Hail in Colby May 17, 2026
NEXRAD caught this storm: 0 hail signatures up to 0". The radar-estimated size surface had no signal to model this day.
0"
≈ pea to penny · radar-estimated size aloft0
0
none filedThe 4th most severe storm Colby 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
- 0 /100
- Homes exposed
- 0 /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 Colby saw the hail — from two instruments
We map this storm two ways: the NEXRAD radar signatures the storm produced overhead, and the radar-estimated size of the hail in the air. The two surfaces don’t have to match — where they diverge is where estimated size aloft ran ahead of, or behind, what the signatures caught.
NEXRAD radar signatures — the point detections the storm produced overhead. A signature is where the radar saw hail, not a confirmed stone on the ground.
Only the NEXRAD radar-signature surface resolved for May 17, 2026 — the estimated-size swath had no hail signal to model for this storm, so there is one map to show, not two.
Where May 17, 2026 sits in Colby's hail record
This was Colby's 1st recorded hail day — the first hail day in our records for the city. By severity it ranks 4th of the 4 storms we have logged here. Radar put the day's largest stone over Colby at 0" — radar-estimated size aloft.
The May 17, 2026 convective day was bigger than Colby: the same system put hail over 894 other tracked cities, 65 of them in Wisconsin. Nearest: Spencer (7 miles south, up to 1"); Dorchester (7 miles north, up to 0"); Loyal (8 miles southwest, up to 1").
These maps are stills from Colby's May 17, 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 Colby, 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 0" hail means for Colby roofs
Hail under three-quarters of an inch stays below the National Weather Service severe threshold and rarely breaks shingles outright. But repeated small-hail events accelerate granule loss and shorten roof life — on older roofs, it's still worth a conversation.
Track hail over Colby on the live map
Radar updates in real time, spotter reports appear on the map as they're filed, and the full Colby storm history — this May 17, 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
4 recorded storm days in Colby, WI
