Great Lakes Forecast
Issued by NWS

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FZUS63 KDTX 210143
GLFSC

LAKE ST CLAIR FORECAST
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
943 PM EDT WED MAY 20 2015

WAVES ARE THE SIGNIFICANT WAVE HEIGHT - THE AVERAGE OF THE HIGHEST
1/3 OF THE WAVE SPECTRUM. OCCASIONAL WAVE HEIGHT IS THE AVERAGE OF
THE HIGHEST 1/10 OF THE WAVE SPECTRUM.

.SYNOPSIS...SURFACE HIGH PRESSURE WILL PERSIST ACROSS THE AREA THIS
EVENING AND INTO THURSDAY. A WEAK TROUGH OF LOW
PRESSURE...AVERAGING 29.90 INCHES...ALONG WITH A COLD FRONT WILL
PUSH ACROSS THE REGION LATE THURSDAY INTO THURSDAY NIGHT BRINGING
A CHANGE IN THE WINDS FROM SOUTHWEST TO NORTHWEST.

LCZ460-210815-
LAKE ST CLAIR-
943 PM EDT WED MAY 20 2015

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

$$

SC

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



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