Right now
The most recent data we hold from NOAA arrived 20 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 34 detections recorded within 20 km of this point since 16 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 5:57PM EDT until July 21 at 6:15PM EDT by NWS Louisville KY
Urban PEI: 686,814 within a heuristic 50 km radius; not unique people.
Nearby, since 16 March 2026
- August 11, 2026 · score 48 · 2.6 km
- May 26, 2026 · score 63 · 17.6 km
- August 2, 2026 · score 39 · 18.9 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 | 37.8913, -83.9832 |
| Nearest City | Winchester (20 km) |
| Urban exposure index (PEI) | 686.8K within 50 km |
| Impact Tier | significant |
| Date | 2026-07-21 — time not reported by the source |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.7e2ca1321c7a70e22c8f4810e34128da |
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: 2026-07-21 — time not reported.
First archived: 2026-07-21T21:58:03.266Z. 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 | Casey, KY; Clark, KY; Garrard, KY; Lincoln, KY; Madison, KY; Edmonson, KY; Grayson, KY; Hardin, KY; Hart, KY; Larue, KY; Bath, KY; Menifee, KY; Montgomery, KY; Morgan, KY; Rowan, KY and 13 more areas |
| Headline | Severe Thunderstorm Warning issued July 21 at 5:57PM EDT until July 21 at 6:15PM EDT by NWS Louisville KY |
| Expires | 2026-07-21T18:15:00-04:00 |
| SenderName | NWS Louisville KY |
| HasExactCoords | true |
| MergedCount | 16 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.7e2ca1321c7a70e22c8f4810e34128dab6ece15c.001.1","noaa_urn:oid:2.49.0.1.840.0.18f8e8e80b42c48a7569503dd8b84294fff4bbda.001.1","noaa_urn:oid:2.49.0.1.840.0.0d1bb249c2c3cec4f418605040debd53abf565c0.001.1","noaa_urn:oid:2.49.0.1.840.0.b853a61f236c187c4e4db8bacfdef1caf434b3be.001.1","noaa_urn:oid:2.49.0.1.840.0.5f86391974e3730725889094be20ffe4721eff42.001.1","noaa_urn:oid:2.49.0.1.840.0.3d8bc0065d8449f4f9bccaeca5b1fb1ad058ae69.002.1","noaa_urn:oid:2.49.0.1.840.0.8034b8217a309e7162838664048effd1bda5ff2d.001.1","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.cd688cf712a302ee5a60c6d9493c3b5684e8be0d.001.1","noaa_urn:oid:2.49.0.1.840.0.093a0bdce3b440e835ee9a58d992e12ad3820ddb.001.1","noaa_urn:oid:2.49.0.1.840.0.2170b23d2803cb19dde1f0f764b40d36c7e814fd.001.1","noaa_urn:oid:2.49.0.1.840.0.767541f18fe415ce57110315cf3c178d9150815f.001.1","noaa_urn:oid:2.49.0.1.840.0.445581dfceba5cae88035231fd6d54850dd0e49c.001.1","noaa_urn:oid:2.49.0.1.840.0.bd55adae5088c0b1abc65bf93b59146a04666a30.001.1"] |
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.
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