Right now
The most recent data we hold from NOAA arrived 25 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 21 July 2026 at 22:15 UTC. It is kept here as a record.
It is the 9th strongest of the 40 detections recorded within 20 km of this point since 15 March 2026. Another comparable one was recorded here earlier the same day. 3 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 21 at 4:41PM CDT until July 21 at 5:15PM CDT by NWS Louisville KY
Urban PEI: 686,814 within a heuristic 50 km radius; not unique people.
Nearby, since 15 March 2026
- August 11, 2026 · score 48 · 11.4 km
- May 26, 2026 · score 63 · 15.6 km
- August 2, 2026 · score 39 · 22.2 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 41 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) | 41 / 100 |
| Legacy data-support index | 0.79/1 |
| Coordinates | 37.9720, -83.9499 |
| Nearest City | Winchester (20 km) |
| Urban exposure index (PEI) | 686.8K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-21T21:41:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.cd2c8cebc387e90d075ea877d91a331f |
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: 2026-07-21T21:41:00.000Z.
First archived: 2026-07-21T21:42:37.005Z. 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 | Butler, KY; Logan, KY; Warren, KY; Muhlenberg, KY; Butler, KY; Edmonson, KY; Warren, KY and 9 more areas |
| Headline | Severe Thunderstorm Warning issued July 21 at 4:41PM CDT until July 21 at 5:15PM CDT by NWS Louisville KY |
| Expires | 2026-07-21T17:15:00-05:00 |
| SenderName | NWS Louisville KY |
| HasExactCoords | true |
| MergedCount | 12 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.cd2c8cebc387e90d075ea877d91a331f08917010.001.1","noaa_urn:oid:2.49.0.1.840.0.32cc7f148d6969711a063d1b953a321e10274667.001.1","noaa_urn:oid:2.49.0.1.840.0.284dffe20400d5af59244c37feaa24e7398508a6.001.1","noaa_urn:oid:2.49.0.1.840.0.093a0bdce3b440e835ee9a58d992e12ad3820ddb.001.1","noaa_urn:oid:2.49.0.1.840.0.f922a179c7312faa04c6793e3751b31c8e9542bf.001.1","noaa_urn:oid:2.49.0.1.840.0.7721f1bf6df434ea1fa11871c39567e89ee63d38.001.1","noaa_urn:oid:2.49.0.1.840.0.6bbabd02e70f188c17cd242d6fd68dbb57f024e6.002.1","noaa_urn:oid:2.49.0.1.840.0.cd688cf712a302ee5a60c6d9493c3b5684e8be0d.001.1","noaa_urn:oid:2.49.0.1.840.0.17b2ea9678a2138ff060552e6e5e3f88ff3afa93.002.1","noaa_urn:oid:2.49.0.1.840.0.1d458c0b9d1e1612a8f8b40a55e7a7578626494d.001.1","noaa_urn:oid:2.49.0.1.840.0.23cd77b1d75ad0d935b93075a5c96e5f81f22688.001.1","noaa_urn:oid:2.49.0.1.840.0.77de80cf6dc8e542f25a70c43bb20a8e63dcc1f3.001.1"] |
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 Winchester?