Wind gust 64 mph
3 NE Lone Tree Douglas County
“AWOS station KAPA 2 SSE Centennial. (BOU)”
— NOAA / SPC storm report
/ Storm field report · Douglas
Hail in Castle Rock · Aug 15, 2026
Hit 28 days ago
NEXRAD logged 0 hail signatures up to 0"; the estimated-size surface reached 1.25" aloft. Open it on the live map to see the swath over the streets.
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Peak hail signal 1.25" ≈ half-dollar · radar-estimated size aloft
Homes in the hail footprint 10,282
Ground reports 1 1 wind
Radar surfaces 2 NEXRAD + estimated size
Convective day · Aug 15, 2026 · noon–noon UTC
Severity
The 4th most severe storm Castle Rock has seen in the last 12 months
Composite score · 4.1 / 10
Storm severity score
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
4.1 /10
- Peak hail signal
- 31 /100
- Homes exposed
- 80 /100
- Ground truth
- 17 /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 Castle Rock saw the hail — from two instruments
Aug 15, 2026 · Castle Rock, CO
We map this storm two ways: the NEXRAD radar signatures the storm produced overhead, and the radar-estimated size of the hail in the air. The two surfaces don’t have to match — where they diverge is where estimated size aloft ran ahead of, or behind, what the signatures caught.
NEXRAD radar signatures Surface resolved
Radar signature field NEXRAD radar signatures — the point detections the storm produced overhead. A signature is where the radar saw hail, not a confirmed stone on the ground.
Max size
0"
Detections
0
Radar-estimated hail size Surface resolved
Estimated size field Maximum hail size as estimated from radar aloft. Treat it as the storm's ceiling — the largest supportable stone — rather than a ground measurement.
Max size
1.25"
The storm in context
Where Aug 15, 2026 sits in Castle Rock's hail record.
This was Castle Rock's 11th recorded hail day, arriving 1 day after the Aug 14, 2026 storm. By severity it ranks 4th of the 14 storms we have logged here. Radar put the day's largest stone over Castle Rock at 1.25" — radar-estimated size aloft.
The Aug 15, 2026 convective day was bigger than Castle Rock: the same system put hail over 188 other tracked cities, 30 of them in Colorado. Nearest: Parker (9 miles northeast, up to 1.25"); Littleton (13 miles northwest, up to 1.5"); Morrison (21 miles northwest, up to 1.5").
These maps are stills. In the app this date is one of 14 Castle Rock 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
1 report 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.
Wind reports
1 reportStorm 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 Lone Tree — beyond Castle Rock itself.
Damage-capable hail signal
What 1.25" hail means for Castle Rock roofs.
Quarter-size and larger hail can bruise asphalt mats, remove granules, and dent exposed soft metal. The mapped footprint identifies an inspection priority area — it does not identify which individual roofs, if any, sustained damage.
Radar reading · not confirmed damage
Roofing exposure
What this storm is worth to a roofer.
10,282 homes × $12,000 avg. claim
Potential roof exposure
$123M
Potential roof exposure — 10,282 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
- Illustrative jobs
- 51 jobs
- Illustrative work
- ~$765K
Close just 0.5% of the 10,282 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
August 2028
Claims from this storm can typically be filed until around August 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 $2,159 on top of the $150 plan.
Castle Rock hail history
Other storms in Castle Rock.
14 recorded storm days in Castle Rock, CO
Estimated-size surface Storm date Castle Rock / CO
Sep 6, 2026
0.5" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Castle Rock / CO
Aug 26, 2026
1" Estimated 1"
2 ground reports Open report →
Estimated-size surface Storm date Castle Rock / CO
Aug 22, 2026
0.75" Estimated 0.75"
No ground reports filed Open report →
Estimated-size surface Storm date Castle Rock / CO
Aug 14, 2026
0.75" Estimated 0.75"
No ground reports filed Open report →
Estimated-size surface Storm date Castle Rock / CO
Jul 29, 2026
1.25" Signatures 1.25" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Castle Rock / CO
Jul 28, 2026
1.75" Signatures 1.75" Estimated 1"
No ground reports filed Open report →
NEXRAD surface Storm date Castle Rock / CO
Jul 25, 2026
0.75" Signatures 0.75"
No ground reports filed Open report →
Estimated-size surface Storm date Castle Rock / CO
Jun 26, 2026
1" Signatures 1"
No ground reports filed Open report →
Estimated-size surface Storm date Castle Rock / CO
Jun 8, 2026
1" Estimated 1"
2 ground reports Open report →
Estimated-size surface Storm date Castle Rock / CO
Jun 3, 2026
1.75" Signatures 1.75" Estimated 1.25"
1 ground report Open report →
Estimated-size surface Storm date Castle Rock / CO
Jun 1, 2026
1.75" Signatures 1.75" Estimated 1"
1 ground report Open report →
Estimated-size surface Storm date Castle Rock / CO
May 29, 2026
1" Signatures 1" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Castle Rock / CO
May 17, 2026
1" Signatures 1"
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 Sep 7, 2026.