Right now
The most recent data we hold from NOAA arrived 5 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 27 May 2026 at 10:30 UTC. It is kept here as a record.
It is the only one we have recorded within 20 km of this point since 27 May 2026.
What the source measured
NOAA reported: Special Marine Warning issued May 27 at 4:40AM CDT until May 27 at 5:30AM CDT by NWS Houston/Galveston TX
How we know
Confirmed by 12 independent sources, including NOAA.
Our own score for this event is 22 out of 100, at 70 % 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 | 70% |
| Coordinates | 28.8117, -94.8542 |
| Nearest City | Galveston (55 km) |
| Impact Tier | minor |
| Timestamp | 2026-05-27T09:40:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.b96360cfd53b214cae848fcf0ee2023253924a7b.002.1 |
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 |
| Headline | Special Marine Warning issued May 27 at 4:40AM 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 |
| Iem TypeSummary | M |
| Iem Magnitude | 41 |
| Iem Unit | MPH |
| Iem City | 12 SW Jamaica Beach |
| Iem County | GMZ335 |
| Iem State | TX |
| Iem Wfo | HGX |
| Iem Remark | Mesonet station LUIT2 11 SW Jamaica Beach. |
| MergedSources | [{"id":"iem_M_28.950_-95.380_1779869340000","source":"iem","severity":"low","severityValue":25,"timestamp":1779869340000,"latitude":28.95,"longitude":-95.38},{"id":"iem_M_29.420_-94.890_1779871200000","source":"iem","severity":"low","severityValue":25,"timestamp":1779871200000,"latitude":29.42,"longitude":-94.89},{"id":"iem_M_29.060_-95.140_1779870600000","source":"iem","severity":"low","severityValue":25,"timestamp":1779870600000,"latitude":29.06,"longitude":-95.14},{"id":"iem_M_28.940_-95.350_1779869520000","source":"iem","severity":"low","severityValue":25,"timestamp":1779869520000,"latitude":28.94,"longitude":-95.35},{"id":"iem_M_29.250_-94.850_1779871320000","source":"iem","severity":"low","severityValue":25,"timestamp":1779871320000,"latitude":29.25,"longitude":-94.85},{"id":"iem_M_29.180_-94.990_1779871200000","source":"iem","severity":"low","severityValue":25,"timestamp":1779871200000,"latitude":29.18,"longitude":-94.99},{"id":"iem_M_29.420_-94.890_1779870900000","source":"iem","severity":"low","severityValue":25,"timestamp":1779870900000,"latitude":29.42,"longitude":-94.89},{"id":"iem_M_28.940_-95.350_1779869100000","source":"iem","severity":"low","severityValue":25,"timestamp":1779869100000,"latitude":28.94,"longitude":-95.35},{"id":"iem_M_29.270_-94.870_1779871080000","source":"iem","severity":"low","severityValue":25,"timestamp":1779871080000,"latitude":29.27,"longitude":-94.87},{"id":"iem_M_29.300_-94.890_1779871260000","source":"iem","severity":"low","severityValue":25,"timestamp":1779871260000,"latitude":29.3,"longitude":-94.89},{"id":"iem_M_29.080_-95.120_1779869880000","source":"iem","severity":"low","severityValue":25,"timestamp":1779869880000,"latitude":29.08,"longitude":-95.12}] |
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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