Gregory storm history
Storm events recorded in Gregory, South Dakota between 1950 and 2025.
718
Total events
27
Tornadoes
245
Hail
13
Floods
0
Deaths
$18.1M
Property damage
Most significant events
Strongest tornadoes, deadliest events, and biggest damage in this county. Up to 50 shown.
Tornado F3 Tornado
Tornado F3 Tornado
A tornado developed and touched down in the heart of town near Washington and 7th streets, causing damage to several trees at the touchdown point. Shortly after, the tornado severely damaged several structures while tracking south, including leveling several buildings at the lumb…
Flooding resulted in extensive damage to public infrastructure including numerous county and township roads, culverts, and some bridges.
Large hail, up to two inches in diameter, fell in a swath a few miles wide from northwestern to south central Gregory County. The hail broke numerous windows, severely damaged siding and roofs of homes and other buildings, and severely damaged vehicles, while covering the ground …
High Wind High Wind
Sustained northwest winds reached 40 to 46 mph with a peak gust of 66 mph at Fort Randall Dam.
High Wind High Wind
Northwest winds were sustained between 40 and 57 mph at times, with gusts as high as 82 mph at Fort Randall Dam, 72 mph 2 miles east of Dixon and at Dallas, and 66 mph at a South Dakota Mesonet site 16 miles north of Gregory.
Winter Weather Winter Weather
Snowfall totaled 4.0 inches 9 miles north of Gregory and 2.0 inches 9 miles south of Dallas and at Gregory.
High Wind High Wind
Synoptic northwest winds were occasionally sustained from 40 to 43 mph with gusts as high as 70 mph at a South Dakota Road Weather Information System site at Fort Randall Dam, 61 mph 1 mile east-southeast of Dallas, and 58 mph 2 miles east of Dixon.
Winter Weather Winter Weather
A long-duration snowfall totaled 4.9 inches at Gregory, 4.2 inches 11 miles south-southeast of Burke, and 4.0 inches 9 miles south of Dallas and 4 miles south-southwest of Pickstown.
High Wind High Wind
Sustained winds reached 40 to 47 mph, with gusts measured on South Dakota Road Weather Information System sites as high as 75 mph at Fort Randall Dam, 64 mph 2 miles east of Dixon, and 64 mph at Dallas. The South Dakota Mesonet site 16 miles north of Gregory measured a gust to 60…
High Wind High Wind
Winds were sustained from 30 to 39 mph for several hours, with a gust measured as high as 61 mph at 1535CST at the South Dakota Road Weather Information System site at Fort Randall Dam.
Thunderstorm Wind Thunderstorm Wind
Thunderstorm wind gusts were measured by South Dakota Mesonet station GRMS2 Gregory 16N.
Thunderstorm Wind Thunderstorm Wind
Thunderstorm wind gusts were measured by a Road Weather Information System sensor 2 miles east of Dixon.
Thunderstorm Wind Thunderstorm Wind
Thunderstorm wind gusts were measured by South Dakota Mesonet station GRMS2 Gregory 16N.
Excessive Heat Excessive Heat
Dangerous heat index values peaked as high as 107 degrees 2 miles north of Bonesteel on August 15, and 107 degrees at Fairfax and 105 degrees at Fort Randall Dam on August 16.
Thunderstorm Wind Thunderstorm Wind
Thunderstorm winds, which gusted as high as 60 mph, were measured by South Dakota Mesonet station GGMS2 Gregory 7SSW.
Thunderstorm Wind Thunderstorm Wind
Thunderstorm wind gusts as high as 62 mph were measured by a personal weather station.
Heat Heat
Heat index values peaked as high as 104 degrees 2 miles north of Bonesteel and 100 degrees at Fairfax and Forth Randall Dam.
Hail Hail
Tornado EF1 Tornado
A storm chaser documented the initial touchdown of a tornado a little over a mile to the northwest of Dixon, SD just north of 276th Street in an open field. The tornado traveled to the east-southeast for around 2 miles before it impacted the north side of a farmstead where it dam…
Tornado EF0 Tornado
A storm chaser documented the initial touchdown of a tornado less than one mile northwest of Lucas, SD a bit southeast of the intersection of 283rd Street and 347th Avenue. The tornado then tracked southeast for around one mile, narrowly missing the town of Lucas but uprooting th…
Tornado EF2 Tornado
This was the third tornado documented by a storm chaser across Gregory County. This tornado touched down west of Whetstone Bay on the Missouri River, north of Whetstone Township Highway and to the west of County Road 57. After a very short distance, the tornado broke multiple pow…
Hail Hail
Hail occurred for 15 minutes, as size varied from quarters to golf balls. Most hail was quarter to half-dollar size.
Excessive Heat Excessive Heat
Dangerous heat index readings reached an afternoon peak as high as 116 degrees near Bonesteel, 112 degrees at Fort Randall Dam, 111 degrees at Fairfax, and 109 degrees at South Dakota Mesonet site GGMS2 7 miles south-southwest of Gregory.
Heat Heat
Heat index values peaked during the afternoon hours of July 21 as high as 104 degrees near Bonesteel, 103 degrees at South Dakota Mesonet site GRMS2 16 miles north of Gregory, 102 degrees at Fort Randall Dam, and 101 degrees 2 miles east of Dixon and at South Dakota Mesonet site …
Hail Hail
In addition to hail up to half dollar size, heavy rain and 40-50 mph wind gusts stripped some leaves from trees.
Thunderstorm Wind Thunderstorm Wind
Thunderstorm wind gusts were measured by a Road Weather Information System sensor 2 miles east of Dixon.
Thunderstorm Wind Thunderstorm Wind
Thunderstorm wind gusts were measured by a personal weather station.
Thunderstorm Wind Thunderstorm Wind
Several large tree limbs down in town.
Thunderstorm Wind Thunderstorm Wind
Thunderstorm wind gusts were measured by a Road Weather Information System sensor near Pickstown.
Hail Hail
Hail Hail
Hail fell for several minutes, but was only briefly nickel to quarter size.
Thunderstorm Wind Thunderstorm Wind
Winds measured by South Dakota Mesonet station Gregory 16N.
Excessive Heat Excessive Heat
Daily afternoon and evening heat indices ranged from 105 to 112 degrees with a maximum heat index of 112 degrees a personal weather station near Bonesteel on June 20, 109 degrees at a personal weather station in Fairfax on June 21, 108 degrees at the South Dakota Mesonet site 16 …
Hail Hail
Dime to quarter-sized hail fell near Herrick.
Strong Wind Strong Wind
Sustained easterly winds reached 30 to 39 mph with gusts as high as 56 mph near Dixon and 51 mph near Dallas.
High Wind High Wind
While the highest winds were inconsistent over the period, winds did reach sustained levels from 40 to 47 mph at times with gusts up to 64 mph at Fort Randall Dam, 62 mph near Dixon, and 59 mph 7 miles south-southwest of Gregory.
Thunderstorm Wind Thunderstorm Wind
Thunderstorm wind gust was measured by a personal weather station.
High Wind High Wind
Weakening rain showers brought a brief period of gusty winds, which peaked at 58 mph 7 miles south-southwest of Gregory and 57 mph 2 miles east of Dixon.
High Wind High Wind
Aided by rain showers, winds briefly gusted above 58 mph, with a peak gust of 60 mph at the South Dakota Road Weather Information System site near Dixon.
Drought Drought
Severe (D2) drought conditions improved to moderate (D1) late month.
Winter Weather Winter Weather
Snowfall totaled 4.2 inches 8.7 miles north of Gregory, 3.0 inches in Gregory, and 2.5 inches 0.1 miles south of Bonesteel.
High Wind High Wind
Sustained winds reached 40 to 43 mph at times at Dallas, 7 miles south-southwest of Gregory, and 16 miles north of Gregory with a gusts as high as 57 mph, and a gust as high as 61 mph at Fort Randall Dam.
Winter Storm Winter Storm
Snowfall totaled 7.5 inches 4 miles south-southwest of Pickstown, 6.0 inches 8.8 miles south of Dallas, and 5.0 inches 10.5 miles south-southeast of Burke and 8.7 miles north of Gregory.
Winter Weather Winter Weather
Snowfall totaled 4.8 inches near Pickstown, 3.0 inches 9 miles north of Gregory, 2.0 inches 11 miles south-southeast of Burke, and 1.8 inches in Gregory. Northerly winds sustained from 30 to 36 mph, which gusted as high as 55 mph near Dixon and 47 mph at Fairfax, resulted in visi…
Drought Drought
Severe (D2) drought conditions persisted through the month.
Strong Wind Strong Wind
Winds were sustained at 30 to 36 mph with a peak gust of 50 mph near Pickstown, 47 mph near Dixon, and 45 mph at Dallas.
Extreme Cold/Wind Chill Extreme Cold/Wind Chill
The lowest wind chills ranged from 35 to 38 below zero with 38 below zero observed at the South Dakota Road Weather Information System site near Dallas.
Events by year
| Year | Events | Tornadoes |
|---|---|---|
| 2025 | 48 | 3 |
| 2024 | 41 | 0 |
| 2023 | 27 | 0 |
| 2022 | 41 | 0 |
| 2021 | 28 | 0 |
| 2020 | 26 | 0 |
| 2019 | 42 | 2 |
| 2018 | 27 | 0 |
| 2017 | 13 | 0 |
| 2016 | 15 | 0 |
| 2015 | 15 | 0 |
| 2014 | 6 | 0 |
| 2013 | 16 | 0 |
| 2012 | 19 | 0 |
| 2011 | 14 | 0 |
| 2010 | 26 | 2 |
| 2009 | 28 | 0 |
| 2008 | 45 | 0 |
| 2007 | 25 | 2 |
| 2006 | 11 | 0 |
| 2005 | 23 | 0 |
| 2004 | 12 | 0 |
| 2003 | 23 | 2 |
| 2002 | 19 | 1 |
| 2001 | 7 | 0 |
| 2000 | 16 | 0 |
| 1999 | 28 | 1 |
| 1998 | 8 | 0 |
| 1997 | 7 | 0 |
| 1996 | 11 | 0 |
| 1994 | 3 | 0 |
| 1993 | 1 | 0 |
| 1992 | 3 | 0 |
| 1991 | 4 | 0 |
| 1990 | 2 | 0 |
| 1988 | 2 | 0 |
| 1987 | 4 | 0 |
| 1986 | 1 | 0 |
| 1985 | 6 | 3 |
| 1980 | 1 | 0 |
| 1979 | 1 | 0 |
| 1978 | 1 | 0 |
| 1977 | 1 | 0 |
| 1975 | 1 | 0 |
| 1968 | 1 | 1 |
| 1967 | 2 | 2 |
| 1966 | 2 | 1 |
| 1965 | 2 | 1 |
| 1962 | 5 | 3 |
| 1961 | 2 | 0 |
| 1959 | 2 | 1 |
| 1957 | 2 | 0 |
| 1954 | 1 | 1 |
| 1952 | 1 | 1 |