FZUS63 KDTX 021347
GLFSC 
LAKE ST CLAIR FORECAST
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
940 AM EDT THU SEP 2 2010

SYNOPSIS
WEAK HIGH PRESSURE AT 30.00 INCHES WILL QUICKLY RETREAT 
EAST TODAY AS A LOW PRESSURE SYSTEM TRACKS INTO THE NORTHERN GREAT 
LAKES BY THIS EVENING. THIS LOW...29.70 INCHES...WILL RAPIDLY DEEPEN 
TO 29.20 INCHES OVER LAKE SUPERIOR BY FRIDAY MORNING...PULLING A 
COLD FRONT THROUGH THE REGION. THIS LOW WILL THEN SLOWLY WOBBLE EAST 
THROUGH THE NORTHERN LAKES REGION...BRINGING A SECOND STRONG COLD 
FRONT THROUGH THE AREA SATURDAY MORNING.
LCZ460-022000-
LAKE ST CLAIR-
940 AM EDT THU SEP 2 2010

THIS AFTERNOON
VARIABLE WINDS 10 KNOTS OR LESS...BECOMING 
SOUTHWEST 5 TO 10 KNOTS. MOSTLY CLOUDY. SCATTERED SHOWERS AND 
THUNDERSTORMS THROUGH NOON...THEN SCATTERED SHOWERS WITH A CHANCE OF 
THUNDERSTORMS. WAVES AROUND 1 FOOT. 

TONIGHT
SOUTHEAST WINDS 5 TO 10 KNOTS...BECOMING SOUTHWEST 10 TO 
15 KNOTS. MOSTLY CLOUDY. SCATTERED SHOWERS WITH A CHANCE OF 
THUNDERSTORMS INTO THE EARLY MORNING...THEN SHOWERS LIKELY WITH A 
CHANCE OF THUNDERSTORMS. WAVES AROUND 1 FOOT. 

FRIDAY
SOUTHWEST WINDS 10 TO 15 KNOTS...BECOMING WEST 15 TO 20 
KNOTS WITH GUSTS TO 25 KNOTS. MOSTLY CLOUDY THROUGH MID 
MORNING...THEN BECOMING PARTLY SUNNY...EVENTUALLY BECOMING MOSTLY 
CLOUDY. SCATTERED SHOWERS DURING THE MORNING. WAVES 1 TO 2 FEET. 
SMALL CRAFT ADVISORY MAY BE REQUIRED.

FRIDAY NIGHT
WEST WINDS 20 TO 25 KNOTS...BECOMING SOUTHWEST 15 TO 
20 KNOTS WITH GUSTS TO 25 KNOTS. MOSTLY CLOUDY. WAVES 2 TO 3 FEET. 

SATURDAY
WEST WINDS 20 TO 25 KNOTS WITH GUSTS TO 30 
KNOTS...DIMINISHING TO 15 TO 20 KNOTS WITH GUSTS TO 25 KNOTS. MOSTLY 
CLOUDY. A CHANCE OF SPRINKLES DURING THE AFTERNOON. WAVES 2 TO 3 
FEET. 

SUNDAY
WEST WINDS 10 TO 15 KNOTS. PARTLY CLOUDY. WAVES 1 TO 2 
FEET. 

MONDAY
SOUTHWEST WINDS 5 TO 15 KNOTS. PARTLY CLOUDY. WAVES AROUND 
1 FOOT. 
  
HLO
 
EXPERIMENTAL GRAPHICAL MARINE FORECASTS ARE AVAILABLE ONLINE AT 
WEATHER.GOV/DETROIT  (ALL LOWER CASE)