Marine Weather and Tide Forecast for Rutherford, CA

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7 Day Forecast for Marine Location Near Rutherford, CA

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Area Discussion for - San Francisco/Monterey Bay Area, CA

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FXUS66 KMTR 081715 AFDMTR

Area Forecast Discussion National Weather Service San Francisco CA 1015 AM PDT Thu Jun 8 2023

New AVIATION, MARINE

SYNOPSIS
Issued at 439 AM PDT Thu Jun 8 2023

Subtle warming trend into the weekend, though daytime highs will still be 2-10 degrees below normal. Another closed upper low is expected to develop early next week, bringing a very slight chance for rain and cooling temperatures back down to the 10-15 degrees below normal territory. Deep marine layer persists maintaining the daily cadence of low clouds pushing inland overnight then clearing by late morning.

SHORT TERM
(Today and tonight)
Issued at 439 AM PDT Thu Jun 8 2023

Satellite showing a continued mix of high and low clouds. However, the inland intrusion of marine stratus is not as extensive as we've seen in prior days. Our forecast area (SF & Monterey Bay regions) will be in a fairly benign weather pattern today as the upper low tracks into the Great Basin and weakens.

Current temperatures are within a degree or two of what they were 24 hours ago and we expect drier conditions today. Afternoon highs will begin a subtle warming trend this afternoon. Highs will range 60s along the coast to the upper 70s and low 80s well inland. Winds will be fairly light for much of the morning with typical breezy conditions developing across the Bays and into the valleys this afternoon and evening. Wind gusts could get up to around 20 mph.

If one were to travel outside of the Bay Area/Central CA, then take note that showers with potential thunderstorms are forecast to develop again over the Sierra as well as far NorCal.

LONG TERM
(Friday through Wednesday)
Issued at 439 AM PDT Thu Jun 8 2023

The upper low will weaken moreso over the weekend and transition into a broader trough pattern. As that occurs, the airmass aloft will warm as weak ridging aloft develops and this will aid in the gradual warming trend today into Saturday. This warming trend will be somewhat noticeable inland, however, thermometers along the coast should stay somewhat similar.

As we get into Saturday evening into Sunday, another trough digs southward over the Eastern Pacific Ocean. Then another upper level closed low is forecast to develop offshore of SoCal. Expect a gentle dip in temperatures on Sunday with that cooler air moving in. In addition, we could see additional light shower activity associated with that low. However, ensemble models have been very consistent that any rain amounts will be quite light (< 0.10") for early next week.

Is it abnormal to get rain in June? We've been hearing that question a lot recently. It may seem abnormal since CA has been in a multi-year drought prior to the winter full of Atmospheric Rivers we just had. However, it is common to get a bit of rain in June. Here's a few of our official climate sites and what the monthly precipitation normals are in June:

Santa Rosa: 0.29" Napa: 0.29" Livermore: 0.12" Downtown SF: 0.20" Oakland: 0.20" San Jose: 0.18"

AVIATION
(18Z TAFS)
Issued at 1014 AM PDT Thu Jun 8 2023

Widespread MVFR stratus covers the North Bay to the west of APC, with stratus flows causing occasional MVFR ceilings at APC, OAK, and SFO. Stratus coverage is expected to thin out by the afternoon and conditions should otherwise remain VFR today. Winds will be generally light to breezy at a maximum of 10-15 knots in an onshore pattern. Stratus is expected to build back into the region tonight.
Generally MVFR conditions are expected, with almost certain (over 90% probability) of IFR ceilings at MRY and low to moderate confidence (30-40% probability) in IFR conditions developing at the main Bay Area terminals. Northwesterly onshore flow will resume on Friday.

Vicinity of SFO...Generally VFR with patches of MVFR stratus through the morning. Winds will come from the west with gusts up to 20 knots this afternoon and evening. High confidence in MVFR stratus building after midnight. Low to moderate confidence (30-40% probability) in IFR conditions or perhaps fog at the terminal overnight. Clearing expected late Friday morning and winds will resume from the west Friday afternoon.

SFO Bridge Approach...Similar to SFO.

Monterey Bay Terminals...VFR through the day with west to northwest winds at 10-15 knots this afternoon. Stratus returns tonight with high confidence in IFR ceilings at MRY and MVFR ceilings at SNS. Low to moderate confidence (30-40% probability) of IFR at SNS, and in LIFR ceilings at MRY. At this time, chances of fog at MRY are very low at around 10%. Clearing expected at SNS around 17Z and at MRY a hour or two after the end of the TAF period.

MARINE
(Today through Tuesday)
Issued at 1014 AM PDT Thu Jun 8 2023

Light southerly winds persist over the waters and may become breezy in the afternoon and evening hours. Winds shifting to the northwest on Friday and building through the weekend. Mixed seas continue with a series of northwesterly and southerly swells through the waters.

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

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Weather Reporting Stations

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Wind History for Martinez-Amorco Pier, CA

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Airport Reports

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Link to 5 minute data for KO69

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Wind History from O69 (wind in knots)

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Tide / Current Tables for Napa, Napa River, Carquinez Strait, California

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