Right now
The most recent data we hold from NOAA arrived 6 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 23:50 UTC. It is kept here as a record.
It is the 16th strongest of the 87 detections recorded within 20 km of this point since 28 April 2026. Another comparable one was recorded here earlier the same day. 4 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 19 at 7:40PM EDT until May 19 at 7:45PM EDT by NWS Wilmington OH
An estimated 879,627 people live within 50 km of this point.
Nearby, since 28 April 2026
- May 28, 2026 · score 52 · 3.4 km
- August 2, 2026 · score 72 · 4.9 km
- May 27, 2026 · score 48 · 7.8 km
How we know
Confirmed by 5 independent sources, including NOAA.
Our own score for this event is 48 out of 100, at 90 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
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 |
| Our confidence | 90% |
| Coordinates | 39.4068, -84.5547 |
| Nearest City | Hamilton (1 km) |
| Population Exposed | 879.6K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-19T23:40:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.13d31098a7f437477710a7f3657643d9 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Champaign, OH; Clark, OH; Logan, OH; Miami, OH; Butler, OH; Greene, OH; Montgomery, OH; Preble, OH; Warren, OH; Franklin, IN; Union, IN; Butler, OH; Preble, OH and 1 more areas |
| Headline | Severe Thunderstorm Warning issued May 19 at 7:40PM EDT until May 19 at 7:45PM EDT by NWS Wilmington OH |
| Expires | 2026-05-19T19:50:00-04:00 |
| SenderName | NWS Wilmington OH |
| HasExactCoords | true |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.13d31098a7f437477710a7f3657643d9ba15bd57.001.1","noaa_urn:oid:2.49.0.1.840.0.9c10d8067f98c89f484313a501eecff55e7a465c.001.1","noaa_urn:oid:2.49.0.1.840.0.8c86cf73fd85de42f38508275a5af7c864649259.001.1","noaa_urn:oid:2.49.0.1.840.0.163704d6aadb3e176df376d6087b2c6bc9733e1b.001.1"] |
| Iem TypeSummary | H |
| Iem Magnitude | 1 |
| Iem Unit | Inch |
| Iem City | Centerville |
| Iem County | Wayne |
| Iem State | IN |
| Iem Wfo | ILN |
| Iem Remark | Photo posted on social media. |
| 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},{"id":"iem_D_39.990_-84.720_1779229380000","source":"iem","severity":"low","severityValue":25,"timestamp":1779229380000,"latitude":39.99,"longitude":-84.72},{"id":"iem_H_39.820_-85.000_1779228300000","source":"iem","severity":"low","severityValue":25,"timestamp":1779228300000,"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.
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