Right now
The most recent data we hold from NOAA arrived 7 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 12 May 2026 at 17:00 UTC. It is kept here as a record.
It is the 2nd strongest of the 153 detections recorded within 20 km of this point since 8 March 2026. Another comparable one was recorded here earlier the same day. 58 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flood Warning issued May 11 at 7:57PM CDT until May 14 at 9:24AM CDT by NWS New Orleans LA
Urban PEI: 20,480 within a heuristic 50 km radius; not unique people.
Nearby, since 8 March 2026
- May 13, 2026 · score 34 · 0.0 km
- May 12, 2026 · score 34 · 4.4 km
- May 22, 2026 · score 34 · 20.8 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 34 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) | 34 / 100 |
| Legacy data-support index | 0.80/1 |
| Coordinates | 30.6597, -90.1642 |
| Nearest City | Hammond (33 km) |
| Urban exposure index (PEI) | 20.5K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-13T15:00:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flood Warning_noaa_urn:oid:2.49.0.1.840.0.f60c4aad8c6bf205b3ff86287b2e78fe |
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: 2026-05-13T15:00:00.000Z.
First archived: 2026-05-12T00:59:15.914Z. 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 | Flood Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | St. Tammany, LA; St. Tammany, LA; Hancock, MS; Pearl River, MS; Washington, LA; Pearl River, MS and 8 more areas |
| Headline | Flood Warning issued May 11 at 7:57PM CDT until May 14 at 9:24AM CDT by NWS New Orleans LA |
| Expires | 2026-05-12T12:00:00-05:00 |
| SenderName | NWS New Orleans LA |
| HasExactCoords | true |
| MergedCount | 12 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.f60c4aad8c6bf205b3ff86287b2e78fe1d1ddea9.001.1","noaa_urn:oid:2.49.0.1.840.0.35eff551b4ede4df7c53a698128ea6b47325588a.001.1","noaa_urn:oid:2.49.0.1.840.0.35eff551b4ede4df7c53a698128ea6b47325588a.002.1","noaa_urn:oid:2.49.0.1.840.0.2290a4aa4ed07087bfbeb17ddc9bf58da75d471a.001.1","noaa_urn:oid:2.49.0.1.840.0.2290a4aa4ed07087bfbeb17ddc9bf58da75d471a.002.1","noaa_urn:oid:2.49.0.1.840.0.be1d12efd78f39cae5468a0f82e4334dd7c5ff26.002.1","noaa_urn:oid:2.49.0.1.840.0.be1d12efd78f39cae5468a0f82e4334dd7c5ff26.001.1","noaa_urn:oid:2.49.0.1.840.0.96c8c7e88436a9919b62c100e76b29ba78989f5e.001.1","noaa_urn:oid:2.49.0.1.840.0.a9d4f2afed9ecd6e1e9d61d071a5ea1588779e9e.001.1","noaa_urn:oid:2.49.0.1.840.0.83b3402d8f4f7ae015627577e883a55c21c4c3b1.001.1","noaa_urn:oid:2.49.0.1.840.0.aaacf583f2ea57e06f34496545731132ddfd0b20.001.1","noaa_urn:oid:2.49.0.1.840.0.be1d12efd78f39cae5468a0f82e4334dd7c5ff26.003.1"] |
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 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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