Right now
The most recent data we hold from NOAA arrived 5 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
Nothing else has been detected within 20 km in the last 24 hours.
This alert expired on 25 June 2026 at 02:00 UTC. It is kept here as a record.
It is the 3rd strongest of the 67 detections recorded within 20 km of this point since 10 March 2026. The last comparable one was on 11 June 2026. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 24 at 8:09PM CDT until June 24 at 9:00PM CDT by NWS Chicago IL
Urban PEI: 1,433,415 within a heuristic 50 km radius; not unique people.
Nearby, since 10 March 2026
- August 12, 2026 · score 52 · 6.2 km
- June 25, 2026 · score 52 · 7.3 km
- June 10, 2026 · score 46 · 7.5 km
How we know
6 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 52 out of 100.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
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) | 52 / 100 |
| Legacy data-support index | 0.88/1 |
| Coordinates | 41.3358, -87.9513 |
| Nearest City | New Lenox (19 km) |
| Urban exposure index (PEI) | 1.4M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-25T01:09:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.5b8b3a5f1aa02f26edfadc804844f0f7 |
Physical priority index · v1. Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: noaa. Occurrence: 2026-06-25T01:09:00.000Z.
First archived: 2026-06-25T01:16:32.765Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Lake, IN; Livingston, IL |
| Headline | Severe Thunderstorm Warning issued June 24 at 8:09PM CDT until June 24 at 9:00PM CDT by NWS Chicago IL |
| Expires | 2026-06-24T21:00:00-05:00 |
| SenderName | NWS Chicago IL |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.5b8b3a5f1aa02f26edfadc804844f0f724b46859.001.1","noaa_urn:oid:2.49.0.1.840.0.ed678767e64629fd16e20dc693f8d5ed993c09bb.001.1"] |
| Iem TypeSummary | G |
| Iem Magnitude | 58 |
| Iem Unit | MPH |
| Iem City | 1 S Hanover Park |
| Iem County | DuPage |
| Iem State | IL |
| Iem Wfo | LOT |
| Iem Remark | Private weather station KILHANOVI2 measured a wind gust to 58 mph. |
| MergedSources | [{"id":"iem_E_41.930_-87.990_1782346200000","source":"iem","severity":"low","severityValue":25,"timestamp":1782346200000,"latitude":41.93,"longitude":-87.99},{"id":"iem_D_41.980_-88.140_1782344400000","source":"iem","severity":"low","severityValue":25,"timestamp":1782344400000,"latitude":41.98,"longitude":-88.14},{"id":"iem_E_41.930_-87.840_1782347100000","source":"iem","severity":"low","severityValue":25,"timestamp":1782347100000,"latitude":41.93,"longitude":-87.84},{"id":"iem_G_41.210_-88.780_1782346500000","source":"iem","severity":"low","severityValue":25,"timestamp":1782346500000,"latitude":41.21,"longitude":-88.78},{"id":"iem_G_41.980_-88.150_1782344340000","source":"iem","severity":"low","severityValue":25,"timestamp":1782344340000,"latitude":41.98,"longitude":-88.15}] |
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.
Review the area, threshold and delivery channel in your account.
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