Hail in Hopkinton · Apr 27, 2026
NEXRAD logged 2 hail signatures up to 0.5"; the estimated-size surface had no signal that day. Open it on the live map to see the swath over the streets.
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Convective day · Apr 27, 2026 · noon–noon UTC
Severity
The 7th most severe storm Hopkinton has seen in the last 12 months
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
- Peak hail signal
- 13 /100
- Homes exposed
- 47 /100
- Ground truth
- 0 /100
Largest radar-indicated size — a signal of damage potential, not confirmation.
How many homes sit inside the storm's footprint.
Independent storm reports filed with the NWS.
Evidence / storm surfaces
How Hopkinton 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.
Radar signature field 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 Apr 27, 2026 — the estimated-size swath had no hail signal to model for this storm, so there is one map to show, not two.
The storm in context
Where Apr 27, 2026 sits in Hopkinton's hail record.
This was Hopkinton's 6th recorded hail day, arriving 4 days after the Apr 23, 2026 storm. By severity it ranks 7th of the 10 storms we have logged here. Radar put the day's largest stone over Hopkinton at 0.5" — the largest NEXRAD radar signature.
The Apr 27, 2026 convective day was bigger than Hopkinton: the same system put hail over 1,188 other tracked cities, 16 of them in Iowa. Nearest: Monticello (9 miles southeast, up to 0.5"); Springville (17 miles southwest, up to 1"); Marion (26 miles southwest, up to 1.25").
These maps are stills. In the app this date is one of 10 Hopkinton storm dates on a live map — both surfaces, the reports, and a replay — and the same map is where you draw the swath. This page rebuilds nightly.
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.
No ground reports were filed with the National Weather Service for this storm over Hopkinton. That is common: a report depends on someone being there to see it and take the time to call it in. The radar surfaces above are the record here — the storm was detected from above even though no one on the ground logged it.
Below the severe threshold
What 0.5" hail means for Hopkinton roofs.
Radar signals under three-quarters of an inch stay below the National Weather Service severe threshold and generally indicate lower roof risk. Older or already-worn materials can still show effects, but radar alone cannot determine whether a specific roof was damaged.
Radar reading · not confirmed damage
Roofing exposure
What this storm is worth to a roofer.
Potential roof exposure
$2.7M
Potential roof exposure — 226 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
- Illustrative jobs
- 1 job
- Illustrative work
- ~$15K
Close just 0.5% of the 226 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.
Claim window
April 2028
Claims from this storm can typically be filed until around April 2028 — the window to reach these homeowners while it's still open. Deadlines vary by policy and state.
Names and phones for every home in the footprint: at most $47 on top of the $150 plan.
Hopkinton hail history
Other storms in Hopkinton.
Estimated-size surface Aug 11, 2026
0.5"
Estimated-size surface Aug 7, 2026
1.75"
Estimated-size surface Jul 3, 2026
1.25"
Estimated-size surface Jun 28, 2026
1"
Estimated-size surface Apr 23, 2026
1"
Estimated-size surface Apr 17, 2026
1.75"
Estimated-size surface Apr 15, 2026
0.5"
Estimated-size surface Apr 14, 2026
1"
Estimated-size surface Mar 10, 2026
0.5"The next storm won’t wait for you.
Set your territory and alerts today. When hail hits, use Overview to choose your streets and get moving.
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Web trial: 7 days free. Card required. $150/month after the trial unless cancelled.