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Sully County, SD hail & severe wind history
83 storm reports on file for Sully County between 2010-07-21 and 2026-06-15 — 42 hail and 41 severe thunderstorm wind. That averages 4.9 reports a year, and Jul is the busiest month.
Hail reports
42
2.5 per year
Largest hail
2.75"
baseball size · 2016-07-30
Strongest gust
100 mph
87 kt · 2025-07-14
Reported damage
$0
property + crop, as filed
Storm days
51
distinct days with a report
Busiest year
2018
16 reports
Search every Sully County report
Filter the full record below — pick a year, narrow to a month, or drag the hail-size slider to see only the storms big enough to dent a roof (1" and up is the usual threshold insurers care about).
83 of 83 reports match.
Reports by month for the current filter — the shape of Sully County’s storm season.
| Date | Type | Size / gust | Nearest location | Report detail |
|---|---|---|---|---|
| 2026-06-15 14:05 | Wind | 52 kt 60 mph | 2.95 mi E of Okobojo | No narrative filed · source: Mesonet |
| 2026-04-22 18:35 | Wind | 56 kt 64 mph | 4.96 mi E of Gallagher | No narrative filed · source: Mesonet |
| 2025-07-23 05:09 | Wind | 52 kt 60 mph | 4.04 mi NE of Gallagher | No narrative filed · source: Mesonet |
| 2025-07-23 05:15 | Wind | 65 kt 75 mph | 1.96 mi W of Gallagher | No narrative filed · source: Mesonet |
| 2025-07-14 18:50 | Wind | 56 kt 64 mph | 2.95 mi E of Okobojo | No narrative filed · source: Mesonet |
| 2025-07-14 19:30 | Wind | 87 kt 100 mph | 4.59 mi NNW of Clifton | The Sully County Sheriff reported multiple powerlines were downed by an estimated 100 mph thunderstorm wind gust west of Onida. |
| 2025-07-09 18:45 | Wind | 55 kt 63 mph | 2.95 mi E of Okobojo | No narrative filed · source: Mesonet |
| 2025-06-27 20:45 | Wind | 56 kt 64 mph | 2.95 mi E of Okobojo | No narrative filed · source: Mesonet |
| 2025-06-27 21:03 | Wind | 52 kt 60 mph | .49 mi E of Onida | No narrative filed · source: Mesonet |
| 2024-07-14 00:20 | Wind | 53 kt 61 mph | 2.95 mi E of Okobojo | No narrative filed · source: Mesonet |
| 2024-07-14 00:55 | Wind | 54 kt 62 mph | 2.95 mi E of Okobojo | No narrative filed · source: Mesonet |
| 2024-06-27 21:55 | Wind | 52 kt 60 mph | 2.95 mi E of Okobojo | No narrative filed · source: Mesonet |
| 2024-06-27 22:00 | Wind | 64 kt 74 mph | 2.95 mi E of Okobojo | No narrative filed · source: Mesonet |
| 2024-05-23 18:30 | Hail | 1" quarter | 1.47 mi NNW of Agar | No narrative filed · source: Public |
| 2023-07-30 11:15 | Hail | 1.5" ping pong | 6.42 mi NE of Laurel | No narrative filed · source: Public |
| 2023-07-13 15:35 | Wind | 51 kt 59 mph | 2.95 mi E of Okobojo | No narrative filed · source: Mesonet |
| 2023-06-24 00:20 | Wind | 61 kt 70 mph | .85 mi SE of Onida | A personal weather station recorded a wind gust of 70 mph. |
| 2022-07-05 09:55 | Wind | 57 kt 66 mph | 3.7 mi WNW of Gallagher | No narrative filed · source: Mesonet |
| 2022-07-05 10:35 | Wind | 67 kt 77 mph | 7.41 mi ENE of Onida | No narrative filed · source: Mesonet |
| 2022-06-24 17:57 | Hail | 1.75" golf ball | 9.82 mi E of Agar | No narrative filed · source: Public |
| 2022-06-24 18:30 | Hail | 1" quarter | 0 mi N of Clifton | No narrative filed · source: Public |
| 2020-08-27 22:23 | Wind | 54 kt 62 mph | 4.02 mi ESE of Fielder | No narrative filed · source: Mesonet |
| 2020-07-22 07:55 | Hail | 1" quarter | 2.55 mi WNW of Onida Muni Arpt | No narrative filed · source: Public |
| 2020-06-07 19:32 | Hail | 1" quarter | 3.6 mi NE of Gallagher | No narrative filed · source: Trained Spotter |
| 2019-08-17 14:50 | Wind | 52 kt 60 mph | 6.88 mi SSE of Okobojo | Sixty mph winds were estimated. |
| 2019-08-17 14:50 | Hail | 0.88" nickel | 6.88 mi SSE of Okobojo | No narrative filed · source: Public |
| 2019-08-17 18:25 | Hail | 1" quarter | 2.07 mi N of Onida Muni Arpt | No narrative filed · source: COOP Observer |
| 2019-08-09 13:20 | Wind | 56 kt 64 mph | 2.81 mi S of Onida | Winds were estimated at sixty-five mph by a driver on Highway 83. |
| 2019-08-06 17:39 | Hail | 1.75" golf ball | 5.93 mi NW of Agar | Golf ball hail broke all windows on the north side of the house. |
| 2019-08-06 17:43 | Hail | 1.75" golf ball | 5.38 mi NW of Agar | A destructive hail and wind storm left Potter county and entered northern Sully county continuing to the southeast and destroying crops and grassland until the storm weakened near Onida. |
| 2019-08-06 17:43 | Wind | 61 kt 70 mph | 5.88 mi E of Laurel | Estimated seventy mph winds downed a large tree onto some power lines. |
| 2019-08-06 17:43 | Hail | 1.75" golf ball | 5.88 mi E of Laurel | No narrative filed · source: Trained Spotter |
| 2019-08-06 17:50 | Hail | 1.75" golf ball | .69 mi N of Onida | No narrative filed · source: Public |
| 2019-07-20 02:44 | Wind | 61 kt 70 mph | 3.49 mi N of Agar | No narrative filed · source: Mesonet |
| 2019-07-20 03:09 | Wind | 65 kt 75 mph | 1.48 mi E of Fielder | Estimated seventy-five mph winds tipped over a camper. |
| 2018-09-10 06:28 | Hail | 1.25" half dollar | 4.17 mi N of Agar | No narrative filed · source: Public |
| 2018-09-10 07:25 | Hail | 1.5" ping pong | 11.81 mi E of Onida | No narrative filed · source: Trained Spotter |
| 2018-08-26 19:02 | Hail | 1.5" ping pong | 8.56 mi SSE of Onida | No narrative filed · source: Fire Department/Rescue |
| 2018-07-04 00:55 | Wind | 51 kt 59 mph | 0 mi N of Onida Muni Arpt | No narrative filed · source: Mesonet |
| 2018-06-29 20:00 | Hail | 1.75" golf ball | 3.69 mi SW of Gallagher | A severe thunderstorm moved out of northern Stanley county and across central Sully county bringing golf ball hail and winds up to eighty mph. The hail and winds created a path of crop and pasture destruction as it moved east into northern Hyde county. There was also some property damage along the storms path. |
| 2018-06-29 20:26 | Hail | 1" quarter | 4.59 mi NNW of Onida Muni Arpt | No narrative filed · source: COOP Observer |
| 2018-06-29 20:32 | Wind | 70 kt 81 mph | 1.47 mi W of Onida Muni Arpt | Estimated eighty mph winds downed several miles of power poles with some falling onto and blocking the road. |
| 2018-06-29 20:34 | Wind | 61 kt 70 mph | 0 mi N of Onida Muni Arpt | Severe winds along with large hail broke all windows on one side of the house. |
| 2018-06-29 20:35 | Wind | 56 kt 64 mph | .49 mi W of Onida Muni Arpt | No narrative filed · source: AWOS |
| 2018-06-27 02:15 | Hail | 1" quarter | 2.02 mi SW of Gallagher | No narrative filed · source: Trained Spotter |
| 2018-06-27 02:25 | Hail | 1.75" golf ball | 8.83 mi NW of Gallagher | Large hail and damaging winds destroyed thousands of acres of crops and pastureland as a severe thunderstorm moved out of southeast Dewey county, across Sully county and through Hughes county. Some property damage also resulted from the severe winds and hail. |
| 2018-06-05 22:23 | Wind | 63 kt 72 mph | 3.45 mi N of Agar | No narrative filed · source: Mesonet |
| 2018-05-27 22:42 | Hail | 1" quarter | 13.79 mi SE of Onida | No narrative filed · source: COOP Observer |
| 2018-05-17 20:00 | Wind | 52 kt 60 mph | 5.22 mi SSE of Fielder | Sixty mph winds were estimated. |
| 2018-05-17 20:10 | Wind | 54 kt 62 mph | 1.38 mi N of Agar | No narrative filed · source: Mesonet |
| 2018-05-17 21:12 | Wind | 52 kt 60 mph | 0 mi N of Onida | Estimated sixty mph winds took a large branch off of a tree. |
| 2017-08-21 05:36 | Hail | 1" quarter | 5.71 mi NE of Gallagher | No narrative filed · source: Public |
| 2017-08-21 05:40 | Hail | 1" quarter | 3.99 mi E of Gallagher | No narrative filed · source: Public |
| 2017-06-13 16:12 | Wind | 65 kt 75 mph | 15.22 mi E of Onida | An estimated seventy-five mph wind uprooted two trees. |
| 2016-08-14 20:00 | Wind | 52 kt 60 mph | 1.2 mi SW of Gallagher | Sixty mph winds were estimated. |
| 2016-08-14 20:20 | Wind | 52 kt 60 mph | .69 mi N of Agar | Sixty mph winds were estimated. |
| 2016-07-30 19:27 | Hail | 1.75" golf ball | 4.16 mi ESE of Laurel | Golf ball size hail caused damage to the home. |
| 2016-07-30 19:30 | Hail | 1.25" half dollar | 3.21 mi NW of Onida Muni Arpt | Large hail damaged a vehicle along with breaking several windows out of the home. |
| 2016-07-30 19:35 | Hail | 1.75" golf ball | .49 mi E of Onida Muni Arpt | No narrative filed · source: Law Enforcement |
| 2016-07-30 19:36 | Hail | 1" quarter | 0 mi N of Onida | No narrative filed · source: Law Enforcement |
| 2016-07-30 20:09 | Hail | 2.75" baseball | 6.93 mi S of Clifton | No narrative filed · source: Law Enforcement |
| 2016-07-09 22:26 | Hail | 1" quarter | 0 mi N of Onida | No narrative filed · source: Fire Department/Rescue |
| 2016-07-06 18:18 | Wind | 61 kt 70 mph | 5.43 mi SSE of Fielder | Seventy mph winds moved a mobile home three to four feet off of its foundation. |
| 2015-09-07 18:23 | Hail | 1.75" golf ball | 3.45 mi S of Onida | No narrative filed · source: Trained Spotter |
| 2015-09-07 18:30 | Hail | 2" hen egg | 5.89 mi E of Onida | No narrative filed · source: Public |
| 2015-06-19 12:00 | Hail | 1" quarter | 5.69 mi SSE of Onida | No narrative filed · source: SHAVE Project |
| 2014-09-07 18:40 | Hail | 1.5" ping pong | 5.67 mi SSE of Okobojo | No narrative filed · source: Public |
| 2014-06-19 16:05 | Hail | 1" quarter | 7.17 mi ESE of Agar | No narrative filed · source: Public |
| 2014-06-18 03:10 | Hail | 1.25" half dollar | 1.47 mi W of Gallagher | No narrative filed · source: Public |
| 2014-06-18 03:50 | Hail | 1" quarter | 5.4 mi E of Gallagher | No narrative filed · source: Public |
| 2013-07-20 18:13 | Hail | 0.88" nickel | 3.39 mi NE of Laurel | No narrative filed · source: Public |
| 2013-07-20 18:15 | Hail | 1" quarter | 2.81 mi ENE of Laurel | No narrative filed · source: Public |
| 2013-07-20 18:35 | Hail | 0.75" penny | 2.46 mi W of Onida Muni Arpt | No narrative filed · source: COOP Observer |
| 2012-06-10 00:10 | Wind | 61 kt 70 mph | 1.38 mi N of Agar | Seventy mph winds downed a tree in the yard. |
| 2012-06-09 23:40 | Hail | 1.75" golf ball | 4.4 mi SSE of Fielder | No narrative filed · source: Public |
| 2012-06-07 18:15 | Wind | 52 kt 60 mph | 1.38 mi N of Agar | Sixty mph winds were estimated. |
| 2012-05-02 19:10 | Hail | 1" quarter | 5.09 mi WNW of Agar | No narrative filed · source: Public |
| 2011-10-06 19:35 | Wind | 56 kt 64 mph | 4.54 mi SE of Okobojo | Sixty-five mph winds were estimated. |
| 2011-08-11 15:20 | Hail | 1" quarter | 2.55 mi ENE of Onida | No narrative filed · source: Public |
| 2011-07-26 16:40 | Hail | 1.25" half dollar | 5.39 mi E of Laurel | No narrative filed · source: Trained Spotter |
| 2011-06-02 22:00 | Wind | 52 kt 60 mph | 4.81 mi SE of Fielder | Sixty mph winds were estimated with no damage occurring. |
| 2010-07-31 18:30 | Wind | 52 kt 60 mph | 2.02 mi SW of Gallagher | Sixty mph winds were estimated with no damage reported. |
| 2010-07-21 15:50 | Wind | 52 kt 60 mph | 2.55 mi WNW of Okobojo | Sixty mph winds were estimated. |
Worst storm days in Sully County
| Date | Reports that day | Largest hail | Peak gust |
|---|---|---|---|
| 2016-07-30 | 5 | 2.75" (baseball) | — |
| 2019-08-06 | 5 | 1.75" (golf ball) | 70 mph |
| 2018-06-29 | 5 | 1.75" (golf ball) | 81 mph |
| 2019-08-17 | 3 | 1" (quarter) | 60 mph |
| 2013-07-20 | 3 | 1" (quarter) | — |
| 2018-05-17 | 3 | — | 62 mph |
| 2015-09-07 | 2 | 2" (hen egg) | — |
| 2022-06-24 | 2 | 1.75" (golf ball) | — |
| 2018-06-27 | 2 | 1.75" (golf ball) | — |
| 2018-09-10 | 2 | 1.5" (ping pong ball) | — |
Reports by year
Report counts are driven partly by how many people were around to report a storm, so recent years tend to look busier than the early 2010s. Treat the trend as a reporting trend, not purely a weather trend.
Notable large-hail events (2" and up)
| Date | Size | Near | What was reported |
|---|---|---|---|
| 2016-07-30 | 2.75" baseball | 6.93 mi S of Clifton | No narrative filed |
| 2015-09-07 | 2" hen egg | 5.89 mi E of Onida | No narrative filed |
When does hail hit Sully County?
Across 16 years of records, July produced the most reports (28), followed by the months either side of it. Monthly totals:
| Month | Reports | Share |
|---|---|---|
| January | 0 | 0.0% |
| February | 0 | 0.0% |
| March | 0 | 0.0% |
| April | 1 | 1.2% |
| May | 6 | 7.2% |
| June | 26 | 31.3% |
| July | 28 | 33.7% |
| August | 16 | 19.3% |
| September | 5 | 6.0% |
| October | 1 | 1.2% |
| November | 0 | 0.0% |
| December | 0 | 0.0% |
Nearby counties in South Dakota
Pennington County (1,392)Meade County (831)Custer County (565)Harding County (461)Jackson County (429)Perkins County (405)Brown County (400)Oglala Lakota County (399)Butte County (394)Lawrence County (390)Fall River County (384)Minnehaha County (351)
See all 66 South Dakota counties →
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About these numbers
Every row above is a report filed with the National Weather Service and archived in the NOAA NCEI Storm Events Database (FIPS 46119). Reports are eyewitness, trained-spotter and damage-survey observations, so they cluster near roads and towns and miss storms over empty country. Hail sizes are estimates. Damage figures are preliminary as filed and are never revised in this archive. Use this page for background, not for an insurance claim, a legal filing, or a roof assessment — for those, get the official record from NOAA directly.