057
FZUS51 KLWX 300408
CWFLWX
COASTAL WATERS FORECAST
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
1207 AM EDT THU APR 30 2026
TIDAL POTOMAC RIVER AND MARYLAND PORTION OF CHESAPEAKE BAY.
FORECASTS OF WAVE HEIGHTS DO NOT INCLUDE EFFECTS OF WIND DIRECTION
RELATIVE TO TIDAL CURRENTS. EXPECT HIGHER WAVES WHEN WINDS ARE
BLOWING AGAINST THE TIDAL FLOW. WAVES FLAT WHERE WATERS ARE ICED OVER.
ANZ500-302000-
1207 AM EDT THU APR 30 2026
.SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY...
A COLD FRONT WILL CROSS THE WATERS THIS EVENING. THIS MAY BRING SOME
STRONG TO SEVERE THUNDERSTORMS TO THE WATERWAYS. BEHIND THE COLD
FRONT, A TROUGH OF LOW PRESSURE LINGERS THROUGH THE REMAINDER OF THE
WEEK. A COASTAL LOW TRACKS OFF THE CAROLINAS ON SATURDAY BEFORE
HIGH PRESSURE BUILDS TO THE SOUTHWEST TO FINISH THE WEEKEND. SMALL
CRAFT ADVISORIES WILL BE LIKELY THURSDAY NIGHT AND POSSIBLE
SATURDAY NIGHT INTO SUNDAY.
ANZ535-302000-
TIDAL POTOMAC FROM KEY BRIDGE TO INDIAN HEAD-
1207 AM EDT THU APR 30 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING
OVERNIGHT
NW WINDS 15 KT WITH GUSTS TO 25 KT. WAVES 1 FT.
THU...NW WINDS 10 TO 15 KT. GUSTS UP TO 25 KT
DIMINISHING TO
20 KT IN THE LATE MORNING AND AFTERNOON. WAVES 1 FT.
THU NIGHT
NW WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE EVENING.
WAVES 1 FT.
FRI
W WINDS AROUND 5 KT. WAVES 1 FT.
FRI NIGHT
NW WINDS AROUND 5 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
SAT
N WINDS AROUND 5 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
SAT NIGHT
NW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
SUN...NW WINDS 10 TO 15 KT
BECOMING SW AROUND 5 KT AFTER
MIDNIGHT. WAVES 1 FT.
MON
SW WINDS 10 TO 15 KT. WAVES 1 FT.
ANZ536-302000-
TIDAL POTOMAC FROM INDIAN HEAD TO COBB ISLAND-
1207 AM EDT THU APR 30 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING
OVERNIGHT
NW WINDS 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT.
THU...NW WINDS 10 TO 15 KT. GUSTS UP TO 25 KT
DIMINISHING TO
20 KT IN THE LATE MORNING AND AFTERNOON. WAVES 2 FT.
THU NIGHT...NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT
DIMINISHING
TO 5 KT LATE. WAVES 1 FT.
FRI
W WINDS AROUND 5 KT. WAVES 1 FT.
FRI NIGHT
NE WINDS AROUND 5 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
SAT
N WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS.
SAT NIGHT
NW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
SUN...NW WINDS 10 TO 15 KT
BECOMING S AROUND 5 KT AFTER MIDNIGHT.
WAVES 1 FT.
MON
SW WINDS 10 TO 15 KT. WAVES 1 FT.
ANZ537-302000-
TIDAL POTOMAC FROM COBB ISLAND TO SMITH POINT-
1207 AM EDT THU APR 30 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING
OVERNIGHT
W WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT. A
CHANCE OF SHOWERS.
THU...NW WINDS 15 TO 20 KT WITH GUSTS TO 25 KT
DIMINISHING TO
10 KT IN THE LATE MORNING AND AFTERNOON. WAVES 2 TO 3 FT.
THU NIGHT
NW WINDS 5 TO 10 KT. WAVES 2 FT.
FRI...NW WINDS 5 TO 10 KT
BECOMING S IN THE AFTERNOON. WAVES
1 FT.
FRI NIGHT...SE WINDS 5 TO 10 KT
BECOMING NW AFTER MIDNIGHT. WAVES
1 FT. A CHANCE OF SHOWERS.
SAT
N WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS LIKELY.
SAT NIGHT
N WINDS 10 TO 15 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
SUN...NW WINDS 10 TO 15 KT
BECOMING S 5 KT AFTER MIDNIGHT. WAVES
1 FT.
MON
SW WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.
ANZ530-302000-
CHESAPEAKE BAY NORTH OF POOLES ISLAND-
1207 AM EDT THU APR 30 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING
OVERNIGHT...SW WINDS 10 KT
BECOMING NW LATE. GUSTS UP TO 20 KT.
WAVES 1 FT. A CHANCE OF SHOWERS.
THU
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
THU NIGHT
NW WINDS 5 TO 10 KT. WAVES 1 FT.
FRI
W WINDS 5 KT. WAVES LESS THAN 1 FT.
FRI NIGHT
W WINDS AROUND 5 KT. WAVES 1 FT OR LESS. A CHANCE OF
SHOWERS.
SAT
NW WINDS AROUND 5 KT. WAVES 1 FT OR LESS. A CHANCE OF
SHOWERS.
SAT NIGHT
NW WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
SUN...NW WINDS 10 TO 15 KT
BECOMING SW AROUND 5 KT AFTER
MIDNIGHT. WAVES 1 FT OR LESS.
MON
SW WINDS 10 TO 15 KT. WAVES 1 FT.
ANZ531-302000-
CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT-
1207 AM EDT THU APR 30 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING
OVERNIGHT
W WINDS 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT. A CHANCE
OF SHOWERS.
THU...NW WINDS 10 TO 15 KT. GUSTS UP TO 25 KT
DIMINISHING TO
20 KT IN THE LATE MORNING AND AFTERNOON. WAVES 2 FT.
THU NIGHT
NW WINDS 10 TO 15 KT. GUSTS UP TO 20 KT UNTIL EARLY
MORNING. WAVES 2 FT.
FRI
W WINDS 5 KT. WAVES LESS THAN 1 FT.
FRI NIGHT
W WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF
SHOWERS.
SAT
N WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS.
SAT NIGHT
NW WINDS 10 TO 15 KT. WAVES 1 TO 2 FT. A CHANCE OF
SHOWERS.
SUN...NW WINDS 10 TO 15 KT
BECOMING SW 5 KT AFTER MIDNIGHT. WAVES
1 TO 2 FT.
MON
S WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.
ANZ538-302000-
PATAPSCO RIVER INCLUDING BALTIMORE HARBOR-
1207 AM EDT THU APR 30 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING
OVERNIGHT
W WINDS 10 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
THU
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
THU NIGHT
NW WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE EVENING.
WAVES 1 FT.
FRI
W WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS.
FRI NIGHT
W WINDS AROUND 5 KT. WAVES 1 FT OR LESS. A CHANCE OF
SHOWERS.
SAT
N WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS.
SAT NIGHT
NW WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
SUN...NW WINDS 10 TO 15 KT
BECOMING SW 5 KT AFTER MIDNIGHT. WAVES
1 FT OR LESS.
MON
SW WINDS 10 TO 15 KT. WAVES 1 FT OR LESS.
ANZ539-302000-
CHESTER RIVER TO QUEENSTOWN MD-
1207 AM EDT THU APR 30 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING
OVERNIGHT
W WINDS 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT. A CHANCE
OF SHOWERS.
THU
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
THU NIGHT
NW WINDS 5 TO 10 KT. WAVES 2 FT.
FRI
W WINDS 5 KT. WAVES LESS THAN 1 FT.
FRI NIGHT
W WINDS AROUND 5 KT. WAVES 1 FT OR LESS. A CHANCE OF
SHOWERS.
SAT
N WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS.
SAT NIGHT
NW WINDS 5 TO 10 KT. WAVES 1 TO 2 FT. A CHANCE OF
SHOWERS.
SUN...NW WINDS 10 TO 15 KT
BECOMING SW 5 KT AFTER MIDNIGHT. WAVES
1 TO 2 FT.
MON
S WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.
ANZ532-302000-
CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH-
1207 AM EDT THU APR 30 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING
OVERNIGHT
W WINDS 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT. A CHANCE
OF SHOWERS.
THU
NW WINDS 10 TO 15 KT. GUSTS UP TO 25 KT EARLY IN THE MORNING.
WAVES 2 FT.
THU NIGHT
NW WINDS 10 TO 15 KT. WAVES 2 FT.
FRI...NW WINDS 5 TO 10 KT
BECOMING S IN THE AFTERNOON. WAVES
1 FT.
FRI NIGHT...SW WINDS 5 TO 10 KT
BECOMING NW AFTER MIDNIGHT. WAVES
1 FT. A CHANCE OF SHOWERS.
SAT
N WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS.
SAT NIGHT
NW WINDS 10 TO 15 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
SUN...NW WINDS 10 TO 15 KT
BECOMING SW 5 TO 10 KT AFTER MIDNIGHT.
WAVES 1 TO 2 FT.
MON
S WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.
ANZ540-302000-
EASTERN BAY-
1207 AM EDT THU APR 30 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING
OVERNIGHT
W WINDS 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT. A
CHANCE OF SHOWERS.
THU
NW WINDS 10 TO 15 KT. GUSTS UP TO 25 KT EARLY IN THE MORNING.
WAVES 2 FT.
THU NIGHT
NW WINDS 5 TO 10 KT. WAVES 1 TO 2 FT.
FRI
W WINDS 5 KT. WAVES LESS THAN 1 FT.
FRI NIGHT
W WINDS AROUND 5 KT. WAVES 1 FT OR LESS. A CHANCE OF
SHOWERS.
SAT
N WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS.
SAT NIGHT
NW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
SUN...NW WINDS 10 TO 15 KT
BECOMING SW 5 KT AFTER MIDNIGHT. WAVES
1 FT.
MON
S WINDS 10 TO 15 KT. WAVES 1 FT.
ANZ533-302000-
CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT-
1207 AM EDT THU APR 30 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING
OVERNIGHT
W WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT. A
CHANCE OF SHOWERS.
THU...NW WINDS 15 TO 20 KT WITH GUSTS TO 25 KT
DIMINISHING TO
10 TO 15 KT IN THE LATE MORNING AND AFTERNOON. WAVES 3 FT.
THU NIGHT
NW WINDS 10 TO 15 KT. WAVES 2 FT.
FRI...NW WINDS 5 TO 10 KT
BECOMING S IN THE AFTERNOON. WAVES 1 TO
2 FT.
FRI NIGHT...S WINDS 5 TO 10 KT
BECOMING NW AFTER MIDNIGHT. WAVES
1 FT. A CHANCE OF SHOWERS.
SAT
N WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
SAT NIGHT
NW WINDS 10 TO 15 KT. GUSTS UP TO 20 KT AFTER MIDNIGHT.
WAVES 1 TO 2 FT. A CHANCE OF SHOWERS.
SUN...NW WINDS 10 TO 15 KT
BECOMING SW 5 TO 10 KT AFTER MIDNIGHT.
WAVES 1 TO 2 FT.
MON
S WINDS 15 TO 20 KT. WAVES 1 TO 2 FT.
ANZ541-302000-
CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER-
1207 AM EDT THU APR 30 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING
OVERNIGHT
W WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT. A
CHANCE OF SHOWERS.
THU...NW WINDS 15 TO 20 KT WITH GUSTS TO 25 KT
DIMINISHING TO
10 KT IN THE LATE MORNING AND AFTERNOON. WAVES 2 TO 3 FT.
THU NIGHT
NW WINDS 10 TO 15 KT. WAVES 2 FT.
FRI...NW WINDS 5 TO 10 KT
BECOMING SW IN THE AFTERNOON. WAVES
1 FT.
FRI NIGHT
W WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF
SHOWERS.
SAT
N WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS.
SAT NIGHT
NW WINDS 10 TO 15 KT. WAVES 1 TO 2 FT. A CHANCE OF
SHOWERS.
SUN...NW WINDS 10 TO 15 KT
BECOMING SW 5 TO 10 KT AFTER MIDNIGHT.
WAVES 1 TO 2 FT.
MON
S WINDS 15 TO 20 KT. WAVES 1 TO 2 FT.
ANZ542-302000-
PATUXENT RIVER TO BROOMES ISLAND MD-
1207 AM EDT THU APR 30 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING
OVERNIGHT
W WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT. A
CHANCE OF SHOWERS.
THU
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
THU NIGHT
NW WINDS 5 TO 10 KT. WAVES 1 FT.
FRI
W WINDS 5 KT. WAVES LESS THAN 1 FT.
FRI NIGHT
SW WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF
SHOWERS.
SAT
N WINDS 5 KT. WAVES LESS THAN 1 FT. SHOWERS LIKELY.
SAT NIGHT
NW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
SUN...NW WINDS 10 TO 15 KT
BECOMING SW AROUND 5 KT. WAVES 1 FT.
MON
SW WINDS 10 TO 15 KT. WAVES 1 FT.
ANZ534-302000-
CHESAPEAKE BAY FROM DRUM POINT TO SMITH POINT-
1207 AM EDT THU APR 30 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING
OVERNIGHT
W WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 3 FT. A
CHANCE OF SHOWERS.
THU...NW WINDS 20 TO 25 KT
DIMINISHING TO 10 TO 15 KT IN THE LATE
MORNING AND AFTERNOON. WAVES 3 FT.
THU NIGHT
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 3 FT.
FRI...NW WINDS 5 TO 10 KT
BECOMING SW IN THE AFTERNOON. WAVES
1 TO 2 FT.
FRI NIGHT...S WINDS 5 TO 10 KT
BECOMING NW AFTER MIDNIGHT. WAVES
1 FT. A CHANCE OF SHOWERS.
SAT
N WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS LIKELY.
SAT NIGHT...N WINDS 5 TO 10 KT
BECOMING NW 15 TO 20 KT AFTER
MIDNIGHT. WAVES 1 TO 2 FT. A CHANCE OF SHOWERS.
SUN...NW WINDS 15 TO 20 KT
BECOMING SW 5 TO 10 KT. WAVES 1 TO
2 FT.
MON
S WINDS 15 TO 20 KT. WAVES 2 FT.
ANZ543-302000-
TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH ISLAND-
1207 AM EDT THU APR 30 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING
OVERNIGHT
W WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT. A
CHANCE OF SHOWERS.
THU...NW WINDS 15 TO 20 KT WITH GUSTS TO 25 KT
DIMINISHING TO
10 KT IN THE AFTERNOON. WAVES 2 FT.
THU NIGHT
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
FRI
NW WINDS 5 TO 10 KT. WAVES 1 FT.
FRI NIGHT
SW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
SAT
N WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS LIKELY.
SAT NIGHT
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO
2 FT. A CHANCE OF SHOWERS.
SUN...NW WINDS 15 TO 20 KT
BECOMING SW 5 TO 10 KT. WAVES 1 TO
2 FT.
MON
S WINDS 15 TO 20 KT. WAVES 1 TO 2 FT.
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