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 28 May 2026 at 02:00 UTC. It is kept here as a record.
No stronger detection stands among the 38 recorded within 20 km of this point since 16 March 2026 — 6 others scored the same. Another comparable one was recorded here earlier the same day. 3 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 27 at 8:26PM CDT until May 27 at 9:00PM CDT by NWS Milwaukee/Sullivan WI
An estimated 359,645 people live within 50 km of this point.
Nearby, since 16 March 2026
- May 28, 2026 · score 43 · 3.4 km
- June 24, 2026 · score 43 · 10.6 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 43 out of 100, at 86 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
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) | 43 / 100 |
| Our confidence | 86% |
| Coordinates | 43.2560, -89.7620 |
| Nearest City | Middleton (27 km) |
| Population Exposed | 359.6K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-28T01:26:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.04b26f51483549b7bb1e029afd2c82685851be5c.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Columbia, WI; Dane, WI; Iowa, WI; Sauk, WI |
| Headline | Severe Thunderstorm Warning issued May 27 at 8:26PM CDT until May 27 at 9:00PM CDT by NWS Milwaukee/Sullivan WI |
| Expires | 2026-05-27T21:00:00-05:00 |
| SenderName | NWS Milwaukee/Sullivan WI |
| HasExactCoords | true |
| Iem TypeSummary | H |
| Iem Magnitude | 1 |
| Iem Unit | Inch |
| Iem City | 1 W Oxford |
| Iem County | Marquette |
| Iem State | WI |
| Iem Wfo | MKX |
| MergedSources | [{"id":"iem_H_43.780_-89.570_1779927360000","source":"iem","severity":"low","severityValue":25,"timestamp":1779927360000,"latitude":43.78,"longitude":-89.57}] |
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.
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