This alert expired on 4 July 2026 at 02:15 UTC. It is kept here as a record.
No stronger detection stands among the 103 recorded within 20 km of this point since 31 March 2026 — 20 others scored the same. Another comparable one was recorded here earlier the same day. 32 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 3 at 8:58PM CDT until July 3 at 9:15PM CDT by NWS Chicago IL
An estimated 2,244,583 people live within 50 km of this point.
Nearby, since 31 March 2026
- July 3, 2026 · score 52 · 9.5 km
- July 3, 2026 · score 46 · 9.6 km
- July 4, 2026 · score 52 · 11.6 km
How we know
Confirmed by 4 independent sources, including NOAA.
Our own score for this event is 52 out of 100, at 91 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | medium |
| Calamity Score (ours) | 52 / 100 |
| Our confidence | 91% |
| Coordinates | 41.8340, -88.5060 |
| Nearest City | Wasco (15 km) |
| Population Exposed | 2.2M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-04T01:58:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.50242330e15eedd3de2b2b6e3c787882 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | De Kalb, IL; Kane, IL; De Kalb, IL; Kane, IL; Kendall, IL |
| Headline | Severe Thunderstorm Warning issued July 3 at 8:58PM CDT until July 3 at 9:15PM CDT by NWS Chicago IL |
| Expires | 2026-07-03T21:15:00-05:00 |
| SenderName | NWS Chicago IL |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.50242330e15eedd3de2b2b6e3c787882c84a4658.001.1","noaa_urn:oid:2.49.0.1.840.0.19fe2dabc45f10cd6740fa0fae61da2ffb8c1412.001.1"] |
| Iem TypeSummary | E |
| Iem City | 1 N Lisle |
| Iem County | DuPage |
| Iem State | IL |
| Iem Wfo | LOT |
| Iem Remark | Water is covering Route 53 at Ironwood Drive. Minor wetland flooding also noted along the DuPage River nearby, as well. |
| Google News RssFeed | weather |
| Google News SourceName | CBS News |
| MergedSources | [{"id":"iem_G_41.890_-89.080_1783122900000","source":"iem","severity":"low","severityValue":25,"timestamp":1783122900000,"latitude":41.89,"longitude":-89.08},{"id":"iem_E_41.820_-88.070_1783108800000","source":"iem","severity":"low","severityValue":25,"timestamp":1783108800000,"latitude":41.82,"longitude":-88.07},{"id":"gnews_weather_495314_207","source":"google_news","severity":"medium","severityValue":40,"timestamp":1783130566000,"latitude":41.85,"longitude":-87.65}] |
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 10 February 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.
Calamity.live data shows a weather event with CalamityScore 52/100, near Wasco (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.