This alert expired on 27 May 2026 at 13:45 UTC. It is kept here as a record.
It is the 9th strongest of the 81 detections recorded within 20 km of this point since 7 May 2026. Another comparable one was recorded here earlier the same day. 9 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flood Warning issued May 26 at 7:55PM CDT until May 27 at 8:45AM CDT by NWS New Orleans LA
An estimated 46,805 people live within 50 km of this point.
Nearby, since 7 May 2026
- June 28, 2026 · score 34 · 7.5 km
- May 26, 2026 · score 34 · 11.1 km
- June 18, 2026 · score 58 · 11.5 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 34 out of 100, at 86 % 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) | 34 / 100 |
| Our confidence | 86% |
| Coordinates | 31.0568, -89.1535 |
| Nearest City | Hattiesburg (33 km) |
| Population Exposed | 46.8K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-27T00:55:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flood Warning_noaa_urn:oid:2.49.0.1.840.0.436896077c1097225abf4590a93469b9 |
Score Breakdown
Technical Details
| Event | Flood Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Hancock, MS; Harrison, MS; St. Tammany, LA; Hancock, MS; Pearl River, MS and 6 more areas |
| Headline | Flood Warning issued May 26 at 7:55PM CDT until May 27 at 8:45AM CDT by NWS New Orleans LA |
| Expires | 2026-05-27T08:45:00-05:00 |
| SenderName | NWS New Orleans LA |
| HasExactCoords | true |
| MergedCount | 11 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.436896077c1097225abf4590a93469b940b39c93.001.1","noaa_urn:oid:2.49.0.1.840.0.21ce1a5665a4e5651b9028f3c09406f33f9a5a05.001.1","noaa_urn:oid:2.49.0.1.840.0.d1f844d4a54db608f9deddac85a2f8cbbf1ff5d4.001.1","noaa_urn:oid:2.49.0.1.840.0.a5250f7781fcbe40a1e0596b3e27d39c84046d64.001.1","noaa_urn:oid:2.49.0.1.840.0.b9eb7568986f40f857ff01e8b7dc35b66ffba24c.001.1","noaa_urn:oid:2.49.0.1.840.0.d833fdfc961a815045f4d73f5e3e0490b3e59d47.001.1","noaa_urn:oid:2.49.0.1.840.0.a786189bb6b325439e1f6467ac8b0f55e5e7833a.001.1","noaa_urn:oid:2.49.0.1.840.0.364694dd0abe1b786202a51c4fb2b63ddad80858.002.1","noaa_urn:oid:2.49.0.1.840.0.364694dd0abe1b786202a51c4fb2b63ddad80858.001.1","noaa_urn:oid:2.49.0.1.840.0.4bc805ef7a1f785201592cf8d3bf62f4b79e8a77.001.1","noaa_urn:oid:2.49.0.1.840.0.cc5883c35f450e3c255aa3a5b722f87774e7e646.001.1"] |
| Iem TypeSummary | H |
| Iem Magnitude | 0.75 |
| Iem Unit | Inch |
| Iem City | 3 SSE Calhoun |
| Iem County | Jones |
| Iem State | MS |
| Iem Wfo | JAN |
| Iem Remark | Dime to penny sized hail. |
| MergedSources | [{"id":"iem_H_31.660_-89.190_1779823920000","source":"iem","severity":"low","severityValue":25,"timestamp":1779823920000,"latitude":31.66,"longitude":-89.19}] |
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 34/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.