Snow Squalls May Impact New Year's Eve Travel from the Great Lakes to the Mid-Atlantic; Heavy Rain Returns to California

Lake effect snow will continue through Friday bringing significant snowfall to areas east to southeast of the Great Lakes. Snow squalls may impact New Year's Eve travel this evening and overnight across parts of the Great Lakes, Ohio Valley, Mid-Atlantic, and Upstate New York. Heavy rain will bring another flash flooding threat for southern California New Year's Eve into New Year's Day. Read More >

What's New?

Flood Inundation Maps are now available for the Wisconsin River at Portage. These maps were created in partnership with the DNR. These interactive maps will help convey the impacts of flooding for local officials, property owners and motorists. Use these maps to answer questions like, "What roads may be impacted at 17 feet, and where are alternate safer routes?" and "If the river reaches 18 feet, how may my property be affected?".

To view all locations with flood inundation mapping click here.

How To Use it

Here is a video demonstration of how to use the maps. Note, graphics and images in the video are not a current forecast and are for demonstration purposes only.

Where are The Maps?

Go to the main NWS Milwaukee webpage (weather.gov/milwaukee) and hover over Rivers and Lakes. Then, click the link that pops up and that is titled National Water Prediction Service (NWPS). (Note, this page is in transition to a newer page. In late May, clicking Rivers and Lakes will go directly to the National Water Prediction Service page.)

weather.gov/milwaukee

Then select the gauge location where flood inundation mapping is available and Select the Full Information tab:

Scroll down on the new page until you see the map. Then select 'Activate FIM Gauge'.

To see all locations where inundation mapping is available select 'Only display Partner FIM Gauges'.

Contact sarah.marquardt@noaa.gov with any questions.

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Snow Squalls May Impact New Year's Eve Travel from the Great Lakes to the Mid-Atlantic; Heavy Rain Returns to California

Portage Flood Inundation Maps