This alert expired on 16 March 2026 at 06:00 UTC. It is kept here as a record.
It is the 67th strongest of the 551 detections recorded within 20 km of this point since 10 March 2026. Another comparable one was recorded here earlier the same day. 12 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Watch issued March 15 at 5:42PM CDT until March 16 at 1:00AM CDT by NWS Chicago IL
An estimated 450,012 people live within 50 km of this point.
Nearby, since 10 March 2026
- August 13, 2026 · score 43 · 0.0 km
- August 12, 2026 · score 43 · 0.0 km
- August 9, 2026 · score 43 · 0.0 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 43 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) | 43 / 100 |
| Our confidence | 84% |
| Coordinates | 40.6000, -89.4000 |
| Nearest City | Morton (5 km) |
| Population Exposed | 450.0K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-03-15T22:42:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Watch_noaa_urn:oid:2.49.0.1.840.0.daa4443fc86b9e5837b2ca318ef79516 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Watch |
| Urgency | Future |
| Certainty | Possible |
| AreaDesc | Ford, IL; Iroquois, IL; Kankakee, IL; Livingston, IL; Benton, IN; Jasper, IN; Lake, IN; Newton, IN; Porter, IN; Calumet Harbor IL to Gary IN; Gary to Burns Harbor IN; Burns Harbor to Michigan City IN |
| Headline | Severe Thunderstorm Watch issued March 15 at 5:42PM CDT until March 16 at 1:00AM CDT by NWS Chicago IL |
| Expires | 2026-03-16T01:00:00-05:00 |
| SenderName | NWS Chicago IL |
| HasExactCoords | false |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.daa4443fc86b9e5837b2ca318ef79516835fa596.001.1","noaa_urn:oid:2.49.0.1.840.0.daa4443fc86b9e5837b2ca318ef79516835fa596.002.1"] |
| Iem TypeSummary | N |
| Iem Magnitude | 46 |
| Iem Unit | MPH |
| Iem City | Central Illinois Airpor |
| Iem County | McLean |
| Iem State | IL |
| Iem Wfo | ILX |
| Iem Remark | AWOS station KBMI Bloomington Arpt. Sustained at 35 mph. |
| MergedSources | [{"id":"iem_N_40.480_-88.910_1773597360000","source":"iem","severity":"low","severityValue":25,"timestamp":1773597360000,"latitude":40.48,"longitude":-88.91}] |
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 Morton?
Calamity.live data shows a weather event with CalamityScore 43/100, near Morton (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.