This alert expired on 28 August 2026 at 19:45 UTC. It is kept here as a record.
No stronger detection stands among the 28 recorded within 20 km of this point since 1 May 2026 — 14 others scored the same. Another comparable one was recorded here earlier the same day.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued August 28 at 2:31PM CDT until August 28 at 2:45PM CDT by NWS Houston/Galveston TX
An estimated 3,528,786 people live within 50 km of this point.
Nearby, since 1 May 2026
- May 23, 2026 · score 52 · 6.5 km
- August 28, 2026 · score 52 · 10.2 km
- May 23, 2026 · score 52 · 10.7 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 52 out of 100, at 81 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | medium |
| Calamity Score (ours) | 52 / 100 |
| Our confidence | 81% |
| Coordinates | 29.4244, -95.2644 |
| Nearest City | Alvin (2 km) |
| Population Exposed | 3.5M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-28T19:31:00.000Z |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Brazoria, TX |
| Headline | Severe Thunderstorm Warning issued August 28 at 2:31PM CDT until August 28 at 2:45PM CDT by NWS Houston/Galveston TX |
| Expires | 2026-08-28T14:45:00-05:00 |
| SenderName | NWS Houston/Galveston TX |
| HasExactCoords | true |
Safety Information
Always follow official guidance from your local emergency management agency. This platform provides scientific monitoring data and is not a substitute for official warnings. If you are in immediate danger, contact your local emergency number.
Series begins 10 February 2026. Comparisons refer to that period only. Collection gap: 14-26 August 2026.
This data is aggregated algorithmically from scientific sources. Not a replacement for official emergency warnings.
Calamity.live data shows a weather event with CalamityScore 52/100, near Alvin (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.