/ Storm field report · Johnson

Hail in Lone Tree · Sep 16, 2026

Hit 5 days ago

The estimated-size surface reached 0.75" aloft; NEXRAD logged no point detections over Lone Tree 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 · radar-estimated size aloft
Homes in the hail footprint 655
Ground reports 0 none filed
Radar surfaces 1 Estimated size only

Convective day · Sep 16, 2026 · noon–noon UTC

Severity

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

Composite score · 2.5 / 10
Storm severity score

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

2.5 /10
Peak hail signal
19 /100

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

Homes exposed
56 /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 Lone Tree saw the hail — from two instruments

Sep 16, 2026 · Lone Tree, IA

Each storm gets two readings: the radar signatures NEXRAD recorded as the cells passed overhead, and a modeled estimate of hail size in the air. They are independent surfaces, so a mismatch between them is expected — and worth reading.

Radar-estimated hail size Surface resolved
Radar-estimated hail-size map of the storm over Lone Tree, IA on Sep 16, 2026 Estimated size field

Radar-estimated hail size over the swath. The model reports the biggest stone the storm could sustain in the air; what actually fell may have been smaller.

Max size 0.75"

Only the radar-estimated size surface resolved for Sep 16, 2026 — this storm produced no NEXRAD point detections over Lone Tree, so there is one map to show, not two.

The storm in context

Where Sep 16, 2026 sits in Lone Tree's hail record.

This was Lone Tree's 5th recorded hail day, arriving 91 days after the Jun 17, 2026 storm. By severity it ranks 2nd of the 6 storms we have logged here. Radar put the day's largest stone over Lone Tree at 0.75" — radar-estimated size aloft.

The Sep 16, 2026 convective day was bigger than Lone Tree: the same system put hail over 73 other tracked cities, 1 of them in Iowa. Nearest: Riverside (10 miles west, up to 0.75"); Coffeen (196 miles southeast, up to 0.5"); Bingham (202 miles southeast, up to 0.5").

These maps are stills. In the app this date is one of 6 Lone Tree 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.

No ground reports were filed with the National Weather Service for this storm over Lone Tree. That is common: a report depends on someone being there to see it and take the time to call it in. The radar surfaces above are the record here — the storm was detected from above even though no one on the ground logged it.

Near the severe threshold

What 0.75" hail means for Lone Tree 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.

655 homes × $12,000 avg. claim

Potential roof exposure

$7.9M

Potential roof exposure — 655 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.

Illustrative jobs
3 jobs
Illustrative work
~$45K

Close just 0.5% of the 655 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 $138 on top of the $150 plan.

Lone Tree hail history

6 recorded storm days in Lone Tree, 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 Sep 20, 2026.