NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
8:29 PM Saturday April 30
W2 WAVES ARE PROVIDED AS A RANGE OF SIGNIFICANT WAVE HEIGHTS, WHICH IS THE AVERAGE HEIGHT OF THE HIGHEST 1/3 OF THE WAVES, ALONG WITH THE AVERAGE HEIGHT OF THE HIGHEST 10 PERCENT OF THE WAVES WHICH WILL OCCASIONALLY BE ENCOUNTERED.W2 SYNOPSIS, HIGH PRESSURE OF 304 INCHES WILL REMAIN NORTH OF THE LAKES TONIGHT.W2 MEANWHILE AN AREA OF LOW PRESSURE OF 297 INCHES OVER THE SOUTHERN PLAINS AND MID MISSISSIPPI VALLEY WILL SHIFT NORTHEAST TONIGHT AND EVENTUALLY ACROSS SOUTHEASTERN ILLINOIS EARLY SUNDAY WHILE FILLING TO 298 INCHES.W2 THE LOW WILL THEN MOVE ACROSS THE UPPER OHIO VALLEY BY LATE SUNDAY.W2 HIGH PRESSURE OF 302 INCHES WILL THEN SETTLE ACROSS THE NORTHERN AND CENTRAL GREAT LAKES REGION ON MONDAY.W2 THE HIGH PRESSURE RIDGE WILL WEAKEN TO 300 INCHES ON TUESDAY WHILE PUSHING SOUTH INTO THE OHIO VALLEY.W2 LOW PRESSURE OF 294 INCHES WILL MOVE SOUTHEAST ACROSS ONTARIO INTO SOUTHWEST QUEBEC TUESDAY NIGHT, AS A TRAILING COLD FRONT PUSHES SOUTH ACROSS THE WESTERN LAKES.W2 LMZ261-362-364-366-563-565-567-868-010915.W2 LAKE MICHIGAN FROM SEUL CHOIX POINT TO ROCK ISLAND PASSAGE 5 NAUTICAL MILES OFFSHORE TO MID LAKE.W2 LAKE MICHIGAN SOUTH OF A LINE FROM SEUL CHOIX POINT TO THE MACKINAC BRIDGE AND NORTH OF A LINE FROM CHARLEVOIX MI TO SOUTH FOX ISLAND 5 NAUTICAL MILES OFFSHORE.W2 LAKE MICHIGAN FROM CHARLEVOIX TO POINT BETSIE MI 5 NAUTICAL MILES OFFSHORE TO MID LAKE.W2 LAKE MICHIGAN FROM POINT BETSIE TO MANISTEE MI 5 NAUTICAL MILES OFFSHORE TO MID LAKE.W2 LAKE MICHIGAN FROM ROCK ISLAND PASSAGE TO STURGEON BAY WI.W2 LAKE MICHIGAN FROM STURGEON BAY TO TWO RIVERS WI 5 NAUTICAL MILES OFFSHORE TO MID LAKE.W2 LAKE MICHIGAN FROM TWO RIVERS TO SHEBOYGAN WI 5 NAUTICAL MILES OFFSHORE TO MID LAKE.W2 LAKE MICHIGAN FROM PENTWATER TO MANISTEE MI 5 NAUTICAL MILES OFFSHORE TO MID LAKE.W2 sheboygan wi to pentwater mi north rest of tonight, northeast winds 10 to 20 knots.W2 chance of showers.W2 waves 3 to 5 feet occasionally to 7 feet.W2 sunday, northeast winds 15 to 25 knots becoming north.W2 chance of showers in the morning, then slight chance of showers in the afternoon.W2 waves 3 to 5 feet occasionally to 7 feet.W2 sunday night, north winds 10 to 20 knots diminishing to 10 to 15 knots.W2 waves 3 to 5 feet occasionally to 7 feet subsiding to 1 to 3 feet.W2 monday, north winds 10 to 15 knots becoming west.W2 waves 1 to 3 feet.W2 monday night, southwest winds 5 to 10 knots increasing to 10 to 15 knots.W2 waves 1 to 3 feet.W2 tuesday, southwest winds 10 to 20 knots.W2 chance of showers in the afternoon.W2 waves 1 to 3 feet.W2 tuesday night, west winds 10 to 20 knots becoming northwest.W2 chance of showers.W2 waves 1 to 3 feet.W2 wednesday, north winds 15 to 25 knots.W2 waves 2 to 4 feet.W2 thursday, north winds 15 to 25 knots.W2 waves 2 to 4 feet.W2