Great Lakes Forecast
Issued by NWS

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000
FZUS63 KDTX 210203
GLFSC

LAKE ST CLAIR FORECAST
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
1003 PM EDT WED AUG 20 2014

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...A SLOW MOVING AND WEAKENING LOW PRESSURE SYSTEM...OF
29.60 INCHES...WILL DRIFT INTO NORTHERN ONTARIO TONIGHT. A SECOND
WEAK SURFACE LOW OF 29.80 INCHES WILL THEN PUSH RAPIDLY INTO THE
NORTHERN GREAT LAKES FRIDAY ON THE HEELS OF THE FIRST ONE. A
GENERAL SURFACE TROUGH WILL PERSIST OVER THE GREAT LAKES THROUGH
THE WEEKEND.

LCZ460-210830-
LAKE ST CLAIR-
1003 PM EDT WED AUG 20 2014

.REST OF TONIGHT...LIGHT AND VARIABLE WINDS. PATCHY FOG LATE. WAVES
NEARLY CALM.
.THURSDAY...LIGHT AND VARIABLE WINDS. PATCHY FOG EARLY. A CHANCE OF
SHOWERS AND THUNDERSTORMS LATE. PARTLY SUNNY. WAVES NEARLY CALM.
.THURSDAY NIGHT...LIGHT AND VARIABLE WINDS. MOSTLY CLOUDY WITH A
CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES NEARLY CALM.
.FRIDAY...LIGHT AND VARIABLE WINDS...BECOMING SOUTHEAST 5 TO
10 KNOTS BY LATE MORNING. A CHANCE OF SHOWERS AND THUNDERSTORMS
THROUGH EARLY AFTERNOON. MOSTLY CLOUDY. WAVES 2 FEET OR LESS.
.FRIDAY NIGHT...SOUTHEAST WINDS 5 TO 10 KNOTS. PARTLY CLOUDY. WAVES
2 FEET OR LESS.
.SATURDAY...SOUTHEAST WINDS 5 TO 10 KNOTS. PARTLY CLOUDY. WAVES
2 FEET OR LESS.
.SUNDAY...SOUTHEAST WINDS 5 TO 10 KNOTS. A CHANCE OF SHOWERS AND
THUNDERSTORMS. PARTLY CLOUDY. WAVES 2 FEET OR LESS.
.MONDAY...SOUTH WINDS 5 TO 10 KNOTS. A CHANCE OF SHOWERS AND
THUNDERSTORMS. PARTLY CLOUDY. WAVES 2 FEET OR LESS.

$$

BT

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







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