Hail size 1"
Robins Linn County
“Relayed via county EM. (DVN)”
— NOAA / SPC storm report
/ Storm field report · Linn
Hail in Marion · Apr 17, 2026
NEXRAD logged 28 hail signatures up to 1.5"; the estimated-size surface reached 0.75" aloft. Open it on the live map to see the swath over the streets.
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Peak hail signal 1.5" ≈ ping-pong ball · the largest NEXRAD radar signature
Homes in the hail footprint 1,929
Ground reports 6 6 hail
Radar surfaces 2 NEXRAD + estimated size
Convective day · Apr 17, 2026 · noon–noon UTC
Severity
The most severe storm Marion has seen in the last 12 months
Composite score · 5.4 / 10
Storm severity score
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
5.4 /10
- Peak hail signal
- 38 /100
- Homes exposed
- 66 /100
- Ground truth
- 100 /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 Marion saw the hail — from two instruments
Apr 17, 2026 · Marion, IA
Two instruments, one storm: NEXRAD logs the point signatures it detected overhead, while the estimated-size surface models how large the hail aloft could have grown. Agreement between them is not guaranteed — the gaps are where the model ran ahead of, or behind, the detections.
NEXRAD radar signatures Surface resolved
Radar signature field NEXRAD's hail signatures for this storm: the spots the radar detected from above. A detection overhead is not the same thing as a confirmed stone below.
Max size
1.5"
Detections
28
Radar-estimated hail size Surface resolved
Estimated size field Radar-estimated maximum hail size across the swath, modeled from radar aloft. It reflects the biggest stone the storm could support, which may differ from what actually fell.
Max size
0.75"
The storm in context
Where Apr 17, 2026 sits in Marion's hail record.
This was Marion's 3rd recorded hail day, arriving 3 days after the Apr 14, 2026 storm. By severity it ranks 1st of the 6 storms we have logged here. Radar put the day's largest stone over Marion at 1.5" — the largest NEXRAD radar signature.
The Apr 17, 2026 convective day was bigger than Marion: the same system put hail over 1,016 other tracked cities, 201 of them in Iowa. Nearest: Ely (7 miles south, up to 1.5"); Martelle (8 miles east, up to 1.5"); Lisbon (9 miles southeast, up to 1.5").
These maps are stills. In the app this date is one of 6 Marion 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
6 reports filed with the NWS
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.
Hail reports
6 reports Hail size 1"
Toddville Linn County
“Delayed report. Relayed via county EM. (DVN)”
— NOAA / SPC storm report
Hail size 1"
2 E Hiawatha Linn County
“Report from mPING: Quarter (1.00 in.). (DVN)”
— NOAA / SPC storm report
Hail size 1"
Hiawatha Linn County
“Relayed by county EM. (DVN)”
— NOAA / SPC storm report
Hail size 1"
3 ENE Cedar Rapids Linn County
“Photo of quarter size hail relayed via social media. Time estimated by radar. (DVN)”
— NOAA / SPC storm report
Hail size 1"
3 ESE Alburnett Linn County
“(DVN)”
— NOAA / SPC storm report
Storm forensics
How the storm moved
Timing and place names from NOAA ground reports
Read from the arrival times and locations of the NOAA ground reports, not a radar-measured storm track.
Hail was reported over 180 minutes, from to .
Reports came from Robins, Toddville, Hiawatha, Cedar Rapids, and Alburnett — beyond Marion itself.
High damage potential
What 1.5" hail means for Marion roofs.
Hail around an inch and a half is capable of cracking shingles, stripping granules, and denting gutters, vents, and siding. Risk is usually greatest near the strongest radar signal, but property-level damage still requires an on-site inspection.
Radar reading · not confirmed damage
Roofing exposure
What this storm is worth to a roofer.
1,929 homes × $12,000 avg. claim
Potential roof exposure
$23M
Potential roof exposure — 1,929 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
- Illustrative jobs
- 10 jobs
- Illustrative work
- ~$150K
Close just 0.5% of the 1,929 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 $405 on top of the $150 plan.
Marion hail history
Other storms in Marion.
6 recorded storm days in Marion, IA
Estimated-size surface Storm date Marion / IA
Jul 3, 2026
1.25" Signatures 1.25" Estimated 0.75"
No ground reports filed Open report →
Estimated-size surface Storm date Marion / IA
Apr 27, 2026
1.25" Signatures 1.25" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Marion / IA
Apr 23, 2026
1.75" Signatures 1.75" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Marion / IA
Apr 14, 2026
1" Estimated 1"
10 ground reports Open report →
NEXRAD surface Storm date Marion / IA
Mar 30, 2026
No ground reports filed Open report →
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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 tells you where to look. Only an inspection confirms damage at an address. Last updated Aug 3, 2026.