This alert expired on 15 March 2026 at 13:45 UTC. It is kept here as a record.
It is the 8th strongest of the 44 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 March 15 at 8:25AM CDT until March 15 at 8:45AM CDT by NWS Lincoln IL
An estimated 33,223 people live within 50 km of this point.
Nearby, since 15 March 2026
- June 20, 2026 · score 37 · 9.4 km
- March 15, 2026 · score 43 · 24.4 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 34 out of 100, at 84 % 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) | 34 / 100 |
| Our confidence | 84% |
| Coordinates | 40.2500, -89.9179 |
| Nearest City | Pekin (43 km) |
| Population Exposed | 33.2K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-03-15T13:25:00.000Z |
| Source | https://api.weather.gov/alerts/urn-oid-2_49_0_1_840_0_7aca8c9df542b4c2f9ebb4b8ce29e62a04717d84_002_1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Mason, IL |
| Headline | Severe Thunderstorm Warning issued March 15 at 8:25AM CDT until March 15 at 8:45AM CDT by NWS Lincoln IL |
| Expires | 2026-03-15T08:45:00-05:00 |
| SenderName | NWS Lincoln IL |
| HasExactCoords | true |
| Iem TypeSummary | H |
| Iem Magnitude | 0.88 |
| Iem Unit | Inch |
| Iem City | Beardstown |
| Iem County | Cass |
| Iem State | IL |
| Iem Wfo | ILX |
| Iem Remark | Video of hail on social media from public that estimated nickel sized hail. |
| MergedSources | [{"id":"iem_H_40.010_-90.430_1773579300000","source":"iem","severity":"low","severityValue":25,"timestamp":1773579300000,"latitude":40.01,"longitude":-90.43}] |
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 in this area?
Calamity.live data shows a weather event with CalamityScore 34/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.