Monday, February17, 2020
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Marine Weather and Tides
Napa, 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 6:55AMSunset 5:50PM Monday February 17, 2020 4:07 AM PST (12:07 UTC) Moonrise 2:37AMMoonset 12:32PM Illumination 37% 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- 239 Am Pst Mon Feb 17 2020
Today..N winds 5 to 15 kt.
Tonight..NE winds up to 10 kt.
Tue..NE winds around 5 kt.
Tue night..W winds up to 10 kt.
Wed..NW winds around 5 kt.
Wed night..NW winds up to 10 kt.
Thu..N winds around 5 kt.
Fri..NW winds up to 10 kt.
PZZ500 239 Am Pst Mon Feb 17 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Light to moderate north to northwest winds will persist over the coastal waters during the day on Monday. Areas of gusty winds and wave heights greater than 10 feet will create hazardous seas for small crafts over parts of the waters. A series of northwest swells will continue through the forecast period.


7 Day Forecast for Marine Location Near Napa, CA
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location: 38.3, -122.28     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 171131 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 331 AM PST Mon Feb 17 2020

SYNOPSIS. Offshore flow will develop over the region today brining slightly warmer afternoon temperatures and cooler overnight conditions. Overall, expect dry and mild conditions to persist through the week with only slight chances of light precipitation late in the week and into the upcoming weekend.

DISCUSSION. as of 02:58 AM PST Monday . Moist onshore flow has resulted in more widespread stratus this morning developing along the coast and into the interior valleys. Patchy fog is even being reported across the interior valleys this morning with visibility falling to 1/4 mile at times. Meanwhile, high level clouds are also advecting inland across the region with surface temperatures generally in the middle 40s to lower 50s. While low clouds and/or fog may become a bit more widespread through sunrise, dying is likely to occur by midday as offshore flow develops inland. By this afternoon, breezy northerly winds are forecast to develop in the hills and higher elevations across the region. Gusts of 30 mph will be likely in the hills/ridges and up to 40 mph in the peaks while only isolated gusts are expected in the lower elevations. This pattern will also allow for slightly warmer temperatures region-wide this afternoon with middle 60s to lower 70s likely.

The weak offshore pattern is likely to continue into Tuesday as a ridge of high pressure persists offshore. This will result in another day of above average temperatures region-wide Tuesday afternoon. However, under clear sky conditions, overnight temperatures will trend cooler the next few nights with middle to upper 30s likely across the interior with lower 40s elsewhere.

Offshore flow will diminish by midweek, yet continued dry weather conditions along with temperatures above seasonal averages will persist through the remainder of the week. Forecast model guidance continues to indicate a mid/upper level cut-off low will approach central or southern California late in the week. While the NBM maintains dry conditions over our region, the operational GFS and ECMWF both indicate the potential for isolated showers over at least a portion of the region on Friday. Regardless, if any precipitation does occur, rainfall amounts will be very light and likely isolated. Something worth monitoring at least in the coming days.

Ensemble members and the NBM indicate another chance of light precipitation over the region late in the upcoming weekend as a system drops in from the northwest. However, operational models continue to trend drier with this system as well as the system will have a limited moisture tap. Regardless, chances for widespread beneficial rainfall appear unlikely during the next 7 days.

AVIATION. as of 3:31 AM PST Monday . For 12Z TAFs. Challenging short-term forecast as high clouds remain overhead, preventing a clear satellite view of the stratus and fog behavior at the low- levels. The surface observations at many of the TAF sites have trended better over the last several hours with VFR conditions reported at SNS, OAK, SFO, and the Monterey Bay Area terminals at the TAF publication time. Stratus has maintained IFR ceilings at SJC and LIFR visibilities at LVK. Think there will be at least a brief period around sunrise with the potential for additional stratus development in/around SFO and OAK, but with offshore flow developing above the surface over the next several hours, this potential should be limited. Should see VFR conditions return to SJC and LVK as the boundary layer dries through the morning and into the afternoon. Non-convective low level wind shear will be possible at SJC, OAK, LVK, and STS for several hours this morning as a result of north to northeast winds at around 925 mb.

Vicinity of KSFO . VFR conditions have largely prevailed overnight as last evening's low clouds have retreated to the Pacific side of the San Mateo Coast. There is still a limited period this morning between now and sunrise with the potential low clouds, but the window of opportunity appears to be limited as drier air advects in from the north to northeast within a few hours of sunrise. Light winds this morning will eventually become onshore later today.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . Low clouds have mixed-out around the Monterey Peninsula over the last few hours with VFR conditions returning to MRY. Could see low clouds try to redevelop over the next several hours at MRY. Meanwhile at SNS, infrared satellite imagery shows valley stratus/fog developing in the Salinas Valley, already within the vicinity of SNS as of the 12Z TAF publication time. Expect to see stratus expand in the Salinas Valley over the next few hours.

MARINE. as of 02:58 AM PST Monday . Light to moderate north to northwest winds will persist over the coastal waters during the day on Monday. Areas of gusty winds and wave heights greater than 10 feet will create hazardous seas for small crafts over parts of the waters. A series of northwest swells will continue through the forecast period.

MTR WATCHES/WARNINGS/ADVISORIES. Tday. 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



PUBLIC FORECAST: RGass AVIATION: Rowe MARINE: Rowe

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SFXC1 - San Francisco Bay Reserve, CA 15 mi83 min S 1.9
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 17 mi50 min 50°F 1019.8 hPa
UPBC1 20 mi128 min WNW 7 G 8
MZXC1 - 9415102 - Martinez-Amorco CA 20 mi56 min 51°F 53°F1019.8 hPa
PCOC1 - 9415144 - Port Chicago, CA 21 mi50 min 48°F 53°F1019.3 hPa
RCMC1 - 9414863 - Richmond, CA 27 mi50 min 51°F 53°F1019.8 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 28 mi56 min 54°F 1019.1 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 28 mi50 min 51°F 1020.4 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 30 mi45 min Calm 49°F 1020 hPa
OBXC1 34 mi50 min 51°F 51°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 34 mi50 min 50°F 1020.1 hPa
PXSC1 35 mi50 min 52°F 52°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 35 mi128 min SE 4.1 G 4.1
PXOC1 - 9414311 - San Francisco (Pier 1), CA 35 mi50 min 51°F 1019.1 hPa
LNDC1 35 mi50 min 51°F 1020 hPa
FTPC1 - 9414290 - San Francisco, CA 36 mi56 min 49°F 54°F1020.3 hPa
AAMC1 - 9414750 - Alameda, CA 37 mi50 min 50°F 55°F1020.1 hPa
46237 - San Francisco Bar, CA (142) 40 mi38 min 52°F4 ft
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 48 mi28 min NNW 9.7 G 12 49°F 53°F1020.4 hPa

Wind History for Martinez-Amorco Pier, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Napa, Napa County Airport, CA6 mi74 minN 01.75 miFog/Mist42°F42°F100%1019.3 hPa
Petaluma Municipal Airport, CA17 mi73 minN 010.00 miFair41°F41°F100%1020.3 hPa
Vacaville Nut Tree Airport, CA18 mi75 minN 1110.00 miFair59°F37°F44%1019.6 hPa
Novato / Gnoss Field, CA18 mi73 minS 410.00 mi45°F44°F100%1020.3 hPa
Fairfield / Travis Air Force Base, CA19 mi70 minS 510.00 miFair46°F43°F91%1020 hPa

Link to 5 minute data for KAPC

Wind History from APC (wind in knots)
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Last 24hrNW3W10W10W8W9W9W10W8W6W11W10W11W5CalmS4SE4CalmCalmCalmCalmNE3CalmCalmSE3
1 day agoN7N4CalmN4N4CalmS4SW53SW5Calm4S7S6S4CalmSW3CalmCalmCalmW5W8W7SW6
2 days agoCalmCalmCalmCalmN5CalmSW5Calm33SW8SW8SW6SW3W3CalmSW5SW5E3SE4CalmCalmNE4Calm

Tide / Current Tables for Napa, Napa River, Carquinez Strait, California
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Napa
Click for Map
Mon -- 02:35 AM PST     2.71 feet Low Tide
Mon -- 02:37 AM PST     Moonrise
Mon -- 06:57 AM PST     Sunrise
Mon -- 08:26 AM PST     7.45 feet High Tide
Mon -- 12:32 PM PST     Moonset
Mon -- 04:11 PM PST     0.10 feet Low Tide
Mon -- 05:49 PM PST     Sunset
Mon -- 10:52 PM PST     5.78 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.13.32.82.83.34.35.56.77.47.46.85.64.22.61.30.50.10.31.12.23.54.75.55.8

Tide / Current Tables for Mare Island Strait, So Vallejo, San Pablo Bay, California Current
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Mare Island Strait
Click for Map
Mon -- 01:43 AM PST     0.00 knots Slack
Mon -- 02:36 AM PST     Moonrise
Mon -- 05:10 AM PST     1.55 knots Max Flood
Mon -- 06:57 AM PST     Sunrise
Mon -- 08:33 AM PST     -0.00 knots Slack
Mon -- 11:57 AM PST     -2.21 knots Max Ebb
Mon -- 12:32 PM PST     Moonset
Mon -- 04:09 PM PST     0.00 knots Slack
Mon -- 05:49 PM PST     Sunset
Mon -- 07:41 PM PST     1.22 knots Max Flood
Mon -- 10:17 PM PST     -0.00 knots Slack
Mon -- 11:58 PM PST     -1.06 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.9-0.50.20.91.41.51.41.10.4-0.5-1.4-2-2.2-2-1.6-0.8-0.10.40.91.21.20.80.2-0.7

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 (7,2,3,4)
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Ground Weather Radar Station Sacramento, CA
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