/ Storm field report · Sioux

Hail in Harrison · Sep 18, 2026

Hit 3 days ago

The estimated-size surface reached 1.75" aloft; NEXRAD logged no point detections over Harrison that day. Open it on the live map to see the swath over the streets.

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Peak hail signal 1.75" ≈ golf ball · radar-estimated size aloft
Homes in the hail footprint 701
Ground reports 1 1 wind
Radar surfaces 1 Estimated size only

Convective day · Sep 18, 2026 · noon–noon UTC

Severity

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

Composite score · 4.3 / 10
Storm severity score

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

4.3 /10
Peak hail signal
44 /100

Largest radar-indicated size — a signal of damage potential, not confirmation.

Homes exposed
57 /100

How many homes sit inside the storm's footprint.

Ground truth
17 /100

Independent storm reports filed with the NWS.

Evidence / storm surfaces

How Harrison saw the hail — from two instruments

Sep 18, 2026 · Harrison, NE

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-estimated hail size Surface resolved
Radar-estimated hail-size map of the storm over Harrison, NE on Sep 18, 2026 Estimated size field

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 1.75"

Only the radar-estimated size surface resolved for Sep 18, 2026 — this storm produced no NEXRAD point detections over Harrison, so there is one map to show, not two.

The storm in context

Where Sep 18, 2026 sits in Harrison's hail record.

This was Harrison's 13th recorded hail day, arriving 12 days after the Sep 6, 2026 storm. By severity it ranks 2nd of the 13 storms we have logged here. Radar put the day's largest stone over Harrison at 1.75" — radar-estimated size aloft.

The Sep 18, 2026 convective day was bigger than Harrison: the same system put hail over 157 other tracked cities, 9 of them in Nebraska. Nearest: Crawford (11 miles east, up to 1.75"); Glendo (59 miles west, up to 0.5"); Newcastle (84 miles north, up to 0.75").

These maps are stills. In the app this date is one of 13 Harrison 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.

Wind reports

1 report
Wind gust 62 mph
2 SW Harrison Sioux County

“Personal weather station. (CYS)”

— NOAA / SPC storm report

High damage potential

What 1.75" hail means for Harrison 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.

701 homes × $12,000 avg. claim

Potential roof exposure

$8.4M

Potential roof exposure — 701 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.

Illustrative jobs
4 jobs
Illustrative work
~$60K

Close just 0.5% of the 701 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

September 2028

Claims from this storm can typically be filed until around September 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 $147 on top of the $150 plan.

Harrison hail history

Other storms in Harrison.

13 recorded storm days in Harrison, NE
← All hail in Harrison
Radar-estimated hail-size map of the storm over Harrison, NE on Sep 6, 2026 Estimated-size surface
Storm date Harrison / NE

Sep 6, 2026

0.5"
Estimated 0.5"
No ground reports filed Open report →
Radar-estimated hail-size map of the storm over Harrison, NE on Aug 25, 2026 Estimated-size surface
Storm date Harrison / NE

Aug 25, 2026

2"
Estimated 2"
No ground reports filed Open report →
Radar-estimated hail-size map of the storm over Harrison, NE on Aug 23, 2026 Estimated-size surface
Storm date Harrison / NE

Aug 23, 2026

0.75"
Estimated 0.75"
No ground reports filed Open report →
Radar-estimated hail-size map of the storm over Harrison, NE on Aug 17, 2026 Estimated-size surface
Storm date Harrison / NE

Aug 17, 2026

2.25"
Estimated 2.25"
3 ground reports Open report →
Radar-estimated hail-size map of the storm over Harrison, NE on Aug 16, 2026 Estimated-size surface
Storm date Harrison / NE

Aug 16, 2026

0.5"
Estimated 0.5"
No ground reports filed Open report →
Radar-estimated hail-size map of the storm over Harrison, NE on Jul 28, 2026 Estimated-size surface
Storm date Harrison / NE

Jul 28, 2026

1"
Signatures 1" Estimated 0.75"
No ground reports filed Open report →
Radar-estimated hail-size map of the storm over Harrison, NE on Jun 28, 2026 Estimated-size surface
Storm date Harrison / NE

Jun 28, 2026

1.75"
Signatures 1.75" Estimated 1.5"
No ground reports filed Open report →
Radar-estimated hail-size map of the storm over Harrison, NE on Jun 26, 2026 Estimated-size surface
Storm date Harrison / NE

Jun 26, 2026

1.75"
Signatures 1.75" Estimated 1"
No ground reports filed Open report →
Radar-estimated hail-size map of the storm over Harrison, NE on Jun 22, 2026 Estimated-size surface
Storm date Harrison / NE

Jun 22, 2026

0.75"
Estimated 0.75"
No ground reports filed Open report →
Radar-estimated hail-size map of the storm over Harrison, NE on Jun 6, 2026 Estimated-size surface
Storm date Harrison / NE

Jun 6, 2026

1"
Signatures 1" Estimated 0.5"
No ground reports filed Open report →
Radar-estimated hail-size map of the storm over Harrison, NE on Jun 4, 2026 Estimated-size surface
Storm date Harrison / NE

Jun 4, 2026

1.25"
Signatures 1.25" Estimated 0.5"
No ground reports filed Open report →
Radar-estimated hail-size map of the storm over Harrison, NE on May 30, 2026 Estimated-size surface
Storm date Harrison / NE

May 30, 2026

2"
Signatures 2" Estimated 1.25"
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 Sep 19, 2026.