to intensify the further east the storms travel. Effective shear looks to range between 25 to 35kts with 1000-2000 joules of CAPE. These storms if they do develop are likely to be messy and pulsy as the shear and mid level lapse rates of 7.5C are quite lackluster. However, looking at model soundings severe winds and hail look to be the main threats as the classic inverted v soundings are displayed by the models. Later in the evening, a developing low level jet may enhance this thunderstorm activity, but most of the activity may be moving into central Nebraska by then. For Wednesday and Thursday, a pretty typical summer weather pattern sets up across the region as a slow moving upper level ridge moves east of the area. High temperatures will remain in the 80s west of I-25, and upper 80s to mid 90s east of I-25. Secondary 590 dm ridge axis will push into the area Wednesday. With increasing midlevel subsidence and the lack of any notable forcing, kept mention of precipitation west of the Laramie Range. Showers and thunderstorms will return to most of the region on Thursday as a broad eastern Pacific trough moves into the Great Basin Region and finally into the Intermountain West Thursday afternoon. This feature is expected to bring some subtropical moisture to the area as PWATs increase between 1.00 to 1.50 inches. Continued to increase POP across southeast Wyoming with some heavy rainfall possible. High temperatures will be slightly cooler Thursday afternoon due to cloud cover, but still near or slightly above average for this time of the year. && .LONG TERM /THURSDAY NIGHT THROUGH MONDAY/... Issued at 455 AM MDT Tue Jul 1 2025 Models show the pacific upper level trough continuing to lift northeast across the area Friday with another round of showers and thunderstorms. Thunderstorm coverage is forecast to lower this weekend due to the lack of forcing as weak zonal flow develops across the Intermountain west and across the Rocky Mountain Region. Temperatures remain in the upper 70's to the mid 80's across the forecast area. 700mb temperatures stay around 16 celsius which translate surface temperatures into the low to mid 80's for the lower elevations and upper 70's to low 80's for our more mountainous regions. As we head into next week, models show another slow warming trend as a 595 to 600dm upper level high develops near the four corners region. The position of this high is a bit far south, so any shortwave activity digging south of of Canada will be enough to trigger showers and thunderstorms each afternoon. Kept thunderstorms in the forecast Monday and Tuesday as all models do not show this upper level high drifting northward until the middle of next week. && .AVIATION /18Z TAFS THROUGH 18Z WEDNESDAY/... Issued at 1121 AM MDT Tue Jul 1 2025 A mid-level shortwave will produce scattered thunderstorms this afternoon and evening as they start to develop near KLAR and push east. For KLAR and KCYS development timing looks to be between 19z and 00z. If storms develop then timing for the Panhandle terminals look to be from 00z and 04z. THere is a secondary wave that could produce showers from 02z to 06z but its uncertain if any rain will reach the ground due to the amount of dry air. SKies are expected to clear rather quickly behind these storms and showers. With the exception to the storms VFR conditions are expected today and MVFR to High IFR conditions are expected with some of the stronger storms. && .CYS WATCHES/WARNINGS/ADVISORIES... WY...None. NE...None. && SHORT TERM...MM/TJT LONG TERM...TJT/MM AVIATION...MM
Hazardous Weather Outlook National Weather Service Cheyenne WY 1256 PM MDT Tue Jul 1 2025 WYZ101-103>107-109>119-021900- Converse County Lower Elevations-North Laramie Range- Ferris/Seminoe/Shirley Mountains-Shirley Basin- Central Laramie Range and Southwest Platte County- East Platte 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- 1256 PM MDT Tue Jul 1 2025 This hazardous weather outlook is for portions of east central Wyoming...south central Wyoming and southeast Wyoming. .DAY ONE...THIS AFTERNOON AND TONIGHT Showers and thunderstorms are expected to develop this afternoon. A few strong thunderstorms may contain small hail and brief gusty winds up to 60 MPH. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY Warm temperatures and daily chances for afternoon showers and thunderstorms. .Spotter information statement... Spotter activation will not be needed. NEZ002-003-019>021-054-055-095-096-WYZ102-108-021900- Dawes County-Box Butte County-Scotts Bluff County-Banner County- Morrill County-Kimball County-Cheyenne County- Northern Sioux County-Southern Sioux County-Niobrara County- Goshen County- 1256 PM MDT Tue Jul 1 2025 This hazardous weather outlook is for portions of panhandle Nebraska...east central Wyoming and southeast Wyoming. .DAY ONE...THIS AFTERNOON AND TONIGHT Showers and thunderstorms will develop over southeast Wyoming and move eastward into western Nebraska late this afternoon and this evening. A few of these thunderstorms may become marginally severe with large hail and strong gusty winds. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY Warm temperatures and daily chances for afternoon showers and thunderstorms after Thursday. .Spotter information statement... Spotter activation will not be needed.
Special Weather Statement
National Weather Service Cheyenne WY
219 PM MDT Tue Jul 1 2025
WYZ117-118-012045-
Central Laramie County WY-South Laramie Range Foothills WY-
219 PM MDT Tue Jul 1 2025
...A STRONG THUNDERSTORM WILL IMPACT SOUTHWESTERN LARAMIE COUNTY
THROUGH 245 PM MDT...
At 218 PM MDT, Doppler radar was tracking a strong thunderstorm near
Warren AFB, or 9 miles southwest of Cheyenne, 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...
Cheyenne, Silver Sage Estates, Laramie County Fairgrounds at Archer,
Fox Farm-College, Cheyenne Regional Airport, Winchester Hills, South
Greeley Highway, Warren AFB, Frontier Park, South Cheyenne, Bison
Crossing, North Cheyenne, Ranchettes, Grass Hills, and Cowboy Ranch
South.
This includes the following highways...
Interstate 25 in Wyoming between mile markers 1 and 15.
Interstate 80 in Wyoming between mile markers 351 and 374.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 4101 10504 4121 10501 4119 10457 4100 10459
4100 10498
TIME...MOT...LOC 2018Z 280DEG 20KT 4108 10495
MAX HAIL SIZE...0.75 IN
MAX WIND GUST...50 MPH
RJMThe Cheyenne radar (KCYS), 189 km away, was scanning. The volume nearest the first event began at 21:16 UTC.
2 thunderstorm wind. Local standard time, as filed.
ASOS station KDGW Douglas Airport gusted with a passing thunderstorm.
A shower passing over Interstate 80 resulted in strong, gusty winds. A WYDOT sensor at Walcott Junction on Interstate 80 gusted 64 MPH.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wyoming in 2025Every state in 2025This day in weather historyWarnings in Wyoming, July 2025
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 1260905, 1285368.