This alert expired on 23 May 2026 at 18:15 UTC. It is kept here as a record.
It is the 3rd strongest of the 34 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. 8 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued May 23 at 12:15PM CDT until May 23 at 1:15PM CDT by NWS Houston/Galveston TX
An estimated 648,561 people live within 50 km of this point.
Nearby, since 16 March 2026
- August 28, 2026 · score 48 · 0.8 km
- July 22, 2026 · score 48 · 3.4 km
- July 6, 2026 · score 43 · 8.3 km
How we know
Confirmed by 4 independent sources, including NOAA.
Our own score for this event is 48 out of 100, at 89 % 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) | 48 / 100 |
| Our confidence | 89% |
| Coordinates | 29.6195, -94.7438 |
| Nearest City | Baytown (26 km) |
| Population Exposed | 648.6K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-23T17:15:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.8fd86ff941d3d9a271d5f870ecf163c72a376759.001.1 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Galveston Bay; Coastal waters from High Island to Freeport TX out 20 NM |
| Headline | Special Marine Warning issued May 23 at 12:15PM CDT until May 23 at 1:15PM CDT by NWS Houston/Galveston TX |
| Expires | 2026-05-23T13:15:00-05:00 |
| SenderName | NWS Houston/Galveston TX |
| HasExactCoords | true |
| Iem TypeSummary | M |
| Iem Magnitude | 58 |
| Iem Unit | MPH |
| Iem City | 1 S Highlands |
| Iem County | GMZ335 |
| Iem State | TX |
| Iem Wfo | HGX |
| Iem Remark | Mesonet station HLNT2 G103 San Jacinto River At I-10 E. |
| Google News RssFeed | weather |
| Google News SourceName | Click2Houston |
| MergedSources | [{"id":"iem_M_29.540_-94.910_1779536640000","source":"iem","severity":"low","severityValue":25,"timestamp":1779536640000,"latitude":29.54,"longitude":-94.91},{"id":"iem_M_29.790_-95.060_1779535620000","source":"iem","severity":"low","severityValue":25,"timestamp":1779535620000,"latitude":29.79,"longitude":-95.06},{"id":"gnews_weather_494315_141","source":"google_news","severity":"medium","severityValue":40,"timestamp":1779536889000,"latitude":29.76,"longitude":-95.36}] |
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 48/100, near Baytown (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.