Brookings, SD Hail Storm – September 2025

What Happened

A severe hail storm moved through Brookings, SD on September 14, 2025, with a maximum confirmed hail size of 1 inch. The event unfolded from mid-afternoon into early evening and included warning-area hail alerts, dual-polarization radar detection, and spotter reports.

The first alert came at 1:34 PM CDT with a 1-inch hail call tied to the NWS warning area. By 3:07 PM CDT, dual-polarization radar again supported 1-inch hail in the storm core. A third alert at 5:01 PM CDT carried a spotter-reported 1-inch hail call.

Field reports showed smaller stones in the broader storm footprint. At 2:56 PM CDT, a spotter reported pea to dime-size hail along with strong wind gusts that lasted about 1 or 2 minutes and broke 3- to 4-inch branches in a yard. A second report at 5:14 PM CDT documented tree damage, with the location narrowed using mapping tools and the time estimated from radar.

The storm remained active across multiple passes through the Brookings area. Radar and observer data lined up across the afternoon, with the most precise hail confirmation arriving from the later radar-supported and spotter-verified reports.

Damage Assessment

The field reports point to localized surface impact rather than a broad swath of severe hail damage. One report tied to 2:56 PM CDT described short-lived but strong wind gusts and small hail, along with broken branches in a yard. The branch breakage was limited to pieces in the 3- to 4-inch range, not large limbs or widespread tree failure.

The later 5:14 PM CDT report added a separate tree damage observation. That report was not a direct on-scene measurement. It was a delayed photo submission with the location narrowed by mapping and the time estimated from radar. The report still supports storm-related tree impact in the Brookings area during the evening phase of the event.

Taken together, the reports show a storm that mixed hail with brief wind stress. The hail itself stayed near the 1-inch threshold in the warning alerts and smaller in the spotter field notes. The damage notes stayed concentrated on branches and trees, with no report here of roof loss, shattered siding, or vehicle damage.

For contractors, that pattern usually means a quick field sweep rather than a countywide survey. The highest-value checks are often on trees, gutter lines, soft metal trim, and exposed roof slopes in the path of the afternoon and evening cores. In Brookings, the strongest lead signals in this event came from reports tied to yard damage and delayed tree imagery, not from a long list of structural complaints.

What Contractors Should Know

Brookings sits in an open terrain corridor where storms can move fast and affect more than one neighborhood in a single cycle. On a day like September 14, the first look should go to the areas that sat under the warning polygon from early afternoon through early evening. That includes residential blocks with mature trees and homes with older asphalt shingles or light-gauge metal accessories.