This alert expired on 28 May 2026 at 19:30 UTC. It is kept here as a record.
It is the 10th strongest of the 95 detections recorded within 20 km of this point since 12 March 2026. Another comparable one was recorded here earlier the same day. 45 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued May 28 at 11:36AM CDT until May 28 at 2:30PM CDT by NWS New Orleans LA
An estimated 186,682 people live within 50 km of this point.
Nearby, since 12 March 2026
- June 18, 2026 · score 67 · 3.6 km
- May 25, 2026 · score 43 · 8.5 km
- May 26, 2026 · score 43 · 8.6 km
How we know
Confirmed by 4 independent sources, including NOAA.
Our own score for this event is 43 out of 100, at 91 % 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) | 43 / 100 |
| Our confidence | 91% |
| Coordinates | 30.5766, -89.5039 |
| Nearest City | Long Beach (42 km) |
| Population Exposed | 186.7K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-28T16:36:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.93676d91a00e9937c6131ab2bed8232b |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Hancock, MS; Pearl River, MS; Orleans, LA; St. Bernard, LA; Stone, MS and 1 more areas |
| Headline | Flash Flood Warning issued May 28 at 11:36AM CDT until May 28 at 2:30PM CDT by NWS New Orleans LA |
| Expires | 2026-05-28T14:30:00-05:00 |
| SenderName | NWS New Orleans LA |
| HasExactCoords | true |
| MergedCount | 5 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.93676d91a00e9937c6131ab2bed8232b875b7242.001.1","noaa_urn:oid:2.49.0.1.840.0.6e0899f607e06ff956d6fa0545cdc1d302fb3a3a.001.1","noaa_urn:oid:2.49.0.1.840.0.bc11ace9a574b8479fc269fa0970dbcb460ade89.001.1","noaa_urn:oid:2.49.0.1.840.0.d0a424f4eb85273fe13914a8493a2b8f6d4f3de1.001.1","noaa_urn:oid:2.49.0.1.840.0.fc4cdd7541b514e117e33bb8102b9548a6fc4bdc.001.1"] |
| Iem TypeSummary | F |
| Iem City | Perkinston |
| Iem County | Stone |
| Iem State | MS |
| Iem Wfo | MOB |
| Iem Remark | Emergency managment reports multiple roads and streets flooding across Stone county. EM reports slightly more than 3 inches of rainfall in Wiggins MS at time of the report with rain continuing. |
| MergedSources | [{"id":"iem_W_30.220_-89.880_1779971880000","source":"iem","severity":"low","severityValue":25,"timestamp":1779971880000,"latitude":30.22,"longitude":-89.88},{"id":"iem_W_30.150_-89.850_1779970200000","source":"iem","severity":"low","severityValue":25,"timestamp":1779970200000,"latitude":30.15,"longitude":-89.85},{"id":"iem_F_30.780_-89.140_1779986940000","source":"iem","severity":"low","severityValue":25,"timestamp":1779986940000,"latitude":30.78,"longitude":-89.14}] |
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 43/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.