A tornadic thunderstorm tracked eastward into the northern Black Hills from Wyoming. An EF-1 tornado began in Wyoming and moved across west central Lawrence County into Spearfish Canyon before dissipating.
Every event with a place to put it. Tap one for its entry below.
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 tornadic thunderstorm tracked eastward into the northern Black Hills from Wyoming. An EF-1 tornado began in Wyoming and moved across west central Lawrence County into Spearfish Canyon before dissipating. Very large hail to baseball size fell from Lead and Deadwood to Tilford and Piedmont, causing significant damage. The storm continued to be severe as it moved farther east across west central South Dakota, producing wind gusts to 70 mph.
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 Jun 29, 2:17 PM MST, 1 hour 3 minutes earlier.
Area Forecast Discussion For Western SD and Northeastern WY National Weather Service Rapid City SD 317 PM MDT Fri Jun 29 2018 .DISCUSSION...(This Evening Through Friday) Issued at 318 PM MDT Fri Jun 29 2018 Current surface analysis shows low pressure over southeast SD, with cold front now just east of the forecast area. Upper level analysis shows large scale trough centered over the Northern Rockies, with southwest flow over the Northern Plains. Skies are variably cloudy across the area, the most sun to the east of the Black Hills. Temps right now are in the mid 70s to mid 80s. Thunderstorms have developed over northeast WY, with a couple being severe right now. More showers and storms are developing further south across eastern WY. Activity is moving east- northeast. A favorable severe weather threat remains in place through this evening as storms spread east across the rest of the area. A good amount of moisture in the low to mid levels remains across the area, with SBCAPE values ranging from around 1500 j/kg over northeast WY to over 2000 j/kg over parts of southwest and south central SD. Shear is sufficient for supercells, especially across western and southern portions of the forecast area. Cap looks to remain strong to the east of the Black Hills this afternoon, with most of the activity moving into these areas this evening. There is a strong likelihood that the activity will consolidate into a MCS as it moves into/through western SD late this afternoon and this evening. Main threats with severe storms will be large hail and strong wind gusts, but an isolated tornado threat is also expected from northeast WY to southwest SD. Saturday looks to be cool, mainly cloudy. and showery, especially across the Black Hills and southern SD, as the trough moves across the Northern Plains. Some thunderstorms are also expected, especially across southern SD. A strong storm or two is possible toward south central SD, but the severe threat looks minimal at this time. Highs will only be in the upper 60s to upper 70s. Showers will end Saturday evening with a dry and seasonably warm Sunday on tap. Highs on Sunday will be in the mid 70s to mid 80s. Next week looks to be very warm to hot with mainly dry conditions for most areas as a ridge builds over the Plains into the midwest states. Temperatures will be above average for much of the week, highs in the 80s and 90s, with Independence Day possibly being the warmest day of the week. Southwest flow on the back side of the ridge could bring weak energy aloft at times with mainly isolated storms possible, especially mid to late week. && .AVIATION...(For the 18Z TAFS Through 18Z Saturday) Issued At 1055 AM MDT Fri Jun 29 2018 Lingering MVFR CIGS over far southwestern SD and northwestern SD will decrease early this afternoon; otherwise, mostly VFR conditions will continue through the period. The exception will be local IFR/MVFR conditions with scattered thunderstorms that move west-to-east across the forecast area from roughly 19z-07z. Also, after 08z some MVFR CIGS are expected to develop across far southwestern into south-central SD. && .UNR WATCHES/WARNINGS/ADVISORIES... SD...None. WY...None. && DISCUSSION...26 AVIATION...Bunkers
Hazardous Weather Outlook National Weather Service Rapid City SD 238 AM MDT Fri Jun 29 2018 SDZ001-002-012>014-024>032-041>044-046-047-049-072>074-WYZ054>058- 071-301300- Harding-Perkins-Butte-Northern Meade Co Plains-Ziebach- Northern Black Hills-Northern Foot Hills-Rapid City- Southern Foot Hills-Central Black Hills-Southern Black Hills- Custer Co Plains-Pennington Co Plains-Haakon-Fall River- Oglala Lakota-Jackson-Bennett-Mellette-Todd-Tripp- Sturgis/Piedmont Foot Hills-Southern Meade Co Plains- Hermosa Foot Hills-Northern Campbell-Southern Campbell- Western Crook-Wyoming Black Hills-Weston-Northeastern Crook- 238 AM MDT Fri Jun 29 2018 /338 AM CDT Fri Jun 29 2018/ This Hazardous Weather Outlook is for western South Dakota and northeastern Wyoming. .DAY ONE...Today and Tonight Numerous thunderstorms will move across the area this afternoon into tonight. There is a slight risk of severe thunderstorms with large hail and damaging winds. .DAYS TWO THROUGH SEVEN...Saturday through Thursday There is a chance of thunderstorms Saturday, mainly south of Interstate 90. Severe thunderstorms are not expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed today. && Stay tuned to NOAA weather radio for further updates...or check our web site at weather.gov/rapidcity
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RAPID CITY SD
318 PM MDT FRI JUN 29 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0317 PM HAIL 10 NNE ROZET 44.42N 105.12W
06/29/2018 M1.75 INCH CAMPBELL WY PUBLIC
&&
KCLARKPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RAPID CITY SD
339 PM MDT FRI JUN 29 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0327 PM HAIL HULETT 44.68N 104.60W
06/29/2018 M1.50 INCH CROOK WY TRAINED SPOTTER
&&
KCLARKPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RAPID CITY SD
341 PM MDT FRI JUN 29 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0330 PM HAIL HULETT 44.68N 104.60W
06/29/2018 M1.25 INCH CROOK WY PUBLIC
&&
AFOSCATOPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RAPID CITY SD
356 PM MDT FRI JUN 29 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0338 PM TSTM WND GST 1 SSE CARLILE 44.46N 104.79W
06/29/2018 E65 MPH CROOK WY TRAINED SPOTTER
0338 PM HAIL 1 SSE CARLILE 44.46N 104.79W
06/29/2018 E1.50 INCH CROOK WY TRAINED SPOTTER
&&
AFOSCATOPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RAPID CITY SD
402 PM MDT FRI JUN 29 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0352 PM HAIL 4 SE SUNDANCE 44.36N 104.33W
06/29/2018 E1.00 INCH CROOK WY TRAINED SPOTTER
&&
KCLARKPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RAPID CITY SD
419 PM MDT FRI JUN 29 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0403 PM HAIL SUNDANCE 44.40N 104.37W
06/29/2018 E2.50 INCH CROOK WY TRAINED SPOTTER
PEAK WIND 56 MPH. LOTS OF TREE BRANCHES DOWN, SOME
SCREENS TORN OUT OF WINDOWS.
&&
AFOSCATOThe Rapid City radar (KUDX), 101 km away, was scanning. The volume nearest the first event began at 22:22 UTC.
11 hail, 4 thunderstorm wind, 1 tornado. Local standard time, as filed.
The tornado tracked east from Wyoming across the northwestern Black Hills. The tornado snapped trees and caused minor structural damage. The total path length was almost 20 miles.
Hail to the size of baseballs caused significant property damage in Lead.
Large hail caused significant property damage in Deadwood. The estimated damage to just public structures is 1.8 million dollars, with total damage in the city much higher.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in South Dakota in 2018Every state in 2018This day in weather historyThe tornado archive for South Dakota, 2018Warnings in South Dakota, June 2018
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: 765262, 761321, 761322, 761323, 761324, 761325, 761326, 761327, 761328, 761329, 761330, 761331, 761333, 761336, 761338, 761339.