Wednesday, March3, 2021
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Marine Weather and Tides
El Granada, CA

Version 3.4
NOTICE
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 6:36AMSunset 6:07PM Wednesday March 3, 2021 2:58 AM PST (10:58 UTC) Moonrise 11:29PMMoonset 9:26AM Illumination 77% Phase: Waning Gibbous; Moon at 19 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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7 Day Forecast for Marine Location Near El Granada, CA
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location: 37.5, -122.48     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 030547 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 947 PM PST Tue Mar 2 2021

SYNOPSIS. Cloudy skies overnight will keep temperatures fairly mild. Dry weather continues Wednesday as a low passes over far Southern California with dry conditions into Friday. A cold front arrives Friday night into early Saturday with a chance of light rain. Drying but cool Saturday afternoon into Sunday. Long range for next week looks cool and showery with a trough along the West Coast.

DISCUSSION. as of 9:25 PM PST Tuesday . No forecast updates planned for this evening. Plenty of mid and high clouds over the region in association with the weak low well west of Point Conception. Those clouds will keep overnight lows from getting too cold with mainly 40s except some 30s in the North Bay where clouds are thinner with more breaks. That low will move onshore near San Diego on Weds keeping any precip well to our south. The impact around here will be cool onshore breezes and mostly cloudy skies early in the day with increasing sunshine by afternoon. With our cool SST the onshore winds will keep the beaches cool with 60s inland.

That low will eject towards the Four-Corners region on Thursday as high pressure briefly noses over Norcal keeping the weather dry and seasonal.

Friday remains dry but with increasing southerly winds and clouds ahead of a well defined cold front and upper trough. NCEP reports that 32 drop sondes were successfully dropped into the source region of this moisture plume as part of the Atmospheric River Recon project. This gives added confidence in some of the model solutions and consistency we are starting to see. The moisture plume on the GFS is progged to be around 0.50-0.75 TPW by Friday evening, not overly impressive. This is consistent then with low forecast rainfall amounts of generally 0.50-0.75 coastal hills and quarter inch lower elevations with 0.10 for the interior valleys. Timing is looking like Friday evening for the North Bay then rapidly spreading southward overnight into early Saturday morning with nearly all showers ending by 15-18z Saturday. That will leave a cool but mainly dry weekend for Saturday afternoon into Sunday.

Light rain could return as early as Sunday night but more likely into Monday/Tuesday. Trends for next week look positive in terms of rainfall chances. Not seeing any signs of overly wet systems with AR taps. In contrast it looks to be a cold trough off the coast with periods of showers through the week. Rains will be beneficial and could add up to a few inches if things pan out. As we get into March will have to be looking for t-storm potential with small hail events as 700 mb temps will plummet to -10 to -14 c for much of next week. So no drought busters but some hope for some beneficial rains next week.

Latest long range trends show that trough ejecting by around March 11-12th with a brief ridge followed by potentially another cold trough as the PNA is progged to remain negative by the latest gfs and ecmwf weeklies through much of March.

AVIATION. as of 9:46 PM PST Tuesday . For the 06Z TAFs. High clouds obscure the satellite view of the Bay Area and the Central Coast; but no low clouds are being observed my ground instruments and none are expected overnight. Winds will be light, but as a surface trough approaches on Wednesday, winds will shift to the WSW. Winds will diminish after 00Z, but models are still hinting at the possibility of some low clouds increasing. Given the high clouds expected and the southerly wind component, only FEW to SCT was added to the end of the TAFs, but will be monitored as new model data comes in and VFR otherwise. Vicinity of KSFO . VFR through the TAF period, despite high clouds overhead. Winds over producing what models indicated by remaining breezy at this hour, but are still expected to diminish overnight. Winds will increase Wednesday out of the WSW. Models are still hinting at a few lower clouds moving into the but there remains low confidence in impacts to the terminal. Winds become variable Wednesday night. SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . Winds are diminishing, but a few moderate breezes still funneling through the Salinas Valley, expecting to subside tonight. High clouds aloft keep VFR through the morning. As winds increase Wednesday afternoon, models are showing NW farther inland, but a more southerly component for terminals closer to the coast as the next surface boundary approaches. FEW/SCT low-to-mid level clouds after 00Z, with a chance for brief BKN, but low confidence in it so it was left out the TAF.

MARINE. as of 08:47 PM PST Tuesday . Light to locally moderate breezy northwest winds continue this evening and overnight. Slightly breezier conditions are expected Wednesday afternoon as a low pressure system passes to the south. Moderate northwest swell is bringing hazardous seas conditions for smaller vessels over the outer waters into the morning. Winds will increase and turn southerly on Thursday ahead of the next frontal system set to arrive Friday into Saturday. Moderate northwest swell persists through Thursday, when a longer period northwest swell arrives.

MTR WATCHES/WARNINGS/ADVISORIES. Tngt. SCA . Pt Arena to Pigeon Pt 10-60 nm SCA . Pigeon Pt to Pt Piedras Blancas 10-60 nm



PUBLIC FORECAST: RWW AVIATION: DK MARINE: Lorber

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Weather Reporting Stations
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Wind History for Redwood City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Half Moon Bay Airport, CA1 mi64 minNW 37.00 mi43°F37°F81%1008.8 hPa
San Francisco, San Francisco International Airport, CA10 mi63 minN 010.00 miOvercast54°F39°F57%1008.5 hPa
San Carlos Airport, CA12 mi64 minN 010.00 miA Few Clouds50°F41°F71%1008.8 hPa
Oakland, Metro Oakland International Airport, CA20 mi66 minE 310.00 miOvercast51°F42°F71%1008.8 hPa
Hayward, Hayward Air Terminal, CA22 mi65 minN 010.00 miFair50°F39°F66%1009.5 hPa
Mountain View, Moffett Field, CA23 mi64 minN 010.00 miFair50°F41°F71%1008.5 hPa

Link to 5 minute data for KHAF

Wind History from HAF (wind in knots)
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Last 24hrCalmNE4NE4CalmCalmCalmS5S4SW7SW4SW5W6NW7N6N3N4N3CalmE3CalmNW4CalmCalmCalm
1 day agoCalmCalmE3NE3CalmS5S6S8SE7SE8S6SE7S6S11
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2 days agoNW9NW8NW8N4NW4NW7N8NE10
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Tide / Current Tables for Half Moon Bay, California
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Half Moon Bay
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Wed -- 01:09 AM PST     5.71 feet High Tide
Wed -- 06:37 AM PST     Sunrise
Wed -- 07:36 AM PST     0.53 feet Low Tide
Wed -- 09:25 AM PST     Moonset
Wed -- 01:50 PM PST     4.37 feet High Tide
Wed -- 06:06 PM PST     Sunset
Wed -- 07:28 PM PST     1.60 feet Low Tide
Wed -- 11:29 PM PST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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5.35.75.54.83.62.31.20.60.61.11.92.83.64.24.44.13.52.721.61.72.234

Tide / Current Tables for San Mateo Bridge, South San Francisco Bay, California Current
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San Mateo Bridge
Click for Map
Wed -- 12:40 AM PST     1.60 knots Max Flood
Wed -- 03:59 AM PST     -0.00 knots Slack
Wed -- 06:37 AM PST     Sunrise
Wed -- 07:25 AM PST     -1.69 knots Max Ebb
Wed -- 09:24 AM PST     Moonset
Wed -- 10:38 AM PST     0.01 knots Slack
Wed -- 01:23 PM PST     1.58 knots Max Flood
Wed -- 04:58 PM PST     -0.01 knots Slack
Wed -- 06:05 PM PST     Sunset
Wed -- 07:52 PM PST     -1.16 knots Max Ebb
Wed -- 10:37 PM PST     0.00 knots Slack
Wed -- 11:28 PM PST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.51.61.30.7-0-0.7-1.3-1.7-1.6-1.1-0.40.31.11.51.51.20.7-0-0.6-1-1.2-0.9-0.30.2

Weather Map
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GEOS Local Image of CentralWestCoast    EDIT
NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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