Right now
The most recent data we hold from NOAA arrived 7 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 00:30 UTC. It is kept here as a record.
It is the 6th strongest of the 32 detections recorded within 20 km of this point since 15 March 2026. Another comparable one was recorded here earlier the same day. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 19 at 8:13PM EDT until May 19 at 8:30PM EDT by NWS Wilmington OH
An estimated 528,347 people live within 50 km of this point.
Nearby, since 15 March 2026
- May 19, 2026 · score 48 · 12.4 km
- August 11, 2026 · score 67 · 18.9 km
- May 20, 2026 · score 52 · 20.9 km
How we know
Confirmed by 3 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 | 39.8538, -83.7787 |
| Nearest City | Springfield (8 km) |
| Population Exposed | 528.3K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-20T00:13:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.fd0704daa29ab9421fed63fda64e9e92 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Champaign, OH; Delaware, OH; Franklin, OH; Madison, OH; Union, OH; Clark, OH; Clinton, OH; Fayette, OH; Greene, OH; Madison, OH; Butler, OH; Greene, OH; Montgomery, OH; Warren, OH |
| Headline | Severe Thunderstorm Warning issued May 19 at 8:13PM EDT until May 19 at 8:30PM EDT by NWS Wilmington OH |
| Expires | 2026-05-19T20:30:00-04:00 |
| SenderName | NWS Wilmington OH |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.fd0704daa29ab9421fed63fda64e9e9202391380.001.1","noaa_urn:oid:2.49.0.1.840.0.0fa1847efecea56ffcca0eeb3c97cb327b51b8c7.001.1","noaa_urn:oid:2.49.0.1.840.0.0a240e1e93612e1b32e9283514d9edea4fa8dd0e.002.1"] |
| Iem TypeSummary | D |
| Iem City | 4 ENE Wayne Lakes |
| Iem County | Darke |
| Iem State | OH |
| Iem Wfo | ILN |
| Iem Remark | Metal roof damage. Photos posted. Time estimated by RADAR. |
| MergedSources | [{"id":"iem_D_40.170_-84.270_1779231420000","source":"iem","severity":"low","severityValue":25,"timestamp":1779231420000,"latitude":40.17,"longitude":-84.27},{"id":"iem_D_40.050_-84.600_1779229920000","source":"iem","severity":"low","severityValue":25,"timestamp":1779229920000,"latitude":40.05,"longitude":-84.6}] |
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.
Want to know when something happens near Springfield?
Calamity.live data shows a weather event with CalamityScore 48/100, near Springfield (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.