161
FZUS51 KLWX 211501
CWFLWX
COASTAL WATERS FORECAST
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
1101 AM EDT TUE JUL 21 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.
ANZ500-212000-
1101 AM EDT TUE JUL 21 2026
.SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY...
A WARM FRONT WILL RETURN NORTHWARD THIS MORNING, FOLLOWED BY A COLD
FRONT SLOWLY PUSHING THROUGH TONIGHT INTO WEDNESDAY. HIGH PRESSURE
WILL BUILD IN FROM THE WEST THURSDAY AND FRIDAY. SPECIAL MARINE
WARNINGS FOR STRONG TO SEVERE THUNDERSTORMS ARE LIKELY THIS
AFTERNOON AND EVENING. SMALL CRAFT ADVISORIES WILL LIKELY BE NEEDED
WEDNESDAY NIGHT THROUGH THURSDAY MORNING.
ANZ535-212000-
TIDAL POTOMAC FROM KEY BRIDGE TO INDIAN HEAD-
1101 AM EDT TUE JUL 21 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT
REST OF TODAY
SW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES
1 FT. NUMEROUS SHOWERS AND TSTMS THIS AFTERNOON.
TONIGHT
SW WINDS 10 TO 15 KT. GUSTS UP TO 20 KT. WAVES 1 FT.
NUMEROUS SHOWERS AND TSTMS.
WED
W WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS LIKELY WITH A CHANCE
OF TSTMS.
WED NIGHT
NW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS
AND TSTMS.
THU
N WINDS 5 TO 10 KT. WAVES 1 FT.
THU NIGHT
NE WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
FRI
E WINDS AROUND 5 KT. WAVES 1 FT.
SAT
SE WINDS AROUND 5 KT. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ536-212000-
TIDAL POTOMAC FROM INDIAN HEAD TO COBB ISLAND-
1101 AM EDT TUE JUL 21 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT
REST OF TODAY
SW WINDS 10 TO 15 KT WITH GUSTS TO 25 KT. WAVES
1 TO 2 FT. NUMEROUS SHOWERS AND TSTMS THIS AFTERNOON.
TONIGHT
SW WINDS 10 TO 15 KT WITH GUSTS TO 25 KT. WAVES 1 TO
2 FT. SHOWERS AND NUMEROUS TSTMS.
WED
SW WINDS 10 TO 15 KT. GUSTS UP TO 20 KT UNTIL LATE AFTERNOON.
WAVES 1 FT. SHOWERS WITH A CHANCE OF TSTMS.
WED NIGHT
NW WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS LIKELY WITH A
CHANCE OF TSTMS.
THU
N WINDS 5 TO 10 KT. WAVES 1 FT.
THU NIGHT
NE WINDS AROUND 5 KT. WAVES 1 FT.
FRI
E WINDS AROUND 5 KT. WAVES 1 FT.
SAT
SE WINDS AROUND 5 KT. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ537-212000-
TIDAL POTOMAC FROM COBB ISLAND TO SMITH POINT-
1101 AM EDT TUE JUL 21 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY AFTERNOON
REST OF TODAY
SW WINDS 15 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
SCATTERED SHOWERS WITH ISOLATED TSTMS LATE THIS MORNING, THEN
NUMEROUS SHOWERS AND TSTMS THIS AFTERNOON.
TONIGHT
SW WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
SHOWERS AND NUMEROUS TSTMS.
WED...SW WINDS 15 TO 20 KT
DIMINISHING TO 10 KT LATE. GUSTS UP TO
25 KT. WAVES 2 FT. SHOWERS WITH A CHANCE OF TSTMS.
WED NIGHT
NW WINDS 10 TO 15 KT. GUSTS UP TO 20 KT. WAVES 1 TO
2 FT. SHOWERS WITH A CHANCE OF TSTMS.
THU
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
THU NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT.
FRI
E WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS AFTER
MIDNIGHT.
SAT
E WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS
THROUGH THE DAY.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ530-212000-
CHESAPEAKE BAY NORTH OF POOLES ISLAND-
1101 AM EDT TUE JUL 21 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY MORNING
REST OF TODAY
S WINDS 15 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
SCATTERED SHOWERS AND TSTMS LATE THIS MORNING, THEN SHOWERS AND
NUMEROUS TSTMS THIS AFTERNOON.
TONIGHT
SW WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
SHOWERS AND NUMEROUS TSTMS.
WED
W WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT. A
CHANCE OF SHOWERS AND TSTMS.
WED NIGHT
NW WINDS 10 TO 15 KT. WAVES 1 FT. A CHANCE OF SHOWERS
AND TSTMS.
THU
N WINDS 5 TO 10 KT. WAVES 1 FT.
THU NIGHT
NE WINDS AROUND 5 KT. WAVES 1 FT.
FRI
E WINDS AROUND 5 KT. WAVES 1 FT.
SAT
E WINDS AROUND 5 KT. WAVES 1 FT. A CHANCE OF SHOWERS THROUGH
THE NIGHT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ531-212000-
CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT-
1101 AM EDT TUE JUL 21 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY MORNING
REST OF TODAY
S WINDS 15 KT WITH GUSTS TO 25 KT. WAVES 3 FT.
ISOLATED SHOWERS AND TSTMS LATE THIS MORNING, THEN SHOWERS AND
NUMEROUS TSTMS THIS AFTERNOON.
TONIGHT
SW WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 3 FT.
SHOWERS AND NUMEROUS TSTMS.
WED
SW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT. A
CHANCE OF SHOWERS AND TSTMS.
WED NIGHT
NW WINDS 10 TO 15 KT. GUSTS UP TO 20 KT. WAVES 1 TO
2 FT. A CHANCE OF SHOWERS AND TSTMS.
THU
N WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.
THU NIGHT
NE WINDS 5 KT. WAVES LESS THAN 1 FT.
FRI
E WINDS 5 TO 10 KT. WAVES 1 FT.
SAT
E WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS
THROUGH THE NIGHT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ538-212000-
PATAPSCO RIVER INCLUDING BALTIMORE HARBOR-
1101 AM EDT TUE JUL 21 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY MORNING
REST OF TODAY
SW WINDS 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
ISOLATED SHOWERS AND TSTMS LATE THIS MORNING, THEN SHOWERS AND
NUMEROUS TSTMS THIS AFTERNOON.
TONIGHT
SW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
NUMEROUS SHOWERS AND TSTMS.
WED
W WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS AND
TSTMS.
WED NIGHT
NW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS
AND TSTMS.
THU
N WINDS 5 TO 10 KT. WAVES 1 FT.
THU NIGHT
NE WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
FRI
E WINDS 5 TO 10 KT. WAVES 1 FT.
SAT
E WINDS AROUND 5 KT. WAVES 1 FT OR LESS. A CHANCE OF SHOWERS
THROUGH THE NIGHT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ539-212000-
CHESTER RIVER TO QUEENSTOWN MD-
1101 AM EDT TUE JUL 21 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY MORNING
REST OF TODAY
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES
2 FT. ISOLATED SHOWERS AND TSTMS LATE THIS MORNING, THEN SHOWERS AND
NUMEROUS TSTMS THIS AFTERNOON.
TONIGHT
SW WINDS 15 KT WITH GUSTS TO 25 KT. WAVES 2 FT. SHOWERS
AND NUMEROUS TSTMS.
WED...SW WINDS 10 TO 15 KT
DIMINISHING TO 5 KT LATE. GUSTS UP TO
20 KT. WAVES 1 TO 2 FT. A CHANCE OF SHOWERS AND TSTMS.
WED NIGHT
NW WINDS 5 TO 10 KT. WAVES 1 TO 2 FT. A CHANCE OF
SHOWERS AND TSTMS.
THU
N WINDS 5 TO 10 KT. WAVES 1 TO 2 FT.
THU NIGHT
NE WINDS 5 KT. WAVES LESS THAN 1 FT.
FRI
E WINDS 5 KT. WAVES LESS THAN 1 FT.
SAT
E WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS
THROUGH THE NIGHT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ532-212000-
CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH-
1101 AM EDT TUE JUL 21 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY MORNING
REST OF TODAY
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES
3 FT. NUMEROUS SHOWERS AND TSTMS THIS AFTERNOON.
TONIGHT
SW WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 3 FT.
SHOWERS AND NUMEROUS TSTMS.
WED
SW WINDS 10 TO 15 KT. GUSTS UP TO 20 KT UNTIL LATE AFTERNOON.
WAVES 1 TO 2 FT. A CHANCE OF SHOWERS AND TSTMS.
WED NIGHT
NW WINDS 10 TO 15 KT. GUSTS UP TO 20 KT. WAVES 1 TO
2 FT. A CHANCE OF SHOWERS AND TSTMS.
THU
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
THU NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT.
FRI
E WINDS 5 TO 10 KT. WAVES 1 FT.
SAT...E WINDS 5 TO 10 KT
BECOMING SE AFTER MIDNIGHT. WAVES 1 FT.
A CHANCE OF SHOWERS THROUGH THE NIGHT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ540-212000-
EASTERN BAY-
1101 AM EDT TUE JUL 21 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY MORNING
REST OF TODAY
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES
2 FT. ISOLATED SHOWERS AND TSTMS LATE THIS MORNING, THEN SHOWERS AND
NUMEROUS TSTMS THIS AFTERNOON.
TONIGHT
SW WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
SHOWERS AND NUMEROUS TSTMS.
WED...SW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT
DIMINISHING TO
5 KT LATE. WAVES 1 TO 2 FT. A CHANCE OF SHOWERS AND TSTMS.
WED NIGHT...W WINDS 5 TO 10 KT
BECOMING N 10 TO 15 KT AFTER
MIDNIGHT. GUSTS UP TO 20 KT. WAVES 1 FT. A CHANCE OF SHOWERS AND
TSTMS.
THU
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
THU NIGHT
NE WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
FRI
E WINDS 5 TO 10 KT. WAVES 1 FT.
SAT
E WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS
THROUGH THE NIGHT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ533-212000-
CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT-
1101 AM EDT TUE JUL 21 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY MORNING
REST OF TODAY
SW WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES
3 FT. ISOLATED SHOWERS AND TSTMS LATE THIS MORNING, THEN NUMEROUS
SHOWERS AND TSTMS THIS AFTERNOON.
TONIGHT
SW WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 3 FT.
SHOWERS AND NUMEROUS TSTMS.
WED...SW WINDS 15 TO 20 KT WITH GUSTS TO 25 KT
DIMINISHING TO
5 TO 10 KT IN THE AFTERNOON. WAVES 2 TO 3 FT. SHOWERS LIKELY WITH A
CHANCE OF TSTMS.
WED NIGHT
NW WINDS 10 TO 15 KT. GUSTS UP TO 20 KT. WAVES 1 TO
2 FT. SHOWERS LIKELY WITH A CHANCE OF TSTMS.
THU
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
THU NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT.
FRI
E WINDS 5 TO 10 KT. WAVES 1 FT.
SAT...E WINDS 5 TO 10 KT
BECOMING S AFTER MIDNIGHT. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ541-212000-
CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER-
1101 AM EDT TUE JUL 21 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY MORNING
REST OF TODAY
S WINDS 15 TO 20 KT WITH GUSTS TO 30 KT. WAVES
2 FT. ISOLATED SHOWERS AND TSTMS LATE THIS MORNING, THEN NUMEROUS
SHOWERS AND TSTMS THIS AFTERNOON.
TONIGHT
SW WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 TO
3 FT. SHOWERS AND NUMEROUS TSTMS.
WED...SW WINDS 15 TO 20 KT WITH GUSTS TO 25 KT
DIMINISHING TO
5 TO 10 KT IN THE AFTERNOON. WAVES 1 TO 2 FT. SHOWERS LIKELY WITH A
CHANCE OF TSTMS.
WED NIGHT
NW WINDS 10 TO 15 KT. GUSTS UP TO 20 KT. WAVES 1 TO
2 FT. A CHANCE OF SHOWERS AND TSTMS.
THU
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT.
THU NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT.
FRI
E WINDS 5 TO 10 KT. WAVES 1 FT.
SAT
E WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS
THROUGH THE DAY.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ542-212000-
PATUXENT RIVER TO BROOMES ISLAND MD-
1101 AM EDT TUE JUL 21 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY MORNING
REST OF TODAY
SW WINDS 15 KT WITH GUSTS TO 25 KT. WAVES 1 FT.
ISOLATED SHOWERS AND TSTMS LATE THIS MORNING, THEN NUMEROUS SHOWERS
AND TSTMS THIS AFTERNOON.
TONIGHT
SW WINDS 10 TO 15 KT WITH GUSTS TO 25 KT. WAVES 1 FT.
SHOWERS AND NUMEROUS TSTMS.
WED
SW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT. SHOWERS
WITH A CHANCE OF TSTMS.
WED NIGHT
NW WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS LIKELY WITH A
CHANCE OF TSTMS.
THU
N WINDS 5 TO 10 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
THU NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT.
FRI
E WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS AFTER
MIDNIGHT.
SAT
E WINDS AROUND 5 KT. WAVES 1 FT. A CHANCE OF SHOWERS IN THE
MORNING.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ534-212000-
CHESAPEAKE BAY FROM DRUM POINT TO SMITH POINT-
1101 AM EDT TUE JUL 21 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY AFTERNOON
REST OF TODAY
SW WINDS 15 TO 20 KT WITH GUSTS TO 30 KT. WAVES
3 FT. SCATTERED SHOWERS AND TSTMS LATE THIS MORNING, THEN NUMEROUS
SHOWERS AND TSTMS THIS AFTERNOON.
TONIGHT
SW WINDS 20 TO 25 KT WITH GUSTS TO 30 KT. WAVES 4 FT.
SHOWERS AND NUMEROUS TSTMS.
WED...SW WINDS 20 TO 25 KT WITH GUSTS TO 30 KT
DIMINISHING TO
10 TO 15 KT WITH GUSTS TO 20 KT LATE. WAVES 3 FT. SHOWERS WITH A
CHANCE OF TSTMS.
WED NIGHT...W WINDS 10 KT
BECOMING N AFTER MIDNIGHT. GUSTS UP TO
20 KT. WAVES 2 TO 3 FT. SHOWERS WITH A CHANCE OF TSTMS.
THU
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 TO 3 FT.
THU NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT.
FRI
E WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS AFTER
MIDNIGHT.
SAT...E WINDS 5 TO 10 KT
BECOMING SW AFTER MIDNIGHT. WAVES 1 FT.
A CHANCE OF SHOWERS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ543-212000-
TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH ISLAND-
1101 AM EDT TUE JUL 21 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY AFTERNOON
REST OF TODAY
SW WINDS 20 KT WITH GUSTS TO 30 KT. WAVES 2 TO
3 FT. SCATTERED SHOWERS AND TSTMS LATE THIS MORNING, THEN NUMEROUS
SHOWERS AND TSTMS THIS AFTERNOON.
TONIGHT
SW WINDS 20 TO 25 KT WITH GUSTS TO 30 KT. WAVES 3 FT.
SHOWERS AND NUMEROUS TSTMS.
WED...SW WINDS 20 TO 25 KT
DIMINISHING TO 10 TO 15 KT LATE. GUSTS
UP TO 30 KT. WAVES 2 TO 3 FT. SHOWERS WITH TSTMS LIKELY.
WED NIGHT...SW WINDS 10 TO 15 KT
BECOMING N AFTER MIDNIGHT. GUSTS
UP TO 20 KT. WAVES 1 TO 2 FT. SHOWERS WITH TSTMS LIKELY.
THU
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT.
THU NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT.
FRI
E WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS AFTER
MIDNIGHT.
SAT
NE WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
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