Great Lakes Forecast
Issued by NWS

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FZUS63 KDTX 171942
GLFSC

LAKE ST CLAIR FORECAST
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
342 PM EDT WED MAY 17 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...A STATIONARY FRONT WILL EXTEND SOUTHWEST FROM LOW
PRESSURE TRACKING ACROSS QUEBEC TO A SECOND LOW ORGANIZING OVER THE
CENTRAL PLAINS. THIS LOW...29.30 INCHES...WILL TRACK ALONG THE
FRONTAL BOUNDARY TONIGHT INTO THURSDAY...REACHING NORTHERN LOWER
MICHIGAN BY THURSDAY AFTERNOON. THE LOW WILL CONTINUE ON THROUGH
ONTARIO PULLING A COLD FRONT THROUGH THE EASTERN GREAT LAKES
THURSDAY AFTERNOON. HIGH PRESSURE...30.40 INCHES...WILL THEN BUILD
INTO AREA THURSDAY NIGHT INTO FRIDAY.

LCZ460-180815-
LAKE ST CLAIR-
342 PM EDT WED MAY 17 2017

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

.TONIGHT...SOUTHWEST WINDS 15 TO 20 KNOTS WITH GUSTS TO 25 KNOTS
EARLY BECOMING SOUTH 10 TO 15 KNOTS IN THE LATE EVENING AND
OVERNIGHT. PARTLY CLOUDY. A CHANCE OF SHOWERS AND THUNDERSTORMS EARLY
IN THE MORNING. WAVES 1 TO 3 FEET.
.THURSDAY...SOUTH WINDS 10 TO 15 KNOTS BECOMING SOUTHWEST 20 TO 25
KNOTS WITH GUSTS TO 30 KNOTS. PARTLY SUNNY. A CHANCE OF SHOWERS AND
THUNDERSTORMS EARLY IN THE MORNING. A CHANCE OF SHOWERS AND
THUNDERSTORMS LATE IN THE AFTERNOON. WAVES 1 TO 3 FEET.
.THURSDAY NIGHT...WEST WINDS 15 TO 20 KNOTS BECOMING NORTHWEST 10 TO
15 KNOTS IN THE LATE EVENING AND OVERNIGHT. PARTLY CLOUDY. A CHANCE
OF SHOWERS AND THUNDERSTORMS EARLY IN THE EVENING. WAVES 2 FEET OR
LESS.
.FRIDAY...NORTH WINDS 10 TO 15 KNOTS. PARTLY SUNNY. WAVES 2 FEET OR
LESS.
.FRIDAY NIGHT...NORTH WINDS 10 TO 15 KNOTS BECOMING NORTHEAST 5 TO
10 KNOTS AFTER MIDNIGHT. PARTLY CLOUDY. WAVES 2 FEET OR LESS.
.SATURDAY...EAST WINDS 10 TO 15 KNOTS. PARTLY SUNNY BECOMING MOSTLY
CLOUDY. A CHANCE OF SHOWERS AND THUNDERSTORMS LATE IN THE EVENING.
WAVES 2 FEET OR LESS.
.SUNDAY...WEST WINDS 10 TO 15 KNOTS. MOSTLY CLOUDY WITH SHOWERS
LIKELY AND A CHANCE OF THUNDERSTORMS. WAVES 2 FEET OR LESS.
.MONDAY...WEST WINDS 10 TO 15 KNOTS. PARTLY CLOUDY. WAVES 2 FEET OR
LESS.

$$

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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