Great Lakes Forecast
Issued by NWS

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000
FZUS63 KDTX 220248
GLFSC

LAKE ST CLAIR FORECAST
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
948 PM EST WED JAN 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...LOW PRESSURE OF 29.90 INCHES CONTINUES TO WEAKEN AND
PUSH EAST TOWARD NEW YORK TONIGHT. HIGH PRESSURE OF 30.50 INCHES
THEN LOOKS TO CONTROL MUCH OF THE GREAT LAKES AND OHIO VALLEY
THURSDAY. A TIGHTENING PRESSURE GRADIENT WILL OCCUR ON FRIDAY WITH
LOW PRESSURE OVER HUDSON BAY BUFFETING THE PREVIOUS HIGH.

LCZ460-220930-
LAKE ST CLAIR-
948 PM EST WED JAN 21 2015

.REST OF TONIGHT...LIGHT AND VARIABLE WINDS. CLOUDY. A CHANCE OF
LIGHT SNOW SHOWERS THIS EVENING.
.THURSDAY...LIGHT AND VARIABLE WINDS...BECOMING NORTHWEST 5 TO
10 KNOTS BY LATE MORNING...THEN BECOMING LIGHT AND VARIABLE LATE.
MOSTLY CLOUDY. SCATTERED FLURRIES.
.THURSDAY NIGHT...LIGHT AND VARIABLE WINDS...BECOMING SOUTHWEST 5 TO
10 KNOTS LATE. PARTLY CLOUDY MAINLY BEFORE MIDNIGHT...BECOMING
MOSTLY CLOUDY OVERNIGHT.
.FRIDAY...SOUTHWEST WINDS 5 TO 10 KNOTS...INCREASING TO 10 TO
15 KNOTS. PARTLY SUNNY.
.FRIDAY NIGHT...SOUTHWEST WINDS 5 TO 10 KNOTS. PARTLY CLOUDY.
.SATURDAY...WEST WINDS 5 TO 10 KNOTS. MOSTLY CLOUDY. A CHANCE OF
LIGHT SNOW SHOWERS.
.SUNDAY...NORTHEAST WINDS 5 TO 10 KNOTS. MOSTLY CLOUDY WITH A CHANCE
OF LIGHT SNOW SHOWERS.
.MONDAY...NORTH WINDS 5 TO 10 KNOTS. PARTLY CLOUDY. A CHANCE OF
LIGHT SNOW SHOWERS.

WAVES OMITTED DUE TO ICE COVERAGE.

$$

MR

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



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