This alert expired on 20 June 2026 at 23:00 UTC. It is kept here as a record.
It is the 30th strongest of the 59 detections recorded within 20 km of this point since 25 April 2026. Another comparable one was recorded here earlier the same day. 43 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued June 20 at 3:31PM CDT until June 20 at 6:00PM CDT by NWS New Orleans LA
An estimated 922,092 people live within 50 km of this point.
Nearby, since 25 April 2026
- June 18, 2026 · score 72 · 4.9 km
- June 18, 2026 · score 72 · 5.4 km
- June 18, 2026 · score 72 · 6.7 km
How we know
Confirmed by 4 independent sources, including NOAA.
Our own score for this event is 48 out of 100, at 88 % 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) | 48 / 100 |
| Our confidence | 88% |
| Coordinates | 29.7909, -90.4357 |
| Nearest City | Kenner (29 km) |
| Population Exposed | 922.1K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-20T20:31:00.000Z |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Jefferson, LA; St. Charles, LA; Lafourche, LA; Terrebonne, LA |
| Headline | Flash Flood Warning issued June 20 at 3:31PM CDT until June 20 at 6:00PM CDT by NWS New Orleans LA |
| Expires | 2026-06-20T18:00:00-05:00 |
| SenderName | NWS New Orleans LA |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.8ee6b7869802c5d2a6ff3e29f6f01bf45149c522.001.1","noaa_urn:oid:2.49.0.1.840.0.790e176ff1741be18a01a11b61064afc76df72a6.001.1"] |
| Iem TypeSummary | M |
| Iem Magnitude | 44 |
| Iem Unit | MPH |
| Iem City | 13 SSW Mandeville |
| Iem County | GMZ531 |
| Iem State | LA |
| Iem Wfo | LIX |
| Iem Remark | Mesonet site at Mid-Lake measured wind gust at 44mph. |
| MergedSources | [{"id":"iem_F_30.000_-90.260_1781987220000","source":"iem","severity":"low","severityValue":25,"timestamp":1781987220000,"latitude":30,"longitude":-90.26},{"id":"iem_F_29.970_-90.380_1781987400000","source":"iem","severity":"low","severityValue":25,"timestamp":1781987400000,"latitude":29.97,"longitude":-90.38},{"id":"iem_M_30.190_-90.130_1781985060000","source":"iem","severity":"low","severityValue":25,"timestamp":1781985060000,"latitude":30.19,"longitude":-90.13}] |
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.
Calamity.live data shows a weather event with CalamityScore 48/100, near Kenner (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.