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.
10 other detections within 20 km in the last 24 hours, the nearest 16 km from here.
This alert expired on 27 May 2026 at 13:00 UTC. It is kept here as a record.
It is the 4th strongest of the 105 detections recorded within 20 km of this point since 17 March 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 May 27 at 7:30AM EDT until May 27 at 9:00AM EDT by NWS Charleston WV
An estimated 16,152 people live within 50 km of this point.
Nearby, since 17 March 2026
- May 25, 2026 · score 34 · 9.0 km
- September 11, 2026 · score 28 · 16.3 km
- September 2, 2026 · score 16 · 19.3 km
How we know
Confirmed by 5 independent sources, including NOAA.
Our own score for this event is 34 out of 100, at 90 % 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 | 90% |
| Coordinates | 39.1006, -80.7474 |
| Nearest City | Clarksburg (40 km) |
| Population Exposed | 16.2K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-27T11:30:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.ba65c3372be8dde661017300ae008003 |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Harrison, WV; Taylor, WV; Jackson, WV; Roane, WV |
| Headline | Flash Flood Warning issued May 27 at 7:30AM EDT until May 27 at 9:00AM EDT by NWS Charleston WV |
| Expires | 2026-05-27T09:00:00-04:00 |
| SenderName | NWS Charleston WV |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.ba65c3372be8dde661017300ae008003ae2b5ace.001.1","noaa_urn:oid:2.49.0.1.840.0.919e5b25412f776a9a49bd95f810d5a72ce59b84.001.1"] |
| 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_39.440_-80.170_1779875340000","source":"iem","severity":"low","severityValue":25,"timestamp":1779875340000,"latitude":39.44,"longitude":-80.17},{"id":"iem_x_39.430_-80.150_1779878100000","source":"iem","severity":"low","severityValue":25,"timestamp":1779878100000,"latitude":39.43,"longitude":-80.15},{"id":"iem_F_39.450_-80.130_1779878160000","source":"iem","severity":"low","severityValue":25,"timestamp":1779878160000,"latitude":39.45,"longitude":-80.13},{"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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