This alert expired on 20 May 2026 at 05:00 UTC. It is kept here as a record.
No stronger detection stands among the 12 recorded within 20 km of this point since 20 May 2026 — 5 others scored the same. Another comparable one was recorded here earlier the same day. One more was recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued May 19 at 10:59PM CDT until May 20 at 12:00AM CDT by NWS Lake Charles LA
An estimated 222,915 people live within 50 km of this point.
Nearby, since 20 May 2026
- August 31, 2026 · score 37 · 13.6 km
- June 16, 2026 · score 39 · 20.7 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 | 29.6787, -93.9324 |
| Nearest City | Port Arthur (24 km) |
| Population Exposed | 222.9K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-20T03:59:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.be1e78e4903135596969317325538f0d |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Calcasieu Lake; Coastal waters from Cameron LA to High Island TX out 20 NM; Coastal waters from Intracoastal City to Cameron LA out 20 NM; Waters from Cameron LA to High Island TX from 20 to 60 NM; Waters from Intracoastal City to Cameron LA from 20 to 60 NM; Calcasieu Lake; Galveston Bay; Coastal waters from High Island to Freeport TX out 20 NM; Waters from High Island to Freeport TX from 20 to 60 NM |
| Headline | Special Marine Warning issued May 19 at 10:59PM CDT until May 20 at 12:00AM CDT by NWS Lake Charles LA |
| Expires | 2026-05-20T00:00:00-05:00 |
| SenderName | NWS Lake Charles LA |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.be1e78e4903135596969317325538f0d1fe78372.001.1","noaa_urn:oid:2.49.0.1.840.0.4ccfa177876738ef2a4359a84e4ca88014ca7a4b.001.1","noaa_urn:oid:2.49.0.1.840.0.d09086c4b6dd9b704fb4caf1ee980028b755cdce.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 Port Arthur (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.