Monday, April19, 2021
Privacy Policy
L-36.com

Marine Weather and Tides
Byron, CA

Version 3.4
NOTICE
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 6:23AMSunset 7:48PM Monday April 19, 2021 4:03 PM PDT (23:03 UTC) Moonrise 10:37AMMoonset 1:06AM Illumination 55% Phase: First Quarter Moon; Moon at 8 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
    EDIT      (on/off)   Help
PZZ531 San Francisco Bay South Of The Bay Bridge- 200 Pm Pdt Mon Apr 19 2021
.small craft advisory in effect until 9 pm pdt this evening...
Tonight..W winds 10 to 20 kt with gusts up to 30 kt.
Tue..W winds 10 to 20 kt with gusts up to 25 kt.
Tue night..SW winds 10 to 20 kt with gusts up to 25 kt.
Wed..W winds 5 to 15 kt.
Wed night..W winds up to 10 kt.
Thu..W winds 5 to 15 kt.
Thu night..SW winds 5 to 10 kt.
Fri..SW winds 5 to 15 kt.
Sat..SW winds 5 to 15 kt. A chance of rain.
PZZ500 200 Pm Pdt Mon Apr 19 2021
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Buoy observations show moderately gusty northwest winds, with near gale force gusts in the coastal waters south of point sur. Gale force gusts are expected to develop over the northern waters this evening. Gusty winds will persist through Tuesday evening. These winds will produce steep wind waves resulting in hazardous seas conditions, particularly for smaller vessels. Moderate northwest swell through the period along with a lighter longer period southerly swell.


7 Day Forecast for Marine Location Near Byron, CA
   Hourly   EDIT   Help
location: 37.82, -121.73     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
FXUS66 KMTR 192101 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 201 PM PDT Mon Apr 19 2021

SYNOPSIS. A cooling trend will continue into Tuesday with temperatures falling back to near seasonal averages for the remainder of the week. The weekend will bring cooler temperatures and increasing chances for precipitation from late Saturday or early Sunday through Monday.

DISCUSSION. as of 01:58 PM PDT Monday . The marine layer over the Central Coast has deepened today with stratus holding strong along the San Francisco Peninsula coastline down through the Monterey Bay region. Meanwhile, sky conditions have cleared inland with temperatures warming into the 60s and 70s away from the marine influences. Overall, maximum temperatures this afternoon will be cooler region-wide as the air mass aloft cools due to the flattening ridge.

Low clouds will once again penetrate inland overnight, especially around the Central Coast and into the Salinas Valley. However, expecting less widespread low clouds over the greater San Francisco Bay Area in general. This will be the result of increased northwest flow as a mid/upper level trough extends southward over the region. This too will allow for the cooling trend to continue into Tuesday afternoon with temperatures likely to drop back to near seasonal averages (lower 60s coast to low/mid 70s inland). Additionally, precipitation associated with this system is not anticipated to bring widespread rainfall to the region. Little change likely through mid/late week as troughing over the West maintains near seasonal temperatures with periods of night/morning low clouds.

Additional cooling is then expected on Saturday as an upper level low approaches the Pacific Northwest. As the system deepens and drops down the West Coast, forecast ensembles continue to indicate increased potential for widespread light to moderate rainfall across northern and central California from either late Saturday night or Sunday through Monday. Given we are still five to six days out, will remain guardedly optimistic and continue to monitor the latest forecast data in the coming days.

AVIATION. As of 11:30 AM PDT Monday . For the 18Z TAFs. Most inland sites VFR, with coastal sites at MVFR/IFR. Improvements to VFR for coastal sites should be seen by 19-20Z. KMRY could see MVFR until 20Z. VFR conditions around the area after 21Z and lasting through 06-08Z tonight. W/NW winds breezy this afternoon, around 10-15kts. Gusts between 20-25 kt possible, generally, through early tomorrow morning with stronger gust potential for SFO. Winds will remain light to moderately breezy through the night for most areas, preventing FG/BR for KSTS/KAPC Tuesday morning.

Vicinity of KSFO . Satellite shows cloud deck mixing out quickly, with skies FEW-SCT at 080-013. Skies will clear up this afternoon. W/NW winds will increase this afternoon to 20-25+ knots lasting through Tuesday evening. Strongest gusts will be from 09-12Z this morning, with models hinting at G30kts. Will be monitoring for AWW criteria. Winds will relax to 15G20kts for the remainder of Tuesday. Low clouds will return tonight, with prevailing deck SCT010-015.

SFO Bridge Approach . Stratus deck will fill in from 09-16Z, with more confidence for SCT-BKN cigs at 010-015.

Monterey Bay Terminals . The marine layer is about an hour away from scattering out, with KSNS seeing SCT013 already. VFR conditions expected this afternoon before low clouds return this evening and tonight. Light winds this morning increasing this afternoon to around 15 kt. Breezy conditions may linger into the evening.

MARINE. as of 11:28 AM PDT Monday . Northwest winds will increase through the day as a disturbance moves southward from the Pacific Northwest into northern California. Gale force gusts are expected to develop over portions of the coastal waters starting with the Big Sur Coast by late this afternoon before winds increase over the northern waters this evening and persist into Tuesday. These winds will produce steep wind waves resulting in hazardous seas conditions, particularly for smaller vessels. Moderate northwest swell through the period along with a lighter longer period southerly swell.

MTR WATCHES/WARNINGS/ADVISORIES. Tngt. SCA . Mry Bay SCA . Pigeon Pt to Pt Pinos 0-10 nm SCA . Pt Arena to Pt Reyes 0-10 nm until 9 PM SCA . Pt Arena to Pigeon Pt 10-60 nm until 9 PM GLW . Pt Arena to Pigeon Pt 10-60 nm from 9 PM SCA . Pt Pinos to Pt Piedras Blancas 0-10 nm until 3 PM GLW . Pt Pinos to Pt Piedras Blancas 0-10 nm SCA . Pt Reyes to Pigeon Pt 0-10 nm SCA . Pigeon Pt to Pt Piedras Blancas 10-60 nm GLW . Pt Arena to Pt Reyes 0-10 nm from 9 PM



PUBLIC FORECAST: RGass AVIATION: Dhuyvetter MARINE: Dhuyvetter

Visit us at www.weather.gov/sanfrancisco

Follow us on Facebook, Twitter, and YouTube at: www.facebook.com/nwsbayarea www.twitter.com/nwsbayarea www.youtube.com/nwsbayarea


Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 17 mi45 min NW 9.9 G 17 73°F 1015.7 hPa
PCOC1 - 9415144 - Port Chicago, CA 23 mi45 min W 13 G 17 71°F 63°F1016.2 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 26 mi45 min W 9.9 G 14 71°F 62°F1016.6 hPa
UPBC1 26 mi45 min W 12 G 16
LNDC1 29 mi45 min S 7 G 8 58°F 1018.5 hPa
AAMC1 - 9414750 - Alameda, CA 30 mi45 min WSW 8.9 G 11 56°F 63°F1018.9 hPa
CQUC1 31 mi44 min 61°F
SFXC1 - San Francisco Bay Reserve, CA 31 mi78 min W 13 75°F 1017 hPa50°F
OBXC1 32 mi45 min 56°F 49°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 32 mi45 min W 5.1 G 8 58°F 1018.6 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 32 mi45 min WSW 9.9 G 12
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 33 mi45 min SW 11 G 13 65°F 1016.6 hPa
RTYC1 - 9414523 - Redwood City, CA 33 mi45 min WNW 11 G 12 62°F 1019.1 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 34 mi45 min S 19 G 23 55°F 1018.5 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 35 mi45 min W 8.9 G 16 58°F 1017.7 hPa
PXSC1 35 mi45 min 57°F 51°F
RCMC1 - 9414863 - Richmond, CA 37 mi51 min SSE 9.9 G 13 58°F 60°F1017.9 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 38 mi52 min SSE 11 59°F 1017 hPa
FTPC1 - 9414290 - San Francisco, CA 39 mi45 min WSW 15 G 21 54°F 58°F1018.3 hPa
46237 - San Francisco Bar, CA (142) 48 mi33 min 54°F6 ft

Wind History for Port Chicago, CA
(wind in knots)    EDIT      (on/off)   Help
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
Last
24hr
W11
W14
G18
W14
G17
W14
G17
W17
SE2
--
SW6
SW5
G8
W13
W12
G16
W12
G15
W15
W13
G16
SW9
SW7
SW10
SW9
G13
W12
W12
W16
W14
G17
W13
G16
W13
G16
1 day
ago
W5
G12
W15
W18
W21
W19
W13
SW9
SW12
W10
SW8
G13
SW7
SW5
G9
SW5
SW4
SW4
G7
S8
SW6
SW4
G8
W6
W5
W5
W4
W4
W5
2 days
ago
W16
G20
W18
W17
W14
G20
W14
G17
SW8
G13
W13
G16
SW9
G12
SW8
G11
SW10
G13
SW8
G13
SW7
G12
SW7
G11
SW9
SW9
G13
SW9
SW10
G13
SW9
G12
W11
W13
W15
W12
G16
W11
G15
W13

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Livermore, Livermore Municipal Airport, CA10 mi70 minWNW 1110.00 miFair75°F38°F26%1017 hPa
Concord, Buchanan Field, CA20 mi70 minWSW 810.00 miFair79°F45°F30%1015.2 hPa
Hayward, Hayward Air Terminal, CA23 mi69 minWNW 810.00 miFair60°F47°F62%1019.9 hPa

Link to 5 minute data for KLVK

Wind History from LVK (wind in knots)
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
Last 24hrW9W17W13W10W7W3CalmCalmNW6NW5W5W6NW8W5W7NW8NW7NW9NW5NW5NW10NW9NW10NW11
1 day agoNE9
G15
NE5W12W135W7SW3CalmCalmCalmCalmCalmE3CalmCalmCalmCalmCalmCalm35S6SW7--
2 days agoW12W14W12W12W12NW9W9W7W6W6W5CalmW3SW3CalmCalmSW33Calm4463W5

Tide / Current Tables for Borden Highway Bridge, Old River, San Joaquin River, California
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Borden Highway Bridge
Click for Map
Mon -- 02:01 AM PDT     2.18 feet High Tide
Mon -- 02:05 AM PDT     Moonset
Mon -- 05:59 AM PDT     1.47 feet Low Tide
Mon -- 06:25 AM PDT     Sunrise
Mon -- 11:15 AM PDT     2.79 feet High Tide
Mon -- 11:36 AM PDT     Moonrise
Mon -- 07:44 PM PDT     0.13 feet Low Tide
Mon -- 07:46 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12
am
1
am
2
am
3
am
4
am
5
am
6
am
7
am
8
am
9
am
10
am
11
am
12
pm
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
1.82.12.22.11.81.61.51.61.82.22.62.82.72.52.11.610.60.30.20.10.30.61

Tide / Current Tables for West Island Lt .5 mi SE, San Joaquin River, California Current
   EDIT      (on/off)   Help   One Week of Data
West Island Lt .5 mi SE
Click for Map
Mon -- 01:08 AM PDT     -0.00 knots Slack
Mon -- 02:06 AM PDT     Moonset
Mon -- 03:16 AM PDT     -0.20 knots Max Ebb
Mon -- 05:26 AM PDT     0.00 knots Slack
Mon -- 06:25 AM PDT     Sunrise
Mon -- 08:10 AM PDT     0.30 knots Max Flood
Mon -- 10:32 AM PDT     -0.00 knots Slack
Mon -- 11:36 AM PDT     Moonrise
Mon -- 02:20 PM PDT     -0.82 knots Max Ebb
Mon -- 07:07 PM PDT     0.00 knots Slack
Mon -- 07:47 PM PDT     Sunset
Mon -- 10:58 PM PDT     0.36 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12
am
1
am
2
am
3
am
4
am
5
am
6
am
7
am
8
am
9
am
10
am
11
am
12
pm
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
0.20-0.1-0.2-0.2-0.10.10.20.30.30.1-0.1-0.4-0.7-0.8-0.8-0.7-0.5-0.3-00.20.30.30.4

Weather Map
       (on/off)   Help Weather Map
wmap_P
GEOS Local Image of CentralWestCoast    EDIT
NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
Link to Loop

Other links: GEOS-West     Contential US     Full GOES-East
Ground Weather Radar Station




Please read website Cookie, Privacy, and Disclamers by clicking HERE.