Bay County was hit as recently as 2026-06-25, 36 days ago. Bay County is hit in about half the years on record. The largest stone on record here is 2.5 inches, a tennis ball and 2.5 times the National Weather Service's 1 inch severe criterion, reported on 2014-07-27 near Auburn.
Colored swath = NOAA MRMS radar-estimated hail size; dots = NOAA SPC reports in Michigan. Radar-indicated, not a guarantee of damage.
The last hail here fell on 2026-06-25, around Pinconning. A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls Bay 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 15 separate hail days here since 2010 -- 0.9 a year over 17 years of record. Those days carry 38 separate reports between them, two or three on a typical one. 7 of those 17 years produced none at all. One year dominates the record: 2011 alone produced 3 of the 15 days. The last five years have been quieter than the long run: 3 days since 2022, against 1.0 a year before that.
2 of the 15 days reached 2 inches or more -- 13%, or about one hail day in 8, the last on 2014-07-27. Those big days do not follow the county's usual calendar: most of them fall in March, not May. 5 of the 15 days reached golf-ball size, 1.75 inches or bigger.
Across the whole of Michigan, see the Michigan hail map and history.
Reports cluster nearest Bay City -- 5 of the county's 15 hail days -- then Kawkawlin (3), Pinconning (3), Auburn (2) and Willard (2). Beyond those, NOAA names Linwood and Crump on more than one hail day apiece.
| Place | Hail days since 2010 | Largest stone |
|---|---|---|
| Bay City | 3 | 2.00″ |
| Kawkawlin | 2 | 1.75″ |
| Pinconning | 2 | 1.00″ |
| 1 Ene Kawkawlin | 1 | 2.50″ |
| 5 Nw Auburn | 1 | 2.50″ |
The season runs April through July: 12 of the 15 hail days on record fall in those 4 months (80%). May is the single busiest month, with 4 of them (27%). That peak sits inside the window rather than at either end. Hail has also been reported in March, August and September, outside that window. Reports span 7 of the 12 calendar months; the other 5 have never produced one.
| Month | Hail days |
|---|---|
| March | 1 |
| April | 2 |
| May | 4 |
| June | 3 |
| July | 3 |
| August | 1 |
| September | 1 |
That day put 1 report on the map, the biggest 1 inch near Pinconning. 2 hail days have already been reported this year.
| Date | Max hail | Reports |
|---|---|---|
| 2026-06-25 | 1.00″ | 1 |
| 2026-05-17 | 1.25″ | 2 |
| 2023-07-14 | 1.00″ | 1 |
| 2020-04-07 | 1.75″ | 1 |
| 2017-09-04 | 1.00″ | 1 |
| 2016-07-08 | 1.75″ | 5 |
| 2015-06-08 | 1.00″ | 3 |
| 2014-08-01 | 1.00″ | 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 2.5 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: Genesee County (15 hail days), Montcalm County (13) and Ingham County (16). Bay County sits in between.
Genesee County · Montcalm County · Ingham County
Back to the Michigan hail map or the U.S. hail map.
Data & method: NOAA/NWS Storm Prediction Center reports + NOAA MRMS MESH radar, Bay County, Michigan only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.