PDA Weather/Marine Page URL: mobile.weather.gov
SYNOPSIS UNDER THE INFLUENCE OF A 30.5 INCH CENTER OF HIGH PRESSURE LINGERING OVER THE CANADIAN MARITIMES...THE COLD FRONT ASSOCIATED WITH A 29.1 INCH HUDSON BAY LOW WILL REMAIN STATIONARY JUST TO THE WEST OF LAKE SUPERIOR THROUGH MONDAY NIGHT...AND THEN DISSIPATE ON TUESDAY. UNTIL THAT TIME...THESE TWO SYSTEMS WILL CONTINUE TO PUMP SOUTHERLY FLOW INTO THE WESTERN LAKES. TONIGHT THIS FLOW WILL REMAIN STRONG...BUT AS THE HIGH FILLS TO 30.6 INCHES AND THE LOW WEAKENS SLIGHTLY TO 29.4 INCHES...THE GRADIENT WILL WEAKEN ON MONDAY. BY TUESDAY A 29.8 INCH LOW PRESSURE SYSTEM WILL BEGIN ENCROACHING ON THE WESTERN LAKES...SHOOTING ACROSS SOUTHERN WISCONSIN WHILE DEEPENING TO 29.6 INCHES AND CROSSING THE MACKINAC STRAITS WEDNESDAY NIGHT. THE LOW WILL THEN FILL TO 29.9 INCHES AS IT MEANDERS ACROSS THE EASTERN LAKES THROUGH FRIDAY. LSZ264-230500- LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER- 359 PM EST SUN NOV 22 2009 LATE THIS AFTERNOON SOUTH WINDS 20 TO 30 KNOTS. ISOLATED RAIN SHOWERS. WAVES 4 TO 7 FEET. TONIGHT SOUTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO 20 KNOTS AFTER MIDNIGHT. PATCHY FOG. SCATTERED RAIN SHOWERS. WAVES SUBSIDING TO 2 TO 4 FEET. MONDAY SOUTH WINDS 10 TO 20 KNOTS. PATCHY FOG IN THE MORNING. ISOLATED RAIN SHOWERS IN THE MORNING. WAVES SUBSIDING TO 1 TO 3 FEET. MONDAY NIGHT SOUTHEAST WINDS 10 TO 20 KNOTS BECOMING SOUTH 5 TO 15 KNOTS AFTER MIDNIGHT. WAVES 1 TO 3 FEET. TUESDAY SOUTHEAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO 20 KNOTS IN THE AFTERNOON. WAVES 1 TO 3 FEET. TUESDAY NIGHT SOUTHEAST WINDS 10 TO 20 KNOTS BACKING EAST AFTER MIDNIGHT. A CHANCE OF RAIN. WAVES 1 TO 3 FEET. WEDNESDAY EAST WINDS 10 TO 20 KNOTS BECOMING NORTHEAST 15 TO 25 KNOTS IN THE AFTERNOON. RAIN LIKELY. WAVES BUILDING TO 2 TO 4 FEET. WEDNESDAY NIGHT NORTH WINDS 20 TO 30 KNOTS INCREASING TO GALES TO 35 KNOTS AFTER MIDNIGHT. RAIN LIKELY...BECOMING SNOW AFTER MIDNIGHT. WAVES BUILDING TO 9 TO 12 FEET. THURSDAY NORTH GALES TO 35 KNOTS. RAIN AND SNOW LIKELY...THEN A CHANCE OF SNOW SHOWERS. WAVES BUILDING TO 12 TO 17 FEET. FRIDAY NORTH WINDS 20 TO 30 KNOTS DIMINISHING TO 10 TO 20 KNOTS. WAVES SUBSIDING TO 2 TO 4 FEET. $$
