/ Storm field report · Cottonwood

Hail in Mountain Lake · Sep 6, 2026

Hit 6 days ago

The estimated-size surface reached 0.75" aloft; NEXRAD logged no point detections over Mountain Lake 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 238
Ground reports 0 none filed
Radar surfaces 1 Estimated size only

Convective day · Sep 6, 2026 · noon–noon UTC

Severity

The 10th most severe storm Mountain Lake has seen in the last 12 months

Composite score · 2.3 / 10
Storm severity score

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

2.3 /10
Peak hail signal
19 /100

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

Homes exposed
48 /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 Mountain Lake saw the hail — from two instruments

Sep 6, 2026 · Mountain Lake, MN

Two instruments, one storm: NEXRAD logs the point signatures it detected overhead, while the estimated-size surface models how large the hail aloft could have grown. Agreement between them is not guaranteed — the gaps are where the model ran ahead of, or behind, the detections.

Radar-estimated hail size Surface resolved
Radar-estimated hail-size map of the storm over Mountain Lake, MN on Sep 6, 2026 Estimated size field

Radar-estimated maximum hail size across the swath, modeled from radar aloft. It reflects the biggest stone the storm could support, which may differ from what actually fell.

Max size 0.75"

Only the radar-estimated size surface resolved for Sep 6, 2026 — this storm produced no NEXRAD point detections over Mountain Lake, so there is one map to show, not two.

The storm in context

Where Sep 6, 2026 sits in Mountain Lake's hail record.

This was Mountain Lake's 14th recorded hail day, arriving 30 days after the Aug 7, 2026 storm. By severity it ranks 10th of the 14 storms we have logged here. Radar put the day's largest stone over Mountain Lake at 0.75" — radar-estimated size aloft.

The Sep 6, 2026 convective day was bigger than Mountain Lake: the same system put hail over 608 other tracked cities, 41 of them in Minnesota. Nearest: Windom (5 miles west, up to 0.5"); Butterfield (12 miles southeast, up to 0.75"); Jackson (21 miles south, up to 0.75").

These maps are stills. In the app this date is one of 14 Mountain Lake 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 Mountain Lake. 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 Mountain Lake 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.

238 homes × $12,000 avg. claim

Potential roof exposure

$2.9M

Potential roof exposure — 238 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.

Illustrative jobs
1 job
Illustrative work
~$15K

Close just 0.5% of the 238 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 $50 on top of the $150 plan.

Mountain Lake hail history

14 recorded storm days in Mountain Lake, MN
Radar-estimated hail-size map of the storm over Mountain Lake, MN on Aug 7, 2026 Estimated-size surface
Storm date Mountain Lake / MN

Aug 7, 2026

1"
Estimated 1"
No ground reports filed Open report →
Radar-estimated hail-size map of the storm over Mountain Lake, MN on Jul 25, 2026 Estimated-size surface
Storm date Mountain Lake / MN

Jul 25, 2026

No ground reports filed Open report →
Radar-estimated hail-size map of the storm over Mountain Lake, MN on Jul 6, 2026 Estimated-size surface
Storm date Mountain Lake / MN

Jul 6, 2026

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

Jul 4, 2026

0.75"
Signatures 0.75"
No ground reports filed Open report →
Radar-estimated hail-size map of the storm over Mountain Lake, MN on Jul 2, 2026 Estimated-size surface
Storm date Mountain Lake / MN

Jul 2, 2026

2"
Signatures 2" Estimated 1.25"
No ground reports filed Open report →
Radar-estimated hail-size map of the storm over Mountain Lake, MN on Jun 29, 2026 Estimated-size surface
Storm date Mountain Lake / MN

Jun 29, 2026

1"
Signatures 1" Estimated 0.5"
6 ground reports Open report →
Radar-estimated hail-size map of the storm over Mountain Lake, MN on Jun 27, 2026 Estimated-size surface
Storm date Mountain Lake / MN

Jun 27, 2026

0.5"
Estimated 0.5"
No ground reports filed Open report →
Radar-estimated hail-size map of the storm over Mountain Lake, MN on Jun 9, 2026 Estimated-size surface
Storm date Mountain Lake / MN

Jun 9, 2026

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

May 25, 2026

1"
Signatures 1" Estimated 0.75"
No ground reports filed Open report →
NEXRAD radar-signature map of the hail storm over Mountain Lake, MN on May 18, 2026 NEXRAD surface
Storm date Mountain Lake / MN

May 18, 2026

2.5"
Signatures 2.5"
No ground reports filed Open report →
Radar-estimated hail-size map of the storm over Mountain Lake, MN on May 17, 2026 Estimated-size surface
Storm date Mountain Lake / MN

May 17, 2026

2.5"
Signatures 2.5" Estimated 1.75"
No ground reports filed Open report →
Radar-estimated hail-size map of the storm over Mountain Lake, MN on Apr 23, 2026 Estimated-size surface
Storm date Mountain Lake / MN

Apr 23, 2026

1"
Signatures 1" Estimated 0.5"
No ground reports filed Open report →
Radar-estimated hail-size map of the storm over Mountain Lake, MN on Apr 13, 2026 Estimated-size surface
Storm date Mountain Lake / MN

Apr 13, 2026

1.75"
Signatures 1.75" Estimated 1"
2 ground reports 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 7, 2026.