/ Storm field report · Lyon

Hail in Allen · Apr 23, 2026

NEXRAD logged 10 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.

A tornado was also reported to the National Weather Service during this storm. The ground reports below show where it was filed.

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Peak hail signal 1.5" ≈ ping-pong ball · the largest NEXRAD radar signature

Homes in the hail footprint 116

Ground reports 1 1 tornado

Radar surfaces 2 NEXRAD + estimated size

Convective day · Apr 23, 2026 · noon–noon UTC

Severity

The 2nd most severe storm Allen has seen in the last 12 months

Composite score · 3.8 / 10

Storm severity score

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

3.8 /10

Peak hail signal: 38 /100
Homes exposed: 41 /100
Ground truth: 33 /100

Evidence / storm surfaces

How Allen saw the hail — from two instruments

Apr 23, 2026 · Allen, KS

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.

NEXRAD radar-signature map of the hail storm over Allen, KS on Apr 23, 2026 — 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.

Max size 1.5" Detections 10

Radar-estimated hail-size map of the storm over Allen, KS on Apr 23, 2026 — Maximum hail size as estimated from radar aloft. Treat it as the storm's ceiling — the largest supportable stone — rather than a ground measurement.

Max size 0.75"

The storm in context

Where Apr 23, 2026 sits in Allen's hail record.

This was Allen's 3rd recorded hail day, arriving 6 days after the Apr 17, 2026 storm. By severity it ranks 2nd of the 15 storms we have logged here. Radar put the day's largest stone over Allen at 1.5" — the largest NEXRAD radar signature.

The Apr 23, 2026 convective day was bigger than Allen: the same system put hail over 703 other tracked cities, 147 of them in Kansas. Nearest: Admire (11 miles southeast, up to 1"); Eskridge (11 miles northeast, up to 1"); Council Grove (13 miles west, up to 1.75").

These maps are stills. In the app this date is one of 15 Allen 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

1 report 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.

Tornado reports

1 report

Tornado Rating unknown

6 S Allen Lyon County

12:06 AM UTC

“Report of tornado south of Admire on road L and 280. Relayed by Emergency Manager. Time Estimated radar. (TOP)”
— NOAA / SPC storm report

High damage potential

What 1.5" hail means for Allen 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.

116 homes × $12,000 avg. claim

Potential roof exposure

$1.4M

Potential roof exposure — 116 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 116 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 $24 on top of the $150 plan.

Allen hail history

15 recorded storm days in Allen, KS

← All hail in Allen

Radar-estimated hail-size map of the storm over Allen, KS on Sep 12, 2026

Estimated-size surface

Storm date Allen / KS

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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Open this storm on the live map → Start free trial

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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 Sep 13, 2026.

The 2nd most severe storm Allen has seen in the last 12 months

How Allen saw the hail — from two instruments

Where Apr 23, 2026 sits in Allen's hail record.

What people on the ground reported

Tornado reports

What 1.5" hail means for Allen roofs.

What this storm is worth to a roofer.

Other storms in Allen.

Sep 12, 2026

Aug 5, 2026

Jul 23, 2026

Jul 4, 2026

Jul 3, 2026

Jun 13, 2026

Jun 8, 2026

Jun 4, 2026

May 31, 2026

May 30, 2026

May 18, 2026

Apr 26, 2026

Apr 17, 2026

Apr 13, 2026

The next storm won’t wait for you.