Alert archive / California / Small Craft Advisories in 2021
Small Craft Advisory 15, NWS San Francisco Bay Area, CA
NWS San Francisco Bay Area, CA issued this small craft advisory at Jan 27, 2021, 5:28 PM PST. It was in force for 22 hr.
The area
The counties it named.
The facts
- Issued
- Jan 27, 2021, 5:28 PM PST (01:28 UTC)
- Expired
- Jan 28, 2021, 3:00 PM PST
- In force
- 22 hr
- Issued by
- NWS San Francisco Bay Area, CA
The text
As transmitted.
732 WHUS76 KMTR 280128 MWWMTR URGENT - MARINE WEATHER MESSAGE National Weather Service San Francisco Bay Area 528 PM PST Wed Jan 27 2021 PZZ565-280930- /O.CON.KMTR.GL.W.0005.000000T0000Z-210128T1100Z/ Coastal Waters from Point Pinos to Point Piedras Blancas California out to 10 nm- 528 PM PST Wed Jan 27 2021 ...GALE WARNING REMAINS IN EFFECT UNTIL 3 AM PST THURSDAY... * WHAT...South winds 20 to 30 kt with gusts up to 55 kt and seas 15 to 17 feet at 15 seconds. * WHERE...Coastal Waters from Point Pinos to Point Piedras Blancas California out to 10 nm. * WHEN...Until 3 AM PST Thursday. * 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. && $$ PZZ530-280900- /O.NEW.KMTR.SC.Y.0015.210128T0128Z-210128T0900Z/ San Pablo Bay, Suisun Bay, the West Delta and the San Francisco Bay north of the Bay Bridge- 528 PM PST Wed Jan 27 2021 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 1 AM PST THURSDAY... * WHAT...Southeast winds 10 to 20 kt with gusts up to 35 kt. * WHERE...San Pablo Bay, Suisun Bay, the West Delta and the San Francisco Bay north of the Bay Bridge. * WHEN...Until 1 AM PST Thursday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ PZZ570-280930- /O.CON.KMTR.SC.Y.0014.000000T0000Z-210128T2300Z/ Waters from Point Arena to Point Reyes 10-60 NM- 528 PM PST Wed Jan 27 2021 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 PM PST THURSDAY... * WHAT...South winds 10 to 20 kt with gusts up to 25 kt and seas 14 to 18 feet at 16 seconds. * WHERE...Waters from Point Arena to Point Reyes 10-60 NM. * WHEN...Until 3 PM PST 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. && $$ PZZ571-280930- /O.CON.KMTR.SC.Y.0014.000000T0000Z-210128T2300Z/ Waters from Point Reyes to Pigeon Point 10-60 NM- 528 PM PST Wed Jan 27 2021 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 PM PST THURSDAY... * WHAT...South winds 15 to 25 kt with gusts up to 35 kt and seas 13 to 17 feet at 16 seconds. * WHERE...Waters from Point Reyes to Pigeon Point 10-60 NM. * WHEN...Until 3 PM PST Thursday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ PZZ575-280930- /O.CON.KMTR.SC.Y.0014.000000T0000Z-210128T2300Z/ Waters from Pigeon Point to Point Pinos 10-60 NM- 528 PM PST Wed Jan 27 2021 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 PM PST THURSDAY... * WHAT...Southwest winds 20 to 30 kt with gusts up to 40 kt and seas 14 to 17 feet at 16 seconds. * WHERE...Waters from Pigeon Point to Point Pinos 10-60 NM. * WHEN...Until 3 PM PST 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. && $$ PZZ576-280930- /O.CON.KMTR.SC.Y.0014.000000T0000Z-210128T2300Z/ Waters from Point Pinos to Point Piedras Blancas 10-60 NM- 528 PM PST Wed Jan 27 2021 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 PM PST THURSDAY... * WHAT...Southwest winds 15 to 25 kt with gusts up to 50 kt and seas 14 to 17 feet at 16 seconds. * WHERE...Waters from Point Pinos to Point Piedras Blancas 10- 60 NM. * WHEN...Until 3 PM PST Thursday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ PZZ540-280930- /O.CON.KMTR.SC.Y.0014.000000T0000Z-210128T2300Z/ Coastal Waters from Point Arena to Point Reyes California out to 10 nm- 528 PM PST Wed Jan 27 2021 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 PM PST THURSDAY... * WHAT...Southeast winds 15 to 25 kt with gusts up to 30 kt and seas 11 to 16 feet at 15 seconds. * WHERE...Coastal Waters from Point Arena to Point Reyes California out to 10 nm. * WHEN...Until 3 PM PST 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. && $$ PZZ545-280930- /O.CON.KMTR.SC.Y.0014.000000T0000Z-210128T2300Z/ Coastal Waters from Point Reyes to Pigeon Point California out to 10 nm- 528 PM PST Wed Jan 27 2021 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 PM PST THURSDAY... * WHAT...South winds 15 to 25 kt with gusts up to 40 kt and seas 10 to 15 feet at 16 seconds, resulting in hazardous conditions near harbor entrances. * WHERE...Coastal Waters from Point Reyes to Pigeon Point California out to 10 nm. * WHEN...Until 3 PM PST Thursday. * IMPACTS...Conditions will be hazardous to small craft especially when navigating in or near harbor entrances. PRECAUTIONARY/PREPAREDNESS ACTIONS... Small craft should use extreme caution when navigating in or near harbor entrances. && $$ PZZ560-280930- /O.CON.KMTR.SC.Y.0014.000000T0000Z-210128T2300Z/ Coastal Waters from Pigeon Point to Point Pinos California out to 10 nm- 528 PM PST Wed Jan 27 2021 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 PM PST THURSDAY... * WHAT...South winds 15 to 25 kt with gusts up to 40 kt and seas 11 to 15 feet at 15 seconds. * WHERE...Coastal Waters from Pigeon Point to Point Pinos California out to 10 nm. * WHEN...Until 3 PM PST 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. && $$ For more information from the National Weather Service visit http://weather.gov/sanfrancisco
5 follow-up statements
371 WHUS76 KMTR 280416 MWWMTR URGENT - MARINE WEATHER MESSAGE National Weather Service San Francisco Bay Area 816 PM PST Wed Jan 27 2021 PZZ565-281100- /O.CON.KMTR.GL.W.0005.000000T0000Z-210128T1100Z/ Coastal Waters from Point Pinos to Point Piedras Blancas California out to 10 nm- 816 PM PST Wed Jan 27 2021 ...GALE WARNING REMAINS IN EFFECT UNTIL 3 AM PST THURSDAY... * WHAT...South winds 20 to 30 kt with gusts up to 55 kt and seas 15 to 17 feet at 15 seconds. * WHERE...Coastal Waters from Point Pinos to Point Piedras Blancas California out to 10 nm. * WHEN...Until 3 AM PST Thursday. * IMPACTS...Strong winds will cause hazardous seas which could capsize or damage vessels and reduce visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners should alter plans to avoid these hazardous conditions. Remain in port, seek safe harbor, alter course, and/or secure the vessel for severe conditions. && $$ PZZ535-281230- /O.EXB.KMTR.SC.Y.0015.210128T0600Z-210128T1700Z/ Monterey Bay- 816 PM PST Wed Jan 27 2021 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 9 AM PST THURSDAY... * WHAT...South winds 15 to 25 kt with gusts up to 35 kt and seas 8 to 13 feet at 15 seconds expected. * WHERE...Monterey Bay. * WHEN...Until 9 AM PST 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. && $$ PZZ570-281230- /O.CON.KMTR.SC.Y.0014.000000T0000Z-210128T2300Z/ Waters from Point Arena to Point Reyes 10-60 NM- 816 PM PST Wed Jan 27 2021 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 PM PST THURSDAY... * WHAT...South winds 10 to 20 kt with gusts up to 25 kt and seas 14 to 16 feet at 16 seconds. * WHERE...Waters from Point Arena to Point Reyes 10-60 NM. * WHEN...Until 3 PM PST Thursday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ PZZ571-281230- /O.CON.KMTR.SC.Y.0014.000000T0000Z-210128T2300Z/ Waters from Point Reyes to Pigeon Point 10-60 NM- 816 PM PST Wed Jan 27 2021 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 PM PST THURSDAY... * WHAT...South winds 15 to 25 kt with gusts up to 35 kt and seas 13 to 17 feet at 16 seconds. * WHERE...Waters from Point Reyes to Pigeon Point 10-60 NM. * WHEN...Until 3 PM PST 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. && $$ PZZ575-281230- /O.CON.KMTR.SC.Y.0014.000000T0000Z-210128T2300Z/ Waters from Pigeon Point to Point Pinos 10-60 NM- 816 PM PST Wed Jan 27 2021 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 PM PST THURSDAY... * WHAT...Southwest winds 15 to 25 kt with occasional gusts up to 40 kt and seas 14 to 17 feet at 16 seconds. * WHERE...Waters from Pigeon Point to Point Pinos 10-60 NM. * WHEN...Until 3 PM PST Thursday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ PZZ576-281230- /O.CON.KMTR.SC.Y.0014.000000T0000Z-210128T2300Z/ Waters from Point Pinos to Point Piedras Blancas 10-60 NM- 816 PM PST Wed Jan 27 2021 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 PM PST THURSDAY... * WHAT...Southwest winds 15 to 25 kt with occasional gusts up to 40 kt and seas 14 to 17 feet at 16 seconds. * WHERE...Waters from Point Pinos to Point Piedras Blancas 10- 60 NM. * WHEN...Until 3 PM PST 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. && $$ PZZ540-281230- /O.CON.KMTR.SC.Y.0014.000000T0000Z-210128T2300Z/ Coastal Waters from Point Arena to Point Reyes California out to 10 nm- 816 PM PST Wed Jan 27 2021 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 PM PST THURSDAY... * WHAT...South winds 15 to 25 kt with gusts up to 30 kt and seas 11 to 16 feet at 15 seconds. * WHERE...Coastal Waters from Point Arena to Point Reyes California out to 10 nm. * WHEN...Until 3 PM PST Thursday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ PZZ545-281230- /O.CON.KMTR.SC.Y.0014.000000T0000Z-210128T2300Z/ Coastal Waters from Point Reyes to Pigeon Point California out to 10 nm- 816 PM PST Wed Jan 27 2021 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 PM PST THURSDAY... * WHAT...South winds 15 to 25 kt with occasional gusts up to 40 kt and seas 10 to 15 feet at 16 seconds, resulting in hazardous conditions near harbor entrances. * WHERE...Coastal Waters from Point Reyes to Pigeon Point California out to 10 nm. * WHEN...Until 3 PM PST Thursday. * IMPACTS...Conditions will be hazardous to small craft especially when navigating in or near harbor entrances. PRECAUTIONARY/PREPAREDNESS ACTIONS... Small craft should use extreme caution when navigating in or near harbor entrances. && $$ PZZ560-281230- /O.CON.KMTR.SC.Y.0014.000000T0000Z-210128T2300Z/ Coastal Waters from Pigeon Point to Point Pinos California out to 10 nm- 816 PM PST Wed Jan 27 2021 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 PM PST THURSDAY... * WHAT...Southwest winds 15 to 25 kt with occasional gusts up to 40 kt and seas 11 to 15 feet at 15 seconds. * WHERE...Coastal Waters from Pigeon Point to Point Pinos California out to 10 nm. * WHEN...Until 3 PM PST Thursday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ PZZ530-280900- /O.CON.KMTR.SC.Y.0015.000000T0000Z-210128T0900Z/ San Pablo Bay, Suisun Bay, the West Delta and the San Francisco Bay north of the Bay Bridge- 816 PM PST Wed Jan 27 2021 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 1 AM PST THURSDAY... * WHAT...Southeast winds 10 to 20 kt with gusts up to 35 kt. * WHERE...San Pablo Bay, Suisun Bay, the West Delta and the San Francisco Bay north of the Bay Bridge. * WHEN...Until 1 AM PST 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. && $$ For more information from the National Weather Service visit http://weather.gov/sanfrancisco
054 WHUS76 KMTR 280832 MWWMTR URGENT - MARINE WEATHER MESSAGE National Weather Service San Francisco Bay Area 1232 AM PST Thu Jan 28 2021 PZZ530-280945- /O.EXP.KMTR.SC.Y.0015.000000T0000Z-210128T0900Z/ San Pablo Bay, Suisun Bay, the West Delta and the San Francisco Bay north of the Bay Bridge- 1232 AM PST Thu Jan 28 2021 ...SMALL CRAFT ADVISORY WILL EXPIRE AT 1 AM PST EARLY THIS MORNING... Winds have subside so the advisory will be allowed to expire. $$ PZZ565-281100- /O.CON.KMTR.GL.W.0005.000000T0000Z-210128T1100Z/ Coastal Waters from Point Pinos to Point Piedras Blancas California out to 10 nm- 1232 AM PST Thu Jan 28 2021 ...GALE WARNING REMAINS IN EFFECT UNTIL 3 AM PST EARLY THIS MORNING... * WHAT...South winds 25 to 30 kt with gusts up to 50 kt and seas 15 to 17 feet at 15 seconds. * WHERE...Coastal Waters from Point Pinos to Point Piedras Blancas California out to 10 nm. * WHEN...Until 3 AM PST early this morning. * 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. && $$ PZZ570-281645- /O.CON.KMTR.SC.Y.0014.000000T0000Z-210128T2300Z/ Waters from Point Arena to Point Reyes 10-60 NM- 1232 AM PST Thu Jan 28 2021 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 PM PST THIS AFTERNOON... * WHAT...Southwest winds 10 to 20 kt with gusts up to 25 kt and seas 14 to 16 feet at 16 seconds. * WHERE...Waters from Point Arena to Point Reyes 10-60 NM. * WHEN...Until 3 PM PST this afternoon. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ PZZ571-281645- /O.CON.KMTR.SC.Y.0014.000000T0000Z-210128T2300Z/ Waters from Point Reyes to Pigeon Point 10-60 NM- 1232 AM PST Thu Jan 28 2021 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 PM PST THIS AFTERNOON... * WHAT...Southwest winds 15 to 25 kt with gusts up to 35 kt and seas 13 to 17 feet at 16 seconds. * WHERE...Waters from Point Reyes to Pigeon Point 10-60 NM. * WHEN...Until 3 PM PST 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. && $$ PZZ575-281645- /O.CON.KMTR.SC.Y.0014.000000T0000Z-210128T2300Z/ Waters from Pigeon Point to Point Pinos 10-60 NM- 1232 AM PST Thu Jan 28 2021 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 PM PST THIS AFTERNOON... * WHAT...Southwest winds 20 to 30 kt with gusts up to 40 kt and seas 14 to 17 feet at 16 seconds. * WHERE...Waters from Pigeon Point to Point Pinos 10-60 NM. * WHEN...Until 3 PM PST this afternoon. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ PZZ576-281645- /O.CON.KMTR.SC.Y.0014.000000T0000Z-210128T2300Z/ Waters from Point Pinos to Point Piedras Blancas 10-60 NM- 1232 AM PST Thu Jan 28 2021 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 PM PST THIS AFTERNOON... * WHAT...Southwest winds 15 to 25 kt with gusts up to 40 kt and seas 14 to 17 feet at 16 seconds. * WHERE...Waters from Point Pinos to Point Piedras Blancas 10- 60 NM. * WHEN...Until 3 PM PST 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. && $$ PZZ540-281645- /O.CON.KMTR.SC.Y.0014.000000T0000Z-210128T2300Z/ Coastal Waters from Point Arena to Point Reyes California out to 10 nm- 1232 AM PST Thu Jan 28 2021 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 PM PST THIS AFTERNOON... * WHAT...South winds 15 to 25 kt with gusts up to 30 kt and seas 11 to 16 feet at 15 seconds. * WHERE...Coastal Waters from Point Arena to Point Reyes California out to 10 nm. * WHEN...Until 3 PM PST this afternoon. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ PZZ545-281645- /O.CON.KMTR.SC.Y.0014.000000T0000Z-210128T2300Z/ Coastal Waters from Point Reyes to Pigeon Point California out to 10 nm- 1232 AM PST Thu Jan 28 2021 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 PM PST THIS AFTERNOON... * WHAT...South winds 15 to 25 kt with gusts up to 40 kt and seas 10 to 15 feet at 16 seconds, resulting in hazardous conditions near harbor entrances. * WHERE...Coastal Waters from Point Reyes to Pigeon Point California out to 10 nm. * WHEN...Until 3 PM PST this afternoon. * IMPACTS...Conditions will be hazardous to small craft especially when navigating in or near harbor entrances. PRECAUTIONARY/PREPAREDNESS ACTIONS... Small craft should use extreme caution when navigating in or near harbor entrances. && $$ PZZ560-281645- /O.CON.KMTR.SC.Y.0014.000000T0000Z-210128T2300Z/ Coastal Waters from Pigeon Point to Point Pinos California out to 10 nm- 1232 AM PST Thu Jan 28 2021 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 PM PST THIS AFTERNOON... * WHAT...Southwest winds 15 to 25 kt with gusts up to 40 kt and seas 11 to 15 feet at 15 seconds. * WHERE...Coastal Waters from Pigeon Point to Point Pinos California out to 10 nm. * WHEN...Until 3 PM PST this afternoon. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ PZZ535-281645- /O.CON.KMTR.SC.Y.0015.000000T0000Z-210128T1700Z/ Monterey Bay- 1232 AM PST Thu Jan 28 2021 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 9 AM PST THIS MORNING... * WHAT...South winds 15 to 25 kt with gusts up to 35 kt and seas 8 to 13 feet at 15 seconds. * WHERE...Monterey Bay. * WHEN...Until 9 AM PST 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. && $$ For more information from the National Weather Service visit http://weather.gov/sanfrancisco
100 WHUS76 KMTR 281045 MWWMTR URGENT - MARINE WEATHER MESSAGE National Weather Service San Francisco Bay Area 245 AM PST Thu Jan 28 2021 PZZ565-281845- /O.CAN.KMTR.GL.W.0005.000000T0000Z-210128T1100Z/ /O.EXB.KMTR.SC.Y.0015.210128T1100Z-210128T2300Z/ Coastal Waters from Point Pinos to Point Piedras Blancas California out to 10 nm- 245 AM PST Thu Jan 28 2021 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 3 PM PST THIS AFTERNOON... * WHAT...South winds 15 to 20 kt with gusts up to 35 kt and seas 12 to 14 feet at 15 seconds expected. * WHERE...Coastal Waters from Point Pinos to Point Piedras Blancas California out to 10 nm. * WHEN...Until 3 PM PST this afternoon. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ PZZ570-281845- /O.EXT.KMTR.SC.Y.0014.000000T0000Z-210129T1100Z/ Waters from Point Arena to Point Reyes 10-60 NM- 245 AM PST Thu Jan 28 2021 ...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 3 AM PST FRIDAY... * WHAT...Seas 10 to 15 feet at 15 seconds. * WHERE...Waters from Point Arena to Point Reyes 10-60 NM. * WHEN...Until 3 AM PST 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. && $$ PZZ571-281845- /O.EXT.KMTR.SC.Y.0014.000000T0000Z-210129T1100Z/ Waters from Point Reyes to Pigeon Point 10-60 NM- 245 AM PST Thu Jan 28 2021 ...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 3 AM PST FRIDAY... * WHAT...Southwest winds 5 to 15 kt with gusts up to 35 kt and seas 11 to 16 feet at 15 seconds. * WHERE...Waters from Point Reyes to Pigeon Point 10-60 NM. * WHEN...Until 3 AM PST Friday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ PZZ575-281845- /O.EXT.KMTR.SC.Y.0014.000000T0000Z-210129T1100Z/ Waters from Pigeon Point to Point Pinos 10-60 NM- 245 AM PST Thu Jan 28 2021 ...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 3 AM PST FRIDAY... * WHAT...Southwest winds 10 to 20 kt with gusts up to 35 kt and seas 10 to 15 feet at 16 seconds. * WHERE...Waters from Pigeon Point to Point Pinos 10-60 NM. * WHEN...Until 3 AM PST 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. && $$ PZZ576-281845- /O.EXT.KMTR.SC.Y.0014.000000T0000Z-210129T1100Z/ Waters from Point Pinos to Point Piedras Blancas 10-60 NM- 245 AM PST Thu Jan 28 2021 ...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 3 AM PST FRIDAY... * WHAT...Southwest winds 10 to 20 kt with gusts up to 35 kt and seas 11 to 16 feet at 16 seconds. * WHERE...Waters from Point Pinos to Point Piedras Blancas 10- 60 NM. * WHEN...Until 3 AM PST Friday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ PZZ535-281845- /O.EXT.KMTR.SC.Y.0015.000000T0000Z-210128T2300Z/ Monterey Bay- 245 AM PST Thu Jan 28 2021 ...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 3 PM PST THIS AFTERNOON... * WHAT...South winds 10 to 20 kt with gusts up to 35 kt and seas 6 to 11 feet at 15 seconds. * WHERE...Monterey Bay. * WHEN...Until 3 PM PST 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. && $$ PZZ540-281845- /O.CON.KMTR.SC.Y.0014.000000T0000Z-210128T2300Z/ Coastal Waters from Point Arena to Point Reyes California out to 10 nm- 245 AM PST Thu Jan 28 2021 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 PM PST THIS AFTERNOON... * WHAT...Seas 11 to 14 feet at 15 seconds. * WHERE...Coastal Waters from Point Arena to Point Reyes California out to 10 nm. * WHEN...Until 3 PM PST this afternoon. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ PZZ545-281845- /O.CON.KMTR.SC.Y.0014.000000T0000Z-210128T2300Z/ Coastal Waters from Point Reyes to Pigeon Point California out to 10 nm- 245 AM PST Thu Jan 28 2021 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 PM PST THIS AFTERNOON... * WHAT...Southwest winds 10 to 20 kt with gusts up to 35 kt and seas 8 to 13 feet at 15 seconds, resulting in hazardous conditions near harbor entrances. * WHERE...Coastal Waters from Point Reyes to Pigeon Point California out to 10 nm. * WHEN...Until 3 PM PST this afternoon. * IMPACTS...Conditions will be hazardous to small craft especially when navigating in or near harbor entrances. PRECAUTIONARY/PREPAREDNESS ACTIONS... Small craft should use extreme caution when navigating in or near harbor entrances. && $$ PZZ560-281845- /O.CON.KMTR.SC.Y.0014.000000T0000Z-210128T2300Z/ Coastal Waters from Pigeon Point to Point Pinos California out to 10 nm- 245 AM PST Thu Jan 28 2021 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 PM PST THIS AFTERNOON... * WHAT...South winds 10 to 20 kt with gusts up to 35 kt and seas 10 to 13 feet at 15 seconds. * WHERE...Coastal Waters from Pigeon Point to Point Pinos California out to 10 nm. * WHEN...Until 3 PM PST this afternoon. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ For more information from the National Weather Service visit http://weather.gov/sanfrancisco
066 WHUS76 KMTR 281657 MWWMTR URGENT - MARINE WEATHER MESSAGE National Weather Service San Francisco Bay Area 857 AM PST Thu Jan 28 2021 PZZ570-290100- /O.CON.KMTR.SC.Y.0014.000000T0000Z-210129T1100Z/ Waters from Point Arena to Point Reyes 10-60 NM- 857 AM PST Thu Jan 28 2021 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 AM PST FRIDAY... * WHAT...Seas 10 to 13 feet at 15 seconds. * WHERE...Waters from Point Arena to Point Reyes 10-60 NM. * WHEN...Until 3 AM PST 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. && $$ PZZ571-290100- /O.CON.KMTR.SC.Y.0014.000000T0000Z-210129T1100Z/ Waters from Point Reyes to Pigeon Point 10-60 NM- 857 AM PST Thu Jan 28 2021 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 AM PST FRIDAY... * WHAT...West winds 5 to 15 kt and seas 9 to 14 feet at 15 seconds. * WHERE...Waters from Point Reyes to Pigeon Point 10-60 NM. * WHEN...Until 3 AM PST Friday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ PZZ575-290100- /O.CON.KMTR.SC.Y.0014.000000T0000Z-210129T1100Z/ Waters from Pigeon Point to Point Pinos 10-60 NM- 857 AM PST Thu Jan 28 2021 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 AM PST FRIDAY... * WHAT...West winds 10 to 20 kt with gusts up to 25 kt and seas 10 to 14 feet at 15 seconds. * WHERE...Waters from Pigeon Point to Point Pinos 10-60 NM. * WHEN...Until 3 AM PST 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. && $$ PZZ576-290100- /O.CON.KMTR.SC.Y.0014.000000T0000Z-210129T1100Z/ Waters from Point Pinos to Point Piedras Blancas 10-60 NM- 857 AM PST Thu Jan 28 2021 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 AM PST FRIDAY... * WHAT...Southwest winds 10 to 15 kt and seas 10 to 14 feet at 15 seconds. * WHERE...Waters from Point Pinos to Point Piedras Blancas 10- 60 NM. * WHEN...Until 3 AM PST Friday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ PZZ540-282300- /O.CON.KMTR.SC.Y.0014.000000T0000Z-210128T2300Z/ Coastal Waters from Point Arena to Point Reyes California out to 10 nm- 857 AM PST Thu Jan 28 2021 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 PM PST THIS AFTERNOON... * WHAT...Seas 11 to 13 feet at 15 seconds. * WHERE...Coastal Waters from Point Arena to Point Reyes California out to 10 nm. * WHEN...Until 3 PM PST 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. && $$ PZZ545-282300- /O.CON.KMTR.SC.Y.0014.000000T0000Z-210128T2300Z/ Coastal Waters from Point Reyes to Pigeon Point California out to 10 nm- 857 AM PST Thu Jan 28 2021 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 PM PST THIS AFTERNOON... * WHAT...Southwest winds 10 to 20 kt with gusts up to 25 kt and seas 8 to 12 feet at 15 seconds, resulting in hazardous conditions near harbor entrances. * WHERE...Coastal Waters from Point Reyes to Pigeon Point California out to 10 nm. * WHEN...Until 3 PM PST this afternoon. * IMPACTS...Conditions will be hazardous to small craft especially when navigating in or near harbor entrances. PRECAUTIONARY/PREPAREDNESS ACTIONS... Small craft should use extreme caution when navigating in or near harbor entrances. && $$ PZZ560-282300- /O.CON.KMTR.SC.Y.0014.000000T0000Z-210128T2300Z/ Coastal Waters from Pigeon Point to Point Pinos California out to 10 nm- 857 AM PST Thu Jan 28 2021 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 PM PST THIS AFTERNOON... * WHAT...Southwest winds 10 to 20 kt with gusts up to 25 kt and seas 10 to 12 feet at 15 seconds. * WHERE...Coastal Waters from Pigeon Point to Point Pinos California out to 10 nm. * WHEN...Until 3 PM PST 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. && $$ PZZ565-282300- /O.CON.KMTR.SC.Y.0015.000000T0000Z-210128T2300Z/ Coastal Waters from Point Pinos to Point Piedras Blancas California out to 10 nm- 857 AM PST Thu Jan 28 2021 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 PM PST THIS AFTERNOON... * WHAT...South winds 15 to 20 kt with gusts up to 30 kt and seas 12 to 14 feet at 15 seconds. * WHERE...Coastal Waters from Point Pinos to Point Piedras Blancas California out to 10 nm. * WHEN...Until 3 PM PST this afternoon. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ PZZ535-282300- /O.CON.KMTR.SC.Y.0015.000000T0000Z-210128T2300Z/ Monterey Bay- 857 AM PST Thu Jan 28 2021 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 PM PST THIS AFTERNOON... * WHAT...South winds 10 to 20 kt with gusts up to 25 kt. * WHERE...Monterey Bay. * WHEN...Until 3 PM PST 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. && $$ For more information from the National Weather Service visit http://weather.gov/sanfrancisco
741 WHUS76 KMTR 282259 MWWMTR URGENT - MARINE WEATHER MESSAGE National Weather Service San Francisco Bay Area 259 PM PST Thu Jan 28 2021 PZZ540-290000- /O.EXP.KMTR.SC.Y.0014.000000T0000Z-210128T2300Z/ Coastal Waters from Point Arena to Point Reyes California out to 10 nm- 259 PM PST Thu Jan 28 2021 ...SMALL CRAFT ADVISORY WILL EXPIRE AT 3 PM PST THIS AFTERNOON... Seas have fallen below small craft criteria. $$ PZZ545-290000- /O.EXP.KMTR.SC.Y.0014.000000T0000Z-210128T2300Z/ Coastal Waters from Point Reyes to Pigeon Point California out to 10 nm- 259 PM PST Thu Jan 28 2021 ...SMALL CRAFT ADVISORY WILL EXPIRE AT 3 PM PST THIS AFTERNOON... Seas have fallen below small craft criteria. $$ PZZ560-290000- /O.EXP.KMTR.SC.Y.0014.000000T0000Z-210128T2300Z/ Coastal Waters from Pigeon Point to Point Pinos California out to 10 nm- 259 PM PST Thu Jan 28 2021 ...SMALL CRAFT ADVISORY WILL EXPIRE AT 3 PM PST THIS AFTERNOON... Seas have fallen below small craft criteria. $$ PZZ565-290000- /O.EXP.KMTR.SC.Y.0015.000000T0000Z-210128T2300Z/ Coastal Waters from Point Pinos to Point Piedras Blancas California out to 10 nm- 259 PM PST Thu Jan 28 2021 ...SMALL CRAFT ADVISORY WILL EXPIRE AT 3 PM PST THIS AFTERNOON... Seas have fallen below small craft criteria. $$ PZZ535-290000- /O.EXP.KMTR.SC.Y.0015.000000T0000Z-210128T2300Z/ Monterey Bay- 259 PM PST Thu Jan 28 2021 ...SMALL CRAFT ADVISORY WILL EXPIRE AT 3 PM PST THIS AFTERNOON... Seas have fallen below small craft criteria. $$ PZZ570-290700- /O.CON.KMTR.SC.Y.0014.000000T0000Z-210129T1100Z/ Waters from Point Arena to Point Reyes 10-60 NM- 259 PM PST Thu Jan 28 2021 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 AM PST FRIDAY... * WHAT...Seas 10 to 12 feet at 14 seconds. * WHERE...Waters from Point Arena to Point Reyes 10-60 NM. * WHEN...Until 3 AM PST 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. && $$ PZZ571-290700- /O.CON.KMTR.SC.Y.0014.000000T0000Z-210129T1100Z/ Waters from Point Reyes to Pigeon Point 10-60 NM- 259 PM PST Thu Jan 28 2021 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 AM PST FRIDAY... * WHAT...Seas 9 to 13 feet at 14 seconds. * WHERE...Waters from Point Reyes to Pigeon Point 10-60 NM. * WHEN...Until 3 AM PST Friday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ PZZ575-290700- /O.CON.KMTR.SC.Y.0014.000000T0000Z-210129T1100Z/ Waters from Pigeon Point to Point Pinos 10-60 NM- 259 PM PST Thu Jan 28 2021 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 AM PST FRIDAY... * WHAT...Seas 10 to 13 feet at 14 seconds. * WHERE...Waters from Pigeon Point to Point Pinos 10-60 NM. * WHEN...Until 3 AM PST 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. && $$ PZZ576-290700- /O.CON.KMTR.SC.Y.0014.000000T0000Z-210129T1100Z/ Waters from Point Pinos to Point Piedras Blancas 10-60 NM- 259 PM PST Thu Jan 28 2021 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 AM PST FRIDAY... * WHAT...Seas 10 to 13 feet at 15 seconds. * WHERE...Waters from Point Pinos to Point Piedras Blancas 10- 60 NM. * WHEN...Until 3 AM PST Friday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ For more information from the National Weather Service visit http://weather.gov/sanfrancisco
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 Jan 27, 4:55 PM PST, 33 minutes earlier.
Area forecast discussion, Jan 27, 4:55 PM PST, 33 minutes before
Area Forecast Discussion
National Weather Service San Francisco Bay Area
455 PM PST Wed Jan 27 2021
.SYNOPSIS...The atmospheric river stalled over Big Sur around
sunrise but has since pivoted northward towards southern Santa
Cruz this afternoon, renewing flash flood and debris risk at the
CZU and Monterey burn scars. Secondary air mass boundaries will
bring moderate to heavy showers and thunderstorms into Thursday,
prompting renewed flash flood watch on the LNU burn scars. Rain
tapers off Friday for most. Another system arrives late this
weekend into early next week and will bring predominately
beneficial rainfall.
&&
.DISCUSSION..as of 01:30 PM PST Wednesday... An unusually cold
atmospheric river event impacted the region overnight, bringing
powerful southerly wind gusts ranging from 40-80mph regionwide,
as well as intense heavy rain along an intense narrow cold frontal
rain band, localized debris flow and slides, in addition to some
novelty snow accumulations in the regional hills and mountains and
significant snow accumulations in the Sierra Nevada. The ongoing
atmospheric river event followed the footsteps of two weaker cold
fronts in that they shared a broader parent longwave trough
situated along the western CONUS. This allowed the previous two
cold, weaker storm systems to rapidly sweep through the region
over the previous week with minimal downstream impediments from
longer wave ridging. Similarly, this atmospheric river swept
through the region quicker and more progressively than had been
modeled days out. This is relevant as it minimized the total
duration of the peak winds and rain rates overnight and mitigated
the potential impacts experienced through the dark of night last
night.
Forecast models have been stubborn in insisting that the
atmospheric river would stall as shifted southward and encountered
the Big Sur region around sunrise this morning. Satellite and
radar imagery confirmed this stall occuring over a region
encompassing the Dolan wildfire burn scar in southern Monterey
county southward to northern San Luis Obispo counties.
The atmospheric river remained stalled in place only temporarily,
however, as at approximately 10AM, the atmospheric river began to
reorient from a predominately westerly feed into a more intense
southwesterly feed. The reorientation of the storm system is due
to the arrival of a vigorous, rapidly digging vorticity wave
sliding down on the lee side of the trough approx 650 miles west
of Monterey. The sliding vort wave is imparting additional energy
into the base of the trough, causing it to dig southward, while at
the same time kicking/ejecting the core of the storm system
towards the northeast. By stretching the storms feed towards the
SW and upper dynamics to the NE, this is reorienting the
atmospheric river through midday.
The reorientation is significant because a negatively tilted
trough (which is what this has transitioned into) is much more
favorable for deeper convective enhancement due to stronger upper
dynamics/divergence aloft. Furthermore, while a slight northward
jog of the atmospheric river plume was expected today, it has
migrated farther northward and at a quicker pace than model data
suggested it would (approx 40-60 miles northward in 120-150
minutes). Consequently, radar and satellite imagery confirmed
rapid intensification of the cold front/atmospheric river as it
reoriented towards a negative tilt and tapped into stronger
dynamics aloft. New flash flood warnings for the River, Carmel,
and CZU burn scars have been issued through midday as a
backbuilding line of deeper convection developed upstream and
parallel of the main frontal boundary.
Latest thinking (as of noon, now confirmed) is that a training
line of moderate to strong convective cells may form along a
secondary/tertiary boundary (as of 1PM this is occurring) and bring
renewed threats of debris flow/flash flood risk to the burn scars.
Given most forecast models failed to capture the current
scenario, we are now questioning how far northward the AR will jog
as it reorients into a negative tilt -- and perhaps, if and where
it may stall again before continuing to progress southward into
Southern California. This line of cells (as of 130PM) currently
features the most intense radar indicated rain rates seen with
this storm system so far. Additional rainfall accumulations in the
inches are still ahead of us with this storm system.
In short, this is an extremely dynamic and potentially dangerous
situation for the burn scars with sparse reliable model guidance
to look towards, so real time observations/nowcasting is more
important than ever as the AR resurges over high risk wildfire
burn scars. If in a risk area for slides, flash flooding, or
debris flow, please remain extremely vigilant of your surroundings
and the latest weather information for your area either through
social media, radio, or local TV.
Frontal boundary aside, an area of weaker convective developed in
the unstable air mass residing over the North Bay... a number of
reports of small hail came in over the area through the day today.
Expect to continue to see sporadic hit or miss light to moderate
showers across the broader region through at least the end of
Thursday.
Even farther north, a strengthening secondary air mass boundary is
becoming evident off of Cape Mendocino. The development of secondary
boundaries was not unexpected as short to near term convective
models indicated they would be likely and prevailing SE winds
in the wake of the atmospheric river cold front strengthened the
theory. Numerous, rapidly strengthening convective cells have been
forming along this air mass boundary so far today and have begun
to coalesce into cohesive convective-backed rain band. Latest
model guidance suggests this secondary convective rain band will
transition southward and begin to impact the region tonight
through Thursday. These deep, rapidly strengthening convective
cells are prerequisites for intense rain rates that may lead to
flash flooding and/or debris flow risk in burn scars and as a
result the flash flood watch for the LNU burn scars in the North
Bay have been reissued through tomorrow afternoon. Additional
showers and isolated thunderstorms are also possible aside from
these primary or secondary rain bands.
Main forecast focus today has been on the ongoing events, so not
much time left to discuss beyond the current storm. That said,
mostly dry Friday, then another system will bring light rain to
the North Bay beginning late Friday into the weekend. A moderate
system then arrives late this weekend and will bring another
round of beneficial rainfall across the entirety of the San
Francisco Bay Area and Central Coast. Drier weather finally
returns around mid week next week. More details as soon as the
current storm system departs the region.
&&
.AVIATION...as of 03:32 PM PST Wednesday...For the 00Z TAFs.
Generally MVFR conditions, occasionally VFR, prevailing throughout
the taf period as the atmospheric river continues to impact the
Central Coast. Generally light to moderate rainfall north of the
SF Bay Area and moderate to heavier showers south of San Jose.
Winds will remain out of the S/SE through tomorrow before finally
veering towards the SW/W/NW later tomorrow into Friday once the AR
exits the region. Until then, expect periods of breezy S/SE
winds, showers, and MVFR cigs. Reduced vis/cigs during heavier
showers expected. A secondary line of convective showers is
currently north of the region and is at this time expected to
impact the region tonight into tomorrow. This will bring periods
of heavy convective showers, gusty winds, and possible isolated
thunderstorms. Stronger southerly winds and heavier rains for
Monterey County and southward.
Vicinity of KSFO...Predominately MVFR with breezy to gusty S-SE
winds and scattered to widespread showers today. Low confidence on
wind speeds/gusts and timing of showers. Given showery nature of
weather today and tomorrow, expect intermittent up and down of
visbys/cigs/rain rates/winds, though predominate conditions will
feature BKN-OVC decks at 2000-5000 ft AGl, 4-6SM visibility, S-SE
winds 10-20 kt with gusts 20-30 kt and -SHRA.
SFO Bridge Approach...Similar to KSFO.
Monterey Bay Terminals...Flight paths of KMRY/KSNS will encounter
the peak intensity of the atmospheric river through tomorrow.
Otherwise, predominately MVFR with breezy to gusty S-SE winds and
scattered to widespread showers today. Low confidence on wind
speeds/gusts and timing of showers. Given showery nature of
weather today and tomorrow, expect intermittent up and down of
visbys/cigs/rain rates/winds, though predominate conditions will
feature BKN-OVC decks at 2000-5000 ft AGl, 3-6SM visibility, S-SE
winds 10-20 kt with gusts 20-30 kt.
&&
.MARINE...as of 12:14 PM PST Wednesday...The atmospheric river
boundary has shifted southward and is currently focused south of
Point Sur closer to Point Piedras Blancas. Local gale to storm
force winds out of the south and very steep fresh seas can be
expected along the southern Big Sur coast through the day today as
a result. North of the front, winds have weakened significantly
but remain breezy and out of the south. Winds north of the front
will become occasionally gusty up to 25-35kt this afternoon
between Pt Reyes and Point Sur as the storm systems reverses
northward slightly. Isolated to scattered showers and
thunderstorms north of the front are expected today and may bring
brief heavy rainfall, hail, erratic gusty winds, or generate
waterspouts. Otherwise, a steep northwest swell will move through
the waters today alongside the fresh wind driven seas.
&&
.MTR WATCHES/WARNINGS/ADVISORIES...
.Tngt...Wind Advisory...CAZ516>518-528-530
Flash Flood Watch...CAZ507-511-512-517
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
GLW...Pt Pinos to Pt Piedras Blancas 0-10 nm until 3 AM
&&
PUBLIC FORECAST: DRP
AVIATION: AS
MARINE: DRP
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www.facebook.com/nwsbayarea
www.twitter.com/nwsbayarea
www.youtube.com/nwsbayareaIn the hours before
Local storm report, Jan 27, 4:31 PM PST, 57 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO CA
431 PM PST WED JAN 27 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0425 PM FLOOD 1 W SALINAS 36.69N 121.65W
01/27/2021 MONTEREY CA LAW ENFORCEMENT
ROADWAY FLOODING AT US-101 N AND MAIN ST.
FLOODING IS CAUSING VEHICLES TO HYDROPLANE.
&&Local storm report, Jan 27, 5:04 PM PST, 24 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO CA
504 PM PST WED JAN 27 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0400 AM NON-TSTM WND DMG 3 SSW MONTEREY 36.56N 121.90W
01/27/2021 MONTEREY CA BROADCAST MEDIA
NEWS MEDIA REPORTED A LARGE PINE TREE FELL
INTO A HOUSE ON CANADA COURT IN CARMEL
OVERNIGHT TUESDAY. EXACT TIMING NOT KNOWN.
&&Local storm report, Jan 27, 5:06 PM PST, 22 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO CA
506 PM PST WED JAN 27 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0501 PM DEBRIS FLOW 2 NE BOLINAS 37.93N 122.68W
01/27/2021 MARIN CA LAW ENFORCEMENT
ROCKSLIDE ONTO ROADWAY AT SR-1 NEAR BOLINAS.
&&Local storm report, Jan 27, 5:15 PM PST, 13 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO CA
515 PM PST WED JAN 27 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0512 PM FLOOD 8 SE SALINAS 36.60N 121.55W
01/27/2021 MONTEREY CA LAW ENFORCEMENT
ROADWAY FLOODING AT US-101 N AND ESPERANZA
RD.
&&Local storm report, Jan 27, 5:20 PM PST, 8 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO CA
520 PM PST WED JAN 27 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0515 PM NON-TSTM WND DMG 2 ENE SANTA CLARA 37.38N 121.94W
01/27/2021 SANTA CLARA CA LAW ENFORCEMENT
LARGE TREE LIMB DOWN ON US-101 S AND TRIMBLE
RD.
&&Local storm report, Jan 27, 5:21 PM PST, 7 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO CA
521 PM PST WED JAN 27 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0518 PM FLOOD 3 NNW MORGAN HILL 37.16N 121.66W
01/27/2021 SANTA CLARA CA LAW ENFORCEMENT
ROADWAY FLOODING ON US-101 N AND BURNETT.
&&The office that day
Everything else NWS San Francisco Bay Area, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 27, 4:02 PM PST | Areal Flood Advisory | MTR | Monterey, San Benito | 3 hr |
| Jan 27, 4:19 PM PST | Flash Flood Warning | MTR | Monterey | 5 hr |
| Jan 27, 7:02 PM PST | Flash Flood Warning | MTR | Monterey | 3 hr |
| Jan 27, 7:05 PM PST | Flash Flood Warning | MTR | Monterey | 3 hr |
| Jan 27, 7:32 PM PST | Areal Flood Advisory | MTR | Monterey, San Benito, Santa Clara, Santa Cruz | 3 hr |
| Jan 27, 10:39 PM PST | Areal Flood Advisory | MTR | Monterey, San Benito, Santa Clara, Santa Cruz | 4 hr |
| Jan 28, 4:33 AM PST | Areal Flood Advisory | MTR | Monterey, San Benito, Santa Clara, Santa Cruz | 11 hr |
| Jan 28, 4:59 AM PST | Areal Flood Warning | MTR | Monterey | 9 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.