Right now
The most recent data we hold from NOAA arrived 6 hours ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
3 other detections within 20 km in the last 24 hours, the nearest 14 km from here.
This alert expired on 27 May 2026 at 17:15 UTC. It is kept here as a record.
It is the 4th strongest of the 107 detections recorded within 20 km of this point since 13 March 2026. The last comparable one was on 25 May 2026. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued May 27 at 10:12AM EDT until May 27 at 1:15PM EDT by NWS Wilmington OH
Urban PEI: 30,991 within a heuristic 50 km radius; not unique people.
Nearby, since 13 March 2026
- July 12, 2026 · score 34 · 5.4 km
- June 28, 2026 · score 34 · 25.7 km
How we know
5 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 | 39.2249, -81.0881 |
| Nearest City | Parkersburg (41 km) |
| Urban exposure index (PEI) | 31.0K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-27T14:12:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.1567e1f159c66b3d9aabdf3b5803c69d |
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: 2026-05-27T14:12:00.000Z.
First archived: 2026-05-27T14:19:00.063Z. 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 | Fairfield, OH; Franklin, OH; Licking, OH; Jackson, WV; Roane, WV; Preston, WV; Tucker, WV and 1 more areas |
| Headline | Flash Flood Warning issued May 27 at 10:12AM EDT until May 27 at 1:15PM EDT by NWS Wilmington OH |
| Expires | 2026-05-27T13:15:00-04:00 |
| SenderName | NWS Wilmington OH |
| HasExactCoords | true |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.1567e1f159c66b3d9aabdf3b5803c69ddb1c516b.001.1","noaa_urn:oid:2.49.0.1.840.0.919e5b25412f776a9a49bd95f810d5a72ce59b84.001.1","noaa_urn:oid:2.49.0.1.840.0.a325302d1c97febb4141dfa725aebecf762c1cb3.001.1","noaa_urn:oid:2.49.0.1.840.0.5a519af12401f990f225f6304abf43fecfd10323.001.1"] |
| Iem TypeSummary | F |
| Iem City | 1 SE Shinnston |
| Iem County | Harrison |
| Iem State | WV |
| Iem Wfo | RLX |
| Iem Remark | Road is completely covered with water. There are also a couple mud/land slides. |
| MergedSources | [{"id":"iem_F_38.950_-80.830_1779886680000","source":"iem","severity":"low","severityValue":25,"timestamp":1779886680000,"latitude":38.95,"longitude":-80.83},{"id":"iem_F_39.040_-80.650_1779885960000","source":"iem","severity":"low","severityValue":25,"timestamp":1779885960000,"latitude":39.04,"longitude":-80.65},{"id":"iem_F_39.080_-80.470_1779884820000","source":"iem","severity":"low","severityValue":25,"timestamp":1779884820000,"latitude":39.08,"longitude":-80.47},{"id":"iem_F_39.380_-80.280_1779881880000","source":"iem","severity":"low","severityValue":25,"timestamp":1779881880000,"latitude":39.38,"longitude":-80.28}] |
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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