Timing

April 12, 2026 9:29 PM EDT
April 12, 2026 9:29 PM EDT
April 12, 2026 9:29 PM EDT
April 13, 2026 3:45 AM EDT

NWS Headline

FLASH FLOOD WARNING FOR A DAM FLOODGATE RELEASE REMAINS IN EFFECT UNTIL 345 AM EDT MONDAY FOR WESTERN ALCONA AND EAST CENTRAL OSCODA COUNTIES

Description

At 929 PM EDT, Dam operators reported high flows are being released

through Mio Dam. This may result in flash flooding downstream on the

Au Sable River.


HAZARD...Flash flooding from a dam high flow release.


SOURCE...Dam operator.


IMPACT...Flooding of areas along the river immediately downstream

of the dam.


The nearest downstream town is McKinley...located about 9.5 miles

from the dam. Areas downstream from the Mio Dam along the Au Sable

River should be prepared for flooding.


Flooding is occurring along the Au Sable River.

Instructions

If you are in low lying areas below the Mio Dam you should move to

higher ground immediately. Do not attempt to drive across flooded

roadways.

Affected Areas

Alcona, MI; Oscoda, MI

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