Odessa, MN Hail Storm – July 2025

What Happened

A severe hail storm crossed the Odessa, MN area on July 27, 2025, with peak verified hail of 2 inches and repeated NWS alert polygons through the afternoon and evening. The strongest reports came in late afternoon and early evening, with radar-derived and spotter-verified alerts showing a storm that held hail production for hours.

The first alert in the sequence came at 11:49 AM CDT with 1.75-inch hail, confirmed by radar and a spotter. Activity increased again around 3:58 PM CDT, when dual-polarization radar detected 1.5-inch hail. By 4:11 PM CDT, radar and spotter reports showed 1-inch hail, then 2-inch hail was verified at 4:25 PM CDT. Additional alerts followed at 5:11 PM CDT, 5:32 PM CDT, 6:12 PM CDT, 6:19 PM CDT, 6:54 PM CDT, 7:06 PM CDT, 7:44 PM CDT, 8:29 PM CDT, 8:40 PM CDT, and 9:28 PM CDT.

Field reports reinforced the intensity of the storm later in the evening. Around 7:40 PM CDT, a spotter report placed 1.75-inch hail in the storm path. At 8:00 PM CDT, three separate spotter-verified reports noted an estimated 2.5 inches of rain with the thunderstorms. The report pattern showed a long-lived hail core and heavy rainfall moving through the same general storm corridor.

Damage Assessment

The field reports point to more than a short burst of hail. Spotter-verified observations came in after multiple hail alerts had already been issued, and the storm also produced 2.5 inches of rain in at least three reports at 8:00 PM CDT. That mix raises the likelihood of water entry, gutter overflow, and localized washout where runoff had nowhere to go.

The hail reports were concentrated across the afternoon and evening storm track. A 1.75-inch spotter report at 7:40 PM CDT and verified 2-inch hail alerts at 4:25 PM CDT, 6:19 PM CDT, and 7:06 PM CDT show a storm capable of repeated roof, siding, and vehicle impacts along the same general path. The dual-polarization radar alerts also confirmed hail growth in multiple rounds, including 1.5-inch signals at 3:58 PM CDT, 5:11 PM CDT, and 9:28 PM CDT.

For property owners, the main concern is not a single isolated cell. This storm produced several hail pulses over a span of hours. Metal surfaces, soft roofs, skylights, gutters, and screens in the Odessa area should be checked for dents, edge damage, and displaced granules. Flat areas and drainage points should also be inspected for standing water and debris left behind by the rain.

What Contractors Should Know

Odessa saw a multi-wave hail event, so field work should start with the later, harder-hit segments of the storm path. Rooftop inspections should prioritize south- and west-facing slopes first, then move to valleys, flashing, vents, and penetrations. On steep-slope roofs, check for impact marks that line up with the afternoon and early evening alerts, not just the last report of the day.