Right now
The most recent data we hold from NOAA arrived 5 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 23:45 UTC. It is kept here as a record.
It is the 4th strongest of the 217 detections recorded within 20 km of this point since 12 March 2026. Another comparable one was recorded here earlier the same day. 3 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 19 at 7:14PM EDT until May 19 at 7:45PM EDT by NWS Wilmington OH
Urban PEI: 694,691 within a heuristic 50 km radius; not unique people.
Nearby, since 12 March 2026
- August 2, 2026 · score 72 · 6.6 km
- September 4, 2026 · score 41 · 7.0 km
- August 8, 2026 · score 48 · 10.2 km
How we know
3 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 48 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) | 48 / 100 |
| Legacy data-support index | 0.90/1 |
| Coordinates | 39.8471, -84.3643 |
| Nearest City | Trotwood (7 km) |
| Urban exposure index (PEI) | 694.7K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-19T23:14:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.8253fdc5b1e30e71aba703806a0baf90 |
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: 2026-05-19T23:14:00.000Z.
First archived: 2026-05-19T23:19:19.328Z. 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 | Champaign, OH; Clark, OH; Logan, OH; Miami, OH; Shelby, OH; Franklin, IN; Union, IN; Butler, OH; Preble, OH |
| Headline | Severe Thunderstorm Warning issued May 19 at 7:14PM EDT until May 19 at 7:45PM EDT by NWS Wilmington OH |
| Expires | 2026-05-19T19:45:00-04:00 |
| SenderName | NWS Wilmington OH |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.8253fdc5b1e30e71aba703806a0baf9021895ed7.001.1","noaa_urn:oid:2.49.0.1.840.0.295983cd8bf66b30c71b8d8b7032df198ec9fb5c.001.1"] |
| Iem TypeSummary | D |
| Iem City | Centerville |
| Iem County | Wayne |
| Iem State | IN |
| Iem Wfo | ILN |
| Iem Remark | Trees down in Centerville. Time estimated from RADAR. |
| MergedSources | [{"id":"iem_D_39.830_-84.890_1779228420000","source":"iem","severity":"low","severityValue":25,"timestamp":1779228420000,"latitude":39.83,"longitude":-84.89},{"id":"iem_D_39.820_-85.000_1779228120000","source":"iem","severity":"low","severityValue":25,"timestamp":1779228120000,"latitude":39.82,"longitude":-85}] |
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.
Want to know when something happens near Trotwood?