A line of severe thunderstorms developed over portions of central Campbell County and tracked northeast through much of Crook County. The storms mostly produced wind gusts over 70 mph, but were also accompanied by small 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 UNR wrote it up.
A line of severe thunderstorms developed over portions of central Campbell County and tracked northeast through much of Crook County. The storms mostly produced wind gusts over 70 mph, but were also accompanied by small 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 Rapid City, SD wrote its last area forecast discussion before the first event at May 28, 12:01 PM MST, 2 hours 9 minutes earlier.
Area Forecast Discussion For Western SD and Northeastern WY National Weather Service Rapid City SD 101 PM MDT Sat May 28 2022 .DISCUSSION...(This Evening Through Saturday) Issued at 1257 PM MDT Sat May 28 2022 Water vapor shows evolving upper trof over the western CONUS, with a strong jet streak over the Great Basin and distinct short wave over southeastern ID/northern UT. At the surface, low is deepening across eastern WY along old frontal boundary, with e/se boundary layer flow across our area. Temps are generally in the 70s to lower 80s early this afternoon with rather abundant mid/high clouds. CAMs remain quite consistent developing a line of storms by mid afternoon across northeast WY along the surface low/inverted trof where MLCAPE will be in the 500-1000J/kg range with enhanced shear along the trof. Line of storms will then sweep east/northeast into far western SD by late afternoon and central SD by early evening. While there is some potential for large hail, the greatest threat will be from straight line winds with several bowing segments likely along the line of storms. Storms should quickly exit our far eastern zones by mid evening. Main upper low will take shape over southern ID/northern UT on Sunday. The day will likely start out dry in wake of today's storms, but tail end of front will begin lifting northeast across far eastern WY in the afternoon, with additional convection likely by mid/late afternoon in our southwestern zones. Rather widespread convection will likely lift northeast across our zones Sunday night as robust wave ejects from developing upper low. Best chance for severe storms Sunday afternoon/evening likely east of our forecast area, but there could be some from southwestern into central SD closer to the frontal boundary. Highs should range from the 60s in northeast WY and the Black Hills to the 80s in south central SD. For Monday, models have continued their southeast shift of the main upper which is now expected to lift through central SD. This would spell more widespread precip for our area, along with cooler and windy conditions. Some upslope enhanced precip in the northern Black Hills and northern/eastern foothills also a possibility. At this time, thermal profiles look warm enough for liquid in the Black Hills, although a mix with snow not out of the question at the highest elevations. Main low/trough shifts east for Tuesday although a few residual showers possible given cyclonic flow aloft. Cool and windy conditions likely. Mid week looks mainly dry with a gradual warming trend. There could be another wave that bring precip for late week but model consistently is poor. && .AVIATION...(For the 18Z TAFS Through 18Z Sunday) Issued At 1144 AM MDT Sat May 28 2022 Unsettled conditions will persist through much of the TAF period as a deep trough supports increasing chances for thunderstorms today as well as deteriorating flight conds, to IFR, tonight across northeastern Wyoming. Isolated to scattered MVFR conditions will also be possible in thunderstorms this afternoon and evening as a line of storms moves through the region. && .UNR WATCHES/WARNINGS/ADVISORIES... SD...None. WY...None. && DISCUSSION...Johnson AVIATION...Dye
Hazardous Weather Outlook National Weather Service Rapid City SD 1102 AM MDT Sat May 28 2022 SDZ001-002-012>014-024>026-028-029-072>074-WYZ054>058-071-291300- Harding-Perkins-Butte-Northern Meade Co Plains-Ziebach- Northern Black Hills-Northern Foot Hills-Rapid City- Central Black Hills-Southern Black Hills- Sturgis/Piedmont Foot Hills-Southern Meade Co Plains- Hermosa Foot Hills-Northern Campbell-Southern Campbell- Western Crook-Wyoming Black Hills-Weston-Northeastern Crook- 1102 AM MDT Sat May 28 2022 This Hazardous Weather Outlook is for portions of western South Dakota and northeastern Wyoming. .DAY ONE...This Afternoon and Tonight There is a slight risk (level 2 of 5) of severe thunderstorms today, meaning that scattered severe storms are possible. The primary hazard will be damaging wind gusts up to 70 mph, but hail is also a possibility. .DAYS TWO THROUGH SEVEN...Sunday through Friday An unsettled pattern will continue to bring daily chances for showers and thunderstorms across the area through early next week. However, widespread severe weather is not anticipated. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed today. && Stay tuned to NOAA weather radio for further updates...or check our web site at weather.gov/rapidcity SDZ027-030>032-041>044-046-047-049-291300- Southern Foot Hills-Custer Co Plains-Pennington Co Plains-Haakon- Fall River-Oglala Lakota-Jackson-Bennett-Mellette-Todd-Tripp- 1102 AM MDT Sat May 28 2022 /1202 PM CDT Sat May 28 2022/ This Hazardous Weather Outlook is for portions of south central South Dakota...and southwestern South Dakota. .DAY ONE...This Afternoon and Tonight There is a slight risk (level 2 of 5) of severe thunderstorms today, meaning that scattered severe storms are possible. The primary hazard will be damaging wind gusts up to 70 mph, but hail is also a possibility. .DAYS TWO THROUGH SEVEN...Sunday through Friday On Sunday, there is a risk for strong to severe thunderstorms during the afternoon and evening, with the best chances across southwestern and south central South Dakota. Primary hazards include large hail and strong wind gusts. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed today. && Stay tuned to NOAA weather radio for further updates...or check our web site at weather.gov/rapidcity
Special Weather Statement
National Weather Service Rapid City SD
251 PM MDT Sat May 28 2022
WYZ054-055-282130-
Northern Campbell WY-Southern Campbell WY-
251 PM MDT Sat May 28 2022
...A strong thunderstorm will impact portions of central Campbell
County through 330 PM MDT...
At 251 PM MDT, Doppler radar was tracking a strong thunderstorm 6
miles northeast of Savageton, or 16 miles northwest of Wright, moving
northeast at 40 mph.
HAZARD...Wind gusts up to 50 mph and pea size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
Camplex Event Facility.
This includes Interstate 90 in Wyoming between Mile Markers 111 and
138.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
A Severe Thunderstorm Watch remains in effect until 900 PM MDT for
northeastern Wyoming.
&&
LAT...LON 4451 10562 4419 10508 4417 10508 4375 10570
4385 10595
TIME...MOT...LOC 2051Z 220DEG 40KT 4394 10570
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...50 MPH
DyeThe Rapid City radar (KUDX), 209 km away, was scanning. The volume nearest the first event began at 21:12 UTC.
6 thunderstorm wind, 1 hail. Local standard time, as filed.
Part of a neighbor's tin roof blew into the spotter's yard.
Wind gusts were estimated at 60 mph.
Wind gusts were estimated at 60 mph.
Marble sized hail also fell with the storm.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wyoming in 2022Every state in 2022This day in weather historyWarnings in Wyoming, May 2022
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: 1020208, 1020209, 1020210, 1020212, 1020213, 1020215, 1020216.