Alert archive / Virginia / Storm Warnings in 2021

Storm Warning 1, NWS Baltimore/Washington

April 29, 2021

NWS Baltimore/Washington issued this storm warning at Apr 29, 2021, 8:36 PM EDT. It took effect at Apr 30, 2021, 3:42 AM EDT. It was in force for 17 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Apr 29, 2021, 8:36 PM EDT (00:36 UTC)
In effect from: Apr 30, 2021, 3:42 AM EDT
Expired: Apr 30, 2021, 8:54 PM EDT
In force: 17 hr
Issued by: NWS Baltimore/Washington

The text

As transmitted.

981 
WHUS71 KLWX 300036
MWWLWX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Baltimore MD/Washington DC
836 PM EDT Thu Apr 29 2021

ANZ535-300845-
/O.CON.KLWX.SC.Y.0095.000000T0000Z-210430T1000Z/
/O.EXT.KLWX.GL.W.0016.210430T1000Z-210501T1000Z/
/O.CAN.KLWX.SR.A.0001.210430T2200Z-210501T1000Z/
Tidal Potomac from Key Bridge to Indian Head MD-
836 PM EDT Thu Apr 29 2021

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 AM EDT FRIDAY...
...GALE WARNING NOW IN EFFECT FROM 6 AM FRIDAY TO 6 AM EDT
SATURDAY...
...STORM WATCH IS CANCELLED...

* WHAT...For the Gale Warning, northwest winds 20 to 25 kt with 
  gusts up to 45 kt expected. For the Small Craft Advisory, west 
  winds 10 to 15 kt with gusts up to 25 kt.

* WHERE...Tidal Potomac from Key Bridge to Indian Head MD.

* WHEN...For the Gale Warning, from 6 AM Friday to 6 AM EDT 
  Saturday. For the Small Craft Advisory, until 6 AM EDT Friday.

* IMPACTS...Strong winds will cause hazardous waves which could 
  capsize or damage vessels.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should alter plans to avoid these hazardous conditions.
Remain in port, seek safe harbor, alter course, and/or secure the
vessel for severe conditions.

&&

$$

ANZ530>532-538>540-300845-
/O.CON.KLWX.SC.Y.0095.000000T0000Z-210430T1000Z/
/O.UPG.KLWX.GL.W.0016.210430T1000Z-210430T2200Z/
/O.UPG.KLWX.SR.A.0001.210430T2200Z-210501T1000Z/
/O.NEW.KLWX.SR.W.0001.210430T1000Z-210501T1000Z/
Chesapeake Bay north of Pooles Island MD-
Chesapeake Bay from Pooles Island to Sandy Point MD-
Chesapeake Bay from Sandy Point to North Beach MD-
Patapsco River including Baltimore Harbor-
Chester River to Queenstown MD-Eastern Bay-
836 PM EDT Thu Apr 29 2021

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 AM EDT FRIDAY...
...STORM WARNING IN EFFECT FROM 6 AM FRIDAY TO 6 AM EDT
SATURDAY...

* WHAT...For the Storm Warning, northwest winds 20 to 30 kt with 
  gusts up to 50 kt and waves 2 to 4 ft expected. For the Small 
  Craft Advisory, west winds 10 to 15 kt with gusts up to 25 kt.

* WHERE...Chesapeake Bay north of North Beach MD, Patapsco River 
  including Baltimore Harbor, Chester River to Queenstown MD, 
  and Eastern Bay.

* WHEN...For the Storm Warning, from 6 AM Friday to 6 AM EDT 
  Saturday. For the Small Craft Advisory, until 6 AM EDT Friday.

* IMPACTS...Very strong winds will cause hazardous waves which 
  could capsize or damage vessels.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should remain in port, alter course, and/or secure the
vessel for severe conditions.

&&

$$

ANZ533-534-536-537-541>543-300845-
/O.CON.KLWX.SC.Y.0095.000000T0000Z-210430T1000Z/
/O.CON.KLWX.GL.W.0016.210430T1000Z-210501T1000Z/
Chesapeake Bay from North Beach to Drum Point MD-
Chesapeake Bay from Drum Point MD to Smith Point VA-
Tidal Potomac from Indian Head to Cobb Island MD-
Tidal Potomac from Cobb Island MD to Smith Point VA-
Choptank River to Cambridge MD and the Little Choptank River-
Patuxent River to Broomes Island MD-
Tangier Sound and the inland waters surrounding Bloodsworth
Island-
836 PM EDT Thu Apr 29 2021

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 AM EDT FRIDAY...
...GALE WARNING REMAINS IN EFFECT FROM 6 AM FRIDAY TO 6 AM EDT
SATURDAY...

* WHAT...For the Gale Warning, northwest winds 20 to 30 kt with 
  gusts up to 45 kt and waves 3 to 6 ft expected. For the Small 
  Craft Advisory, southwest winds 10 to 20 kt with gusts up to 
  25 kt.

* WHERE...Tidal Potomac River from Indian Head MD to Smith Point 
  VA, Chesapeake Bay from North Beach MD to Smith Point VA, 
  Patuxent River to Broomes Island MD, Tangier Sound and the 
  inland waters surrounding Bloodsworth Island, and Choptank 
  River to Cambridge MD and the Little Choptank River.

* WHEN...For the Gale Warning, from 6 AM Friday to 6 AM EDT 
  Saturday. For the Small Craft Advisory, until 6 AM EDT Friday.

* IMPACTS...Strong winds will cause hazardous waves which could 
  capsize or damage vessels.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should alter plans to avoid these hazardous conditions.
Remain in port, seek safe harbor, alter course, and/or secure the
vessel for severe conditions.

&&

$$

6 follow-up statements

003 
WHUS71 KLWX 300528
MWWLWX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Baltimore MD/Washington DC
128 AM EDT Fri Apr 30 2021

ANZ533>537-541>543-301600-
/O.CON.KLWX.SC.Y.0095.000000T0000Z-210430T1000Z/
/O.CON.KLWX.GL.W.0016.210430T1000Z-210501T1000Z/
Chesapeake Bay from North Beach to Drum Point MD-
Chesapeake Bay from Drum Point MD to Smith Point VA-
Tidal Potomac from Key Bridge to Indian Head MD-
Tidal Potomac from Indian Head to Cobb Island MD-
Tidal Potomac from Cobb Island MD to Smith Point VA-
Choptank River to Cambridge MD and the Little Choptank River-
Patuxent River to Broomes Island MD-
Tangier Sound and the inland waters surrounding Bloodsworth
Island-
128 AM EDT Fri Apr 30 2021

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 AM EDT EARLY
THIS MORNING...
...GALE WARNING REMAINS IN EFFECT FROM 6 AM THIS MORNING TO 6 AM
EDT SATURDAY...

* WHAT...For the Gale Warning, northwest winds 20 to 30 kt with 
  gusts up to 45 kt and waves 3 to 6 ft expected. For the Small 
  Craft Advisory, southwest winds 10 to 20 kt with gusts up to 
  25 kt.

* WHERE...Tidal Potomac River from Indian Head MD to Smith Point 
  VA, Chesapeake Bay from North Beach MD to Smith Point VA, 
  Patuxent River to Broomes Island MD, Tangier Sound and the 
  inland waters surrounding Bloodsworth Island, and Choptank 
  River to Cambridge MD and the Little Choptank River.

* WHEN...For the Gale Warning, from 6 AM Friday to 6 AM EDT 
  Saturday. For the Small Craft Advisory, until 6 AM EDT Friday.

* IMPACTS...Strong winds will cause hazardous waves which could 
  capsize or damage vessels.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should alter plans to avoid these hazardous conditions.
Remain in port, seek safe harbor, alter course, and/or secure the
vessel for severe conditions.

&&

$$

ANZ530>532-538>540-301600-
/O.CON.KLWX.SC.Y.0095.000000T0000Z-210430T1000Z/
/O.CON.KLWX.SR.W.0001.210430T1000Z-210501T1000Z/
Chesapeake Bay north of Pooles Island MD-
Chesapeake Bay from Pooles Island to Sandy Point MD-
Chesapeake Bay from Sandy Point to North Beach MD-
Patapsco River including Baltimore Harbor-
Chester River to Queenstown MD-Eastern Bay-
128 AM EDT Fri Apr 30 2021

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 AM EDT EARLY
THIS MORNING...
...STORM WARNING REMAINS IN EFFECT FROM 6 AM THIS MORNING TO 6 AM
EDT SATURDAY...

* WHAT...For the Storm Warning, northwest winds 20 to 30 kt with 
  gusts up to 50 kt and waves 2 to 4 ft expected. For the Small 
  Craft Advisory, west winds 10 to 15 kt with gusts up to 25 kt.

* WHERE...Chesapeake Bay north of North Beach MD, Patapsco River 
  including Baltimore Harbor, Chester River to Queenstown MD, 
  and Eastern Bay.

* WHEN...For the Storm Warning, from 6 AM Friday to 6 AM EDT 
  Saturday. For the Small Craft Advisory, until 6 AM EDT Friday.

* IMPACTS...Very strong winds will cause hazardous waves which 
  could capsize or damage vessels.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should remain in port, alter course, and/or secure the
vessel for severe conditions.

&&

$$

651 
WHUS71 KLWX 300742
MWWLWX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Baltimore MD/Washington DC
342 AM EDT Fri Apr 30 2021

ANZ533-541-542-301545-
/O.CAN.KLWX.SC.Y.0095.000000T0000Z-210430T1000Z/
/O.EXT.KLWX.GL.W.0016.210430T0742Z-210501T1000Z/
Chesapeake Bay from North Beach to Drum Point MD-
Choptank River to Cambridge MD and the Little Choptank River-
Patuxent River to Broomes Island MD-
342 AM EDT Fri Apr 30 2021

...GALE WARNING NOW IN EFFECT UNTIL 6 AM EDT SATURDAY...
...SMALL CRAFT ADVISORY IS CANCELLED...

* WHAT...Northwest winds 15 to 25 kt with gusts up to 45 kt.

* WHERE...Patuxent River to Broomes Island MD, Choptank River to 
  Cambridge MD and the Little Choptank River and Chesapeake Bay 
  from North Beach to Drum Point MD.

* WHEN...Until 6 AM EDT Saturday.

* IMPACTS...Strong winds will cause hazardous waves which could 
  capsize or damage vessels.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should alter plans to avoid these hazardous conditions.
Remain in port, seek safe harbor, alter course, and/or secure the
vessel for severe conditions.

&&

$$

ANZ530>532-538>540-301545-
/O.CAN.KLWX.SC.Y.0095.000000T0000Z-210430T1000Z/
/O.EXT.KLWX.SR.W.0001.210430T0742Z-210501T1000Z/
Chesapeake Bay north of Pooles Island MD-
Chesapeake Bay from Pooles Island to Sandy Point MD-
Chesapeake Bay from Sandy Point to North Beach MD-
Patapsco River including Baltimore Harbor-
Chester River to Queenstown MD-Eastern Bay-
342 AM EDT Fri Apr 30 2021

...STORM WARNING NOW IN EFFECT UNTIL 6 AM EDT SATURDAY...
...SMALL CRAFT ADVISORY IS CANCELLED...

* WHAT...Northwest winds 20 to 30 kt with gusts up to 50 kt.

* WHERE...Chesapeake Bay north of North Beach MD, Chester River 
  to Queenstown MD, Patapsco River including Baltimore Harbor, 
  and Eastern Bay.

* WHEN...Until 6 AM EDT Saturday.

* IMPACTS...Very strong winds will cause hazardous waves which 
  could capsize or damage vessels.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should remain in port, alter course, and/or secure the
vessel for severe conditions.

&&

$$

ANZ534>537-543-301545-
/O.CON.KLWX.SC.Y.0095.000000T0000Z-210430T1000Z/
/O.CON.KLWX.GL.W.0016.210430T1000Z-210501T1000Z/
Chesapeake Bay from Drum Point MD to Smith Point VA-
Tidal Potomac from Key Bridge to Indian Head MD-
Tidal Potomac from Indian Head to Cobb Island MD-
Tidal Potomac from Cobb Island MD to Smith Point VA-
Tangier Sound and the inland waters surrounding Bloodsworth
Island-
342 AM EDT Fri Apr 30 2021

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 AM EDT EARLY
THIS MORNING...
...GALE WARNING REMAINS IN EFFECT UNTIL 6 AM EDT SATURDAY...

* WHAT...For the Gale Warning, northwest winds 20 to 30 kt with 
  gusts up to 45 kt expected. For the Small Craft Advisory, west 
  winds 10 to 20 kt with gusts up to 25 kt.

* WHERE...Tidal Potomac River from Key Bridge to Smith Point VA, 
  Tangier Sound and the inland waters surrounding Bloodsworth 
  Island, and Chesapeake Bay from Drum Point MD to Smith Point 
  VA.

* WHEN...For the Gale Warning, until 6 AM EDT Saturday. For the 
  Small Craft Advisory, until 6 AM EDT early this morning.

* IMPACTS...Strong winds will cause hazardous waves which could 
  capsize or damage vessels.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should alter plans to avoid these hazardous conditions.
Remain in port, seek safe harbor, alter course, and/or secure the
vessel for severe conditions.

&&

$$

733 
WHUS71 KLWX 301118
MWWLWX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Baltimore MD/Washington DC
718 AM EDT Fri Apr 30 2021

ANZ534>537-543-301930-
/O.CON.KLWX.GL.W.0016.000000T0000Z-210501T1000Z/
Chesapeake Bay from Drum Point MD to Smith Point VA-
Tidal Potomac from Key Bridge to Indian Head MD-
Tidal Potomac from Indian Head to Cobb Island MD-
Tidal Potomac from Cobb Island MD to Smith Point VA-
Tangier Sound and the inland waters surrounding Bloodsworth
Island-
718 AM EDT Fri Apr 30 2021

...GALE WARNING REMAINS IN EFFECT UNTIL 6 AM EDT SATURDAY...

* WHAT...Northwest winds 20 to 30 kt with gusts up to 45 kt and
  waves of 3 to 6 feet.

* WHERE...Tidal Potomac River from Key Bridge to Smith Point VA, 
  Tangier Sound and the inland waters surrounding Bloodsworth 
  Island, and Chesapeake Bay from Drum Point MD to Smith Point 
  VA.

* WHEN...Until 6 AM EDT Saturday.

* IMPACTS...Strong winds will cause hazardous waves which could
  capsize or damage vessels.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should remain in port, alter course, and/or secure the
vessel for severe conditions.

&&

$$

ANZ533-541-542-301930-
/O.CON.KLWX.GL.W.0016.000000T0000Z-210501T1000Z/
Chesapeake Bay from North Beach to Drum Point MD-
Choptank River to Cambridge MD and the Little Choptank River-
Patuxent River to Broomes Island MD-
718 AM EDT Fri Apr 30 2021

...GALE WARNING REMAINS IN EFFECT UNTIL 6 AM EDT SATURDAY...

* WHAT...Northwest winds 20 to 30 kt with gusts up to 45 kt and 
  waves 2 to 5 ft.

* WHERE...Patuxent River to Broomes Island MD, Choptank River to 
  Cambridge MD and the Little Choptank River, and Chesapeake Bay 
  from North Beach to Drum Point MD.

* WHEN...Until 6 AM EDT Saturday.

* IMPACTS...Strong winds will cause hazardous waves which could 
  capsize or damage vessels.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should remain in port, alter course, and/or secure the
vessel for severe conditions.

&&

$$

ANZ530>532-538>540-301930-
/O.CON.KLWX.SR.W.0001.000000T0000Z-210501T1000Z/
Chesapeake Bay north of Pooles Island MD-
Chesapeake Bay from Pooles Island to Sandy Point MD-
Chesapeake Bay from Sandy Point to North Beach MD-
Patapsco River including Baltimore Harbor-
Chester River to Queenstown MD-Eastern Bay-
718 AM EDT Fri Apr 30 2021

...STORM WARNING REMAINS IN EFFECT UNTIL 6 AM EDT SATURDAY...

* WHAT...Northwest winds 20 to 35 kt with gusts up to 50 kt and 
  waves 2 to 5 ft.

* WHERE...Chesapeake Bay north of North Beach MD, Chester River 
  to Queenstown MD, Patapsco River including Baltimore Harbor, 
  and Eastern Bay.

* WHEN...Until 6 AM EDT Saturday.

* IMPACTS...Very strong winds will cause hazardous waves which 
  could capsize or damage vessels.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should remain in port, alter course, and/or secure the
vessel for severe conditions.

&&

$$

DHOF

736 
WHUS71 KLWX 301345
MWWLWX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Baltimore MD/Washington DC
945 AM EDT Fri Apr 30 2021

ANZ535-302145-
/O.UPG.KLWX.GL.W.0016.000000T0000Z-210501T1000Z/
/O.EXA.KLWX.SR.W.0001.000000T0000Z-210501T1000Z/
Tidal Potomac from Key Bridge to Indian Head MD-
945 AM EDT Fri Apr 30 2021

...STORM WARNING IN EFFECT UNTIL 6 AM EDT SATURDAY...

* WHAT...Northwest winds 20 to 30 kt with gusts up to 50 kt and
  waves of 2 to 3 feet.

* WHERE...Tidal Potomac from Key Bridge to Indian Head MD.

* WHEN...Until 6 AM EDT Saturday.

* IMPACTS...Very strong winds will cause hazardous waves which 
  could capsize or damage vessels.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should remain in port, alter course, and/or secure the
vessel for severe conditions.

&&

$$

ANZ534-536-537-543-302145-
/O.CON.KLWX.GL.W.0016.000000T0000Z-210501T1000Z/
Chesapeake Bay from Drum Point MD to Smith Point VA-
Tidal Potomac from Indian Head to Cobb Island MD-
Tidal Potomac from Cobb Island MD to Smith Point VA-
Tangier Sound and the inland waters surrounding Bloodsworth
Island-
945 AM EDT Fri Apr 30 2021

...GALE WARNING REMAINS IN EFFECT UNTIL 6 AM EDT SATURDAY...

* WHAT...Northwest winds 20 to 30 kt with gusts up to 45 kt and 
  waves 3 to 6 ft.

* WHERE...Tidal Potomac River from Indian Head MD to Smith Point 
  VA, Tangier Sound and the inland waters surrounding 
  Bloodsworth Island, and Chesapeake Bay from Drum Point MD to 
  Smith Point VA.

* WHEN...Until 6 AM EDT Saturday.

* IMPACTS...Strong winds will cause hazardous waves which could 
  capsize or damage vessels.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should remain in port, alter course, and/or secure the
vessel for severe conditions.

&&

$$

ANZ533-541-542-302145-
/O.CON.KLWX.GL.W.0016.000000T0000Z-210501T1000Z/
Chesapeake Bay from North Beach to Drum Point MD-
Choptank River to Cambridge MD and the Little Choptank River-
Patuxent River to Broomes Island MD-
945 AM EDT Fri Apr 30 2021

...GALE WARNING REMAINS IN EFFECT UNTIL 6 AM EDT SATURDAY...

* WHAT...Northwest winds 20 to 30 kt with gusts up to 45 kt and 
  waves 2 to 5 ft.

* WHERE...Patuxent River to Broomes Island MD, Choptank River to 
  Cambridge MD and the Little Choptank River and Chesapeake Bay 
  from North Beach to Drum Point MD.

* WHEN...Until 6 AM EDT Saturday.

* IMPACTS...Strong winds will cause hazardous waves which could 
  capsize or damage vessels.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should remain in port, alter course, and/or secure the
vessel for severe conditions.

&&

$$

ANZ530>532-538>540-302145-
/O.CON.KLWX.SR.W.0001.000000T0000Z-210501T1000Z/
Chesapeake Bay north of Pooles Island MD-
Chesapeake Bay from Pooles Island to Sandy Point MD-
Chesapeake Bay from Sandy Point to North Beach MD-
Patapsco River including Baltimore Harbor-
Chester River to Queenstown MD-Eastern Bay-
945 AM EDT Fri Apr 30 2021

...STORM WARNING REMAINS IN EFFECT UNTIL 6 AM EDT SATURDAY...

* WHAT...Northwest winds 20 to 35 kt with gusts up to 50 kt and 
  waves 2 to 5 ft.

* WHERE...Chesapeake Bay north of North Beach MD, Chester River 
  to Queenstown MD, Patapsco River including Baltimore Harbor, 
  and Eastern Bay.

* WHEN...Until 6 AM EDT Saturday.

* IMPACTS...Very strong winds will cause hazardous waves which 
  could capsize or damage vessels.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should remain in port, alter course, and/or secure the
vessel for severe conditions.

&&

$$

DHOF

719 
WHUS71 KLWX 302053
MWWLWX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Baltimore MD/Washington DC
453 PM EDT Fri Apr 30 2021

ANZ534-536-537-543-010500-
/O.CON.KLWX.GL.W.0016.000000T0000Z-210501T1000Z/
Chesapeake Bay from Drum Point MD to Smith Point VA-
Tidal Potomac from Indian Head to Cobb Island MD-
Tidal Potomac from Cobb Island MD to Smith Point VA-
Tangier Sound and the inland waters surrounding Bloodsworth
Island-
453 PM EDT Fri Apr 30 2021

...GALE WARNING REMAINS IN EFFECT UNTIL 6 AM EDT SATURDAY...

* WHAT...Northwest winds 20 to 30 kt with gusts up to 45 kt and 
  waves 3 to 6 ft.

* WHERE...Tidal Potomac River from Indian Head MD to Smith Point 
  VA, Tangier Sound and the inland waters surrounding 
  Bloodsworth Island, and Chesapeake Bay from Drum Point MD to 
  Smith Point VA.

* WHEN...Until 6 AM EDT Saturday.

* IMPACTS...Strong winds will cause hazardous waves which could 
  capsize or damage vessels.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should alter plans to avoid these hazardous conditions.
Remain in port, seek safe harbor, alter course, and/or secure the
vessel for severe conditions.

&&

$$

ANZ533-541-542-010500-
/O.CON.KLWX.GL.W.0016.000000T0000Z-210501T1000Z/
Chesapeake Bay from North Beach to Drum Point MD-
Choptank River to Cambridge MD and the Little Choptank River-
Patuxent River to Broomes Island MD-
453 PM EDT Fri Apr 30 2021

...GALE WARNING REMAINS IN EFFECT UNTIL 6 AM EDT SATURDAY...

* WHAT...Northwest winds 20 to 30 kt with gusts up to 45 kt and 
  waves 2 to 5 ft.

* WHERE...Patuxent River to Broomes Island MD, Choptank River to 
  Cambridge MD and the Little Choptank River and Chesapeake Bay 
  from North Beach to Drum Point MD.

* WHEN...Until 6 AM EDT Saturday.

* IMPACTS...Strong winds will cause hazardous waves which could 
  capsize or damage vessels.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should alter plans to avoid these hazardous conditions.
Remain in port, seek safe harbor, alter course, and/or secure the
vessel for severe conditions.

&&

$$

ANZ530>532-535-538>540-010500-
/O.CON.KLWX.SR.W.0001.000000T0000Z-210501T1000Z/
Chesapeake Bay north of Pooles Island MD-
Chesapeake Bay from Pooles Island to Sandy Point MD-
Chesapeake Bay from Sandy Point to North Beach MD-
Tidal Potomac from Key Bridge to Indian Head MD-
Patapsco River including Baltimore Harbor-
Chester River to Queenstown MD-Eastern Bay-
453 PM EDT Fri Apr 30 2021

...STORM WARNING REMAINS IN EFFECT UNTIL 6 AM EDT SATURDAY...

* WHAT...Northwest winds 20 to 35 kt with gusts up to 50 kt and 
  waves 2 to 5 ft.

* WHERE...Chesapeake Bay north of North Beach MD, Chester River 
  to Queenstown MD, Patapsco River including Baltimore Harbor, 
  Tidal Potomac from Key Bridge to Indian Head MD, and Eastern 
  Bay.

* WHEN...Until 6 AM EDT Saturday.

* IMPACTS...Very strong winds will cause hazardous waves which 
  could capsize or damage vessels.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should remain in port, alter course, and/or secure the
vessel for severe conditions.

&&

$$

316 
WHUS71 KLWX 010054
MWWLWX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Baltimore MD/Washington DC
854 PM EDT Fri Apr 30 2021

ANZ530>532-535-538>540-010900-
/O.CAN.KLWX.SR.W.0001.000000T0000Z-210501T1000Z/
/O.EXA.KLWX.GL.W.0016.000000T0000Z-210501T1000Z/
Chesapeake Bay north of Pooles Island MD-
Chesapeake Bay from Pooles Island to Sandy Point MD-
Chesapeake Bay from Sandy Point to North Beach MD-
Tidal Potomac from Key Bridge to Indian Head MD-
Patapsco River including Baltimore Harbor-
Chester River to Queenstown MD-Eastern Bay-
854 PM EDT Fri Apr 30 2021

...GALE WARNING IN EFFECT UNTIL 6 AM EDT SATURDAY...
...STORM WARNING IS CANCELLED...

* WHAT...Northwest winds 15 to 25 kt with gusts up to 45 kt and 
  waves 2 to 5 ft.

* WHERE...Chesapeake Bay north of North Beach MD, Tidal Potomac 
  from Key Bridge to Indian Head MD, Patapsco River including 
  Baltimore Harbor, Chester River to Queenstown MD, and Eastern 
  Bay.

* WHEN...Until 6 AM EDT Saturday.

* IMPACTS...Strong winds will cause hazardous waves which could 
  capsize or damage vessels.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should alter plans to avoid these hazardous conditions.
Remain in port, seek safe harbor, alter course, and/or secure the
vessel for severe conditions.

&&

$$

ANZ534-536-537-543-010900-
/O.CON.KLWX.GL.W.0016.000000T0000Z-210501T1000Z/
Chesapeake Bay from Drum Point MD to Smith Point VA-
Tidal Potomac from Indian Head to Cobb Island MD-
Tidal Potomac from Cobb Island MD to Smith Point VA-
Tangier Sound and the inland waters surrounding Bloodsworth
Island-
854 PM EDT Fri Apr 30 2021

...GALE WARNING REMAINS IN EFFECT UNTIL 6 AM EDT SATURDAY...

* WHAT...Northwest winds 20 to 30 kt with gusts up to 45 kt and 
  waves 3 to 6 ft.

* WHERE...Tidal Potomac River from Indian Head MD to Smith Point 
  VA, Tangier Sound and the inland waters surrounding 
  Bloodsworth Island, and Chesapeake Bay from Drum Point MD to 
  Smith Point VA.

* WHEN...Until 6 AM EDT Saturday.

* IMPACTS...Strong winds will cause hazardous waves which could 
  capsize or damage vessels.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should alter plans to avoid these hazardous conditions.
Remain in port, seek safe harbor, alter course, and/or secure the
vessel for severe conditions.

&&

$$

ANZ533-541-542-010900-
/O.CON.KLWX.GL.W.0016.000000T0000Z-210501T1000Z/
Chesapeake Bay from North Beach to Drum Point MD-
Choptank River to Cambridge MD and the Little Choptank River-
Patuxent River to Broomes Island MD-
854 PM EDT Fri Apr 30 2021

...GALE WARNING REMAINS IN EFFECT UNTIL 6 AM EDT SATURDAY...

* WHAT...Northwest winds 20 to 25 kt with gusts up to 45 kt and 
  waves 2 to 5 ft.

* WHERE...Patuxent River to Broomes Island MD, Choptank River to 
  Cambridge MD and the Little Choptank River and Chesapeake Bay 
  from North Beach to Drum Point MD.

* WHEN...Until 6 AM EDT Saturday.

* IMPACTS...Strong winds will cause hazardous waves which could 
  capsize or damage vessels.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should alter plans to avoid these hazardous conditions.
Remain in port, seek safe harbor, alter course, and/or secure the
vessel for severe conditions.

&&

$$

The office that day

Everything else NWS Baltimore/Washington issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 29, 8:18 PM EDT	High Wind Warning	LWX	Albemarle, Amherst, Arlington, Augusta, Fairfax, Greene and 12 more	25 hr
Apr 29, 8:18 PM EDT	Wind Advisory	LWX	Albemarle, Amherst, Arlington, Augusta, Clarke, Culpeper and 24 more	30 hr
Apr 29, 10:32 PM EDT	Special Marine Warning	LWX		99 min
Apr 29, 10:34 PM EDT	Special Marine Warning	LWX		116 min
Apr 29, 11:20 PM EDT	Special Marine Warning	LWX		115 min
Apr 29, 11:25 PM EDT	Special Marine Warning	LWX		2 hr
Apr 29, 11:53 PM EDT	Special Marine Warning	LWX		2 hr
Apr 30, 12:09 AM EDT	Special Marine Warning	LWX		2 hr
Apr 30, 12:24 PM EDT	Red Flag Warning	LWX	Orange, Spotsylvania, City of Fredericksburg	7 hr
Apr 30, 12:29 PM EDT	Freeze Warning	LWX	Highland	21 hr
Apr 30, 4:31 PM EDT	Severe Thunderstorm Warning	LWX	Loudoun	29 min
Apr 30, 4:36 PM EDT	Special Marine Warning	LWX		59 min
Apr 30, 4:38 PM EDT	Special Marine Warning	LWX		49 min
Apr 30, 4:39 PM EDT	Severe Thunderstorm Warning	LWX	Arlington, Fairfax, Fauquier, Loudoun, Prince William, City of Alexandria and 4 more	36 min
Apr 30, 5:05 PM EDT	Special Marine Warning	LWX		45 min
Apr 30, 5:08 PM EDT	Special Marine Warning	LWX		54 min
Apr 30, 5:11 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Calvert, Charles, Prince George's, Saint Mary's	34 min

Nearby

Storm Warnings in Virginia, 2021 Every storm warning in 2021

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text.