Right now
The most recent data we hold from NOAA arrived 7 minutes ago, and this point is in it.
5 other detections within 20 km in the last 24 hours, the nearest 5 km from here.
This alert is in force until 10 September 2026, 04:00 UTC.
It is the 18th strongest of the 51 detections recorded within 20 km of this point since 15 March 2026. The last comparable one was on 9 September 2026. 14 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued September 9 at 8:54PM EDT until September 10 at 12:00AM EDT by NWS Pittsburgh PA
An estimated 186,160 people live within 50 km of this point.
Nearby, since 15 March 2026
- June 25, 2026 · score 43 · 10.3 km
- June 25, 2026 · score 67 · 16.7 km
- September 4, 2026 · score 37 · 18.7 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 37 out of 100, at 86 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v4. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 37 / 100 |
| Our confidence | 86% |
| Coordinates | 40.6320, -80.8850 |
| Nearest City | Weirton (34 km) |
| Population Exposed | 186.2K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-10T00:54:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.a9398379bed26341ec3301d17feb5829c85a9430.001.1 |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Carroll, OH; Columbiana, OH; Jefferson, OH; Hancock, WV |
| Headline | Flash Flood Warning issued September 9 at 8:54PM EDT until September 10 at 12:00AM EDT by NWS Pittsburgh PA |
| Expires | 2026-09-10T00:00:00-04:00 |
| SenderName | NWS Pittsburgh PA |
| HasExactCoords | true |
| Spc ReportType | wind |
| Spc Speed | UNK |
| Spc Location | 1 ESE Chester |
| Spc County | Hancock |
| Spc State | WV |
| Spc Comments | Report of a power line down. Time estimated based on radar. (PBZ) |
| MergedSources | [{"id":"spc_wind_40.95_-81.33_8","source":"spc","severity":"medium","severityValue":45,"timestamp":1789005833351,"latitude":40.95,"longitude":-81.33},{"id":"spc_wind_40.96_-81.34_9","source":"spc","severity":"medium","severityValue":45,"timestamp":1789005833351,"latitude":40.96,"longitude":-81.34},{"id":"spc_wind_40.92_-81.11_10","source":"spc","severity":"medium","severityValue":45,"timestamp":1789005833351,"latitude":40.92,"longitude":-81.11},{"id":"spc_wind_40.92_-81.09_11","source":"spc","severity":"medium","severityValue":45,"timestamp":1789005833351,"latitude":40.92,"longitude":-81.09},{"id":"spc_wind_40.61_-80.56_24","source":"spc","severity":"medium","severityValue":45,"timestamp":1789005833351,"latitude":40.61,"longitude":-80.56},{"id":"spc_wind_40.61_-80.55_25","source":"spc","severity":"medium","severityValue":45,"timestamp":1789005833351,"latitude":40.61,"longitude":-80.55}] |
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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