Right now
The most recent data we hold from NOAA arrived 2 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 28 May 2026 at 17:00 UTC. It is kept here as a record.
It is the 6th strongest of the 124 detections recorded within 20 km of this point since 12 March 2026. Another comparable one was recorded here earlier the same day. 23 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued May 28 at 11:02AM CDT until May 28 at 12:00PM CDT by NWS New Orleans LA
An estimated 896,392 people live within 50 km of this point.
Nearby, since 12 March 2026
- June 7, 2026 · score 48 · 2.1 km
- May 28, 2026 · score 48 · 6.3 km
- August 27, 2026 · score 48 · 6.8 km
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 48 out of 100, at 90 % 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) | 48 / 100 |
| Our confidence | 90% |
| Coordinates | 30.2164, -89.9900 |
| Nearest City | Slidell (21 km) |
| Population Exposed | 896.4K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-28T16:02:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.a387929b5e10b53a1900b3aafe80989f5ef8f5d8.001.1 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Lake Pontchartrain |
| Headline | Special Marine Warning issued May 28 at 11:02AM CDT until May 28 at 12:00PM CDT by NWS New Orleans LA |
| Expires | 2026-05-28T12:00:00-05:00 |
| SenderName | NWS New Orleans LA |
| HasExactCoords | true |
| Iem TypeSummary | W |
| Iem City | 7 SSW Eden Isle |
| Iem County | GMZ531 |
| Iem State | LA |
| Iem Wfo | LIX |
| Iem Remark | Broadcast media relayed picture of waterspout over Lake Pontchartrain near Irish Bayou. |
| MergedSources | [{"id":"iem_W_30.220_-89.880_1779971880000","source":"iem","severity":"low","severityValue":25,"timestamp":1779971880000,"latitude":30.22,"longitude":-89.88},{"id":"iem_W_30.150_-89.850_1779970200000","source":"iem","severity":"low","severityValue":25,"timestamp":1779970200000,"latitude":30.15,"longitude":-89.85}] |
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 48/100, near Slidell (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.