This alert expired on 11 May 2026 at 01:00 UTC. It is kept here as a record.
Another comparable one was recorded here earlier the same day. One more was recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 10 at 7:42PM CDT until May 10 at 8:00PM CDT by NWS Houston/Galveston TX
An estimated 203,387 people live within 50 km of this point.
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 43 out of 100, at 80 % 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) | 43 / 100 |
| Our confidence | 80% |
| Coordinates | 30.5443, -95.6586 |
| Nearest City | Huntsville (22 km) |
| Population Exposed | 203.4K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-11T00:42:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.f39a5b4919c9acc7db60d6605320a966358aa753.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Grimes, TX; Montgomery, TX; Walker, TX |
| Headline | Severe Thunderstorm Warning issued May 10 at 7:42PM CDT until May 10 at 8:00PM CDT by NWS Houston/Galveston TX |
| Expires | 2026-05-10T20:00:00-05:00 |
| 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 43/100, near Huntsville (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.