Right now
The most recent data we hold from NOAA arrived 20 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 21 May 2026 at 21:30 UTC. It is kept here as a record.
It is the 33rd strongest of the 61 detections recorded within 20 km of this point since 30 April 2026. The last comparable one was on 12 May 2026. 13 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued May 21 at 3:09PM CDT until May 21 at 4:30PM CDT by NWS New Orleans LA
Nearby, since 30 April 2026
- May 12, 2026 · score 22 · 3.0 km
- May 10, 2026 · score 22 · 6.6 km
- September 4, 2026 · score 16 · 9.8 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 22 out of 100, at 61 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
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) | 22 / 100 |
| Our confidence | 61% |
| Coordinates | 30.7417, -89.6133 |
| Nearest City | Slidell (54 km) |
| Impact Tier | minor |
| Timestamp | 2026-05-21T20:09:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.f4461da3ea57230397b3850828f80d3134d41719.001.1 |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Pearl River, MS |
| Headline | Flash Flood Warning issued May 21 at 3:09PM CDT until May 21 at 4:30PM CDT by NWS New Orleans LA |
| Expires | 2026-05-21T16:30:00-05:00 |
| 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 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.
Want to know when something happens in this area?
Calamity.live data shows a weather event with CalamityScore 22/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.