Severe Thunderstorm Watch issued July 3 at 6:38PM CDT until July 4 at 2:00AM CDT by NWS Chicago IL
Geographic Context
This weather event occurred near Morton (approximately 5 km away) in United States, an area that experiences a range of natural hazards. An estimated 450.0K people live within 50 km of the event location, placing this in the "significant" population impact tier.
Event Assessment
This event is a weather event classified as medium severity. Calamity.live has classified it as "medium" severity with a severity value of 50. The computed Calamity Score is 43 out of 100, reflecting a moderate-impact event. The primary scoring components are: historical (80), population (70), intensity (35). Data for this event was sourced from noaa, one of the 196 scientific monitoring sources aggregated by Calamity.live.
Regional Monitoring Context
United States has a documented history of weather events. Monitoring for weather events in the region relies on a combination of ground-based sensors, satellite remote sensing, and official reporting from national agencies. The frequency and severity of such events are tracked over time to support risk assessment and emergency preparedness.
Event Data
| Type | Weather |
| Severity | medium |
| Severity Value | 50 |
| Calamity Score | 43 / 100 |
| Confidence | 80% |
| Coordinates | 40.6000, -89.4000 |
| Nearest City | Morton (5 km) |
| Population Exposed | 450.0K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-03T23:38:00.000Z |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Watch |
| Urgency | Future |
| Certainty | Possible |
| AreaDesc | Winthrop Harbor to Wilmette Harbor IL; Wilmette Harbor to Northerly Island IL; Northerly Island to Calumet Harbor IL; Calumet Harbor IL to Gary IN; Gary to Burns Harbor IN; Burns Harbor to Michigan City IN; Lake Michigan from Winthrop Harbor to Wilmette Harbor IL 5NM offshore to Mid Lake; Lake Michigan from Wilmette Harbor to Michigan City in 5NM offshore to Mid Lake; Boone, IL; Cook, IL; De Kalb, IL; DuPage, IL; Ford, IL; Grundy, IL; Iroquois, IL; Kane, IL; Kankakee, IL; Kendall, IL; Lake, IL; La Salle, IL; Lee, IL; Livingston, IL; McHenry, IL; Ogle, IL; Will, IL; Winnebago, IL; Benton, IN; Jasper, IN; Lake, IN; Newton, IN; Porter, IN; Cedar, IA; Clinton, IA; Jackson, IA; Johnson, IA; Louisa, IA; Muscatine, IA; Scott, IA; Washington, IA; Bureau, IL; Carroll, IL; Henry, IL; Jo Daviess, IL; Mercer, IL; Putnam, IL; Rock Island, IL; Stephenson, IL; Whiteside, IL and 1 more areas |
| Headline | Severe Thunderstorm Watch issued July 3 at 6:38PM CDT until July 4 at 2:00AM CDT by NWS Chicago IL |
| Expires | 2026-07-04T02:00:00-05:00 |
| SenderName | NWS Chicago IL |
| HasExactCoords | false |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.5db69d57f9c4bee8ef88c34d3a4e7d5f4f5153fd.002.1","noaa_urn:oid:2.49.0.1.840.0.5db69d57f9c4bee8ef88c34d3a4e7d5f4f5153fd.001.1","noaa_urn:oid:2.49.0.1.840.0.55fa463375c2eef33e970c1d81ef169ac6cd8fc4.001.1","noaa_urn:oid:2.49.0.1.840.0.803d79a8c632e502d589948faa28edec6a249022.001.1"] |
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.
This data is aggregated algorithmically from scientific sources. Not a replacement for official emergency warnings.
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 196 scientific monitoring sources.