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. LSZ263-231045- LAKE SUPERIOR FROM SAXON HARBOR WI TO UPPER ENTRANCE TO PORTAGE CANAL MI 5NM OFF SHORE TO THE US/CANADIAN BORDER INCLUDING ISLE ROYALE NATIONAL PARK- 933 PM EST SUN NOV 22 2009 REST OF TONIGHT SOUTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO 15 KNOTS AFTER MIDNIGHT. PATCHY FOG. SCATTERED RAIN SHOWERS. WAVES 2 TO 4 FEET SUBSIDING TO 1 TO 3 FEET. MONDAY SOUTH WINDS 5 TO 15 KNOTS BACKING SOUTHEAST IN THE AFTERNOON. PATCHY FOG IN THE MORNING. ISOLATED RAIN SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET. MONDAY NIGHT SOUTHEAST WINDS 5 TO 15 KNOTS VEERING SOUTH AFTER MIDNIGHT. WAVES BUILDING TO 1 TO 3 FEET...THEN SUBSIDING TO CALM TO 2 FEET. TUESDAY SOUTHEAST WINDS 5 TO 15 KNOTS BACKING EAST IN THE AFTERNOON. A SLIGHT CHANCE OF RAIN IN THE AFTERNOON. WAVES CALM TO 2 FEET. TUESDAY NIGHT EAST WINDS 5 TO 15 KNOTS. A CHANCE OF RAIN. WAVES CALM TO 2 FEET. WEDNESDAY NORTHEAST WINDS 5 TO 15 KNOTS BECOMING NORTH 10 TO 20 KNOTS IN THE AFTERNOON. RAIN LIKELY. WAVES BUILDING TO 1 TO 3 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 8 TO 11 FEET. THURSDAY NORTH GALES TO 35 KNOTS. SNOW...POSSIBLY MIXED WITH RAIN...THEN A CHANCE OF SNOW SHOWERS. WAVES BUILDING TO 10 TO 14 FEET. FRIDAY NORTH WINDS 20 TO 30 KNOTS BECOMING NORTHWEST 10 TO 20 KNOTS. WAVES SUBSIDING TO 2 TO 4 FEET. $$
