Hail in Grinnell Mar 30, 2026
Both radar surfaces caught this storm: NEXRAD logged 0 hail signatures up to 0", and the radar-estimated size reached 0" aloft.
0"
≈ pea to penny · radar-estimated size aloft0
0
none filedThe 8th most severe storm Grinnell 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 Grinnell 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 Mar 30, 2026 sits in Grinnell's hail record
This was Grinnell's 1st recorded hail day — the first hail day in our records for the city. By severity it ranks 8th of the 8 storms we have logged here. Radar put the day's largest stone over Grinnell at 0" — radar-estimated size aloft.
The Mar 30, 2026 convective day was bigger than Grinnell: the same system put hail over 313 other tracked cities, 78 of them in Iowa. Nearest: Gilman (9 miles northwest, up to 0"); Malcom (9 miles southeast, up to 0"); Kellogg (12 miles southwest, up to 1").
These maps are stills from Grinnell's Mar 30, 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 Grinnell 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 0" hail means for Grinnell 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 Grinnell on the live map
Radar updates in real time, spotter reports appear on the map as they're filed, and the full Grinnell storm history — this Mar 30, 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
8 recorded storm days in Grinnell, IA
Other storms in Grinnell
Jul 20, 2026
0.5"
Jul 3, 2026
1"
Jun 16, 2026
0.5"
May 15, 2026
1"
Apr 17, 2026
2.5"
Apr 15, 2026
0.5"
Apr 14, 2026
0.75"