Right now
The most recent data we hold from NOAA arrived 2 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 22 July 2026 at 02:00 UTC. It is kept here as a record.
It is the 333rd strongest of the 456 detections recorded within 20 km of this point since 10 March 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 Watch issued July 21 at 2:22PM EDT until July 21 at 10:00PM EDT by NWS Louisville KY
Urban PEI: 1,525,459 within a heuristic 50 km radius; not unique people.
Nearby, since 10 March 2026
- September 5, 2026 · score 46 · 0.0 km
- August 13, 2026 · score 52 · 0.0 km
- August 12, 2026 · score 52 · 0.0 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 46 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) | 46 / 100 |
| Legacy data-support index | 0.79/1 |
| Coordinates | 39.8000, -86.1000 |
| Nearest City | Indianapolis (6 km) |
| Urban exposure index (PEI) | 1.5M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-21T18:22:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Watch_noaa_urn:oid:2.49.0.1.840.0.d43e5afc8cd886f1fa130214b0902a1c |
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: 2026-07-21T18:22:00.000Z.
First archived: 2026-07-21T19:34:19.019Z. 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 Watch |
| Urgency | Future |
| Certainty | Possible |
| AreaDesc | Clark, IN; Crawford, IN; Dubois, IN; Floyd, IN; Harrison, IN; Jefferson, IN; Orange, IN; Perry, IN; Scott, IN; Washington, IN; Adair, KY; Allen, KY; Anderson, KY; Barren, KY; Bourbon, KY; Boyle, KY; Breckinridge, KY; Bullitt, KY; Butler, KY; Casey, KY; Clark, KY; Clinton, KY; Cumberland, KY; Edmonson, KY; Fayette, KY; Franklin, KY; Garrard, KY; Grayson, KY; Green, KY; Hancock, KY; Hardin, KY; Harrison, KY; Hart, KY; Henry, KY; Jefferson, KY; Jessamine, KY; Larue, KY; Lincoln, KY; Logan, KY; Madison, KY; Marion, KY; Meade, KY; Mercer, KY; Metcalfe, KY; Monroe, KY; Nelson, KY; Nicholas, KY; Ohio, KY; Oldham, KY; Russell, KY; Scott, KY; Shelby, KY; Simpson, KY; Spencer, KY; Taylor, KY; Trimble, KY; Warren, KY; Washington, KY; Woodford, KY; Dearborn, IN; Fayette, IN; Franklin, IN; Ohio, IN; Ripley, IN; Switzerland, IN; Union, IN; Wayne, IN; Boone, KY; Bracken, KY; Campbell, KY; Carroll, KY; Gallatin, KY; Grant, KY; Kenton, KY; Lewis, KY; Mason, KY; Owen, KY; Pendleton, KY; Robertson, KY; Adams, OH; Brown, OH; Butler, OH; Champaign, OH; Clark, OH; Clermont, OH; Clinton, OH; Darke, OH; Delaware, OH; Fairfield, OH; Fayette, OH; Franklin, OH; Greene, OH; Hamilton, OH; Highland, OH; Hocking, OH; Licking, OH; Logan, OH; Madison, OH; Miami, OH; Montgomery, OH; Pickaway, OH; Pike, OH; Preble, OH; Ross, OH; Scioto, OH; Shelby, OH; Union, OH; Warren, OH |
| Headline | Severe Thunderstorm Watch issued July 21 at 2:22PM EDT until July 21 at 10:00PM EDT by NWS Louisville KY |
| Expires | 2026-07-21T22:00:00-04:00 |
| SenderName | NWS Louisville KY |
| HasExactCoords | false |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.d43e5afc8cd886f1fa130214b0902a1c2ede72e6.001.1","noaa_urn:oid:2.49.0.1.840.0.7a1b4dd04b53882c328080bbf56d606feaf5533f.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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