Marine Weather and Tide Forecast for Pacheco, CA
December 5, 2023 7:39 AM PST (15:39 UTC)
Sunrise 7:07AM Sunset 4:50PM Moonrise 12:00AM Moonset 12:59PM
PZZ530 San Pablo Bay, Suisun Bay, The West Delta And The San Francisco Bay North Of The Bay Bridge- 311 Am Pst Tue Dec 5 2023
.dense fog advisory in effect until 11 am pst this morning...
Today..NE winds 5 to 10 knots. Patchy dense fog this morning.
Tonight..SW winds 5 to 10 knots. Rain likely.
Wed..S winds 10 to 15 knots with gusts up to 25 knots. Rain.
Wed night..W winds 10 to 15 knots. Rain likely.
Thu..W winds 5 to 10 knots. A chance of rain.
Thu night..NW winds 10 to 15 knots.
Fri..NW winds 5 to 10 knots.
Sat..N winds around 5 knots.
.dense fog advisory in effect until 11 am pst this morning...
Today..NE winds 5 to 10 knots. Patchy dense fog this morning.
Tonight..SW winds 5 to 10 knots. Rain likely.
Wed..S winds 10 to 15 knots with gusts up to 25 knots. Rain.
Wed night..W winds 10 to 15 knots. Rain likely.
Thu..W winds 5 to 10 knots. A chance of rain.
Thu night..NW winds 10 to 15 knots.
Fri..NW winds 5 to 10 knots.
Sat..N winds around 5 knots.
PZZ500 311 Am Pst Tue Dec 5 2023
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries...
light winds continuing across the waters, except near point sur where breezy northerly winds persist until later this morning. Another round of dense fog continues over the san francisco bay, san pablo bay, and the delta and will diminish towards the early afternoon. Elevated seas between 12-17 feet will persist for much of the week as a series of long period northwest swells propagate through the waters, resulting in hazardous conditions for small craft operators. Chances of rain over the waters will begin tonight through the end of the work week.
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries...
light winds continuing across the waters, except near point sur where breezy northerly winds persist until later this morning. Another round of dense fog continues over the san francisco bay, san pablo bay, and the delta and will diminish towards the early afternoon. Elevated seas between 12-17 feet will persist for much of the week as a series of long period northwest swells propagate through the waters, resulting in hazardous conditions for small craft operators. Chances of rain over the waters will begin tonight through the end of the work week.
Area Discussion for - San Francisco/Monterey Bay Area, CA
(on/off) HelpNOTE: mouseover dotted underlined text for definition
FXUS66 KMTR 051140 AFDMTR
Area Forecast Discussion National Weather Service San Francisco CA 340 AM PST Tue Dec 5 2023
New AVIATION, MARINE, BEACHES
SYNOPSIS
Issued at 155 AM PST Tue Dec 5 2023
Dense fog is being reported across the North Bay interior valleys and SF Bay. Fog is expected to spread south and will impact more of the bay shoreline and Santa Clara valley by sunrise, thus Dense Fog Advisories are in effect until 11 AM. Nice and warm conditions are expected by the afternoon today. Rain is on track to arrive early Wednesday morning, bringing beneficial rain to the region. Cold morning temperatures expected at the end of the week.
SHORT TERM
(Today and tonight)
Issued at 155 AM PST Tue Dec 5 2023
Night fog GOES satellite imagery reveals fog formation across the North Bay valleys and the SF Bay and adjacent shorelines with high clouds over the Pacific NW/NorCal that are associated with a strong parent low pressure system over the Gulf of Alaska. Weak flow at the lower levels under influence of high pressure, clear skies, and a relatively moist boundary layer have resulted in ideal conditions for dense fog formation across the Bay Area.
Current observations show visibilities at a quarter statute miles or less across the NB valleys. Fog is spreading south over the SF Bay with Oakland airport reporting 3/4 statute miles. Fog is expected to continue to spread and drift south affecting more of the bay shoreline as well as the Santa Clara Valley later in the morning hours.
Dense fog will result in dangerous driving conditions, especially for the morning commute. Be sure to use caution, use your low beams, and give yourself plenty of distance from other vehicles.
Since we are in winter and the sun angle is lower (ie less incoming solar radiation to penetrate the fog), dense fog may linger longer through the morning, which is supported by hi resolution guidance. As such, Dense Fog Advisories for the NB valleys, the SF Bay shoreline, the Santa Clara Valley, and the SF Peninsula coastline are set to expire at 11 AM this morning.
Once the fog dissipates by late morning and visibilities improve, it's expected to be a rather pleasant day across the region with warmer than average temperatures. Highs will be in the upper 60s to mid 70s, running about 10 degrees above climatological normals for much of the region.
If planning to go to the beach, be sure to use caution still as the surf zone remains active and turbulent with large northwest swells moving through the coastal CA waters. See BEACHES section below for more detailed info.
LONG TERM
(Wednesday through Monday)
Issued at 155 AM PST Tue Dec 5 2023
A weaker perturbation (and associated cold front) off the aforementioned parent low will dip into the Bay Area late Tuesday into early Wed, bringing our next round of rain. Rain is expected starting early Wednesday across the North Bay, spreading south and east through the early afternoon. The NBM has trended slightly wetter with forecasted rainfall amounts with the North Bay expected to receive about 1/3 inch up to 3/4 inch in the valleys, while south of the Golden Gate and the East Bay will generally see 0.25 to up to a half an inch. The further south and inland you go towards the Central Coast, less rain is expected (<0.10" generally). The ensemble GFS shows more spread for precip totals among ensemble members. For example, KSTS airport 24 hour totals from Wed-Thurs range from 0.1" to 0.8", but the majority of members are somewhere between 0.3" to 0.5". NBM features a 80% chance for KSTS to see more than 0.5" on Wed. So, there's still some uncertainty with how much rain we'll get, but the overall message is that this next round of rain will be beneficial rain with no real flooding concerns. Main rain event will be over by Wed evening, but lingering light shower activity is possible into Thursday.
In wake of the exiting upper trough, a colder airmass will funnel into the region at the end of the week. Colder overnight lows become the next concern with Friday and Saturday mornings looking to be the coldest mornings with temperatures dipping into the 30s across the interior, which may result in frost/freeze conditions. WPC cluster analysis in good agreement that upper level ridging will build in late this week into the weekend, which will favor clear skies that could enhance overnight radiational cooling and subsequent frost formation.
Looking further ahead, long range models hint that mid December may be wetter (still lots of uncertainty though). CPC 8-14 day outlook is starting to hint at slightly above average precip across CA.
AVIATION
(12Z TAFS)
Issued at 335 AM PST Tue Dec 5 2023
LIFR-IFR stratus and fog have formed across the North Bay valleys and in patches around the SF Bay. Highest confidence for continuing impacts at STS, with patchy conditions reducing confidence elsewhere across the region. With stratus evident in the SF Bay itself, have opted to retain low visibilities and ceilings for the SF Bay terminals, albeit with lower confidence for formation times. Fog development in the Santa Clara Valley is later than had been anticipated. Considered removing fog from the SJC TAF, but opted against it.
Stratus will lift through the morning and clear out in the early afternoon. Light winds in a generally onshore pattern will dominate, and stratus will build again across the coastal and Bayshore regions in the evening hours, including in the Monterey Bay region.
Vicinity of SFO... IFR-LIFR stratus at or very close to the terminal through the morning. Light winds continue through the TAF period, with a gentle west-northwest flow setting up in the afternoon.
Stratus is expected to return later in the evening, with showers possible early Wednesday morning.
SFO Bridge Approach... Stratus is currently impacting the entire approach path and is expected to persist until the early afternoon.
Otherwise similar to SFO.
Monterey Bay Terminals... VFR through the night with light drainage winds, turning to light onshore winds in the afternoon. Stratus builds back into the area this evening.
MARINE
(Today through Sunday)
Issued at 335 AM PST Tue Dec 5 2023
Light winds continuing across the waters, except near Point Sur where breezy northerly winds persist until later this morning.
Another round of dense fog continues over the San Francisco Bay, San Pablo Bay, and the Delta and will diminish towards the early afternoon. Elevated seas between 12-17 feet will persist for much of the week as a series of long period northwest swells propagate through the waters, resulting in hazardous conditions for small craft operators. Chances of rain over the waters will begin tonight through the end of the work week.
BEACHES
Issued at 335 AM PST Tue Dec 5 2023
Northwest swell of 9 to 11 feet at 15 to 17 seconds is currently propagating through the coastal waters, resulting large breaking waves and lingering hazardous beach conditions. Current Beach Hazards statement in effect has been extended through 7 PM this evening to account for lingering hazardous conditions from the current swell and the arrival of a new northwest swell later this afternoon. Latest local NWPS run has this swell coming in a little quicker than previous model runs, arriving by the afternoon into the evening today. This upcoming northwest swell is expected to be larger, building to up to 12-14 feet at 17 to 19 seconds by late tonight into Wed. Large waves will peak Wednesday morning with breaking waves of 18 to 22 feet expected. As such, a High Surf Advisory has been issued from 7 PM this evening through late Wednesday night. A Beach Hazards Statement was also issued for the same timeframe for N Monterey Bay (ie Santa Cruz), which will still see larger waves but will be more protected from NW swell. Be sure to use extra caution if going to the beach, as these large waves will be capable of sweeping people into the water. Avoid rocks and jetties. Avoid steep beaches. Stay much farther back from the water and never turn your back on the ocean.
MTR WATCHES/WARNINGS/ADVISORIES
CA...Beach Hazards Statement through this evening for CAZ006-505-509- 530.
Dense Fog Advisory until 11 AM PST this morning for CAZ006-505- 506-508>510-513.
High Surf Advisory from 7 PM this evening to 4 AM PST Thursday for CAZ006-505-509-530.
Beach Hazards Statement from this evening through late Wednesday night for CAZ529.
PZ...Dense Fog Advisory until 11 AM PST this morning for SF Bay N of Bay Bridge.
Small Craft Advisory from 3 AM to 9 PM PST Wednesday for Mry Bay.
Small Craft Advisory until 9 PM PST Wednesday for Pigeon Pt to Pt Pinos 0-10 nm-Pigeon Pt to Pt Pinos 10-60 NM-Pt Arena to Pt Reyes 0-10 nm-Pt Arena to Pt Reyes 10-60 NM-Pt Pinos to Pt Piedras Blancas 0-10 nm-Pt Reyes to Pigeon Pt 0-10 nm.
Area Forecast Discussion National Weather Service San Francisco CA 340 AM PST Tue Dec 5 2023
New AVIATION, MARINE, BEACHES
SYNOPSIS
Issued at 155 AM PST Tue Dec 5 2023
Dense fog is being reported across the North Bay interior valleys and SF Bay. Fog is expected to spread south and will impact more of the bay shoreline and Santa Clara valley by sunrise, thus Dense Fog Advisories are in effect until 11 AM. Nice and warm conditions are expected by the afternoon today. Rain is on track to arrive early Wednesday morning, bringing beneficial rain to the region. Cold morning temperatures expected at the end of the week.
SHORT TERM
(Today and tonight)
Issued at 155 AM PST Tue Dec 5 2023
Night fog GOES satellite imagery reveals fog formation across the North Bay valleys and the SF Bay and adjacent shorelines with high clouds over the Pacific NW/NorCal that are associated with a strong parent low pressure system over the Gulf of Alaska. Weak flow at the lower levels under influence of high pressure, clear skies, and a relatively moist boundary layer have resulted in ideal conditions for dense fog formation across the Bay Area.
Current observations show visibilities at a quarter statute miles or less across the NB valleys. Fog is spreading south over the SF Bay with Oakland airport reporting 3/4 statute miles. Fog is expected to continue to spread and drift south affecting more of the bay shoreline as well as the Santa Clara Valley later in the morning hours.
Dense fog will result in dangerous driving conditions, especially for the morning commute. Be sure to use caution, use your low beams, and give yourself plenty of distance from other vehicles.
Since we are in winter and the sun angle is lower (ie less incoming solar radiation to penetrate the fog), dense fog may linger longer through the morning, which is supported by hi resolution guidance. As such, Dense Fog Advisories for the NB valleys, the SF Bay shoreline, the Santa Clara Valley, and the SF Peninsula coastline are set to expire at 11 AM this morning.
Once the fog dissipates by late morning and visibilities improve, it's expected to be a rather pleasant day across the region with warmer than average temperatures. Highs will be in the upper 60s to mid 70s, running about 10 degrees above climatological normals for much of the region.
If planning to go to the beach, be sure to use caution still as the surf zone remains active and turbulent with large northwest swells moving through the coastal CA waters. See BEACHES section below for more detailed info.
LONG TERM
(Wednesday through Monday)
Issued at 155 AM PST Tue Dec 5 2023
A weaker perturbation (and associated cold front) off the aforementioned parent low will dip into the Bay Area late Tuesday into early Wed, bringing our next round of rain. Rain is expected starting early Wednesday across the North Bay, spreading south and east through the early afternoon. The NBM has trended slightly wetter with forecasted rainfall amounts with the North Bay expected to receive about 1/3 inch up to 3/4 inch in the valleys, while south of the Golden Gate and the East Bay will generally see 0.25 to up to a half an inch. The further south and inland you go towards the Central Coast, less rain is expected (<0.10" generally). The ensemble GFS shows more spread for precip totals among ensemble members. For example, KSTS airport 24 hour totals from Wed-Thurs range from 0.1" to 0.8", but the majority of members are somewhere between 0.3" to 0.5". NBM features a 80% chance for KSTS to see more than 0.5" on Wed. So, there's still some uncertainty with how much rain we'll get, but the overall message is that this next round of rain will be beneficial rain with no real flooding concerns. Main rain event will be over by Wed evening, but lingering light shower activity is possible into Thursday.
In wake of the exiting upper trough, a colder airmass will funnel into the region at the end of the week. Colder overnight lows become the next concern with Friday and Saturday mornings looking to be the coldest mornings with temperatures dipping into the 30s across the interior, which may result in frost/freeze conditions. WPC cluster analysis in good agreement that upper level ridging will build in late this week into the weekend, which will favor clear skies that could enhance overnight radiational cooling and subsequent frost formation.
Looking further ahead, long range models hint that mid December may be wetter (still lots of uncertainty though). CPC 8-14 day outlook is starting to hint at slightly above average precip across CA.
AVIATION
(12Z TAFS)
Issued at 335 AM PST Tue Dec 5 2023
LIFR-IFR stratus and fog have formed across the North Bay valleys and in patches around the SF Bay. Highest confidence for continuing impacts at STS, with patchy conditions reducing confidence elsewhere across the region. With stratus evident in the SF Bay itself, have opted to retain low visibilities and ceilings for the SF Bay terminals, albeit with lower confidence for formation times. Fog development in the Santa Clara Valley is later than had been anticipated. Considered removing fog from the SJC TAF, but opted against it.
Stratus will lift through the morning and clear out in the early afternoon. Light winds in a generally onshore pattern will dominate, and stratus will build again across the coastal and Bayshore regions in the evening hours, including in the Monterey Bay region.
Vicinity of SFO... IFR-LIFR stratus at or very close to the terminal through the morning. Light winds continue through the TAF period, with a gentle west-northwest flow setting up in the afternoon.
Stratus is expected to return later in the evening, with showers possible early Wednesday morning.
SFO Bridge Approach... Stratus is currently impacting the entire approach path and is expected to persist until the early afternoon.
Otherwise similar to SFO.
Monterey Bay Terminals... VFR through the night with light drainage winds, turning to light onshore winds in the afternoon. Stratus builds back into the area this evening.
MARINE
(Today through Sunday)
Issued at 335 AM PST Tue Dec 5 2023
Light winds continuing across the waters, except near Point Sur where breezy northerly winds persist until later this morning.
Another round of dense fog continues over the San Francisco Bay, San Pablo Bay, and the Delta and will diminish towards the early afternoon. Elevated seas between 12-17 feet will persist for much of the week as a series of long period northwest swells propagate through the waters, resulting in hazardous conditions for small craft operators. Chances of rain over the waters will begin tonight through the end of the work week.
BEACHES
Issued at 335 AM PST Tue Dec 5 2023
Northwest swell of 9 to 11 feet at 15 to 17 seconds is currently propagating through the coastal waters, resulting large breaking waves and lingering hazardous beach conditions. Current Beach Hazards statement in effect has been extended through 7 PM this evening to account for lingering hazardous conditions from the current swell and the arrival of a new northwest swell later this afternoon. Latest local NWPS run has this swell coming in a little quicker than previous model runs, arriving by the afternoon into the evening today. This upcoming northwest swell is expected to be larger, building to up to 12-14 feet at 17 to 19 seconds by late tonight into Wed. Large waves will peak Wednesday morning with breaking waves of 18 to 22 feet expected. As such, a High Surf Advisory has been issued from 7 PM this evening through late Wednesday night. A Beach Hazards Statement was also issued for the same timeframe for N Monterey Bay (ie Santa Cruz), which will still see larger waves but will be more protected from NW swell. Be sure to use extra caution if going to the beach, as these large waves will be capable of sweeping people into the water. Avoid rocks and jetties. Avoid steep beaches. Stay much farther back from the water and never turn your back on the ocean.
MTR WATCHES/WARNINGS/ADVISORIES
CA...Beach Hazards Statement through this evening for CAZ006-505-509- 530.
Dense Fog Advisory until 11 AM PST this morning for CAZ006-505- 506-508>510-513.
High Surf Advisory from 7 PM this evening to 4 AM PST Thursday for CAZ006-505-509-530.
Beach Hazards Statement from this evening through late Wednesday night for CAZ529.
PZ...Dense Fog Advisory until 11 AM PST this morning for SF Bay N of Bay Bridge.
Small Craft Advisory from 3 AM to 9 PM PST Wednesday for Mry Bay.
Small Craft Advisory until 9 PM PST Wednesday for Pigeon Pt to Pt Pinos 0-10 nm-Pigeon Pt to Pt Pinos 10-60 NM-Pt Arena to Pt Reyes 0-10 nm-Pt Arena to Pt Reyes 10-60 NM-Pt Pinos to Pt Piedras Blancas 0-10 nm-Pt Reyes to Pigeon Pt 0-10 nm.
toggle option: (graph/table)
Airport Reports
EDIT (on/off) Help Click EDIT to display multiple airports. Follow links for more data.| Airport | Dist | Age | Wind kt | Vis | Sky | Weather | Temp | DewPt | RH | inHg |
| KCCR BUCHANAN FIELD,CA | 1 sm | 24 min | calm | M1/4 sm | -- | Fog | 48°F | 46°F | 93% | 30.22 |
| KAPC NAPA COUNTY,CA | 19 sm | 15 min | NNW 03 | M1/4 sm | -- | Fog | 45°F | 45°F | 100% | 30.22 |
| KOAK METROPOLITAN OAKLAND INTL,CA | 20 sm | 46 min | calm | 1/8 sm | -- | Fog | 50°F | 50°F | 100% | 30.22 |
| KSUU TRAVIS AFB,CA | 21 sm | 44 min | NNW 04 | 1/8 sm | -- | Fog | 45°F | 43°F | 93% | 30.21 |
| KHWD HAYWARD EXECUTIVE,CA | 22 sm | 15 min | calm | 7 sm | Clear | 48°F | 46°F | 93% | 30.20 | |
| KLVK LIVERMORE MUNI,CA | 24 sm | 46 min | calm | 10 sm | Clear | 45°F | 41°F | 87% | 30.21 |
Wind History from CCR
(wind in knots)Benicia
Click for Map
Tue -- 01:20 AM PST 0.15 feet Low Tide
Tue -- 07:09 AM PST Sunrise
Tue -- 08:31 AM PST 4.21 feet High Tide
Tue -- 12:59 PM PST Moonset
Tue -- 02:11 PM PST 1.67 feet Low Tide
Tue -- 04:48 PM PST Sunset
Tue -- 07:40 PM PST 3.32 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Tue -- 01:20 AM PST 0.15 feet Low Tide
Tue -- 07:09 AM PST Sunrise
Tue -- 08:31 AM PST 4.21 feet High Tide
Tue -- 12:59 PM PST Moonset
Tue -- 02:11 PM PST 1.67 feet Low Tide
Tue -- 04:48 PM PST Sunset
Tue -- 07:40 PM PST 3.32 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Benicia, Carquinez Strait, California, Tide feet
| 12 am |
| 0.4 |
| 1 am |
| 0.2 |
| 2 am |
| 0.2 |
| 3 am |
| 0.7 |
| 4 am |
| 1.4 |
| 5 am |
| 2.3 |
| 6 am |
| 3.1 |
| 7 am |
| 3.7 |
| 8 am |
| 4.2 |
| 9 am |
| 4.2 |
| 10 am |
| 3.7 |
| 11 am |
| 3.1 |
| 12 pm |
| 2.4 |
| 1 pm |
| 1.9 |
| 2 pm |
| 1.7 |
| 3 pm |
| 1.8 |
| 4 pm |
| 2.2 |
| 5 pm |
| 2.6 |
| 6 pm |
| 3 |
| 7 pm |
| 3.3 |
| 8 pm |
| 3.3 |
| 9 pm |
| 3 |
| 10 pm |
| 2.4 |
| 11 pm |
| 1.7 |
Roe Island S
Click for Map
Tue -- 12:04 AM PST -1.94 knots Max Ebb
Tue -- 04:10 AM PST 0.00 knots Slack
Tue -- 07:09 AM PST Sunrise
Tue -- 07:25 AM PST 0.86 knots Max Flood
Tue -- 10:43 AM PST -0.00 knots Slack
Tue -- 12:59 PM PST Moonset
Tue -- 01:45 PM PST -1.40 knots Max Ebb
Tue -- 04:48 PM PST Sunset
Tue -- 04:57 PM PST 0.00 knots Slack
Tue -- 07:11 PM PST 0.51 knots Max Flood
Tue -- 09:42 PM PST -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Tue -- 12:04 AM PST -1.94 knots Max Ebb
Tue -- 04:10 AM PST 0.00 knots Slack
Tue -- 07:09 AM PST Sunrise
Tue -- 07:25 AM PST 0.86 knots Max Flood
Tue -- 10:43 AM PST -0.00 knots Slack
Tue -- 12:59 PM PST Moonset
Tue -- 01:45 PM PST -1.40 knots Max Ebb
Tue -- 04:48 PM PST Sunset
Tue -- 04:57 PM PST 0.00 knots Slack
Tue -- 07:11 PM PST 0.51 knots Max Flood
Tue -- 09:42 PM PST -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Roe Island S, Suisun Bay, California Current, knots
| 12 am |
| -1.9 |
| 1 am |
| -1.8 |
| 2 am |
| -1.5 |
| 3 am |
| -0.9 |
| 4 am |
| -0.1 |
| 5 am |
| 0.4 |
| 6 am |
| 0.7 |
| 7 am |
| 0.8 |
| 8 am |
| 0.8 |
| 9 am |
| 0.6 |
| 10 am |
| 0.3 |
| 11 am |
| -0.2 |
| 12 pm |
| -0.9 |
| 1 pm |
| -1.3 |
| 2 pm |
| -1.4 |
| 3 pm |
| -1.2 |
| 4 pm |
| -0.6 |
| 5 pm |
| 0 |
| 6 pm |
| 0.4 |
| 7 pm |
| 0.5 |
| 8 pm |
| 0.5 |
| 9 pm |
| 0.2 |
| 10 pm |
| -0.2 |
| 11 pm |
| -1 |
Sacramento, CA,
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