Hail size 2"
2 W Mountain Lake Cottonwood County
“(FSD)”
— NOAA / SPC storm report
/ Storm field report · Cottonwood
Hail in Mountain Lake · Apr 13, 2026
NEXRAD logged 5 hail signatures up to 1.75"; the estimated-size surface reached 1" aloft. Open it on the live map to see the swath over the streets.
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Peak hail signal 1.75" ≈ golf ball · the largest NEXRAD radar signature
Homes in the hail footprint 158
Ground reports 2 2 hail
Radar surfaces 2 NEXRAD + estimated size
Convective day · Apr 13, 2026 · noon–noon UTC
Severity
The 4th most severe storm Mountain Lake has seen in the last 12 months
Composite score · 4.2 / 10
Storm severity score
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
4.2 /10
- Peak hail signal
- 44 /100
- Homes exposed
- 44 /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 Mountain Lake saw the hail — from two instruments
Apr 13, 2026 · Mountain Lake, MN
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
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
1.75"
Detections
5
Radar-estimated hail size Surface resolved
Estimated size field The modeled maximum hail size across the swath, derived from radar aloft — the largest stone the storm could have supported, which is not necessarily what reached the ground.
Max size
1"
The storm in context
Where Apr 13, 2026 sits in Mountain Lake's hail record.
This was Mountain Lake's 1st recorded hail day — the first hail day in our records for the city. By severity it ranks 4th of the 14 storms we have logged here. Radar put the day's largest stone over Mountain Lake at 1.75" — the largest NEXRAD radar signature.
The Apr 13, 2026 convective day was bigger than Mountain Lake: the same system put hail over 467 other tracked cities, 71 of them in Minnesota. Nearest: Windom (5 miles west, up to 1.75"); Bingham Lake (7 miles south, up to 1.75"); Comfrey (9 miles northeast, up to 2").
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
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
2 reports Hail size 1.75"
1 S Mountain Lake Cottonwood County
“Spotter report of golf ball sized hail. (FSD)”
— NOAA / SPC storm report
High damage potential
What 1.75" hail means for Mountain Lake roofs.
Hail around an inch and a half is capable of cracking shingles, stripping granules, and denting gutters, vents, and siding. Risk is usually greatest near the strongest radar signal, but property-level damage still requires an on-site inspection.
Radar reading · not confirmed damage
Roofing exposure
What this storm is worth to a roofer.
158 homes × $12,000 avg. claim
Potential roof exposure
$1.9M
Potential roof exposure — 158 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 158 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
April 2028
Claims from this storm can typically be filed until around April 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 $33 on top of the $150 plan.
Mountain Lake hail history
Other storms in Mountain Lake.
14 recorded storm days in Mountain Lake, MN
Estimated-size surface Storm date Mountain Lake / MN
Sep 6, 2026
0.75" Estimated 0.75"
No ground reports filed Open report →
Estimated-size surface Storm date Mountain Lake / MN
Aug 7, 2026
1" Estimated 1"
No ground reports filed Open report →
Estimated-size surface Storm date Mountain Lake / MN
Jul 25, 2026
No ground reports filed Open report →
Estimated-size surface Storm date Mountain Lake / MN
Jul 6, 2026
1.75" Signatures 1.75" Estimated 1"
No ground reports filed Open report →
Estimated-size surface Storm date Mountain Lake / MN
Jul 4, 2026
0.75" Signatures 0.75"
No ground reports filed Open report →
Estimated-size surface Storm date Mountain Lake / MN
Jul 2, 2026
2" Signatures 2" Estimated 1.25"
No ground reports filed Open report →
Estimated-size surface Storm date Mountain Lake / MN
Jun 29, 2026
1" Signatures 1" Estimated 0.5"
6 ground reports Open report →
Estimated-size surface Storm date Mountain Lake / MN
Jun 27, 2026
0.5" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Mountain Lake / MN
Jun 9, 2026
0.5" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Mountain Lake / MN
May 25, 2026
1" Signatures 1" Estimated 0.75"
No ground reports filed Open report →
NEXRAD surface Storm date Mountain Lake / MN
May 18, 2026
2.5" Signatures 2.5"
No ground reports filed Open report →
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 →
Estimated-size surface Storm date Mountain Lake / MN
Apr 23, 2026
1" Signatures 1" Estimated 0.5"
No ground reports filed Open report →
The next storm won’t wait for you.
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 Sep 7, 2026.