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Lyman County, SD hail & severe wind history
334 storm reports on file for Lyman County between 2010-05-24 and 2026-06-29 — 110 hail and 224 severe thunderstorm wind. That averages 19.6 reports a year, and Jul is the busiest month.
Hail reports
110
6.5 per year
Largest hail
8"
softball+ size · 2010-07-23
Strongest gust
104 mph
90 kt · 2015-06-19
Reported damage
$0
property + crop, as filed
Storm days
135
distinct days with a report
Busiest year
2018
32 reports
Search every Lyman 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).
334 of 334 reports match — the table lists only the 200 most recent; pick a year or month to see older reports. The count and monthly chart cover all 334.
Reports by month for the current filter — the shape of Lyman County’s storm season.
| Date | Type | Size / gust | Nearest location | Report detail |
|---|---|---|---|---|
| 2026-06-29 04:13 | Wind | 61 kt 70 mph | 4.48 mi WSW of Mc Clure | No narrative filed · source: Mesonet |
| 2026-06-29 04:20 | Wind | 51 kt 59 mph | 11.79 mi S of Vivian | No narrative filed · source: Mesonet |
| 2026-06-09 21:05 | Wind | 51 kt 59 mph | 1.99 mi W of Lower Brule | No narrative filed · source: Mesonet |
| 2026-06-04 21:31 | Wind | 59 kt 68 mph | 4.48 mi WSW of Mc Clure | No narrative filed · source: Mesonet |
| 2026-06-04 21:36 | Wind | 56 kt 64 mph | 4.48 mi WSW of Mc Clure | No narrative filed · source: Mesonet |
| 2026-06-04 21:45 | Wind | 51 kt 59 mph | 11.79 mi S of Vivian | No narrative filed · source: Mesonet |
| 2026-06-04 22:05 | Wind | 62 kt 71 mph | 12.44 mi N of Kennebec | No narrative filed · source: Mesonet |
| 2026-06-04 22:24 | Wind | 50 kt 58 mph | .5 mi E of Reliance Arpt | No narrative filed · source: Mesonet |
| 2026-06-03 17:26 | Hail | 1.5" ping pong | 7.69 mi SW of Presho | No narrative filed · source: Trained Spotter |
| 2026-06-03 18:52 | Wind | 52 kt 60 mph | 8.72 mi WNW of Iona | A member of the public estimated winds of 60 mph with the storm. |
| 2026-06-03 19:10 | Hail | 1.75" golf ball | 4.46 mi NW of Iona | No narrative filed · source: Public |
| 2026-06-02 18:33 | Wind | 52 kt 60 mph | 4.48 mi WSW of Mc Clure | The South Dakota Department of Transportation mesonet station nine miles north-northwest of Vivian recorded a peak wind gust of 60 mph (52 knots). |
| 2026-06-02 21:50 | Hail | 1.75" golf ball | 6.93 mi S of Lower Brule | Golf ball-sized hail (1.75 inches) fell five miles southwest of the Counselor Creek Recreation Area. |
| 2025-09-14 17:55 | Wind | 50 kt 58 mph | 1 mi W of Oacoma | No narrative filed · source: Mesonet |
| 2025-08-16 00:55 | Wind | 51 kt 59 mph | .5 mi E of Reliance Arpt | No narrative filed · source: Mesonet |
| 2025-08-16 00:56 | Wind | 57 kt 66 mph | 5.73 mi SSW of Oacoma | No narrative filed · source: Mesonet |
| 2025-08-16 01:00 | Wind | 60 kt 69 mph | 1 mi W of Oacoma | No narrative filed · source: Mesonet |
| 2025-08-13 19:21 | Hail | 1" quarter | 10.41 mi S of Vivian | No narrative filed · source: Public |
| 2025-08-13 19:30 | Wind | 56 kt 64 mph | 11.76 mi S of Vivian | No narrative filed · source: Mesonet |
| 2025-08-13 19:55 | Wind | 63 kt 72 mph | 11.79 mi S of Vivian | A peak wind gust of 73 mph was recorded at a South Dakota State University mesonet station 12 miles south of Vivian. |
| 2025-08-13 20:05 | Wind | 52 kt 60 mph | 14.02 mi SSW of Presho | A caller stated that winds with the storms gusted to between 50 and 60 mph. |
| 2025-08-13 20:30 | Wind | 50 kt 58 mph | 3.71 mi NW of Mc Clure | No narrative filed · source: Mesonet |
| 2025-08-13 20:46 | Wind | 51 kt 59 mph | 12.44 mi N of Kennebec | No narrative filed · source: Mesonet |
| 2025-08-03 18:37 | Hail | 1" quarter | 8.99 mi SW of Oacoma | Hail measuring one inch in diameter was reported nine miles southwest of Oacoma. |
| 2025-08-03 19:15 | Hail | 1.25" half dollar | .5 mi E of Kennebec | Hail measuring 1.25 inches in diameter was reported in the town of Kennebec. |
| 2025-07-29 15:30 | Wind | 57 kt 66 mph | 5.88 mi SSE of Kennebec | No narrative filed · source: Mesonet |
| 2025-07-29 15:36 | Wind | 70 kt 81 mph | 5.06 mi SSW of Reliance Arpt | A member of the public reported that multiple trees were downed in the area and an outbuilding was shifted by the winds. |
| 2025-07-29 15:45 | Wind | 61 kt 70 mph | 5.06 mi SSW of Reliance Arpt | The caller stated that high winds had tipped trees over and blown them onto the house. |
| 2025-07-29 15:51 | Hail | 1" quarter | 5.06 mi SSW of Reliance Arpt | No narrative filed · source: Public |
| 2025-07-29 16:05 | Wind | 61 kt 70 mph | 4.54 mi W of Oacoma | The public observed that wind-driven hail stripped siding from a house. In addition, barn doors were blown off and cattle were forced through a fence and out onto the road. |
| 2025-07-29 16:10 | Wind | 63 kt 72 mph | 1 mi W of Oacoma | A measured wind gust of 72 mph was recorded at the South Dakota State University mesonet weather station near Oacoma. |
| 2025-07-28 17:50 | Hail | 1.75" golf ball | 4.05 mi WSW of Lower Brule | No narrative filed · source: Trained Spotter |
| 2025-07-26 21:00 | Wind | 63 kt 72 mph | 4.48 mi WSW of Mc Clure | A peak gust of 72 mph was measured on the South Dakota Department of Transportation RWIS 9 miles north-northwest of Vivian. |
| 2025-07-23 06:40 | Wind | 54 kt 62 mph | 5.88 mi SSE of Kennebec | No narrative filed · source: Mesonet |
| 2025-07-23 07:00 | Wind | 65 kt 75 mph | 10.45 mi W of Lower Brule | A trained spotter estimated the winds at 75 mph. |
| 2025-07-23 07:00 | Wind | 70 kt 81 mph | 1.99 mi W of Lower Brule | A peak wind gust of 80 mph was observed by the South Dakota State University mesonet station near Lower Brule. West Central Electric Cooperative reported multiple power outages due to broken poles and wires in and around Lower Brule. |
| 2025-07-23 07:05 | Wind | 52 kt 60 mph | 1.99 mi W of Lower Brule | No narrative filed · source: Mesonet |
| 2025-07-14 20:25 | Wind | 55 kt 63 mph | 4.48 mi WSW of Mc Clure | No narrative filed · source: Mesonet |
| 2025-07-09 18:59 | Hail | 2.5" tennis ball | 0 mi N of Lyman | A trained spotter reported hen egg to tennis ball-sized hail near Lyman. The time was estimated based on radar. |
| 2025-07-09 20:00 | Wind | 56 kt 64 mph | 1.99 mi W of Lower Brule | No narrative filed · source: Mesonet |
| 2025-06-27 18:10 | Hail | 1" quarter | 7.34 mi SSW of Kennebec | No narrative filed · source: Trained Spotter |
| 2025-06-27 18:50 | Wind | 52 kt 60 mph | 8.51 mi SW of Presho | The caller stated that they estimated the wind speed at 60 mph. |
| 2025-04-28 01:10 | Wind | 60 kt 69 mph | 1 mi W of Oacoma | No narrative filed · source: Mesonet |
| 2024-07-29 02:11 | Wind | 52 kt 60 mph | 3.99 mi NNE of Iona | The public reported hail to the size of nickels and an estimated 60 mph thunderstorm winds was responsible for damage to the siding on their home. |
| 2024-07-14 00:28 | Wind | 58 kt 67 mph | 4.48 mi WSW of Mc Clure | No narrative filed · source: Mesonet |
| 2024-07-14 00:38 | Wind | 63 kt 72 mph | 4.48 mi WSW of Mc Clure | No narrative filed · source: Mesonet |
| 2024-07-14 00:52 | Wind | 60 kt 69 mph | 12.44 mi N of Kennebec | No narrative filed · source: Mesonet |
| 2024-07-14 00:55 | Wind | 50 kt 58 mph | .85 mi SW of Presho Muni Arpt | No narrative filed · source: Mesonet |
| 2024-07-14 00:59 | Wind | 69 kt 79 mph | 3.71 mi NW of Mc Clure | No narrative filed · source: Mesonet |
| 2024-07-14 01:01 | Wind | 54 kt 62 mph | .5 mi E of Reliance Arpt | No narrative filed · source: Mesonet |
| 2024-07-14 01:15 | Wind | 63 kt 72 mph | 1 mi W of Oacoma | No narrative filed · source: Mesonet |
| 2024-07-14 01:16 | Wind | 66 kt 76 mph | .5 mi E of Reliance Arpt | No narrative filed · source: Mesonet |
| 2024-07-14 01:35 | Wind | 65 kt 75 mph | 1 mi W of Oacoma | No narrative filed · source: Mesonet |
| 2024-04-16 04:26 | Wind | 52 kt 60 mph | .5 mi E of Reliance Arpt | No narrative filed · source: Mesonet |
| 2023-09-04 19:55 | Wind | 51 kt 59 mph | 4.48 mi WSW of Mc Clure | No narrative filed · source: Mesonet |
| 2023-08-04 18:40 | Wind | 52 kt 60 mph | 9.72 mi N of Kennebec | No narrative filed · source: Mesonet |
| 2023-08-04 18:47 | Hail | 1.25" half dollar | 9.93 mi NNE of Presho Muni Arpt | No narrative filed · source: Trained Spotter |
| 2023-08-04 19:05 | Wind | 73 kt 84 mph | 3.72 mi SW of Kennebec | No narrative filed · source: Mesonet |
| 2023-07-26 18:35 | Wind | 56 kt 64 mph | 3.71 mi NW of Mc Clure | No narrative filed · source: Mesonet |
| 2023-07-18 18:29 | Wind | 56 kt 64 mph | 6.3 mi N of Lower Brule | No narrative filed · source: Mesonet |
| 2023-07-18 18:40 | Hail | 1" quarter | 5.25 mi WSW of Lower Brule | No narrative filed · source: Trained Spotter |
| 2023-07-18 18:45 | Wind | 61 kt 70 mph | 3.06 mi WSW of Lower Brule | A trained spotter estimated 70 mph winds, which caused tree damage and downed powerlines. Solar panels were also damaged. |
| 2023-07-18 18:48 | Wind | 56 kt 64 mph | .5 mi W of Lower Brule | No narrative filed · source: Mesonet |
| 2023-07-18 19:05 | Wind | 56 kt 64 mph | .85 mi NW of Oacoma | A semi was tipped over on Instate 90. |
| 2023-07-18 19:05 | Wind | 56 kt 64 mph | 1.47 mi SSW of Reliance | Report of a semi tipped over along Interstate 90. |
| 2023-07-18 19:15 | Wind | 87 kt 100 mph | 1 mi W of Oacoma | No narrative filed · source: Mesonet |
| 2023-07-18 19:16 | Wind | 65 kt 75 mph | 1 mi E of Oacoma | A trained spotter reported tree damage, downed powerlines, tipped over campers, and roof damage in and around Oacoma. |
| 2023-07-18 19:28 | Wind | 62 kt 71 mph | .5 mi E of Reliance Arpt | No narrative filed · source: Mesonet |
| 2023-07-18 19:49 | Hail | 1.5" ping pong | 4.85 mi SW of Kennebec | No narrative filed · source: Trained Spotter |
| 2023-06-24 00:20 | Wind | 71 kt 82 mph | 1.99 mi W of Lower Brule | A South Dakota Mesonet weather station recorded a wind gust of 82 mph. |
| 2023-06-24 00:25 | Wind | 54 kt 62 mph | 1 mi W of Oacoma | A South Dakota Mesonet weather station recorded a wind gust of 62 mph. |
| 2023-06-23 21:00 | Hail | 1.25" half dollar | 6.93 mi S of Kennebec | Estimated quarter to half dollar sized hail damaged crops. The timing of the hail was estimated by radar. |
| 2022-08-24 19:25 | Wind | 52 kt 60 mph | 1 mi W of Oacoma | No narrative filed · source: Mesonet |
| 2022-08-05 17:00 | Wind | 53 kt 61 mph | 6.47 mi SW of Mc Clure | No narrative filed · source: Mesonet |
| 2022-08-05 17:20 | Wind | 61 kt 70 mph | 4.83 mi NNW of Vivian | A semi jackknifed on southbound US 83 due to estimated 70 mph wind gusts. |
| 2022-08-05 17:30 | Wind | 52 kt 60 mph | .5 mi W of Vivian | Many small tree limbs were downed by estimated 60 mph wind gusts. |
| 2022-08-05 17:59 | Wind | 54 kt 62 mph | 3.71 mi NW of Mc Clure | No narrative filed · source: Mesonet |
| 2022-08-05 18:00 | Wind | 65 kt 75 mph | .85 mi NW of Vivian | A trained spotter estimated wind speeds around 75 mph. |
| 2022-08-02 17:32 | Wind | 54 kt 62 mph | .5 mi E of Reliance Arpt | No narrative filed · source: Mesonet |
| 2022-08-02 17:45 | Wind | 54 kt 62 mph | 1 mi W of Oacoma | No narrative filed · source: Mesonet |
| 2022-07-05 10:57 | Wind | 60 kt 69 mph | 4.48 mi WSW of Mc Clure | No narrative filed · source: Mesonet |
| 2022-07-05 11:55 | Wind | 50 kt 58 mph | 1 mi W of Oacoma | No narrative filed · source: Mesonet |
| 2022-07-03 00:13 | Wind | 50 kt 58 mph | .85 mi SW of Presho Muni Arpt | No narrative filed · source: Mesonet |
| 2022-07-03 20:42 | Wind | 50 kt 58 mph | 4.48 mi WSW of Mc Clure | No narrative filed · source: Mesonet |
| 2022-07-03 22:42 | Wind | 59 kt 68 mph | 4.48 mi WSW of Mc Clure | No narrative filed · source: Mesonet |
| 2022-07-03 23:14 | Wind | 61 kt 70 mph | 3.71 mi NW of Mc Clure | No narrative filed · source: Mesonet |
| 2022-07-03 23:46 | Wind | 51 kt 59 mph | 12.44 mi N of Kennebec | No narrative filed · source: Mesonet |
| 2022-06-29 16:50 | Wind | 52 kt 60 mph | 1.65 mi WSW of Vivian | A semi tractor trailer was overturned near Vivian on Interstate 90. The report was relayed via social media, and the time and location is approximate. |
| 2022-06-29 17:03 | Wind | 59 kt 68 mph | 12.44 mi N of Kennebec | No narrative filed · source: Mesonet |
| 2022-06-29 17:56 | Wind | 54 kt 62 mph | .5 mi E of Reliance Arpt | No narrative filed · source: Mesonet |
| 2022-06-20 18:45 | Wind | 50 kt 58 mph | 12.44 mi N of Kennebec | No narrative filed · source: Mesonet |
| 2022-06-12 22:00 | Wind | 52 kt 60 mph | 1.65 mi WNW of Presho | Tree branches were snapped, ranging from small to large in size. |
| 2022-06-12 22:59 | Wind | 60 kt 69 mph | .5 mi E of Reliance Arpt | No narrative filed · source: Mesonet |
| 2022-06-12 23:05 | Wind | 56 kt 64 mph | 1 mi W of Oacoma | No narrative filed · source: Mesonet |
| 2022-06-11 23:59 | Wind | 50 kt 58 mph | 4.48 mi WSW of Mc Clure | No narrative filed · source: Mesonet |
| 2022-05-29 20:32 | Hail | 1" quarter | 3.15 mi NNW of Iona | No narrative filed · source: Public |
| 2022-05-12 00:00 | Hail | 1.75" golf ball | 5.55 mi N of Oacoma | No narrative filed · source: Public |
| 2022-05-12 00:13 | Hail | 0.88" nickel | 7.69 mi NE of Reliance Arpt | No narrative filed · source: Public |
| 2022-05-11 20:45 | Hail | 1" quarter | 11.91 mi S of Reliance Arpt | No narrative filed · source: Public |
| 2022-05-11 22:45 | Hail | 1" quarter | 11.91 mi S of Reliance Arpt | No narrative filed · source: Public |
| 2022-05-11 23:35 | Hail | 0.75" penny | 8.99 mi SW of Oacoma | No narrative filed · source: Public |
| 2021-08-27 02:58 | Wind | 53 kt 61 mph | 4.48 mi WSW of Mc Clure | No narrative filed · source: Mesonet |
| 2021-08-06 21:47 | Wind | 56 kt 64 mph | 3.71 mi NW of Mc Clure | No narrative filed · source: Mesonet |
| 2021-08-06 22:15 | Wind | 62 kt 71 mph | .5 mi E of Reliance Arpt | No narrative filed · source: Mesonet |
| 2021-07-05 13:45 | Wind | 50 kt 58 mph | 12.44 mi N of Kennebec | No narrative filed · source: Mesonet |
| 2021-05-23 20:40 | Wind | 68 kt 78 mph | 3.48 mi W of Presho | Severe thunderstorm winds near 80 mph caused multiple semis to top over on Interstate 90. No injuries reported. |
| 2021-05-23 21:02 | Wind | 72 kt 83 mph | 12.44 mi N of Kennebec | No narrative filed · source: Mesonet |
| 2021-05-23 21:17 | Wind | 74 kt 85 mph | .5 mi E of Reliance Arpt | No narrative filed · source: Mesonet |
| 2020-08-27 22:52 | Wind | 50 kt 58 mph | .5 mi E of Reliance Arpt | No narrative filed · source: Mesonet |
| 2020-08-08 22:48 | Wind | 52 kt 60 mph | 5.55 mi N of Iona | Sixty mph winds were estimated. |
| 2020-07-31 18:24 | Wind | 50 kt 58 mph | 4.48 mi WSW of Mc Clure | No narrative filed · source: Mesonet |
| 2020-07-06 22:34 | Wind | 55 kt 63 mph | 4.48 mi WSW of Mc Clure | No narrative filed · source: Mesonet |
| 2020-07-06 22:51 | Wind | 56 kt 64 mph | .85 mi SW of Presho Muni Arpt | No narrative filed · source: Mesonet |
| 2020-07-06 23:09 | Wind | 61 kt 70 mph | 9.32 mi SSE of Presho | No narrative filed · source: Mesonet |
| 2020-07-06 23:38 | Wind | 72 kt 83 mph | .5 mi E of Reliance Arpt | No narrative filed · source: Mesonet |
| 2020-07-05 17:54 | Wind | 63 kt 72 mph | .5 mi E of Reliance Arpt | No narrative filed · source: Mesonet |
| 2020-07-05 18:04 | Wind | 52 kt 60 mph | .5 mi E of Reliance Arpt | No narrative filed · source: Mesonet |
| 2020-06-20 16:59 | Hail | 1.75" golf ball | 1 mi E of Oacoma | No narrative filed · source: Public |
| 2020-06-17 19:26 | Hail | 1" quarter | .85 mi NW of Vivian | No narrative filed · source: Trained Spotter |
| 2020-06-17 19:30 | Hail | 1.5" ping pong | 5.55 mi N of Vivian | No narrative filed · source: CoCoRaHS |
| 2020-06-17 19:50 | Hail | 1.75" golf ball | 10.41 mi N of Presho Muni Arpt | No narrative filed · source: CoCoRaHS |
| 2020-06-07 17:12 | Wind | 58 kt 67 mph | 3.4 mi NW of Mc Clure | No narrative filed · source: Mesonet |
| 2020-06-07 17:26 | Wind | 65 kt 75 mph | 6.53 mi NNE of Mc Clure | Seventy-five mph winds were estimated. |
| 2020-06-07 18:38 | Wind | 70 kt 81 mph | .85 mi NW of Vivian | Estimated eighty mph winds took the roof off a building. |
| 2020-06-07 18:40 | Hail | 1.5" ping pong | 5.55 mi N of Vivian | No narrative filed · source: Public |
| 2020-06-07 18:50 | Hail | 1" quarter | 2.94 mi SSW of Mc Clure | No narrative filed · source: Public |
| 2020-06-06 21:20 | Wind | 66 kt 76 mph | 3.71 mi NW of Mc Clure | No narrative filed · source: Mesonet |
| 2019-09-10 17:10 | Hail | 1" quarter | 3.73 mi NW of Iona | No narrative filed · source: Public |
| 2019-08-17 16:48 | Wind | 61 kt 70 mph | 11.64 mi SW of Presho | Estimated seventy mph winds flattened crops. |
| 2019-08-17 16:57 | Hail | 1.75" golf ball | .85 mi NW of Presho | No narrative filed · source: Public |
| 2019-08-17 17:55 | Wind | 50 kt 58 mph | .5 mi E of Reliance Arpt | No narrative filed · source: Public |
| 2019-08-17 18:14 | Wind | 61 kt 70 mph | 1 mi E of Oacoma | A vehicle was damaged when an estimated seventy mph wind blew a sign into it. |
| 2019-08-17 18:15 | Wind | 52 kt 60 mph | .5 mi E of Reliance Arpt | No narrative filed · source: Mesonet |
| 2019-08-15 14:52 | Wind | 52 kt 60 mph | 3.71 mi NW of Mc Clure | No narrative filed · source: Mesonet |
| 2019-08-15 15:20 | Hail | 1.5" ping pong | 5.55 mi N of Kennebec | No narrative filed · source: Public |
| 2019-08-09 16:40 | Wind | 61 kt 70 mph | 4.45 mi NW of Oacoma | Estimated seventy mph winds knocked over a camper on Interstate-90. |
| 2019-08-06 19:05 | Hail | 2.75" baseball | 8.47 mi W of Lower Brule | No narrative filed · source: Trained Spotter |
| 2019-08-06 19:45 | Wind | 56 kt 64 mph | .5 mi E of Reliance Arpt | No narrative filed · source: Mesonet |
| 2019-08-06 20:15 | Wind | 52 kt 60 mph | .85 mi SW of Lower Brule | Sixty mph winds were estimated. |
| 2019-08-06 20:15 | Hail | 2.75" baseball | .85 mi SW of Lower Brule | Tennis to baseball size hail damaged homes and vehicle windows. |
| 2019-08-06 20:57 | Wind | 70 kt 81 mph | 2.56 mi NE of Iona | Eighty mph winds downed trees and took shingles off the roof. |
| 2019-08-06 21:04 | Hail | 2" hen egg | 2.13 mi SSW of Iona | Golf ball size hail or larger damaged siding, broke windows, and severely damaged crops. |
| 2019-07-20 04:17 | Wind | 53 kt 61 mph | .85 mi SW of Presho Muni Arpt | No narrative filed · source: Mesonet |
| 2019-07-20 05:09 | Wind | 56 kt 64 mph | .5 mi E of Reliance Arpt | No narrative filed · source: Mesonet |
| 2019-07-05 00:14 | Wind | 52 kt 60 mph | 4.48 mi WSW of Mc Clure | No narrative filed · source: Mesonet |
| 2019-07-03 18:10 | Hail | 1.75" golf ball | 13.82 mi S of Presho | Golf ball size hail dented vehicles and broke windshields. |
| 2019-07-03 18:32 | Hail | 1.75" golf ball | 14.02 mi SSW of Presho | Golf ball size hail and strong winds caused vehicle damage and brought down some small tree branches. |
| 2019-07-03 18:40 | Hail | 1" quarter | .5 mi E of Reliance Arpt | No narrative filed · source: Trained Spotter |
| 2019-07-03 18:55 | Hail | 1" quarter | 10.41 mi S of Vivian | No narrative filed · source: Trained Spotter |
| 2019-06-30 17:46 | Hail | 1" quarter | 1.38 mi S of Iona | No narrative filed · source: Storm Chaser |
| 2018-08-27 18:55 | Hail | 3.5" grapefruit | .85 mi NW of Presho | No narrative filed · source: Public |
| 2018-08-27 18:56 | Hail | 1.75" golf ball | 3.07 mi WSW of Presho | No narrative filed · source: Public |
| 2018-08-25 20:24 | Wind | 57 kt 66 mph | .85 mi NW of Presho | No narrative filed · source: Mesonet |
| 2018-08-23 18:35 | Wind | 54 kt 62 mph | 3.4 mi NW of Mc Clure | No narrative filed · source: Mesonet |
| 2018-08-23 18:43 | Wind | 52 kt 60 mph | 11.29 mi SSW of Presho | Sixty mph winds were estimated. |
| 2018-08-06 17:44 | Wind | 69 kt 79 mph | .85 mi NW of Presho | No narrative filed · source: Mesonet |
| 2018-08-06 17:57 | Hail | 1.75" golf ball | .5 mi E of Kennebec | No narrative filed · source: COOP Observer |
| 2018-08-04 22:30 | Hail | 1" quarter | 5.62 mi S of Lower Brule | No narrative filed · source: Public |
| 2018-07-18 10:30 | Hail | 1" quarter | 1.47 mi SSW of Reliance Arpt | No narrative filed · source: Public |
| 2018-07-18 17:54 | Hail | 1.75" golf ball | 5.42 mi SW of Lyman | No narrative filed · source: Public |
| 2018-07-16 19:00 | Hail | 0.88" nickel | 10.94 mi SSW of Presho | No narrative filed · source: Trained Spotter |
| 2018-07-16 19:00 | Hail | 0.88" nickel | 11.64 mi SW of Presho | No narrative filed · source: Public |
| 2018-06-27 03:40 | Wind | 61 kt 70 mph | 3.49 mi N of Lower Brule | Estimated seventy mph winds overturned several center pivots and flattened corn and beans. |
| 2018-06-27 04:00 | Wind | 52 kt 60 mph | .85 mi NW of Lower Brule | Sixty mph winds were estimated. |
| 2018-06-27 04:05 | Hail | 1" quarter | .85 mi NW of Lower Brule | No narrative filed · source: Public |
| 2018-06-27 05:20 | Hail | 1" quarter | 4.57 mi NE of Kennebec | No narrative filed · source: Public |
| 2018-06-27 05:38 | Hail | 1.25" half dollar | 10.02 mi E of Mc Clure | No narrative filed · source: Public |
| 2018-06-27 05:48 | Hail | 1" quarter | 4.94 mi NNE of Oacoma | No narrative filed · source: Public |
| 2018-06-27 06:10 | Hail | 1.25" half dollar | 7.6 mi N of Presho Muni Arpt | No narrative filed · source: Public |
| 2018-06-27 06:36 | Hail | 1.5" ping pong | 4.57 mi NE of Kennebec | No narrative filed · source: Public |
| 2018-06-27 06:55 | Wind | 56 kt 64 mph | 1.38 mi S of Reliance | Several billboards were blown over by estimated sixty-five mph winds. |
| 2018-06-27 07:23 | Hail | 1.75" golf ball | 1 mi E of Oacoma | No narrative filed · source: Trained Spotter |
| 2018-06-11 02:43 | Wind | 52 kt 60 mph | 9.04 mi S of Kennebec | Estimated sixty mph winds ripped some of the vinyl siding off of a house. |
| 2018-06-08 19:30 | Wind | 50 kt 58 mph | 3.4 mi NW of Mc Clure | No narrative filed · source: Mesonet |
| 2018-06-08 19:44 | Wind | 52 kt 60 mph | 13.59 mi SSW of Presho | No narrative filed · source: Trained Spotter |
| 2018-06-08 19:53 | Wind | 62 kt 71 mph | 11.76 mi S of Presho | No narrative filed · source: Mesonet |
| 2018-06-08 20:30 | Wind | 56 kt 64 mph | 0 mi N of Reliance Arpt | No narrative filed · source: Mesonet |
| 2018-06-08 20:35 | Wind | 61 kt 70 mph | 1.5 mi E of Oacoma | A semi was blown off the road near Oacoma. |
| 2018-06-08 20:35 | Wind | 56 kt 64 mph | 1 mi E of Oacoma | No narrative filed · source: Mesonet |
| 2018-06-08 20:35 | Wind | 61 kt 70 mph | .5 mi E of Reliance Arpt | No narrative filed · source: Mesonet |
| 2018-05-24 17:58 | Hail | 1" quarter | 8.04 mi W of Iona | No narrative filed · source: Public |
| 2018-05-17 21:05 | Wind | 57 kt 66 mph | 4.48 mi WSW of Mc Clure | No narrative filed · source: Mesonet |
| 2017-08-21 08:20 | Hail | 1.5" ping pong | 9.67 mi NE of Mc Clure | No narrative filed · source: Public |
| 2017-08-21 08:41 | Wind | 54 kt 62 mph | .85 mi NW of Vivian | No narrative filed · source: Mesonet |
| 2017-08-21 09:20 | Hail | 1" quarter | 8.35 mi S of Lyman | No narrative filed · source: Public |
| 2017-08-21 09:20 | Wind | 56 kt 64 mph | 8.35 mi S of Lyman | Sixty-five mph winds downed several large tree branches. |
| 2017-08-21 09:45 | Hail | 1" quarter | 8.99 mi SW of Oacoma | No narrative filed · source: Public |
| 2017-08-12 14:21 | Hail | 1.25" half dollar | 2.87 mi NW of Lyman | No narrative filed · source: Public |
| 2017-08-12 14:28 | Hail | 1.25" half dollar | 2.87 mi NW of Lyman | No narrative filed · source: Public |
| 2017-08-12 14:29 | Hail | 1.5" ping pong | 2 mi W of Reliance | A large swath of corn was completely destroyed by ping pong hail from two miles west of Reliance to 8 miles east southeast of Reliance. |
| 2017-07-25 18:50 | Wind | 56 kt 64 mph | .5 mi W of Presho | Sixty-five mph winds were estimated. |
| 2017-07-17 16:38 | Wind | 56 kt 64 mph | 3.4 mi NW of Mc Clure | No narrative filed · source: Mesonet |
| 2017-07-17 17:10 | Wind | 61 kt 70 mph | 13.14 mi N of Kennebec | Seventy mph winds were estimated. |
| 2017-07-17 17:47 | Wind | 63 kt 72 mph | .85 mi NW of Presho | No narrative filed · source: Mesonet |
| 2017-07-17 18:28 | Wind | 56 kt 64 mph | 1 mi E of Oacoma | Sixty-five mph winds were estimated. |
| 2017-07-05 20:20 | Wind | 66 kt 76 mph | 3.71 mi NW of Mc Clure | No narrative filed · source: Mesonet |
| 2017-07-05 20:28 | Wind | 52 kt 60 mph | .85 mi NW of Presho | No narrative filed · source: Mesonet |
| 2017-07-05 20:35 | Wind | 58 kt 67 mph | .85 mi NW of Presho | No narrative filed · source: Mesonet |
| 2017-07-05 20:36 | Wind | 64 kt 74 mph | .85 mi SW of Presho Muni Arpt | No narrative filed · source: Mesonet |
| 2017-07-05 21:12 | Wind | 55 kt 63 mph | .5 mi E of Reliance Arpt | No narrative filed · source: Mesonet |
Worst storm days in Lyman County
| Date | Reports that day | Largest hail | Peak gust |
|---|---|---|---|
| 2018-06-27 | 10 | 1.75" (golf ball) | 70 mph |
| 2023-07-18 | 10 | 1.5" (ping pong ball) | 100 mph |
| 2024-07-14 | 9 | — | 79 mph |
| 2010-07-23 | 7 | 8" (softball+) | 72 mph |
| 2018-06-08 | 7 | — | 71 mph |
| 2019-08-06 | 6 | 2.75" (baseball) | 81 mph |
| 2011-05-08 | 6 | 1.75" (golf ball) | 81 mph |
| 2025-08-13 | 6 | 1" (quarter) | 72 mph |
| 2025-07-29 | 6 | 1" (quarter) | 81 mph |
| 2016-07-06 | 6 | — | 84 mph |
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 |
|---|---|---|---|
| 2025-07-09 | 2.5" tennis ball | 0 mi N of Lyman | A trained spotter reported hen egg to tennis ball-sized hail near Lyman. The time was estimated based on radar. |
| 2019-08-06 | 2.75" baseball | 8.47 mi W of Lower Brule | No narrative filed |
| 2019-08-06 | 2.75" baseball | .85 mi SW of Lower Brule | Tennis to baseball size hail damaged homes and vehicle windows. |
| 2019-08-06 | 2" hen egg | 2.13 mi SSW of Iona | Golf ball size hail or larger damaged siding, broke windows, and severely damaged crops. |
| 2018-08-27 | 3.5" grapefruit | .85 mi NW of Presho | No narrative filed |
| 2017-06-11 | 2.5" tennis ball | 2.94 mi SSW of Mc Clure | No narrative filed |
| 2010-07-23 | 8" softball+ | 0 mi N of Vivian | The eight inch diameter hailstone was a United States record. The hailstone also had a circumference of 18.625 inches and weighed 1.9375 pounds. The hailstone broke the previous United States record for diameter (7.0 inches - 22 June 2003 in Aurora, NE) and weight (1.67 pounds - 3 September 1970 in Coffeyville, KS). T… |
| 2010-07-23 | 4.25" softball | .76 mi NW of Vivian | No narrative filed |
When does hail hit Lyman County?
Across 17 years of records, July produced the most reports (116), 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 | 2 | 0.6% |
| May | 33 | 9.9% |
| June | 97 | 29.0% |
| July | 116 | 34.7% |
| August | 72 | 21.6% |
| September | 14 | 4.2% |
| October | 0 | 0.0% |
| 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 46085). 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.