/ Storm field report · Pottawatomie

Hail in Onaga · Aug 18, 2026

Hit 25 days ago

The estimated-size surface reached 2.5" aloft; NEXRAD logged no point detections over Onaga that day. 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.

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Peak hail signal 2.5" ≈ baseball · radar-estimated size aloft
Homes in the hail footprint 1,376
Ground reports 2 1 hail · 1 wind
Radar surfaces 1 Estimated size only

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

Severity

The most severe storm Onaga has seen in the last 12 months

Composite score · 5.8 / 10
Storm severity score

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

5.8 /10
Peak hail signal
63 /100

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

Homes exposed
63 /100

How many homes sit inside the storm's footprint.

Ground truth
33 /100

Independent storm reports filed with the NWS.

Evidence / storm surfaces

How Onaga saw the hail — from two instruments

Aug 18, 2026 · Onaga, 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.

Radar-estimated hail size Surface resolved
Radar-estimated hail-size map of the storm over Onaga, KS on Aug 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 2.5"

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

The storm in context

Where Aug 18, 2026 sits in Onaga's hail record.

This was Onaga's 13th recorded hail day, arriving 3 days after the Aug 15, 2026 storm. By severity it ranks 1st of the 13 storms we have logged here. Radar put the day's largest stone over Onaga at 2.5" — radar-estimated size aloft.

The Aug 18, 2026 convective day was bigger than Onaga: the same system put hail over 309 other tracked cities, 47 of them in Kansas. Nearest: Havensville (9 miles southeast, up to 2.75"); Westmoreland (11 miles west, up to 1.75"); Vermillion (11 miles north, up to 0.75").

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

1 report
Hail size 1.25"
5 S Onaga Pottawatomie County

“(TOP)”

— NOAA / SPC storm report

Wind reports

1 report
Wind gust 60 mph
3 SE Wheaton Pottawatomie County

“Quarter sized hail also occurring. (TOP)”

— 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 14 minutes, from to .

Reports came from Wheaton — beyond Onaga itself.

Severe hail signal

What 2.5" hail means for Onaga 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.

1,376 homes × $12,000 avg. claim

Potential roof exposure

$17M

Potential roof exposure — 1,376 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.

Illustrative jobs
7 jobs
Illustrative work
~$105K

Close just 0.5% of the 1,376 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

August 2028

Claims from this storm can typically be filed until around August 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 $289 on top of the $150 plan.

Onaga hail history

Other storms in Onaga.

13 recorded storm days in Onaga, KS
← All hail in Onaga
Radar-estimated hail-size map of the storm over Onaga, KS on Aug 15, 2026 Estimated-size surface
Storm date Onaga / KS

Aug 15, 2026

0.5"
Estimated 0.5"
No ground reports filed Open report →
Radar-estimated hail-size map of the storm over Onaga, KS on Aug 13, 2026 Estimated-size surface
Storm date Onaga / KS

Aug 13, 2026

0.75"
Estimated 0.75"
No ground reports filed Open report →
Radar-estimated hail-size map of the storm over Onaga, KS on Jul 8, 2026 Estimated-size surface
Storm date Onaga / KS

Jul 8, 2026

1.75"
Signatures 1.75" Estimated 1"
No ground reports filed Open report →
Radar-estimated hail-size map of the storm over Onaga, KS on Jul 4, 2026 Estimated-size surface
Storm date Onaga / KS

Jul 4, 2026

1.5"
Signatures 1.5" Estimated 0.75"
No ground reports filed Open report →
Radar-estimated hail-size map of the storm over Onaga, KS on Jul 3, 2026 Estimated-size surface
Storm date Onaga / KS

Jul 3, 2026

1.5"
Signatures 1.5" Estimated 0.75"
No ground reports filed Open report →
Radar-estimated hail-size map of the storm over Onaga, KS on Jun 13, 2026 Estimated-size surface
Storm date Onaga / KS

Jun 13, 2026

1.25"
Estimated 1.25"
No ground reports filed Open report →
Radar-estimated hail-size map of the storm over Onaga, KS on Jun 4, 2026 Estimated-size surface
Storm date Onaga / KS

Jun 4, 2026

1.75"
Signatures 1.75" Estimated 1"
No ground reports filed Open report →
Radar-estimated hail-size map of the storm over Onaga, KS on May 29, 2026 Estimated-size surface
Storm date Onaga / KS

May 29, 2026

1"
Signatures 1" Estimated 0.75"
No ground reports filed Open report →
Radar-estimated hail-size map of the storm over Onaga, KS on May 18, 2026 Estimated-size surface
Storm date Onaga / KS

May 18, 2026

1.5"
Signatures 1.5" Estimated 0.5"
No ground reports filed Open report →
Radar-estimated hail-size map of the storm over Onaga, KS on May 17, 2026 Estimated-size surface
Storm date Onaga / KS

May 17, 2026

1"
Signatures 1" Estimated 0.5"
No ground reports filed Open report →
Radar-estimated hail-size map of the storm over Onaga, KS on Apr 26, 2026 Estimated-size surface
Storm date Onaga / KS

Apr 26, 2026

1.75"
Signatures 1.75" Estimated 0.5"
No ground reports filed Open report →
Radar-estimated hail-size map of the storm over Onaga, KS on Apr 9, 2026 Estimated-size surface
Storm date Onaga / KS

Apr 9, 2026

1"
Signatures 1" Estimated 0.5"
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 19, 2026.