Great Lakes Forecast
Issued by NWS

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000
FZUS63 KDTX 210746
GLFSC

LAKE ST CLAIR FORECAST
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
346 AM EDT THU MAY 21 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 REMAIN OVER THE AREA EARLY TODAY. A WEAK
TROUGH OF LOW PRESSURE...AVERAGING 29.90 INCHES...WILL THEN DROP
THROUGH THE CENTRAL GREAT LAKES LATE THIS AFTERNOON THROUGH TONIGHT
AND PULL A COLD FRONT THROUGH THE REGION. HIGH PRESSURE WILL
AGGRESSIVELY REBUILD TOMORROW AND PERSIST THROUGH SATURDAY.

LCZ460-212030-
LAKE ST CLAIR-
346 AM EDT THU MAY 21 2015

.TODAY...WEST WINDS 5 TO 10 KNOTS...INCREASING TO 10 TO 15 KNOTS
LATE. PARTLY SUNNY. WAVES 2 FEET OR LESS.
.TONIGHT...NORTHWEST WINDS 10 TO 15 KNOTS. PARTLY CLOUDY. A CHANCE
OF LIGHT SHOWERS AFTER MIDNIGHT. WAVES 2 FEET OR LESS.
.FRIDAY...NORTH WINDS 10 TO 15 KNOTS...DIMINISHING TO 5 TO 10 KNOTS
LATE. MOSTLY 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...SOUTH WINDS 5 TO 10 KNOTS. SUNNY THROUGH MID 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. MOSTLY CLOUDY WITH A
CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES 2 FEET OR LESS.

$$

HLO

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


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