LAKESHORE HAZARD MESSAGE
NATIONAL WEATHER SERVICE CHICAGO IL
1214 PM CDT MON JUL 11 2011

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

.A STRONG LINE OF STORMS THAT MOVED ACROSS THE LAKE THIS MORNING
CAUSED 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.

ILZ006-014-111815-
/O.CON.KLOT.LS.W.0002.000000T0000Z-110711T1800Z/
LAKE IL-COOK-
1214 PM CDT MON JUL 11 2011

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

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

* TIMING...INTO EARLY AFTERNOON.

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

LIFEGUARDS AT NORTH AVENUE BEACH IN CHICAGO ARE SEEING THE EFFECTS
OF THIS SEICHE AND ARE CAUTIONING SWIMMERS TO STAY IN KNEE DEEP OR
SHALLOWER WATER. IN ADDITION...LAKE LEVELS MEASURED AT CALUMET
HARBOR HAVE BEEN FLUCTUATING BY ALMOST 2 FEET FROM PEAK TO TROUGH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

RESIDENTS ON OR NEAR THE SHORE IN THE WARNED AREA SHOULD BE ALERT
FOR RISING WATER...AND TAKE APPROPRIATE ACTION TO PROTECT LIFE
AND PROPERTY...ESPECIALLY ALONG THE BEACHES...ON BREAKWALLS...AND
IN THE HARBORS. DO NOT VENTURE INTO THE LAKE AS THE WATER RECEDES.

&&

$$