Alert archive / California / Small Craft Advisories in 2021

Small Craft Advisory 105, NWS San Francisco Bay Area, CA

May 20, 2021

NWS San Francisco Bay Area, CA issued this small craft advisory at May 20, 2021, 2:56 AM PDT. It was in force for 14 hr.

The area

The counties it named.

The facts

Issued
May 20, 2021, 2:56 AM PDT (09:56 UTC)
Expired
May 20, 2021, 5:02 PM PDT
In force
14 hr
Issued by
NWS San Francisco Bay Area, CA

The text

As transmitted.

459 
WHUS76 KMTR 200956
MWWMTR

URGENT - MARINE WEATHER MESSAGE
National Weather Service San Francisco Bay Area
256 AM PDT Thu May 20 2021

PZZ530-201800-
/O.EXP.KMTR.GL.W.0024.000000T0000Z-210520T1000Z/
/O.NEW.KMTR.SC.Y.0105.210520T1000Z-210520T2200Z/
San Pablo Bay, Suisun Bay, the West Delta and  the San Francisco
Bay north of the Bay Bridge-
256 AM PDT Thu May 20 2021

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 3 PM PDT THIS AFTERNOON...
...GALE WARNING WILL EXPIRE AT 3 AM PDT EARLY THIS MORNING...

* WHAT...Northwest winds 10 to 20 kt with gusts up to 35 kt 
  expected.

* WHERE...San Pablo Bay, Suisun Bay, the West Delta and the San 
  Francisco Bay north of the Bay Bridge.

* WHEN...Until 3 PM PDT this afternoon.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

PZZ531-201800-
/O.EXP.KMTR.GL.W.0024.000000T0000Z-210520T1000Z/
/O.NEW.KMTR.SC.Y.0105.210520T1000Z-210521T0400Z/
San Francisco Bay South of the Bay Bridge-
256 AM PDT Thu May 20 2021

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 9 PM PDT THIS EVENING...
...GALE WARNING WILL EXPIRE AT 3 AM PDT EARLY THIS MORNING...

* WHAT...Northwest winds 15 to 25 kt with gusts up to 35 kt 
  expected.

* WHERE...San Francisco Bay South of the Bay Bridge.

* WHEN...Until 9 PM PDT 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.

&&

$$

PZZ535-201800-
/O.EXP.KMTR.GL.W.0024.000000T0000Z-210520T1000Z/
/O.NEW.KMTR.SC.Y.0105.210520T1000Z-210521T1000Z/
Monterey Bay-
256 AM PDT Thu May 20 2021

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 3 AM PDT FRIDAY...
...GALE WARNING WILL EXPIRE AT 3 AM PDT EARLY THIS MORNING...

* WHAT...Northwest winds 20 to 30 kt with gusts up to 40 kt and 
  seas 6 to 11 feet at 10 seconds expected.

* WHERE...Monterey Bay.

* WHEN...Until 3 AM PDT 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.

&&

$$

PZZ570-201800-
/O.EXT.KMTR.GL.W.0024.000000T0000Z-210521T2200Z/
Waters from Point Arena to Point Reyes 10-60 NM-
256 AM PDT Thu May 20 2021

...GALE WARNING NOW IN EFFECT UNTIL 3 PM PDT FRIDAY...

* WHAT...Northwest winds 25 to 30 kt with gusts up to 45 kt and 
  seas 9 to 12 feet at 11 seconds.

* WHERE...Waters from Point Arena to Point Reyes 10-60 NM.

* WHEN...Until 3 PM PDT Friday.

* IMPACTS...Strong winds will cause hazardous seas which could 
  capsize or damage vessels and reduce visibility.

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.

&&

$$

PZZ571-201800-
/O.EXT.KMTR.GL.W.0024.000000T0000Z-210521T2200Z/
Waters from Point Reyes to Pigeon Point 10-60 NM-
256 AM PDT Thu May 20 2021

...GALE WARNING NOW IN EFFECT UNTIL 3 PM PDT FRIDAY...

* WHAT...Northwest winds 25 to 30 kt with gusts up to 45 kt and 
  seas 10 to 14 feet at 11 seconds.

* WHERE...Waters from Point Reyes to Pigeon Point 10-60 NM.

* WHEN...Until 3 PM PDT Friday.

* IMPACTS...Strong winds will cause hazardous seas which could 
  capsize or damage vessels and reduce visibility.

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.

&&

$$

PZZ575-201800-
/O.CON.KMTR.GL.W.0025.000000T0000Z-210521T1000Z/
Waters from Pigeon Point to Point Pinos 10-60 NM-
256 AM PDT Thu May 20 2021

...GALE WARNING REMAINS IN EFFECT UNTIL 3 AM PDT FRIDAY...

* WHAT...Northwest winds 25 to 30 kt with gusts up to 45 kt and 
  seas 11 to 14 feet at 11 seconds.

* WHERE...Waters from Pigeon Point to Point Pinos 10-60 NM.

* WHEN...Until 3 AM PDT Friday.

* IMPACTS...Strong winds will cause hazardous seas which could 
  capsize or damage vessels and reduce visibility.

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.

&&

$$

PZZ576-201800-
/O.CON.KMTR.GL.W.0024.000000T0000Z-210521T1000Z/
Waters from Point Pinos to Point Piedras Blancas 10-60 NM-
256 AM PDT Thu May 20 2021

...GALE WARNING REMAINS IN EFFECT UNTIL 3 AM PDT FRIDAY...

* WHAT...Northwest winds 25 to 30 kt with gusts up to 40 kt and 
  seas 12 to 14 feet at 11 seconds.

* WHERE...Waters from Point Pinos to Point Piedras Blancas 10- 
  60 NM.

* WHEN...Until 3 AM PDT Friday.

* IMPACTS...Strong winds will cause hazardous seas which could 
  capsize or damage vessels and reduce visibility.

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.

&&

$$

PZZ540-201800-
/O.CON.KMTR.GL.W.0024.000000T0000Z-210521T0400Z/
Coastal Waters from Point Arena to Point Reyes California out to
10 nm-
256 AM PDT Thu May 20 2021

...GALE WARNING REMAINS IN EFFECT UNTIL 9 PM PDT THIS EVENING...

* WHAT...Northwest winds 25 to 35 kt with gusts up to 45 kt and 
  seas 8 to 13 feet at 11 seconds.

* WHERE...Coastal Waters from Point Arena to Point Reyes 
  California out to 10 nm.

* WHEN...Until 9 PM PDT this evening.

* IMPACTS...Strong winds will cause hazardous seas which could 
  capsize or damage vessels and reduce visibility.

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.

&&

$$

PZZ545-201800-
/O.CON.KMTR.GL.W.0025.000000T0000Z-210521T0400Z/
Coastal Waters from Point Reyes to Pigeon Point California out to
10 nm-
256 AM PDT Thu May 20 2021

...GALE WARNING REMAINS IN EFFECT UNTIL 9 PM PDT THIS EVENING...

* WHAT...Northwest winds 25 to 35 kt with gusts up to 45 kt and 
  seas 9 to 14 feet at 11 seconds.

* WHERE...Coastal Waters from Point Reyes to Pigeon Point 
  California out to 10 nm.

* WHEN...Until 9 PM PDT this evening.

* IMPACTS...Strong winds will cause hazardous seas which could 
  capsize or damage vessels and reduce visibility.

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.

&&

$$

PZZ560-201800-
/O.CON.KMTR.GL.W.0025.000000T0000Z-210521T0400Z/
Coastal Waters from Pigeon Point to Point Pinos California out to
10 nm-
256 AM PDT Thu May 20 2021

...GALE WARNING REMAINS IN EFFECT UNTIL 9 PM PDT THIS EVENING...

* WHAT...Northwest winds 20 to 30 kt with gusts up to 45 kt and 
  seas 9 to 14 feet at 11 seconds.

* WHERE...Coastal Waters from Pigeon Point to Point Pinos 
  California out to 10 nm.

* WHEN...Until 9 PM PDT this evening.

* IMPACTS...Strong winds will cause hazardous seas which could 
  capsize or damage vessels and reduce visibility.

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.

&&

$$

PZZ565-201800-
/O.CON.KMTR.GL.W.0024.000000T0000Z-210521T0400Z/
Coastal Waters from Point Pinos to Point Piedras Blancas
California out to 10 nm-
256 AM PDT Thu May 20 2021

...GALE WARNING REMAINS IN EFFECT UNTIL 9 PM PDT THIS EVENING...

* WHAT...Northwest winds 20 to 30 kt with gusts up to 45 kt and 
  seas 8 to 13 feet at 11 seconds.

* WHERE...Coastal Waters from Point Pinos to Point Piedras 
  Blancas California out to 10 nm.

* WHEN...Until 9 PM PDT this evening.

* IMPACTS...Strong winds will cause hazardous seas which could 
  capsize or damage vessels and reduce visibility.

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.

&&

$$

For more information from the National Weather Service visit
http://weather.gov/sanfrancisco
2 follow-up statements
043 
WHUS76 KMTR 201551
MWWMTR

URGENT - MARINE WEATHER MESSAGE
National Weather Service San Francisco Bay Area
851 AM PDT Thu May 20 2021

PZZ570-210000-
/O.CON.KMTR.GL.W.0024.000000T0000Z-210521T2200Z/
Waters from Point Arena to Point Reyes 10-60 NM-
851 AM PDT Thu May 20 2021

...GALE WARNING REMAINS IN EFFECT UNTIL 3 PM PDT FRIDAY...

* WHAT...Northwest winds 25 to 30 kt with gusts up to 45 kt and 
  seas 9 to 12 feet at 11 seconds.

* WHERE...Waters from Point Arena to Point Reyes 10-60 NM.

* WHEN...Until 3 PM PDT Friday.

* IMPACTS...Strong winds will cause hazardous seas which could 
  capsize or damage vessels and reduce visibility.

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.

&&

$$

PZZ571-210000-
/O.CON.KMTR.GL.W.0024.000000T0000Z-210521T2200Z/
Waters from Point Reyes to Pigeon Point 10-60 NM-
851 AM PDT Thu May 20 2021

...GALE WARNING REMAINS IN EFFECT UNTIL 3 PM PDT FRIDAY...

* WHAT...Northwest winds 25 to 30 kt with gusts up to 45 kt and 
  seas 11 to 14 feet at 11 seconds.

* WHERE...Waters from Point Reyes to Pigeon Point 10-60 NM.

* WHEN...Until 3 PM PDT Friday.

* IMPACTS...Strong winds will cause hazardous seas which could 
  capsize or damage vessels and reduce visibility.

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.

&&

$$

PZZ575-210000-
/O.CON.KMTR.GL.W.0025.000000T0000Z-210521T1000Z/
Waters from Pigeon Point to Point Pinos 10-60 NM-
851 AM PDT Thu May 20 2021

...GALE WARNING REMAINS IN EFFECT UNTIL 3 AM PDT FRIDAY...

* WHAT...Northwest winds 25 to 30 kt with gusts up to 45 kt and 
  seas 11 to 14 feet at 11 seconds.

* WHERE...Waters from Pigeon Point to Point Pinos 10-60 NM.

* WHEN...Until 3 AM PDT Friday.

* IMPACTS...Strong winds will cause hazardous seas which could 
  capsize or damage vessels and reduce visibility.

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.

&&

$$

PZZ576-210000-
/O.CON.KMTR.GL.W.0024.000000T0000Z-210521T1000Z/
Waters from Point Pinos to Point Piedras Blancas 10-60 NM-
851 AM PDT Thu May 20 2021

...GALE WARNING REMAINS IN EFFECT UNTIL 3 AM PDT FRIDAY...

* WHAT...Northwest winds 25 to 30 kt with gusts up to 40 kt and 
  seas 12 to 14 feet at 11 seconds.

* WHERE...Waters from Point Pinos to Point Piedras Blancas 10- 
  60 NM.

* WHEN...Until 3 AM PDT Friday.

* IMPACTS...Strong winds will cause hazardous seas which could 
  capsize or damage vessels and reduce visibility.

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.

&&

$$

PZZ540-210000-
/O.CON.KMTR.GL.W.0024.000000T0000Z-210521T0400Z/
Coastal Waters from Point Arena to Point Reyes California out to
10 nm-
851 AM PDT Thu May 20 2021

...GALE WARNING REMAINS IN EFFECT UNTIL 9 PM PDT THIS EVENING...

* WHAT...Northwest winds 25 to 35 kt with gusts up to 45 kt and 
  seas 8 to 13 feet at 11 seconds.

* WHERE...Coastal Waters from Point Arena to Point Reyes 
  California out to 10 nm.

* WHEN...Until 9 PM PDT this evening.

* IMPACTS...Strong winds will cause hazardous seas which could 
  capsize or damage vessels and reduce visibility.

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.

&&

$$

PZZ545-210000-
/O.CON.KMTR.GL.W.0025.000000T0000Z-210521T0400Z/
Coastal Waters from Point Reyes to Pigeon Point California out to
10 nm-
851 AM PDT Thu May 20 2021

...GALE WARNING REMAINS IN EFFECT UNTIL 9 PM PDT THIS EVENING...

* WHAT...Northwest winds 25 to 35 kt with gusts up to 45 kt and 
  seas 9 to 14 feet at 11 seconds.

* WHERE...Coastal Waters from Point Reyes to Pigeon Point 
  California out to 10 nm.

* WHEN...Until 9 PM PDT this evening.

* IMPACTS...Strong winds will cause hazardous seas which could 
  capsize or damage vessels and reduce visibility.

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.

&&

$$

PZZ560-210000-
/O.CON.KMTR.GL.W.0025.000000T0000Z-210521T0400Z/
Coastal Waters from Pigeon Point to Point Pinos California out to
10 nm-
851 AM PDT Thu May 20 2021

...GALE WARNING REMAINS IN EFFECT UNTIL 9 PM PDT THIS EVENING...

* WHAT...Northwest winds 25 to 30 kt with gusts up to 45 kt and 
  seas 9 to 14 feet at 11 seconds.

* WHERE...Coastal Waters from Pigeon Point to Point Pinos 
  California out to 10 nm.

* WHEN...Until 9 PM PDT this evening.

* IMPACTS...Strong winds will cause hazardous seas which could 
  capsize or damage vessels and reduce visibility.

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.

&&

$$

PZZ565-210000-
/O.CON.KMTR.GL.W.0024.000000T0000Z-210521T0400Z/
Coastal Waters from Point Pinos to Point Piedras Blancas
California out to 10 nm-
851 AM PDT Thu May 20 2021

...GALE WARNING REMAINS IN EFFECT UNTIL 9 PM PDT THIS EVENING...

* WHAT...Northwest winds 25 to 30 kt with gusts up to 45 kt and 
  seas 8 to 13 feet at 11 seconds.

* WHERE...Coastal Waters from Point Pinos to Point Piedras 
  Blancas California out to 10 nm.

* WHEN...Until 9 PM PDT this evening.

* IMPACTS...Strong winds will cause hazardous seas which could 
  capsize or damage vessels and reduce visibility.

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.

&&

$$

PZZ530-202200-
/O.CON.KMTR.SC.Y.0105.000000T0000Z-210520T2200Z/
San Pablo Bay, Suisun Bay, the West Delta and  the San Francisco
Bay north of the Bay Bridge-
851 AM PDT Thu May 20 2021

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 PM PDT THIS
AFTERNOON...

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

* WHERE...San Pablo Bay, Suisun Bay, the West Delta and the San 
  Francisco Bay north of the Bay Bridge.

* WHEN...Until 3 PM PDT this afternoon.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

PZZ531-210000-
/O.CON.KMTR.SC.Y.0105.000000T0000Z-210521T0400Z/
San Francisco Bay South of the Bay Bridge-
851 AM PDT Thu May 20 2021

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 9 PM PDT THIS
EVENING...

* WHAT...Northwest winds 15 to 25 kt with gusts up to 35 kt.

* WHERE...San Francisco Bay South of the Bay Bridge.

* WHEN...Until 9 PM PDT 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.

&&

$$

PZZ535-210000-
/O.CON.KMTR.SC.Y.0105.000000T0000Z-210521T1000Z/
Monterey Bay-
851 AM PDT Thu May 20 2021

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 AM PDT FRIDAY...

* WHAT...Northwest winds 20 to 30 kt with gusts up to 40 kt and 
  seas 6 to 11 feet at 10 seconds.

* WHERE...Monterey Bay.

* WHEN...Until 3 AM PDT 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.

&&

$$

For more information from the National Weather Service visit
http://weather.gov/sanfrancisco
355 
WHUS76 KMTR 210002
MWWMTR

URGENT - MARINE WEATHER MESSAGE
National Weather Service San Francisco Bay Area
502 PM PDT Thu May 20 2021

PZZ535-210815-
/O.UPG.KMTR.SC.Y.0105.000000T0000Z-210521T1000Z/
/O.EXA.KMTR.GL.W.0024.000000T0000Z-210521T0400Z/
Monterey Bay-
502 PM PDT Thu May 20 2021

...GALE WARNING IN EFFECT UNTIL 9 PM PDT THIS EVENING...

* WHAT...Northwest winds 20 to 30 kt with gusts up to 40 kt and 
  seas 6 to 11 feet at 10 seconds.

* WHERE...Monterey Bay.

* WHEN...Until 9 PM PDT this evening.

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

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.

&&

$$

PZZ531-210400-
/O.UPG.KMTR.SC.Y.0105.000000T0000Z-210521T0400Z/
/O.EXA.KMTR.GL.W.0024.000000T0000Z-210521T0400Z/
San Francisco Bay South of the Bay Bridge-
502 PM PDT Thu May 20 2021

...GALE WARNING IN EFFECT UNTIL 9 PM PDT THIS EVENING...

* WHAT...Northwest winds 15 to 25 kt with gusts up to 35 kt.

* WHERE...San Francisco Bay South of the Bay Bridge.

* WHEN...Until 9 PM PDT this evening.

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

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.

&&

$$

PZZ570-210815-
/O.EXT.KMTR.GL.W.0024.000000T0000Z-210522T0400Z/
Waters from Point Arena to Point Reyes 10-60 NM-
502 PM PDT Thu May 20 2021

...GALE WARNING NOW IN EFFECT UNTIL 9 PM PDT FRIDAY...

* WHAT...Northwest winds 25 to 30 kt with gusts up to 45 kt and 
  seas 9 to 12 feet at 11 seconds.

* WHERE...Waters from Point Arena to Point Reyes 10-60 NM.

* WHEN...Until 9 PM PDT Friday.

* IMPACTS...Strong winds will cause hazardous seas which could 
  capsize or damage vessels and reduce visibility.

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.

&&

$$

PZZ571-210815-
/O.EXT.KMTR.GL.W.0024.000000T0000Z-210522T0400Z/
Waters from Point Reyes to Pigeon Point 10-60 NM-
502 PM PDT Thu May 20 2021

...GALE WARNING NOW IN EFFECT UNTIL 9 PM PDT FRIDAY...

* WHAT...Northwest winds 25 to 30 kt with gusts up to 45 kt and 
  seas 11 to 14 feet at 11 seconds.

* WHERE...Waters from Point Reyes to Pigeon Point 10-60 NM.

* WHEN...Until 9 PM PDT Friday.

* IMPACTS...Strong winds will cause hazardous seas which could 
  capsize or damage vessels and reduce visibility.

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.

&&

$$

PZZ575-210815-
/O.CON.KMTR.GL.W.0025.000000T0000Z-210521T1000Z/
Waters from Pigeon Point to Point Pinos 10-60 NM-
502 PM PDT Thu May 20 2021

...GALE WARNING REMAINS IN EFFECT UNTIL 3 AM PDT FRIDAY...

* WHAT...Northwest winds 25 to 30 kt with gusts up to 45 kt and 
  seas 11 to 14 feet at 11 seconds.

* WHERE...Waters from Pigeon Point to Point Pinos 10-60 NM.

* WHEN...Until 3 AM PDT Friday.

* IMPACTS...Strong winds will cause hazardous seas which could 
  capsize or damage vessels and reduce visibility.

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.

&&

$$

PZZ576-210815-
/O.CON.KMTR.GL.W.0024.000000T0000Z-210521T1000Z/
Waters from Point Pinos to Point Piedras Blancas 10-60 NM-
502 PM PDT Thu May 20 2021

...GALE WARNING REMAINS IN EFFECT UNTIL 3 AM PDT FRIDAY...

* WHAT...Northwest winds 25 to 30 kt with gusts up to 40 kt and 
  seas 12 to 14 feet at 11 seconds.

* WHERE...Waters from Point Pinos to Point Piedras Blancas 10- 
  60 NM.

* WHEN...Until 3 AM PDT Friday.

* IMPACTS...Strong winds will cause hazardous seas which could 
  capsize or damage vessels and reduce visibility.

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.

&&

$$

PZZ540-210400-
/O.CON.KMTR.GL.W.0024.000000T0000Z-210521T0400Z/
Coastal Waters from Point Arena to Point Reyes California out to
10 nm-
502 PM PDT Thu May 20 2021

...GALE WARNING REMAINS IN EFFECT UNTIL 9 PM PDT THIS EVENING...

* WHAT...Northwest winds 25 to 35 kt with gusts up to 45 kt and 
  seas 8 to 13 feet at 11 seconds.

* WHERE...Coastal Waters from Point Arena to Point Reyes 
  California out to 10 nm.

* WHEN...Until 9 PM PDT this evening.

* IMPACTS...Strong winds will cause hazardous seas which could 
  capsize or damage vessels and reduce visibility.

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.

&&

$$

PZZ545-210400-
/O.CON.KMTR.GL.W.0025.000000T0000Z-210521T0400Z/
Coastal Waters from Point Reyes to Pigeon Point California out to
10 nm-
502 PM PDT Thu May 20 2021

...GALE WARNING REMAINS IN EFFECT UNTIL 9 PM PDT THIS EVENING...

* WHAT...Northwest winds 25 to 35 kt with gusts up to 45 kt and 
  seas 9 to 14 feet at 11 seconds.

* WHERE...Coastal Waters from Point Reyes to Pigeon Point 
  California out to 10 nm.

* WHEN...Until 9 PM PDT this evening.

* IMPACTS...Strong winds will cause hazardous seas which could 
  capsize or damage vessels and reduce visibility.

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.

&&

$$

PZZ560-210400-
/O.CON.KMTR.GL.W.0025.000000T0000Z-210521T0400Z/
Coastal Waters from Pigeon Point to Point Pinos California out to
10 nm-
502 PM PDT Thu May 20 2021

...GALE WARNING REMAINS IN EFFECT UNTIL 9 PM PDT THIS EVENING...

* WHAT...Northwest winds 25 to 30 kt with gusts up to 45 kt and 
  seas 9 to 14 feet at 11 seconds.

* WHERE...Coastal Waters from Pigeon Point to Point Pinos 
  California out to 10 nm.

* WHEN...Until 9 PM PDT this evening.

* IMPACTS...Strong winds will cause hazardous seas which could 
  capsize or damage vessels and reduce visibility.

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.

&&

$$

PZZ565-210400-
/O.CON.KMTR.GL.W.0024.000000T0000Z-210521T0400Z/
Coastal Waters from Point Pinos to Point Piedras Blancas
California out to 10 nm-
502 PM PDT Thu May 20 2021

...GALE WARNING REMAINS IN EFFECT UNTIL 9 PM PDT THIS EVENING...

* WHAT...Northwest winds 25 to 30 kt with gusts up to 45 kt and 
  seas 8 to 13 feet at 11 seconds.

* WHERE...Coastal Waters from Point Pinos to Point Piedras 
  Blancas California out to 10 nm.

* WHEN...Until 9 PM PDT this evening.

* IMPACTS...Strong winds will cause hazardous seas which could 
  capsize or damage vessels and reduce visibility.

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.

&&

$$

PZZ530-210400-
/O.NEW.KMTR.SC.Y.0106.210521T0002Z-210521T0400Z/
San Pablo Bay, Suisun Bay, the West Delta and  the San Francisco
Bay north of the Bay Bridge-
502 PM PDT Thu May 20 2021

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 9 PM PDT THIS EVENING...

* WHAT...Northwest winds 15 to 25 kt with gusts up to 30 kt.

* WHERE...San Pablo Bay, Suisun Bay, the West Delta and the San 
  Francisco Bay north of the Bay Bridge.

* WHEN...Until 9 PM PDT 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.

&&

$$

For more information from the National Weather Service visit
http://weather.gov/sanfrancisco

What forecasters said that day

The local office's own words before this small craft advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS San Francisco Bay Area, CA wrote its last area forecast discussion before this small craft advisory went out at May 19, 11:23 PM PDT, 3 hours 33 minutes earlier.

Area forecast discussion, May 19, 11:23 PM PDT, 3 hours 33 minutes before
Area Forecast Discussion
National Weather Service San Francisco Bay Area
1123 PM PDT Wed May 19 2021

.SYNOPSIS...Breezy and gusty northwest winds will continue through
Thursday along with well below normal temperatures. A gradual
warming trend is forecast from Friday through early next week.

&&

.DISCUSSION...as of 8:59 PM PDT Wednesday...Wind advisory is in
effect for much of the region and not seeing any reason to drop
headlines. We've got blustery conditions across the Bay Area with
gusts in excess of 50 mph along the coast, Marin Hills, SFO and
out over the Altamont. Wind advisory will remain in effect through
5 am. Synoptic pattern features a well defined upper trough
currently over Oregon and dropping towards Mt Shasta overnight.
The main feature with this trough is very cold air aloft for the
second half of May. In addition at this time the SFO to Sacramento
gradient peaked above 5 mb this afternoon during peak heating
allowing for the strong onshore winds. Over the ocean the strong
winds have induced some coastal upwelling with sea surface temps
(SST) back down to a chilly 50-52 degrees. So those strong winds
feel especially cold this evening with temps in the 50s and a cold
airmass aloft.

Tomorrow morning a few furnaces may want to kick on as morning
lows will be especially chilly in the 40s with brisk onshore winds
and a fairly dry airmass. 850 mb temps will drop to as low as 2-4
celsius during the day as the main upper low drops across interior
Norcal. If you have plans to hike some of the higher hills/peaks
across the Bay Area Thursday or Friday afternoon there will be a
distinct chill to the air. Note we aren't talking about any
marine inversion layer as the cold airmass with this system has of
course scoured out the marine layer and associated low clouds.
Most of the precip with the upper low will be focused over the
Sierra. Be advised that Winter Weather Advisory is in effect with
snow levels down to lake level and possible impacts over the
trans-Sierra highways and for those with outdoor plans in the high
country. Check WFO Sacramento and Reno for the latest forecast
details and plan accordingly.

Similar to the upper low a few days ago, the models do indicate
some showers developing over Lake County on Thursday afternoon.
There is a slight chance they could drift into extreme northern
Sonoma or Napa county but that looks unlikely with any cells
falling apart as they would enter towards nightfall Thursday
evening. Daytime highs for Thursday will be cool regionwide with
highs mainly in the 60s though winds will ease through the day and
shouldn't be as strong as what we are seeing this evening.

The upper low will stay just to our east Friday into Saturday,
keeping any precip chances over the Sierra. The cold air
associated with the upper low will keep temps a few degrees below
normal Friday with a slight warming trend back closer to normal by
Saturday as the low starts to eject. In terms of weekend planning
the weather looks pretty uneventful with mostly sunny skies and
near normal temps for most of the region and no hot weather
inland.

Zonal flow early next week with a midweek shortwave staying to our
north. Not expecting any rain but no signs of any hot weather
headed our way either which may be some good news as we look for
ways to delay fire season. On that note will say the updated fuel
dryness charts have dropped back closer to normal with the recent
round of marine layer, higher RH, local drizzle and cooler temps
helping to mitigate some of the fuel dryness in the finer fuels.

&&

.PREV DISCUSSION...as of 01:01 PM PDT Wednesday...Mostly sunny sky
conditions prevail across the entire region this afternoon with
temperatures generally a few to as much as 10 degrees cooler
compared to 24 hours ago. This is due to the dry frontal boundary
that swept through the region allowing for cooler, drier air to
advect across the region. Additionally, the surface pressure
gradient continues to tighten resulting in breezy to gusty winds.
These winds are likely to strengthen along the coast and in the
hills, ridges and peaks through tonight with gusts likely in
excess of 45 mph at times. Thus, the Wind Advisory remains in
effect for many of the aforementioned areas. Please see NPWMTR for
complete details on the advisory.

Look for breezy conditions to extended into Thursday as well with
the potential for the Wind Advisory to be extended, yet will allow
the evening/overnight shifts to monitor short-range forecast
guidance trends. Overall weather conditions on Thursday will be
similar to today as the mid/upper level trough digs southward into
northern and interior California. These breezy winds and drier
conditions will bring elevated fire concerns, however with the
absent of stronger offshore winds and/or critically low relative
humidity the threat for widespread critical fire weather conditions
appears minimal at this time.

Winds are forecast do diminish late in the week as high pressure
builds over the eastern Pacific. This should also result in a subtle
warming trend on Friday and into the upcoming weekend. Look for
widespread upper 70s to lower 80s to return by early next week.

&&

.AVIATION...As of 11:15 PM PDT Wednesday...For the 06z TAFs. Gusty
northwesterly to westerly winds continue tonight around
KSFO/KSTS/KLVK. These winds will be slow to diminish tonight.
Elsewhere, winds will remain AOB 14kts through 15Z. LLWS will set
up for most terminals as a 35-40kt jet at 2000ft remains in tact
tonight. Skies will be mostly SKC- FEW020 with drier air in
place. Stronger westerly to northwesterly winds return tomorrow.
Winds peaking from 20Z through 04Z for most terminals. Gusts for
inland areas should see 25-30kts, and 30-35kts for coastal
terminals. Winds will be slow to calm down Thursday evening.

Vicinity of KSFO...Northwest winds will continue with strong gusts
until around 10Z tonight. Winds will slowly drop to below AWW
criteria, but could still see some isolated gusts up to 40 kts for
the next couple hours. With a stronger jet of 45kts at 2000ft
lasting through the night, LLWS could form if winds drop below
25kts, which they could from 11Z to 14Z. Skies will reamin FEW-
SCT at 015-020 through mid morning, then FEW250. Winds will pick
up quickly again tomorrow. Similar strength to the winds, maybe a
few kts weaker. Will put out an AWW for tomorrow.

SFO Bridge Approach...Similar to KSFO.

Monterey Bay Terminals...VRF. Light westerly winds tonight with
skies remaining around FEW-SCT at 015-020. MVFR cigs will be
spotty at KMRY as air remains fairly dry.

&&

.MARINE...as of 08:28 PM PDT Wednesday...Strong, gusty northwest
winds across the waters today and through the coming days. These
northwest winds will peak through the afternoon and this evening,
with infrequent to occasional storm  force gusts are possible
along the coast, and frequent higher end gale force gusts expected
across the entire waters through at  least late tomorrow. These
strong winds will generate very steep  fresh seas of up 12 to 17
feet at 8 to 10 seconds that are  hazardous, particularly for
small craft vessels which may struggle against the strong winds
and rough seas. Mixed seas will continue with a northwest swell
and a longer period southerly swell.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .Tday...Wind Advisory...CAZ006-505>509-511-512-517-518
             GLW...Pt Arena to Pt Reyes 0-10 nm
             GLW...Pt Reyes to Pigeon Pt 0-10 nm
             GLW...Pigeon Pt to Pt Pinos 0-10 nm
             GLW...Pt Pinos to Pt Piedras Blancas 0-10 nm
             GLW...Pt Arena to Pigeon Pt 10-60 nm
             GLW...Pigeon Pt to Pt Piedras Blancas 10-60 nm
             GLW...SF Bay until 3 AM
             GLW...Mry Bay until 3 AM

&&

PUBLIC FORECAST: RWW
AVIATION: Dhuyvetter
MARINE: Canepa

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The office that day

Everything else NWS San Francisco Bay Area, CA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 20, 11:10 AM PDTWind AdvisoryMTRMarin, Monterey, City and County of San Francisco, San Mateo, Santa Cruz, Sonoma10 hr

Nearby

Small Craft Advisories in California, 2021Every small craft advisory 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.