Alert archive / California / Small Craft Advisories in 2021

Small Craft Advisory 31, NWS San Diego, CA

December 30, 2021

NWS San Diego, CA issued this small craft advisory at Dec 30, 2021, 12:45 PM PST. It took effect at Dec 31, 2021, 8:00 AM PST. It was in force for 18 hr.

The area

The counties it named.

The facts

Issued: Dec 30, 2021, 12:45 PM PST (20:45 UTC)
In effect from: Dec 31, 2021, 8:00 AM PST
Expired: Jan 1, 2022, 2:00 AM PST
In force: 18 hr
Issued by: NWS San Diego, CA

The text

As transmitted.

441 
WHUS76 KSGX 302045
MWWSGX

URGENT - MARINE WEATHER MESSAGE
National Weather Service SAN DIEGO CA
1245 PM PST Thu Dec 30 2021

PZZ750-775-310445-
/O.CAN.KSGX.SC.Y.0030.000000T0000Z-211230T2200Z/
/O.NEW.KSGX.SC.Y.0031.211231T1600Z-220101T1000Z/
Coastal Waters from San Mateo Point to the Mexican Border and out
to 30 nm-
Waters from San Mateo point to the Mexican Border Extending 30 to
60 nm out including San Clemente Island-
1245 PM PST Thu Dec 30 2021

...PREVIOUS SMALL CRAFT ADVISORY RUNNING THROUGH 2 PM TODAY IS 
CANCELLED...

...NEW SMALL CRAFT ADVISORY IN EFFECT FROM 8 AM FRIDAY TO 2 AM 
PST SATURDAY...


* WHAT...West winds 15 to 20 kt with gusts up to 25 kt expected.
  West swells of 8 feet at 8 seconds. 

* WHERE...Coastal Waters from San Mateo Point to the Mexican 
  Border and out to 30 nm and Waters from San Mateo point to the 
  Mexican Border Extending 30 to 60 nm out including San 
  Clemente Island.

* WHEN...From 8 AM Friday to 2 AM PST Saturday.

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

* ADDITIONAL DETAILS...Winds will continue to diminish this
  afternoon and evening before picking back up again Friday morning.
  Elevated swells of 8 feet at 8 seconds will last through late 
  Friday night.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

5 follow-up statements

917 
WHUS76 KSGX 310439
MWWSGX

URGENT - MARINE WEATHER MESSAGE
National Weather Service SAN DIEGO CA
839 PM PST Thu Dec 30 2021

PZZ750-775-311400-
/O.CON.KSGX.SC.Y.0031.211231T1600Z-220101T1000Z/
Coastal Waters from San Mateo Point to the Mexican Border and out
to 30 nm-
Waters from San Mateo point to the Mexican Border Extending 30 to
60 nm out including San Clemente Island-
839 PM PST Thu Dec 30 2021

...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 8 AM FRIDAY TO
2 AM PST SATURDAY...

* WHAT...West winds 15 to 20 kt with gusts up to 25 kt expected. 
  West swells of 8 feet at 8 seconds.

* WHERE...Coastal Waters from San Mateo Point to the Mexican
  Border and out to 60 nm, including San Clemente Island.

* WHEN...From 8 AM Friday to 2 AM PST Saturday.

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

* ADDITIONAL DETAILS...Winds will strengthen again Friday 
  morning. Elevated swells of 8 feet at 8 seconds will last 
  through late Friday night.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

783 
WHUS76 KSGX 311235
MWWSGX

URGENT - MARINE WEATHER MESSAGE
National Weather Service SAN DIEGO CA
435 AM PST Fri Dec 31 2021

PZZ750-775-312230-
/O.CON.KSGX.SC.Y.0031.211231T1600Z-220101T1000Z/
Coastal Waters from San Mateo Point to the Mexican Border and out
to 30 nm-
Waters from San Mateo point to the Mexican Border Extending 30 to
60 nm out including San Clemente Island-
435 AM PST Fri Dec 31 2021

...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 8 AM THIS MORNING
TO 2 AM PST SATURDAY...

* WHAT...Northwest winds 15 to 25 kt with gusts up to 30 kt 
  expected. West swells of up to 7 feet for the inner waters and 
  up to 9 feet for the outer water at 8 second periods.

* WHERE...Coastal Waters from San Mateo Point to the Mexican 
  Border and out to 60 nm, including San Clemente Island.

* WHEN...From 8 AM today to 2 AM PST Saturday.

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

* ADDITIONAL DETAILS...Improving conditions expected through
  the day on Saturday.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

APR

194 
WHUS76 KSGX 312148
MWWSGX

URGENT - MARINE WEATHER MESSAGE
National Weather Service SAN DIEGO CA
148 PM PST Fri Dec 31 2021

PZZ750-775-010600-
/O.CON.KSGX.SC.Y.0031.000000T0000Z-220101T1000Z/
Coastal Waters from San Mateo Point to the Mexican Border and out
to 30 nm-
Waters from San Mateo point to the Mexican Border Extending 30 to
60 nm out including San Clemente Island-
148 PM PST Fri Dec 31 2021

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 2 AM PST
SATURDAY...

* WHAT...Northwest winds 15 to 25 kt with local gusts up to 30 kt
  expected. Combined seas of up to 7 feet in the inner waters and
  up to 9 feet in the outer waters with a dominant period of 8 
  seconds will result in choppy seas.

* WHERE...Coastal Waters from San Mateo Point to the Mexican 
  Border and out to 60 nm, including San Clemente Island.

* WHEN...Through 2 AM PST Saturday.

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

* ADDITIONAL DETAILS...Improving conditions expected through the 
  day on Saturday.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

Maxwell

493 
WHUS76 KSGX 010502
MWWSGX

URGENT - MARINE WEATHER MESSAGE
National Weather Service SAN DIEGO CA
902 PM PST Fri Dec 31 2021

PZZ750-775-011000-
/O.CON.KSGX.SC.Y.0031.000000T0000Z-220101T1000Z/
Coastal Waters from San Mateo Point to the Mexican Border and out
to 30 nm-
Waters from San Mateo point to the Mexican Border Extending 30 to
60 nm out including San Clemente Island-
902 PM PST Fri Dec 31 2021

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 2 AM PST
SATURDAY...

* WHAT...Northwest winds 15 to 25 kt with occasional gusts up to 
  30 kt expected. Combined seas of up to 7 feet in the inner 
  waters and up to 9 feet in the outer waters with a dominant 
  period of 8 seconds will result in choppy seas.

* WHERE...Coastal Waters from San Mateo Point to the Mexican 
  Border and out to 60 nm, including San Clemente Island.

* WHEN...Through 2 AM PST Saturday.

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

* ADDITIONAL DETAILS...Improving conditions expected through the 
  day on Saturday.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

991 
WHUS76 KSGX 011014
MWWSGX

URGENT - MARINE WEATHER MESSAGE
National Weather Service SAN DIEGO CA
214 AM PST Sat Jan 1 2022

PZZ750-775-011115-
/O.EXP.KSGX.SC.Y.0031.000000T0000Z-220101T1000Z/
Coastal Waters from San Mateo Point to the Mexican Border and out
to 30 nm-
Waters from San Mateo point to the Mexican Border Extending 30 to
60 nm out including San Clemente Island-
214 AM PST Sat Jan 1 2022

...SMALL CRAFT ADVISORY HAS EXPIRED...

Gusty northwest winds will subside over the next few hours,
decreasing to 10 to 15 knots by sunrise. The Small Craft Advisory
has been allowed to expire. 

$$

The office that day

Everything else NWS San Diego, CA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Dec 30, 2:50 AM PST	Winter Weather Advisory	SGX	Riverside	9 hr

Nearby

Small Craft Advisories in California, 2021 Every 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.