Right now
The most recent data we hold from NOAA arrived 28 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 20 May 2026 at 02:00 UTC. It is kept here as a record.
It is the 2nd strongest of the 61 detections recorded within 20 km of this point since 23 March 2026. The last comparable one was on 19 April 2026.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 19 at 9:10PM EDT until May 19 at 10:00PM EDT by NWS Wilmington OH
An estimated 1,317,785 people live within 50 km of this point.
Nearby, since 23 March 2026
- August 11, 2026 · score 52 · 1.8 km
- May 20, 2026 · score 52 · 2.9 km
- August 16, 2026 · score 52 · 5.1 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 52 out of 100, at 86 % 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) | 52 / 100 |
| Our confidence | 86% |
| Coordinates | 39.8614, -82.7000 |
| Nearest City | Pickerington (5 km) |
| Population Exposed | 1.3M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-20T01:10:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.17a195c333a58b35799a46589f5002ba0f97b7ee.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Fairfield, OH; Franklin, OH; Licking, OH; Pickaway, OH |
| Headline | Severe Thunderstorm Warning issued May 19 at 9:10PM EDT until May 19 at 10:00PM EDT by NWS Wilmington OH |
| Expires | 2026-05-19T22:00:00-04:00 |
| SenderName | NWS Wilmington OH |
| HasExactCoords | true |
| Iem TypeSummary | D |
| Iem City | Choctaw Lake |
| Iem County | Madison |
| Iem State | OH |
| Iem Wfo | ILN |
| Iem Remark | Tree limbs down and minor shed damage. Time estimated from RADAR. |
| MergedSources | [{"id":"iem_D_39.960_-83.490_1779237900000","source":"iem","severity":"low","severityValue":25,"timestamp":1779237900000,"latitude":39.96,"longitude":-83.49}] |
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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