Hail size 1"
La Porte City Black Hawk County
“Nickel to quarter sized hail in La Porte City. (DMX)”
— NOAA / SPC storm report
/ Storm field report · Black Hawk
Hail in La Porte City · Apr 15, 2026
The estimated-size surface reached 1" aloft; NEXRAD logged no point detections over La Porte City that day. Open it on the live map to see the swath over the streets.
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Peak hail signal 1" ≈ quarter · radar-estimated size aloft
Homes in the hail footprint 683
Ground reports 2 2 hail
Radar surfaces 1 Estimated size only
Convective day · Apr 15, 2026 · noon–noon UTC
Severity
The 4th most severe storm La Porte City has seen in the last 12 months
Composite score · 3.4 / 10
Storm severity score
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
3.4 /10
- Peak hail signal
- 25 /100
- Homes exposed
- 57 /100
- Ground truth
- 33 /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 La Porte City saw the hail — from two instruments
Apr 15, 2026 · La Porte City, 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.
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
1"
Only the radar-estimated size surface resolved for Apr 15, 2026 — this storm produced no NEXRAD point detections over La Porte City, so there is one map to show, not two.
The storm in context
Where Apr 15, 2026 sits in La Porte City's hail record.
This was La Porte City's 2nd recorded hail day, arriving 1 day after the Apr 14, 2026 storm. By severity it ranks 4th of the 8 storms we have logged here. Radar put the day's largest stone over La Porte City at 1" — radar-estimated size aloft.
The Apr 15, 2026 convective day was bigger than La Porte City: the same system put hail over 425 other tracked cities, 127 of them in Iowa. Nearest: Vinton (10 miles southeast, up to 0.5"); Buckingham (10 miles west, up to 0.75"); Garrison (14 miles south, up to 1").
These maps are stills. In the app this date is one of 8 La Porte City 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
2 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
2 reports Hail size 1"
1 W La Porte City Black Hawk County
“Report from mPING: Quarter (1.00 in.). (DMX)”
— 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 13 minutes, from to .
Damage-capable hail signal
What 1" hail means for La Porte City roofs.
Quarter-size and larger hail can bruise asphalt mats, remove granules, and dent exposed soft metal. The mapped footprint identifies an inspection priority area — it does not identify which individual roofs, if any, sustained damage.
Radar reading · not confirmed damage
Roofing exposure
What this storm is worth to a roofer.
683 homes × $12,000 avg. claim
Potential roof exposure
$8.2M
Potential roof exposure — 683 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
- Illustrative jobs
- 3 jobs
- Illustrative work
- ~$45K
Close just 0.5% of the 683 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 $143 on top of the $150 plan.
La Porte City hail history
Other storms in La Porte City.
8 recorded storm days in La Porte City, IA
Estimated-size surface Storm date La Porte City / IA
Aug 10, 2026
0.75" Estimated 0.75"
No ground reports filed Open report →
Estimated-size surface Storm date La Porte City / IA
Aug 7, 2026
1.25" Estimated 1.25"
No ground reports filed Open report →
Estimated-size surface Storm date La Porte City / IA
Jul 2, 2026
2" Signatures 2" Estimated 1"
No ground reports filed Open report →
Estimated-size surface Storm date La Porte City / IA
Jun 28, 2026
1.25" Signatures 1.25" Estimated 0.75"
No ground reports filed Open report →
Estimated-size surface Storm date La Porte City / IA
Jun 10, 2026
0.5" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date La Porte City / IA
Apr 17, 2026
0.75" Signatures 0.75"
No ground reports filed Open report →
Estimated-size surface Storm date La Porte City / IA
Apr 14, 2026
1.5" Estimated 1.5"
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 11, 2026.