Small Craft Advisory 85, NWS Baltimore/Washington

062 
WHUS71 KLWX 210957
MWWLWX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Baltimore MD/Washington DC
557 AM EDT Wed Apr 21 2021

ANZ530>534-536>543-211800-
/O.EXP.KLWX.SC.Y.0083.000000T0000Z-210421T1000Z/
/O.CON.KLWX.GL.W.0014.210421T1000Z-210422T1000Z/
/O.CON.KLWX.SC.Y.0085.210422T1000Z-210422T2200Z/
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-
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-
Patapsco River including Baltimore Harbor-
Chester River to Queenstown MD-Eastern Bay-
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-
557 AM EDT Wed Apr 21 2021

...GALE WARNING REMAINS IN EFFECT UNTIL 6 AM EDT THURSDAY...
...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 6 AM TO 6 PM EDT
THURSDAY...

* WHAT...For the Gale Warning, west to northwest winds 15 to 25 kt
  with gusts up to 35 kt and waves 2 to 4 ft expected. For the
  Small Craft Advisory, west to northwest winds 10 to 20 kt with 
  gusts up to 30 kt expected.

* WHERE...Tidal Potomac River from Indian Head MD to Smith Point 
  VA, and Chesapeake Bay and adjoining estuaries north of Smith 
  Point VA.

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

* 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.

&&

$$

ANZ535-211800-
/O.EXP.KLWX.SC.Y.0084.000000T0000Z-210421T1000Z/
/O.CON.KLWX.GL.W.0014.210421T1000Z-210422T1000Z/
/O.CON.KLWX.SC.Y.0085.210422T1000Z-210422T2200Z/
Tidal Potomac from Key Bridge to Indian Head MD-
557 AM EDT Wed Apr 21 2021

...GALE WARNING REMAINS IN EFFECT UNTIL 6 AM EDT THURSDAY...
...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 6 AM TO 6 PM EDT
THURSDAY...

* WHAT...For the Gale Warning, west to northwest winds 15 to 25 kt
  with gusts up to 35 kt expected. For the Small Craft Advisory,
  west to northwest winds 10 to 20 kt with gusts up to 30 kt 
  expected.

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

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

* 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.

&&

$$

710 
WHUS71 KLWX 211808
MWWLWX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Baltimore MD/Washington DC
208 PM EDT Wed Apr 21 2021

ANZ530>543-220500-
/O.CON.KLWX.GL.W.0014.000000T0000Z-210422T1000Z/
/O.CON.KLWX.SC.Y.0085.210422T1000Z-210422T2200Z/
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-
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-
Patapsco River including Baltimore Harbor-
Chester River to Queenstown MD-Eastern Bay-
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-
208 PM EDT Wed Apr 21 2021

...GALE WARNING REMAINS IN EFFECT UNTIL 6 AM EDT THURSDAY...
...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 6 AM TO 6 PM EDT
THURSDAY...

* WHAT...For the Gale Warning, northwest winds 15 to 25 kt with 
  gusts up to 35 kt and waves 2 to 4 ft. For the Small Craft 
  Advisory, west winds 15 to 20 kt with gusts up to 30 kt 
  expected.

* WHERE...Tidal Potomac River from Key Bridge to Smith Point VA, 
  and Chesapeake Bay and adjoining estuaries north of Smith 
  Point VA.

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

* 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.

&&

$$

820 
WHUS71 KLWX 220140
MWWLWX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Baltimore MD/Washington DC
940 PM EDT Wed Apr 21 2021

ANZ530>543-220945-
/O.CON.KLWX.GL.W.0014.000000T0000Z-210422T1000Z/
/O.CON.KLWX.SC.Y.0085.210422T1000Z-210422T2200Z/
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-
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-
Patapsco River including Baltimore Harbor-
Chester River to Queenstown MD-Eastern Bay-
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-
940 PM EDT Wed Apr 21 2021

...GALE WARNING REMAINS IN EFFECT UNTIL 6 AM EDT THURSDAY...
...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 6 AM TO 6 PM EDT
THURSDAY...

* WHAT...For the Gale Warning, northwest winds 15 to 25 kt with 
  gusts up to 35 kt and waves 2 to 4 ft. For the Small Craft 
  Advisory, west winds 15 to 20 kt with gusts up to 30 kt 
  expected.

* WHERE...Tidal Potomac River from Key Bridge to Smith Point VA, 
  and Chesapeake Bay and adjoining estuaries north of Smith 
  Point VA.

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

* 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.

&&

$$

776 
WHUS71 KLWX 220255
MWWLWX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Baltimore MD/Washington DC
1055 PM EDT Wed Apr 21 2021

ANZ530>532-535-536-538>540-221100-
/O.CAN.KLWX.GL.W.0014.000000T0000Z-210422T1000Z/
/O.EXT.KLWX.SC.Y.0085.210422T0255Z-210422T2200Z/
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-
Tidal Potomac from Indian Head to Cobb Island MD-
Patapsco River including Baltimore Harbor-
Chester River to Queenstown MD-Eastern Bay-
1055 PM EDT Wed Apr 21 2021

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 6 PM EDT THURSDAY...
...GALE WARNING IS CANCELLED...

* WHAT...West winds 10 to 20 kt with gusts up to 30 kt.

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

* WHEN...Until 6 PM EDT Thursday.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

ANZ533-534-537-541>543-221100-
/O.CON.KLWX.GL.W.0014.000000T0000Z-210422T1000Z/
/O.CON.KLWX.SC.Y.0085.210422T1000Z-210422T2200Z/
Chesapeake Bay from North Beach to Drum Point MD-
Chesapeake Bay from Drum Point MD to Smith Point VA-
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-
1055 PM EDT Wed Apr 21 2021

...GALE WARNING REMAINS IN EFFECT UNTIL 6 AM EDT THURSDAY...
...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 6 AM TO 6 PM EDT
THURSDAY...

* WHAT...For the Gale Warning, northwest winds 15 to 25 kt with 
  gusts up to 35 kt and waves 2 to 4 ft. For the Small Craft 
  Advisory, west winds 15 to 20 kt with gusts up to 30 kt 
  expected.

* WHERE...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, Choptank River 
  to Cambridge MD and the Little Choptank River, and Tidal 
  Potomac from Cobb Island MD to Smith Point VA.

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

* 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.

&&

$$

163 
WHUS71 KLWX 220542
MWWLWX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Baltimore MD/Washington DC
142 AM EDT Thu Apr 22 2021

ANZ533-534-537-541>543-222030-
/O.CON.KLWX.GL.W.0014.000000T0000Z-210422T1000Z/
/O.CON.KLWX.SC.Y.0085.210422T1000Z-210422T2200Z/
Chesapeake Bay from North Beach to Drum Point MD-
Chesapeake Bay from Drum Point MD to Smith Point VA-
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-
142 AM EDT Thu Apr 22 2021

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

* WHAT...For the Gale Warning, northwest winds 15 to 25 kt with 
  gusts up to 35 kt and waves 2 to 4 ft. For the Small Craft 
  Advisory, west winds 15 to 20 kt with gusts up to 30 kt 
  expected.

* WHERE...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, Choptank River 
  to Cambridge MD and the Little Choptank River, and Tidal 
  Potomac from Cobb Island MD to Smith Point VA.

* WHEN...For the Gale Warning, until 6 AM EDT early this 
  morning. For the Small Craft Advisory, from 6 AM this morning 
  to 6 PM EDT this evening.

* 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>532-535-536-538>540-222030-
/O.CON.KLWX.SC.Y.0085.000000T0000Z-210422T2200Z/
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-
Tidal Potomac from Indian Head to Cobb Island MD-
Patapsco River including Baltimore Harbor-
Chester River to Queenstown MD-Eastern Bay-
142 AM EDT Thu Apr 22 2021

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 PM EDT THIS
EVENING...

* WHAT...West winds 10 to 20 kt with gusts up to 30 kt.

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

* WHEN...Until 6 PM EDT this evening.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

002 
WHUS71 KLWX 220658
MWWLWX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Baltimore MD/Washington DC
258 AM EDT Thu Apr 22 2021

ANZ533-534-537-541>543-221500-
/O.CON.KLWX.GL.W.0014.000000T0000Z-210422T1000Z/
/O.EXT.KLWX.SC.Y.0085.210422T1000Z-210423T1000Z/
Chesapeake Bay from North Beach to Drum Point MD-
Chesapeake Bay from Drum Point MD to Smith Point VA-
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-
258 AM EDT Thu Apr 22 2021

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

* WHAT...For the Gale Warning, northwest winds 15 to 25 kt with
  gusts up to 35 kt and waves 2 to 4 ft. For the Small Craft
  Advisory, west winds 15 to 20 kt with gusts up to 30 kt
  expected, decreasing to 10 to 15 kt with gusts to 20 kt 
  overnight.

* WHERE...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, Choptank River 
  to Cambridge MD and the Little Choptank River, and Tidal 
  Potomac from Cobb Island MD to Smith Point VA.

* WHEN...For the Gale Warning, until 6 AM EDT early this 
  morning. For the Small Craft Advisory, from 6 AM this morning 
  to 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>532-536-538>540-221500-
/O.EXT.KLWX.SC.Y.0085.000000T0000Z-210423T1000Z/
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 Indian Head to Cobb Island MD-
Patapsco River including Baltimore Harbor-
Chester River to Queenstown MD-Eastern Bay-
258 AM EDT Thu Apr 22 2021

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 6 AM EDT FRIDAY...

* WHAT...West winds 15 to 20 kt with gusts up to 30 kt, decreasing
  to 10 to 15 kt with gusts to 20 kt overnight.

* WHERE...Tidal Potomac River from Key Bridge to Cobb Island MD, 
  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 Friday.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

ANZ535-221500-
/O.EXT.KLWX.SC.Y.0085.000000T0000Z-210423T0400Z/
Tidal Potomac from Key Bridge to Indian Head MD-
258 AM EDT Thu Apr 22 2021

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL MIDNIGHT EDT
TONIGHT...

* WHAT...West winds 15 to 20 kt with gusts up to 30 kt, decreasing
  to 10 to 15 kt with gusts to 20 kt this evening.

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

* WHEN...Until midnight EDT tonight.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

615 
WHUS71 KLWX 221012
MWWLWX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Baltimore MD/Washington DC
612 AM EDT Thu Apr 22 2021

ANZ533-534-537-541>543-221815-
/O.EXP.KLWX.GL.W.0014.000000T0000Z-210422T1000Z/
/O.CON.KLWX.SC.Y.0085.000000T0000Z-210423T1000Z/
Chesapeake Bay from North Beach to Drum Point MD-
Chesapeake Bay from Drum Point MD to Smith Point VA-
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-
612 AM EDT Thu Apr 22 2021

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 AM EDT FRIDAY...
...GALE WARNING HAS EXPIRED...

* WHAT...West winds 15 to 20 kt with gusts up to 30 kt, 
  decreasing to 10 to 15 kt with gusts to 20 kt overnight.

* WHERE...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, Choptank River 
  to Cambridge MD and the Little Choptank River, and Tidal 
  Potomac from Cobb Island MD to Smith Point VA.

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

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

ANZ530>532-536-538>540-221815-
/O.CON.KLWX.SC.Y.0085.000000T0000Z-210423T1000Z/
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 Indian Head to Cobb Island MD-
Patapsco River including Baltimore Harbor-
Chester River to Queenstown MD-Eastern Bay-
612 AM EDT Thu Apr 22 2021

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 AM EDT FRIDAY...

* WHAT...West winds 15 to 20 kt with gusts up to 30 kt, 
  decreasing to 10 to 15 kt with gusts to 20 kt overnight.

* WHERE...Tidal Potomac River from Key Bridge to Cobb Island MD, 
  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 Friday.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

ANZ535-221815-
/O.CON.KLWX.SC.Y.0085.000000T0000Z-210423T0400Z/
Tidal Potomac from Key Bridge to Indian Head MD-
612 AM EDT Thu Apr 22 2021

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT EDT
TONIGHT...

* WHAT...West winds 15 to 20 kt with gusts up to 30 kt, 
  decreasing to 10 to 15 kt with gusts to 20 kt this evening.

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

* WHEN...Until midnight EDT tonight.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

724 
WHUS71 KLWX 221153
MWWLWX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Baltimore MD/Washington DC
753 AM EDT Thu Apr 22 2021

ANZ530>534-536>543-222000-
/O.CON.KLWX.SC.Y.0085.000000T0000Z-210423T1000Z/
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-
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-
Patapsco River including Baltimore Harbor-
Chester River to Queenstown MD-Eastern Bay-
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-
753 AM EDT Thu Apr 22 2021

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 AM EDT FRIDAY...

* WHAT...West winds 15 to 25 kt with gusts up to 30 kt, decreasing
  to 10 to 15 kt with gusts up to 20 kt tonight.

* WHERE...Tidal Potomac River from Indian Head MD to Smith Point 
  VA, and Chesapeake Bay and adjoining estuaries north of Smith 
  Point VA.

* WHEN...Until 6 AM EDT Friday.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

ANZ535-222000-
/O.CON.KLWX.SC.Y.0085.000000T0000Z-210423T0400Z/
Tidal Potomac from Key Bridge to Indian Head MD-
753 AM EDT Thu Apr 22 2021

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT EDT
TONIGHT...

* WHAT...West winds 15 to 25 kt with gusts up to 30 kt, decreasing
  to 10 to 15 kt with gusts up to 20 kt this evening.

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

* WHEN...Until midnight EDT tonight.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

DHOF

852 
WHUS71 KLWX 221433
MWWLWX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Baltimore MD/Washington DC
1033 AM EDT Thu Apr 22 2021

ANZ535-222245-
/O.UPG.KLWX.SC.Y.0085.000000T0000Z-210423T0400Z/
/O.NEW.KLWX.GL.W.0015.210422T1433Z-210422T2200Z/
/O.NEW.KLWX.SC.Y.0086.210422T2200Z-210423T0400Z/
Tidal Potomac from Key Bridge to Indian Head MD-
1033 AM EDT Thu Apr 22 2021

...GALE WARNING IN EFFECT UNTIL 6 PM EDT THIS EVENING...
...SMALL CRAFT ADVISORY IN EFFECT FROM 6 PM THIS EVENING TO
MIDNIGHT EDT TONIGHT...

* WHAT...For the Gale Warning, west winds 15 to 25 kt with gusts
  up to 35 kt. For the Small Craft Advisory, west winds 10 to 15
  kt with gusts up to 20 kt.

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

* WHEN...For the Gale Warning, until 6 PM EDT this evening. For 
  the Small Craft Advisory, from 6 PM this evening to midnight 
  EDT tonight.

* 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>534-536>543-222245-
/O.CON.KLWX.SC.Y.0085.000000T0000Z-210423T1000Z/
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-
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-
Patapsco River including Baltimore Harbor-
Chester River to Queenstown MD-Eastern Bay-
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-
1033 AM EDT Thu Apr 22 2021

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 AM EDT FRIDAY...

* WHAT...West winds 15 to 25 kt with gusts up to 30 kt,
  diminishing to 10 to 15 kt with gusts up to 20 kt tonight.

* WHERE...Tidal Potomac River from Indian Head MD to Smith Point 
  VA, and Chesapeake Bay and adjoining estuaries north of Smith 
  Point VA.

* WHEN...Until 6 AM EDT Friday.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

DHOF

016 
WHUS71 KLWX 221917
MWWLWX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Baltimore MD/Washington DC
317 PM EDT Thu Apr 22 2021

ANZ535-222345-
/O.CON.KLWX.GL.W.0015.000000T0000Z-210422T2200Z/
/O.CON.KLWX.SC.Y.0086.210422T2200Z-210423T0400Z/
Tidal Potomac from Key Bridge to Indian Head MD-
317 PM EDT Thu Apr 22 2021

...GALE WARNING REMAINS IN EFFECT UNTIL 6 PM EDT THIS EVENING...
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT EDT
TONIGHT...

* WHAT...For the Gale Warning, west winds 15 to 20 kt with gusts 
  up to 30 kt. For the Small Craft Advisory, west winds 10 to 15 
  kt with gusts up to 25 kt expected.

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

* WHEN...For the Gale Warning, until 6 PM EDT this evening. For 
  the Small Craft Advisory, until midnight EDT tonight.

* 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>534-536>543-222345-
/O.CON.KLWX.SC.Y.0085.000000T0000Z-210423T1000Z/
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-
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-
Patapsco River including Baltimore Harbor-
Chester River to Queenstown MD-Eastern Bay-
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-
317 PM EDT Thu Apr 22 2021

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 AM EDT FRIDAY...

* WHAT...West winds 10 to 20 kt with gusts up to 30 kt.

* WHERE...Tidal Potomac River from Indian Head MD to Smith Point 
  VA, and Chesapeake Bay and adjoining estuaries north of Smith 
  Point VA.

* WHEN...Until 6 AM EDT Friday.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

137 
WHUS71 KLWX 222207
MWWLWX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Baltimore MD/Washington DC
607 PM EDT Thu Apr 22 2021

ANZ535-230400-
/O.EXP.KLWX.GL.W.0015.000000T0000Z-210422T2200Z/
/O.CON.KLWX.SC.Y.0086.000000T0000Z-210423T0400Z/
Tidal Potomac from Key Bridge to Indian Head MD-
607 PM EDT Thu Apr 22 2021

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT EDT
TONIGHT...
...GALE WARNING HAS EXPIRED...

* WHAT...West winds 10 to 15 kt with gusts up to 25 kt.

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

* WHEN...Until midnight EDT tonight.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

ANZ530>534-536>543-230615-
/O.CON.KLWX.SC.Y.0085.000000T0000Z-210423T1000Z/
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-
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-
Patapsco River including Baltimore Harbor-
Chester River to Queenstown MD-Eastern Bay-
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-
607 PM EDT Thu Apr 22 2021

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 AM EDT FRIDAY...

* WHAT...West winds 10 to 20 kt with gusts up to 30 kt.

* WHERE...Tidal Potomac River from Indian Head MD to Smith Point 
  VA, and Chesapeake Bay and adjoining estuaries north of Smith 
  Point VA.

* WHEN...Until 6 AM EDT Friday.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

128 
WHUS71 KLWX 230128
MWWLWX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Baltimore MD/Washington DC
928 PM EDT Thu Apr 22 2021

ANZ530>532-536-538>540-542-230230-
/O.CAN.KLWX.SC.Y.0085.000000T0000Z-210423T1000Z/
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 Indian Head to Cobb Island MD-
Patapsco River including Baltimore Harbor-
Chester River to Queenstown MD-Eastern Bay-
Patuxent River to Broomes Island MD-
928 PM EDT Thu Apr 22 2021

...SMALL CRAFT ADVISORY IS CANCELLED...

Winds have dropped below Small Craft Advisory thresholds.

$$

ANZ535-230230-
/O.CAN.KLWX.SC.Y.0086.000000T0000Z-210423T0400Z/
Tidal Potomac from Key Bridge to Indian Head MD-
928 PM EDT Thu Apr 22 2021

...SMALL CRAFT ADVISORY IS CANCELLED...

Winds have dropped below Small Craft Advisory thresholds.

$$

ANZ533-534-537-541-543-230930-
/O.CON.KLWX.SC.Y.0085.000000T0000Z-210423T1000Z/
Chesapeake Bay from North Beach to Drum Point MD-
Chesapeake Bay from Drum Point MD to Smith Point VA-
Tidal Potomac from Cobb Island MD to Smith Point VA-
Choptank River to Cambridge MD and the Little Choptank River-
Tangier Sound and the inland waters surrounding Bloodsworth
Island-
928 PM EDT Thu Apr 22 2021

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 AM EDT FRIDAY...

* WHAT...Northwest winds 10 to 15 kt with gusts up to 20 kt.

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

* WHEN...Until 6 AM EDT Friday.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

501 
WHUS71 KLWX 230717
MWWLWX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Baltimore MD/Washington DC
317 AM EDT Fri Apr 23 2021

ANZ530-531-538-539-231530-
/O.NEW.KLWX.SC.Y.0087.210423T1200Z-210423T2200Z/
Chesapeake Bay north of Pooles Island MD-
Chesapeake Bay from Pooles Island to Sandy Point MD-
Patapsco River including Baltimore Harbor-
Chester River to Queenstown MD-
317 AM EDT Fri Apr 23 2021

...SMALL CRAFT ADVISORY IN EFFECT FROM 8 AM THIS MORNING TO 6 PM
EDT THIS EVENING...

* WHAT...West winds around 10 to 15 kt with gusts up to 20 kt 
  expected.

* WHERE...Chesapeake Bay north of Sandy Point MD, Patapsco River 
  including Baltimore Harbor, and Chester River to Queenstown MD.

* WHEN...From 8 AM this morning to 6 PM EDT this evening.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

ANZ533-534-537-541-543-231200-
/O.EXT.KLWX.SC.Y.0085.000000T0000Z-210423T1200Z/
Chesapeake Bay from North Beach to Drum Point MD-
Chesapeake Bay from Drum Point MD to Smith Point VA-
Tidal Potomac from Cobb Island MD to Smith Point VA-
Choptank River to Cambridge MD and the Little Choptank River-
Tangier Sound and the inland waters surrounding Bloodsworth
Island-
317 AM EDT Fri Apr 23 2021

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 8 AM EDT THIS
MORNING...

* WHAT...West winds 10 to 15 kt with gusts up to 20 kt.

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

* WHEN...Until 8 AM EDT this morning.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

817 
WHUS71 KLWX 230827
MWWLWX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Baltimore MD/Washington DC
427 AM EDT Fri Apr 23 2021

ANZ533-534-537-541-543-231200-
/O.CON.KLWX.SC.Y.0085.000000T0000Z-210423T1200Z/
Chesapeake Bay from North Beach to Drum Point MD-
Chesapeake Bay from Drum Point MD to Smith Point VA-
Tidal Potomac from Cobb Island MD to Smith Point VA-
Choptank River to Cambridge MD and the Little Choptank River-
Tangier Sound and the inland waters surrounding Bloodsworth
Island-
427 AM EDT Fri Apr 23 2021

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 8 AM EDT THIS
MORNING...

* WHAT...West winds 10 to 15 kt with gusts up to 20 kt.

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

* WHEN...Until 8 AM EDT this morning.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

ANZ530-531-538-539-232200-
/O.CON.KLWX.SC.Y.0087.210423T1200Z-210423T2200Z/
Chesapeake Bay north of Pooles Island MD-
Chesapeake Bay from Pooles Island to Sandy Point MD-
Patapsco River including Baltimore Harbor-
Chester River to Queenstown MD-
427 AM EDT Fri Apr 23 2021

...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 8 AM THIS MORNING
TO 6 PM EDT THIS EVENING...

* WHAT...West winds around 10 kt with gusts up to 20 kt expected.

* WHERE...Chesapeake Bay north of Sandy Point MD, Chester River 
  to Queenstown MD, and Patapsco River including Baltimore 
  Harbor.

* WHEN...From 8 AM this morning to 6 PM EDT this evening.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

329 
WHUS71 KLWX 231013
MWWLWX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Baltimore MD/Washington DC
613 AM EDT Fri Apr 23 2021

ANZ532-540-231815-
/O.EXB.KLWX.SC.Y.0087.210423T1013Z-210423T2200Z/
Chesapeake Bay from Sandy Point to North Beach MD-Eastern Bay-
613 AM EDT Fri Apr 23 2021

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 PM EDT THIS EVENING...

* WHAT...West winds 10 to 15 kt with gusts up to 20 kt.

* WHERE...Chesapeake Bay from Sandy Point to North Beach MD and 
  Eastern Bay.

* WHEN...Until 6 PM EDT this evening.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

ANZ530-531-538-539-231815-
/O.EXT.KLWX.SC.Y.0087.210423T1013Z-210423T2200Z/
Chesapeake Bay north of Pooles Island MD-
Chesapeake Bay from Pooles Island to Sandy Point MD-
Patapsco River including Baltimore Harbor-
Chester River to Queenstown MD-
613 AM EDT Fri Apr 23 2021

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 6 PM EDT THIS
EVENING...

* WHAT...West winds around 10 to 15 kt with gusts up to 20 kt 
  expected.

* WHERE...Chesapeake Bay north of Sandy Point MD, Chester River 
  to Queenstown MD, and Patapsco River including Baltimore 
  Harbor.

* WHEN...Until 6 PM EDT this evening.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

ANZ533-534-537-541-543-231200-
/O.CON.KLWX.SC.Y.0085.000000T0000Z-210423T1200Z/
Chesapeake Bay from North Beach to Drum Point MD-
Chesapeake Bay from Drum Point MD to Smith Point VA-
Tidal Potomac from Cobb Island MD to Smith Point VA-
Choptank River to Cambridge MD and the Little Choptank River-
Tangier Sound and the inland waters surrounding Bloodsworth
Island-
613 AM EDT Fri Apr 23 2021

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 8 AM EDT THIS
MORNING...

* WHAT...West winds 10 to 15 kt with gusts up to 20 kt.

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

* WHEN...Until 8 AM EDT this morning.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

247 
WHUS71 KLWX 231144
MWWLWX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Baltimore MD/Washington DC
744 AM EDT Fri Apr 23 2021

ANZ533-534-537-541-543-231245-
/O.EXP.KLWX.SC.Y.0085.000000T0000Z-210423T1200Z/
Chesapeake Bay from North Beach to Drum Point MD-
Chesapeake Bay from Drum Point MD to Smith Point VA-
Tidal Potomac from Cobb Island MD to Smith Point VA-
Choptank River to Cambridge MD and the Little Choptank River-
Tangier Sound and the inland waters surrounding Bloodsworth
Island-
744 AM EDT Fri Apr 23 2021

...SMALL CRAFT ADVISORY WILL EXPIRE AT 8 AM EDT THIS MORNING...

The wind has diminished.

$$

ANZ530>532-538>540-231945-
/O.CON.KLWX.SC.Y.0087.000000T0000Z-210423T2200Z/
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-
744 AM EDT Fri Apr 23 2021

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 PM EDT THIS
EVENING...

* WHAT...West winds around 10 kt with gusts up to 20 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 PM EDT this evening.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

DHOF

Area Forecast Discussion
National Weather Service Baltimore MD/Washington DC
353 AM EDT Wed Apr 21 2021

.SYNOPSIS...
A strong cold front will cross the area today. Canadian high
pressure will build to our west tonight through Thursday before
settling to the south late in the week. Low pressure may will
likely pass through the area this weekend before high pressure
returns early next week.

&&

.NEAR TERM /THROUGH TONIGHT/...
A potent upper-level trough will dig overhead through tonight.
The surface low associated with this will strengthen and track
to our north while a cold front passes through our area
today before moving offshore Wednesday night. A few showers are
possible this morning into early this afternoon along and ahead
of the cold front, with highest confidence for precipitation
being near and east of Interstate 95 and also along/west of the
Allegheny Front (upslope component to low-level flow). The
forcing along the front will be strong, so a line of gusty
showers and perhaps a severe thunderstorm is most likely to
setup to our east where instability will be higher due to the
later time of the frontal passage. However, there still is an
isolated threat for a severe storm in our area anywhere from
near I-95 to the Bay.

A mild southerly flow ahead of the cold front will give way to
sharply colder conditions (temps will fall from the 50s and 60s
to the 40s and 50s quickly with the frontal passage) and gusty
northwest winds of 25 to 40 mph. The cold front will move east
of the Allegheny Highlands by 8 AM, then through the I-81
corridor to the Blue Ridge Mountains between 8 AM and 11 AM,
then through the metro areas between 11 AM and 1 PM, and
clearing extreme southern MD and the nearby water zones between
2 PM and 4 PM.

The upper-level trough will remain overhead tonight allowing
for blustery and cold conditions for this time of year. A Freeze
Warning is in effect for northern MD and locations near/west of
the Blue Ridge Mountains where the growing season is in effect.
It will be close in the valleys with temperatures around 32
degrees. There is a possibility that wind and some clouds may
keep temperatures up, but the air aloft will be quite cold and
there may even be a little break in the winds toward sunrise.
Therefore, a Freeze Warning has been issued. Temperatures in the
ridges will be well below freezing.

For locations along and west of the Allegheny Front, the strong
cold advection and upslope flow will result rain showers
changing to snow showers later this morning into this afternoon.
Scattered snow showers will continue tonight. There will be some
instability, and that is causing elevated numbers in the snow
squall parameter. Heavier bursts of snow are likely especially
this afternoon and evening. The warmer ground and antecedent
conditions will limit snowfall accumulations, but 1-2" are
possible for the higher ridge tops above 3kft through tonight. A
few rain or snow showers may even spill east of the mountains
due to the high inversion and instability. However, any
precipitation will be light.

&&

.SHORT TERM /THURSDAY THROUGH FRIDAY NIGHT/...
The upper-level trough will remain overhead Thursday while low
pressure slowly tracks into the Canadian Maritimes. Gusty
northwest winds are expected and it will be quite chilly for
this time of year. A few snow showers are expected along/west of
the Allegheny Front and a rain/snow shower could spill east of
the mountains as well. Winds will diminish Thursday night as the
upper-level trough departs and high pressure builds nearby to
the south and west. More chilly conditions are expected and
frost/freeze headlines may be warranted.

High pressure will build to the south for Friday and Friday
night, and a return flow will allow for more seasonable
conditions along with some sunshine for Friday.

&&

.LONG TERM /SATURDAY THROUGH TUESDAY/...
Conditions will start out dry on Saturday, but rain is expected to
overspread the area from southwest to northeast during the
afternoon and evening hours as an area of low pressure
approaches from the southwest. There are some subtle differences
in the track of the low amongst model guidance, but little
sensible differences in terms of impact, with nearly all
deterministic and ensemble solutions showing a soaking rain
across the area Saturday afternoon through Saturday night. With
the low tracking nearby and a large shield of stratiform shield
of precipitation preceding it, we should be stable. As a result,
severe thunderstorms shouldn't be a concern. Flooding isn't
expected to be a concern either, with dry antecedent conditions,
and precipitation totals generally under an inch.

The aforementioned area of low pressure and its associated
shortwave trough will progress off to our east on Sunday. This
should lead to clearing skies throughout the day. The main
weather feature of note on Sunday will be winds. Gusts of 30-40
mph appear possible at times in northwesterly flow behind the
departing area of low pressure. Temperatures on Sunday are
expected to max out in the 60s for most.

The mid-upper level flow pattern across the CONUS is expected to
amplify early next week as a trough digs into the western US.
Heights will rise downstream of this trough, with a ridge
building over the Great Lakes for Monday and Tuesday. This will
place us in northwesterly flow aloft, which will encourage the
maintenance of high pressure at the surface and quiet weather
conditions. Sunny skies are in the forecast for both Monday and
Tuesday, with a moderating trend in temperatures anticipated.
Highs will reach well into the 70s by Tuesday.

&&

.AVIATION /07Z WEDNESDAY THROUGH SUNDAY/...
VFR conditions are expected through Friday night. An isolated
shower or perhaps even a thunderstorm is possible across the
eastern terminals through midday. However, confidence for a
stronger storm has lowered with the more favorable setup being
to the east. Will continue to monitor, especially for KBWI,
KMTN, and KDCA because it will be close.

A wind shift to the west and northwest with gusts around 25 to
35 knots is expected behind the frontal passage later this
morning through early this afternoon. The gusty winds will
continue this evening before diminishing some overnight and then
picking back up for Thursday.

Winds will diminish Thursday night as high pressure settles to
our south. A lighter  return flow is expected Friday into
Friday night.

VFR conditions are expected for the first half of Saturday.
Conditions may drop to sub-VFR Saturday afternoon through
Saturday night as rain and low clouds move in. A return to VFR
conditions is expected on Sunday, along with gusty
northwesterly winds.

&&

.MARINE...
A cold front will pass through the waters late this morning
through mid-afternoon. A line of showers and perhaps a gusty
thunderstorm is possible ahead of the cold front. Special Marine
Warnings may be warranted.

Winds will shift to the west and northwest behind the front with
gusts up to 35 knots expected. A Gale Warning is in effect for
the waters today through tonight, but the strongest winds are
most likely later this afternoon through this evening.

More gusty winds are expected for Thursday, but confidence is
too low for a Gale Warning at this time due to a slightly weaker
wind field aloft. However, gusts around 30 knots are expected
and an SCA is in effect. Winds will diminish some for Thursday
night and Friday, but an SCA may still be needed for portions of
the waters. High pressure will settle nearby to the south Friday
night.

SCA level winds appear possible on Saturday in southerly flow. At
least SCA level winds appear likely on Sunday in northwesterly flow.
Gale conditions may be possible, but surface temperatures warmer
than water temperatures could be a limiting factor.

&&

.FIRE WEATHER...
A strong cold front will pass through the Shenandoah Valley
late this morning and through the metro areas and VA Piedmont by
early this afternoon. Gusty west to northwest winds and falling
relative humidity is expected behind the cold front. Rainfall,
if any should average out to be light for most areas and fuel
moisture remains low. This may enhance the threat for the spread
of wildfires this afternoon. However, that threat may be limited
somewhat by the recent greenup that has occurred.

&&

.LWX WATCHES/WARNINGS/ADVISORIES...
DC...None.
MD...Freeze Warning from midnight tonight to 9 AM EDT Thursday for
     MDZ003>006-507.
VA...Freeze Warning from midnight tonight to 9 AM EDT Thursday for
     VAZ025>031-040-501-505-507-508.
WV...Freeze Warning from midnight tonight to 9 AM EDT Thursday for
     WVZ051>053.
MARINE...Small Craft Advisory until 6 AM EDT early this morning for
     ANZ530>543.
     Small Craft Advisory from 6 AM to 6 PM EDT Thursday for
     ANZ530>543.
     Gale Warning until 6 AM EDT Thursday for ANZ530>543.

&&

SYNOPSIS...BJL
NEAR TERM...BJL
SHORT TERM...BJL
LONG TERM...KJP
AVIATION...BJL/KJP
MARINE...BJL/KJP
FIRE WEATHER...BJL

Hazardous Weather Outlook
National Weather Service Baltimore MD/Washington DC
1040 PM EDT Tue Apr 20 2021

ANZ530>543-DCZ001-MDZ008-011-013-014-016>018-504-506-508-
VAZ052>057-211000-
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-
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-
Patapsco River including Baltimore Harbor-
Chester River to Queenstown MD-Eastern Bay-
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-District of Columbia-Cecil-Southern Baltimore-
Prince Georges-Anne Arundel-Charles-St. Marys-Calvert-
Central and Southeast Montgomery-Central and Southeast Howard-
Southeast Harford-Prince William/Manassas/Manassas Park-Fairfax-
Arlington/Falls Church/Alexandria-Stafford-Spotsylvania-
King George-
1040 PM EDT Tue Apr 20 2021

This Hazardous Weather Outlook is for the Maryland portion of the
Chesapeake Bay, Tidal Potomac River, and I-95 corridor through
central Maryland, northern Virginia, and District of Columbia.

.DAY ONE...Tonight

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

There is an isolated threat for severe thunderstorms late
Wednesday morning through mid-afternoon with damaging winds being
the primary threat.

A Gale Warning is in effect for all waters from 6 AM Wednesday
until 2 AM Thursday. A Gale Watch is in effect after that through
Thursday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed Wednesday.

MDZ003>006-503-505-507-VAZ025>031-036>040-050-051-501-502-505>508-
WVZ050>053-055-211000-
Washington-Frederick MD-Carroll-Northern Baltimore-
Northwest Montgomery-Northwest Howard-Northwest Harford-Augusta-
Rockingham-Shenandoah-Frederick VA-Page-Warren-Clarke-Nelson-
Albemarle-Greene-Madison-Rappahannock-Orange-Culpeper-
Northern Fauquier-Southern Fauquier-Western Loudoun-
Eastern Loudoun-Northern Virginia Blue Ridge-
Central Virginia Blue Ridge-Hampshire-Morgan-Berkeley-Jefferson-
Hardy-
1040 PM EDT Tue Apr 20 2021

This Hazardous Weather Outlook is for portions of eastern West
Virginia, northern and central Virginia, and central and western
Maryland.

.DAY ONE...Tonight

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

There is an isolated threat for severe thunderstorms Wednesday
morning through early afternoon with damaging winds being the
primary threat. The best chance for a strong to severe storm will
be east of the Blue Ridge and Catoctin Mountains.

A Freeze Watch is in effect for portions of the Shenandoah Valley
and Blue Ridge Mountains Wednesday night into Thursday morning.

Frost or freeze conditions are possible Thursday night into
Friday morning.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed Wednesday.

MDZ001-501-502-VAZ503-504-WVZ501>506-211000-
Garrett-Extreme Western Allegany-Central and Eastern Allegany-
Western Highland-Eastern Highland-Western Grant-Eastern Grant-
Western Mineral-Eastern Mineral-Western Pendleton-
Eastern Pendleton-
1040 PM EDT Tue Apr 20 2021

This Hazardous Weather Outlook is for the Allegheny Front
counties in western Maryland, eastern West Virginia, and Highland
County Virginia.

.DAY ONE...Tonight

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.