Friday, December13, 2019
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Marine Weather and Tides
El Granada, CA

Version 3.4
NOTICE
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 7:14AMSunset 4:53PM Friday December 13, 2019 2:08 PM PST (22:08 UTC) Moonrise 6:31PMMoonset 8:40AM Illumination 95% Phase: Waning Gibbous; Moon at 17 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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PZZ545 Coastal Waters From Point Reyes To Pigeon Point California Out To 10 Nm- 859 Am Pst Fri Dec 13 2019
.small craft advisory in effect through Saturday evening...
Today..SW winds around 5 kt, becoming S 10 to 20 kt this afternoon. Wind waves 1 ft, increasing to 3 to 4 ft this afternoon. W swell 11 to 13 ft at 18 seconds. Areas of dense fog this morning. A chance of rain this morning, then rain likely this afternoon.
Tonight..W winds 10 to 20 kt with gusts up to 25 kt. Wind waves 1 to 2 ft. W swell 10 to 12 ft at 17 seconds. Rain likely.
Sat..NW winds 10 to 20 kt with gusts up to 25 kt. Wind waves 1 to 2 ft. W swell 9 to 11 ft at 16 seconds.
Sat night..NW winds 10 to 20 kt with gusts up to 25 kt. Wind waves 3 to 4 ft. W swell 7 to 9 ft at 15 seconds. A chance of rain.
Sun..NW winds 10 to 15 kt. Wind waves 1 to 2 ft. W swell 7 to 9 ft at 14 seconds.
Sun night..NE winds 5 to 15 kt. Wind waves 1 to 2 ft. W swell 7 to 9 ft at 13 seconds.
Mon..NE winds 5 to 15 kt. Wind waves 1 to 2 ft. W swell 5 to 7 ft.
Tue..E winds 10 to 20 kt with gusts up to 25 kt. Wind waves 4 to 5 ft. W swell 4 to 6 ft. A chance of rain.
...san francisco bar/fourfathom bank forecast..... In the deep water channel...seas 9 to 11 ft with a dominant period of 15 seconds. Across the bar...seas 10 to 12 ft with a dominant period of 15 seconds. Maximum ebb current of 4.2 kt at 04:25 pm Friday and 1.2 kt at 05:49 am Saturday.
PZZ500 859 Am Pst Fri Dec 13 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Southerly winds will persist today ahead of a weak frontal boundary approaching the region. Rain will fall across the waters today with showers lingering through Saturday. Winds will switch to the northwest tonight and increase on Saturday as a cool upper level trough passes to the north of the area. Large long- period northwest swell will impact the waters through Saturday.


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 132143 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 143 PM PST Fri Dec 13 2019

SYNOPSIS. Chances of light rain will continue tonight and into this weekend as a disturbance moves across Northern California. Drier and colder conditions will prevail on Sunday, with frost possible Sunday night. An unsettled possibly wet pattern will likely to return by the middle of next week.

DISCUSSION. As of 1:43 PM PST Friday . Under cloudy skies, area temperatures are running cooler than yesterday at this time by several degrees, with readings ranging from the mid 50s to the lower 60s. Only light returns are being picked up by radar right now, but some brief showers moved through the Bay Area earlier today. Over the past three hours, only a few hundredths of an inch have been picked up. Areas of light rain or drizzle will occur overnight, and taper off by morning. Rainfall amounts are expected to be a quarter inch or less, with the bulk of that occurring in the coastal hills of the North Bay. A cold front will then move across the region late in the day on Saturday. Although this cold front will bring some light rain to the region, the biggest impact will be with the colder and drier air moving in behind the front. Although Sunday will be slightly cooler than Saturday, the main impact will be on the overnight temperatures Sunday night with frosty conditions will be possible as temperatures fall into the lower to mid 30s across the inland valleys.

Drier conditions are expected for early next week as high pressure builds along the coast. Although there are still inconsistencies amongst the model solutions, medium range models still indicate a return to a more unsettled pattern beginning the middle of next week with more well-defined storm systems moving through.

AVIATION. as of 10:31 AM PST Friday . Conditions remained mixed this morning with some of the terminals remaining in LIFR while low clouds and fog have cleared out of others with VFR conditions. Rain is moving across the North Bay and is expected to arrive at the Bay Area terminals as showers around 19z. Light rain will spread south through the day eventually impacting all terminals late this afternoon and evening. As the rain arrives, most locations still seeing LIFR conditions will improve to IFR or MVFR as lifting near a weak frontal boundary increases. Showers should diminish late this evening and overnight. Ample low-level moisture will remain for cigs to persist overnight potentially lowering to IFR. Some patchy fog is also possible across the North Bay tonight. Winds will be light and variable today, becoming predominantly northwest tonight.

Vicinity of KSFO . Conditions have improved with low clouds clearing and visibility increased to 4 SM. Light showers will begin to move over the terminal through the morning and into the afternoon. Clouds should lower as the rain arrives with MVFR conditions developing after 21-22z. Showers will decrease and end this evening. MVFR conditions overnight potentially lowering to IFR after 06z. Winds will be light and variable through the evening with an increase in west-northwest winds overnight into Saturday.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . Dense fog has ended with VFR at KMRY and IFR cigs persisting at KSNS. Conditions will become MVFR today as a weak front approaches. Light rain showers will develop late this afternoon and evening and clear out overnight. Cigs lowering to IFR overnight tonight. Winds will generally be light through the period.

MARINE. as of 8:59 AM PST Friday . Southerly winds will persist today ahead of a weak frontal boundary approaching the region. Rain will fall across the waters today with showers lingering through Saturday. Winds will switch to the northwest tonight and increase on Saturday as a cool upper level trough passes to the north of the area. Large long-period northwest swell will impact the waters through Saturday.

MTR WATCHES/WARNINGS/ADVISORIES. Tngt. High Surf Advisory . CAZ006-505-509-529-530 SCA . Pt Reyes to Pigeon Pt 0-10 nm SCA . Pigeon Pt to Pt Pinos 0-10 nm SCA . Pt Pinos to Pt Piedras Blancas 0-10 nm SCA . Pt Arena to Pt Reyes 0-10 nm SCA . Pt Arena to Pigeon Pt 10-60 nm SCA . Pigeon Pt to Pt Piedras Blancas 10-60 nm SCA . Mry Bay



PUBLIC FORECAST: Sims AVIATION: ST MARINE: ST

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RTYC1 - 9414523 - Redwood City, CA 14 mi56 min NNE 4.1 G 6 56°F 58°F1022.1 hPa
46237 - San Francisco Bar, CA (142) 21 mi38 min 55°F11 ft
AAMC1 - 9414750 - Alameda, CA 21 mi50 min 55°F
FTPC1 - 9414290 - San Francisco, CA 21 mi62 min SSE 6 G 8 56°F 55°F1020.7 hPa
PXSC1 21 mi50 min 56°F 56°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 21 mi50 min SE 13 G 17 54°F 1019.4 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 22 mi56 min SE 8 G 9.9
OBXC1 22 mi56 min 55°F 55°F
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 23 mi28 min SSE 7.8 G 14 55°F 57°F1021 hPa54°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 23 mi56 min SSE 7 G 9.9 56°F 1020.8 hPa
LNDC1 23 mi56 min SSE 6 G 7 55°F 1021 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 26 mi28 min SSE 14 G 18 55°F 56°F1020.7 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 27 mi69 min S 11 54°F 1021 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 29 mi50 min SE 8.9 G 12 57°F 1020.8 hPa
RCMC1 - 9414863 - Richmond, CA 29 mi50 min 55°F
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 40 mi50 min S 8 G 11 58°F 1019.7 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 41 mi56 min SSW 4.1 G 5.1 59°F 55°F1020.6 hPa
UPBC1 42 mi50 min SSW 7 G 11
PRYC1 - 9415020 - Point Reyes, CA 43 mi56 min 55°F1020.2 hPa
PCOC1 - 9415144 - Port Chicago, CA 45 mi50 min 54°F
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 49 mi56 min S 2.9 G 5.1 57°F 1020.6 hPa

Wind History for Redwood City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Half Moon Bay Airport, CA1 mi73 minS 52.50 miFog/Mist55°F53°F94%1022.3 hPa
San Francisco, San Francisco International Airport, CA10 mi72 minWSW 48.00 miMostly Cloudy59°F52°F78%1021.6 hPa
San Carlos Airport, CA12 mi81 minN 310.00 miOvercast57°F55°F94%1022.7 hPa
Palo Alto Airport, CA19 mi3.4 hrsNNW 63.00 miFog/Mist57°F55°F94%1024.4 hPa
Oakland, Metro Oakland International Airport, CA20 mi75 minS 310.00 miOvercast56°F52°F87%1022 hPa
Hayward, Hayward Air Terminal, CA22 mi74 minW 56.00 miFog/Mist57°F53°F87%1023 hPa

Link to 5 minute data for KSFO

Wind History from SFO (wind in knots)
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Last 24hrNE5E33E4N4N4NW5NW5W5NW6W5CalmCalmCalmCalmNW3CalmS3CalmNW3NW8W9W4SE9
1 day agoN3N3N4N4SE6E3SE3S5SE10SE7SE4CalmSW3SW3CalmCalmCalmNE5CalmE5CalmN5N6N8
2 days agoN4NE5CalmW13W83CalmE4NE4E6E5S4CalmE3E6SE7SE4SE5SE3CalmNE4N5N5N4

Tide / Current Tables for Princeton, Half Moon Bay, California
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for San Mateo Bridge, South San Francisco Bay, California Current
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San Mateo Bridge
Click for Map
Fri -- 02:38 AM PST     -0.00 knots Slack
Fri -- 05:06 AM PST     -0.89 knots Max Ebb
Fri -- 07:15 AM PST     Sunrise
Fri -- 07:34 AM PST     0.00 knots Slack
Fri -- 08:39 AM PST     Moonset
Fri -- 10:22 AM PST     1.25 knots Max Flood
Fri -- 01:19 PM PST     -0.00 knots Slack
Fri -- 04:51 PM PST     Sunset
Fri -- 05:14 PM PST     -2.05 knots Max Ebb
Fri -- 06:29 PM PST     Moonrise
Fri -- 08:39 PM PST     0.00 knots Slack
Fri -- 11:33 PM PST     1.90 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.71.20.5-0.2-0.7-0.9-0.7-0.30.20.81.21.20.80.2-0.4-1.1-1.7-2-1.9-1.3-0.50.31.31.8

Weather Map
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wmap_P
GEOS Local Image of CentralWestCoast    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for San Francisco/Monterey Bay Area, CA (17,4,5,8)
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Ground Weather Radar Station San Francisco Bay Area, CA
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