Great Lakes Forecast
Issued by NWS

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FZUS63 KDTX 172002
GLFSC

LAKE ST CLAIR FORECAST
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
402 PM EDT SUN MAY 17 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...WEAK HIGH PRESSURE...30.10 INCHES...NOW EXTENDING ACROSS
LAKE HURON WILL DRIFT INTO ONTARIO INTO THE EVENING. STRONG LOW
PRESSURE TRACKING INTO THE NORTHERN GREAT LAKES WILL SEND THE NEXT
COLD FRONT ACROSS THE REGION MONDAY EVENING. STRONG SURFACE HIGH
PRESSURE IS THEN EXPECTED TO BUILD INTO THE GREAT LAKES REGION
THROUGHOUT MUCH OF THE UPCOMING WEEK.

LCZ460-180815-
LAKE ST CLAIR-
402 PM EDT SUN MAY 17 2015

.TONIGHT...SOUTH WINDS 5 TO 10 KNOTS. MOSTLY CLOUDY. PATCHY FOG
THROUGH MIDNIGHT. A CHANCE OF SHOWERS AND THUNDERSTORMS EARLY THIS
EVENING. SHOWERS AND THUNDERSTORMS LIKELY BY MIDNIGHT...THEN A
CHANCE OF SHOWERS AND THUNDERSTORMS LATE. WAVES 2 FEET OR LESS.
.MONDAY...SOUTHWEST WINDS 5 TO 10 KNOTS...INCREASING TO 10 TO
15 KNOTS BY LATE MORNING. PARTLY SUNNY. A CHANCE OF SHOWERS AND
THUNDERSTORMS BY EARLY AFTERNOON. WAVES 2 FEET OR LESS.
.MONDAY NIGHT...SOUTHWEST WINDS 5 TO 10 KNOTS...INCREASING TO 10 TO
15 KNOTS BY MIDNIGHT...THEN VEERING TO THE NORTHWEST AFTER MIDNIGHT.
PARTLY CLOUDY THROUGH MIDNIGHT...THEN CLEARING. WAVES 2 FEET OR
LESS.
.TUESDAY...NORTHWEST WINDS 10 TO 15 KNOTS. MOSTLY SUNNY. WAVES
2 FEET OR LESS.
.TUESDAY NIGHT...NORTHWEST WINDS 15 TO 20 KNOTS...DIMINISHING TO
10 TO 15 KNOTS AFTER MIDNIGHT. MOSTLY CLEAR. WAVES 2 FEET OR LESS.
.WEDNESDAY...NORTHWEST WINDS 10 TO 15 KNOTS...DIMINISHING TO 5 TO
10 KNOTS BY MID AFTERNOON. MOSTLY CLEAR. WAVES 2 FEET OR LESS.
.THURSDAY...NORTHWEST WINDS 5 TO 10 KNOTS. MOSTLY CLEAR. WAVES
2 FEET OR LESS.
.FRIDAY...NORTHEAST WINDS 5 TO 10 KNOTS. MOSTLY CLEAR. WAVES 2 FEET
OR LESS.

$$

CB

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



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