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.
Nothing else has been detected within 20 km in the last 24 hours.
This alert expired on 20 September 2026 at 13:45 UTC. It is kept here as a record.
It is the 4th strongest of the 32 detections recorded within 20 km of this point since 12 March 2026. The last comparable one was on 18 September 2026. 7 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flood Warning issued September 20 at 4:45AM EDT until September 20 at 9:45AM EDT by NWS Wilmington OH
Urban PEI: 105,180 within a heuristic 50 km radius; not unique people.
Nearby, since 12 March 2026
- August 12, 2026 · score 39 · 11.6 km
- March 12, 2026 · score 39 · 18.7 km
- September 16, 2026 · score 16 · 22.4 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 37 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 v5. 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 |
| Legacy data-support index | 0.81/1 |
| Coordinates | 40.4115, -84.5039 |
| Nearest City | Sidney (33 km) |
| Urban exposure index (PEI) | 105.2K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-20T14:10:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.baff7ba7dd73092bc70d7dd65caeb6f048738bfa.001.1 |
Physical priority index · v5. 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: 2026-09-20T14:10:00.000Z.
First archived: 2026-09-20T08:52:34.655Z. 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 | Flood Warning |
| Urgency | Expected |
| Certainty | Likely |
| AreaDesc | Clermont, OH; Clinton, OH; Hamilton, OH; Warren, OH; Adams, IN; Allen, IN; Van Wert, OH; Allen, IN and 4 more areas |
| Headline | Flood Warning issued September 20 at 4:45AM EDT until September 20 at 9:45AM EDT by NWS Wilmington OH |
| Expires | 2026-09-20T09:45:00-04:00 |
| SenderName | NWS Wilmington OH |
| HasExactCoords | true |
| MergedCount | 7 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.baff7ba7dd73092bc70d7dd65caeb6f048738bfa.001.1","noaa_urn:oid:2.49.0.1.840.0.b24224ce15daf3c1e095d41e13dc863d5fb5798d.002.1","noaa_urn:oid:2.49.0.1.840.0.b24224ce15daf3c1e095d41e13dc863d5fb5798d.001.1","noaa_urn:oid:2.49.0.1.840.0.8f74390c7f4443d81c157f6eb1ded97cd821f5f0.001.1","noaa_urn:oid:2.49.0.1.840.0.c8b29ad41730f5142b0b2512eaac64414ed6639a.003.1","noaa_urn:oid:2.49.0.1.840.0.c8b29ad41730f5142b0b2512eaac64414ed6639a.004.1","noaa_urn:oid:2.49.0.1.840.0.aaf4d5280c2ca42ed2ab5f0b82f89b288e77e583.001.1"] |
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.
Review the area, threshold and delivery channel in your account.
Want to know when something happens in this area?