This alert expired on 4 July 2026 at 01:00 UTC. It is kept here as a record.
It is the 2nd strongest of the 56 detections recorded within 20 km of this point since 17 March 2026. The last comparable one was on 25 June 2026. 4 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 3 at 8:09PM EDT until July 3 at 9:00PM EDT by NWS Pittsburgh PA
An estimated 1,918,836 people live within 50 km of this point.
Nearby, since 17 March 2026
- July 4, 2026 · score 52 · 7.2 km
- June 14, 2026 · score 76 · 8.5 km
- June 14, 2026 · score 52 · 10.6 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 52 out of 100, at 79 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | medium |
| Calamity Score (ours) | 52 / 100 |
| Our confidence | 79% |
| Coordinates | 41.2458, -81.4103 |
| Nearest City | Hudson (3 km) |
| Population Exposed | 1.9M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-04T00:09:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.6248217c9a0f0780d9292f3fc72e1624 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Clarion, PA; Forest, PA; Mercer, PA; Venango, PA; Cuyahoga, OH; Lorain, OH; Armstrong, PA; Butler, PA; Clarion, PA; Venango, PA and 2 more areas |
| Headline | Severe Thunderstorm Warning issued July 3 at 8:09PM EDT until July 3 at 9:00PM EDT by NWS Pittsburgh PA |
| Expires | 2026-07-03T21:00:00-04:00 |
| SenderName | NWS Pittsburgh PA |
| HasExactCoords | true |
| MergedCount | 5 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.6248217c9a0f0780d9292f3fc72e162435bd1dc5.001.1","noaa_urn:oid:2.49.0.1.840.0.23bc24d5a5660cd566bfdbca6747a69c85461f87.001.1","noaa_urn:oid:2.49.0.1.840.0.14ed9d519b6737e4c0515a4664c0abad34579c5d.001.1","noaa_urn:oid:2.49.0.1.840.0.cae5c42e8c1f7cd7846d3a140becb2b12674aa0c.001.1","noaa_urn:oid:2.49.0.1.840.0.0a1e4ef08bb0db6e0a2f45f9d63af3182f228fe8.002.1"] |
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 10 February 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.
Want to know when something happens near Hudson?
Calamity.live data shows a weather event with CalamityScore 52/100, near Hudson (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.