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2 products issued by NWS for: Amf Ohare IL
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Hazardous Weather Outlook

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
411 AM CDT Mon Aug 20 2018

ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019-
210915-
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-DeKalb-Kane-DuPage-Cook-
La Salle-Kendall-Grundy-Will-Kankakee-Livingston-Iroquois-Ford-
Lake IN-Porter-Newton-Jasper-Benton-
411 AM CDT Mon Aug 20 2018 /511 AM EDT Mon Aug 20 2018/

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

.DAY ONE...Today and Tonight.

Weather hazards expected...

  Significant Thunderstorm Risk...with an associated:
     Elevated Tornado risk.
  Limited Flooding Risk.
  High Swim Risk

DISCUSSION...

A wave of showers and thunderstorms, some with heavy downpours,
will move across the outlook area this morning into the early to
mid afternoon.

Behind this activity, additional isolated to scattered
thunderstorms are forecast to develop this afternoon from
northwest Illinois arcing southeast to portions of east central
Illinois. Conditions could become favorable for a couple of these
storms to potentially become tornadic from late this afternoon
until around sunset. The greatest risk of severe weather is south
and west of a line from Dixon to Joliet to Fowler Indiana.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Tuesday...
  Limited Thunderstorm Risk.
  Elevated Lakeshore Flood Risk
  High Swim Risk
Wednesday...
  High Swim Risk
Friday...
  Elevated Thunderstorm Risk.
Saturday...
  Limited Thunderstorm Risk.
Sunday...
  Limited Thunderstorm Risk.
  Limited Excessive Heat Risk.

.SPOTTER INFORMATION STATEMENT...

  Spotters may be needed between 2 pm and 9 pm.

GENERAL STORM MOTION OF THE DAY:

  Moving toward the north or northeast at 25 mph.

$$



Beach Hazards Statement

LAKESHORE HAZARD MESSAGE
National Weather Service Chicago IL
1118 AM CDT Mon Aug 20 2018

ILZ006-014-210030-
/O.CON.KLOT.BH.S.0012.000000T0000Z-180821T0600Z/
Lake IL-Cook-
1118 AM CDT Mon Aug 20 2018

...BEACH HAZARDS STATEMENT REMAINS IN EFFECT THROUGH LATE
TONIGHT...

* LOCATION...Lake Michigan beaches in Illinois.

* HIGH WAVE ACTION AND DANGEROUS SWIMMING CONDITIONS EXPECTED.

* FORECAST WAVE HEIGHTS...3 to 6 feet.

* STRONG RIP CURRENTS AND STRUCTURAL CURRENTS EXPECTED.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Life threatening waves and currents are expected at the beaches.
People visiting the beaches should stay out of the water.

Rip currents are powerful channels of water flowing quickly away
from shore, which occur most often at low spots or breaks in
sandbars. Rip currents can sweep you into deeper water.

Structural currents form along piers where longshore currents and
wave action flow into the structure. Structural currents can
sweep you into deeper water along the pier structure.

Exposed beaches are more likely to experience the most
significant wave and current impacts. Impacts at beaches with
protective breakwalls or jetties will be subject to the
orientation of structures as well as wind and wave direction.

For information on swim advisories or bans at Chicago beaches
visit: www.cpdbeaches.com.

&&

$$



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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