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.
2 other detections within 20 km in the last 24 hours, the nearest 10 km from here.
This alert is in force until 10 September 2026, 08:00 UTC.
It is the 33rd strongest of the 68 detections recorded within 20 km of this point since 12 March 2026. Another comparable one was recorded here earlier the same day. One more was recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued September 10 at 12:06AM EDT until September 10 at 4:00AM EDT by NWS Pittsburgh PA
An estimated 50,542 people live within 50 km of this point.
Nearby, since 12 March 2026
- July 5, 2026 · score 39 · 11.0 km
- May 28, 2026 · score 39 · 13.6 km
- August 10, 2026 · score 39 · 14.1 km
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 32 out of 100, at 91 % 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) | 32 / 100 |
| Our confidence | 91% |
| Coordinates | 39.6969, -81.8103 |
| Nearest City | Zanesville (32 km) |
| Population Exposed | 50.5K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-10T04:06:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.a310f6e442e77b7b9c26e497d70101ad31a56313.001.1 |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Monroe, OH; Noble, OH; Morgan, OH; Morgan, OH; Perry, OH |
| Headline | Flash Flood Warning issued September 10 at 12:06AM EDT until September 10 at 4:00AM EDT by NWS Pittsburgh PA |
| Expires | 2026-09-10T04:00:00-04:00 |
| SenderName | NWS Pittsburgh PA |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.a310f6e442e77b7b9c26e497d70101ad31a56313.001.1","noaa_urn:oid:2.49.0.1.840.0.9de814e60991690551a95e598826405f280783f6.001.1","noaa_urn:oid:2.49.0.1.840.0.c5589eb87fab8f76e4f8efe81784333a2f91e702.001.1"] |
| Spc ReportType | wind |
| Spc Speed | UNK |
| Spc Location | Byesville |
| Spc County | Guernsey |
| Spc State | OH |
| Spc Comments | Report of power line down on car along Spruce Avenue. Time estimated based on radar. (PBZ) |
| Iem TypeSummary | G |
| Iem Magnitude | 39 |
| Iem Unit | MPH |
| Iem City | 4 WNW Somerset |
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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