Thunderstorms produced large hail across Goshen and Laramie counties.
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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.
Thunderstorms produced large hail across Goshen and Laramie counties.
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 24, 10:51 AM MST, 1 hour 42 minutes earlier.
Area Forecast Discussion...Corrected Aviation National Weather Service Cheyenne WY 1151 AM MDT SUN JUL 24 2016 .SHORT TERM...(Today through Tuesday) Issued at 240 AM MDT Sun Jul 24 2016 Weak upper level shortwave moving overhead through sunrise will interact with midlvl subtropical moisture and result in isolated showers, mainly across the plains. Models continue to show southeasterly winds developing to the east of the Laramie Range by midday with some llvl moisture advection. The 00z model runs show higher dewpoints, better instability, and better convective chances from the southern Laramie Range eastward in areas near Interstate 80. This is also supported by latest runs of the HRRR. Bumped up pops to around 30 percent across Laramie county. The combination of good instability (CAPE around 1500 J/kg) and bulk shear (45-50 kts) could result in stronger storms so added the mention of small hail/gusty winds. SPC has a marginal risk from the southern Laramie Range eastward into Laramie county. Temps today will be the coolest through the short term. Heights will rise some by Monday and Tuesday with the upper ridge centered just south of the CWA (across SW Colorado). Lee trough/dryline will be located just east of the Laramie Range during the aftn. Instability is high to the east of this feature. However, it is rather capped with CIN values of 50-100 J/kg. Kept slight chance pops confined to the Nebraska Panhandle but it remains to be seen how much convective initiation can occur. Another marginal risk is depicted from SPC. Sfc trough will be right along the eastern edge of the CWA by Tuesday with limited instability/tstms. Temps will rise to slightly above normal by Tuesday. .LONG TERM...(Tuesday night through Saturday) Issued at 220 AM MDT Sun Jul 24 2016 Medium to long range models continue to show the center of the upper level high pressure retrograding westward into the Great Basin region for next week. Northwest flow aloft will develop across Wyoming and Nebraska by Wednesday and Thursday with temperatures lowering closer to normal for this time of the year. Although the high will block subtropical moisture from advecting northward into the forecast area...upslope easterly flow will be common by the middle of next week with model sounding showing a good supply of low to midlevel moisture behind a surface cold front. In addition...several shortwave disturbances embedded in the northwest flow will move southeast out of Canada and will likely result in some cooler air aloft and added instability and jet dynamics. Will need to monitor the potential for strong to severe thunderstorms on Wednesday and even more-so on Thursday due to increased instability and 0-6 bulk shear. There are some differences in timing of this cold front...with the ECMWF and GEM a full 24 hours quicker with the front across southeast Wyoming late on Wednesday. The GFS shows this front stalling across the Dakotas for a while before it progresses southward into the forecast area for Thursday. So not as confident with Wednesday severe potential compared to Thursday...which appears more likely at this time. Temperatures will remain in the 80's to 90's during the day Wednesday...and then likely trend lower by late in the week with highs in the mid 70's to mid 80's expected by Friday behind the cold front. && .AVIATION...(For the 18Z TAFS through 18Z Monday afternoon) Issued at 1143 AM MDT Sun Jul 24 2016 VFR conditions will continue through early afternoon before isolated to scattered thunderstorms mid to late afternoon across portions of southeast Wyoming and far southern Nebraska Panhandle. Prevailing winds will be southeasterly 10-15 kt east of the Laramie Range and westerly 10-20 kt to the west. VCTS forecast at Cheyenne, Laramie, Scottsbluff and Sidney between 20Z and 04Z with MVFR to localized IFR visibilities in heavy rainfall as well as gusty/erratic outflow winds to 40 kt and small hail. Convection will diminish later this evening with clearing skies and light winds. && .FIRE WEATHER... Issued at 220 AM MDT Sun Jul 24 2016 Minimal fire weather concerns through Tuesday. Minimum humidity values will fall to 10-20 percent each afternoon for areas to the west of the Laramie Range. However, wind gusts will stay mostly below 20 mph and thus no fire weather threat is anticipated. Isolated thunderstorms will be possible across areas to the east of the Laramie Range, however the chance of wetting rains will be small. && .CYS Watches/Warnings/Advisories... WY...None. NE...None. && SHORT TERM...ZF LONG TERM...TJT AVIATION...MAJ FIRE WEATHER...ZF
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHEYENNE WY 930 AM MDT SUN JUL 24 2016 NEZ019-020-054-WYZ106>108-110-113>119-251100- SCOTTS BLUFF-BANNER-KIMBALL- CENTRAL LARAMIE RANGE AND SOUTHWEST PLATTE COUNTY- EAST PLATTE COUNTY-GOSHEN COUNTY-NORTH SNOWY RANGE FOOTHILLS- UPPER NORTH PLATTE RIVER BASIN-SNOWY RANGE-LARAMIE VALLEY- SOUTH LARAMIE RANGE-SOUTH LARAMIE RANGE FOOTHILLS- CENTRAL LARAMIE COUNTY-EAST LARAMIE COUNTY- 930 AM MDT SUN JUL 24 2016 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE SOUTHWESTERN NEBRASKA PANHANDLE AND EXTREME SOUTHEAST WYOMING. .DAY ONE...THIS AFTERNOON AND TONIGHT THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND EVENING ACROSS EASTERN ALBANY...PLATTE...GOSHEN...LARAMIE AND KIMBALL COUNTIES. ISOLATED TO SCATTERED THUNDERSTORMS WILL DEVELOP THIS AFTERNOON...PRIMARILY IN THE MARGINAL RISK AREA...WITH THE STRONGEST STORMS PRODUCING SMALL HAIL...GUSTY WINDS...LOCALLY HEAVY RAIN AND FREQUENT LIGHTNING. STORM MOVEMENT WILL BE TO THE EAST AT 15 MPH AND COVERAGE WILL INCREASE THIS EVENING. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY ISOLATED THUNDERSTORMS WILL BE POSSIBLE EARLY THIS WEEK. THUNDERSTORMS ARE EXPECTED TO INCREASE IN COVERAGE BY MID TO LATE WEEK WITH AN INCREASED THREAT FOR SEVERE THUNDERSTORMS WEDNESDAY AND THURSDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE REQUIRED. NEZ002-003-021-055-095-096-WYZ101>105-109-111-112-251100- DAWES-BOX BUTTE-MORRILL-CHEYENNE-NORTH SIOUX-SOUTH SIOUX- CONVERSE COUNTY LOWER ELEVATIONS-NIOBRARA COUNTY- NORTH LARAMIE RANGE-FERRIS/SEMINOE/SHIRLEY MOUNTAINS- SHIRLEY BASIN-CENTRAL CARBON COUNTY-SOUTHWEST CARBON COUNTY- SIERRA MADRE RANGE- 930 AM MDT SUN JUL 24 2016 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF WESTERN NEBRASKA...EAST CENTRAL WYOMING...AND SOUTH CENTRAL WYOMING. .DAY ONE...THIS AFTERNOON AND TONIGHT THE PROBABILITY OF WIDESPREAD HAZARDOUS WEATHER IS LOW. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY ISOLATED THUNDERSTORMS WILL BE POSSIBLE EARLY IN THE WEEK. THUNDERSTORMS ARE EXPECTED TO INCREASE IN COVERAGE BY MID TO LATE WEEK WITH AN INCREASED THREAT FOR SEVERE THUNDERSTORMS WEDNESDAY AND THURSDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE REQUIRED. RUBIN
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
1251 PM MDT SUN JUL 24 2016
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1250 PM HAIL 10 N CHEYENNE 41.29N 104.79W
07/24/2016 M0.25 INCH LARAMIE WY NWS EMPLOYEE
&&
MJAMSKISPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 130 PM MDT SUN JUL 24 2016 WYZ116>118-242015- SOUTH LARAMIE RANGE WY-SOUTH LARAMIE RANGE FOOTHILLS WY- CENTRAL LARAMIE COUNTY WY- 130 PM MDT SUN JUL 24 2016 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN ALBANY AND SOUTHWESTERN LARAMIE COUNTIES UNTIL 215 PM MDT... AT 130 PM MDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM OVER CRYSTAL LAKE CAMPGROUND...OR 20 MILES WEST OF CHEYENNE...MOVING NORTHEAST AT 30 MPH. DIME SIZE HAIL AND WIND GUSTS UP TO 50 MPH WILL BE POSSIBLE WITH THIS STORM. THIS STRONG THUNDERSTORM WILL BE NEAR... FEDERAL AROUND 150 PM MDT. THIS INCLUDES THE FOLLOWING HIGHWAYS... INTERSTATE 25 IN WYOMING BETWEEN MILE MARKERS 13 AND 25. INTERSTATE 80 IN WYOMING BETWEEN MILE MARKERS 339 AND 345. LAT...LON 4107 10523 4115 10528 4147 10498 4119 10472 TIME...MOT...LOC 1930Z 233DEG 24KT 4115 10519 RUBIN
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
133 PM MDT SUN JUL 24 2016
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0133 PM HAIL 10 N CHEYENNE 41.29N 104.79W
07/24/2016 E1.00 INCH LARAMIE WY NWS EMPLOYEE
&&
KCThe Cheyenne radar (KCYS), 16 km away, was scanning. The volume nearest the first event began at 19:31 UTC.
6 hail. Local standard time, as filed.
Quarter size hail was reported about 10 miles north of Cheyenne.
Golf ball size hail was reported about 10 miles north of Cheyenne.
Quarter size hail was reported about 10 miles north of Cheyenne.
Quarter size hail was reported three miles southeast of Hillsdale.
Quarter size hail was reported three miles south of Hawk Springs.
Golf ball size hail was reported four miles west of Lyman.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wyoming in 2016Every state in 2016This day in weather historyWarnings in Wyoming, July 2016
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: 653850, 653852, 653855, 653859, 653861, 653864.