000
FZUS63 KDTX 211321
GLFSC

LAKE ST CLAIR FORECAST
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
916 AM EDT TUE MAY 21 2013

.SYNOPSIS...A LARGE LOW PRESSURE SYSTEM...AVERAGING 29.40
INCHES...WILL STALL OVER THE NORTHERN PLAINS BRINGING SEVERAL
ROUNDS OF SHOWERS AND THUNDERSTORMS THROUGH WEDNESDAY. THIS LOW WILL
PASS THROUGH THE SOUTHERN GREAT LAKES ON THURSDAY...ALLOWING HIGH
PRESSURE TO BUILD BACK IN FROM THE NORTH ON FRIDAY.

LCZ460-212000-
LAKE ST CLAIR-
916 AM EDT TUE MAY 21 2013

.REST OF TODAY...SOUTHWEST WINDS 5 TO 10 KNOTS...INCREASING TO 10 TO
15 KNOTS LATE. PARTLY SUNNY WITH A CHANCE OF SHOWERS AND
THUNDERSTORMS. WAVES 2 FEET OR LESS.
.TONIGHT...SOUTHWEST WINDS 5 TO 10 KNOTS THROUGH MIDNIGHT...BECOMING
LIGHT AND VARIABLE OVERNIGHT. A CHANCE OF SHOWERS AND THUNDERSTORMS
THROUGH MIDNIGHT...THEN SHOWERS AND THUNDERSTORMS LIKELY AFTER
MIDNIGHT. PARTLY CLOUDY. WAVES 2 FEET OR LESS.
.WEDNESDAY...SOUTH WINDS 5 TO 10 KNOTS...INCREASING TO 10 TO
15 KNOTS BY MID AFTERNOON. MOSTLY CLOUDY WITH SHOWERS AND
THUNDERSTORMS LIKELY. WAVES 2 FEET OR LESS.
.WEDNESDAY NIGHT...WEST WINDS 5 TO 10 KNOTS. SHOWERS LIKELY. MOSTLY
CLOUDY THROUGH MIDNIGHT...BECOMING PARTLY CLOUDY OVERNIGHT. WAVES
2 FEET OR LESS.
.THURSDAY...NORTH WINDS 5 TO 10 KNOTS...INCREASING TO 10 TO 15 KNOTS
BY MID AFTERNOON. MOSTLY CLOUDY WITH A CHANCE OF LIGHT SHOWERS.
WAVES 2 FEET OR LESS.
.FRIDAY...NORTHEAST WINDS 5 TO 10 KNOTS. MOSTLY CLEAR. WAVES 2 FEET
OR LESS.
.SATURDAY...LIGHT AND VARIABLE WINDS. PARTLY CLOUDY. WAVES 2 FEET OR
LESS.

$$

MR

WAVES ARE THE SIGNIFICANT WAVE HEIGHT - THE AVERAGE OF THE HIGHEST
1/3 OF THE WAVE SPECTRUM. MAXIMUM WAVE HEIGHT IS THE HIGHEST 1/20
WAVE HEIGHT.

EXPERIMENTAL GRAPHICAL MARINE FORECASTS ARE AVAILABLE ONLINE AT
WEATHER.GOV/DETROIT (ALL LOWER CASE)