This alert expired on 20 June 2026 at 23:30 UTC. It is kept here as a record.
It is the 32nd strongest of the 55 detections recorded within 20 km of this point since 18 June 2026. The last comparable one was on 18 June 2026. 48 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued June 20 at 3:28PM CDT until June 20 at 6:30PM CDT by NWS New Orleans LA
An estimated 83,514 people live within 50 km of this point.
Nearby, since 18 June 2026
- July 23, 2026 · score 39 · 12.9 km
- June 18, 2026 · score 72 · 16.8 km
- June 18, 2026 · score 72 · 21.5 km
How we know
Confirmed by 4 independent sources, including NOAA.
Our own score for this event is 39 out of 100, at 89 % 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 | 89% |
| Coordinates | 29.6608, -90.6100 |
| Nearest City | Houma (13 km) |
| Population Exposed | 83.5K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-20T20:28:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.790e176ff1741be18a01a11b61064afc76df72a6.001.1 |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Lafourche, LA; Terrebonne, LA |
| Headline | Flash Flood Warning issued June 20 at 3:28PM CDT until June 20 at 6:30PM CDT by NWS New Orleans LA |
| Expires | 2026-06-20T18:30:00-05:00 |
| SenderName | NWS New Orleans LA |
| HasExactCoords | true |
| 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 39/100, near Houma (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.