NOAA-NWS-ALERTS-IL125D10FBE6E8.HydrologicOutlook.125D11094A40IL.LOTESFLOT.90f3a874605d3a0abfbdbec30dc7bd50 w-nws.webmaster@noaa.gov 2019-09-26T15:26:00-05:00 Actual Alert Public Alert for Boone; Cook; De Kalb; DuPage; Ford; Grundy; Iroquois; Kane; Kankakee; Kendall; La Salle; Lake; Lee; Livingston; McHenry; Ogle; Will; Winnebago (Illinois) Issued by the National Weather Service Met Hydrologic Outlook Future Unknown Possible SAME 2019-09-26T15:26:00-05:00 2019-09-27T03:00:00-05:00 NWS Chicago (Northeastern Illinois and Northwestern Indiana) Hydrologic Outlook issued September 26 at 3:26PM CDT by NWS Chicago …Heavy rainfall threat Friday and Friday evening… A weather system moving into the area has the potential to produce heavy rainfall across the area, with the window for heaviest rainfall late Friday afternoon and into the evening. Rainfall may lead to flooding, especially if occurring in the Des Plaines, Fox, and Rock River Basins which continue have elevated water levels. Much above normal rainfall has occurred across portions of northern Illinois and southern Wisconsin over the last couple weeks. This wet weather has caused elevated soil moisture and elevated water levels on several rivers and streams. Heavy rainfall is possible, primarily Friday morning and then again late Friday afternoon and evening. One to three inches of rainfall is possible across portions of the region, with localized higher amounts. While the exact locations and amounts of the heaviest rainfall remains a bit uncertain at this time, there are signs that portions of northern IL could be impacted. If heavy rainfall occurs, rises on area rivers would be possible, along with the potential for areas of flash flooding. The Des Plaines, Fox, and Rock River Basins are more vulnerable to heavy rainfall due to elevated water levels. This outlook means that elevated water levels and potential impacts are possible, but not yet certain. Persons should closely monitor forecasts including the possibility of flood watches, warnings, and advisories. WMOHEADER UGC ILC007-031-037-043-053-063-075-089-091-093-097-099-103-105-111-141-197-201-INC007-073-089-111-127 VTEC TIME…MOT…LOC

Boone; Cook; De Kalb; DuPage; Ford; Grundy; Iroquois; Kane; Kankakee; Kendall; La Salle; Lake; Lee; Livingston; McHenry; Ogle; Will; Winnebago FIPS6 017007 FIPS6 017031 FIPS6 017037 FIPS6 017043 FIPS6 017053 FIPS6 017063 FIPS6 017075 FIPS6 017089 FIPS6 017091 FIPS6 017093 FIPS6 017097 FIPS6 017099 FIPS6 017103 FIPS6 017105 FIPS6 017111 FIPS6 017141 FIPS6 017197 FIPS6 017201 UGC ILC007 UGC ILC031 UGC ILC037 UGC ILC043 UGC ILC053 UGC ILC063 UGC ILC075 UGC ILC089 UGC ILC091 UGC ILC093 UGC ILC097 UGC ILC099 UGC ILC103 UGC ILC105 UGC ILC111 UGC ILC141 UGC ILC197 UGC ILC201

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