Right now
The most recent data we hold from NOAA arrived 8 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
Nothing else has been detected within 20 km in the last 24 hours.
This alert expired on 20 May 2026 at 13:30 UTC. It is kept here as a record.
No stronger detection stands among the 5 recorded within 20 km of this point since 20 May 2026 — 4 others scored the same.
What the source measured
NOAA reported: Special Marine Warning issued May 20 at 6:59AM CDT until May 20 at 8:30AM CDT by NWS Houston/Galveston 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 62 % 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 | 62% |
| Coordinates | 27.2512, -96.4251 |
| Nearest City | Portland (113 km) |
| Impact Tier | minor |
| Timestamp | 2026-05-20T11:59:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.4b13ec9725faedae4c0477cad42f6aaa |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | 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; Waters from Baffin Bay to Port Aransas from 20 to 60 NM; Waters from Port Aransas to Matagorda Ship Channel from 20 to 60 NM; Laguna Madre From the Port Of Brownsville to the Arroyo Colorado; Laguna Madre From The Arroyo Colorado To 5 NM North Of Port Mansfield TX; Laguna Madre From 5 nm North Of Port Mansfield To Baffin Bay TX; Coastal waters from Port Mansfield TX to the Rio Grande River out 20 NM; Coastal waters from Baffin Bay to Port Mansfield TX out 20 NM; Waters from Port Mansfield TX to the Rio Grande River from 20 to 60 NM; Waters from Baffin Bay to Port Mansfield TX from 20 to 60 NM and 1 more areas |
| Headline | Special Marine Warning issued May 20 at 6:59AM CDT until May 20 at 8:30AM CDT by NWS Houston/Galveston TX |
| Expires | 2026-05-20T08:30:00-05:00 |
| SenderName | NWS Houston/Galveston TX |
| HasExactCoords | true |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.4b13ec9725faedae4c0477cad42f6aaa432aa836.001.1","noaa_urn:oid:2.49.0.1.840.0.c07d4bbfc7def1127dbf1dc100824df1119c47dd.001.1","noaa_urn:oid:2.49.0.1.840.0.9623677e757538755a5664c8848a14849d4a8610.001.1","noaa_urn:oid:2.49.0.1.840.0.3483909c96a382766583e4b6c738bae44cbc8cf5.001.1"] |
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.
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