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Poweshiek County, IA hail & severe wind history
84 storm reports on file for Poweshiek County between 2010-04-05 and 2025-07-29 — 37 hail and 47 severe thunderstorm wind. That averages 5.3 reports a year, and Apr is the busiest month.
Hail reports
37
2.3 per year
Largest hail
2.75"
baseball size · 2023-05-07
Strongest gust
105 mph
91 kt · 2010-04-06
Reported damage
$4.6M
property + crop, as filed
Storm days
43
distinct days with a report
Busiest year
2011
13 reports
Search every Poweshiek 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).
84 of 84 reports match.
Reports by month for the current filter — the shape of Poweshiek County’s storm season.
| Date | Type | Size / gust | Nearest location | Report detail |
|---|---|---|---|---|
| 2025-07-29 01:13 | Wind | 55 kt 63 mph | 2.18 mi ENE of Searsboro | Personal weather station gust to 63 mph. |
| 2025-06-20 05:25 | Wind | 52 kt 60 mph | 1.24 mi NE of Grinnell | Delayed report of tree damage, solar farm damage, and large branches downed mainly on the north side of Grinnell. |
| 2025-03-14 17:45 | Wind | 56 kt 64 mph | 3.1 mi W of Malcolm | Two semis blown over. |
| 2024-10-24 14:30 | Hail | 0.88" nickel | .86 mi SE of Grinnell | No narrative filed · source: Trained Spotter |
| 2024-08-15 17:00 | Hail | 0.75" penny | 1.55 mi E of Grinnell Arpt | Hail estimated to be the size of a grape, or 0.75 inches. |
| 2024-07-15 17:19 | Wind | 68 kt 78 mph | .86 mi NE of Searsboro | Mesonet personal weather station report of a 78 mph thunderstorm wind gust. |
| 2024-07-15 17:20 | Wind | 70 kt 81 mph | .52 mi E of Montezuma | Tree on house, with time of occurrence estimated from radar. |
| 2023-05-07 15:40 | Hail | 2.75" baseball | 2.07 mi SW of Grinnell Arpt | Baseball sized hail with strong winds. Report via social media. |
| 2023-05-07 15:42 | Hail | 1.75" golf ball | 0 mi N of Grinnell | Report via social media. |
| 2023-05-07 15:42 | Wind | 55 kt 63 mph | 2.59 mi SW of Grinnell Arpt | Trailers blown over at a dealership south of Grinnell. Report via social media. |
| 2023-05-07 15:45 | Hail | 1.5" ping pong | .69 mi N of Grinnell | No narrative filed · source: CoCoRaHS |
| 2023-05-07 15:50 | Hail | 2.75" baseball | 4.88 mi SSE of Grinnell Arpt | Spotter reported strong winds with potential damage and large hail with wide range of sizes. |
| 2023-05-07 15:53 | Wind | 55 kt 63 mph | 1.72 mi SE of Grinnell Arpt | Semi trailer blown over at mile marker 185 on interstate 80 between Grinnell and Malcom exits. Seen via Iowa DOT cameras. |
| 2023-05-07 15:57 | Hail | 1.75" golf ball | 2.32 mi NNW of Montezuma | Report via social media. |
| 2023-05-07 16:00 | Hail | 1" quarter | 1.73 mi NW of Montezuma | Reported 56mph winds with nickel to quarter sized hail. |
| 2023-05-07 16:00 | Hail | 2" hen egg | 2.58 mi W of Montezuma | Delayed report, time estimated by radar. |
| 2023-04-04 19:06 | Hail | 1" quarter | 3.72 mi SE of Sheridan | No narrative filed · source: Trained Spotter |
| 2023-03-31 14:54 | Hail | 1" quarter | 3.72 mi SE of Sheridan | No narrative filed · source: Public |
| 2022-08-27 15:32 | Hail | 1" quarter | 1.55 mi W of Grinnell Arpt | Report from mping. |
| 2021-12-15 19:25 | Wind | 56 kt 64 mph | 2.93 mi ESE of Grinnell Arpt | Iowa DOT reported 2 semis overturned on Interstate 80 WB near the 185 to 186 mile markers. Just east of Grinnell. |
| 2021-08-26 19:58 | Wind | 55 kt 63 mph | 4.97 mi NE of Searsboro | Gust measured via personal weather station. |
| 2021-08-26 20:00 | Wind | 50 kt 58 mph | 1.73 mi NW of Montezuma | Small tree limbs down. Gust measured by personal weather station. Time estimated via radar. |
| 2021-08-26 20:00 | Wind | 50 kt 58 mph | 0 mi N of Montezuma | Storm chaser reports trees down and damage to outbuildings. Time estimated via radar. |
| 2021-06-20 16:41 | Hail | 1.25" half dollar | 3.73 mi SW of Grinnell Arpt | Public report of half dollar sized hail. |
| 2020-08-10 11:00 | Wind | 70 kt 81 mph | .56 mi NNW of Malcolm | Law enforcement reported a large tree fell on a home. |
| 2020-08-10 11:10 | Wind | 74 kt 85 mph | 2.48 mi SW of Grinnell Arpt | A trained spotter reported a semi blown over on Interstate 80 just west of the Grinnell interchange. |
| 2020-08-10 11:10 | Wind | 70 kt 81 mph | .32 mi ENE of Brooklyn | Law enforcement reported damage to power lines in the area. |
| 2019-09-18 15:43 | Wind | 54 kt 62 mph | 4.69 mi WNW of Montezuma | Poweshiek County Rd. Department reports a power pole blown down. |
| 2019-09-18 15:49 | Hail | 1" quarter | 1.24 mi NW of Montezuma | WHO TV relayed public reports of quarter sized hail near Montezuma. |
| 2019-08-20 05:30 | Wind | 61 kt 70 mph | 1.18 mi S of Grinnell Arpt | Law enforcement reported house, barn and outbuildings heavily damaged by winds. Multiple trees were also reported downed. Time estimated from radar. |
| 2018-09-01 01:33 | Hail | 1" quarter | .69 mi N of Malcolm | NWS Davenport relayed a trained spotter reported of quarter sized hail. |
| 2018-06-06 17:35 | Wind | 61 kt 70 mph | 0 mi N of Grinnell | Emergency manager reported damage to utility poles, power lines down including high voltage lines, and debris throughout the city blocking streets. Time estimated from AWOS gusts. |
| 2018-06-06 17:35 | Wind | 55 kt 63 mph | 0 mi N of Grinnell | Grinnell Airport AWOS recorded a 63 mph wind gust. |
| 2017-08-21 18:05 | Wind | 52 kt 60 mph | 2.37 mi S of Brooklyn | Emergency manager reported estimated 60 to 65 mph winds at Brooklyn exit on I-80. |
| 2017-06-15 23:07 | Wind | 62 kt 71 mph | 1.69 mi WSW of Grinnell Arpt | Grinnell Regional Airport AWOS recorded a 71 mph wind gust. |
| 2017-05-17 16:25 | Wind | 59 kt 68 mph | 2.18 mi WSW of Grinnell Arpt | Marshalltown airport AWOS recorded 68 mph wind gust. |
| 2017-04-15 18:36 | Hail | 1" quarter | 2.92 mi SW of Grinnell Arpt | Trained spotter reported up to quarter sized hail. |
| 2017-04-15 19:00 | Hail | 1" quarter | 2.07 mi N of Malcolm | Trained spotter reported nickel to quarter sized hail. Time estimated from radar. |
| 2016-08-04 18:58 | Wind | 61 kt 70 mph | 0 mi N of Grinnell | Local newspaper reported at least 15 to 20 trees down across the northern side of Grinnell, some 3 to 4 feet in diameter. Multiple trees fell and damaged building and house roofs. At least 12000 people without power in the area. Delayed report, and time estimated from radar. |
| 2015-08-02 19:01 | Hail | 2" hen egg | 4.15 mi NE of Tilton | Twitter report relayed by KWWL of approximately 2 inch hail. Delayed report and time estimated via radar. |
| 2014-07-06 20:10 | Hail | 1" quarter | 1.19 mi SW of Grinnell | No narrative filed · source: Trained Spotter |
| 2014-06-22 13:14 | Wind | 52 kt 60 mph | 2.18 mi WSW of Brooklyn | Winds of 60 MPH blew down small branches. |
| 2014-06-17 01:16 | Wind | 52 kt 60 mph | .49 mi NE of Brooklyn | No narrative filed · source: Mesonet |
| 2014-04-27 14:37 | Wind | 50 kt 58 mph | .86 mi SE of Grinnell | Trees down in the area caused by high thunderstorm winds. |
| 2014-04-27 14:38 | Wind | 50 kt 58 mph | .86 mi SE of Grinnell | Damage to outbuildings and a trailer was caused by high thunderstorm winds. |
| 2014-04-12 22:18 | Hail | 1" quarter | 2.07 mi SW of Grinnell Arpt | No narrative filed · source: Trained Spotter |
| 2013-10-04 07:47 | Hail | 1" quarter | 3.79 mi NNW of Guernsey | Reported at the 200 mile post marker on I-80. |
| 2012-07-25 21:02 | Wind | 57 kt 66 mph | .52 mi E of Brooklyn | No narrative filed · source: Mesonet |
| 2012-06-29 15:30 | Wind | 61 kt 70 mph | 1.24 mi SW of Searsboro | Barn destroyed by high winds. |
| 2012-06-29 15:33 | Wind | 57 kt 66 mph | 2.07 mi SW of Grinnell Arpt | Several large road signs and large tree limbs down near Interstate 80, south of Grinnell. Quarter size hail was also reported. |
| 2012-06-29 15:33 | Hail | 1.25" half dollar | 1 mi SSE of Grinnell Arpt | No narrative filed · source: Trained Spotter |
| 2012-06-29 15:35 | Wind | 63 kt 72 mph | 2.07 mi SW of Grinnell Arpt | Measured wind by an Iowa DOT RWIS site on Interstate 80. A semi-tractortrailer truck was reportedly jackknifed in the area. |
| 2012-06-29 15:39 | Wind | 52 kt 60 mph | 1.03 mi E of Grinnell | A trained spotter estimated winds of 60 MPH. |
| 2012-06-29 15:40 | Wind | 57 kt 66 mph | 1.03 mi W of Montezuma | Peak wind gust was measured by a weather station at the water treatment plant. |
| 2012-06-29 15:45 | Wind | 61 kt 70 mph | .52 mi E of Brooklyn | Many trees and tree limbs down across the city. Some trees on roofs. |
| 2012-06-29 15:45 | Wind | 50 kt 58 mph | .69 mi N of Brooklyn | Measured at the Brooklyn Schoolnet site. |
| 2012-06-29 15:47 | Wind | 52 kt 60 mph | 1.03 mi E of Grinnell | Three to four tree limbs three to five inches in diameter down. One branch was 20 feet long. |
| 2012-06-29 15:55 | Wind | 61 kt 70 mph | .69 mi N of Brooklyn | Measured at the Brooklyn Schoolnet site. |
| 2012-04-14 19:50 | Wind | 52 kt 60 mph | 1.03 mi W of Searsboro | Estimated 60 MPH winds. |
| 2011-07-22 20:15 | Wind | 50 kt 58 mph | .86 mi SE of Grinnell | No narrative filed · source: AWOS |
| 2011-07-11 03:12 | Wind | 61 kt 70 mph | .86 mi SE of Grinnell | Trees down, transformers down, and power outages. |
| 2011-07-11 03:25 | Wind | 57 kt 66 mph | 0 mi N of Grinnell | Numerous trees uprooted and blown down by high winds. |
| 2011-06-21 00:10 | Wind | 57 kt 66 mph | 1.72 mi NW of Brooklyn | Many branches were downed. A gazebo was blown apart and debris strewn along a southwest to northeast path for about 75 feet. Some debris embedded 4 to 6 inches into the ground. |
| 2011-06-05 05:15 | Hail | 1" quarter | 0 mi N of Hartwick | Relayed by County Dispatch. |
| 2011-06-05 05:15 | Hail | 1" quarter | 2.07 mi SE of Brooklyn Arpt | No narrative filed · source: Trained Spotter |
| 2011-05-29 06:50 | Hail | 1" quarter | 1.73 mi NW of Montezuma | Quarter size hail, hail was in a disk-like shape. |
| 2011-05-22 13:10 | Hail | 1.5" ping pong | .52 mi E of Brooklyn | No narrative filed · source: COOP Observer |
| 2011-05-22 13:10 | Hail | 0.75" penny | .52 mi W of Brooklyn | No narrative filed · source: Trained Spotter |
| 2011-05-22 13:10 | Hail | 1" quarter | 1.69 mi ESE of Malcolm | No narrative filed · source: Trained Spotter |
| 2011-05-22 13:15 | Hail | 1.5" ping pong | .69 mi N of Brooklyn | No narrative filed · source: Trained Spotter |
| 2011-05-22 13:15 | Hail | 1.75" golf ball | 2.06 mi W of Carnforth | No narrative filed · source: Trained Spotter |
| 2011-04-03 17:20 | Hail | 1" quarter | 0 mi N of Montezuma | Hail was reported by a KCCI television viewer. |
| 2010-04-30 10:16 | Hail | 1" quarter | 1.03 mi W of Searsboro | No narrative filed · source: Trained Spotter |
| 2010-04-06 02:30 | Hail | 0.88" nickel | .52 mi E of Brooklyn | No narrative filed · source: Trained Spotter |
| 2010-04-06 16:56 | Wind | 78 kt 90 mph | .6 mi SSE of Grinnell | Damage was caused to several homes in Grinnell. |
| 2010-04-06 16:56 | Wind | 91 kt 105 mph | .86 mi SE of Grinnell | On the north edge of Grinnell, cars were reported off the road and flipped. Power lines were down and roofs were blown off homes. |
| 2010-04-06 16:59 | Hail | 1" quarter | .86 mi SE of Grinnell | No narrative filed · source: Trained Spotter |
| 2010-04-06 17:00 | Wind | 70 kt 81 mph | .86 mi SW of Grinnell | Two barns were blown down just west of Grinnell. |
| 2010-04-06 17:01 | Wind | 78 kt 90 mph | 1.55 mi W of Grinnell | Two power poles were blown down and damage was reported to small buildings. |
| 2010-04-06 17:02 | Wind | 65 kt 75 mph | .86 mi SE of Grinnell | Sheet metal was blown down and there was street sign damage. |
| 2010-04-06 17:02 | Hail | 1.5" ping pong | .86 mi SE of Grinnell | No narrative filed · source: Law Enforcement |
| 2010-04-06 17:05 | Wind | 65 kt 75 mph | 1.72 mi SW of Brooklyn | Tree damage was reported with winds estimated near 75 MPH. |
| 2010-04-05 15:46 | Hail | 1.25" half dollar | 2.58 mi E of Deep River | The hail covered the ground. |
| 2010-04-05 15:48 | Hail | 1" quarter | 3.62 mi E of Deep River | No narrative filed · source: Trained Spotter |
Worst storm days in Poweshiek County
| Date | Reports that day | Largest hail | Peak gust |
|---|---|---|---|
| 2012-06-29 | 10 | 1.25" (half dollar) | 72 mph |
| 2023-05-07 | 9 | 2.75" (baseball) | 63 mph |
| 2010-04-06 | 9 | 1.5" (ping pong ball) | 105 mph |
| 2011-05-22 | 5 | 1.75" (golf ball) | — |
| 2021-08-26 | 3 | — | 63 mph |
| 2020-08-10 | 3 | — | 85 mph |
| 2010-04-05 | 2 | 1.25" (half dollar) | — |
| 2019-09-18 | 2 | 1" (quarter) | 62 mph |
| 2017-04-15 | 2 | 1" (quarter) | — |
| 2011-06-05 | 2 | 1" (quarter) | — |
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 |
|---|---|---|---|
| 2023-05-07 | 2.75" baseball | 2.07 mi SW of Grinnell Arpt | Baseball sized hail with strong winds. Report via social media. |
| 2023-05-07 | 2.75" baseball | 4.88 mi SSE of Grinnell Arpt | Spotter reported strong winds with potential damage and large hail with wide range of sizes. |
| 2023-05-07 | 2" hen egg | 2.58 mi W of Montezuma | Delayed report, time estimated by radar. |
| 2015-08-02 | 2" hen egg | 4.15 mi NE of Tilton | Twitter report relayed by KWWL of approximately 2 inch hail. Delayed report and time estimated via radar. |
When does hail hit Poweshiek County?
Across 16 years of records, April produced the most reports (20), followed by the months either side of it. Monthly totals:
| Month | Reports | Share |
|---|---|---|
| January | 0 | 0.0% |
| February | 0 | 0.0% |
| March | 2 | 2.4% |
| April | 20 | 23.8% |
| May | 16 | 19.0% |
| June | 20 | 23.8% |
| July | 8 | 9.5% |
| August | 12 | 14.3% |
| September | 3 | 3.6% |
| October | 2 | 2.4% |
| November | 0 | 0.0% |
| December | 1 | 1.2% |
Nearby counties in Iowa
Polk County (645)Linn County (550)Scott County (434)Story County (328)Johnson County (295)Woodbury County (290)Dubuque County (272)Dallas County (268)Benton County (265)Warren County (255)Marion County (236)Buchanan County (226)
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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 19157). 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.