This alert expired on 14 June 2026 at 20:52 UTC. It is kept here as a record.
It is the 4th strongest of the 28 detections recorded within 20 km of this point since 16 March 2026. The last comparable one was on 17 March 2026.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 14 at 4:42PM EDT until June 14 at 4:45PM EDT by NWS Cleveland OH
An estimated 405,430 people live within 50 km of this point.
Nearby, since 16 March 2026
- June 25, 2026 · score 67 · 12.9 km
- June 14, 2026 · score 43 · 20.8 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 80 % 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 | 80% |
| Coordinates | 40.8577, -80.9565 |
| Nearest City | Alliance (15 km) |
| Population Exposed | 405.4K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-14T20:42:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.45842e0abdb911911550cba9ed7e32dd |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Ashtabula, OH; Mercer, PA; Venango, PA; Carroll, OH; Columbiana, OH; Coshocton, OH; Guernsey, OH; Harrison, OH; Muskingum, OH; Tuscarawas, OH and 8 more areas |
| Headline | Severe Thunderstorm Warning issued June 14 at 4:42PM EDT until June 14 at 4:45PM EDT by NWS Cleveland OH |
| Expires | 2026-06-14T16:52:00-04:00 |
| SenderName | NWS Cleveland OH |
| HasExactCoords | true |
| MergedCount | 11 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.45842e0abdb911911550cba9ed7e32ddbaa92b79.001.1","noaa_urn:oid:2.49.0.1.840.0.4aef9a023d79beaede646c885e932b052ac5a309.001.1","noaa_urn:oid:2.49.0.1.840.0.7d68aa1158d0a13386dd35f936a9b5e01a395c76.001.1","noaa_urn:oid:2.49.0.1.840.0.0809144152e7027e2af1d5a5a183922a8d052dff.001.1","noaa_urn:oid:2.49.0.1.840.0.b0f5fae753e8826a160a5597136076a15073b12f.002.1","noaa_urn:oid:2.49.0.1.840.0.6a7b31143693053a95e0dfed55aa803602148602.001.1","noaa_urn:oid:2.49.0.1.840.0.02ee9ecd095e8388c7edaabd09922d39b42ef686.001.1","noaa_urn:oid:2.49.0.1.840.0.4828cd2da84dce0ba330f1b09632574f7aca39d2.001.1","noaa_urn:oid:2.49.0.1.840.0.0828622c5ad1766936ef2915bafc43e901b8982c.002.1","noaa_urn:oid:2.49.0.1.840.0.d554d4785598c024f1ef583452794c230bfcf32c.001.1","noaa_urn:oid:2.49.0.1.840.0.410eb6d7f2912859a53845421854ca5ee3e9dc58.001.1"] |
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 Alliance?
Calamity.live data shows a weather event with CalamityScore 43/100, near Alliance (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.