Great Lakes Forecast
Issued by NWS

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FZUS63 KDTX 271345
GLFSC

LAKE ST CLAIR FORECAST
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
945 AM EDT THU APR 27 2017

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...LOW PRESSURE OF 29.30 INCHES WILL TRACK ACROSS NORTHERN LAKE
MICHIGAN AND THE U.P. DURING THE LATE MORNING AND AFTERNOON. WEAK
HIGH PRESSURE WILL BUILD INTO LOWER MICHIGAN TONIGHT BEFORE SURFACE
HIGH PRESSURE STRENGTHENS OVER THE NORTHERN GREAT LAKES FOR THIS
WEEKEND. OVER THE SOUTHERN GREAT LAKES...A FRONTAL BOUNDARY WILL
ORGANIZED BRINGING PERIODS OF SHOWERS AND THUNDERSTORMS LATE
SATURDAY THROUGH MONDAY.

LCZ460-272015-
LAKE ST CLAIR-
945 AM EDT THU APR 27 2017

...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING...

.REST OF TODAY...SOUTH WINDS 10 TO 15 KNOTS BECOMING SOUTHWEST 15 TO
20 KNOTS WITH GUSTS TO 30 KNOTS IN THE AFTERNOON. PARTLY SUNNY.
LIGHT SHOWERS LIKELY AND A CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
WAVES 1 TO 3 FEET.
.TONIGHT...SOUTHWEST WINDS 15 TO 20 KNOTS BECOMING WEST 5 TO 10
KNOTS. PARTLY CLOUDY. WAVES 2 FEET OR LESS.
.FRIDAY...SOUTHWEST WINDS 5 TO 10 KNOTS BECOMING SOUTH 10 TO 15
KNOTS IN THE LATE MORNING AND AFTERNOON. PARTLY SUNNY. WAVES 2 FEET
OR LESS.
.FRIDAY NIGHT...SOUTH WINDS 5 TO 10 KNOTS. MOSTLY CLOUDY WITH A
CHANCE OF LIGHT SHOWERS. WAVES 2 FEET OR LESS.
.SATURDAY...NORTH WINDS 10 TO 15 KNOTS. CLOUDY WITH A CHANCE OF
LIGHT SHOWERS. WAVES 2 FEET OR LESS.
.SUNDAY...SOUTHEAST WINDS 10 TO 15 KNOTS. CLOUDY WITH SHOWERS
LIKELY. WAVES 2 FEET OR LESS.
.MONDAY...SOUTHWEST WINDS 15 TO 20 KNOTS. MOSTLY CLOUDY WITH SHOWERS
LIKELY. WAVES 1 TO 3 FEET.

$$

SF

EXPERIMENTAL MODERNIZED OPEN LAKE FORECAST IS AVAILABLE ONLINE AT
WEATHER.GOV/DTX/GLFTABLESC

GRAPHICAL MARINE FORECASTS ARE AVAILABLE AT WEATHER.GOV/GREATLAKES



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