Right now
The most recent data we hold from NOAA arrived 4 minutes 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 19 May 2026 at 22:45 UTC. It is kept here as a record.
It is the 5th strongest of the 54 detections recorded within 20 km of this point since 15 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 Warning issued May 19 at 6:25PM EDT until May 19 at 6:45PM EDT by NWS Cleveland OH
Urban PEI: 121,505 within a heuristic 50 km radius; not unique people.
Nearby, since 15 March 2026
- July 3, 2026 · score 43 · 13.0 km
- July 11, 2026 · score 39 · 15.5 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.
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) | 43 / 100 |
| Legacy data-support index | 0.81/1 |
| Coordinates | 40.0181, -84.7443 |
| Nearest City | Richmond (24 km) |
| Urban exposure index (PEI) | 121.5K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-19T22:25:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.141a0b4bb3f6c6985606362eb91c6855 |
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: 2026-05-19T22:25:00.000Z.
First archived: 2026-05-19T22:27:35.567Z. 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 Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Hancock, OH; Wood, OH; Erie, OH; Ottawa, OH; Sandusky, OH; Wayne, IN; Darke, OH; Preble, OH and 4 more areas |
| Headline | Severe Thunderstorm Warning issued May 19 at 6:25PM EDT until May 19 at 6:45PM EDT by NWS Cleveland OH |
| Expires | 2026-05-19T18:45:00-04:00 |
| SenderName | NWS Cleveland OH |
| HasExactCoords | true |
| MergedCount | 7 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.141a0b4bb3f6c6985606362eb91c685554a5e477.001.1","noaa_urn:oid:2.49.0.1.840.0.0957a921efdc3bec8bc4956783a1658208bb0284.001.1","noaa_urn:oid:2.49.0.1.840.0.41d468bf888269c2bda791c7112dea33e0e6df20.001.1","noaa_urn:oid:2.49.0.1.840.0.030ac1580c314cd7216bf4f4f59f939190be7678.001.1","noaa_urn:oid:2.49.0.1.840.0.db023fda6e407a874a14a1e97958f26900ecd676.001.1","noaa_urn:oid:2.49.0.1.840.0.d555440da3525a4e4dadd1f45cefe4b9b42dbf55.001.1","noaa_urn:oid:2.49.0.1.840.0.65af4f510a4257086e38be40315296a67f4e7fde.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 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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