Hail size 1.5"
4 E Westboro Atchison County
“Delayed report. (EAX)”
— NOAA / SPC storm report
/ Storm field report · Atchison
Hail in Tarkio · May 18, 2026
NEXRAD logged 42 hail signatures up to 2.5"; the estimated-size surface reached 1.25" 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.
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Peak hail signal 2.5" ≈ baseball · the largest NEXRAD radar signature
Homes in the hail footprint 931
Ground reports 2 1 hail · 1 wind
Radar surfaces 2 NEXRAD + estimated size
Convective day · May 18, 2026 · noon–noon UTC
Severity
The most severe storm Tarkio has seen in the last 12 months
Composite score · 5.7 / 10
Storm severity score
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
5.7 /10
- Peak hail signal
- 63 /100
- Homes exposed
- 59 /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 Tarkio saw the hail — from two instruments
May 18, 2026 · Tarkio, MO
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 signatures Surface resolved
Radar signature field 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
2.5"
Detections
42
Radar-estimated hail size Surface resolved
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
1.25"
The storm in context
Where May 18, 2026 sits in Tarkio's hail record.
This was Tarkio's 7th recorded hail day, arriving 1 day after the May 17, 2026 storm. By severity it ranks 1st of the 11 storms we have logged here. Radar put the day's largest stone over Tarkio at 2.5" — the largest NEXRAD radar signature.
The May 18, 2026 convective day was bigger than Tarkio: the same system put hail over 726 other tracked cities, 59 of them in Missouri. Nearest: Rock Port (6 miles northwest, up to 2.5"); Westboro (6 miles northeast, up to 1.75"); Shenandoah (10 miles north, up to 1.75").
These maps are stills. In the app this date is one of 11 Tarkio 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 reportWind reports
1 report Wind gust 60 mph
Tarkio Atchison County
“Public relayed 60 mph winds with initial storms moving through. Time estimated from radar. (EAX)”
— 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 18 minutes, from to .
Reports came from Westboro — beyond Tarkio itself.
Severe hail signal
What 2.5" hail means for Tarkio 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.
931 homes × $12,000 avg. claim
Potential roof exposure
$11M
Potential roof exposure — 931 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
- Illustrative jobs
- 5 jobs
- Illustrative work
- ~$75K
Close just 0.5% of the 931 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
May 2028
Claims from this storm can typically be filed until around May 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 $196 on top of the $150 plan.
Tarkio hail history
Other storms in Tarkio.
11 recorded storm days in Tarkio, MO
Estimated-size surface Storm date Tarkio / MO
Aug 9, 2026
1.25" Estimated 1.25"
No ground reports filed Open report →
Estimated-size surface Storm date Tarkio / MO
Jul 8, 2026
1" Signatures 1" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Tarkio / MO
Jul 3, 2026
1" Signatures 1"
No ground reports filed Open report →
Estimated-size surface Storm date Tarkio / MO
Jun 30, 2026
0.5" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Tarkio / MO
May 17, 2026
1.25" Signatures 1.25" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Tarkio / MO
May 16, 2026
1" Signatures 1" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Tarkio / MO
Apr 26, 2026
1" Signatures 1" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Tarkio / MO
Apr 23, 2026
1.25" Signatures 1.25" Estimated 0.75"
No ground reports filed Open report →
Estimated-size surface Storm date Tarkio / MO
Apr 3, 2026
2" Signatures 2" Estimated 1"
3 ground reports Open report →
Estimated-size surface Storm date Tarkio / MO
Mar 5, 2026
1.75" Signatures 1.75" Estimated 0.75"
No ground reports filed Open report →
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Set your territory and alerts today. When hail hits, use Overview to choose your streets and get moving.
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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 10, 2026.