Hail size 1"
5 SSE Reiradon Hill Logan County
“(BOU)”
— NOAA / SPC storm report
/ Storm field report · Logan
Hail in Sterling · Jun 21, 2026
The estimated-size surface reached 1.5" aloft; NEXRAD logged no point detections over Sterling that day. Open it on the live map to see the swath over the streets.
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Peak hail signal 1.5" ≈ ping-pong ball · radar-estimated size aloft
Homes in the hail footprint 162
Ground reports 2 2 hail
Radar surfaces 1 Estimated size only
Convective day · Jun 21, 2026 · noon–noon UTC
Severity
The 10th most severe storm Sterling has seen in the last 12 months
Composite score · 3.9 / 10
Storm severity score
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
3.9 /10
- Peak hail signal
- 38 /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 Sterling saw the hail — from two instruments
Jun 21, 2026 · Sterling, 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
1.5"
Only the radar-estimated size surface resolved for Jun 21, 2026 — this storm produced no NEXRAD point detections over Sterling, so there is one map to show, not two.
The storm in context
Where Jun 21, 2026 sits in Sterling's hail record.
This was Sterling's 10th recorded hail day, arriving 12 days after the Jun 9, 2026 storm. By severity it ranks 10th of the 24 storms we have logged here. Radar put the day's largest stone over Sterling at 1.5" — radar-estimated size aloft.
The Jun 21, 2026 convective day was bigger than Sterling: the same system put hail over 415 other tracked cities, 30 of them in Colorado. Nearest: Fleming (18 miles east, up to 1.5"); Akron (32 miles south, up to 1.25"); Haxtun (32 miles east, up to 1.5").
These maps are stills. In the app this date is one of 24 Sterling 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"
4 SE Reiradon Hill Logan County
“(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.
Reports came from Reiradon Hill — beyond Sterling itself.
High damage potential
What 1.5" hail means for Sterling 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.
162 homes × $12,000 avg. claim
Potential roof exposure
$1.9M
Potential roof exposure — 162 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 162 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
June 2028
Claims from this storm can typically be filed until around June 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 $34 on top of the $150 plan.
Sterling hail history
Other storms in Sterling.
24 recorded storm days in Sterling, CO
Estimated-size surface Storm date Sterling / CO
Sep 5, 2026
2" Estimated 2"
1 ground report Open report →
Estimated-size surface Storm date Sterling / CO
Aug 26, 2026
0.5" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Sterling / CO
Aug 25, 2026
0.5" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Sterling / CO
Aug 15, 2026
0.5" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Sterling / CO
Aug 14, 2026
0.5" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Sterling / CO
Aug 12, 2026
1.75" Estimated 1.75"
3 ground reports Open report →
Estimated-size surface Storm date Sterling / CO
Jul 28, 2026
4" Signatures 4" Estimated 3"
No ground reports filed Open report →
Estimated-size surface Storm date Sterling / CO
Jul 22, 2026
1" Signatures 1" Estimated 1"
5 ground reports Open report →
Estimated-size surface Storm date Sterling / CO
Jul 4, 2026
1.25" Signatures 1.25" Estimated 0.75"
No ground reports filed Open report →
Estimated-size surface Storm date Sterling / CO
Jul 3, 2026
2.5" Signatures 2.5" Estimated 1.75"
1 ground report Open report →
Estimated-size surface Storm date Sterling / CO
Jul 2, 2026
2.75" Signatures 2.75" Estimated 1.25"
2 ground reports Open report →
Estimated-size surface Storm date Sterling / CO
Jun 30, 2026
4" Signatures 4" Estimated 3"
4 ground reports Open report →
Estimated-size surface Storm date Sterling / CO
Jun 23, 2026
0.5" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Sterling / CO
Jun 22, 2026
2.75" Estimated 2.75"
9 ground reports Open report →
Estimated-size surface Storm date Sterling / CO
Jun 9, 2026
1" Signatures 1" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Sterling / CO
Jun 8, 2026
1" Signatures 1" Estimated 0.5"
1 ground report Open report →
NEXRAD surface Storm date Sterling / CO
Jun 4, 2026
0.75" Signatures 0.75"
No ground reports filed Open report →
Estimated-size surface Storm date Sterling / CO
Jun 1, 2026
1" Signatures 1" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Sterling / CO
May 30, 2026
1" Signatures 1" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Sterling / CO
May 29, 2026
No ground reports filed Open report →
Estimated-size surface Storm date Sterling / CO
May 21, 2026
1" Estimated 1"
No ground reports filed Open report →
Estimated-size surface Storm date Sterling / CO
May 16, 2026
2.25" Signatures 2.25" Estimated 1.25"
No ground reports filed Open report →
Estimated-size surface Storm date Sterling / CO
May 9, 2026
1" Signatures 1" Estimated 0.75"
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 6, 2026.