The most recent reported hail day was 2026-04-22, 100 days ago. Seneca County is hit in most years. The largest stone on record here is 3 inches, a teacup and 3 times the National Weather Service's 1 inch severe criterion, reported on 2024-03-14 near Bloomville.
Colored swath = NOAA MRMS radar-estimated hail size; dots = NOAA SPC reports in Ohio. Radar-indicated, not a guarantee of damage.
The last hail here fell on 2026-04-22, around Fostoria. A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls Seneca County addresses inside a hail swath above your size threshold into a door-knock list you can export, scoped to your approved markets.
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See call-center options ->NOAA's Storm Prediction Center has logged 17 separate hail days here since 2010 -- 1.0 a year over 17 years of record. Those days carry 35 separate reports between them, two or three on a typical one. 6 of those 17 years produced none at all. The busiest single year was 2026, with 3 hail days. The last five years have run hotter than the long-run rate: 8 days since 2022, against 0.8 a year before that.
Most hail here stays under 2 inches: only 1 of the 17 days on record passed it, 6%, the last on 2024-03-14. Those big days do not follow the county's usual calendar: most of them fall in March, not June. Golf-ball size is rarer still: 1.75 inches or more on 3 of the 17 days.
Across the whole of Ohio, see the Ohio hail map and history.
Reports cluster nearest Tiffin -- 7 of the county's 17 hail days -- then Bloomville (4), Republic (4), Attica (3) and Fostoria (3). That one town is named on 41% of them.
| Place | Hail days since 2010 | Largest stone |
|---|---|---|
| Tiffin | 4 | 1.25″ |
| Bloomville | 3 | 3.00″ |
| Fostoria | 2 | 1.75″ |
| Attica | 2 | 1.25″ |
| 1 ENE Attica | 1 | 2.00″ |
The season runs April through September: 15 of the 17 hail days on record fall in those 6 months (88%). June is the single busiest month, with 4 of them (24%). That peak sits inside the window rather than at either end. Hail has also been reported in March, outside that window. Reports span 6 of the 12 calendar months; the other 6 have never produced one.
| Month | Hail days |
|---|---|
| March | 2 |
| April | 3 |
| May | 3 |
| June | 4 |
| August | 2 |
| September | 3 |
That day put 2 reports on the map, the biggest 1.5 inches near Fostoria. 3 hail days have already been reported this year.
| Date | Max hail | Reports |
|---|---|---|
| 2026-04-22 | 1.50″ | 2 |
| 2026-04-15 | 1.25″ | 2 |
| 2026-03-26 | 1.00″ | 1 |
| 2024-09-24 | 1.00″ | 1 |
| 2024-03-14 | 3.00″ | 5 |
| 2023-06-15 | 1.75″ | 5 |
| 2022-06-01 | 1.00″ | 1 |
| 2022-05-03 | 1.50″ | 1 |
The colored swath is NOAA's MRMS radar estimate of the largest hail per ~1 km cell; the dots are SPC ground reports. Yellow is about an inch, red 1.5 to 2″, purple 2″ and up (hail size vs roof damage). On this county's worst day the reports reached 3 inches, which is the purple band. Look up a street address with the hail history by address tool.
The nearest counties with a page of their own: Sandusky County (20 hail days), Crawford County (15) and Hancock County (19). Seneca County sits in between.
Sandusky County · Crawford County · Hancock County
Back to the Ohio hail map or the U.S. hail map.
Data & method: NOAA/NWS Storm Prediction Center reports + NOAA MRMS MESH radar, Seneca County, Ohio only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.