Hail Reports in Mankato, Minnesota — Last 90 Days

Mankato is not hail alley, but it is not exempt either — the area averages about 5 hail-producing storms a year. When a cell does track over the county, the reports below tell you the date, the stone size, and how close it came.

Mankato's Storm-Climate Context

Mankato in south-central Minnesota endures one of the most punishing roofing climates in the US. The record low of -35 F in February and January mean of 14.7 F guarantee severe freeze-thaw stress on every roof penetration, flashing joint, and shingle edge across months of winter. Average annual snowfall of 38.7 inches translates to repeated snow load cycles and ice dam formation as attic heat escapes through under-insulated decks. An August 17, 1946 tornado struck southwestern Mankato, killing 11 people, and an F3 tornado hit nearby St. Peter on March 29, 1998, demonstrating the region's tornado exposure alongside its blizzard risk. The record high of 107 F in August adds UV and thermal-expansion stress that compounds granule loss already accelerated by freeze cycling.

Mankato had a 2020 census population of 44,488, estimated at 45,742 by 2023, anchoring a metro area of 104,248. The employment base centers on public institutions: Mankato Area Public Schools (2,123 employees), Mayo Clinic Health System (1,300), and Minnesota State University (1,300). This stable, education-and-healthcare-driven economy sustains steady homeownership rates and drives demand for both storm-damage replacement roofing and planned re-roofing of the aging housing stock common in Minnesota college towns.

Hail Events Near Mankato by Date

September 1, 2026 — 1 report, hail up to 1.00″ (quarter size) Largest in 90 days

August 7, 2026 — 1 report, hail up to 1.00″ (quarter size) Largest in 90 days

Preliminary Local Storm Reports from the NOAA Storm Prediction Center. Sizes are reported hailstone diameters; times are UTC. Reports can be added or corrected for about a day after each event. A quiet page section ≠ no hail — smaller or unreported events happen. The closest report in this window landed 19.4 miles from Mankato's center.

Circle positions are the NOAA SPC report coordinates; tap a circle for the date and hail size.

Hail size: < 1″ 1–1.75″ ≥ 2″ not recorded

How Severe Was It? The NWS Yardstick, Applied to Mankato's Reports

The National Weather Service calls hail severe at 1″ (quarter size) and significant at 2″ (hen-egg size). Scoring the 2 Mankato-area reports (filed in Brown, Waseca Counties) against that scale: 2 of them met the severe 1″+ criterion — the size at which asphalt shingles start taking granule loss and bruising that shows up as leaks a season later. Damage at these sizes is rarely visible from the ground but is typically covered by homeowners insurance when documented promptly.

What to Do If Your Roof Was in the Hail Path

1. Do a ground-level walk-around. Hail is rare enough around Mankato that most homeowners never think to check — look for granules collecting at downspouts, dented gutters or screens, and battered plants after the September 1, 2026 reports above. Stay off the roof itself.
2. Photograph anything suspicious with dates. Even minor-looking marks matter later: this NOAA log plus dated photos connect the damage to a covered storm event instead of "gradual wear", which insurers exclude.
3. Book a free inspection rather than guessing. Bruised shingles and granule loss are invisible from the ground; a written scope from a local roofer settles whether there is a claim at all.
4. Only involve the insurer once you know the scope. If the inspection finds nothing, you have lost nothing; if it finds damage, file within your policy's window while the event date is easy to prove.
5. Bring the written scope to the adjuster. Full walkthrough in the roof insurance claim guide.

Hail History in Mankato — the 10-Year Picture

NOAA's 10-year archive shows 38 hail events in Mankato's county — roughly 4 per year — with hail up to 2.50″. For comparison, the last 90 days alone brought 2 hail days within 25 miles of Mankato (this page's window). Mankato averages roughly 5 hail-producing storms per year. In a market with repeat hail, impact-resistant Class 4 shingles often pay for themselves through insurer premium discounts — worth discussing with a Mankato roofer if a recent event tips you into a replacement. Check your own address on the hail risk lookup.

Mankato's county logged fewer hail events than the Minnesota median (76 per county over 10 years), placing it on the lower end of the state's hail exposure spectrum — though individual storm cells can still produce damaging hail regardless of the long-term average.

Mankato's County, Year by Year (NOAA Archive)

NOAA Storm Events archive, Mankato's county. Years with no row logged no hail events.

The county's busiest hail year in the archive was 2022 (13 recorded events), while the largest stone on record — 2.50″ — fell in 2020. If your roof predates 2020 and has never had a documented inspection, assume it has taken at least one unexamined hit.

Hail in Mankato — Questions Homeowners Ask

Check Your Own ZIP in Mankato

The county-level history above averages over the whole area. For a score tied to your address, run your ZIP through the hail risk lookup — Mankato ZIP codes include 56001, 56003, 56004, 56005, 56007.

Mankato Neighborhoods — Hail Exposure Varies by Area

Hail paths track with storm cell movement, not city limits. If you're in Northridge, Lakeside, Roseville, Central Park or West Side, check your specific street against the report locations above — distance from Mankato's center is listed for each report.

More Resources

Roofing contractors in Mankato · Storm damage repair in Mankato · Insurance claim guide · Roof replacement costs in Mankato · Emergency roof repair