Flood Potential Outlook
Issued by NWS Central Illinois

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FGUS73 KILX 250834

Hydrologic Outlook
National Weather Service Lincoln IL
334 AM CDT Tue Jul 25 2017


An extremely moist air mass will be in place across central
Illinois Wednesday night. An area of thunderstorms is expected to
move across southeast Iowa during the evening hours, then track
across central Illinois late evening and overnight. This area of
storms is expected to be through the area by midday Thursday, with
rain continuing further south.

Present indications are that rainfall amounts of 1 to 3 inches are
likely in areas along the I-74 corridor, potentially as far south
as Havana and Lincoln, especially between late Wednesday evening
and sunrise Thursday. Locally heavier totals are a significant
concern, given the tropical air mass in place and the potential
for storms to repeatedly move across the same areas. This would
likely cause significant rises on area rivers. The Illinois River
is already rising due to heavy rains that occurred over northern
Illinois recently, and this amount of rain would likely result in
a faster and higher rise.

There has been some uncertainty as to the exact location of the
heaviest rain potential. Be sure to monitor later forecasts for
updates on this situation, as there is potential for flooding to
occur late Wednesday night into early Thursday.



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