Hail in Gann Valley Jul 25, 2026
Hit 9 days agoBoth radar surfaces caught this storm: NEXRAD logged 12 hail signatures up to 1.25", and the radar-estimated size reached 0.75" aloft.
1.25"
≈ half-dollar · the largest NEXRAD radar signature43
0
none filedThe 2nd most severe storm Gann Valley has seen in the last 12 months
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
- Hail size
- 31 /100
- Homes exposed
- 33 /100
- Ground truth
- 0 /100
Largest hailstone — the top predictor of roof damage.
How many homes sit inside the storm's footprint.
Independent storm reports filed with the NWS.
How Gann Valley saw the hail — from two instruments
The maps here read the same storm from two angles — point detections from NEXRAD, and modeled hail size aloft. Where the two disagree is informative: it marks where estimated size outran the signatures, or trailed them.
Where NEXRAD flagged hail as the storm passed — point signatures from the radar, which indicate hail overhead rather than confirm what landed.
The modeled maximum hail size across the swath, derived from radar aloft — the largest stone the storm could have supported, which is not necessarily what reached the ground.
Where Jul 25, 2026 sits in Gann Valley's hail record
This was Gann Valley's 3rd recorded hail day, arriving 23 days after the Jul 2, 2026 storm. By severity it ranks 2nd of the 3 storms we have logged here. Radar put the day's largest stone over Gann Valley at 1.25" — the largest NEXRAD radar signature.
The Jul 25, 2026 convective day was bigger than Gann Valley: the same system put hail over 303 other tracked cities, 102 of them in South Dakota. Nearest: Miller (14 miles north, up to 1.75"); Pukwana (14 miles south, up to 1"); Kimball (15 miles south, up to 1").
These maps are stills from Gann Valley's Jul 25, 2026 storm. In the Overview app the same surfaces are live — radar updating in real time, radar-estimated hail size as it forms, and NWS spotter reports pinned where they're filed — with a radar replay you can scrub back over any past day.
What people on the ground reported
These are storm reports filed with the National Weather Service and released through the NOAA Storm Prediction Center — public-domain observations from spotters, the public, and NWS surveys. We quote each one exactly as filed.
Nobody on the ground filed a report over Gann Valley for this date, which says more about who was watching than about the storm: spotter reports only exist where there is an observer. The radar surfaces above carry the evidence for this one.
What 1.25" hail means for Gann Valley roofs
Quarter-size and larger hail is where asphalt shingle damage starts in earnest: bruised mats and granule loss that homeowners can't see from the ground. Most people inside the footprint won't know their roof was hit until someone inspects it.
$516K
Potential roof exposure — 43 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.Track hail over Gann Valley on the live map
Radar updates in real time, spotter reports appear on the map as they're filed, and the full Gann Valley storm history — this Jul 25, 2026 storm included — sits underneath. When you're ready, draw this storm's footprint and pull highly accurate homeowner contact information for every address inside it.
Highly accurate contact information starting at $0.23 per address — every contact included. Digital leads cost $15–$40. Start with a 7-day free trial — no credit card required. See pricing
3 recorded storm days in Gann Valley, SD
