This alert expired on 21 June 2026 at 15:00 UTC. It is kept here as a record.
It is the 5th strongest of the 40 detections recorded within 20 km of this point since 9 March 2026. The last comparable one was on 20 June 2026. 10 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued June 21 at 8:34AM CDT until June 21 at 10:00AM CDT by NWS Houston/Galveston TX
An estimated 783,173 people live within 50 km of this point.
Nearby, since 9 March 2026
- July 22, 2026 · score 48 · 5.5 km
- July 22, 2026 · score 52 · 6.0 km
- July 22, 2026 · score 48 · 6.3 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 48 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) | 48 / 100 |
| Our confidence | 80% |
| Coordinates | 29.5950, -94.8320 |
| Nearest City | La Porte (20 km) |
| Population Exposed | 783.2K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-21T13:34:00.000Z |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Galveston Bay; Coastal waters from High Island to Freeport TX out 20 NM |
| Headline | Special Marine Warning issued June 21 at 8:34AM CDT until June 21 at 10:00AM CDT by NWS Houston/Galveston TX |
| Expires | 2026-06-21T10:00:00-05:00 |
| 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 48/100, near La Porte (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.