Great Lakes Forecast
Issued by NWS

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary Off
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29

000
FZUS63 KDTX 220201
GLFSC

LAKE ST CLAIR FORECAST
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
1001 PM EDT THU APR 21 2016

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 BROAD AREA OF LOW PRESSURE...AVERAGING 29.80 INCHES...
WILL MOVE ACROSS THE CENTRAL GREAT LAKES TONIGHT. THIS SYSTEM WILL
PRODUCE A PATTERN OF SHOWERS THAT WILL AFFECT ALL MARINE AREAS WITH
A CHANCE OF THUNDERSTORMS MAINLY SOUTH OF SAGINAW BAY. A COLD FRONT
WILL FOLLOW THE LOW OVER LAKE HURON AND LOWER MICHIGAN BY FRIDAY
MORNING AND BRING MODERATE WIND AND WAVES THROUGH FRIDAY NIGHT.
COOLER HIGH PRESSURE....AROUND 30.30 INCHES...ARRIVES LATE FRIDAY
NIGHT/EARLY SATURDAY MORNING JUST IN TIME FOR THE WEEKEND.

LCZ460-220815-
LAKE ST CLAIR-
1001 PM EDT THU APR 21 2016

.REST OF TONIGHT...SOUTH WINDS 5 TO 10 KNOTS BY MIDNIGHT...BECOMING
LIGHT AND VARIABLE OVERNIGHT. MOSTLY CLOUDY. LIGHT SHOWERS LIKELY
AND A CHANCE OF THUNDERSTORMS BY MIDNIGHT...THEN A CHANCE OF LIGHT
SHOWERS AFTER MIDNIGHT. WAVES NEARLY CALM.
.FRIDAY...NORTHWEST WINDS 5 TO 10 KNOTS...VEERING TO THE NORTH BY
LATE MORNING...THEN INCREASING TO 10 TO 15 KNOTS BY MID AFTERNOON.
MOSTLY CLOUDY. A CHANCE OF LIGHT SHOWERS EARLY. WAVES 2 FEET OR
LESS.
.FRIDAY NIGHT...NORTH WINDS 15 TO 20 KNOTS...DIMINISHING TO 5 TO
10 KNOTS OVERNIGHT. MOSTLY CLEAR. WAVES 2 FEET OR LESS.
.SATURDAY...NORTHEAST WINDS 5 TO 10 KNOTS. MOSTLY SUNNY. WAVES
2 FEET OR LESS.
.SATURDAY NIGHT...EAST WINDS 5 TO 10 KNOTS. MOSTLY CLEAR. WAVES
2 FEET OR LESS.
.SUNDAY...SOUTH WINDS 5 TO 10 KNOTS. PARTLY SUNNY THROUGH MID
AFTERNOON...BECOMING MOSTLY CLOUDY. A CHANCE OF LIGHT SHOWERS
THROUGH MIDNIGHT. WAVES 2 FEET OR LESS.
.MONDAY...WEST WINDS 10 TO 15 KNOTS. MOSTLY CLOUDY WITH LIGHT
SHOWERS LIKELY. WAVES 2 FEET OR LESS.
.TUESDAY...NORTH WINDS 10 TO 15 KNOTS. PARTLY CLOUDY. LIGHT SHOWERS
LIKELY. WAVES 2 FEET OR LESS.

$$

MR

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



USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.