Hydrometeorological Discussion
Issued by NWS North Central River Forecast Center

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AGUS73 KMSR 271706

Hydrometeorological Forecast Discussion
NWS North Central River Forecast Center Twin Cities/Chanhassen MN
1206 PM CDT Sat May 27 2017

During the last 24 hours, rain fell over northeast Minnesota,
upper Michigan, northern and southern Wisconsin, southern lower
Michigan, northern Indiana, the northern half of Illinois, the
southeast third of Iowa and portions of eastern Missouri.  The
heaviest rain fell along the I-80 corridor between Iowa City, IA
and Toldeo, OH, and in a larger area more generally bounded by
I-74 and I-90 south of the Wisconsin border. Widespread reports of
half to one inch were received in these areas. Otherwise most
reports were less than a quarter inch.

During the next 24 hours, a mesoscale convective system will bring
widespread areas of half to one and a half inches over southwest
into central Iowa...and locally higher amounts are likely.  Half
to one and a half inches are also possible over southern Missouri
and Illinois as thunderstorms continue to develop there.  Areas in
the NCRFC area most likely affected would be the Meramec River and
Big Muddy River basins which still have wet antecedent conditions
from flooding rains in late April and early May.  Elsewhere, only
scattered light showers are expected, with no rain forecast for
western and central Minnesota and northwest Wisconsin.  For Sunday
into Monday morning, the focus for significant precipitation
shifts to the Great Lakes region.

...Hydrologic Conditions...

Significant flooding continues on the lower Illinois River at
Havana and Beardstown Illinois for the foreseeable future.

The Mississippi River is near crest at Guttenburg (LD 10).
As the crest travels downstream there will be Significant (
moderate) flooding along the Illinois-Iowa border portion
of the Mississippi River all the way down to Burlington, Iowa.

The Mississipi River will also have minor flood stage impacts
further downstream along Missouri and southern Illinois. Crests
are expected for a week or so. The COE will have no control of
the river for some time.

Another notable location with moderate flooding is Cosperville on
the North Branch of the Elhart River in northern Indiana. The
moderate flood impacts so far are minimal however a coming storm
system create additional problems.

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: RHR ALH SAS LNE

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



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