A weak thunderstorm produced severe wind gusts along Interstate 80 during the evening hours of June 26th.
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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.
A weak thunderstorm produced severe wind gusts along Interstate 80 during the evening hours of June 26th.
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 Jun 26, 4:25 PM MST, 2 hours 31 minutes earlier. Its key messages:
Area Forecast Discussion National Weather Service Cheyenne WY 525 PM MDT Fri Jun 26 2026 .KEY MESSAGES... - There is a Slight Risk (2 of 5) of strong to severe thunderstorms Friday afternoon. Isolated large hail and strong gusty winds are possible east of Interstate 25. - Warming temperatures, falling humidity, and increasing winds will increase fire weather concerns this weekend into early next week. && .SHORT TERM /THROUGH SUNDAY NIGHT/... Issued at 121 PM MDT Fri Jun 26 2026 Development is beginning this afternoon generally along the front range and just east where a stationary boundary is located. We should see instability rise once again through the afternoon hours, with some light shear currently present but should be strengthening into the evening hours with bulk shear around 30-50 knots. With this environment, it appears that widely scattered thunderstorms will be possible in the next couple of hours and continue into the evening, with large hail and strong wind gusts the primary hazards. Into Saturday we'll see the dryline move eastwards and bring a much drier environment across the CWA. The one exception to this could be our far eastern Nebraska Panhandle counties, which could see some development during the later afternoon and evening hours, but with how dry low levels will be expectation is that this activity should either be ramping up in this area and will be strongest just east of these counties, or may even be dry in nature as better moisture remains just east. In either case, we should be seeing a break from the stronger storm activity, with daytime relative humidity values back down into the teens and breezy winds accompanying. This should bring an elevated fire weather threat to the area, with the strongest risk for our zones west of the Laramie Range as strong wind gusts are expected with the 700mb jet strengthening to around 45-50 knots. Currently we do not anticipate a Red Flag Warning as last reported fuels remain green, however with how strong these winds may be combined with the dry conditions we are still considering breaking the glass for a warning across this area. Will consult with the evening and nighttime shifts, but a decision may not be made until tomorrow morning. Sunday we'll see a shortwave rounding the base of the larger western US trough moving across the area with the bulk of the best moisture and storm parameters to the north. This will bring a sliver of a marginal risk for stronger storms across our northern zones, but for the most part we'll only have a slight risk of some showers or possible storms in a mostly mediocre environment. Breezy winds expected again from the low-level jet kicking in, but RH values should slightly increase and limit critical fire weather conditions, with an elevated environment expected. Otherwise expect a meager cold front pass across the region through the day, with highs west of the Laramie Range just under or around 80 degrees, with further east highs sit in the 80's to low 90's, but descending as we move into the long term period. && .LONG TERM /MONDAY THROUGH FRIDAY/... Issued at 121 PM MDT Fri Jun 26 2026 The persistent troughing that has been glued to the northwest the better part of the weekend will still be with us to start off the long-term. A strong shortwave on the southern end of this trough will swing by Sunday night into Monday morning with a cold front. We will start off Monday on the backside of the front with winds shifting from the northwest and drier continental air advecting in. High temperatures will be slightly cooler than Sunday's, reaching the upper 70s west and 80s east. Skies should stay mostly clear and winds breezy up to 45-50 mph in some portions of the area. Some high wind conditions may show up along the Laramie Range near the Wheatland area. Most will see gust up to 30 mph. Despite the rainfall we have received the last few days, fuels remain dry in the Nebraska and most eastern Wyoming firezones. The anticipated conditions do incite some concerns in elevated wildland fire possibilities that basically stick around the rest of the long-term period. Tuesday sees much the same as Monday. Winds relax slightly as the shortwave moves off to the northeast and a ridge axis noses in. This will also mark the start of a warming trend through at least Friday, if not longer. Another shortwave associated with the larger troughing will swing by Tuesday. At the surface enough return flow out of the southeast may allow a few storms to develop as the shortwave moves overhead, primarily for the eastern areas. Past Tuesday temperatures continue to increase each day with a slight chance of afternoon thunderstorms. Bulk windshear stays elevated through this period, so I wouldn't discount some risk of severe thunderstorms. Unfortunately after Friday global ensemble models are hinting at a large upper level high pressure system developing and persisting. If this is indeed the reality of the very long term, we could be in for a long period of hot and dry weather. && .AVIATION /00Z TAFS THROUGH 00Z SATURDAY/... Issued at 525 PM MDT Fri Jun 26 2026 Thunderstorms are beginning to take shape across the CWA this afternoon, with a complex heading towards KBFF. Elsewhere, isolated thunderstorms are moving across the region and may impact KCYS, KCDR, KSNY and KAIA in the next hour or so. Therefore, PROB30 groups are in the aforementioned TAFs through about 04Z this evening. Expect gusty and erratic winds in any storm that goes over a terminal or comes in the VC of one. TS activity should begin to wind down after 04Z this evening, but expect winds to remain gusty in the 25 to 35 knot range. Outside of TS activity, VFR conditions will prevail otherwise. && .CYS WATCHES/WARNINGS/ADVISORIES... WY...None. NE...None. && SHORT TERM...CG LONG TERM...RV AVIATION...RZ
Special Weather Statement
National Weather Service Cheyenne WY
711 PM MDT Fri Jun 26 2026
NEZ020-054-270145-
Kimball NE-Banner NE-
711 PM MDT Fri Jun 26 2026
...A STRONG THUNDERSTORM WILL IMPACT CENTRAL KIMBALL AND SOUTH
CENTRAL BANNER COUNTIES THROUGH 745 PM MDT...
At 711 PM MDT, Doppler radar was tracking a strong thunderstorm 9
miles south of Oliver Reservoir, or 14 miles southwest of Kimball,
moving northeast at 35 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...
Kimball, Dix, Kimball Municipal Airport, Oliver Reservoir, Oliver
Reservoir Campground, and Kimball County Fairgrounds.
This includes Interstate 80 in Nebraska between mile markers 10 and
33.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
A Severe Thunderstorm Watch remains in effect until 900 PM MDT for
the Panhandle of Nebraska.
&&
LAT...LON 4100 10400 4145 10372 4122 10342 4100 10379
TIME...MOT...LOC 0111Z 217DEG 31KT 4109 10387
MAX HAIL SIZE...0.50 IN
MAX WIND GUST...50 MPH
ZawislakPreliminary Local Storm Report
National Weather Service Cheyenne WY
718 PM MDT Fri Jun 26 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0718 PM Flash Flood Bridgeport 41.67N 103.10W
06/26/2026 Morrill NE Trained Spotter
Video of street flooding ongoing in downtown
Bridgeport.
&&
RVSpecial Weather Statement
National Weather Service Cheyenne WY
722 PM MDT Fri Jun 26 2026
NEZ020-021-054-055-270145-
Kimball NE-Cheyenne NE-Morrill NE-Banner NE-
722 PM MDT Fri Jun 26 2026
...A STRONG THUNDERSTORM WILL IMPACT NORTHWESTERN CHEYENNE...
NORTHEASTERN KIMBALL...SOUTHWESTERN MORRILL AND SOUTHEASTERN BANNER
COUNTIES THROUGH 745 PM MDT...
At 722 PM MDT, Doppler radar was tracking a strong thunderstorm near
Dix, or 12 miles northeast of Kimball, moving northeast at 5 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...
Redington.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
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.
A Severe Thunderstorm Watch remains in effect until 900 PM MDT for
the Panhandle of Nebraska.
&&
LAT...LON 4125 10347 4135 10357 4162 10329 4148 10303
TIME...MOT...LOC 0122Z 224DEG 5KT 4132 10346
MAX HAIL SIZE...0.50 IN
MAX WIND GUST...50 MPH
ZawislakSpecial Weather Statement
National Weather Service Cheyenne WY
728 PM MDT Fri Jun 26 2026
NEZ019>021-270215-
Scotts Bluff NE-Morrill NE-Banner NE-
728 PM MDT Fri Jun 26 2026
...A STRONG THUNDERSTORM WILL IMPACT SOUTHEASTERN SCOTTS BLUFF...
CENTRAL MORRILL AND NORTHEASTERN BANNER COUNTIES THROUGH 815 PM
MDT...
At 728 PM MDT, Doppler radar was tracking a strong thunderstorm near
Courthouse And Jail Rock, or 29 miles southeast of Scottsbluff,
moving northeast at 20 mph.
HAZARD...Wind gusts of 50 to 55 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...
Bridgeport, Broadwater, Chimney Rock National Historic Site,
Northport, Courthouse And Jail Rock, Bridgeport State Recreation
Area, Morrill County Fairgrounds, The Intersection Of Highway 385 And
92, South Bayard Junction, and The Intersection Of Highway 385 And
L62.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
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.
A Severe Thunderstorm Watch remains in effect until 900 PM MDT for
the Panhandle of Nebraska.
&&
LAT...LON 4148 10318 4172 10339 4198 10273 4182 10267
4176 10267 4174 10265 4170 10263 4160 10263
TIME...MOT...LOC 0128Z 244DEG 16KT 4163 10320
MAX HAIL SIZE...0.75 IN
MAX WIND GUST...55 MPH
ZawislakSpecial Weather Statement
National Weather Service Cheyenne WY
737 PM MDT Fri Jun 26 2026
NEZ019-020-096-WYZ108-270215-
Scotts Bluff NE-South Sioux NE-Banner NE-Goshen County WY-
737 PM MDT Fri Jun 26 2026
...A STRONG THUNDERSTORM WILL IMPACT SCOTTS BLUFF...NORTHWESTERN
BANNER...SOUTH CENTRAL SIOUX AND SOUTHEASTERN GOSHEN COUNTIES THROUGH
815 PM MDT...
At 737 PM MDT, Doppler radar was tracking a strong thunderstorm over
Hawk Springs State Recreation Area, or 22 miles south of Torrington,
moving northeast 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...
Scottsbluff, Gering, Mitchell, Terrytown, Morrill, La Grange, Lyman,
Melbeta, Hawk Springs Reservoir, Stegall, Scotts Bluff County
Fairground, Hawk Springs State Recreation Area, Hawk Springs, Scotts
Bluff National Monument, Hubbard Hill, Scottsbluff Airport, Wycross,
and Hawk Springs Campground.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
A Severe Thunderstorm Watch remains in effect until 900 PM MDT for
the Panhandle of Nebraska...and southeastern Wyoming.
&&
LAT...LON 4178 10431 4209 10381 4179 10349 4165 10406
4163 10418
TIME...MOT...LOC 0137Z 243DEG 26KT 4174 10420
MAX HAIL SIZE...0.50 IN
MAX WIND GUST...50 MPH
ZawislakPreliminary Local Storm Report
National Weather Service Cheyenne WY
755 PM MDT Fri Jun 26 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0745 PM Rain Bridgeport 41.66N 103.10W
06/26/2026 M1.17 Inch Morrill NE Mesonet
Mesonet station CW2360 Bridgeport.
&&
RVThe Cheyenne radar (KCYS), 151 km away, was scanning. The volume nearest the first event began at 01:56 UTC.
1 thunderstorm wind. Local standard time, as filed.
WYDOT site along Interstate 80 near Elk Mountain Wyoming.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wyoming in 2026Every state in 2026This day in weather historyWarnings in Wyoming, June 2026
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: 1339061.