Right now
The most recent data we hold from NOAA arrived 3 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 18 June 2026 at 19:30 UTC. It is kept here as a record.
It is the 8th strongest of the 66 detections recorded within 20 km of this point since 26 April 2026. Another comparable one was recorded here earlier the same day. 5 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued June 18 at 11:31AM CDT until June 18 at 2:30PM CDT by NWS New Orleans LA
Urban PEI: 46,805 within a heuristic 50 km radius; not unique people.
Nearby, since 26 April 2026
- May 26, 2026 · score 34 · 5.3 km
- May 25, 2026 · score 34 · 7.1 km
- May 8, 2026 · score 34 · 15.6 km
How we know
6 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 34 out of 100.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
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 |
| Legacy data-support index | 0.90/1 |
| Coordinates | 31.0316, -89.3174 |
| Nearest City | Hattiesburg (33 km) |
| Urban exposure index (PEI) | 46.8K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-18T16:31:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.bf156dfb02f426c9a586c9e8428873d3 |
Physical priority index · v1. Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: noaa. Occurrence: 2026-06-18T16:31:00.000Z.
First archived: 2026-06-18T17:12:24.814Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | St. Tammany, LA; Hancock, MS; Harrison, MS; Pearl River, MS; Stone, MS; Perry, MS and 4 more areas |
| Headline | Flash Flood Warning issued June 18 at 11:31AM CDT until June 18 at 2:30PM CDT by NWS New Orleans LA |
| Expires | 2026-06-18T14:30:00-05:00 |
| SenderName | NWS New Orleans LA |
| HasExactCoords | true |
| MergedCount | 7 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.bf156dfb02f426c9a586c9e8428873d315085c80.001.1","noaa_urn:oid:2.49.0.1.840.0.697202a08d3b6f791452fe328583d6a5021d3754.001.1","noaa_urn:oid:2.49.0.1.840.0.fc24dd06712f332b2129b5d1c9a776bc5a4f12b1.001.1","noaa_urn:oid:2.49.0.1.840.0.fe69fa63080d273ea7de3974c41b70344618ba39.001.1","noaa_urn:oid:2.49.0.1.840.0.b800a122ac2363332472cdab2d0a071a0364b26b.001.1","noaa_urn:oid:2.49.0.1.840.0.51acebdc35be1df5484ff69cf937542a91b03555.001.1","noaa_urn:oid:2.49.0.1.840.0.95ac15ef1077b03b2ec1942326829330af8a20e6.001.1"] |
| Iem TypeSummary | F |
| Iem City | Wiggins |
| Iem County | Stone |
| Iem State | MS |
| Iem Wfo | MOB |
| Iem Remark | Multiple streets and roads impassable across Stone County. Videos showing rising floodwaters in Wiggins. |
| MergedSources | [{"id":"iem_F_30.840_-89.540_1781796960000","source":"iem","severity":"low","severityValue":25,"timestamp":1781796960000,"latitude":30.84,"longitude":-89.54},{"id":"iem_F_30.670_-89.400_1781793600000","source":"iem","severity":"low","severityValue":25,"timestamp":1781793600000,"latitude":30.67,"longitude":-89.4},{"id":"iem_F_30.900_-89.110_1781798220000","source":"iem","severity":"low","severityValue":25,"timestamp":1781798220000,"latitude":30.9,"longitude":-89.11},{"id":"iem_F_31.190_-89.260_1781800140000","source":"iem","severity":"low","severityValue":25,"timestamp":1781800140000,"latitude":31.19,"longitude":-89.26},{"id":"iem_F_30.860_-89.140_1781789820000","source":"iem","severity":"low","severityValue":25,"timestamp":1781789820000,"latitude":30.86,"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 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.
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