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 21 July 2026 at 19:30 UTC. It is kept here as a record.
It is the 8th strongest of the 56 detections recorded within 20 km of this point since 16 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 Warning issued July 21 at 2:50PM EDT until July 21 at 3:30PM EDT by NWS Wilmington OH
Urban PEI: 330,166 within a heuristic 50 km radius; not unique people.
Nearby, since 16 March 2026
- September 10, 2026 · score 37 · 4.5 km
- August 5, 2026 · score 43 · 10.6 km
- September 20, 2026 · score 37 · 22.0 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 37 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) | 37 / 100 |
| Legacy data-support index | 0.79/1 |
| Coordinates | 38.7500, -82.8994 |
| Nearest City | Portsmouth (9 km) |
| Urban exposure index (PEI) | 330.2K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-21T18:50:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.be3cb772b82f4c7b9951961c13401311 |
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: 2026-07-21T18:50:00.000Z.
First archived: 2026-07-21T18:53:20.688Z. 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 | Switzerland, IN; Carroll, KY; Gallatin, KY; Grant, KY; Owen, KY; Clark, IN; Brown, OH; Clermont, OH; Clinton, OH; Fayette, OH; Greene, OH; Highland, OH; Warren, OH and 16 more areas |
| Headline | Severe Thunderstorm Warning issued July 21 at 2:50PM EDT until July 21 at 3:30PM EDT by NWS Wilmington OH |
| Expires | 2026-07-21T15:30:00-04:00 |
| SenderName | NWS Wilmington OH |
| HasExactCoords | true |
| MergedCount | 19 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.be3cb772b82f4c7b9951961c13401311d6ff7b51.001.1","noaa_urn:oid:2.49.0.1.840.0.806d146bcedbae5584b242fbe7ef77437d7491bf.002.1","noaa_urn:oid:2.49.0.1.840.0.4e06b3bcce54ac26c6914cdfc6c4d3593a01b759.001.1","noaa_urn:oid:2.49.0.1.840.0.500132d11c3907b14e13a4732e59d51626c844bd.002.1","noaa_urn:oid:2.49.0.1.840.0.c8300301331134d5e660efb8fca131851bfa901d.001.1","noaa_urn:oid:2.49.0.1.840.0.2c63e9fecec815782248469185ece150fdac70b1.001.1","noaa_urn:oid:2.49.0.1.840.0.f670e101ef5d6eb69713173cd124c22d40dc8c29.001.1","noaa_urn:oid:2.49.0.1.840.0.9d8a40c09bfebf4f65ed26ca12e2c2c61043f749.001.1","noaa_urn:oid:2.49.0.1.840.0.14872b7675a7247011d06fffad954c337ff2b988.001.1","noaa_urn:oid:2.49.0.1.840.0.1c0a6963d4a5a76a66564605061bd0749e2c153e.001.1","noaa_urn:oid:2.49.0.1.840.0.209c4a6fb22aa5de83da348cddf2dc77b77910f9.001.1","noaa_urn:oid:2.49.0.1.840.0.b3340c321057245ed317565f95a3a951821bf697.002.1","noaa_urn:oid:2.49.0.1.840.0.964f40077530df08986f243c3edba4cd0cef6f15.001.1","noaa_urn:oid:2.49.0.1.840.0.b1fff1e6f2a89a43ecb11fe49bf2e9dad3cc5012.001.1","noaa_urn:oid:2.49.0.1.840.0.52230450343f7d838467f7340696fcdebcb0aa91.001.1","noaa_urn:oid:2.49.0.1.840.0.88b59e3b7fa78616381e0bfad85c15a33db44564.001.1","noaa_urn:oid:2.49.0.1.840.0.809b38bb5c91e1ae2e23d0078ffec3137da4d5cc.001.1","noaa_urn:oid:2.49.0.1.840.0.238094bce29e0e3e5678e969bc235b6134ad0f96.001.1","noaa_urn:oid:2.49.0.1.840.0.baaa658413764fe35e7ff358c3a968bf2acf4bfc.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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