Mankato hail storm history
Blue Earth County·NOAA NCEI Storm Events Database·~75-day publication lag
Mankato sits in Blue Earth County, located in central Minnesota where afternoon thunderstorm development is frequent from late spring through mid-summer. The city occupies terrain at the northern edge of the primary North American hail belt, positioned where dry line dynamics and low-level wind patterns create conditions favorable for hail-producing convection.
Check if your roof was damaged by recent hail
Hail activity in Mankato peaks during June and July, when atmospheric instability and wind shear align to produce organized thunderstorms capable of generating large hail. May and August represent secondary risk months when storm frequency declines but individual events can still produce significant hail. The seasonal pattern reflects typical central Minnesota convective behavior, though individual storm timing and intensity vary year to year.
Annual frequency — last 10 years
When hail hits — monthly pattern
Avg events per month · all years · NOAA data
All recorded hail events
Of 130 recorded events, 37 (28%) reached 1.5" or larger — the threshold for likely functional damage on standard asphalt shingles.
Report of hail covering the ground, with the largest stone being quarter-sized. Also tree branches d…
Quarter to golf ball sized hail.
Photo measurement provided via X.
A CoCoRaHS measured golfball size hail.
Nickel size hail just east of Madelia.
There was a social media picture of golf ball size hail in the western portion of Mankato.
Social media had a picture of 2 inch hail in northern Le Sueur County.
A local trained spotter reported dime to occasional quarter size hail in the town of Belle Plaine. R…
There was a large swath of very large hail, up to 2.5 inches in diameter, that fell from Lake Crysta…
There was a swath of large hail, which moved from Le Sueur, northeast to around Heidelberg.
In addition to the large hail stone, there was a power pole blown down in Waseca.
A fire department spotter reported hail as large as two inches fell for around 15 minutes at Lake Ha…
There were several reports of large hail, up to 2 inches in diameter, that fell from southwest of Sh…
Some minor crop damage also occurred with wind driven hail.
NOAA National Centers for Environmental Information Storm Events Database. Publication lag is approximately 75 days — current-year events may be incomplete.
NOAA Storm Events Database ↗