This alert expired on 16 March 2026 at 02:45 UTC. It is kept here as a record.
No stronger detection stands among the 35 recorded within 20 km of this point since 16 March 2026 — 3 others scored the same.
What the source measured
NOAA reported: Special Marine Warning issued March 15 at 8:18PM CDT until March 15 at 9:45PM CDT by NWS Houston/Galveston TX
An estimated 3,097,330 people live within 50 km of this point.
Nearby, since 16 March 2026
- July 22, 2026 · score 52 · 3.2 km
- June 21, 2026 · score 48 · 8.0 km
- July 15, 2026 · score 41 · 9.9 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 52 out of 100, at 83 % 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 | 83% |
| Coordinates | 29.6043, -94.9143 |
| Nearest City | La Porte (13 km) |
| Population Exposed | 3.1M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-03-16T01:18:00.000Z |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Galveston Bay |
| Headline | Special Marine Warning issued March 15 at 8:18PM CDT until March 15 at 9:45PM CDT by NWS Houston/Galveston TX |
| Expires | 2026-03-15T21:45:00-05:00 |
| SenderName | NWS Houston/Galveston TX |
| HasExactCoords | true |
| Iem TypeSummary | M |
| Iem Magnitude | 40 |
| Iem Unit | MPH |
| Iem City | 1 S Highlands |
| Iem County | Harris |
| Iem State | TX |
| Iem Wfo | HGX |
| Iem Remark | Sensor at San Jacinto River at I-10 East HLNT2 measured a 40 mph wind gust. |
| MergedSources | [{"id":"iem_M_29.790_-95.060_1773625020000","source":"iem","severity":"low","severityValue":25,"timestamp":1773625020000,"latitude":29.79,"longitude":-95.06}] |
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 La Porte (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.