NEXRAD logged 0 hail signatures up to 0"; the estimated-size surface reached 3.5" aloft. At 3.5" — baseball — this is a severe hail signal associated with roof damage. Open it on the live map to see the swath over the streets.
7-day free trial in the iPhone app. No card required to start.
For iPhone. Android coming soon.
Web trial: 7 days free. Card required. $150/month after the trial unless cancelled.
Convective day · Aug 19, 2026 · noon–noon UTC
Severity
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
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
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 signature field Where NEXRAD flagged hail as the storm passed — point signatures from the radar, which indicate hail overhead rather than confirm what landed.
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.
The storm in context
This was Arriba's 13th recorded hail day, arriving 22 days after the Jul 28, 2026 storm. By severity it ranks 3rd of the 15 storms we have logged here. Radar put the day's largest stone over Arriba at 3.5" — radar-estimated size aloft.
The Aug 19, 2026 convective day was bigger than Arriba: the same system put hail over 496 other tracked cities, 30 of them in Colorado. Nearest: Genoa (15 miles southwest, up to 0.75"); Flagler (17 miles northeast, up to 4"); Seibert (24 miles east, up to 3.25").
These maps are stills. In the app this date is one of 15 Arriba 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
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.
“Trained spotter reported hail mostly within the 1 inch range... however there were a few 3 inch hail stones that hit their property. Time estimated based on radar data. (BOU)”
— NOAA / SPC storm report
Storm forensics
Read from the arrival times and locations of the NOAA ground reports, not a radar-measured storm track.
Reports came from Thurman — beyond Arriba itself.
Severe hail signal
Two-inch-plus hail is capable of puncturing shingles, breaking skylights or windows, and heavily denting soft materials. The strongest radar bands warrant prompt inspection, but neither the signal nor the footprint confirms damage at a specific address.
Radar reading · not confirmed damage
Roofing exposure
Potential roof exposure
$2M
Potential roof exposure — 164 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
Close just 0.5% of the 164 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 $34 on top of the $150 plan.
Arriba hail history
Estimated-size surface 
Estimated-size surface 
Estimated-size surface 
Estimated-size surface 
Estimated-size surface 
Estimated-size surface 
Estimated-size surface 
Estimated-size surface 
Estimated-size surface 
Estimated-size surface 
Estimated-size surface 
Estimated-size surface 
Estimated-size surface See the hail, review your recommendations, and canvass with Overview on iPhone.
7-day free trial in the iPhone app. No card required to start.
For iPhone. Android coming soon.
Web trial: 7 days free. Card required. $150/month after the trial unless cancelled.