Right now
The most recent data we hold from NOAA arrived 10 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 22:00 UTC. It is kept here as a record.
It is the 8th strongest of the 28 detections recorded within 20 km of this point since 15 March 2026. Another comparable one was recorded here earlier the same day. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 21 at 5:20PM EDT until July 21 at 6:00PM EDT by NWS Louisville KY
Urban PEI: 18,446 within a heuristic 50 km radius; not unique people.
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 28 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) | 28 / 100 |
| Legacy data-support index | 0.79/1 |
| Coordinates | 38.1342, -83.8187 |
| Nearest City | Winchester (35 km) |
| Urban exposure index (PEI) | 18.4K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-21T21:20:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.65dab9031d4f36ac31b8dc39e1d71375 |
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: 2026-07-21T21:20:00.000Z.
First archived: 2026-07-21T21:22:03.585Z. 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 | Adair, KY; Boyle, KY; Casey, KY; Green, KY; Hart, KY; Larue, KY; Lincoln, KY; Marion, KY; Taylor, KY; Butler, KY; Edmonson, KY; Grayson, KY; Ohio, KY; Boyle, KY; Clark, KY; Fayette, KY; Garrard, KY; Jessamine, KY; Lincoln, KY; Madison, KY; Mercer, KY and 8 more areas |
| Headline | Severe Thunderstorm Warning issued July 21 at 5:20PM EDT until July 21 at 6:00PM EDT by NWS Louisville KY |
| Expires | 2026-07-21T18:00:00-04:00 |
| SenderName | NWS Louisville KY |
| HasExactCoords | true |
| MergedCount | 11 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.65dab9031d4f36ac31b8dc39e1d713751fefcd28.001.1","noaa_urn:oid:2.49.0.1.840.0.917de4d9dbe49d5852a834adc00f2e4a03fad683.001.1","noaa_urn:oid:2.49.0.1.840.0.f922a179c7312faa04c6793e3751b31c8e9542bf.001.1","noaa_urn:oid:2.49.0.1.840.0.db30f56638c079df43e74195621d44b5e133e0cc.002.1","noaa_urn:oid:2.49.0.1.840.0.f7f27e18de8f7452037b485952016a370037f67a.001.1","noaa_urn:oid:2.49.0.1.840.0.81af87f7c58a1e35b3ebcde736c90db74cc41899.001.1","noaa_urn:oid:2.49.0.1.840.0.7721f1bf6df434ea1fa11871c39567e89ee63d38.001.1","noaa_urn:oid:2.49.0.1.840.0.33af16c51c957a832a4f2400e6e47529267a8ad9.002.1","noaa_urn:oid:2.49.0.1.840.0.92354c0b14de8b6c3b5ac61781dbe9037f5206da.001.1","noaa_urn:oid:2.49.0.1.840.0.211ba30aac21657f58a6e6bde622a5384c2f9080.001.1","noaa_urn:oid:2.49.0.1.840.0.fa356bb7e5a29fdada1e06726a7a57cb0922db9b.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.
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