Coastal Waters Forecast
Issued by NWS Miami, FL

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FZUS52 KMFL 211403
CWFMFL

Coastal Waters Forecast for South Florida
National Weather Service Miami FL
1002 AM EDT Wed Apr 21 2021

Atlantic coastal waters from Jupiter Inlet to Ocean Reef out to 60
nm and Gulf coastal waters from East Cape Sable to Chokoloskee out
20 nm and Chokoloskee to Bonita Beach out 60 nm...including the
waters of Biscayne Bay and Lake Okeechobee.

Seas are provided as a range of the average height of the highest 1/3
of the waves...along with the occasional height of the average highest
10 percent of the waves.

AMZ600-GMZ606-220300-
Synopsis for Jupiter Inlet to Ocean Reef FL out to 60 nm and for East
Cape Sable to Bonita Beach FL out to 60 nm-
1002 AM EDT Wed Apr 21 2021

.SYNOPSIS...

A weak frontal boundary will move southeastwards across the area
today. Gusty winds and heavy rainfall will accompany showers and
thunderstorms today which may allow for locally hazardous marine
conditons. Behind the passage of the front, potential cautionary
conditions for small craft operators, particularly in the gulf
waters. Cautionary conditions are also possible this weekend as
easterly winds strengthen across area waters.

.GULF STREAM HAZARDS...Showers and thunderstorms with gusty winds,
lightning, waterspouts and locally higher seas will be possible.

The approximate location of the west wall of the Gulf Stream as of
Apr 20, 2021 at 1200 UTC...

 11 nautical miles southeast of Fowey Rocks.
 10 nautical miles east northeast of Port Everglades.
  1 nautical miles east of Lake Worth.
  3 nautical miles east northeast of Jupiter Inlet.

This data courtesy of the Naval Oceanographic Office.

$$

AMZ650-670-220300-
Coastal waters from Jupiter Inlet to Deerfield Beach FL out
20 NM-
Waters from Jupiter Inlet to Deerfield Beach FL from 20 to 60 NM-
1002 AM EDT Wed Apr 21 2021

.REST OF TODAY...West southwest winds 5 to 10 knots. Seas around
2 feet. Period 3 seconds. Intracoastal waters a light chop.
Chance of showers in the morning. Chance of thunderstorms
. Showers.
.TONIGHT...West northwest winds 5 to 10 knots becoming north
10 to 15 knots after midnight. Seas around 2 feet along the
coast and 2 to 4 feet with occasional to 5 feet in the Gulf
Stream. Period 5 seconds. Intracoastal waters a light chop.
Chance of showers and thunderstorms late in the evening. Slight
chance of showers and thunderstorms after midnight.
.THURSDAY...Northeast winds 10 to 15 knots. Seas 2 to 3 feet
along the coast and 3 to 5 feet with occasional to 6 feet in the
Gulf Stream. Period 6 seconds. Intracoastal waters a moderate
chop. Slight chance of showers. Slight chance of
thunderstorms.
.THURSDAY NIGHT...East northeast winds 10 to 15 knots along the
coast to east northeast around 15 knots in the Gulf Stream. Seas
2 to 3 feet along the coast and 3 to 5 feet with occasional to
6 feet in the Gulf Stream. Period 7 seconds. Intracoastal waters
a moderate chop.
.FRIDAY...East winds around 15 knots. Seas 3 to 5 feet with
occasional seas to 6 feet. Intracoastal waters a moderate chop.
Slight chance of showers.
.FRIDAY NIGHT...East southeast winds 15 to 20 knots. Seas 2 to
4 feet with occasional seas to 5 feet. Intracoastal waters
choppy in exposed areas.
.SATURDAY...South southeast winds 15 to 20 knots. Seas 2 to
4 feet with occasional seas to 5 feet. Intracoastal waters a
moderate chop. Chance of showers and slight chance of
thunderstorms.
.SATURDAY NIGHT...Southwest winds 10 to 15 knots along the coast
to south southwest 10 to 15 knots in the Gulf Stream. Seas 2 to
3 feet. Intracoastal waters a light chop. Chance of showers late
in the evening. Slight chance of thunderstorms through the
night. Slight chance of showers after midnight.
.SUNDAY...Southwest winds 10 to 15 knots. Seas around 2 feet.
Intracoastal waters a light chop. Chance of showers and slight
chance of thunderstorms.

$$

AMZ651-671-220300-
Coastal waters from Deerfield Beach to Ocean Reef FL out 20 NM-
Waters from Deerfield Beach to Ocean Reef FL from 20 to 60 NM
excluding the territorial waters of Bahamas-
1002 AM EDT Wed Apr 21 2021

.REST OF TODAY...West southwest winds around 10 knots. Seas
around 2 feet. Period 4 seconds. Intracoastal waters a light
chop. Showers likely and chance of thunderstorms through the
day.
.TONIGHT...North northwest winds 5 to 15 knots. Along the coast,
seas around 2 feet. In the Gulf Stream, seas around 2 feet
building to 2 to 4 feet with occasional seas to 5 feet after
midnight. Period 3 seconds. Intracoastal waters a light chop.
Chance of showers and thunderstorms late in the evening, then
slight chance of showers and thunderstorms after midnight.
.THURSDAY...Northeast winds 10 to 15 knots. Seas around 2 feet
along the coast and 2 to 4 feet with occasional to 5 feet in the
Gulf Stream. Period 5 seconds. Intracoastal waters a moderate
chop. Chance of showers. Slight chance of
thunderstorms.
.THURSDAY NIGHT...East northeast winds around 15 knots. Seas
2 to 3 feet along the coast and 3 to 5 feet with occasional to
6 feet in the Gulf Stream. Period 6 seconds. Intracoastal waters
a moderate chop.
.FRIDAY...East winds around 15 knots. Seas 2 to 3 feet along the
coast and 3 to 5 feet with occasional to 6 feet in the Gulf
Stream. Intracoastal waters a moderate chop. Slight chance of
showers.
.FRIDAY NIGHT...East southeast winds 15 to 20 knots. Seas 3 to
5 feet with occasional seas to 6 feet. Intracoastal waters
choppy in exposed areas.
.SATURDAY...South southeast winds 10 to 15 knots with gusts to
around 20 knots. Seas 2 to 4 feet with occasional seas to
5 feet. Intracoastal waters a light chop.
.SATURDAY NIGHT...South winds 10 to 15 knots. Seas 2 to 3 feet.
Intracoastal waters a light chop.
.SUNDAY...Southwest winds around 10 knots. Seas around 2 feet.
Intracoastal waters a light chop. Chance of showers and slight
chance of thunderstorms.

$$

AMZ630-220300-
Biscayne Bay-
1002 AM EDT Wed Apr 21 2021

.REST OF TODAY...West southwest winds around 10 knots. Bay
waters a light chop. Showers likely in the morning. Chance of
thunderstorms. Chance of showers.
.TONIGHT...West northwest winds 5 to 10 knots becoming north
northwest after midnight. Bay waters a light chop. Slight chance
of showers and thunderstorms late in the evening.
.THURSDAY...Northeast winds around 10 knots. Bay waters a light
chop. Chance of showers. Chance of
thunderstorms.
.THURSDAY NIGHT...East northeast winds 10 to 15 knots. Bay
waters a moderate chop.
.FRIDAY...East winds around 15 knots. Bay waters a moderate
chop. Slight chance of showers.
.FRIDAY NIGHT...Southeast winds 10 to 15 knots. Bay waters a
moderate chop.
.SATURDAY...South southeast winds 10 to 15 knots with gusts to
around 20 knots. Bay waters a moderate chop.
.SATURDAY NIGHT...South winds 5 to 10 knots. Bay waters a light
chop.
.SUNDAY...Southwest winds 5 to 10 knots. Bay waters a light
chop. Slight chance of showers and thunderstorms.

$$

GMZ656-657-220300-
Coastal waters from Chokoloskee to Bonita Beach FL out 20 NM-
Coastal waters from East Cape Sable to Chokoloskee FL out 20 NM-
1002 AM EDT Wed Apr 21 2021

.REST OF TODAY...West northwest winds 10 to 15 knots. Seas
around 2 feet. Period 3 seconds. Bay and inland waters a
moderate chop. Showers likely in the morning. Chance of
thunderstorms. Chance of showers.
.TONIGHT...North winds 10 to 15 knots with gusts to around
20 knots. Seas 2 to 3 feet. Period 4 seconds. Bay and inland
waters a light chop.
.THURSDAY...North northeast winds 5 to 15 knots becoming
northwest 5 to 10 knots. Seas 2 to 3 feet. Period 5 seconds. Bay
and inland waters a light chop. Chance of showers and slight
chance of thunderstorms.
.THURSDAY NIGHT...East northeast winds 5 to 10 knots nearshore
and east northeast 10 to 15 knots with gusts to around 20 knots
offshore. Seas around 2 feet. Period 6 seconds. Bay and inland
waters a light chop.
.FRIDAY...East southeast winds 10 to 15 knots nearshore and
southeast 10 to 15 knots offshore. Seas around 2 feet. Bay and
inland waters a light chop.
.FRIDAY NIGHT...Southeast winds 10 to 15 knots with gusts to
around 20 knots. Seas around 2 feet nearshore and 2 to 3 feet
offshore. Bay and inland waters a light chop.
.SATURDAY...South winds 10 to 15 knots with gusts to around
20 knots. Seas 2 to 3 feet. Bay and inland waters a light chop.
.SATURDAY NIGHT...South southwest winds 5 to 10 knots. Seas
around 2 feet. Bay and inland waters a light chop.
.SUNDAY...West northwest winds 5 to 10 knots. Seas less than
2 feet. Bay and inland waters a light chop.

$$

GMZ676-220300-
Waters from Chokoloskee to Bonita Beach FL from 20 to 60 NM-
1002 AM EDT Wed Apr 21 2021

.REST OF TODAY...North northwest winds 10 to 15 knots. Seas 2 to
3 feet. Period 6 seconds. Showers likely and chance of
thunderstorms in the morning.
.TONIGHT...North winds 10 to 15 knots with gusts to around
20 knots. Seas 2 to 3 feet. Period 5 seconds.
.THURSDAY...North winds 5 to 15 knots. Seas 2 to 3 feet. Period
5 seconds.
.THURSDAY NIGHT...East northeast winds 10 to 15 knots with gusts
to around 20 knots. Seas 2 to 3 feet. Period 6 seconds.
.FRIDAY...Southeast winds 10 to 15 knots. Seas 2 to 3 feet.
.FRIDAY NIGHT...Southeast winds 10 to 15 knots. Seas 2 to
3 feet.
.SATURDAY...South winds 10 to 15 knots. Seas 2 to 3 feet.
.SATURDAY NIGHT...Southwest winds 5 to 10 knots. Seas around
2 feet.
.SUNDAY...West northwest winds 5 to 10 knots. Seas around
2 feet.

$$

AMZ610-220300-
Lake Okeechobee-
1002 AM EDT Wed Apr 21 2021

.REST OF TODAY...West northwest winds 5 to 10 knots. Lake waters
a light chop. Chance of showers and thunderstorms through the
day.
.TONIGHT...North northwest winds 5 to 15 knots. Lake waters a
moderate chop.
.THURSDAY...Northeast winds 5 to 15 knots. Lake waters a
moderate chop.
.THURSDAY NIGHT...East northeast winds 10 to 15 knots. Lake
waters a moderate chop.
.FRIDAY...East winds 10 to 15 knots. Lake waters a moderate
chop. Slight chance of showers.
.FRIDAY NIGHT...Southeast winds 10 to 15 knots. Lake waters a
moderate chop.
.SATURDAY...South winds 5 to 10 knots. Lake waters a light chop.
Slight chance of showers and thunderstorms.
.SATURDAY NIGHT...Southwest winds 5 to 10 knots. Lake waters a
light chop. Slight chance of showers after midnight.
.SUNDAY...West winds 5 to 10 knots. Lake waters a light chop.
Chance of showers and slight chance of thunderstorms through the
day.

$$



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