Sunrise 6:02 AM   Sunset 8:09 PM Moonrise 5:55 AM   Moonset 9:35 PM

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PZZ530 San Pablo Bay, Suisun Bay, The West Delta And The San Francisco Bay North Of The Bay Bridge- 227 Pm Pdt Thu May 9 2024
Today - NE winds 15 to 20 knots - .diminishing to 10 to 15 knots this afternoon. Gusts up to 30 knots. Tonight - SW winds 10 to 15 knots with gusts up to 25 knots. Fri - SW winds 10 to 15 knots with gusts up to 25 knots. Fri night - SW winds 10 to 15 knots with gusts up to 25 knots. Sat - SW winds 10 to 15 knots with gusts up to 25 knots. Sat night - SW winds 10 to 15 knots with gusts up to 25 knots. Sun - SW winds 10 to 15 knots with gusts up to 25 knots. Mon - SW winds 5 to 10 knots.

PZZ500 227 Pm Pdt Thu May 9 2024
Synopsis for the central california coast and bays including the Monterey bay - Greater farallones - .and cordell bank national marine sanctuaries - .
light to moderate winds continue over the waters from the high pressure that sits in the north, but winds will become more southerly along the big sur and Monterey bay region this evening. Otherwise, gentle breezes out of the north and northwest continue through the weekend first portion of the weekend. Dry weather continues through the forecast period as high pressure dominates.

FXUS66 KMTR 092008 AFDMTR

Area Forecast Discussion National Weather Service San Francisco CA 108 PM PDT Thu May 9 2024

New SYNOPSIS, SHORT TERM, LONG TERM

SYNOPSIS
Issued at 108 PM PDT Thu May 9 2024

Temperatures peak today along the coast with a incoming southerly surge cooling the coastal regions on Friday. Interior regions see temperatures peak on Friday, before a slight cooldown begins over the weekend. Coastal regions cool to around the seasonal average temperatures by early next week.

SHORT TERM
(This evening through Friday)
Issued at 108 PM PDT Thu May 9 2024

The peak of the heat event has started with highs today ranging from the low to mid 70s at the coastal regions, to the low to mid 80s at the Bayshore and near Santa Cruz, to the upper 80s across the interior valleys. The interaction between a strong ridge building into British Columbia and the Pacific Northwest with a weak cut-off low in the Great Basin is creating offshore flow across the region, but this pattern is also one that will tend to create a "southerly surge" of coastally trapped winds. Indeed, the high resolution HRRR is showing a southerly surge coming up the Central Coast today, abating overnight before a second surge travels farther north across the California coast, beyond the Golden Gate and Point Arena. Those two southerly surges will bring some relief to the coastal Central Coast later today, and to the coastal regions tomorrow, with Friday's coastal highs expected to hover around the upper 60s to lower 70s. The surges will also provide the only substantial chances for cloud cover near the coastal areas impacted. That is little comfort to those inland, where high temperatures will continue to rise on Friday with the warmest spots bumping into the lower 90s.
Even the City, which does see some relief from the approaching southerly surge, is expected to top out in the upper 70s tomorrow.

The region will generally see a Minor HeatRisk today and Friday, with a Moderate HeatRisk for the interior regions of the North Bay, East Bay, and South Bay. This corresponds to a low to moderate risk of heat-related illnesses for vulnerable populations (children, the elderly, pregnant women, people without adequate cooling, and people with certain medical conditions). Here's a reminder of some heat safety tips:

* Stay hydrated and drink plenty of fluids.
* Wear lightweight, light-colored clothing.
* Reduce time spent outdoors or stay in the shade.
* Never leave people or pets unattended in vehicles.
* Use sunscreen if going to the coast or the pool.

LONG TERM
(Friday night through next Wednesday)
Issued at 108 PM PDT Thu May 9 2024

As the upper level ridge weakens as it moves through the Pacific Northwest over the weekend, onshore flow will begin to reassert itself. Coastal regions will continue to cool down and reach seasonal average highs of around the upper 50s to lower 60s by the early part of next week. The interior will continue to remain warmer than seasonal averages, but not as warm as the forecast for Friday, with highs generally in the low to mid 80s by the early part of next week. Ensemble model clusters are in agreement over a new ridge expected to approach the Pacific Northwest by Tuesday, but its evolution after that point remains unclear.

AVIATION
(18Z TAFS)
Issued at 1038 AM PDT Thu May 9 2024

VFR thanks to offshore flow. Winds are still breezy to gusty at times, but less than yesterday. LLWS is less with stronger sfc winds and decreasing winds aloft - better mixing. Hi-res models show a southerly surge developing tonight with S winds already developing along the Central Coast. Low cig impacts tonight look to be mainly confined to MRY Bay region.

Vicinity of SFO...VFR through the period. Breezy to gusty NE flow persisting through this afternoon before switching onshore late.
Low clouds associated with S surge remain outside of Golden Gate through tonight.

SFO Bridge Approach...similar to SFO.

Monterey Bay Terminals...VFR through early tonight. Included some cigs for KSNS early Friday due to low cigs sneaking up the Central Coast. Ensemble guidance shows a 60-70% chc for low cigs at KSNS.
KMRY on the other hand are much lower at 15-20% and will only do SCT cigs.

MARINE
(Today through Tuesday)
Issued at 958 AM PDT Thu May 9 2024

High pressure to the north will maintain light to moderately northerly winds for most of the coastal waters today. However, winds will be locally more southerly along the Big Sur and Monterey Bay region. Otherwise, gentle breezes out of the north and northwest continue through the weekend first portion of the weekend. Dry weather continues through the forecast period as high pressure dominates.

MTR WATCHES/WARNINGS/ADVISORIES
CA...None.
PZ...Small Craft Advisory until 3 PM PDT this afternoon for Pt Pinos to Pt Piedras Blancas 0-10 nm.

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San Francisco
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Thu -- 12:15 AM PDT     6.52 feet High Tide
Thu -- 06:04 AM PDT     Sunrise
Thu -- 06:55 AM PDT     Moonrise
Thu -- 07:07 AM PDT     -1.61 feet Low Tide
Thu -- 02:24 PM PDT     4.67 feet High Tide
Thu -- 06:49 PM PDT     2.56 feet Low Tide
Thu -- 08:08 PM PDT     Sunset
Thu -- 10:34 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION

San Francisco, California, Tide feet

Golden Gate Bridge .8 mi E .
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Thu -- 01:55 AM PDT     -0.00 knots Slack
Thu -- 05:37 AM PDT     -4.01 knots Max Ebb
Thu -- 06:04 AM PDT     Sunrise
Thu -- 06:55 AM PDT     Moonrise
Thu -- 09:17 AM PDT     0.01 knots Slack
Thu -- 12:21 PM PDT     3.97 knots Max Flood
Thu -- 03:48 PM PDT     -0.01 knots Slack
Thu -- 06:16 PM PDT     -1.70 knots Max Ebb
Thu -- 08:08 PM PDT     Sunset
Thu -- 09:05 PM PDT     0.00 knots Slack
Thu -- 10:34 PM PDT     Moonset
Thu -- 11:55 PM PDT     2.52 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION

Golden Gate Bridge .8 mi E ., San Francisco Bay, California Current, knots

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