Right now
The most recent data we hold from NOAA arrived 4 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 27 May 2026 at 15:45 UTC. It is kept here as a record.
It is the 6th strongest of the 82 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. 8 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued May 27 at 11:07AM EDT until May 27 at 11:45AM EDT by NWS Pittsburgh PA
An estimated 34,885 people live within 50 km of this point.
Nearby, since 16 March 2026
- June 28, 2026 · score 34 · 9.0 km
- May 21, 2026 · score 34 · 16.7 km
- July 21, 2026 · score 63 · 17.9 km
How we know
Confirmed by 17 independent sources, including NOAA.
Our own score for this event is 34 out of 100, at 89 % 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 | 89% |
| Coordinates | 39.0871, -80.0295 |
| Nearest City | Clarksburg (34 km) |
| Population Exposed | 34.9K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-27T15:07:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.72f3ee04122567004de87cd52efd5223 |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Preston, WV; Tucker, WV; Barbour, WV; Braxton, WV; Calhoun, WV; Gilmer, WV; Harrison, WV; Lewis, WV; Randolph, WV; Roane, WV; Taylor, WV; Upshur, WV |
| Headline | Flash Flood Warning issued May 27 at 11:07AM EDT until May 27 at 11:45AM EDT by NWS Pittsburgh PA |
| Expires | 2026-05-27T11:45:00-04:00 |
| SenderName | NWS Pittsburgh PA |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.72f3ee04122567004de87cd52efd52230ef99bfe.001.1","noaa_urn:oid:2.49.0.1.840.0.466547fdbd4938c1de50086fa2a0b8ecf1c27cea.001.1"] |
| Iem TypeSummary | F |
| Iem City | 3 ESE Monongah |
| Iem County | Marion |
| Iem State | WV |
| Iem Wfo | PBZ |
| Iem Remark | Roadway flooding along Pleasant Valley Rd. Street is being marked off and closed. |
| MergedSources | [{"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_39.100_-80.470_1779891420000","source":"iem","severity":"low","severityValue":25,"timestamp":1779891420000,"latitude":39.1,"longitude":-80.47},{"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_39.480_-80.120_1779877140000","source":"iem","severity":"low","severityValue":25,"timestamp":1779877140000,"latitude":39.48,"longitude":-80.12},{"id":"iem_F_39.090_-79.730_1779891660000","source":"iem","severity":"low","severityValue":25,"timestamp":1779891660000,"latitude":39.09,"longitude":-79.73},{"id":"iem_E_39.470_-80.090_1779876720000","source":"iem","severity":"low","severityValue":25,"timestamp":1779876720000,"latitude":39.47,"longitude":-80.09},{"id":"iem_F_39.380_-80.280_1779881880000","source":"iem","severity":"low","severityValue":25,"timestamp":1779881880000,"latitude":39.38,"longitude":-80.28},{"id":"iem_F_39.070_-79.960_1779888180000","source":"iem","severity":"low","severityValue":25,"timestamp":1779888180000,"latitude":39.07,"longitude":-79.96},{"id":"iem_F_39.030_-80.780_1779892440000","source":"iem","severity":"low","severityValue":25,"timestamp":1779892440000,"latitude":39.03,"longitude":-80.78},{"id":"iem_F_38.950_-80.830_1779886680000","source":"iem","severity":"low","severityValue":25,"timestamp":1779886680000,"latitude":38.95,"longitude":-80.83},{"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_39.150_-80.050_1779892380000","source":"iem","severity":"low","severityValue":25,"timestamp":1779892380000,"latitude":39.15,"longitude":-80.05},{"id":"iem_F_39.090_-80.100_1779892440000","source":"iem","severity":"low","severityValue":25,"timestamp":1779892440000,"latitude":39.09,"longitude":-80.1},{"id":"iem_F_39.470_-80.090_1779876720000","source":"iem","severity":"low","severityValue":25,"timestamp":1779876720000,"latitude":39.47,"longitude":-80.09},{"id":"iem_F_39.440_-80.170_1779875340000","source":"iem","severity":"low","severityValue":25,"timestamp":1779875340000,"latitude":39.44,"longitude":-80.17}] |
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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