July 11: Lakeshore Flood Warning (Possible Seiche)- Illinois Side of Lake Michigan

...SEICHE WARNING FOR THE ILLINOIS SHORE OF LAKE MICHIGAN UNTIL
100 PM CDT...

.A STRONG LINE OF STORMS MOVING ACROSS THE LAKE THIS MORNING
LIKELY WILL CAUSE WATER TO PILE UP ALONG THE MICHIGAN AND INDIANA
SHORES AND BE REFLECTED BACK TOWARD THE ILLINOIS SHORELINE. THIS
PHENOMENA IS KNOWN AS A SEICHE.

ILZ006-014-111800-
/O.NEW.KLOT.LS.W.0002.110711T1431Z-110711T1800Z/
LAKE IL-COOK-
931 AM CDT MON JUL 11 2011

...LAKESHORE FLOOD WARNING IN EFFECT UNTIL 1 PM CDT THIS
AFTERNOON...

THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A LAKESHORE
FLOOD WARNING...WHICH IS IN EFFECT UNTIL 1 PM CDT THIS
AFTERNOON...IN ANTICIPATION OF A POSSIBLE SEICHE.

* LAKE SHORE FLOODING...ALONG THE ILLINOIS SHORELINE OF LAKE MICHIGAN.

* TIMING...THROUGH THE MORNING INTO THE EARLY AFTERNOON.

* IMPACTS...WATER LEVELS ARE EXPECTED TO RISE AND FALL...PERHAPS
  BY 2 OR MORE FEET...DURING THE PERIOD OF THE WARNING.