This alert expired on 24 June 2026 at 23:45 UTC. It is kept here as a record.
It is the 3rd strongest of the 102 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. 4 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 24 at 6:13PM CDT until June 24 at 6:45PM CDT by NWS Quad Cities IA IL
An estimated 464,151 people live within 50 km of this point.
Nearby, since 16 March 2026
- June 10, 2026 · score 43 · 2.0 km
- May 17, 2026 · score 67 · 13.6 km
- July 2, 2026 · score 43 · 13.8 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 43 out of 100, at 78 % 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) | 43 / 100 |
| Our confidence | 78% |
| Coordinates | 43.1001, -89.1573 |
| Nearest City | Sun Prairie (10 km) |
| Population Exposed | 464.2K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-24T23:13:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.39a020df65347e2b1c735929028a84b4 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Whiteside, IL; De Kalb, IL; Kane, IL; McHenry, IL; Green, WI; Lafayette, WI and 11 more areas |
| Headline | Severe Thunderstorm Warning issued June 24 at 6:13PM CDT until June 24 at 6:45PM CDT by NWS Quad Cities IA IL |
| Expires | 2026-06-24T18:45:00-05:00 |
| SenderName | NWS Quad Cities IA IL |
| HasExactCoords | true |
| MergedCount | 15 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.39a020df65347e2b1c735929028a84b4df9cf770.001.1","noaa_urn:oid:2.49.0.1.840.0.bc7644f1f840dc488917427af1ca76bfe39a0c3f.001.1","noaa_urn:oid:2.49.0.1.840.0.6891d27da0af97a404c7365eee2b1867665fddc1.001.1","noaa_urn:oid:2.49.0.1.840.0.4934794661528234de8a100b11ba5b22ac3511f2.001.1","noaa_urn:oid:2.49.0.1.840.0.4cf2891efd97fe33e83b84112436a2364863dcad.001.1","noaa_urn:oid:2.49.0.1.840.0.19fad73ed6df23e22d7acad01bdbf287b0fd163e.001.1","noaa_urn:oid:2.49.0.1.840.0.01af8db5507cbc0118986cb971d65adae07a54a7.001.1","noaa_urn:oid:2.49.0.1.840.0.51c38f6bb50130a7af6f568bbf8cf074f70315ca.001.1","noaa_urn:oid:2.49.0.1.840.0.0cca2ed0268a10fd280c45f18c57a7f8a485683f.001.1","noaa_urn:oid:2.49.0.1.840.0.56d0270c36a2ba47684e9bed60c193f5bbac9c47.002.1","noaa_urn:oid:2.49.0.1.840.0.b2ca0b6e2213a8b3c58e68c0e6e088b5d751bd91.002.1","noaa_urn:oid:2.49.0.1.840.0.857c2d874d7315b425a2550007f947422d4fff67.001.1","noaa_urn:oid:2.49.0.1.840.0.f829ef758a25bc92d533355a8a3bd1236c34c191.001.1","noaa_urn:oid:2.49.0.1.840.0.37c3f417592bd8e39013ecb79372e369236ba0bd.002.1","noaa_urn:oid:2.49.0.1.840.0.c3a18f044705e30954ab959d006407e414b42e15.001.1"] |
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.
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.
Want to know when something happens near Sun Prairie?
Calamity.live data shows a weather event with CalamityScore 43/100, near Sun Prairie (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.