Right now
The most recent data we hold from NOAA arrived 7 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 22 May 2026 at 23:15 UTC. It is kept here as a record.
It is the 7th strongest of the 156 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. 16 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued May 22 at 4:46PM CDT until May 22 at 6:15PM CDT by NWS New Orleans LA
An estimated 866,520 people live within 50 km of this point.
Nearby, since 16 March 2026
- June 15, 2026 · score 48 · 3.2 km
- May 22, 2026 · score 48 · 3.5 km
- July 21, 2026 · score 48 · 6.9 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 48 out of 100, at 84 % 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 | 84% |
| Coordinates | 30.0610, -89.9152 |
| Nearest City | Chalmette (14 km) |
| Population Exposed | 866.5K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-22T21:46:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.2fb7300bb2f75d85ec3eca35542eeb63 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Lake Maurepas; Lake Pontchartrain; Mississippi Sound; Chandeleur Sound; Lake Salvador and Lake Cataouatche and 1 more areas |
| Headline | Special Marine Warning issued May 22 at 4:46PM CDT until May 22 at 6:15PM CDT by NWS New Orleans LA |
| Expires | 2026-05-22T18:15:00-05:00 |
| SenderName | NWS New Orleans LA |
| HasExactCoords | true |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.2fb7300bb2f75d85ec3eca35542eeb63f3ac487f.001.1","noaa_urn:oid:2.49.0.1.840.0.4c64ea51a8e819d8598c57aafe368f86852290e3.001.1","noaa_urn:oid:2.49.0.1.840.0.18f71148d7a31e4b4cc9443c292154d20c0f09d9.001.1","noaa_urn:oid:2.49.0.1.840.0.ef88c55baafa8c376dd32ae84926766852db406a.001.1"] |
| Iem TypeSummary | M |
| Iem Magnitude | 49 |
| Iem Unit | MPH |
| Iem City | 12 SSW Mandeville |
| Iem County | GMZ531 |
| Iem State | LA |
| Iem Wfo | LIX |
| Iem Remark | Mesonet station XPTN Pontchartrain Causeway measured a peak gust of 49 mph or 43 knots. |
| MergedSources | [{"id":"iem_M_30.200_-90.120_1779478860000","source":"iem","severity":"low","severityValue":25,"timestamp":1779478860000,"latitude":30.2,"longitude":-90.12}] |
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.
Want to know when something happens near Chalmette?