This alert expired on 11 May 2026 at 06:15 UTC. It is kept here as a record.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 11 at 12:45AM CDT until May 11 at 1:15AM CDT by NWS Houston/Galveston TX
An estimated 251,850 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 | 30.0080, -96.1420 |
| Nearest City | Brenham (31 km) |
| Population Exposed | 251.8K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-11T05:45:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.01b042fb01d6a4bf005761b3e7b7295dc74a0522.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Austin, TX; Harris, TX; Waller, TX; Washington, TX |
| Headline | Severe Thunderstorm Warning issued May 11 at 12:45AM CDT until May 11 at 1:15AM CDT by NWS Houston/Galveston TX |
| Expires | 2026-05-11T01:15:00-05:00 |
| 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 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.