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5 products issued by NWS for: Chicago IL
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Hazardous Weather Outlook

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
459 PM CDT Thu Jul 20 2017

ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019-
212200-
Winnebago-Boone-McHenry-Lake Illinois-Ogle-Lee-De Kalb-Kane-
DuPage-Cook-La Salle-Kendall-Grundy-Will-Kankakee-Livingston-
Iroquois-Ford-Lake Indiana-Porter-Newton-Jasper-Benton-
459 PM CDT Thu Jul 20 2017 /559 PM EDT Thu Jul 20 2017/

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS...
NORTHEAST ILLINOIS AND NORTHWEST INDIANA.

.DAY ONE...Tonight.

WEATHER HAZARDS EXPECTED:
  Limited Thunderstorm Risk...with an associated:
      Limited Hail Risk...up to quarter size.
      Limited Thunderstorm Wind Damage Risk...up to 60 MPH.
  Limited Flooding Risk.
  Elevated Excessive Heat Risk through this evening.
  Elevated Fog Risk.

DISCUSSION:

Scattered thunderstorm development is possible along and south of a
Rochelle, IL to Rensselaer, IN line late this evening through the
overnight hours. The main threat from all storms will be
torrential rainfall. However, the strongest storms will be
capable of producing large hail and damaging winds.

Flooding will continue along portions of the Fox and Des Plaines
Rivers.

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

Friday...
  Significant Flooding Risk.
  Elevated Severe Thunderstorm Risk.
  Elevated Excessive Heat Risk.
  Limited Fog Risk.
Saturday...
  Limited Flooding Risk.
  Elevated Severe Thunderstorm Risk.
  Elevated Excessive Heat Risk.
Sunday...
  Limited Thunderstorm Risk.
Wednesday...
  Limited Thunderstorm Risk.

DISCUSSION:

An active and humid weather pattern will continue through
Saturday. Thunderstorms are likely at times Friday and more so
Friday evening into Saturday morning, especially north of
Interstate 80. The potential for heavy rain in the region is
significant which could cause worsened flooding. However, the
exact location of the heaviest rainfall is uncertain. In addition
there is a severe thunderstorm threat, mainly north of Interstate
80, on Friday and Friday night as well. Thunderstorm chances
continue on Saturday, shifting mainly along and south of
Interstate 80 by Saturday night.

Heat index readings will approach 105 degrees both Friday and
Saturday, mainly along and south of Interstate 80.

In addition, flooding will continue along portions of the Fox and
Des Plaines Rivers and may develop along other rivers of far
northern Illinois.

.SPOTTER INFORMATION STATEMENT...

Spotters may be needed late this evening.

GENERAL STORM MOTION OF THE DAY:

Moving toward the southeast at 35 to 40 MPH.

&&

$$



Flash Flood Watch

Flood Watch
National Weather Service Chicago/Romeoville IL
215 PM CDT Thu Jul 20 2017

ILZ003>006-008-010>014-019>022-210315-
/O.NEW.KLOT.FF.A.0004.170721T2100Z-170722T1400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-Cook-
La Salle-Kendall-Grundy-Will-
Including the cities of Rockford, Belvidere, Woodstock, Waukegan,
Oregon, Dixon, Dekalb, Aurora, Elgin, Wheaton, Chicago, Ottawa,
Oswego, Morris, and Joliet
215 PM CDT Thu Jul 20 2017

...FLASH FLOOD WATCH IN EFFECT FROM FRIDAY AFTERNOON THROUGH
SATURDAY MORNING...

The National Weather Service in Chicago has issued a

* Flash Flood Watch for portions of north central Illinois and
  northeast Illinois, including the following areas, in north
  central Illinois, Boone, De Kalb, La Salle, Lee, Ogle, and
  Winnebago. In northeast Illinois, Cook, DuPage, Grundy, Kane,
  Kendall, Lake IL, McHenry, and Will.

* From Friday afternoon through Saturday morning.

* Multiple rounds of thunderstorms producing heavy rainfall, with
  rates well over one inch per hour, are likely to move across
  portions of north central and northeast Illinois late Friday
  afternoon through early Saturday morning.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

&&

$$

Rodriguez



Flood Advisory

Flood Advisory
National Weather Service Chicago/Romeoville IL
212 PM CDT Thu Jul 20 2017

...The Flood Advisory continues for the Des Plaines River...
  Des Plaines River at River Forest affecting Cook County

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Additional information can be found at weather.gov/chicago.

&&

ILC031-210712-
/O.CON.KLOT.FL.Y.0149.000000T0000Z-170722T0000Z/
/RVFI2.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
212 PM CDT Thu Jul 20 2017

The Flood Advisory continues for
  The Des Plaines River at River Forest
* until Friday evening.
* At  100 PM Thursday the stage was 14.9 feet.
* Action stage is 13.0 feet.
* Flood stage is 16.0 feet.
* Forecast...The river will rise to near 15.4 feet by early Friday.

&&

LAT...LON 4196 8790 4197 8780 4187 8777 4186 8787


$$
ACS



Flood Warning

Flood Statement
National Weather Service Chicago/Romeoville IL
209 PM CDT Thu Jul 20 2017

...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
  Des Plaines River at Riverside affecting Cook County
  Fox River at Algonquin Tailwater affecting Kane and McHenry
  Counties

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

ILC031-210908-
/O.EXT.KLOT.FL.W.0103.170720T1907Z-170723T0000Z/
/RVRI2.1.ER.170720T1348Z.170721T1200Z.170722T1800Z.UU/
209 PM CDT Thu Jul 20 2017

The Flood Warning continues for
  The Des Plaines River at Riverside.
* from this afternoon to Saturday evening.
* At  145 PM Thursday the stage was 7.4 feet.
* Flood stage is 7.0 feet.
* Minor flooding is occurring and Minor flooding is forecast.
* Forecast...The river will continue rising to near 7.8 feet by
  Friday morning. The river will fall below flood stage Saturday
  afternoon.
* Impact...At 7.5 feet...Park areas are inundated near Salt Creek.

&&

LAT...LON 4187 8777 4183 8776 4174 8780 4178 8791
      4184 8786 4186 8787

$$
ACS



Flood Warning

Flood Statement
National Weather Service Chicago/Romeoville IL
209 PM CDT Thu Jul 20 2017

...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
  Des Plaines River at Riverside affecting Cook County
  Fox River at Algonquin Tailwater affecting Kane and McHenry
  Counties

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

ILC031-210909-
/O.EXT.KLOT.FL.W.0097.000000T0000Z-170725T0000Z/
/DSPI2.3.ER.170712T1631Z.170714T1100Z.170724T1800Z.NR/
209 PM CDT Thu Jul 20 2017

The Flood Warning continues for
  The Des Plaines River near Des Plaines.
* until Monday evening.
* At  145 PM Thursday the stage was 18.3 feet.
* Flood stage is 15.0 feet.
* Recent activity...Gage datum was changed by 10 feet on Nov 14 2014.
  Flood thresholds and flood impacts are now 10 feet higher than
  previous values.
* Moderate flooding is occurring and Moderate flooding is forecast.
* Forecast...The river will continue rising slightly to near 18.4
  feet by this evening. The river will fall below flood stage Monday
  afternoon.
* Impact...At 18.5 feet...Flood waters affect residential areas of Big
  Bend Drive, Mason Lane, River Road, and Howard.

&&

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


$$



U.S. Dept. of Commerce
NOAA National Weather Service
1325 East West Highway
Silver Spring, MD 20910
E-mail: w-nws.webmaster@noaa.gov
Page last modified: May 16, 2007
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