This alert expired on 20 May 2026 at 10:30 UTC. It is kept here as a record.
No stronger detection stands among the 15 recorded within 20 km of this point since 19 May 2026 — 11 others scored the same. The last comparable one was on 19 May 2026. One more was recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued May 20 at 4:35AM CDT until May 20 at 5:30AM CDT by NWS Corpus Christi TX
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 22 out of 100, at 61 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v1. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 22 / 100 |
| Our confidence | 61% |
| Coordinates | 28.1642, -96.5877 |
| Nearest City | Portland (79 km) |
| Impact Tier | minor |
| Timestamp | 2026-05-20T09:35:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.961a5973782b02a04eccbb251cddafa8 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Baffin Bay and Upper Laguna Madre; Corpus Christi and Nueces Bays; Coastal waters from Baffin Bay to Port Aransas out 20 NM; Waters from Baffin Bay to Port Aransas from 20 to 60 NM; Corpus Christi and Nueces Bays; Copano, Aransas, and Redfish Bays; San Antonio, Mesquite, and Espiritu Santo Bays; Coastal waters from Baffin Bay to Port Aransas out 20 NM; Coastal waters from Port Aransas to Matagorda Ship Channel out 20 NM; 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 |
| Headline | Special Marine Warning issued May 20 at 4:35AM CDT until May 20 at 5:30AM CDT by NWS Corpus Christi TX |
| Expires | 2026-05-20T05:30:00-05:00 |
| SenderName | NWS Corpus Christi TX |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.961a5973782b02a04eccbb251cddafa846ab4ff7.001.1","noaa_urn:oid:2.49.0.1.840.0.911465d8bafc385dd02f86e27d7d1e8cb3ce892a.001.1","noaa_urn:oid:2.49.0.1.840.0.3c236c0238560b9d86c9ec5a8358e654a2ba0a23.001.1"] |
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 8 March 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.
Want to know when something happens in this area?
Calamity.live data shows a weather event with CalamityScore 22/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.