Reported by SPC 170 days ago.
It is the 219th strongest of the 512 detections recorded within 20 km of this point since 15 March 2026. Another comparable one was recorded here earlier the same day. 43 more were recorded here in the fortnight before it.
What the source measured
SPC reported: Wind UNK kt near 2 SE Arthur, Douglas, IL. Roof blown off barn and tops of trees carried a couple hundred feet. Possible tornado. (ILX)
An estimated 240,970 people live within 50 km of this point.
Nearby, since 15 March 2026
- June 18, 2026 · score 49 · 4.3 km
- May 18, 2026 · score 43 · 9.8 km
- June 20, 2026 · score 43 · 10.1 km
How we know
Confirmed by 3 independent sources, including SPC.
Our own score for this event is 43 out of 100, at 95 % 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) | 43 / 100 |
| Our confidence | 95% |
| Coordinates | 39.7000, -88.4400 |
| Nearest City | Mattoon (25 km) |
| Population Exposed | 241.0K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-03-16T02:49:34.352Z |
| Source | https://www.spc.noaa.gov/climo/reports/today.html |
Score Breakdown
Technical Details
| ReportType | wind |
| Speed | UNK |
| Location | 2 SE Arthur |
| County | Douglas |
| State | IL |
| Comments | Roof blown off barn and tops of trees carried a couple hundred feet. Possible tornado. (ILX) |
| Iem TypeSummary | G |
| Iem Magnitude | 51 |
| Iem Unit | MPH |
| Iem City | Coles County Airport |
| Iem County | Coles |
| Iem State | IL |
| Iem Wfo | ILX |
| Iem Remark | ASOS station KMTO Coles Co. Mem AP. |
| MergedSources | [{"id":"iem_D_39.700_-88.440_1773619140000","source":"iem","severity":"low","severityValue":25,"timestamp":1773619140000,"latitude":39.7,"longitude":-88.44},{"id":"iem_G_39.470_-88.270_1773619500000","source":"iem","severity":"low","severityValue":25,"timestamp":1773619500000,"latitude":39.47,"longitude":-88.27}] |
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 Mattoon?
Calamity.live data shows a weather event with CalamityScore 43/100, near Mattoon (United States), based on data from spc. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.