Hydrometeorological Discussion
Issued by NWS North Central River Forecast Center

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AGUS73 KMSR 091802

Hydrometeorological Forecast Discussion
NWS North Central River Forecast Center Twin Cities/Chanhassen MN
1201 PM CST Sat Dec 9 2017

The last 24 hours saw another round of broadly spread
precipitation covered Wisconsin, Michigan, north eastern Minnesota
and even extended into northern Indiana and Illinois.  Precip
totals were mostly less than 0.25 inches. However, as we have seen
several times in the last couple of days, precipitation higher in
northern Michigan and especially the Upper Peninsula. With the
temperatures remaining low, the 0.25-0.4 inches of precipitation
observed in those areas came in the form of 5-11 inches of snow.

The forecast for the next 48 hours is nearly identical to the last
48.  Light precipitation is expected in more or less exactly the
same areas that have been hit in the last 48 hours and is expected
to produce similar amounts.

...Hydrologic Conditions...

The flooding is expected anytime soon in the NCRFC area.

However, ice development and its impacts are a focus of concern
within the NCRFC area.  With river levels running above normal over
the northern portion of the region, the continued colder weather
expected this next couple weeks will be conducive to ice
production. Areas that are more prone to freeze up ice jams may
begin to see elevated levels.  NCRFC is seeing some signals of high
potential at the following locations:

Wolf River at Langlade Wisconsin
Wisconsin River at Portage Wisconsin

In addition to ice jam concerns, the colder temperatures are
expected cause an "ice bite" on the large rivers in the northern
portion of NCRFC and inevitibly the mainstem Mississippi.  Ice
bite occurs on the Mississippi River when rivers and streams that
feed the Mississippi freeze over and shut off the water.  This can
cause a concerning sudden drop in levels on the navigation rivers.
NCRFC will continue to monitor the ice jam and ice bite potential.

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

Emergency Call Back List: (in order MAW  ... SAS ... ANM)

If no response from this list, call the DOH, SCH or HIC.



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