Hydrometeorological Discussion
Issued by NWS North Central River Forecast Center

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7
AGUS73 KMSR 261747

Hydrometeorological Forecast Discussion
NWS North Central River Forecast Center Twin Cities/Chanhassen MN
1246 PM CDT Fri May 26 2017

Between half and one and a half inches of rain fell along the
Detroit River in far southeast lower Michigan.  Otherwise, light
rain showers and sprinkles brought less than a tenth of an inch to
the eastern three quarters of lower Michigan, much of Wisconsin,
the southeast two thirds of Minnesota, northern Missouri, and
widely scattered areas of Iowa, Illinois and North Dakota.

During the next 24 hours....thunderstorms should drop between half
and three quarters of a inch between I-74 and I-90 in Illinois.
Most areas east of I-35 in the NCRFC forecast area can expect
lighter amounts of rain.  For Saturday into Sunday morning...most
areas will see scattered light showers but the focus for heavier
rain shifts south where areas along and south of I-70 in Illinois
and Missouri could see half to one and a half inches of rain. The
weather pattern begins drying out from Sunday afternoon through
midweek of the coming week.

...Hydrologic Conditions...

Significant flooding continues on the lower Illinois River due to
multiple rounds of heavy rain over the last few weeks.

There is a high likelihood of significant (moderate) flooding
along the Illinois-Iowa border portion of the Mississippi River.
This begins Saturday at Dubuque, IA, and continues through the
coming weeks as the flood wave travels downstream.

The aforementioned mainstem flooding is the result of a wet
several weeks in the area.  Many rivers have seen minor flooding
and bankfull rises across much of the Upper Mississippi and Great
Lakes drainages.  Smaller tributaries and headwaters rivers have
generally crested, but many locations are still seeing secondary
rises, long duration crests and extended recessions.

As the elevated tributary inflows work their way into the
mainstem Mississippi, flooding is occurring or forecast along the
entire system, from Minnesota to Chester, IL, and on to the south
of the NCRFC area.

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.



USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.