This alert expired on 18 June 2026 at 09:30 UTC. It is kept here as a record.
No stronger detection stands among the 54 recorded within 20 km of this point since 25 April 2026 — 23 others scored the same. 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: Tornado Warning issued June 18 at 4:00AM CDT until June 18 at 4:30AM CDT by NWS New Orleans LA
An estimated 905,341 people live within 50 km of this point.
Nearby, since 25 April 2026
- June 20, 2026 · score 48 · 4.9 km
- June 18, 2026 · score 72 · 6.5 km
- June 18, 2026 · score 72 · 11.4 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 72 out of 100, at 79 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | critical |
| Calamity Score (ours) | 72 / 100 |
| Our confidence | 79% |
| Coordinates | 29.8156, -90.4772 |
| Nearest City | Laplace (28 km) |
| Population Exposed | 905.3K within 50 km |
| Impact Tier | catastrophic |
| Timestamp | 2026-06-18T09:00:00.000Z |
Score Breakdown
Technical Details
| Event | Tornado Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | St. Charles, LA; Lafourche, LA; Terrebonne, LA; Lafourche, LA; St. Charles, LA |
| Headline | Tornado Warning issued June 18 at 4:00AM CDT until June 18 at 4:30AM CDT by NWS New Orleans LA |
| Expires | 2026-06-18T04:30:00-05:00 |
| SenderName | NWS New Orleans LA |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.43d1a7a8bd28ef9bb14fb1e09079c6f429d8f137.001.1","noaa_urn:oid:2.49.0.1.840.0.1d4078615a4db0216760f306c3d895455de6659a.001.1","noaa_urn:oid:2.49.0.1.840.0.cb55d14fb20c5627b4a5ee8d831eba51e516544a.001.1"] |
Safety Information
If a tornado warning is issued: go to a basement or an interior room on the lowest floor, away from windows. A vehicle and a mobile home are not shelter. Cover your head and neck. Wait for the official all-clear before going outside, and watch for downed power lines and gas leaks afterwards.
Series begins 10 February 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.
Calamity.live data shows a weather event with CalamityScore 72/100, near Laplace (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.