Right now
The most recent data we hold from NOAA arrived 2 hours 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 20 May 2026 at 02:00 UTC. It is kept here as a record.
It is the 2nd strongest of the 129 detections recorded within 20 km of this point since 27 March 2026. Another comparable one was recorded here earlier the same day. 5 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Watch issued May 19 at 6:29PM EDT until May 19 at 10:00PM EDT by NWS Cleveland OH
Urban PEI: 1,247,659 within a heuristic 50 km radius; not unique people.
Nearby, since 27 March 2026
- September 10, 2026 · score 46 · 0.0 km
- September 9, 2026 · score 46 · 0.0 km
- September 5, 2026 · score 46 · 0.0 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.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
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) | 52 / 100 |
| Legacy data-support index | 0.81/1 |
| Coordinates | 40.4000, -82.9000 |
| Nearest City | Delaware (18 km) |
| Urban exposure index (PEI) | 1.2M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-19T22:29:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Watch_noaa_urn:oid:2.49.0.1.840.0.5bf06eaab3ccb5e50976bd3149ee9775 |
Physical priority index · v1. Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: noaa. Occurrence: 2026-05-19T22:29:00.000Z.
First archived: 2026-05-19T23:24:25.572Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Watch |
| Urgency | Future |
| Certainty | Possible |
| AreaDesc | Ashland, OH; Crawford, OH; Huron, OH; Lorain, OH; Marion, OH; Morrow, OH; Richland, OH; Wyandot, OH; Vermilion to Avon Point OH; Vermilion to Avon Point OH beyond 5 nm off shoreline to US-Canadian border; Reno Beach to The Islands OH; The Islands to Vermilion OH; Reno Beach to The Islands OH beyond 5NM off shoreline to US-Canadian border; The Islands to Vermilion OH beyond 5 nm off shoreline to US-Canadian border and 1 more areas |
| Headline | Severe Thunderstorm Watch issued May 19 at 6:29PM EDT until May 19 at 10:00PM EDT by NWS Cleveland OH |
| Expires | 2026-05-19T22:00:00-04:00 |
| SenderName | NWS Cleveland OH |
| HasExactCoords | false |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.5bf06eaab3ccb5e50976bd3149ee97759e543b0f.003.1","noaa_urn:oid:2.49.0.1.840.0.5bf06eaab3ccb5e50976bd3149ee97759e543b0f.004.1","noaa_urn:oid:2.49.0.1.840.0.5bf06eaab3ccb5e50976bd3149ee97759e543b0f.006.1","noaa_urn:oid:2.49.0.1.840.0.5bf06eaab3ccb5e50976bd3149ee97759e543b0f.005.1"] |
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.
Review the area, threshold and delivery channel in your account.
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