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Hazardous Weather Outlook

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
236 PM CDT Thu Sep 19 2019

Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-Cook-
La Salle-Kendall-Grundy-Will-Kankakee-Livingston-Iroquois-Ford-
Lake IN-Porter-Newton-Jasper-Benton-
236 PM CDT Thu Sep 19 2019 /336 PM EDT Thu Sep 19 2019/

This Hazardous Weather Outlook is for portions of North Central
Illinois...Northeast Illinois and Northwest Indiana.

.DAY ONE...Tonight.

Weather hazards expected...

  Limited Thunderstorm Risk.
  Limited Flooding Risk.


Scattered thunderstorms are possible tonight, mainly after
midnight. Severe weather is not anticipated, but locally heavy
rainfall may occur.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

  Limited Thunderstorm Risk.
  Limited Thunderstorm Risk.
  Elevated Flooding Risk.
  Elevated Flooding Risk.
  Limited Thunderstorm Risk.
Tuesday and Wednesday...
  Limited Thunderstorm Risk.


A period of heavy rain is possible Saturday night into Sunday
as tropical moisture works its way northward ahead of a cold front.
This would lead to renewed concerns along area rivers that are still
in flood stage from heavy rain this past weekend, and could also lead
to areas of flash flooding.


  Spotter activation will not be necessary through tonight.


  Moving toward the east at 20 mph.


Hydrologic Outlook

Hydrologic Outlook

Hydrologic Outlook
National Weather Service Chicago IL
106 PM CDT Thu Sep 19 2019 /206 PM EDT Thu Sep 19 2019/

...Heavy rainfall possible this weekend...

A slow-moving frontal system moving into the area by late this
weekend has the potential to produce heavy rainfall across the
area. Rainfall may lead to flooding, especially if occuring in
the Des Plaines, Fox, and Rock River Basins where recent heavy
rainfall has caused elevated water levels.

This flood potential exists from late this weekend through at
least early next week.

Over the last week, 2 to 6 inches of rainfall has occurred across
portions of far northern Illinois and southern Wisconsin, with
5 to 10 inches over the last two weeks. This wet weather has
contributed to elevated soil moisture and water levels.

Heavy rainfall is possible late this weekend as a cold front moves
into the area and interacts with moisture from the remnants of
Tropical Storm Imelda, which has recently moved inland over
southeast Texas. One to three inches of rainfall is possible
across portions of the region, but exact location and amounts of
rainfall are uncertain at this time. If heavy rainfall occurs,
rises on area rivers would be possible, including the possibility
of flooding if heavy rainfall occurs in areas with already
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.



Flood Warning

Flood Statement
National Weather Service Chicago/Romeoville IL
953 AM CDT Thu Sep 19 2019

...The Flood Warning continues for the following rivers in

  Des Plaines River near Russell affecting Lake County
  Des Plaines River near Gurnee affecting Lake County
  Des Plaines River at Lincolnshire affecting Lake County
  Des Plaines River near Des Plaines affecting Cook County

  Fox River at Montgomery affecting Kane and Kendall Counties
  Fox River at Algonquin Lock & Dam tailwater affecting Kane and
  McHenry Counties

The following forecasts are based on observed precipitation as well
as forecast precipitation 24-48 hours into the future.


Safety message...If you encounter a flooded roadway...turn around and
find an alternate route.


953 AM CDT Thu Sep 19 2019

The Flood Warning continues for
  The Des Plaines River near Des Plaines, or from Palatine Road in
  Prospect Heights downstream to Irving Park Road in Chicago.
* until Saturday afternoon.
* At  945 AM Thursday the stage was 16.4 feet.
* Flood stage is 15.0 feet.
* Minor flooding is occurring and Minor flooding is forecast.
* Forecast...The river will continue to fall to below flood stage by
  Saturday morning.


LAT...LON 4212 8794 4212 8784 4197 8780 4196 8790


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Silver Spring, MD 20910
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