Right now
The most recent data we hold from NOAA arrived 4 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 15:00 UTC. It is kept here as a record.
No stronger detection stands among the 46 recorded within 20 km of this point since 15 March 2026 — 10 others scored the same. Another comparable one was recorded here earlier the same day. 15 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued July 1 at 8:56AM CDT until July 1 at 10:00AM CDT by NWS Green Bay WI
An estimated 181,674 people live within 50 km of this point.
Nearby, since 15 March 2026
- June 30, 2026 · score 43 · 9.2 km
- July 27, 2026 · score 22 · 11.8 km
- June 30, 2026 · score 43 · 14.7 km
How we know
Confirmed by 4 independent sources, including NOAA.
Our own score for this event is 43 out of 100, at 91 % 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 | 91% |
| Coordinates | 44.7238, -87.5854 |
| Nearest City | Green Bay (41 km) |
| Population Exposed | 181.7K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-01T13:56:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.8fc49973a4c9309cf74553b0f92d431a |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Green Bay south of line from Cedar River to Rock Island Passage and north of a line from Oconto WI to Little Sturgeon Bay WI; Green Bay south of line from Oconto WI to Little Sturgeon Bay WI; Rock Island Passage to Sturgeon Bay WI; Sturgeon Bay to Two Rivers WI; Two Rivers to Sheboygan WI; Lake Michigan from Rock Island Passage to Sturgeon Bay WI 5NM offshore to mid lake; Lake Michigan from Sturgeon Bay to Two Rivers WI 5NM offshore to Mid Lake; Lake Michigan from Two Rivers to Sheboygan WI 5NM offshore to Mid Lake |
| Headline | Special Marine Warning issued July 1 at 8:56AM CDT until July 1 at 10:00AM CDT by NWS Green Bay WI |
| Expires | 2026-07-01T10:00:00-05:00 |
| SenderName | NWS Green Bay WI |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.8fc49973a4c9309cf74553b0f92d431aec828b18.001.1","noaa_urn:oid:2.49.0.1.840.0.a89f381df732d61537ee20b725a36b87e5bb737a.001.1","noaa_urn:oid:2.49.0.1.840.0.ec15990a5ebdf98983c52e2bd2fdf19136e1e5c6.001.1"] |
| Iem TypeSummary | D |
| Iem City | 3 SE De Pere |
| Iem County | Brown |
| Iem State | WI |
| Iem Wfo | GRB |
| Iem Remark | Trees and powerlines down. |
| MergedSources | [{"id":"iem_D_44.510_-88.000_1782911940000","source":"iem","severity":"low","severityValue":25,"timestamp":1782911940000,"latitude":44.51,"longitude":-88},{"id":"iem_D_44.510_-88.000_1782912600000","source":"iem","severity":"low","severityValue":25,"timestamp":1782912600000,"latitude":44.51,"longitude":-88},{"id":"iem_D_44.420_-88.010_1782911640000","source":"iem","severity":"low","severityValue":25,"timestamp":1782911640000,"latitude":44.42,"longitude":-88.01}] |
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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