Thursday, December5, 2019
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Marine Weather and Tides
Milpitas, 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 7:05AMSunset 4:50PM Thursday December 5, 2019 1:41 PM PST (21:41 UTC) Moonrise 1:36PMMoonset 12:38AM Illumination 65% Phase: Waxing Gibbous; Moon at 9 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- 819 Am Pst Thu Dec 5 2019
.small craft advisory in effect from Friday morning through late Friday night...
Today..SE winds 5 to 10 kt.
Tonight..SE winds 5 to 10 kt.
Fri..SE winds 15 to 25 kt with gusts up to 30 kt. Rain.
Fri night..S winds 10 to 20 kt with gusts up to 25 kt. Showers and a slight chance of Thunderstorms.
Sat..S winds 15 to 25 kt with gusts up to 30 kt. Showers and a slight chance of Thunderstorms.
Sat night..SW winds 5 to 15 kt. Rain.
Sun..W winds up to 10 kt. A chance of rain.
Mon..NE winds up to 10 kt. Winds and wind waves higher in and near Thunderstorms.
PZZ500 819 Am Pst Thu Dec 5 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Moderate southerly winds today ahead of an approaching low pressure will strengthen further late tonight into Friday with an arriving cold front. Gale force winds are expected late Thursday night and into Friday. Moderate northwest swell will gradually build to around 10 to 15 feet Friday over the northern waters then spread south across the coastal waters over the weekend.


7 Day Forecast for Marine Location Near Milpitas, CA
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location: 37.44, -121.91     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 051820 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 1020 AM PST Thu Dec 5 2019

SYNOPSIS. After a brief break in wet weather conditions today, another cold front will sweep through the area on Friday resulting in widespread rainfall and gusty winds. Post-frontal showers and potentially isolated thunderstorms will continue through Saturday night before tapering off on Sunday.

DISCUSSION. as of 8:22 AM PST Thursday . There are still a few areas of fog impacting the morning commute. The Livermore ASOS is reporting 1/4 mile in fog, and Palo Alto is now indicating 1/2 mile visibility. Aside from these, visibilities are starting to improve, and range from from 3 or greater across the San Francisco Bay Area. Shower activity has pretty much ended, with no echoes being picked up by KMUX at this time.

We should see a break in our rainy pattern today with the next storm system due impact the area on Friday and Saturday with rainfall and gusty winds. Light showers are expected to begin Friday afternoon ahead of this system. The latest model guidance has slowed down the timing of the cold front passage, with the front moving into the North Bay late Friday afternoon then gradually moving south and east overnight. The Friday evening commute will likely be impacted across the North Bay and possibly SF, but areas southward not as much. Given the dynamics with the potent cold front and ample moisture, rainfall intensity will be of concern across the North Bay, especially in the Kincade Burn area. Hourly rainfall rates could exceed one half an inch in an hour leading to debris flows or flash flooding. Therefore, a Flash Flood Watch has been issued for the Kincade burn area Friday afternoon through Saturday morning. By Saturday morning the cold front will have pushed through much of the Bay Area. However, the parent low and upper trough moving through will keep showers going across the Bay Area Saturday into Sunday. Enough instability will be present with the frontal passage and with the upper trough justifying a slight chance of thunderstorms for Friday and Saturday. Rainfall totals from Friday into early Sunday range from 0.50"-1.25" in most urban areas, except 1.50-2.50" in the North Bay Valleys. In the hills/mountains, rain totals are forecast to range from 1.50"-4.00" in the North Bay Mountains, 1.25- 1.5" for the East Bay Hills, 1.50-3.00" in the Santa Cruz Mountains, and 1.00-3.00" across Monterey and San Benito Co. Mountains. Lesser amounts will be possible in the southern Salinas Valley.

In addition to the rain, southerly winds will ramp up ahead of and with the frontal passage. Winds will be strongest over the coastal waters, near the coast, and in the higher terrain. May need to consider possible wind advisory products later today.

A few lingering showers will be possible on Sunday as the upper trough slowly exits. High pressure aloft building in over the state will bring drier weather to the area Monday through at least Wednesday. A weak system is forecast to move across Northern California on Wednesday which could bring a few showers to northern zones late Wednesday.

AVIATION. as of 10:15 AM PST Thursday . For 18Z TAFs. Messy morning with reports of -DZ in the North Bay, and various cloud decks from the low levels to the high levels. The storm system anticipated over the next 48 hours has slowed significantly in recency and has led to very poor model to model agreement, thus, TAF confidence is low as well. Generally, the lingering low level moisture should mix out and leave generally MVFR to VFR cigs thru the day today with increasing high clouds at 20000-25000 ft moving in from the west. A few pop up showers are possible thru the day but should be fairly weak in intensity and coverage. S-SE winds begin to pick up late in the TAF period ahead of the next cold front (expected to arrive later Friday), with periods of borderline LLWS possible at or around 2000 feet late tonight and into Friday. Looking ahead, passing cold front will become gusty 25-35kt, with moderate to heavy rain with the frontal passage.

Vicinity of KSFO . Borderline MVFR/VFR with clouds at several layers this morning but should consolidate into the afternoon. Light southerly winds today, becoming gusty SE winds tomorrow. LLWS possible overnight tonight when winds at 2000 ft increase while surface winds stay light.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . VFR thru the day with FEW-SCT clouds at low to mid levels and a BKN level at the high levels. Increasing mid to low level clouds ahead of the next storm system late in the TAF period. Breezy through the Salinas valley later today, tonight, and becoming gusty early Friday.

MARINE. as of 10:00 AM PST Thursday . Moderate southerly winds today ahead of an approaching low pressure will strengthen further late tonight into Friday with an arriving cold front. Gale force winds are expected late Thursday night and into Friday. Moderate northwest swell will gradually build to around 10 to 15 feet Friday over the northern waters then spread south across the coastal waters over the weekend.

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



PUBLIC FORECAST: Sims AVIATION: DRP MARINE: DRP

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RTYC1 - 9414523 - Redwood City, CA 17 mi59 min Calm G 1 57°F 55°F1018.3 hPa
AAMC1 - 9414750 - Alameda, CA 31 mi53 min 53°F
LNDC1 31 mi59 min W 2.9 G 5.1 56°F 1017.6 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 33 mi59 min W 2.9 G 2.9
OKXC1 - 9414776 - Oakland (Berth 34), CA 34 mi59 min W 2.9 G 4.1 54°F 1017.7 hPa
OBXC1 34 mi59 min 54°F 54°F
PXSC1 36 mi53 min 55°F 55°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 36 mi53 min N 1.9 G 2.9 54°F 1016.7 hPa
FTPC1 - 9414290 - San Francisco, CA 39 mi65 min NNE 6 G 7 55°F 54°F1018.1 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 40 mi53 min WNW 4.1 G 5.1 57°F 1018 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 41 mi59 min ESE 8 G 8.9 54°F 1018.5 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 42 mi54 min NNW 2.9 55°F 1018 hPa
RCMC1 - 9414863 - Richmond, CA 43 mi53 min 54°F
UPBC1 43 mi53 min ENE 9.9 G 12
PCOC1 - 9415144 - Port Chicago, CA 43 mi53 min 53°F
MZXC1 - 9415102 - Martinez-Amorco CA 43 mi59 min NE 8.9 G 9.9 55°F 53°F1018.5 hPa55°F
ELXC1 - Elkhorn Slough Reserve, CA 44 mi116 min NNE 7 63°F 1018 hPa55°F
46237 - San Francisco Bar, CA (142) 45 mi41 min 53°F4 ft
MLSC1 - Moss Landing, South Harbor, CA 45 mi52 min WNW 8 G 21 59°F 1017.8 hPa52°F
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 47 mi53 min E 12 G 13 56°F 1017.8 hPa
46092 - MBM1 48 mi94 min S 7.8 59°F 57°F1018 hPa (+0.0)

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, CA5 mi48 minSW 410.00 miOvercast62°F53°F73%1017.1 hPa
San Jose / Reid / Hillv, CA8 mi54 minSSE 1210.00 miOvercast63°F51°F68%1017.3 hPa
Palo Alto Airport, CA11 mi54 minVar 310.00 miMostly Cloudy57°F53°F88%1017.6 hPa
Hayward, Hayward Air Terminal, CA19 mi47 minWNW 310.00 miOvercast60°F52°F75%1018.4 hPa
Livermore, Livermore Municipal Airport, CA19 mi48 minENE 65.00 miFog/Mist56°F52°F87%1017.6 hPa
San Carlos Airport, CA19 mi54 minN 010.00 miMostly Cloudy57°F53°F88%1017.9 hPa
Oakland, Metro Oakland International Airport, CA24 mi48 minW 410.00 miOvercast56°F51°F84%1017.7 hPa

Link to 5 minute data for KSJC

Wind History from SJC (wind in knots)
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Last 24hrW5NW3NW3W4W3NW3CalmCalmSE3E4SW3E4CalmCalmCalmCalmCalmCalmCalmCalmSW33SE9SW4
1 day agoCalmCalmW3W3CalmCalmSW4S3SE3S3E5S6NW6NE5SW5CalmCalmW4CalmNW3CalmCalmSW3W4
2 days agoSE23
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Tide / Current Tables for Coyote Creek, Tributary #1, San Francisco Bay, California
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Coyote Creek
Click for Map
Thu -- 12:38 AM PST     Moonset
Thu -- 02:29 AM PST     0.70 feet Low Tide
Thu -- 07:07 AM PST     Sunrise
Thu -- 08:22 AM PST     7.80 feet High Tide
Thu -- 01:35 PM PST     Moonrise
Thu -- 03:58 PM PST     1.79 feet Low Tide
Thu -- 04:49 PM PST     Sunset
Thu -- 08:02 PM PST     6.58 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.21.30.80.81.83.45.36.97.77.77.16.14.93.72.721.82.54.25.86.66.45.74.7

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
Thu -- 12:39 AM PST     Moonset
Thu -- 02:05 AM PST     0.00 knots Slack
Thu -- 04:59 AM PST     1.10 knots Max Flood
Thu -- 07:07 AM PST     Sunrise
Thu -- 08:08 AM PST     -0.00 knots Slack
Thu -- 12:16 PM PST     -0.74 knots Max Ebb
Thu -- 01:36 PM PST     Moonrise
Thu -- 03:02 PM PST     0.01 knots Slack
Thu -- 04:49 PM PST     Sunset
Thu -- 05:25 PM PST     0.73 knots Max Flood
Thu -- 08:07 PM PST     -0.01 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.8-0.5-00.511.110.70.1-0.3-0.5-0.7-0.7-0.7-0.5-00.50.70.70.50.1-0.3-0.5-0.7

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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for San Francisco/Monterey Bay Area, CA (16,3,4,5)
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Ground Weather Radar Station San Francisco Bay Area, CA
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