Issued by NWS North Central River Forecast Center
AGUS73 KMSR 231630
Hydrometeorological Forecast Discussion
NWS North Central River Forecast Center Twin Cities/Chanhassen MN
1130 AM CDT Tue Aug 23 2016
Overnight a thunderstorm complex moved across the Upper
Peninsula of Michigan and neighboring parts of Wisconsin before
dying out in northern lower Michigan. Rainfall totals there were
in the one tenth to one inch range. A small storm popped up and
dissipated overnight in eastern North Dakota and northwest
Minnesota including Grand Forks. This storm dropped up to about a
half inch. A couple stray showers yesterday morning and a few
this morning dropped light amounts in isolated locations of
southern Minnesota and Missouri.
This morning, additional showers are popping up in North Dakota
and Missouri, but accumulations with each are expected to be
relatively light. A larger complex is expected to form this
afternoon and evening in Iowa and will spread into neighboring
states. Widespread totals will range from one to two inches with
a likelihood for much higher amounts in heavy convective bands.
The boundary associated with tonight`s complex is expected to sag
southward, with light showers throughout the day tomorrow
spreading across Illinois into Indiana and Michigan. Tomorrow
afternoon and evening will see redevelopment along the boundary in
northern Missouri and across central Illinois. Totals are
expected to be lighter with widespread one inch accumulations, but
potential remains for much higher totals in isolated bands by
Thursday morning. Thursday, Friday, and into the weekend, we will
continue to see rainfall in much of the NCRFC area.
Moderate flooding is occuring on the Kankakee River near Davis,
Indiana. Levels are expected to fall below moderate later today.
Minor flooding is occurring on rivers in Minnesota, Illinois and
Michigan in response to heavy precipitation last week.
At this time some scattered minor flooding is expected from the
rainfall that is forecast mainly over Iowa in the next 2 days.
Depending on placement and intensity of the rainfall, some
localized significant flooding is possible.
For additional and more in-depth information concerning river
forecasts, precipitation and all hydrometeorological information
in the NCRFC area of responsibility, please refer to the NCRFC
web page at: http://www.weather.gov/ncrfc
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