Tornado Rating unknown
2 WSW Thurman Washington County
“Brief Tornado lasted one minute. (BOU)”
— NOAA / SPC storm report
/ Storm field report · Washington
Hail in Lindon · May 21, 2026
The estimated-size surface reached 1.75" aloft; NEXRAD logged no point detections over Lindon that day. Open it on the live map to see the swath over the streets.
A tornado was also reported to the National Weather Service during this storm. The ground reports below show where it was filed.
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Peak hail signal 1.75" ≈ golf ball · radar-estimated size aloft
Homes in the hail footprint 196
Ground reports 7 4 hail · 3 tornado
Radar surfaces 1 Estimated size only
Convective day · May 21, 2026 · noon–noon UTC
Severity
The most severe storm Lindon has seen in the last 12 months
Composite score · 5.3 / 10
Storm severity score
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
5.3 /10
- Peak hail signal
- 44 /100
- Homes exposed
- 46 /100
- Ground truth
- 100 /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 Lindon saw the hail — from two instruments
May 21, 2026 · Lindon, CO
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.
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
1.75"
Only the radar-estimated size surface resolved for May 21, 2026 — this storm produced no NEXRAD point detections over Lindon, so there is one map to show, not two.
The storm in context
Where May 21, 2026 sits in Lindon's hail record.
This was Lindon's 1st recorded hail day — the first hail day in our records for the city. By severity it ranks 1st of the 5 storms we have logged here. Radar put the day's largest stone over Lindon at 1.75" — radar-estimated size aloft.
The May 21, 2026 convective day was bigger than Lindon: the same system put hail over 120 other tracked cities, 20 of them in Colorado. Nearest: Woodrow (11 miles west, up to 1.5"); Anton (17 miles northeast, up to 2"); Flagler (25 miles southeast, up to 2.25").
These maps are stills. In the app this date is one of 5 Lindon 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
7 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.
Tornado reports
3 reports Tornado Rating unknown
3 WNW Thurman Washington County
“Brief ground circulation. Report via NWSChat. (BOU)”
— NOAA / SPC storm report
Tornado Rating unknown
3 WSW Thurman Washington County
“Tornado lasted 4 minutes. (BOU)”
— NOAA / SPC storm report
Hail reports
4 reports Hail size 2.5"
6 S Lindon Washington County
“Report from mPING: Tennis Ball (2.50 in.). (BOU)”
— NOAA / SPC storm report
Hail size 2.75"
2 WNW Thurman Washington County
“(BOU)”
— NOAA / SPC storm report
Hail size 1"
5 NW Thurman Washington County
“Report from mPING: Quarter (1.00 in.). (BOU)”
— NOAA / SPC storm report
Hail size 1.25"
5 NW Thurman Washington County
“Report from mPING: Half Dollar (1.25 in.). (BOU)”
— 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 28 minutes, from to .
Reports came from Thurman — beyond Lindon itself.
High damage potential
What 1.75" hail means for Lindon 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.
196 homes × $12,000 avg. claim
Potential roof exposure
$2.4M
Potential roof exposure — 196 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 196 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 $41 on top of the $150 plan.
Lindon hail history
Other storms in Lindon.
5 recorded storm days in Lindon, CO
Estimated-size surface Storm date Lindon / CO
Aug 13, 2026
2.5" Estimated 2.5"
1 ground report Open report →
Estimated-size surface Storm date Lindon / CO
Jul 4, 2026
1.75" Signatures 1.75" Estimated 1"
No ground reports filed Open report →
Estimated-size surface Storm date Lindon / CO
Jul 3, 2026
2" Signatures 2" Estimated 1"
No ground reports filed Open report →
Estimated-size surface Storm date Lindon / CO
Jun 24, 2026
2.25" Estimated 2.25"
No ground reports filed 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 Aug 14, 2026.