208  
FZUS51 KLWX 182037  
CWFLWX  
 
COASTAL WATERS FORECAST  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
437 PM EDT FRI JUL 18 2025  
 
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.  
 
ANZ500-190800-  
437 PM EDT FRI JUL 18 2025  
 
.SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY...  
 
A FRONT STALLS ACROSS THE AREA TODAY, THEN RETURNS NORTH AS A WARM  
FRONT ON SATURDAY. A STRONGER COLD FRONT MOVES THROUGH THE AREA  
SUNDAY NIGHT. CANADIAN HIGH PRESSURE BUILDS TO THE NORTH INTO EARLY  
NEXT WEEK. DAILY SHOWER AND THUNDERSTORM CHANCES CONTINUE THROUGH  
THE WEEKEND, WITH ANY STRONGER THUNDERSTORM POSING A RISK TO  
MARINERS. SMALL CRAFT ADVISORIES MAY BE NEEDED SUNDAY NIGHT INTO  
MONDAY MORNING.  
 

 
 
ANZ535-190800-  
TIDAL POTOMAC FROM KEY BRIDGE TO INDIAN HEAD-  
437 PM EDT FRI JUL 18 2025  
   
REST OF THIS AFTERNOON
 
E WINDS 5 KT. WAVES LESS THAN 1 FT.  
SCATTERED SHOWERS AND TSTMS. VSBY 1 NM OR LESS.    
TONIGHT
 
SE WINDS AROUND 5 KT. WAVES 1 FT OR LESS. A CHANCE OF  
SHOWERS AND TSTMS. PATCHY FOG. VSBY 1 NM OR LESS.    
SAT
 
S WINDS AROUND 5 KT. WAVES 1 FT. SHOWERS LIKELY WITH A CHANCE  
OF TSTMS. PATCHY FOG. VSBY 1 TO 3 NM.    
SAT NIGHT
 
S WINDS AROUND 5 KT. WAVES 1 FT OR LESS. SHOWERS LIKELY  
WITH A CHANCE OF TSTMS.    
SUN
 
W WINDS AROUND 5 KT. WAVES 1 FT. A CHANCE OF SHOWERS AND  
TSTMS.    
SUN NIGHT
 
NW WINDS 5 KT. WAVES LESS THAN 1 FT.    
MON
 
N WINDS AROUND 5 KT. WAVES 1 FT.    
TUE
 
E WINDS AROUND 5 KT. WAVES 1 FT.  
 
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.  
 

 
 
ANZ536-190800-  
TIDAL POTOMAC FROM INDIAN HEAD TO COBB ISLAND-  
437 PM EDT FRI JUL 18 2025  
   
REST OF THIS AFTERNOON
 
E WINDS 5 KT. WAVES LESS THAN 1 FT.  
SCATTERED SHOWERS AND TSTMS. VSBY 1 NM OR LESS.    
TONIGHT
 
S WINDS AROUND 5 KT. WAVES 1 FT OR LESS. A CHANCE OF  
SHOWERS AND TSTMS. PATCHY FOG. VSBY 1 NM OR LESS.    
SAT
 
S WINDS AROUND 5 KT. WAVES 1 FT. A CHANCE OF SHOWERS AND  
TSTMS. PATCHY FOG. VSBY 1 NM OR LESS.    
SAT NIGHT
 
S WINDS AROUND 5 KT. WAVES 1 FT. A CHANCE OF SHOWERS  
AND TSTMS.    
SUN
 
W WINDS AROUND 5 KT. WAVES 1 FT. A CHANCE OF SHOWERS.    
SUN NIGHT
 
NW WINDS 5 KT. WAVES LESS THAN 1 FT.    
MON
 
NE WINDS AROUND 5 KT. WAVES 1 FT.    
TUE
 
E WINDS AROUND 5 KT. WAVES 1 FT.  
 
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.  
 

 
 
ANZ537-190800-  
TIDAL POTOMAC FROM COBB ISLAND TO SMITH POINT-  
437 PM EDT FRI JUL 18 2025  
   
REST OF THIS AFTERNOON
 
E WINDS 5 KT. WAVES LESS THAN 1 FT.  
SCATTERED SHOWERS AND TSTMS.    
TONIGHT
 
S WINDS AROUND 5 KT. WAVES 1 FT OR LESS. SHOWERS LIKELY  
WITH A CHANCE OF TSTMS. VSBY 1 NM OR LESS.    
SAT
 
S WINDS AROUND 5 KT. WAVES 1 FT OR LESS. A CHANCE OF SHOWERS  
AND TSTMS. PATCHY FOG. VSBY 1 NM OR LESS.    
SAT NIGHT
 
S WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS  
AND TSTMS.    
SUN
 
W WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS.    
SUN NIGHT
 
NW WINDS 5 TO 10 KT. WAVES 1 FT.    
MON
 
NE WINDS 5 TO 10 KT. WAVES 1 FT.    
TUE...E WINDS 5 TO 10 KT
 
BECOMING SE AFTER MIDNIGHT. WAVES 1 FT.  
 
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.  
 

 
 
ANZ530-190800-  
CHESAPEAKE BAY NORTH OF POOLES ISLAND-  
437 PM EDT FRI JUL 18 2025  
   
REST OF THIS AFTERNOON
 
NW WINDS 5 KT. WAVES FLAT. ISOLATED  
SHOWERS.    
TONIGHT
 
NE WINDS AROUND 5 KT. WAVES FLAT. A CHANCE OF SHOWERS AND  
TSTMS.    
SAT
 
E WINDS 5 KT. WAVES FLAT. A CHANCE OF SHOWERS AND TSTMS. VSBY  
1 NM OR LESS.    
SAT NIGHT
 
S WINDS 5 KT. WAVES FLAT. A CHANCE OF SHOWERS AND  
TSTMS.    
SUN
 
W WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS AND  
TSTMS.    
SUN NIGHT
 
NW WINDS 5 TO 10 KT. WAVES 1 FT.    
MON
 
N WINDS 5 TO 10 KT. WAVES 1 FT.    
TUE
 
E WINDS 5 KT. WAVES LESS THAN 1 FT.  
 
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.  
 

 
 
ANZ531-190800-  
CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT-  
437 PM EDT FRI JUL 18 2025  
   
REST OF THIS AFTERNOON
 
NE WINDS 5 KT. WAVES FLAT. ISOLATED  
SHOWERS AND TSTMS.    
TONIGHT
 
E WINDS AROUND 5 KT. WAVES FLAT. A CHANCE OF SHOWERS AND  
TSTMS. VSBY 1 NM OR LESS.    
SAT
 
SE WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS AND  
TSTMS. VSBY 1 NM OR LESS.    
SAT NIGHT
 
S WINDS 5 KT. WAVES LESS THAN 1 FT. SHOWERS LIKELY WITH  
A CHANCE OF TSTMS.    
SUN
 
W WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS AND  
TSTMS.    
SUN NIGHT
 
NW WINDS 5 TO 10 KT. WAVES 1 FT.    
MON
 
N WINDS 5 TO 10 KT. WAVES 1 FT.    
TUE...E WINDS 5 TO 10 KT
 
BECOMING SE. WAVES 1 FT.  
 
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.  
 

 
 
ANZ538-190800-  
PATAPSCO RIVER INCLUDING BALTIMORE HARBOR-  
437 PM EDT FRI JUL 18 2025  
   
REST OF THIS AFTERNOON
 
SE WINDS 5 KT. WAVES FLAT. ISOLATED  
SHOWERS AND TSTMS.    
TONIGHT
 
E WINDS AROUND 5 KT. WAVES FLAT. A CHANCE OF SHOWERS AND  
TSTMS. VSBY 1 NM OR LESS.    
SAT
 
E WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS AND  
TSTMS.    
SAT NIGHT
 
S WINDS AROUND 5 KT. WAVES FLAT. SHOWERS LIKELY WITH A  
CHANCE OF TSTMS.    
SUN
 
W WINDS AROUND 5 KT. WAVES 1 FT OR LESS. A CHANCE OF SHOWERS  
AND TSTMS.    
SUN NIGHT
 
NW WINDS 5 KT. WAVES LESS THAN 1 FT.    
MON
 
N WINDS 5 KT. WAVES LESS THAN 1 FT.    
TUE
 
SE WINDS 5 KT. WAVES LESS THAN 1 FT.  
 
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.  
 

 
 
ANZ539-190800-  
CHESTER RIVER TO QUEENSTOWN MD-  
437 PM EDT FRI JUL 18 2025  
   
REST OF THIS AFTERNOON
 
N WINDS 5 KT. WAVES FLAT.    
TONIGHT
 
E WINDS AROUND 5 KT. WAVES FLAT. A CHANCE OF SHOWERS AND  
TSTMS. VSBY 1 NM OR LESS.    
SAT
 
S WINDS 5 KT. WAVES FLAT. SHOWERS LIKELY WITH A CHANCE OF  
TSTMS. PATCHY FOG. VSBY 1 NM OR LESS.    
SAT NIGHT
 
S WINDS 5 KT. WAVES FLAT. SHOWERS LIKELY WITH A CHANCE  
OF TSTMS.    
SUN
 
W WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS AND  
TSTMS.    
SUN NIGHT
 
NW WINDS 5 TO 10 KT. WAVES 1 FT.    
MON
 
N WINDS 5 TO 10 KT. WAVES 1 FT.    
TUE
 
E WINDS 5 KT. WAVES LESS THAN 1 FT.  
 
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.  
 

 
 
ANZ532-190800-  
CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH-  
437 PM EDT FRI JUL 18 2025  
   
REST OF THIS AFTERNOON
 
NE WINDS 5 KT. WAVES FLAT. ISOLATED  
SHOWERS AND TSTMS.    
TONIGHT
 
E WINDS 5 KT. WAVES FLAT. A CHANCE OF SHOWERS AND TSTMS.  
VSBY 1 NM OR LESS.    
SAT
 
SE WINDS 5 KT. WAVES LESS THAN 1 FT. SHOWERS LIKELY WITH A  
CHANCE OF TSTMS. PATCHY FOG. VSBY 1 NM OR LESS.    
SAT NIGHT
 
S WINDS 5 KT. WAVES LESS THAN 1 FT. SHOWERS LIKELY WITH  
A CHANCE OF TSTMS.    
SUN
 
W WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS AND  
TSTMS.    
SUN NIGHT
 
NW WINDS 5 TO 10 KT. WAVES 1 FT.    
MON
 
NE WINDS 5 TO 10 KT. WAVES 1 FT.    
TUE...E WINDS 5 TO 10 KT
 
BECOMING S AFTER MIDNIGHT. WAVES 1 FT.  
 
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.  
 

 
 
ANZ540-190800-  
EASTERN BAY-  
437 PM EDT FRI JUL 18 2025  
   
REST OF THIS AFTERNOON
 
N WINDS 5 KT. WAVES FLAT.    
TONIGHT
 
E WINDS AROUND 5 KT. WAVES FLAT. A CHANCE OF SHOWERS AND  
TSTMS. VSBY 1 NM OR LESS.    
SAT
 
S WINDS 5 KT. WAVES FLAT. SHOWERS LIKELY WITH A CHANCE OF  
TSTMS. VSBY 1 NM OR LESS.    
SAT NIGHT
 
S WINDS 5 KT. WAVES FLAT. SHOWERS LIKELY WITH A CHANCE  
OF TSTMS.    
SUN
 
W WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS AND  
TSTMS.    
SUN NIGHT
 
NW WINDS 5 TO 10 KT. WAVES 1 FT.    
MON
 
N WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.    
TUE
 
E WINDS 5 KT. WAVES LESS THAN 1 FT.  
 
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.  
 

 
 
ANZ533-190800-  
CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT-  
437 PM EDT FRI JUL 18 2025  
   
REST OF THIS AFTERNOON
 
NE WINDS 5 KT. WAVES LESS THAN 1 FT.  
ISOLATED SHOWERS AND TSTMS.    
TONIGHT
 
S WINDS 5 KT. WAVES FLAT. SHOWERS LIKELY WITH A CHANCE OF  
TSTMS. VSBY 1 NM OR LESS.    
SAT
 
S WINDS 5 KT. WAVES LESS THAN 1 FT. SHOWERS LIKELY WITH A  
CHANCE OF TSTMS. PATCHY FOG. VSBY 1 NM OR LESS.    
SAT NIGHT
 
S WINDS 5 KT. WAVES LESS THAN 1 FT. SHOWERS LIKELY WITH  
A CHANCE OF TSTMS.    
SUN
 
W WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS.    
SUN NIGHT
 
NW WINDS 5 TO 10 KT. WAVES 1 FT.    
MON
 
NE WINDS 5 TO 10 KT. WAVES 1 FT.    
TUE...E WINDS 5 TO 10 KT
 
BECOMING SE AFTER MIDNIGHT. WAVES 1 FT.  
 
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.  
 

 
 
ANZ541-190800-  
CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER-  
437 PM EDT FRI JUL 18 2025  
   
REST OF THIS AFTERNOON
 
N WINDS 5 KT. WAVES FLAT.    
TONIGHT
 
S WINDS AROUND 5 KT. WAVES FLAT. A CHANCE OF SHOWERS AND  
TSTMS. VSBY 1 NM OR LESS.    
SAT
 
S WINDS 5 KT. WAVES FLAT. SHOWERS LIKELY WITH A CHANCE OF  
TSTMS. PATCHY FOG. VSBY 1 NM OR LESS.    
SAT NIGHT
 
S WINDS 5 KT. WAVES LESS THAN 1 FT. SHOWERS LIKELY WITH  
A CHANCE OF TSTMS.    
SUN
 
W WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS AND  
TSTMS.    
SUN NIGHT
 
NW WINDS 5 TO 10 KT. WAVES 1 FT.    
MON
 
NE WINDS 5 TO 10 KT. WAVES 1 FT.    
TUE...E WINDS 5 TO 10 KT
 
BECOMING SE AFTER MIDNIGHT. WAVES 1 FT  
OR LESS.  
 
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.  
 

 
 
ANZ542-190800-  
PATUXENT RIVER TO BROOMES ISLAND MD-  
437 PM EDT FRI JUL 18 2025  
   
REST OF THIS AFTERNOON
 
NE WINDS 5 KT. WAVES LESS THAN 1 FT.  
ISOLATED SHOWERS AND TSTMS.    
TONIGHT
 
S WINDS AROUND 5 KT. WAVES 1 FT. SHOWERS LIKELY WITH A  
CHANCE OF TSTMS.    
SAT
 
S WINDS AROUND 5 KT. WAVES 1 FT. A CHANCE OF SHOWERS AND  
TSTMS. PATCHY FOG.    
SAT NIGHT
 
S WINDS AROUND 5 KT. WAVES 1 FT. SHOWERS AND TSTMS  
LIKELY.    
SUN
 
W WINDS 5 KT. WAVES LESS THAN 1 FT.    
SUN NIGHT
 
NW WINDS 5 TO 10 KT. WAVES 1 FT.    
MON
 
NE WINDS 5 TO 10 KT. WAVES 1 FT.    
TUE
 
E WINDS 5 KT. WAVES LESS THAN 1 FT.  
 
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.  
 

 
 
ANZ534-190800-  
CHESAPEAKE BAY FROM DRUM POINT TO SMITH POINT-  
437 PM EDT FRI JUL 18 2025  
   
REST OF THIS AFTERNOON
 
N WINDS 5 KT. WAVES LESS THAN 1 FT.  
ISOLATED SHOWERS AND TSTMS.    
TONIGHT
 
S WINDS 5 KT. WAVES LESS THAN 1 FT. SHOWERS LIKELY WITH A  
CHANCE OF TSTMS.    
SAT
 
S WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS AND  
TSTMS. PATCHY FOG. VSBY 1 NM OR LESS.    
SAT NIGHT
 
SW WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS LIKELY WITH A  
CHANCE OF TSTMS.    
SUN
 
W WINDS 5 TO 10 KT. WAVES 1 FT.    
SUN NIGHT
 
NW WINDS 5 TO 10 KT. WAVES 1 TO 2 FT.    
MON
 
NE WINDS 5 TO 10 KT. WAVES 1 TO 2 FT.    
TUE
 
E WINDS 5 TO 10 KT. WAVES 1 FT.  
 
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.  
 

 
 
ANZ543-190800-  
TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH ISLAND-  
437 PM EDT FRI JUL 18 2025  
   
REST OF THIS AFTERNOON
 
NW WINDS 5 KT. WAVES FLAT. ISOLATED  
SHOWERS AND TSTMS.    
TONIGHT
 
S WINDS 5 KT. WAVES FLAT. SHOWERS LIKELY WITH A CHANCE OF  
TSTMS.    
SAT
 
S WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS AND  
TSTMS. PATCHY FOG.    
SAT NIGHT
 
SW WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS LIKELY WITH A  
CHANCE OF TSTMS.    
SUN
 
W WINDS 5 TO 10 KT. WAVES 1 FT.    
SUN NIGHT
 
NW WINDS 5 TO 10 KT. WAVES 1 FT.    
MON
 
NE WINDS 5 TO 10 KT. WAVES 1 FT.    
TUE
 
E WINDS 5 TO 10 KT. WAVES 1 FT.  
 
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.  
 

 
 
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