Alert archive / California / Gale Warnings in 2020

Gale Warning 11, NWS San Francisco Bay Area, CA

April 20, 2020

NWS San Francisco Bay Area, CA issued this gale warning at Apr 20, 2020, 9:43 PM PDT. It took effect at Apr 21, 2020, 9:00 AM PDT. It was in force for 6 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 20, 2020, 9:43 PM PDT (04:43 UTC)
In effect from
Apr 21, 2020, 9:00 AM PDT
Expired
Apr 21, 2020, 2:37 PM PDT
In force
6 hr
Issued by
NWS San Francisco Bay Area, CA

The text

As transmitted.

292 
WHUS76 KMTR 210443
MWWMTR

URGENT - MARINE WEATHER MESSAGE
National Weather Service San Francisco Bay Area
943 PM PDT Mon Apr 20 2020

PZZ565-211245-
/O.CON.KMTR.SC.Y.0061.000000T0000Z-200421T1600Z/
/O.UPG.KMTR.GL.A.0004.200421T1600Z-200422T1000Z/
/O.NEW.KMTR.GL.W.0011.200421T1600Z-200423T0100Z/
Coastal Waters from Point Pinos to Point Piedras Blancas
California out to 10 nm-
943 PM PDT Mon Apr 20 2020

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 9 AM PDT
TUESDAY...
...GALE WARNING IN EFFECT FROM 9 AM TUESDAY TO 6 PM PDT
WEDNESDAY...

* WHAT...For the Gale Warning, northwest winds 15 to 25 kt with 
  gusts up to 35 kt and seas 7 to 12 feet at 16 seconds 
  expected. For the Small Craft Advisory, northwest winds 15 to 
  25 kt with gusts up to 30 kt and seas 8 to 10 feet at 17 
  seconds.

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

* WHEN...For the Gale Warning, from 9 AM Tuesday to 6 PM PDT 
  Wednesday. For the Small Craft Advisory, until 9 AM PDT 
  Tuesday.

* 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.

&&

$$

PZZ570-211245-
/O.EXT.KMTR.SC.Y.0061.000000T0000Z-200422T1400Z/
Waters from Point Arena to Point Reyes 10-60 NM-
943 PM PDT Mon Apr 20 2020

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 7 AM PDT WEDNESDAY...

* WHAT...Northwest winds 15 to 20 kt with gusts up to 30 kt and 
  seas 9 to 11 feet at 17 seconds expected.

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

* WHEN...Until 7 AM PDT Wednesday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

PZZ571-211245-
/O.EXT.KMTR.SC.Y.0061.000000T0000Z-200423T0100Z/
Waters from Point Reyes to Pigeon Point 10-60 NM-
943 PM PDT Mon Apr 20 2020

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 6 PM PDT WEDNESDAY...

* WHAT...Northwest winds 15 to 25 kt with gusts up to 30 kt and 
  seas 8 to 11 feet at 18 seconds expected.

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

* WHEN...Until 6 PM PDT Wednesday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

PZZ575-211245-
/O.EXT.KMTR.SC.Y.0061.200421T0600Z-200423T0100Z/
Waters from Pigeon Point to Point Pinos 10-60 NM-
943 PM PDT Mon Apr 20 2020

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 6 PM PDT WEDNESDAY...

* WHAT...Northwest winds around 20 kt with gusts up to 30 kt and 
  seas 10 to 11 feet at 17 seconds expected.

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

* WHEN...Until 6 PM PDT Wednesday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

PZZ576-211245-
/O.EXT.KMTR.SC.Y.0061.000000T0000Z-200423T0100Z/
Waters from Point Pinos to Point Piedras Blancas 10-60 NM-
943 PM PDT Mon Apr 20 2020

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 6 PM PDT WEDNESDAY...

* WHAT...Northwest winds 15 to 25 kt with gusts up to 30 kt and 
  seas 8 to 12 feet at 18 seconds expected.

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

* WHEN...Until 6 PM PDT Wednesday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

PZZ540-211245-
/O.EXT.KMTR.SC.Y.0061.000000T0000Z-200423T0100Z/
Coastal Waters from Point Arena to Point Reyes California out to
10 nm-
943 PM PDT Mon Apr 20 2020

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 6 PM PDT WEDNESDAY...

* WHAT...Northwest winds 15 to 25 kt with gusts up to 35 kt and 
  seas 7 to 11 feet at 17 seconds expected.

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

* WHEN...Until 6 PM PDT Wednesday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

PZZ545-211245-
/O.EXT.KMTR.SC.Y.0061.000000T0000Z-200423T0100Z/
Coastal Waters from Point Reyes to Pigeon Point California out to
10 nm-
943 PM PDT Mon Apr 20 2020

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 6 PM PDT WEDNESDAY...

* WHAT...Northwest winds 15 to 25 kt with gusts up to 30 kt and 
  seas 6 to 11 feet at 18 seconds expected.

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

* WHEN...Until 6 PM PDT Wednesday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

PZZ560-211245-
/O.EXT.KMTR.SC.Y.0061.000000T0000Z-200423T0100Z/
Coastal Waters from Pigeon Point to Point Pinos California out to
10 nm-
943 PM PDT Mon Apr 20 2020

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 6 PM PDT WEDNESDAY...

* WHAT...Northwest winds 15 to 25 kt with gusts up to 30 kt and 
  seas 6 to 11 feet at 18 seconds expected.

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

* WHEN...Until 6 PM PDT Wednesday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

PZZ535-211245-
/O.EXT.KMTR.SC.Y.0062.200421T1600Z-200423T0100Z/
Monterey Bay-
943 PM PDT Mon Apr 20 2020

...SMALL CRAFT ADVISORY NOW IN EFFECT FROM 9 AM TUESDAY TO 6 PM
PDT WEDNESDAY...

* WHAT...For the first Small Craft Advisory, west winds 15 to 25 
  kt with gusts up to 30 kt expected. For the second Small Craft 
  Advisory, northwest winds 15 to 25 kt with gusts up to 35 kt 
  expected.

* WHERE...Monterey Bay.

* WHEN...From 9 AM Tuesday to 6 PM PDT Wednesday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

PZZ531-211245-
/O.CON.KMTR.SC.Y.0062.200421T2200Z-200422T0400Z/
San Francisco Bay South of the Bay Bridge-
943 PM PDT Mon Apr 20 2020

...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 3 PM TO 9 PM PDT
TUESDAY...

* WHAT...Choppy waters expected.

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

* WHEN...From 3 PM to 9 PM PDT Tuesday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$
3 follow-up statements
121 
WHUS76 KMTR 210907
MWWMTR

URGENT - MARINE WEATHER MESSAGE
National Weather Service San Francisco Bay Area
207 AM PDT Tue Apr 21 2020

PZZ565-211715-
/O.CON.KMTR.SC.Y.0061.000000T0000Z-200421T1600Z/
/O.CON.KMTR.GL.W.0011.200421T1600Z-200423T0100Z/
Coastal Waters from Point Pinos to Point Piedras Blancas
California out to 10 nm-
207 AM PDT Tue Apr 21 2020

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 9 AM PDT THIS
MORNING...
...GALE WARNING REMAINS IN EFFECT FROM 9 AM THIS MORNING TO 6 PM
PDT WEDNESDAY...

* WHAT...For the Gale Warning, northwest winds 15 to 25 kt with 
  gusts up to 35 kt and seas 7 to 12 feet at 16 seconds 
  expected. For the Small Craft Advisory, northwest winds 15 to 
  25 kt with gusts up to 30 kt and seas 8 to 10 feet at 17 
  seconds.

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

* WHEN...For the Gale Warning, from 9 AM Tuesday to 6 PM PDT 
  Wednesday. For the Small Craft Advisory, until 9 AM PDT 
  Tuesday.

* 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.

&&

$$

PZZ570-211715-
/O.CON.KMTR.SC.Y.0061.000000T0000Z-200422T1400Z/
Waters from Point Arena to Point Reyes 10-60 NM-
207 AM PDT Tue Apr 21 2020

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 AM PDT
WEDNESDAY...

* WHAT...Northwest winds 15 to 20 kt with gusts up to 30 kt and 
  seas 9 to 11 feet at 17 seconds expected.

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

* WHEN...Until 7 AM PDT Wednesday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

PZZ571-211715-
/O.CON.KMTR.SC.Y.0061.000000T0000Z-200423T0100Z/
Waters from Point Reyes to Pigeon Point 10-60 NM-
207 AM PDT Tue Apr 21 2020

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 PM PDT
WEDNESDAY...

* WHAT...Northwest winds 15 to 25 kt with gusts up to 30 kt and 
  seas 8 to 11 feet at 18 seconds expected.

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

* WHEN...Until 6 PM PDT Wednesday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

PZZ575-211715-
/O.CON.KMTR.SC.Y.0061.000000T0000Z-200423T0100Z/
Waters from Pigeon Point to Point Pinos 10-60 NM-
207 AM PDT Tue Apr 21 2020

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 PM PDT
WEDNESDAY...

* WHAT...Northwest winds around 20 kt with gusts up to 30 kt and 
  seas 10 to 11 feet at 17 seconds expected.

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

* WHEN...Until 6 PM PDT Wednesday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

PZZ576-211715-
/O.CON.KMTR.SC.Y.0061.000000T0000Z-200423T0100Z/
Waters from Point Pinos to Point Piedras Blancas 10-60 NM-
207 AM PDT Tue Apr 21 2020

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 PM PDT
WEDNESDAY...

* WHAT...Northwest winds 15 to 25 kt with gusts up to 30 kt and 
  seas 8 to 12 feet at 18 seconds expected.

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

* WHEN...Until 6 PM PDT Wednesday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

PZZ540-211715-
/O.CON.KMTR.SC.Y.0061.000000T0000Z-200423T0100Z/
Coastal Waters from Point Arena to Point Reyes California out to
10 nm-
207 AM PDT Tue Apr 21 2020

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 PM PDT
WEDNESDAY...

* WHAT...Northwest winds 15 to 25 kt with gusts up to 35 kt and 
  seas 7 to 11 feet at 17 seconds expected.

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

* WHEN...Until 6 PM PDT Wednesday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

PZZ545-211715-
/O.CON.KMTR.SC.Y.0061.000000T0000Z-200423T0100Z/
Coastal Waters from Point Reyes to Pigeon Point California out to
10 nm-
207 AM PDT Tue Apr 21 2020

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 PM PDT
WEDNESDAY...

* WHAT...Northwest winds 15 to 25 kt with gusts up to 30 kt and 
  seas 6 to 11 feet at 18 seconds expected.

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

* WHEN...Until 6 PM PDT Wednesday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

PZZ560-211715-
/O.CON.KMTR.SC.Y.0061.000000T0000Z-200423T0100Z/
Coastal Waters from Pigeon Point to Point Pinos California out to
10 nm-
207 AM PDT Tue Apr 21 2020

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 PM PDT
WEDNESDAY...

* WHAT...Northwest winds 15 to 25 kt with gusts up to 30 kt and 
  seas 6 to 11 feet at 18 seconds expected.

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

* WHEN...Until 6 PM PDT Wednesday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

PZZ535-211715-
/O.CON.KMTR.SC.Y.0062.200421T1600Z-200423T0100Z/
Monterey Bay-
207 AM PDT Tue Apr 21 2020

...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 9 AM THIS MORNING
TO 6 PM PDT WEDNESDAY...

* WHAT...For the first Small Craft Advisory, west winds 15 to 25 
  kt with gusts up to 30 kt expected. For the second Small Craft 
  Advisory, northwest winds 15 to 25 kt with gusts up to 35 kt 
  expected.

* WHERE...Monterey Bay.

* WHEN...From 9 AM Tuesday to 6 PM PDT Wednesday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

PZZ531-211715-
/O.CON.KMTR.SC.Y.0062.200421T2200Z-200422T0400Z/
San Francisco Bay South of the Bay Bridge-
207 AM PDT Tue Apr 21 2020

...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 3 PM THIS
AFTERNOON TO 9 PM PDT THIS EVENING...

* WHAT...Choppy waters expected.

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

* WHEN...From 3 PM to 9 PM PDT Tuesday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$
315 
WHUS76 KMTR 211543
MWWMTR

URGENT - MARINE WEATHER MESSAGE
National Weather Service San Francisco Bay Area
843 AM PDT Tue Apr 21 2020

PZZ565-212345-
/O.EXP.KMTR.SC.Y.0061.000000T0000Z-200421T1600Z/
/O.CON.KMTR.GL.W.0011.200421T1600Z-200423T0100Z/
Coastal Waters from Point Pinos to Point Piedras Blancas
California out to 10 nm-
843 AM PDT Tue Apr 21 2020

...GALE WARNING REMAINS IN EFFECT UNTIL 6 PM PDT WEDNESDAY...
...SMALL CRAFT ADVISORY WILL EXPIRE AT 9 AM PDT THIS MORNING...

* WHAT...Northwest winds 20 to 30 kt with gusts up to 40 kt 
  expected.

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

* WHEN...Until 6 PM PDT Wednesday.

* 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.

&&

$$

PZZ570-212345-
/O.CON.KMTR.SC.Y.0061.000000T0000Z-200422T1400Z/
Waters from Point Arena to Point Reyes 10-60 NM-
843 AM PDT Tue Apr 21 2020

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 AM PDT
WEDNESDAY...

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

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

* WHEN...Until 7 AM PDT Wednesday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

PZZ571-212345-
/O.CON.KMTR.SC.Y.0061.000000T0000Z-200423T0100Z/
Waters from Point Reyes to Pigeon Point 10-60 NM-
843 AM PDT Tue Apr 21 2020

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 PM PDT
WEDNESDAY...

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

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

* WHEN...Until 6 PM PDT Wednesday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

PZZ575-212345-
/O.CON.KMTR.SC.Y.0061.000000T0000Z-200423T0100Z/
Waters from Pigeon Point to Point Pinos 10-60 NM-
843 AM PDT Tue Apr 21 2020

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 PM PDT
WEDNESDAY...

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

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

* WHEN...Until 6 PM PDT Wednesday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

PZZ576-212345-
/O.CON.KMTR.SC.Y.0061.000000T0000Z-200423T0100Z/
Waters from Point Pinos to Point Piedras Blancas 10-60 NM-
843 AM PDT Tue Apr 21 2020

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 PM PDT
WEDNESDAY...

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

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

* WHEN...Until 6 PM PDT Wednesday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

PZZ540-212345-
/O.CON.KMTR.SC.Y.0061.000000T0000Z-200423T0100Z/
Coastal Waters from Point Arena to Point Reyes California out to
10 nm-
843 AM PDT Tue Apr 21 2020

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 PM PDT
WEDNESDAY...

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

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

* WHEN...Until 6 PM PDT Wednesday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

PZZ545-212345-
/O.CON.KMTR.SC.Y.0061.000000T0000Z-200423T0100Z/
Coastal Waters from Point Reyes to Pigeon Point California out to
10 nm-
843 AM PDT Tue Apr 21 2020

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 PM PDT
WEDNESDAY...

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

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

* WHEN...Until 6 PM PDT Wednesday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

PZZ560-212345-
/O.CON.KMTR.SC.Y.0061.000000T0000Z-200423T0100Z/
Coastal Waters from Pigeon Point to Point Pinos California out to
10 nm-
843 AM PDT Tue Apr 21 2020

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 PM PDT
WEDNESDAY...

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

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

* WHEN...Until 6 PM PDT Wednesday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

PZZ535-212345-
/O.CON.KMTR.SC.Y.0062.200421T1600Z-200423T0100Z/
Monterey Bay-
843 AM PDT Tue Apr 21 2020

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 PM PDT
WEDNESDAY...

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

* WHERE...Monterey Bay.

* WHEN...Until 6 PM PDT Wednesday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

PZZ531-212345-
/O.CON.KMTR.SC.Y.0062.200421T2200Z-200422T0400Z/
San Francisco Bay South of the Bay Bridge-
843 AM PDT Tue Apr 21 2020

...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 3 PM THIS
AFTERNOON TO 9 PM PDT THIS EVENING...

* WHAT...West winds 10 to 20 kt with gusts up to 30 kt and 
  choppy waters expected.

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

* WHEN...From 3 PM this afternoon to 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.

&&

$$
141 
WHUS76 KMTR 212137
MWWMTR

URGENT - MARINE WEATHER MESSAGE
National Weather Service San Francisco Bay Area
237 PM PDT Tue Apr 21 2020

PZZ565-220545-
/O.CAN.KMTR.GL.W.0011.000000T0000Z-200423T0100Z/
/O.EXB.KMTR.SC.Y.0061.000000T0000Z-200423T1600Z/
Coastal Waters from Point Pinos to Point Piedras Blancas
California out to 10 nm-
237 PM PDT Tue Apr 21 2020

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 9 AM PDT THURSDAY...
...GALE WARNING IS CANCELLED...

* WHAT...Northwest winds 15 to 25 kt with gusts of 30 kt. Local
  and occasional gusts of 35 to 40 kt are possible.

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

* WHEN...Until 9 AM PDT 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.

&&

$$

PZZ535-220545-
/O.EXT.KMTR.SC.Y.0062.000000T0000Z-200422T0400Z/
/O.NEW.KMTR.SC.Y.0063.200422T2000Z-200423T0400Z/
Monterey Bay-
237 PM PDT Tue Apr 21 2020

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 9 PM PDT THIS
EVENING...
...SMALL CRAFT ADVISORY IN EFFECT FROM 1 PM TO 9 PM PDT
WEDNESDAY...

* WHAT...For the first Small Craft Advisory, northwest winds 15 
  to 25 kt with gusts up to 35 kt. For the second Small Craft 
  Advisory, northwest winds 15 to 25 kt with gusts up to 30 kt 
  expected.

* WHERE...Monterey Bay.

* WHEN...For the Small Craft Advisory, until 9 PM PDT this 
  evening. For the Small Craft Advisory, from 1 PM to 9 PM PDT 
  Wednesday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

PZZ571-220545-
/O.EXT.KMTR.SC.Y.0061.000000T0000Z-200423T0400Z/
Waters from Point Reyes to Pigeon Point 10-60 NM-
237 PM PDT Tue Apr 21 2020

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 9 PM PDT WEDNESDAY...

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

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

* WHEN...Until 9 PM PDT Wednesday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

PZZ575-220545-
/O.EXT.KMTR.SC.Y.0061.000000T0000Z-200423T0400Z/
Waters from Pigeon Point to Point Pinos 10-60 NM-
237 PM PDT Tue Apr 21 2020

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 9 PM PDT WEDNESDAY...

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

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

* WHEN...Until 9 PM PDT Wednesday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

PZZ576-220545-
/O.EXT.KMTR.SC.Y.0061.000000T0000Z-200423T1600Z/
Waters from Point Pinos to Point Piedras Blancas 10-60 NM-
237 PM PDT Tue Apr 21 2020

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 9 AM PDT THURSDAY...

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

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

* WHEN...Until 9 AM PDT 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.

&&

$$

PZZ540-220545-
/O.EXT.KMTR.SC.Y.0061.000000T0000Z-200423T0400Z/
Coastal Waters from Point Arena to Point Reyes California out to
10 nm-
237 PM PDT Tue Apr 21 2020

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 9 PM PDT WEDNESDAY...

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

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

* WHEN...Until 9 PM PDT Wednesday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

PZZ545-220545-
/O.EXT.KMTR.SC.Y.0061.000000T0000Z-200423T0400Z/
Coastal Waters from Point Reyes to Pigeon Point California out to
10 nm-
237 PM PDT Tue Apr 21 2020

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 9 PM PDT WEDNESDAY...

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

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

* WHEN...Until 9 PM PDT Wednesday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

PZZ560-220545-
/O.EXT.KMTR.SC.Y.0061.000000T0000Z-200423T0400Z/
Coastal Waters from Pigeon Point to Point Pinos California out to
10 nm-
237 PM PDT Tue Apr 21 2020

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 9 PM PDT WEDNESDAY...

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

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

* WHEN...Until 9 PM PDT Wednesday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

PZZ570-220545-
/O.CON.KMTR.SC.Y.0061.000000T0000Z-200422T1400Z/
Waters from Point Arena to Point Reyes 10-60 NM-
237 PM PDT Tue Apr 21 2020

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 AM PDT
WEDNESDAY...

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

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

* WHEN...Until 7 AM PDT Wednesday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

PZZ531-220400-
/O.CON.KMTR.SC.Y.0062.200421T2200Z-200422T0400Z/
San Francisco Bay South of the Bay Bridge-
237 PM PDT Tue Apr 21 2020

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

* WHAT...Choppy waters 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.

&&

$$

What forecasters said that day

The local office's own words before this gale warning 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 gale warning went out at Apr 20, 9:10 PM PDT, 33 minutes earlier.

Area forecast discussion, Apr 20, 9:10 PM PDT, 33 minutes before
Area Forecast Discussion
National Weather Service San Francisco Bay Area
910 PM PDT Mon Apr 20 2020

.SYNOPSIS...Continued cloudy and seasonably cool overnight as one
last weak upper trough exits the region. High pressure begins to
build Tuesday with a gradual warming trend through the end of the
work week and into the weekend. Above average temperatures are
then forecast through the end of the month with dry conditions.

&&

.DISCUSSION...as of 9:10 PM PDT Monday...Some rogue showers
continued through sunset, mainly across Sonoma county and the far
East Bay. Throughout the day there were some very light and
scattered showers, most numerous for the Central Coast where a
trace to a few hunredths was recorded at several sites. This was
all due to a weak 500 mb trough passing through the region.
Evening satellite shows plenty of clouds across the region with
most terminals reporting cloud heights between 2000-4000 feet. The
cloud cover will keep overnight lows in the 40s most locations
with lower 50s near the coast/bays.

High pressure begins to build on Tuesday with inland areas warming
back into the 70s. Coastal areas will be under the influence of
brisk onshore flow with potential for low clouds to linger for
much of the day in favored locations like Half Moon Bay and
Monterey.

High pressure to build midweek through the end of the work week
with inland areas warming into the upper 70s and lower/mid 80s.
Temps like this usually wouldnt be too unusual buts its been a
relatively cool March and April. Will see what tonights long
range models show for the weekend. There could be a brief dip in
temps as onshore winds increase with a system passing by to the
north. Some hints in the longer range (next week) for more
pronounced warming for the end of the month.

&&

.PREV DISCUSSION...as of 01:45 PM PDT Monday...Partly to mostly cloudy
sky conditions prevail over the region this afternoon with
temperatures generally in the upper 50s to middle 60s. Rain
showers have mostly ended over the region as a weak short-wave
trough pushed inland and produced mainly less than one-tenth of an
inch over portions of the Central Coast earlier this morning.
Meanwhile, aside from a stray rain shower, mostly dry conditions
are likely through the remainder of the day. In wake of the
exiting system, look for northwest winds to become breezy and
locally gusty along the coast and even a bit stronger over the
Pacific Ocean and adjacent bays.

Otherwise, a gradual warming and drying trend is forecast to begin
on Tuesday and persist through late week as high pressure builds
over the eastern Pacific. This will result in more widespead 60s and
70s across the interior on Tuesday with inland locations warming
into the lower 80s late in the week. A weak short-wave trough is
forecast to approach the region this upcoming weekend and may help
limit additional warming, yet temperatures will remain near to above
seasonal averages. Dry weather conditions are also likely to prevail
through the extended.

&&

.AVIATION...As of 7:14 PM PDT Monday...For 00Z TAFs. VFR/MVFR for
the 00z taf cycle with onshore winds. A 500 mb ridge returns
tonight through Tuesday night with a gradual return of the marine
layer inversion. A steady inflow of water vapor from the subtropics
moves into our coastal waters mid week thus likely increasing night
and morning stratus and fog coverage.

Vicinity of KSFO...VFR, west wind 15 knots with a few gusts to 20
to 25 knots tonight. MVFR ceiling forecast 10z-16z Tuesday, VFR
thereafter into Tuesday afternoon and evening.

SFO Bridge Approach...Similar to KSFO.

Monterey Bay Terminals...MVFR ceilings, west to northwest winds 5
to 10 knots. VFR returning by late Tuesday morning and afternoon.

&&

.MARINE...as of 08:45 PM PDT Monday...Northwesterly winds will
gradually increase overnight and into Tuesday over the waters. The
strongest wills will be observed along the Big Sur Coast where
gale-force gusts are possible tomorrow afternoon. These winds will
result in steep fresh swell  that will be hazardous for small
craft vessels across most of the  waters. A long period northwest
swell arrives this morning and  will gradually build through the
day.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .Tngt...SCA...Pt Arena to Pt Reyes 0-10 nm
             SCA...Pt Reyes to Pigeon Pt 0-10 nm
             SCA...Pigeon Pt to Pt Pinos 0-10 nm
             SCA...Pt Arena to Pigeon Pt 10-60 nm
             SCA...Pigeon Pt to Pt Piedras Blancas 10-60 nm from 11 PM
             SCA...Pt Pinos to Pt Piedras Blancas 0-10 nm
             SCA...Mry Bay until 9 PM

&&

PUBLIC FORECAST: RWW
AVIATION: Canepa
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
Apr 21, 2:37 PM PDTSmall Craft AdvisoryMTR30 hr

Nearby

Gale Warnings in California, 2020Every gale warning in 2020

Sources

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