Special Marine Warning Issued for Central and Southern Green Bay
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NWS Green Bay has issued a Special Marine Warning for central and southern Green Bay until 10:45 AM CDT due to strong thunderstorms with wind gusts to 50 knots.
What this NWS weather alert tells you, and what most readers miss
This notice was issued by NOAA on July 3, 2026 and geographically references Green Bay, Wisconsin. Its severity classification of "high" signals how the issuing agency weighs the risk of harm if no action is taken - "critical" and "high" tier alerts typically carry direct consumer actions, while "medium" and "low" tend toward informational guidance or monitoring advisories. The category it belongs to - Weather Alerts - determines the warning protocol behind it, which shapes what protective action (seeking shelter, following evacuation orders if issued, monitoring official updates) is recommended and which agency holds authority to issue or cancel it.
Most readers skim a notice like this, check whether they are personally affected, and move on. The more useful lens is to read it as a data point about the issuing system: how quickly NOAA detected the hazard, how precise the geographic or product-identifier scope is, and whether similar notices have clustered in the same category or region in the last 90 days. Cluster patterns frequently precede a broader regulatory action, a single localized NWS weather alert is isolated; three of them within a quarter often indicate a supply-chain, infrastructure, or seasonal driver that will keep producing notices until something structural changes.
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Alert Details
A Special Marine Warning was issued by the National Weather Service in Green Bay WI. The alert is effective from 9:32 AM CDT on June 10, 2026, until 10:45 AM CDT on June 10, 2026.
Affected Areas
Central and Southern Bay of Green Bay, including areas south of a line from Cedar River to Rock Island Passage and north of a line from Oconto WI to Little Sturgeon Bay WI. Locations impacted include Green Bay, Oconto, Green Bay Harbor Entrance Light, Peshtigo Reef Light, Chambers Island, and Sister Bay.
What You Should Do
Move to safe harbor until hazardous weather passes.
Expected Conditions
Strong thunderstorms were located along a line from 19 NM north of Crivitz to 17 NM southeast of Shawano, moving east at 25 knots. Hazard includes wind gusts to nearly 50 knots. Small craft could be damaged in briefly higher winds and suddenly higher waves.
Timeline
The warning is in effect from 9:32 AM CDT until 10:45 AM CDT on June 10, 2026. The strong thunderstorm will be near Green Bay around 9:55 AM CDT, Oconto around 10:00 AM CDT, Green Bay Harbor Entrance Light around 10:10 AM CDT, Peshtigo Reef Light around 10:20 AM CDT, and Chambers Island around 10:25 AM CDT.
Original source: NOAA Official Notice ↗
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