Right now
The most recent data we hold from NOAA arrived 4 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 16:37 UTC. It is kept here as a record.
It is the 9th strongest of the 39 detections recorded within 20 km of this point since 22 March 2026. Another comparable one was recorded here earlier the same day. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 21 at 12:27PM EDT until July 21 at 12:30PM EDT by NWS Cleveland OH
An estimated 17,484 people live within 50 km of this point.
Nearby, since 22 March 2026
- June 25, 2026 · score 67 · 15.5 km
- June 14, 2026 · score 43 · 16.1 km
- August 9, 2026 · score 43 · 17.9 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 34 out of 100, at 81 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
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) | 34 / 100 |
| Our confidence | 81% |
| Coordinates | 40.2902, -81.2341 |
| Nearest City | New Philadelphia (29 km) |
| Population Exposed | 17.5K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-21T16:27:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.f0ad4277beb17a5b8cd8783df0fb9720 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Stark, OH; Summit, OH; Athens, OH; Washington, OH; Pleasants, WV; Wood, WV; Carroll, OH; Columbiana, OH; Jefferson, OH; Beaver, PA; Butler, PA; Lawrence, PA; Hancock, WV |
| Headline | Severe Thunderstorm Warning issued July 21 at 12:27PM EDT until July 21 at 12:30PM EDT by NWS Cleveland OH |
| Expires | 2026-07-21T12:37:00-04:00 |
| SenderName | NWS Cleveland OH |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.f0ad4277beb17a5b8cd8783df0fb972091a4ee09.001.1","noaa_urn:oid:2.49.0.1.840.0.25bef22a5b76b29aaa9db3573d48efda666b19ae.001.1","noaa_urn:oid:2.49.0.1.840.0.00aac0133546278ff6b6ac459d383a1a5df7ce27.001.1"] |
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.
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