Right now
The most recent data we hold from NOAA arrived 5 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 7th strongest of the 55 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. 5 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 21 at 3:05PM 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
- August 7, 2026 · score 43 · 13.9 km
- June 18, 2026 · score 67 · 14.2 km
- September 10, 2026 · score 37 · 14.9 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 | 0.80/1 |
| Coordinates | 38.8261, -82.7343 |
| Nearest City | Portsmouth (25 km) |
| Urban exposure index (PEI) | 330.2K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-21T19:05:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.f760c28469949a1d6ec9ba656e20af5d |
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: 2026-07-21T19:05:00.000Z.
First archived: 2026-07-21T19:08:48.226Z. 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 | Brown, OH; Clinton, OH; Fayette, OH; Highland, OH; Clermont, OH; Hamilton, OH; Warren, OH; Cabell, WV; Kanawha, WV; Putnam, WV and 16 more areas |
| Headline | Severe Thunderstorm Warning issued July 21 at 3:05PM 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.f760c28469949a1d6ec9ba656e20af5d4553dd6b.002.1","noaa_urn:oid:2.49.0.1.840.0.ada51f22240652928bd1455e4f93b15bcd9637a4.001.1","noaa_urn:oid:2.49.0.1.840.0.82a6fe989e1666711b55d6f00846929873222613.002.1","noaa_urn:oid:2.49.0.1.840.0.3745c1f88ecce837d8a23abc05d5b3d2ed3531f1.001.1","noaa_urn:oid:2.49.0.1.840.0.2978fed1212216abb3cf9afb4d15dd2fd57628e4.001.1","noaa_urn:oid:2.49.0.1.840.0.69bc7c47483de81a68c9c1b751612bead0550d46.001.1","noaa_urn:oid:2.49.0.1.840.0.b4f2dbc51cb95c5ef3e53eb241ff520bc424f8b5.001.1","noaa_urn:oid:2.49.0.1.840.0.b2ec8be9db8473bd0244f3df9566dbbf0dd85269.001.1","noaa_urn:oid:2.49.0.1.840.0.254854ded84af42233aa8c04a98f3ad152717a5f.001.1","noaa_urn:oid:2.49.0.1.840.0.be3cb772b82f4c7b9951961c13401311d6ff7b51.001.1","noaa_urn:oid:2.49.0.1.840.0.2c63e9fecec815782248469185ece150fdac70b1.001.1","noaa_urn:oid:2.49.0.1.840.0.1c0a6963d4a5a76a66564605061bd0749e2c153e.001.1","noaa_urn:oid:2.49.0.1.840.0.b3340c321057245ed317565f95a3a951821bf697.002.1","noaa_urn:oid:2.49.0.1.840.0.43577fa990da1c3fc3c9b5ef65e6b19fc7678761.001.1","noaa_urn:oid:2.49.0.1.840.0.8370d101e2382827acc1f805e5fcd283b78576bd.001.1","noaa_urn:oid:2.49.0.1.840.0.675dd60670950d8845b1fb6a082ba8ffd8ad0c5a.001.1","noaa_urn:oid:2.49.0.1.840.0.c12047b8472026f9d3f0475ca437706ef8935cc0.001.1","noaa_urn:oid:2.49.0.1.840.0.238094bce29e0e3e5678e969bc235b6134ad0f96.001.1","noaa_urn:oid:2.49.0.1.840.0.d551571055206d0dfec3f917186a6157c06fc294.001.1"] |
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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