Hail in Pasadena · Jul 21, 2026
NEXRAD logged 0 hail signatures up to 1"; the estimated-size surface had no signal that day. Open it on the live map to see the swath over the streets.
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Convective day · Jul 21, 2026 · noon–noon UTC
Severity
The 4th most severe storm Pasadena has seen in the last 12 months
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
- Peak hail signal
- 25 /100
- Homes exposed
- 0 /100
- Ground truth
- 0 /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 Pasadena saw the hail — from two instruments
Two instruments, one storm: NEXRAD logs the point signatures it detected overhead, while the estimated-size surface models how large the hail aloft could have grown. Agreement between them is not guaranteed — the gaps are where the model ran ahead of, or behind, the detections.
Radar signature field NEXRAD's hail signatures for this storm: the spots the radar detected from above. A detection overhead is not the same thing as a confirmed stone below.
Only the NEXRAD radar-signature surface resolved for Jul 21, 2026 — the estimated-size swath had no hail signal to model for this storm, so there is one map to show, not two.
The storm in context
Where Jul 21, 2026 sits in Pasadena's hail record.
This was Pasadena's 3rd recorded hail day, arriving 14 days after the Jul 7, 2026 storm. By severity it ranks 4th of the 4 storms we have logged here. Radar put the day's largest stone over Pasadena at 1" — the largest NEXRAD radar signature.
The Jul 21, 2026 convective day was bigger than Pasadena: the same system put hail over 703 other tracked cities, 9 of them in Texas. Nearest: Seabrook (0 miles north, up to 0"); Corpus Christi (205 miles southwest, up to 0.5"); Bishop (210 miles southwest, up to 0.5").
These maps are stills. In the app this date is one of 4 Pasadena 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
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.
No ground reports were filed with the National Weather Service for this storm over Pasadena. That is common: a report depends on someone being there to see it and take the time to call it in. The radar surfaces above are the record here — the storm was detected from above even though no one on the ground logged it.
Damage-capable hail signal
What 1" hail means for Pasadena 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
Pasadena hail history
Other storms in Pasadena.
Estimated-size surface Jul 22, 2026
1.5"
NEXRAD surface Jul 7, 2026
1"
Estimated-size surface Apr 30, 2026
1"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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Web trial: 7 days free. Card required. $150/month after the trial unless cancelled.