Right now
The most recent data we hold from NOAA arrived 10 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 27 July 2026 at 18:15 UTC. It is kept here as a record.
It is the 9th strongest of the 38 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. 5 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 27 at 12:33PM CDT until July 27 at 1:15PM CDT by NWS Milwaukee/Sullivan WI
Urban PEI: 1,414,238 within a heuristic 50 km radius; not unique people.
Nearby, since 16 March 2026
- July 3, 2026 · score 46 · 6.7 km
- July 27, 2026 · score 46 · 8.4 km
- August 9, 2026 · score 52 · 10.9 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 46 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) | 46 / 100 |
| Legacy data-support index | 0.81/1 |
| Coordinates | 42.6867, -87.7353 |
| Nearest City | Racine (6 km) |
| Urban exposure index (PEI) | 1.4M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-27T17:33:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.9f22edf96628e9bbf401a02e5610f8e8 |
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: 2026-07-27T17:33:00.000Z.
First archived: 2026-07-27T17:35:56.816Z. 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 | Kenosha, WI; Calumet, WI; Manitowoc, WI; Winnebago, WI; Mason, MI; Muskegon, MI; Oceana, MI and 5 more areas |
| Headline | Severe Thunderstorm Warning issued July 27 at 12:33PM CDT until July 27 at 1:15PM CDT by NWS Milwaukee/Sullivan WI |
| Expires | 2026-07-27T13:15:00-05:00 |
| SenderName | NWS Milwaukee/Sullivan WI |
| HasExactCoords | true |
| MergedCount | 8 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.9f22edf96628e9bbf401a02e5610f8e8e0604367.001.1","noaa_urn:oid:2.49.0.1.840.0.2180003388fd3f0d4b79075e841a9f5a72b35dec.001.1","noaa_urn:oid:2.49.0.1.840.0.27a606eacce51a111aaf6616678d4be1f2ac90f4.001.1","noaa_urn:oid:2.49.0.1.840.0.76ebdf4de8c7145f5575f906686947e8e91fc20f.001.1","noaa_urn:oid:2.49.0.1.840.0.2eae6d09714e0f611c1784cc0f34b6f7dc5e00f2.001.1","noaa_urn:oid:2.49.0.1.840.0.03322455fee27e497af19c290bdaf3d0e5718280.001.1","noaa_urn:oid:2.49.0.1.840.0.872f8e875b0411f499e7c1153ab4c2bf4c17ed93.001.1","noaa_urn:oid:2.49.0.1.840.0.5f91998e0248bc0843c817c0b089e2b45f1a7858.001.1"] |
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 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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