Monday, July13, 2020
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Marine Weather and Tides
Redwood City, CA

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
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.

Sunrise 5:57AMSunset 8:32PM Monday July 13, 2020 6:48 AM PDT (13:48 UTC) Moonrise 12:07AMMoonset 1:09PM Illumination 43% Phase: Third Quarter Moon; Moon at 23 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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PZZ530 San Pablo Bay, Suisun Bay, The West Delta And The San Francisco Bay North Of The Bay Bridge- 330 Am Pdt Mon Jul 13 2020
.small craft advisory in effect from 9 am pdt this morning through this evening...
.small craft advisory in effect from Tuesday morning through Tuesday evening...
Today..SW winds 15 to 25 kt with gusts up to 30 kt.
Tonight..SW winds 10 to 20 kt with gusts up to 30 kt.
Tue..SW winds 10 to 20 kt with gusts up to 30 kt.
Tue night..SW winds 10 to 20 kt with gusts up to 25 kt.
Wed..SW winds 15 to 25 kt with gusts up to 30 kt.
Wed night..SW winds 10 to 20 kt with gusts up to 25 kt.
Thu..SW winds 5 to 15 kt with gusts up to 25 kt.
Fri..SW winds 5 to 15 kt.
PZZ500 330 Am Pdt Mon Jul 13 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Gusty northwest winds continuing mainly over the northern and outer coastal waters today into Tuesday. These winds will generate steep fresh swell resulting in hazardous conditions for small craft vessels. By midweek, a nearly stationary low pressure trough will develop over the coastal waters and cause winds to shift to a southerly direction mainly over the southern and inner coastal waters. A longer period south swell will mix with the steep fresh northwest swell.


7 Day Forecast for Marine Location Near Redwood City, CA
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location: 37.52, -122.2     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 131153 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 453 AM PDT Mon Jul 13 2020

SYNOPSIS. Interior areas are forecast to cool through midweek as onshore flow increases and high pressure weakens. Temperatures will then likely remain near seasonal averages for the remainder of the week and into next weekend. Expect increasing night and morning low clouds through midweek.

DISCUSSION. as of 02:49 AM PDT Monday . More widespread stratus has developed over the Pacific and shifted southward from the San Francisco Peninsula down along the Big Sur Coast. While conditions to the north along the coast have cleared, do expect the boundary layer to continue to moisten as onshore flow increases through the remainder of the night. However, inland stratus intrusion will likely be limited to the Monterey Bay region and/or through the Golden Gate into Oakland.

Look for onshore flow to spread further inland today in response to weakening high pressure over the Desert Southwest and troughing over the Pacific Northwest. This will result in a cooling trend of around 5 to 12 degrees across the interior while only slight cooling is likely near the coast. As surface winds ease and turn southerly Tuesday into Wednesday, additional cooling is likely in places such as Big Sur, Santa Cruz and into the North Bay coastal valleys. Additionally, the marine layer will likely become better defined by midweek allowing for more widespread overnight and morning low clouds.

Another trough is forecast to develop along the West Coast late in the week which will help to keep temperatures near seasonal averages. While it is difficult to forecast the exact depth of the marine layer late in the week, do expect the typical ebb and flow of low clouds into the coastal valleys each night/morning. Slight warming of the interior looks possible by next weekend as onshore flow diminishes slightly.

AVIATION. as of 4:53 AM PDT Monday . for 12z TAFs. Much more ideal conditions for fog and stratus /VLIFR-IFR/ have developed overnight at the coast, bays and in the nearby coastal valleys while inland it's VFR. Patchy morning light drizzle has developed on the coast. Constant NW wind over the coastal waters has caused a fair amount of upwelling lowering sea surface temperatures to 50 F to 55 F, atypically chilly by 2 to 4 degrees for mid July. The marine layer has deepened slightly to 1,000 feet and onshore winds will usher in additional fog and stratus through daybreak. Diurnal warming and mixing will scatter out the fog and stratus from late morning to afternoon. VLIFR-IFR will roll back inland on onshore breezes tonight and Tuesday morning.

Vicinity of KSFO . Improving chances for IFR developing 12z to 17z today as the marine layer has deepened a little overnight and the onshore breeze has strengthened as well. Otherwise by late morning VFR is forecast. IFR ceiling likely returning tonight and Tuesday morning.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . VLIFR-IFR, patchy light drizzle until just after daybreak. Low to moderate confidence stratus mixes out to VFR by late morning, conditions are much more ideal than recent nights and mornings. An early return of IFR is likely for the evening, conditions VLIFR-IFR tonight and Tuesday morning possibly patchy light drizzle developing as well.

MARINE. as of 3:57 AM PDT Monday . Gusty northwest winds continuing mainly over the northern and outer coastal waters today into Tuesday. These winds will generate steep fresh swell resulting in hazardous conditions for small craft vessels. By midweek, a nearly stationary low pressure trough will develop over the coastal waters and cause winds to shift to a southerly direction mainly over the southern and inner coastal waters. A longer period south swell will mix with the steep fresh northwest swell.

MTR WATCHES/WARNINGS/ADVISORIES. Tday. SCA . Pt Reyes to Pigeon Pt 0-10 nm until 6 AM SCA . Pigeon Pt to Pt Pinos 0-10 nm until 6 AM SCA . Pt Arena to Pigeon Pt 10-60 nm SCA . Pt Pinos to Pt Piedras Blancas 0-10 nm until 3 PM SCA . Pigeon Pt to Pt Piedras Blancas 10-60 nm SCA . Pt Arena to Pt Reyes 0-10 nm SCA . SF Bay from 9 AM



PUBLIC FORECAST: RGass AVIATION/MARINE: Canepa

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RTYC1 - 9414523 - Redwood City, CA 1 mi54 min W 8.9 G 11 60°F 75°F1011.9 hPa
AAMC1 - 9414750 - Alameda, CA 18 mi54 min WSW 9.9 G 12 57°F 71°F1011.6 hPa
LNDC1 19 mi54 min WSW 8.9 G 11 57°F 1011.4 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 21 mi54 min S 1.9 G 2.9
OBXC1 21 mi54 min 57°F 56°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 21 mi54 min W 5.1 G 7 56°F 1011.4 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 22 mi54 min SE 5.1 G 7 55°F 1010.2 hPa
PXSC1 22 mi54 min 57°F 55°F
FTPC1 - 9414290 - San Francisco, CA 24 mi54 min SW 6 G 12 55°F 62°F1011.2 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 28 mi54 min S 13 G 20 57°F 1011.4 hPa
46237 - San Francisco Bar, CA (142) 29 mi48 min 58°F5 ft
TIBC1 - Tiburon Pier, San Francisco Bay, CA 29 mi50 min SSW 5.1 55°F 1011 hPa (+1.0)
RCMC1 - 9414863 - Richmond, CA 30 mi54 min SSE 8 G 9.9 57°F 64°F1010.4 hPa
UPBC1 36 mi54 min W 4.1 G 8
MZXC1 - 9415102 - Martinez-Amorco CA 36 mi54 min WNW 5.1 G 8.9 64°F 71°F1009.6 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 37 mi54 min SW 9.9 G 13 59°F 1009.7 hPa
PCOC1 - 9415144 - Port Chicago, CA 38 mi54 min SSW 5.1 G 8.9 59°F 71°F1009.4 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 38 mi38 min NW 18 G 21 54°F 54°F1011.5 hPa52°F
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 38 mi38 min NNW 14 G 19 56°F 1012.9 hPa53°F
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 40 mi54 min W 12 G 19 66°F 1008.3 hPa
SFXC1 - San Francisco Bay Reserve, CA 48 mi63 min W 12

Wind History for Redwood City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Carlos Airport, CA3 mi53 minW 810.00 miFair59°F51°F77%1011.8 hPa
Mountain View, Moffett Field, CA10 mi53 minNNE 310.00 mi59°F55°F88%1011.5 hPa
Hayward, Hayward Air Terminal, CA11 mi54 minW 710.00 miFair59°F52°F78%1012.2 hPa
San Francisco, San Francisco International Airport, CA11 mi52 minWNW 1010.00 miA Few Clouds55°F51°F87%1011.3 hPa
Oakland, Metro Oakland International Airport, CA12 mi55 minWSW 87.00 miMostly Cloudy61°F53°F75%1011.4 hPa
Half Moon Bay Airport, CA16 mi48 minWSW 35.00 miFog/Mist55°F51°F88%1012.9 hPa
San Jose, San Jose International Airport, CA18 mi55 minNNW 510.00 miFair61°F55°F81%1011.3 hPa
Livermore, Livermore Municipal Airport, CA24 mi55 minNW 1010.00 miFair59°F54°F83%1009.9 hPa

Link to 5 minute data for KSQL

Wind History from SQL (wind in knots)
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Last 24hrNW4CalmCalm3N7N7NW9N9W11W12--SW8W8W7W9W7W10W5CalmSE3NW6CalmW3W9
1 day agoNW3Calm33N6NW6N9N8N8--W12
G16
W8W9W7NW7N3CalmNW3NW6NW3NW3CalmCalmNW3
2 days agoCalmCalmN7N73N8NW5NW10W7W9NW6W9W6N5N4N3N3N3NW4NW3NW3CalmCalmCalm

Tide / Current Tables for Redwood Creek entrance (inside), San Francisco Bay, California
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Redwood Creek entrance (inside)
Click for Map
Mon -- 01:06 AM PDT     Moonrise
Mon -- 02:38 AM PDT     2.04 feet Low Tide
Mon -- 05:58 AM PDT     Sunrise
Mon -- 07:43 AM PDT     5.73 feet High Tide
Mon -- 01:48 PM PDT     1.88 feet Low Tide
Mon -- 02:08 PM PDT     Moonset
Mon -- 08:08 PM PDT     7.49 feet High Tide
Mon -- 08:30 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.52.62.12.12.73.74.85.65.75.44.63.72.72.11.92.33.34.6677.57.36.65.5

Tide / Current Tables for Dumbarton Bridge, San Francisco Bay, California Current
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Dumbarton Bridge
Click for Map
Mon -- 01:06 AM PDT     Moonrise
Mon -- 02:32 AM PDT     0.00 knots Slack
Mon -- 05:30 AM PDT     0.92 knots Max Flood
Mon -- 05:58 AM PDT     Sunrise
Mon -- 09:20 AM PDT     -0.00 knots Slack
Mon -- 11:16 AM PDT     -0.50 knots Max Ebb
Mon -- 02:03 PM PDT     0.00 knots Slack
Mon -- 02:08 PM PDT     Moonset
Mon -- 05:38 PM PDT     1.14 knots Max Flood
Mon -- 08:29 PM PDT     Sunset
Mon -- 09:29 PM PDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.7-0.5-0.20.20.70.90.90.80.50.1-0.3-0.5-0.4-0.3-00.30.81.11.110.70.3-0.3-0.7

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 (9,2,3,4)
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Ground Weather Radar Station San Francisco Bay Area, CA
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The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerous of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.