Hail in Harper · Apr 17, 2026
NEXRAD logged 28 hail signatures up to 2.5"; the estimated-size surface reached 1.75" aloft. At 2.5" — baseball — this is a severe hail signal associated with roof damage. Open it on the live map to see the swath over the streets.
7-day free trial in the iPhone app. No card required to start.
For iPhone. Android coming soon.
Web trial: 7 days free. Card required. $150/month after the trial unless cancelled.
Convective day · Apr 17, 2026 · noon–noon UTC
Severity
The 4th most severe storm Harper 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
- 63 /100
- Homes exposed
- 44 /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 Harper saw the hail — from two instruments
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 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.
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.
The storm in context
Where Apr 17, 2026 sits in Harper's hail record.
This was Harper's 4th recorded hail day, arriving 38 days after the Mar 10, 2026 storm. By severity it ranks 4th of the 17 storms we have logged here. Radar put the day's largest stone over Harper at 2.5" — the largest NEXRAD radar signature.
The Apr 17, 2026 convective day was bigger than Harper: the same system put hail over 1,016 other tracked cities, 144 of them in Kansas. Nearest: Anthony (9 miles southeast, up to 3.25"); Danville (11 miles east, up to 2.75"); Bluff City (18 miles southeast, up to 2.75").
These maps are stills. In the app this date is one of 17 Harper 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.
For this storm over Harper, 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.
Severe hail signal
What 2.5" hail means for Harper roofs.
Two-inch-plus hail is capable of puncturing shingles, breaking skylights or windows, and heavily denting soft materials. The strongest radar bands warrant prompt inspection, but neither the signal nor the footprint confirms damage at a specific address.
Radar reading · not confirmed damage
Roofing exposure
What this storm is worth to a roofer.
Potential roof exposure
$1.9M
Potential roof exposure — 155 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 155 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 $33 on top of the $150 plan.
Harper hail history
Other storms in Harper.
Sep 15, 2026
0.5"
Estimated-size surface Sep 12, 2026
2.5"
Estimated-size surface Jul 11, 2026
1.25"
Estimated-size surface Jun 26, 2026
1"
Estimated-size surface Jun 25, 2026
0.5"
Estimated-size surface Jun 21, 2026
2"
Estimated-size surface Jun 20, 2026
0.75"
Estimated-size surface Jun 18, 2026
1.25"
Estimated-size surface Jun 13, 2026
1.25"
Estimated-size surface Jun 1, 2026
1"
Estimated-size surface May 30, 2026
2.5"
Estimated-size surface May 29, 2026
1"
Estimated-size surface May 18, 2026
2"
Estimated-size surface Mar 10, 2026
1.25"
Estimated-size surface Mar 3, 2026
1.75"
Estimated-size surface Jan 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.
7-day free trial in the iPhone app. No card required to start.
For iPhone. Android coming soon.
Web trial: 7 days free. Card required. $150/month after the trial unless cancelled.