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Lakeshore Flood Warning

Oswego; Jefferson

Jun 18, 2026 9:59 PM - Jun 19, 2026 6:00 AM

* WHAT...Minor lakeshore flooding expected. * WHERE...Lake Ontario shore of Oswego and Jefferson counties. Water rises are also possible along the upper Saint Lawrence River in the Thousand Islands region. * WHEN...Until 8 PM EDT Friday. * IMPACTS...The combination of high lake levels and significant wave action will result in minor lakeshore flooding along the immediate lakeshore, especially in bays, inlets, harbors, and other low lying areas along the shoreline. Shoreline erosion is also expected.

Affected Counties: Oswego; Jefferson

Data Source: National Weather Service Alerts

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