This alert expired on 12 March 2026 at 06:00 UTC. It is kept here as a record.
It is the 4th strongest of the 47 detections recorded within 20 km of this point since 8 March 2026. The last comparable one was on 9 March 2026. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flood Warning issued March 11 at 8:41AM CDT until March 12 at 5:30AM CDT by NWS New Orleans LA
An estimated 50,352 people live within 50 km of this point.
Nearby, since 8 March 2026
- March 9, 2026 · score 22 · 0.0 km
- March 8, 2026 · score 22 · 0.0 km
- May 22, 2026 · score 34 · 8.2 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 39 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 | medium |
| Calamity Score (ours) | 39 / 100 |
| Our confidence | 79% |
| Coordinates | 30.4800, -90.3460 |
| Nearest City | Hammond (11 km) |
| Population Exposed | 50.4K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-03-11T13:41:00.000Z |
| Source | https://api.weather.gov/alerts/urn-oid-2_49_0_1_840_0_a389bde5b4addd77f99ecc5755faabed87911ad2_001_1 |
Score Breakdown
Technical Details
| Event | Flood Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Tangipahoa, LA |
| Headline | Flood Warning issued March 11 at 8:41AM CDT until March 12 at 5:30AM CDT by NWS New Orleans LA |
| Expires | 2026-03-12T01:00:00-05:00 |
| SenderName | NWS New Orleans LA |
| HasExactCoords | true |
Safety Information
During flooding: never walk, swim, or drive through floodwaters. Six inches of moving water can knock you down, and one foot of water can sweep away a vehicle. Move to higher ground if waters rise. After flooding, avoid contact with floodwater which may contain sewage, chemicals, or debris. Follow local emergency service guidance.
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.
Want to know when something happens near Hammond?
Calamity.live data shows a weather event with CalamityScore 39/100, near Hammond (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.