Right now
The most recent data we hold from NOAA arrived 2 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 1 July 2026 at 19:30 UTC. It is kept here as a record.
No stronger detection stands among the 13 recorded within 20 km of this point since 17 May 2026 — 4 others scored the same. Another comparable one was recorded here earlier the same day. One more was recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued July 1 at 1:50PM CDT until July 1 at 2:30PM CDT by NWS Milwaukee/Sullivan WI
Urban PEI: 81,807 within a heuristic 50 km radius; not unique people.
Nearby, since 17 May 2026
- June 6, 2026 · score 32 · 16.0 km
How we know
7 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 39 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) | 39 / 100 |
| Legacy data-support index | 0.90/1 |
| Coordinates | 43.7840, -87.2980 |
| Nearest City | Sheboygan (33 km) |
| Urban exposure index (PEI) | 81.8K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-01T18:50:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.216de5bf70e633bc0e6145fe095cf99b6e0b532b.002.1 |
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: 2026-07-01T18:50:00.000Z.
First archived: 2026-07-01T19:06:58.262Z. 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 | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Lake Michigan from Sheboygan to Port Washington WI 5NM offshore to Mid Lake |
| Headline | Special Marine Warning issued July 1 at 1:50PM CDT until July 1 at 2:30PM CDT by NWS Milwaukee/Sullivan WI |
| Expires | 2026-07-01T14:30:00-05:00 |
| SenderName | NWS Milwaukee/Sullivan WI |
| HasExactCoords | true |
| Iem TypeSummary | H |
| Iem Magnitude | 2.25 |
| Iem Unit | Inch |
| Iem City | Plymouth |
| Iem County | Sheboygan |
| Iem State | WI |
| Iem Wfo | MKX |
| Iem Remark | Time est from radar. |
| MergedSources | [{"id":"iem_H_43.770_-87.750_1782930000000","source":"iem","severity":"low","severityValue":25,"timestamp":1782930000000,"latitude":43.77,"longitude":-87.75},{"id":"iem_H_43.750_-87.900_1782929100000","source":"iem","severity":"low","severityValue":25,"timestamp":1782929100000,"latitude":43.75,"longitude":-87.9},{"id":"iem_H_43.830_-88.020_1782915300000","source":"iem","severity":"low","severityValue":25,"timestamp":1782915300000,"latitude":43.83,"longitude":-88.02},{"id":"iem_H_43.740_-87.970_1782929100000","source":"iem","severity":"low","severityValue":25,"timestamp":1782929100000,"latitude":43.74,"longitude":-87.97},{"id":"iem_H_43.750_-87.940_1782928800000","source":"iem","severity":"low","severityValue":25,"timestamp":1782928800000,"latitude":43.75,"longitude":-87.94},{"id":"iem_H_43.750_-87.980_1782928800000","source":"iem","severity":"low","severityValue":25,"timestamp":1782928800000,"latitude":43.75,"longitude":-87.98}] |
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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