This alert expired on 18 July 2026 at 22:34 UTC. It is kept here as a record.
It is the 8th strongest of the 76 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. 30 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 18 at 6:24PM EDT until July 18 at 6:30PM EDT by NWS Cleveland OH
An estimated 249,035 people live within 50 km of this point.
Nearby, since 16 March 2026
- June 25, 2026 · score 67 · 11.0 km
- July 21, 2026 · score 43 · 11.5 km
- June 14, 2026 · score 43 · 11.9 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 43 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) | 43 / 100 |
| Our confidence | 79% |
| Coordinates | 40.8775, -80.6785 |
| Nearest City | Boardman (16 km) |
| Population Exposed | 249.0K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-18T22:24:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.a93625b0dedb638b74bb8692eca9a628 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Mahoning, OH; Knox, OH; Marion, OH; Morrow, OH; Clearfield, PA and 6 more areas |
| Headline | Severe Thunderstorm Warning issued July 18 at 6:24PM EDT until July 18 at 6:30PM EDT by NWS Cleveland OH |
| Expires | 2026-07-18T18:34:00-04:00 |
| SenderName | NWS Cleveland OH |
| HasExactCoords | true |
| MergedCount | 9 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.a93625b0dedb638b74bb8692eca9a6284dc1ef98.001.1","noaa_urn:oid:2.49.0.1.840.0.a431cd5efe72582c0c22c56224993871f9f5b9c6.002.1","noaa_urn:oid:2.49.0.1.840.0.208e86e12bcdfa15e1bd499627f94de0cea251e8.001.1","noaa_urn:oid:2.49.0.1.840.0.f2585fdd4e6614e59af38d50f5cfa7c320bc6a5c.001.1","noaa_urn:oid:2.49.0.1.840.0.0d5ac748953b78dc0beda360c48e92d0a6a34135.001.1","noaa_urn:oid:2.49.0.1.840.0.286451350240a5a8fb4637ffeb98588330decd93.002.1","noaa_urn:oid:2.49.0.1.840.0.37fda6063f87f385788d17fbc9c51ae33b175296.001.1","noaa_urn:oid:2.49.0.1.840.0.45805d83b9961f4a49b0422b4e77249a09f0e82f.002.1","noaa_urn:oid:2.49.0.1.840.0.a96fdab10c88fa0cddbbafd70b2b29e9f59e1567.001.1"] |
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 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 Boardman?
Calamity.live data shows a weather event with CalamityScore 43/100, near Boardman (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.