Hydrometeorological Discussion
Issued by NWS North Central River Forecast Center

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AGUS73 KMSR 241753
HMDMSR

Hydrometeorological Forecast Discussion
NWS North Central River Forecast Center Twin Cities/Chanhassen MN
1252 PM CDT Mon Jul 24 2017

...Precipitation...

Scattered thunderstorms yesterday produced 1 to 3 inches of rain
in eastern Upper Michigan to northern lower Michigan and in
northeast Illinois.  A few thunderstorms also had near an inch of
rain for some locations in southeast lower Michigan and northeast
Missouri.  Scattered lighter showers produced around a quarter
inch of rain mainly in Wisconsin and southern lower Michigan to
northern Indiana.

In the forecast today ... around a tenth to quarter inch of rain
is expected with scattered showers and thunderstorms across North
Dakota to Minnesota.

...Hydro-logic Conditions...

Isolated thunderstorms last night in northern Illinois pushed the
Fox River up about another half foot to set a new record for the
third time in four days.

Significant flooding continues in southern Wisconsin, northern
Illinois and eastern Iowa from multiple rounds of heavy rain over
the last week and a half.  Affected rivers above moderate flood
stage include: Des Plaines, Fox (Illinois), Rock (and its
tributaries: Pecatonica, Sugar and Kishwaukee), Wapsipinicon,
Baraboo, and the Kickapoo.  The Kickapoo and Des Plaines Rivers
are now in recession and will fall below moderate stages in the
next day or two.  The Rock River flood will be a top five to top
ten event for the lower end at Joslin and Moline.

The recent additional rounds of rain are adding to the expected
rise on the Mississippi downstream of Dubuque.   The Mississippi
is now likely to see moderate flooding at Rock Island through
Burlington Iowa, and minor flooding down to Lock and Dam 25 near
Winfield Missouri.

With only light rain showers in the forecast for today, no new
flooding is immediately expected.  Rain will return midweek for
the NCRFC area.  This could cause additional action and flood
stage rises in Minnesota, and already swollen rivers in Iowa,
Illinois and Wisconsin will see sustained high flows.

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

NCRFC will be staffed 24 hours until further notice.

$$

...rhr/jmp...





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