Great Lakes Forecast
Issued by NWS

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000
FZUS63 KDTX 210255
GLFSC

LAKE ST CLAIR FORECAST
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
955 PM EST MON FEB 20 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 LOW PRESSURE SYSTEM WILL MOVE THROUGH NORTHERN
ONTARIO TONIGHT. THIS SYSTEM WILL DROP PRESSURE TO 29.90 INCHES
OVER THE GREAT LAKES BY TUESDAY AFTERNOON...WITH AN ASSOCIATED
FRONT...AND WILL CONTINUE TO GRADUALLY DECREASE AS ANOTHER
SURFACE LOW...29.40...TRAVELS FROM THE CENTRAL PLAINS INTO THE
NORTHERN GREAT LAKES WEDNESDAY INTO THURSDAY.

LCZ460-210915-
LAKE ST CLAIR-
955 PM EST MON FEB 20 2017

.REST OF TONIGHT...SOUTHEAST WINDS 10 TO 15 KNOTS. PARTLY CLOUDY IN
THE EARLY MORNING...BECOMING MOSTLY CLOUDY. WAVES 2 FEET OR LESS.
.TUESDAY...SOUTHEAST WINDS 10 TO 15 KNOTS...BECOMING SOUTHWEST 5 TO
10 KNOTS IN THE LATE MORNING AND AFTERNOON. CLOUDY. LIGHT SHOWERS
LIKELY IN THE LATE MORNING AND AFTERNOON. WAVES 2 FEET OR LESS.
.TUESDAY NIGHT...SOUTHWEST WINDS 5 TO 10 KNOTS IN THE EVENING...
BECOMING LIGHT AND VARIABLE, THEN...BECOMING SOUTHWEST 5 TO 10 KNOTS
EARLY IN THE MORNING. PARTLY CLOUDY. A CHANCE OF LIGHT SHOWERS EARLY
IN THE EVENING. WAVES 2 FEET OR LESS.
.WEDNESDAY...SOUTHWEST WINDS 5 TO 10 KNOTS. PARTLY SUNNY. WAVES
2 FEET OR LESS.
.WEDNESDAY NIGHT...SOUTH WINDS 5 TO 10 KNOTS...BECOMING SOUTHWEST
10 TO 15 KNOTS IN THE LATE EVENING AND EARLY MORNING, THEN...
DIMINISHING TO 5 TO 10 KNOTS EARLY IN THE MORNING. PARTLY CLOUDY.
WAVES 2 FEET OR LESS.
.THURSDAY...SOUTHWEST WINDS 5 TO 10 KNOTS...VEERING TO THE NORTHWEST
IN THE AFTERNOON, THEN...VEERING TO THE NORTHEAST IN THE EVENING.
PARTLY SUNNY, THEN MOSTLY CLOUDY WITH A CHANCE OF RAIN IN THE
EVENING. WAVES 2 FEET OR LESS.
.FRIDAY...SOUTH WINDS 15 TO 20 KNOTS. RAIN WITH THUNDERSTORMS
LIKELY. WAVES 2 FEET OR LESS.
.SATURDAY...WEST WINDS 20 TO 25 KNOTS. MOSTLY CLOUDY WITH RAIN WITH
THUNDERSTORMS LIKELY. WAVES 1 TO 3 FEET. A SMALL CRAFT ADVISORY MAY
BE NEEDED.

$$

BT

EXPERIMENTAL MODERNIZED OPEN LAKE FORECAST IS AVAILABLE ONLINE AT
WEATHER.GOV/DTX/GLFTABLESC (ALL LOWER CASE)

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


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