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Hazardous Weather Outlook

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
344 PM CDT Fri Apr 28 2017

ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019-
292045-
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-
344 PM CDT Fri Apr 28 2017 /444 PM EDT Fri Apr 28 2017/

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

.DAY ONE...Tonight.

WEATHER HAZARDS EXPECTED:
  Limited Thunderstorm Risk.

DISCUSSION:

Isolated to scattered thunderstorms are possible south of a
Gibson City, Illinois to Rensselaer, Indiana line.


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

Saturday...
  Elevated Flooding Risk.
  Limited Severe Thunderstorm Risk.
Sunday...
  Elevated Flooding Risk.
  Limited Severe Thunderstorm Risk.
Monday...
  Limited Non Thunderstorm Wind Risk.

DISCUSSION:

A large storm system will migrate toward the area through the
weekend. Several periods of rain are expected, moderate to heavy
at times, especially Saturday afternoon into Sunday. Significant
rainfall totals are possible which could result in flooding late
in the weekend and lead to significant rises on area rivers. The
threat of strong to severe thunderstorms remains, especially on
Sunday.

In addition...flooding is expected along most of the area rivers.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be necessary through tonight.

GENERAL STORM MOTION OF THE DAY:

Moving from southwest to northeast at 50 MPH.

&&

$$



Flood Watch

Flood Watch
National Weather Service Chicago/Romeoville IL
1151 AM CDT Fri Apr 28 2017

...The National Weather Service in Chicago has issued a Flood Watch
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
  Du Page River at Shorewood affecting Will County
  East Branch Du Page River at Bolingbrook affecting Will County
  Fox River at Algonquin Tailwater affecting Kane and McHenry
  Counties
  Fox River at Montgomery affecting Kane and Kendall Counties
  Fox River at Dayton affecting La Salle County

.Heavy rain is possible this weekend with rainfall totals of up to
3 to 5 inches forecast across northeast Illinois.  This would affect
the Kishwaukee...Du Page and Fox Rivers.  As the forecast rainfall is
for a period of 72 hours...there is high uncertainty in the amounts.
Please remain aware of river levels in your area and keep up with the
latest forecast information.

ILZ005-012-290450-
/O.NEW.KLOT.FL.A.0015.170501T0600Z-000000T0000Z/
/AFBI2.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
1151 AM CDT Fri Apr 28 2017

The National Weather Service in Chicago has issued a
* Flood Watch for
  The Fox River at Algonquin Tailwater
* from late Sunday night until further notice.
* At 10:30 AM Friday the stage was 7.7 feet.
* Minor flooding is possible.
* Flood stage is 9.5 feet.
* Recent activity...Flood forecasts for algonquin were moved to this
  location on july 5 2011. Gage zero datum is different from the old
  gage location. Flood and action stages have changed.
* Forecast...Flood stage may be reached by early Monday morning.


&&

LAT...LON 4238 8830 4237 8817 4221 8814 4194 8827
      4195 8838 4224 8828

$$



Hydrologic Outlook

Hydrologic Outlook
ILC007-031-037-043-053-063-075-089-091-093-097-099-103-105-111-
141-197-201-INC007-073-089-111-127-282200-

Hydrologic Outlook
National Weather Service Chicago IL
448 AM CDT Fri Apr 28 2017 /548 AM EDT Fri Apr 28 2017/

...Potential for Heavy Rain Late Saturday through Sunday
Evening...

A dynamic low pressure system will result in a northward surge of
Gulf moisture over the region on Saturday. High moisture levels,
and a prolonged period of rainfall will likely result in rises in
local rivers. Rainfall totals through Sunday night may exceed 4
inches across portions of the area.

While uncertainty remains with the placement of the heaviest
rainfall axis, the potential for high rainfall rates and amounts
will likely result in increased runoff into local rivers and
streams. This could push area streams and rivers into flood.
Residents living in flood prone areas should pay close attention
to the latest forecast information. Since the bulk of the
rainfall may be at night, motorists should be especially cautious
as flooding is harder to recognize at night.

$$




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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