Hail in Jefferson Jun 29, 2026
Hit 35 days agoBoth radar surfaces caught this storm: NEXRAD logged 0 hail signatures up to 1", and the radar-estimated size reached 0.5" aloft.
1"
≈ quarter · the largest NEXRAD radar signature350
0
none filedThe 3rd most severe storm Jefferson 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
- 25 /100
- Homes exposed
- 51 /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 Jefferson saw the hail — from two instruments
Each storm gets two readings: the radar signatures NEXRAD recorded as the cells passed overhead, and a modeled estimate of hail size in the air. They are independent surfaces, so a mismatch between them is expected — and worth reading.
The point detections NEXRAD recorded overhead. Each signature marks where the radar saw hail aloft — it is a detection, not a stone measured on the ground.
Radar-estimated hail size over the swath. The model reports the biggest stone the storm could sustain in the air; what actually fell may have been smaller.
Where Jun 29, 2026 sits in Jefferson's hail record
This was Jefferson's 4th recorded hail day, arriving 29 days after the May 31, 2026 storm. By severity it ranks 3rd of the 5 storms we have logged here. Radar put the day's largest stone over Jefferson at 1" — the largest NEXRAD radar signature.
The Jun 29, 2026 convective day was bigger than Jefferson: the same system put hail over 702 other tracked cities, 51 of them in South Dakota. Nearest: Jackson (7 miles south, up to 1"); Westfield (7 miles north, up to 1"); North Sioux City (9 miles southeast, up to 1.75").
These maps are stills from Jefferson's Jun 29, 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.
For this storm over Jefferson, the NWS report log is empty — a common outcome, since ground reports only happen when someone witnesses the hail and takes the time to call it in. The detection record for the date lives in the radar maps above.
What 1" hail means for Jefferson 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.
$4.2M
Potential roof exposure — 350 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.Track hail over Jefferson on the live map
Radar updates in real time, spotter reports appear on the map as they're filed, and the full Jefferson storm history — this Jun 29, 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
5 recorded storm days in Jefferson, SD
Other storms in Jefferson
Jul 2, 2026
1"
May 31, 2026
1.75"
May 25, 2026
1"
May 17, 2026
0.75"