This alert expired on 10 June 2026 at 20:30 UTC. It is kept here as a record.
It is the 3rd strongest of the 104 detections recorded within 20 km of this point since 16 March 2026. The last comparable one was on 17 May 2026.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 10 at 3:01PM CDT until June 10 at 3:30PM CDT by NWS Milwaukee/Sullivan WI
An estimated 464,151 people live within 50 km of this point.
Nearby, since 16 March 2026
- June 24, 2026 · score 43 · 2.0 km
- May 17, 2026 · score 67 · 12.1 km
- July 2, 2026 · score 43 · 15.0 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 80 % 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 | 80% |
| Coordinates | 43.1087, -89.1793 |
| Nearest City | Sun Prairie (8 km) |
| Population Exposed | 464.2K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-10T20:01:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.a64508771efbb950baf77f6693fa82be |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Columbia, WI; Dodge, WI; Fond du Lac, WI; Green Lake, WI; Marquette, WI; Washington, WI; Boone, IL; De Kalb, IL; McHenry, IL; Marathon, WI; Wood, WI and 12 more areas |
| Headline | Severe Thunderstorm Warning issued June 10 at 3:01PM CDT until June 10 at 3:30PM CDT by NWS Milwaukee/Sullivan WI |
| Expires | 2026-06-10T15:30:00-05:00 |
| SenderName | NWS Milwaukee/Sullivan WI |
| HasExactCoords | true |
| MergedCount | 15 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.a64508771efbb950baf77f6693fa82bee3c5e54c.002.1","noaa_urn:oid:2.49.0.1.840.0.f2eddacaeec8b1b76a600ac5965f752ff46cd25b.001.1","noaa_urn:oid:2.49.0.1.840.0.40199154494afc8292005e2dc1ad2db380b2f28a.001.1","noaa_urn:oid:2.49.0.1.840.0.b3966a8878598b3269cb3e6c1c240be0e7d3a00f.001.1","noaa_urn:oid:2.49.0.1.840.0.6ba01552dea7f2ff54c4caff52fdf418916fb073.001.1","noaa_urn:oid:2.49.0.1.840.0.55b37acfd7a4ece53ab6c57bfcaabf707b90a6b2.001.1","noaa_urn:oid:2.49.0.1.840.0.668427a8607a2739b9c1208745d5729801cdc34d.001.1","noaa_urn:oid:2.49.0.1.840.0.636282eda2a7180872febe71f7d767d077efb877.002.1","noaa_urn:oid:2.49.0.1.840.0.a7f528562532dbc10bdb30581c769b8230013440.001.1","noaa_urn:oid:2.49.0.1.840.0.719495088e321a23cf5e22ab562325a297bc7eec.001.1","noaa_urn:oid:2.49.0.1.840.0.ac87df99546c62ba38e3a8dc093858dbfb2bc2a8.001.1","noaa_urn:oid:2.49.0.1.840.0.ec3d9cb7c1c16a25ac360cbdc19defb4831fcbcc.001.1","noaa_urn:oid:2.49.0.1.840.0.b7161f3c87185073684b1c5f22c2ff8a05231f6f.001.1","noaa_urn:oid:2.49.0.1.840.0.52c5914dc04fdb415adb390c14c49e539a48136e.001.1","noaa_urn:oid:2.49.0.1.840.0.7a2d5da1db840dba3cecffb99eb187497b6405ad.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.