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Hazardous Weather Outlook

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
352 AM CDT Fri Sep 20 2019

ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019-
210900-
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-
352 AM CDT Fri Sep 20 2019 /452 AM EDT Fri Sep 20 2019/

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

.DAY ONE...Today and Tonight.

Weather hazards expected...

  Limited Thunderstorm Risk.

DISCUSSION...

After early morning showers and storms south of I-80 dissipate,
there will be a low threat for a few thunderstorms this afternoon.
Brief, locally heavy rainfall would be the main threat.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

Saturday...
  Elevated Flooding Risk.
Sunday...
  Elevated Flooding Risk.
  Limited Thunderstorm Risk.
Tuesday through Thursday...
  Limited Thunderstorm Risk.

DISCUSSION:

Several periods of rain are possible from Saturday through Sunday
evening as tropical moisture works its way northward ahead of a
cold front. Heavy rainfall could lead to renewed rises along area
rivers that are still in flood stage, and could also lead to areas
of flash flooding, although uncertainty remains regarding the
placement of the main axis of heaviest rainfall.

.SPOTTER INFORMATION STATEMENT...

  Spotter activation will not be necessary through tonight.

GENERAL STORM MOTION OF THE DAY:

  Moving toward east at 20 mph.

$$



Flood Warning

Flood Statement
National Weather Service Chicago/Romeoville IL
851 AM CDT Fri Sep 20 2019

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

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

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


PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

ILC089-093-210350-
/O.CON.KLOT.FL.W.0144.000000T0000Z-190926T1200Z/
/MNGI2.1.ER.190913T0856Z.190913T2245Z.190926T0600Z.NR/
851 AM CDT Fri Sep 20 2019

The Flood Warning continues for
  The Fox River at Montgomery, or from Red Gate Road in St. Charles
  downstream to Millington.
* until Thursday morning.
* At  745 AM Friday the stage was 13.4 feet.
* Flood stage is 13.0 feet.
* Minor flooding is occurring and Minor flooding is forecast.
* Forecast...The river will continue to fall to below flood stage by
  early Thursday morning.
* Impact...At 13.5 feet...Low-lying parking lots at city hall and Boy
  Scout Island are threatened in St. Charles. Fox River Trail is
  threatened at St. Mary Park in St. Charles.

&&

LAT...LON 4195 8838 4194 8827 4169 8826 4154 8860
      4163 8860 4173 8838


$$



Hydrologic Outlook

Hydrologic Outlook
ILC007-031-037-043-053-063-075-089-091-093-097-099-103-105-111-
141-197-201-INC007-073-089-111-127-211030-

Hydrologic Outlook
National Weather Service Chicago IL
523 AM CDT Fri Sep 20 2019 /623 AM EDT Fri Sep 20 2019/

...Heavy rainfall possible this weekend...

A slow-moving storm system moving into the area by late this
weekend has the potential to produce heavy rainfall across the
area. This system may bring renewed flooding to the area,
especially if heavy rainfall occurs in the Des Plaines, Fox, and
Rock River Basins which continue to run at elevated levels. The
flood potential exists from primarily Saturday night 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.

Several rounds of rainfall will be possible from Saturday
afternoon through Sunday evening. Widespread rainfall amounts of
one to three inches are possible across the region, with localized
amounts of three to five inches. However, the exact location of
heaviest rainfall remains uncertain at this time. If repeated
rounds of heavy rainfall occur, flash flooding and subsequent rises
on area rivers would be possible.

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.

$$



U.S. Dept. of Commerce
NOAA National Weather Service
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Silver Spring, MD 20910
E-mail: w-nws.webmaster@noaa.gov
Page last modified: May 16, 2007
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