Right now
The most recent data we hold from NOAA arrived 3 minutes ago, and this point is in it.
4 other detections within 20 km in the last 24 hours, the nearest 4 km from here.
This alert expired on 22 September 2026 at 00:30 UTC. It is kept here as a record.
It is the 83rd strongest of the 187 detections recorded within 20 km of this point since 12 March 2026. Another comparable one was recorded here earlier the same day. 7 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued September 21 at 6:58PM CDT until September 21 at 7:30PM CDT by NWS New Orleans LA
Urban PEI: 896,392 within a heuristic 50 km radius; not unique people.
Nearby, since 12 March 2026
- July 7, 2026 · score 41 · 3.5 km
- September 22, 2026 · score 41 · 4.1 km
- June 19, 2026 · score 48 · 4.7 km
How we know
2 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 41 out of 100.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
Computed under scoring rules v5. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 41 / 100 |
| Legacy data-support index | 0.85/1 |
| Coordinates | 30.0850, -90.1807 |
| Nearest City | Metairie Terrace (12 km) |
| Urban exposure index (PEI) | 896.4K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-21T23:58:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.62703a0fef2c5cb489656defd927b4d35ae98531.001.1 |
Physical priority index · v5. Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: noaa. Occurrence: 2026-09-21T23:58:00.000Z.
First archived: 2026-09-22T00:03:20.454Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Lake Pontchartrain |
| Headline | Special Marine Warning issued September 21 at 6:58PM CDT until September 21 at 7:30PM CDT by NWS New Orleans LA |
| Expires | 2026-09-21T19:30:00-05:00 |
| SenderName | NWS New Orleans LA |
| HasExactCoords | true |
| Spc ReportType | wind |
| Spc Speed | UNK |
| Spc Location | 2 N Madisonville |
| Spc County | St. Tammany |
| Spc State | LA |
| Spc Comments | Trees down. (LIX) |
| MergedSources | [{"id":"spc_wind_30.43_-90.16_63","source":"spc","severity":"medium","severityValue":45,"timestamp":1790033220000,"latitude":30.43,"longitude":-90.16}] |
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.
Review the area, threshold and delivery channel in your account.
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