/ Storm field report · Clarke

Hail in Osceola · Mar 15, 2026

NEXRAD logged 2 hail signatures up to 0.75"; the estimated-size surface had no signal that day. Open it on the live map to see the swath over the streets.

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Peak hail signal 0.75" ≈ penny to nickel · the largest NEXRAD radar signature
Homes in the hail footprint 44
Ground reports 0 none filed
Radar surfaces 1 NEXRAD only

Convective day · Mar 15, 2026 · noon–noon UTC

Severity

The 6th most severe storm Osceola has seen in the last 12 months

Composite score · 2.0 / 10
Storm severity score

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

2.0 /10
Peak hail signal
19 /100

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

Homes exposed
33 /100

How many homes sit inside the storm's footprint.

Ground truth
0 /100

Independent storm reports filed with the NWS.

Evidence / storm surfaces

How Osceola saw the hail — from two instruments

Mar 15, 2026 · Osceola, IA

The maps here read the same storm from two angles — point detections from NEXRAD, and modeled hail size aloft. Where the two disagree is informative: it marks where estimated size outran the signatures, or trailed them.

NEXRAD radar signatures Surface resolved
NEXRAD radar-signature map of the hail storm over Osceola, IA on Mar 15, 2026 Radar signature field

Where NEXRAD flagged hail as the storm passed — point signatures from the radar, which indicate hail overhead rather than confirm what landed.

Max size 0.75" Detections 2

Only the NEXRAD radar-signature surface resolved for Mar 15, 2026 — the estimated-size swath had no hail signal to model for this storm, so there is one map to show, not two.

The storm in context

Where Mar 15, 2026 sits in Osceola's hail record.

This was Osceola's 2nd recorded hail day, arriving 10 days after the Mar 5, 2026 storm. By severity it ranks 6th of the 10 storms we have logged here. Radar put the day's largest stone over Osceola at 0.75" — the largest NEXRAD radar signature.

The Mar 15, 2026 convective day was bigger than Osceola: the same system put hail over 695 other tracked cities, 4 of them in Iowa. Nearest: Kalona (117 miles east, up to 1"); Riverside (122 miles east, up to 1"); Iowa City (132 miles east, up to 0.75").

These maps are stills. In the app this date is one of 10 Osceola 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

No 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.

Nobody on the ground filed a report over Osceola for this date, which says more about who was watching than about the storm: spotter reports only exist where there is an observer. The radar surfaces above carry the evidence for this one.

Near the severe threshold

What 0.75" hail means for Osceola roofs.

A signal this size sits near the National Weather Service severe threshold. Aging shingles and soft metals such as vents, flashing, and gutters may be more vulnerable; roof age, wind, and material condition all matter, and only an inspection can confirm damage.

Radar reading · not confirmed damage

Roofing exposure

What this storm is worth to a roofer.

44 homes × $12,000 avg. claim

Potential roof exposure

$528K

Potential roof exposure — 44 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.

Claim window

March 2028

Claims from this storm can typically be filed until around March 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 $9 on top of the $150 plan.

Osceola hail history

10 recorded storm days in Osceola, IA

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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 5, 2026.