This alert expired on 27 May 2026 at 10:30 UTC. It is kept here as a record.
It is the 2nd strongest of the 30 detections recorded within 20 km of this point since 1 May 2026. Another comparable one was recorded here earlier the same day. 15 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued May 27 at 3:37AM CDT until May 27 at 5:30AM CDT by NWS Houston/Galveston TX
An estimated 343,466 people live within 50 km of this point.
Nearby, since 1 May 2026
- July 23, 2026 · score 43 · 6.4 km
- June 17, 2026 · score 43 · 11.0 km
- May 23, 2026 · score 43 · 14.1 km
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 | 29.0971, -95.1743 |
| Nearest City | Lake Jackson (26 km) |
| Population Exposed | 343.5K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-27T08:37:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.6b2c0c29ce1421c613866e607726ef39 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Matagorda Bay; Galveston Bay; Coastal waters from Freeport to Matagorda Ship Channel TX out 20 NM; Coastal waters from High Island to Freeport TX out 20 NM; Waters from Freeport to Matagorda Ship Channel TX from 20 to 60 NM; Waters from High Island to Freeport TX from 20 to 60 NM |
| Headline | Special Marine Warning issued May 27 at 3:37AM CDT until May 27 at 5:30AM CDT by NWS Houston/Galveston TX |
| Expires | 2026-05-27T05:30:00-05:00 |
| SenderName | NWS Houston/Galveston TX |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.6b2c0c29ce1421c613866e607726ef39dbc5d8dc.001.1","noaa_urn:oid:2.49.0.1.840.0.50bdb78ee942ecce2765a64568ecd2a40765fbae.001.1"] |
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 Lake Jackson (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.