Right now
The most recent data we hold from NOAA arrived 1 minute 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 19:30 UTC. It is kept here as a record.
It is the 24th strongest of the 40 detections recorded within 20 km of this point since 24 May 2026. Another comparable one was recorded here earlier the same day. 4 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 21 at 3:17PM EDT until July 21 at 3:30PM EDT by NWS Louisville KY
Urban PEI: 20,409 within a heuristic 50 km radius; not unique people.
Nearby, since 24 May 2026
- September 20, 2026 · score 37 · 15.3 km
- July 21, 2026 · score 67 · 20.4 km
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 | 38.7399, -83.2284 |
| Nearest City | Portsmouth (20 km) |
| Urban exposure index (PEI) | 20.4K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-21T19:17:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.e6428233ea5ba8d145b3c3fe43a896b3 |
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: 2026-07-21T19:17:00.000Z.
First archived: 2026-07-21T19:19:01.664Z. 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 | Dubois, IN; Perry, IN; Bullitt, KY; Jefferson, KY; Oldham, KY; Shelby, KY; Spencer, KY; Clark, IN; Crawford, IN; Floyd, IN; Harrison, IN; Perry, IN; Jefferson, KY; Meade, KY and 12 more areas |
| Headline | Severe Thunderstorm Warning issued July 21 at 3:17PM EDT until July 21 at 3:30PM EDT by NWS Louisville KY |
| Expires | 2026-07-21T15:30:00-04:00 |
| SenderName | NWS Louisville KY |
| HasExactCoords | true |
| MergedCount | 15 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.e6428233ea5ba8d145b3c3fe43a896b348ffc23d.002.1","noaa_urn:oid:2.49.0.1.840.0.f6e1183cde80fce5f28f7897ecfa6030346b18ab.001.1","noaa_urn:oid:2.49.0.1.840.0.3d6e377f7f0a94cd2188443dbff41557da88c7de.001.1","noaa_urn:oid:2.49.0.1.840.0.85146fbd70c755def9b5d7a5f4dc3d79eed01ba4.001.1","noaa_urn:oid:2.49.0.1.840.0.2ff7031c2508f0e2ccd2407e9f3a926c8ec18a05.001.1","noaa_urn:oid:2.49.0.1.840.0.f8c06b5f5e5cc1d98f44d5464394c16a5d3df067.002.1","noaa_urn:oid:2.49.0.1.840.0.d7f2f80d0b7c565dd10a7bf08ba00c9713c62c42.001.1","noaa_urn:oid:2.49.0.1.840.0.f760c28469949a1d6ec9ba656e20af5d4553dd6b.002.1","noaa_urn:oid:2.49.0.1.840.0.675dd60670950d8845b1fb6a082ba8ffd8ad0c5a.001.1","noaa_urn:oid:2.49.0.1.840.0.2978fed1212216abb3cf9afb4d15dd2fd57628e4.001.1","noaa_urn:oid:2.49.0.1.840.0.b4f2dbc51cb95c5ef3e53eb241ff520bc424f8b5.001.1","noaa_urn:oid:2.49.0.1.840.0.be3cb772b82f4c7b9951961c13401311d6ff7b51.001.1","noaa_urn:oid:2.49.0.1.840.0.1c0a6963d4a5a76a66564605061bd0749e2c153e.001.1","noaa_urn:oid:2.49.0.1.840.0.c12047b8472026f9d3f0475ca437706ef8935cc0.001.1","noaa_urn:oid:2.49.0.1.840.0.64436041ee0866d350de4ed474ff9074e5a7f895.001.1"] |
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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