Storm report · Johnson

Hail in Iowa City Jun 17, 2026

The radar-estimated size surface caught this storm, reaching 0.5" aloft. NEXRAD logged no point detections over Iowa City this day.

Largest hailstone

0.5"

≈ pea to penny · radar-estimated size aloft
Homes in the hail footprint

3,086

Ground reports

0

none filed
Severity

The 8th most severe storm Iowa City has seen in the last 12 months

Storm severity score

Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.

2.5 /10
Hail size
13 /100

Largest hailstone — the top predictor of roof damage.

Homes exposed
70 /100

How many homes sit inside the storm's footprint.

Ground truth
0 /100

Independent storm reports filed with the NWS.

Two ways to read the storm

How Iowa City 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.

Radar-estimated hail size
Radar-estimated hail-size map of the storm over Iowa City, IA on Jun 17, 2026

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.

Max size 0.5"

Only the radar-estimated size surface resolved for Jun 17, 2026 — this storm produced no NEXRAD point detections over Iowa City, so there is one map to show, not two.

The storm in context

Where Jun 17, 2026 sits in Iowa City's hail record

This was Iowa City's 8th recorded hail day, arriving 7 days after the Jun 10, 2026 storm. By severity it ranks 8th of the 10 storms we have logged here. Radar put the day's largest stone over Iowa City at 0.5" — radar-estimated size aloft.

The Jun 17, 2026 convective day was bigger than Iowa City: the same system put hail over 294 other tracked cities, 33 of them in Iowa. Nearest: Lone Tree (14 miles south, up to 0.5"); Riverside (15 miles south, up to 0.5"); Kalona (17 miles southwest, up to 0.5").

These maps are stills from Iowa City's Jun 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.

Ground reports

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 Iowa City, 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.

Below the severe threshold

What 0.5" hail means for Iowa City 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.

What this storm is worth to a roofer

$37M

Potential roof exposure — 3,086 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
Illustrative jobs
15 jobs
Illustrative work
~$225K
Close just 0.5% of the 3,086 homes in this footprint at the average $15,000 roof job. Illustrative math, not a projection — your results depend on your outreach and how the market responds.
Claims from this storm can typically be filed until around June 2028 — the window to reach these homeowners while it's still open. Deadlines vary by policy and state.

Track hail over Iowa City on the live map

Radar updates in real time, spotter reports appear on the map as they're filed, and the full Iowa City storm history — this Jun 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

Iowa City hail history

10 recorded storm days in Iowa City, IA

← All hail in Iowa City

Other storms in Iowa City

A storm day here is a convective day — it runs from noon to noon UTC, so late-night hail is grouped with the afternoon storm that spawned it rather than split across two calendar dates. Ground reports are public-domain observations from the NOAA Storm Prediction Center. Radar surfaces are detections and estimates, not confirmed damage. Last updated Aug 3, 2026.