Right now
The most recent data we hold from NOAA arrived 51 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 9 May 2026 at 10:00 UTC. It is kept here as a record.
It is the 32nd strongest of the 77 detections recorded within 20 km of this point since 16 March 2026. The last comparable one was on 16 March 2026.
What the source measured
NOAA reported: Special Marine Warning issued May 9 at 3:58AM CDT until May 9 at 5:00AM CDT by NWS New Orleans LA
An estimated 101,447 people live within 50 km of this point.
Nearby, since 16 March 2026
- July 21, 2026 · score 37 · 6.1 km
- June 15, 2026 · score 48 · 11.7 km
- March 16, 2026 · score 48 · 14.0 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 81 % 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) | 43 / 100 |
| Our confidence | 81% |
| Coordinates | 30.1248, -89.5981 |
| Nearest City | Slidell (25 km) |
| Population Exposed | 101.4K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-09T08:58:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.3b502308f33339d3afda5e30e7e43063bcbd12eb.001.1 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Lake Pontchartrain; Mississippi Sound; Lake Borgne; Chandeleur Sound |
| Headline | Special Marine Warning issued May 9 at 3:58AM CDT until May 9 at 5:00AM CDT by NWS New Orleans LA |
| Expires | 2026-05-09T05:00:00-05:00 |
| SenderName | NWS New Orleans LA |
| HasExactCoords | true |
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 near Slidell?
Calamity.live data shows a weather event with CalamityScore 43/100, near Slidell (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.