Wednesday, January29, 2020
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Marine Weather and Tides
Monte Sereno, 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 7:12AMSunset 5:29PM Tuesday January 28, 2020 9:04 PM PST (05:04 UTC) Moonrise 9:39AMMoonset 9:14PM Illumination 18% Phase: Waxing Crescent; Moon at 4 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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PZZ560 Coastal Waters From Pigeon Point To Point Pinos California Out To 10 Nm- 223 Pm Pst Tue Jan 28 2020
.small craft advisory in effect from 9 pm pst this evening through Wednesday evening...
Tonight..NW winds 10 to 20 kt. Gusts up to 30 kt after midnight. Wind waves 3 to 4 ft. W swell 10 to 12 ft at 14 seconds.
Wed..NW winds 15 to 25 kt with gusts up to 35 kt. Wind waves 5 to 6 ft. W swell 10 to 12 ft at 14 seconds.
Wed night..NW winds 10 to 20 kt with gusts up to 30 kt. Wind waves 4 to 5 ft. W swell 7 to 9 ft at 14 seconds.
Thu..NW winds 15 to 20 kt with gusts up to 30 kt. Wind waves 4 to 5 ft. W swell 6 to 8 ft at 15 seconds.
Thu night..NW winds 10 to 20 kt with gusts up to 25 kt. Wind waves 3 to 4 ft. W swell 8 to 10 ft at 16 seconds.
Fri..NW winds 10 to 20 kt with gusts up to 25 kt. Wind waves 3 to 4 ft. W swell 8 to 9 ft at 15 seconds.
Fri night..N winds 5 to 10 kt. Wind waves 1 ft. W swell 7 to 9 ft at 14 seconds.
Sat..N winds 5 to 15 kt. Wind waves 1 to 2 ft. W swell 6 to 7 ft.
Sun..NW winds 20 to 30 kt with gusts up to 40 kt. Wind waves 7 to 8 ft. W swell 8 to 10 ft.
PZZ500 223 Pm Pst Tue Jan 28 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... A weak cold front continues to move through the coastal waters late this afternoon. Northerly winds will increase behind the front this evening and overnight. Increasing winds will result in steeper wind waves. Conditions will remain elevated through the work week. A long period northwest swell will arrive later this week.


7 Day Forecast for Marine Location Near Monte Sereno, CA
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location: 37.21, -122.06     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 290446 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 846 PM PST Tue Jan 28 2020

SYNOPSIS. Dry conditions are forecast regionwide through the remainder of the week, along with a warming trend. Breezy and cooler weather is forecast for Sunday. Cooler temperatures expected to persist into early next week.

DISCUSSION. As of 8:45 PM PST Tuesday . Residual low level moisture left over from this morning's weak weather system has resulted in areas of low clouds this evening, especially south of San Francisco. Expect areas of low clouds, along with patchy fog, to persist overnight, but then clear in all areas by late Wednesday morning as drier northerly flow develops.

An upper ridge, currently centered offshore along 130W, is forecast to build inland over California by tomorrow and then strengthen through the end of the week. This will result in a warming trend through at least Friday. Both the ECMWF and GFS have backed off on the strength of the ridge slightly over the past few days. Nonetheless, temperatures are still expected to warm to 5 to 10 degrees above normal by Thursday and Friday. Lower 70s are likely in the warmer locations by Thursday and mid 70s are forecast across southern portions of our area by Friday.

Although the upper ridge is forecast to maintain its strength into Saturday, both the GFS and ECMWF MOS guidance indicate slight cooling across most of our area on Saturday, as does the latest NBM. This is likely due to an expected change in low level flow from light offshore on Friday to onshore by Saturday afternoon. Only the far southern interior portions of our area are expected to maintain a warming trend into Saturday. In any case, temperatures across our entire region will remain warmer than average through Saturday.

Significant cooling is then forecast for Sunday as the ridge rapidly breaks down and a cool, but mostly dry, upper trough sweeps into our area from the northwest. High temperatures on Sunday are forecast to be anywhere from 7 to 15 degrees cooler than Saturday. In addition, gusty northwest winds are likely on Sunday which will make the day feel even cooler. The Sunday system looks to be very dry and models indicate nothing more than isolated showers or sprinkles that day. Winds will ease by Monday, but cool conditions will persist into early next week. There is a potential for freezing or near freezing temperatures in our cooler inland locations by Monday night.

AVIATION. as of 4:50 PM PST Tuesday . For 00Z TAFs. A weak surface to lower level cool front from the San Mateo Coast to southern Napa county is moving southeastward late this afternoon generating mainly MVFR ceilings, though at times there have been very local IFR conditions on the coastline. The coastal terrain is also causing sluggishness in the forward motion of the front. Cooler air advection is primarily focusing at 925 mb which turns neutral tonight then warm air advection Wednesday; high res model output leans toward sufficiently drier air Wednesday supporting VFR, though will soon see if the 00z WRF shows the same. A marginal tightening of the 925 mb thermal gradient leading to later week warmer air as advertised could help cause patchy low clouds /MVFR ceilings/ Wednesday.

Jet stream cirrus and cirrostratus will continue to move in from the north tonight and early Wednesday morning as the north-south aligned jet advances slowly eastward from CA to NV. Areal coverage as well as thickness of higher clouds may offset the rate of boundary layer cooling, however will have to watch for possible low clouds and/or fog tonight into Wednesday morning.

Vicinity of KSFO . Regrowth of low clouds has occurred, 5 min obs show MVFR continuing with west wind at 10 knots. Cool front is weak though aloft at 925 mb it is remarkably aligned well with present location of low clouds seen on satellite. Model forecasts indicate a slow progression of the surface and lower level front to the southeast through this evening. Best can tell from recent high resolution model output some drying should arrive by mid evening helping to lift ceilings or even mix it out to scattered clouds. Low confidence if and how long low clouds return tonight, will monitor satellite and obs.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . Still ahead of the cool front here, weak cool air advection then commences tonight thus for now VFR continues. Cloud ceilings forecast to lower tonight to MVFR though in spots IFR is possible due to combination convergence along the frontal boundary and night-time cooling of the boundary layer. High clouds with jet stream winds should mainly stay to our north for the most part tonight.

MARINE. as of 3:42 PM PST Tuesday . A weak cold front continues to move through the coastal waters late this afternoon. Northerly winds will increase behind the front this evening and overnight. Increasing winds will result in steeper wind waves. Conditions will remain elevated through the work week. A Long period northwest swell will arrive later this week.

MTR WATCHES/WARNINGS/ADVISORIES. Tngt. SCA . Pigeon Pt to Pt Pinos 0-10 nm from 9 PM SCA . Pt Arena to Pigeon Pt 10-60 nm SCA . Pt Arena to Pt Reyes 0-10 nm SCA . Pt Pinos to Pt Piedras Blancas 0-10 nm SCA . Pigeon Pt to Pt Piedras Blancas 10-60 nm SCA . Pt Reyes to Pigeon Pt 0-10 nm from 9 PM



PUBLIC FORECAST: Dykema AVIATION: Canepa MARINE: MM

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RTYC1 - 9414523 - Redwood City, CA 22 mi46 min W 5.1 G 6 53°F 56°F1026.6 hPa
ELXC1 - Elkhorn Slough Reserve, CA 32 mi79 min SSE 1.9 53°F 1025 hPa52°F
46092 - MBM1 32 mi47 min NW 14 55°F 55°F1025.5 hPa (+0.3)
46042 - MONTEREY - 27NM West of Monterey Bay, CA 34 mi24 min NNW 12 G 16 55°F 56°F1026.5 hPa52°F
46114 - West Monterey Bay, CA 37 mi34 min 55°F10 ft
46240 - Cabrillo Point, Monterey Bay, CA (158) 41 mi34 min 56°F4 ft
AAMC1 - 9414750 - Alameda, CA 41 mi46 min 54°F
LNDC1 42 mi46 min N 1.9 G 2.9 54°F 1026 hPa
MEYC1 43 mi88 min 56°F1026.1 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 43 mi52 min W 5.1 G 6
OBXC1 44 mi46 min 54°F 52°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 44 mi46 min NW 1.9 G 2.9 53°F 1026 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 44 mi46 min WSW 5.1 G 8 54°F 1025 hPa
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 45 mi24 min NW 14 G 18 55°F 55°F1026.9 hPa52°F
PXSC1 45 mi46 min 55°F 50°F
FTPC1 - 9414290 - San Francisco, CA 46 mi52 min WSW 6 G 8 53°F 54°F1026 hPa

Wind History for Redwood City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Jose, San Jose International Airport, CA13 mi2.2 hrsNNW 910.00 miPartly Cloudy55°F48°F77%1025.7 hPa
San Jose / Reid / Hillv, CA16 mi77 minN 79.00 miPartly Cloudy54°F48°F82%1026.1 hPa
Palo Alto Airport, CA19 mi2.3 hrsWNW 610.00 miPartly Cloudy54°F46°F77%1026.1 hPa
San Carlos Airport, CA24 mi2.3 hrsWSW 610.00 miMostly Cloudy55°F48°F77%1026.1 hPa
Watsonville, Watsonville Municipal Airport, CA24 mi2.2 hrsE 39.00 miOvercast53°F51°F93%1025.6 hPa

Link to 5 minute data for KSJC

Wind History from SJC (wind in knots)
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Last 24hrN6N6N5CalmNW6CalmCalmS4CalmSE3S3SE5S6S6SE7S6CalmNW6NE4CalmN10NW10N9NW6
1 day agoN4CalmSW3CalmSE4CalmS3CalmS4SE4CalmSE3S3CalmNW7CalmNE7N5N5CalmCalmN6NW6N12
2 days agoCalmW4N4NW4CalmSE6S3CalmNW6NE5SE4CalmN3N4N8NW12NW10NW12NW11NW11N10N5N5N6

Tide / Current Tables for Gold Street Bridge, Alviso Slough, San Francisco Bay, California
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Gold Street Bridge
Click for Map
Wed -- 03:57 AM PST     8.41 feet High Tide
Wed -- 07:13 AM PST     Sunrise
Wed -- 10:04 AM PST     Moonrise
Wed -- 10:44 AM PST     2.70 feet Low Tide
Wed -- 03:07 PM PST     8.02 feet High Tide
Wed -- 05:28 PM PST     Sunset
Wed -- 10:09 PM PST     Moonset
Wed -- 10:47 PM PST     0.88 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.34.36.47.98.48.17.15.94.63.52.82.73.75.47.187.87.15.94.531.81.10.9

Tide / Current Tables for Dumbarton Point 2.3 mi NE, South San Francisco Bay, California Current
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Dumbarton Point 2.3 mi NE
Click for Map
Wed -- 12:50 AM PST     1.16 knots Max Flood
Wed -- 04:13 AM PST     -0.01 knots Slack
Wed -- 07:14 AM PST     Sunrise
Wed -- 08:04 AM PST     -0.73 knots Max Ebb
Wed -- 10:05 AM PST     Moonrise
Wed -- 10:28 AM PST     0.00 knots Slack
Wed -- 12:51 PM PST     0.78 knots Max Flood
Wed -- 03:43 PM PST     -0.00 knots Slack
Wed -- 05:28 PM PST     Sunset
Wed -- 08:14 PM PST     -0.97 knots Max Ebb
Wed -- 10:09 PM PST     Moonset
Wed -- 10:46 PM PST     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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11.210.70.1-0.2-0.5-0.7-0.7-0.5-0.20.20.70.80.60.3-0.1-0.4-0.6-0.9-1-0.8-0.40.1

Weather Map
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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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Wind Forecast for San Francisco/Monterey Bay Area, CA (0,6,7,8)
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Ground Weather Radar Station San Francisco Bay Area, CA
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