000
FZUS63 KDTX 221350
GLFSC

LAKE ST CLAIR FORECAST
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
942 AM EDT WED MAY 22 2013

.SYNOPSIS...A LARGE LOW PRESSURE SYSTEM...AVERAGING 29.60
INCHES...OVER NORTHERN IOWA WILL SLOWLY TRACK EAST THROUGH CENTRAL
MICHIGAN TODAY...THEN HEAD TOWARDS THE ST. LAWRENCE SEAWAY TONIGHT.
THIS LOW WILL BRING SEVERAL ROUNDS OF SHOWERS AND THUNDERSTORMS
THROUGH TONIGHT. THE COLD FRONT ASSOCIATED WITH THIS LOW WILL PUSH
THROUGH THE SOUTHERN GREAT LAKES THURSDAY...ALLOWING HIGH PRESSURE
TO BUILD IN ACROSS THE CENTRAL GREAT LAKES ON FRIDAY.

LCZ460-222000-
LAKE ST CLAIR-
942 AM EDT WED MAY 22 2013

.REST OF TODAY...SOUTH WINDS 5 TO 10 KNOTS...INCREASING TO 10 TO 15
KNOTS BY AFTERNOON. SHOWERS AND THUNDERSTORMS BY MID AFTERNOON.
WAVES 2 FEET OR LESS.
.TONIGHT...SOUTHWEST WINDS 5 TO 10 KNOTS. LIGHT SHOWERS WITH
THUNDERSTORMS LIKELY THROUGH MIDNIGHT...THEN PARTLY CLOUDY WITH A
CHANCE OF LIGHT SHOWERS AFTER MIDNIGHT. WAVES 2 FEET OR LESS.
.THURSDAY...WEST WINDS 5 TO 10 KNOTS...BECOMING NORTH 10 TO 15 KNOTS
BY MID AFTERNOON. LIGHT SHOWERS LIKELY. MOSTLY CLOUDY. WAVES 2 FEET
OR LESS.
.THURSDAY NIGHT...NORTH WINDS 10 TO 15 KNOTS...DIMINISHING TO 5 TO
10 KNOTS AFTER MIDNIGHT. MOSTLY CLEAR. WAVES 1 TO 3 FEET.
.FRIDAY...NORTH WINDS 10 TO 15 KNOTS...DIMINISHING TO 5 TO 10 KNOTS
BY MID AFTERNOON. MOSTLY CLEAR. WAVES 2 FEET OR LESS.
.SATURDAY...LIGHT AND VARIABLE WINDS. MOSTLY CLEAR. WAVES 2 FEET OR
LESS.
.SUNDAY...LIGHT AND VARIABLE WINDS. MOSTLY CLEAR. WAVES 2 FEET OR
LESS.

$$

MM

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)