Right now
The most recent data we hold from NOAA arrived 3 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 18 June 2026 at 18:30 UTC. It is kept here as a record.
It is the 30th strongest of the 39 detections recorded within 20 km of this point since 16 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 June 18 at 12:36PM CDT until June 18 at 1:30PM CDT by NWS New Orleans LA
Urban PEI: 60,248 within a heuristic 50 km radius; not unique people.
Nearby, since 16 March 2026
- July 22, 2026 · score 43 · 9.0 km
- June 24, 2026 · score 43 · 12.7 km
- June 15, 2026 · score 48 · 14.0 km
How we know
14 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 39 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 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) | 39 / 100 |
| Legacy data-support index | 0.89/1 |
| Coordinates | 30.0490, -89.4933 |
| Nearest City | Slidell (38 km) |
| Urban exposure index (PEI) | 60.2K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-18T17:36:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.7665bc5a6eb57cd4c91830bfe0ade58be40519f3.001.1 |
Physical priority index · v1. 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: 2026-06-18T17:36:00.000Z.
First archived: 2026-06-18T17:54:45.398Z. 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; Mississippi Sound; Lake Salvador and Lake Cataouatche; Lake Borgne; Chandeleur Sound |
| Headline | Special Marine Warning issued June 18 at 12:36PM CDT until June 18 at 1:30PM CDT by NWS New Orleans LA |
| Expires | 2026-06-18T13:30:00-05:00 |
| SenderName | NWS New Orleans LA |
| HasExactCoords | true |
| Spc ReportType | wind |
| Spc Speed | UNK |
| Spc Location | 4 ENE Slidell |
| Spc County | St. Tammany |
| Spc State | LA |
| Spc Comments | Significant flooding in Crossgates neighborhood in Slidell. Water encroaching on homes. (LIX) |
| Iem TypeSummary | F |
| Iem City | 2 WNW Slidell |
| Iem County | St. Tammany |
| Iem State | LA |
| Iem Wfo | LIX |
| Iem Remark | High water along Gause Boulevard in Slidell. |
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.
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