Sunrise 6:27 AM   Sunset 7:48 PM Moonrise 2:07 PM   Moonset 3:18 AM

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PZZ545 Coastal Waters From Point Reyes To Pigeon Point California Out To 10 Nm- 819 Am Pdt Thu Apr 18 2024
Today - NW winds 5 to 10 knots. Wind waves 2 to 3 ft. Mixed swell nw 2 to 4 ft at 10 seconds and sw 2 to 3 ft at 16 seconds. Tonight - SW winds 5 to 10 knots. Wind waves 3 to 4 ft. Mixed swell nw 2 to 3 ft at 9 seconds and sw 2 to 3 ft at 16 seconds. Fri - SW winds 5 to 10 knots. Wind waves 3 to 4 ft. Mixed swell nw around 2 ft at 8 seconds and sw 2 to 3 ft at 15 seconds. A slight chance of drizzle. Fri night - W winds 5 to 10 knots. Wind waves 4 to 5 ft. SWell sw around 2 ft at 18 seconds. A slight chance of very light drizzle. Sat - NW winds 10 to 15 knots with gusts up to 25 knots. Wind waves 4 to 6 ft. W swell around 2 ft at 14 seconds and sw around 2 ft at 17 seconds. A slight chance of drizzle. Sat night - NW winds 15 to 25 knots with gusts up to 30 knots. Wind waves 6 to 8 ft. W swell around 2 ft at 13 seconds and sw around 2 ft at 16 seconds. Sun - NW winds 15 to 20 knots with gusts up to 25 knots. Wind waves 5 to 7 ft. W swell 2 to 4 ft and sw 2 to 3 ft. Mon - W winds 10 to 15 knots. Wind waves 4 to 5 ft. NW swell 4 to 6 ft and sw around 2 ft.
- .san francisco bar/fourfathom bank forecast - - .
in the deep water channel - .mixed seas of 3 to 5 ft at 17 seconds.
across the bar - .mixed seas of 4 to 6 ft at 17 seconds. Maximum ebb current of 1.6 kt at 01:52 pm Thursday and 2.0 kt at 02:45 am Friday.

PZZ500 819 Am Pdt Thu Apr 18 2024
Synopsis for the central california coast and bays including the Monterey bay - Greater farallones - .and cordell bank national marine sanctuaries - .
expect light to moderate winds into the weekend before breezy to gusty northerly winds arrive Saturday afternoon. Wave heights will start to build heading into the late weekend to early next week. Another moderate period northwest swell arrives over the weekend as well as another light, longer period (18 seconds) southerly swell.

FXUS66 KMTR 181735 AFDMTR

Area Forecast Discussion National Weather Service San Francisco CA 1035 AM PDT Thu Apr 18 2024

New AVIATION, MARINE

SYNOPSIS
Issued at 1206 PM PDT Wed Apr 17 2024

Warm temps persist into the weekend with a slight cool off Friday as a weak trough pushes through. Increased cloudiness late week with a chance of coastal drizzle. Otherwise seasonal going into next week.

SHORT TERM
(Today and tonight)
Issued at 1228 AM PDT Thu Apr 18 2024

The upper ridge now across the region will begin flattening today in response to a weak disturbance upstream. The only real change in our weather pattern as compared to yesterday will be slightly more robust onshore flow. Therefore coastal areas should be a few degrees cooler, while warm temperatures prevail inland. Look for highs ranging from the lower to mid 60s along the coast tho the upper 70s to around 80 in the warmer inland valleys. While most areas should see plentiful sunshine outside of some higher clouds there is some suggestion that low clouds and fog may develop around the Monterey Bay this morning with the possible development of an Otter Eddy.
Regardless, any lower clouds, should they develop, will mix out by mid to late morning.

LONG TERM
(Friday through Wednesday)
Issued at 1228 AM PDT Thu Apr 18 2024

A trough will progress through the region on Friday into early Saturday. This will bring increased cloud cover and breezy onshore flow which will result in cooler temperatures. Some patchy drizzle may also develop during the late night and morning hours for orographically favorable areas along the coast.

The ridge rebuilds a bit over the weekend with a slight warming trend. However onshore winds will keep things cooler by the coast.

By Wednesday the ridge will weaken as upstream troughing encroaches on the area. This trough has a bit more moisture to work with, and some ensemble members suggests that precipitation may return to part of the area by mid to late week. However confidence at this point is low so we'll await future updates to gain greater clarity in the details.

AVIATION
(18Z TAFS)
Issued at 1034 AM PDT Thu Apr 18 2024

VFR to continue through the evening with MVFR-IFR returning overnight for most stations. HRRR indicates stratus will return along the coast and move inland around 08-12Z with a slightly earlier return (03-06Z) along the Central Coast. Low to moderate confidence that fog will develop overnight at STS, SNS, and MRY with guidance indicating moderate potential for LIFR conditions at STS and SNS. For most stations, stratus looks to dissipate by mid-morning but at a few stations (STS, APC, SNS, MRY)
dissipation looks to occur by late morning shortly after this TAF period ends. Light to moderate SW to W winds will continue through the day with winds becoming light and variable overnight.

Vicinity of SFO...VFR with MVFR returning overnight. Stratus will return during the early morning with MVFR CIGs and only minor impacts to visibility anticipated. Low confidence that fog will develop at SFO but if lower CIGs do develop 12-16Z looks to be the best time frame. Stratus is expected to clear out by mid-morning between 17-18Z. Moderate W winds persist through the afternoon with light, variable winds returning overnight. Moderate W winds return by mid to late morning tomorrow.

SFO Bridge Approach...Similar to SFO.

Monterey Bay Terminals...VFR transitioning to MVFR-IFR overnight.
Guidance indicates MVFR and IFR CIGs will develop overnight with increasing potential for LIFR CIGs to develop, particularly at SNS.
Low to moderate confidence that fog will develop at SNS and MRY. If fog does develop, LIFR CIGs and significantly reduced visibilities are likely. Confidence is higher for fog development at SNS than MRY with guidance indicating high RH values and weak winds between 06- 16Z. Moderate W-NW winds during the day with light, variable winds returning overnight.

MARINE
(Today through Tuesday)
Issued at 1034 AM PDT Thu Apr 18 2024

Expect light to moderate winds into the weekend before breezy to gusty northerly winds arrive Saturday afternoon. Wave heights will start to build heading into the late weekend to early next week.
Another moderate period northwest swell arrives over the weekend as well as another light, longer period (18 seconds) southerly swell.

MTR WATCHES/WARNINGS/ADVISORIES
CA...None.
PZ...None.

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Smith Slough
Click for Map
Thu -- 04:18 AM PDT     Moonset
Thu -- 04:56 AM PDT     2.26 feet Low Tide
Thu -- 06:29 AM PDT     Sunrise
Thu -- 09:48 AM PDT     6.64 feet High Tide
Thu -- 03:05 PM PDT     Moonrise
Thu -- 05:04 PM PDT     0.48 feet Low Tide
Thu -- 07:47 PM PDT     Sunset
Thu -- 11:24 PM PDT     7.05 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION

Smith Slough, San Francisco Bay, California, Tide feet

San Mateo Bridge
Click for Map
Thu -- 02:44 AM PDT     -0.83 knots Max Ebb
Thu -- 04:18 AM PDT     Moonset
Thu -- 05:03 AM PDT     0.01 knots Slack
Thu -- 06:29 AM PDT     Sunrise
Thu -- 07:46 AM PDT     1.03 knots Max Flood
Thu -- 10:30 AM PDT     -0.01 knots Slack
Thu -- 02:17 PM PDT     -1.29 knots Max Ebb
Thu -- 03:05 PM PDT     Moonrise
Thu -- 05:23 PM PDT     0.00 knots Slack
Thu -- 07:47 PM PDT     Sunset
Thu -- 08:26 PM PDT     1.57 knots Max Flood
Thu -- 11:37 PM PDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION

San Mateo Bridge, South San Francisco Bay, California Current, knots

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