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Hydrologic Outlook

Hydrologic Outlook

Hydrologic Outlook
National Weather Service Grand Rapids MI
1206 PM EDT Wed Jun 23 2021

...Several Days of Widespread Heavy Rainfall and River Rises on the

Several days of heavy rainfall will move into Lower Michigan
beginning Thursday night and continue through early next week. All
rivers will see significantly rising water levels, and flooding on
some of our rivers is possible as early as this weekend. The good
news is that the Grand and Muskegon river basins are starting out at
extremely low levels due to the ongoing drought. The Kalamazoo River
basin has had more rain in the last week, and so is starting out at
a level closer to normal for this time of year. At this time the
best estimates suggest 2-4 inches or more of rain are possible
across most of Southwest and West-Central Michigan. Thankfully this
rain will come in multiple rounds spanning several days, rather than
all in one shot. This will help the rivers pass the water hopefully
without getting to the point of overflowing (flooding).

The second area of concern is for more of our typical ponding of
water on roads, low-spots, and poor drainage areas. There will be
several batches of thunderstorms moving through Michigan, and with
humidity levels surging back up to where they were last week, we are
expecting some places to see torrential downpours at times. As
usual, this will probably primarily affect drivers and road
conditions, so be alert for ponded water and possible flooded roads
after one of these heavy thunderstorms passes through.

This statement will be updated as necessary.

The latest information is always available at



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