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 28 July 2026 at 20:45 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 17 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 28 at 4:31PM EDT until July 28 at 4:45PM EDT by NWS Jackson KY
Urban PEI: 162,848 within a heuristic 50 km radius; not unique people.
Nearby, since 17 March 2026
- July 19, 2026 · score 43 · 7.1 km
- July 11, 2026 · score 43 · 7.5 km
- August 12, 2026 · score 43 · 8.8 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 43 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) | 43 / 100 |
| Legacy data-support index | 0.79/1 |
| Coordinates | 36.6428, -82.4356 |
| Nearest City | Kingsport (15 km) |
| Urban exposure index (PEI) | 162.8K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-28T20:31:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.271d581a284f363fbc21860a13f3af0e |
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: 2026-07-28T20:31:00.000Z.
First archived: 2026-07-28T20:34:30.196Z. 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 | Bell, KY; Clay, KY; Knox, KY; Leslie, KY; Carter, TN; Johnson, TN; Sullivan, TN; Unicoi, TN; Washington, TN; Harlan, KY; Leslie, KY; Letcher, KY; Perry, KY and 8 more areas |
| Headline | Severe Thunderstorm Warning issued July 28 at 4:31PM EDT until July 28 at 4:45PM EDT by NWS Jackson KY |
| Expires | 2026-07-28T16:45:00-04:00 |
| SenderName | NWS Jackson KY |
| HasExactCoords | true |
| MergedCount | 11 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.271d581a284f363fbc21860a13f3af0e9198cf39.001.1","noaa_urn:oid:2.49.0.1.840.0.9779e3ff8094f083d042d15d8a9d459ec1bb748a.001.1","noaa_urn:oid:2.49.0.1.840.0.aeafcd1f37f16d9aa4393d7033e347f0de57c7d0.001.1","noaa_urn:oid:2.49.0.1.840.0.540657b0c49550346496182059f916d058b70111.001.1","noaa_urn:oid:2.49.0.1.840.0.0590416ddbb632ea9786b7dc30fc278d71a6331c.002.1","noaa_urn:oid:2.49.0.1.840.0.4ba8634163a3fc4d9c42ebf773f46644689b2f38.001.1","noaa_urn:oid:2.49.0.1.840.0.70aa937d1a090d2d75c1abfe2b26486766430944.001.1","noaa_urn:oid:2.49.0.1.840.0.8a9e822d23839ac5d59499dfcd1241aea1976342.001.1","noaa_urn:oid:2.49.0.1.840.0.b532309d82922e7f3ba55178e9cfee697b48f2a8.001.1","noaa_urn:oid:2.49.0.1.840.0.0920bd4ceb93ebfe2ff365adfa0c831699093532.001.1","noaa_urn:oid:2.49.0.1.840.0.3922f7a24ee69fbbb95d114991c4f67361f0819e.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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