This alert expired on 18 July 2026 at 21:00 UTC. It is kept here as a record.
It is the 4th strongest of the 25 detections recorded within 20 km of this point since 13 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 18 at 4:44PM EDT until July 18 at 5:00PM EDT by NWS Cleveland OH
An estimated 30,075 people live within 50 km of this point.
Nearby, since 13 March 2026
- August 2, 2026 · score 58 · 9.8 km
- August 9, 2026 · score 34 · 16.1 km
- March 13, 2026 · score 34 · 19.3 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 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) | 34 / 100 |
| Our confidence | 79% |
| Coordinates | 41.6989, -79.2965 |
| Nearest City | Jamestown (45 km) |
| Population Exposed | 30.1K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-18T20:44:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.0ba34488091f72fe4ac7ad57b102730f |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Erie, PA; Cuyahoga, OH; Lorain, OH; Summit, OH; Clarion, PA; Venango, PA and 7 more areas |
| Headline | Severe Thunderstorm Warning issued July 18 at 4:44PM EDT until July 18 at 5:00PM EDT by NWS Cleveland OH |
| Expires | 2026-07-18T17:00:00-04:00 |
| SenderName | NWS Cleveland OH |
| HasExactCoords | true |
| MergedCount | 10 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.0ba34488091f72fe4ac7ad57b102730f52cc5c8c.001.1","noaa_urn:oid:2.49.0.1.840.0.0387c6742173e9e557d90d73a8d355e5c7acf4b8.002.1","noaa_urn:oid:2.49.0.1.840.0.c9b95914f89709c2d31455f0621270b4b7f66401.001.1","noaa_urn:oid:2.49.0.1.840.0.d07f054b10f1dd99419f5754e9f21fbef2db3f70.001.1","noaa_urn:oid:2.49.0.1.840.0.9fb649df8b7ef718544850f7bfcb65804d96e1ed.001.1","noaa_urn:oid:2.49.0.1.840.0.fe24f5d5e19f6ef6f25719c460d360b8a68addad.001.1","noaa_urn:oid:2.49.0.1.840.0.a8f6b6ce86239cf6a03c46b1dadf460dc6d2e6b6.001.1","noaa_urn:oid:2.49.0.1.840.0.54faa61c5c3775d5555b5037bd4d4e2e2d35f5c6.001.1","noaa_urn:oid:2.49.0.1.840.0.edaa375bc1c24c9d35b8589a1835aac07e796b26.001.1","noaa_urn:oid:2.49.0.1.840.0.646f493f6814a5f25eef76b993a6a4fbf23aa6da.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.
Calamity.live data shows a weather event with CalamityScore 34/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.