Flood Potential Outlook
Issued by NWS St. Louis, MO

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FGUS73 KLSX 262110

Hydrologic Outlook
National Weather Service Saint Louis MO
410 PM CDT Wed Apr 26 2017

410 PM CDT Wed Apr 26 2017

...Significant flooding may develop with weekend rainfall...

A strong slow moving storm system will affect the region over the
weekend. A warm moist air mass will be in place across a portion of
the area as the storm system moves through. Unusually high
atmospheric moisture will allow for high rainfall rates. These high
rainfall rates will combine with the slow movement of the system to
produce multiple rounds of heavy rain. Widespread rainfall totals of
2 to 7 inches are expected between Friday and Sunday evening, with
the highest rainfall totals expected over southern portions of
Missouri and Illinois. This rainfall is expected on the wet soils
left from today`s rainfall, enhancing the expected runoff.

The latest river modeling using this expected rainfall is indicating
a potential of moderate to major flooding in river basins mostly to
the south and east of St. Louis, including the Black, the Bourbeuse,
the Meramec, the Big, and the Kaskaskia river basins.

People should remain alert to the possibility of flooding, particularly
in flood prone areas through the weekend. Stay informed of the
latest National Weather Service forecast and be prepared to take
protective action should any flooding develop.



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