Right now
The most recent data we hold from NOAA arrived 14 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 28 July 2026 at 00:00 UTC. It is kept here as a record.
It is the 4th strongest of the 191 detections recorded within 20 km of this point since 12 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: Severe Thunderstorm Warning issued July 27 at 7:23PM EDT until July 27 at 8:00PM EDT by NWS Wilmington OH
Urban PEI: 1,429,524 within a heuristic 50 km radius; not unique people.
Nearby, since 12 March 2026
- September 4, 2026 · score 46 · 8.6 km
- March 16, 2026 · score 52 · 8.6 km
- September 5, 2026 · score 46 · 13.2 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 52 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 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) | 52 / 100 |
| Legacy data-support index | 0.80/1 |
| Coordinates | 39.7842, -86.3559 |
| Nearest City | Avon (5 km) |
| Urban exposure index (PEI) | 1.4M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-27T23:23:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.38952662ded10a6834b0a1bfbee826e0 |
Physical priority index · v1. 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: 2026-07-27T23:23:00.000Z.
First archived: 2026-07-27T23:29:00.500Z. 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 | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Campbell, KY; Kenton, KY; Brown, OH; Clermont, OH; Clinton, OH; Hamilton, OH; Highland, OH; Warren, OH; Clinton, OH; Warren, OH; Bartholomew, IN; Brown, IN; Decatur, IN; Johnson, IN; Morgan, IN; Shelby, IN and 4 more areas |
| Headline | Severe Thunderstorm Warning issued July 27 at 7:23PM EDT until July 27 at 8:00PM EDT by NWS Wilmington OH |
| Expires | 2026-07-27T20:00:00-04:00 |
| SenderName | NWS Wilmington OH |
| HasExactCoords | true |
| MergedCount | 7 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.38952662ded10a6834b0a1bfbee826e0455eb143.002.1","noaa_urn:oid:2.49.0.1.840.0.f4004cc1b2b6fa6b034a4831e8be49e89084b1aa.002.1","noaa_urn:oid:2.49.0.1.840.0.0afbdbcae0e29dcf5027dc951ad60d5a3a99d7c7.001.1","noaa_urn:oid:2.49.0.1.840.0.e9575f9100c1b75044f72e05b024a3c355855bb8.001.1","noaa_urn:oid:2.49.0.1.840.0.52ad6129d37f84b095282c0199a778b23479139e.001.1","noaa_urn:oid:2.49.0.1.840.0.fab6432fabb064ee7d4e3ea137012ce9caa049f9.001.1","noaa_urn:oid:2.49.0.1.840.0.013314f3348cba999e7d153f505816d816058a8e.001.1"] |
Safety Information
Always follow official guidance from your local emergency management agency. This platform provides scientific monitoring data and is not a substitute for official warnings. If you are in immediate danger, contact your local emergency number.
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 near Avon?