This alert expired on 12 March 2026 at 02:30 UTC. It is kept here as a record.
It is the strongest of the 181 detections recorded within 20 km of this point since 12 March 2026.
What the source measured
NOAA reported: Tornado Warning issued March 11 at 9:20PM CDT until March 11 at 9:30PM CDT by NWS New Orleans LA
Nearby, since 12 March 2026
- June 22, 2026 · score 22 · 3.3 km
- July 5, 2026 · score 22 · 7.3 km
- June 21, 2026 · score 22 · 9.4 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 46 out of 100, at 65 % 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) | 46 / 100 |
| Our confidence | 65% |
| Coordinates | 30.8177, -89.9384 |
| Nearest City | Hammond (61 km) |
| Impact Tier | minor |
| Timestamp | 2026-03-12T02:20:00.000Z |
Score Breakdown
Technical Details
| Event | Tornado Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Tangipahoa, LA; Washington, LA; St. Tammany, LA and 2 more areas |
| Headline | Tornado Warning issued March 11 at 9:20PM CDT until March 11 at 9:30PM CDT by NWS New Orleans LA |
| Expires | 2026-03-11T21:30:00-05:00 |
| SenderName | NWS New Orleans LA |
| HasExactCoords | true |
| MergedCount | 6 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.856f0e129b55403d437a29f607ca24d6bb921c5a.001.1","noaa_urn:oid:2.49.0.1.840.0.13ca367986c2504cdce48e196a16eed6ad191e95.001.1","noaa_urn:oid:2.49.0.1.840.0.514966e09f15ef70ecff2e8de6c7c62691346c97.001.1","noaa_urn:oid:2.49.0.1.840.0.f2e24bbde7fa1c29223399c75fd6d23ad0d700b7.001.1","noaa_urn:oid:2.49.0.1.840.0.f110301c56a23eaa55bb7fab1659f903ba4c57c5.001.1","noaa_urn:oid:2.49.0.1.840.0.5408be6f2395c4476fc9f84ce39d031530d0c9cd.001.1"] |
| Iem TypeSummary | D |
| Iem City | 2 NE Roseland |
| Iem County | Tangipahoa |
| Iem State | LA |
| Iem Wfo | LIX |
| Iem Remark | Trees reported down on LA 10 and South River Rd near Roseland, LA. Possible Tornado. |
| MergedSources | [{"id":"iem_D_30.790_-90.480_1773279660000","source":"iem","severity":"low","severityValue":25,"timestamp":1773279660000,"latitude":30.79,"longitude":-90.48}] |
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 46/100, near Hammond (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.