Great Lakes Forecast
Issued by NWS

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FZUS63 KDTX 201934
GLFSC

LAKE ST CLAIR FORECAST
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
331 PM EDT SUN APR 20 2014

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...29.90 INCHES...WILL DEVELOP OVER THE
UPPER MIDWEST TONIGHT AND MOVE ACROSS LOWER MICHIGAN MONDAY
EVENING...DEEPENING TO 29.70 INCHES. THE LOW WILL CONTINUE TO DEEPEN
AS IT ADVANCES INTO NEW ENGLAND ON TUESDAY. HIGH PRESSURE WILL BUILD
INTO THE GREAT LAKES FROM THE WEST ON TUESDAY AND WILL BE CENTERED
OVER LAKE HURON ON WEDNESDAY. THE HIGH WILL EXIT TO THE EAST BY THE
END OF THE WEEK AS A LOW PRESSURE SYSTEM MOVES IN FROM THE WEST.

LCZ460-210800-
LAKE ST CLAIR-
331 PM EDT SUN APR 20 2014

.TONIGHT...SOUTH WINDS 5 TO 10 KNOTS IN THE EVENING...BECOMING LIGHT
AND VARIABLE OVERNIGHT. MOSTLY CLEAR. WAVES 2 FEET OR LESS.
.MONDAY...LIGHT AND VARIABLE WINDS...BECOMING SOUTHWEST 5 TO
10 KNOTS BY AFTERNOON. PARTLY SUNNY. WAVES 2 FEET OR LESS.
.MONDAY NIGHT...SOUTHWEST WINDS 5 TO 10 KNOTS...BECOMING NORTH 10 TO
15 KNOTS AFTER MIDNIGHT. MOSTLY CLOUDY WITH LIGHT SHOWERS LIKELY AND
A CHANCE OF THUNDERSTORMS. WAVES 2 FEET OR LESS.
.TUESDAY...NORTHWEST WINDS 10 TO 15 KNOTS...INCREASING TO 15 TO
20 KNOTS BY MID AFTERNOON. PARTLY SUNNY. WAVES 2 FEET OR LESS.
.TUESDAY NIGHT...NORTH WINDS 10 TO 15 KNOTS. MOSTLY CLEAR. WAVES
2 FEET OR LESS.
.WEDNESDAY...NORTH WINDS 5 TO 10 KNOTS...VEERING TO THE NORTHEAST
THROUGH MIDNIGHT. MOSTLY CLEAR. WAVES 2 FEET OR LESS.
.THURSDAY...SOUTHEAST WINDS 10 TO 15 KNOTS. A CHANCE OF LIGHT
SHOWERS. PARTLY CLOUDY. WAVES 2 FEET OR LESS.
.FRIDAY...WEST WINDS 10 TO 15 KNOTS. A CHANCE OF LIGHT SHOWERS.
PARTLY CLOUDY. WAVES 1 TO 3 FEET.

$$

CB/SC

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






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