Sunday, March7, 2021
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Marine Weather and Tides
Colma, 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 6:30AMSunset 6:10PM Sunday March 7, 2021 7:48 PM PST (03:48 UTC) Moonrise 2:55AMMoonset 12:26PM Illumination 30% Phase: Waning Crescent; Moon at 24 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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PZZ531 San Francisco Bay South Of The Bay Bridge- 201 Pm Pst Sun Mar 7 2021
Today..N winds around 5 kt, becoming W 5 to 15 kt with gusts up to 25 kt this afternoon.
Tonight..W winds 5 to 15 kt.
Mon..SW winds 10 to 20 kt with gusts up to 25 kt. A chance of rain.
Mon night..S winds 5 to 15 kt with gusts up to 25 kt. A chance of rain.
Tue..S winds 5 to 15 kt. Rain.
Tue night..SW winds 5 to 10 kt. Rain.
Wed..W winds up to 10 kt. Rain likely.
Thu..NW winds up to 10 kt.
PZZ500 201 Pm Pst Sun Mar 7 2021
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Northwest winds will prevail through the evening with locally moderate occasionally gusty winds along the immediate coast, particularly south of point sur, between pescadero and davenport, through the golden gate gap, and north of point reyes. Northwest winds ease and begin to back towards the west overnight and southwest tomorrow ahead of an approaching storm system that will bring showers and potentially Thunderstorms across the waters through mid week. Moderate northwest swell continues through Sunday, with a stronger northwest swell arriving Monday, bringing hazardous seas conditions for smaller vessels.


7 Day Forecast for Marine Location Near Colma, CA
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location: 37.68, -122.42     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 080245 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 643 PM PST Sun Mar 7 2021

SYNOPSIS. Dry conditions will continue through the rest of the weekend, and temperatures will remain slightly below normal. A cool weather system dropping south offshore during the first half of the work week will produce cool and showery weather from Monday through Wednesday, along with the potential for thunderstorms on Tuesday and Wednesday. Drier and warmer conditions are likely later in the week.

DISCUSSION. as of 02:05 PM PST Sunday . Sunday afternoon is shaping up to be very similar to yesterday with mostly clear skies and highs peaking in the upper 50s and low 60s. Winds will be more tame this afternoon with only slightly breezy conditions along the coast. Overnight conditions look to follow a similar path to last night as well, meaning interior locations could see lows fall into the low 30s once again. Coastal areas look to stay closer to the 40 degree mark.

Monday begins the next batch of rain chances as a cold upper-level low approaches the Bay Area. There is strong confidence in the track and timing of this system, which places the first showers over northern Sonoma Co Monday morning as a trough reaches south of the low. The low will center itself just off the coast of Oregon that morning and will continue southward along the coast. This will cause the first few showers on Monday to be scattered, but widespread rainfall will increase as the low nears the Bay Area on Tuesday. Rainfall rates will become more moderate as the low approaches, and the cold air a loft with instability at the surface increases the chances for convection. Said convection brings the possibility for small hail production and even slight chances for infrequent lightning. The chances convective showers will start in the late morning for the Bay Area and move slowly south into the Monterey Bay and Big Sur Coast. Potential for convection looks to linger into the evening before dissipating overnight.

Showers are set to continue well into Wednesday as the center of the low moves into the Bay Area and curves inland. This push inland will begin to cut off some of the moister from the low and rain chances will back off into the evening. There are some agreements between longer term models and ensemble members of how much rain will linger, but most seem to agree on drying conditions into the late night.

Forecasted rainfall totals favor coastal Mountain ranges for the highest amounts and much less for more inland areas. The current forecast shows 1" to 1.5" for higher peaks along the coast over the 3-day period. Lower elevations along the coast are set to see 0.50" to 1", while interior areas will likely stay below 0.50". As this is over a 3-day period and rainfall rates look mild with only brief moments of moderate rainfall: the concern for debris flow is low. Ponding will be possible in favored locations, but flood potential is also low.

After this system, the extended forecast favors dry conditions into next weekend. Afternoon highs look to rise back into the 60s in time for the weekend, but the drier air may lead to cold nights.

AVIATION. as of 6:43 PM PST Sunday . For the 00Z TAFs. VFR prevails except satellite showed late afternoon patchy low clouds /VFR-MVFR/ along coastal San Mateo county and along northern coastal Monterey county. Patchy clouds over northern Sonoma county will continue dissipating with nocturnal cooling and arriving cold air advection.

A dry cold front will sweep southeastward across the cwa tonight and early Monday morning, bringing cold air advection from the surface up through 925 mb, 850 mb and 700 mb levels. Dewpoint temperatures (a measure of water vapor) initially in the lower to mid 40s will lower (dry) tonight and Monday, turbulent mixing winds and cold air advection accompanying the newly arriving air mass supports VFR tonight and Monday morning. Lowering cloud layers and showers develop later Monday and Monday night as the 500 mb low arrives from the northwest. Preceding this low the newly arrived air mass will favor quickly lowering freezing level and wet bulb zero heights for snow showers at hill/mountain tops. As a heads up, beyond the 00z taf cycle expect nearly continuous cold air advection to Wed/Thu; pilots expect low to very low freezing levels, instability and snow showers as well as a slight chance of thunderstorms especially 12z Tue-12z Wed per recent Storm Prediction Center convective outlook.

Vicinity of KSFO . VFR, west wind occasionally gusting to 20 knots possibly higher gusts with a dry cold front arriving tonight. Lowering clouds Monday /MVFR/ late afternoon and evening with showers developing.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . VFR, west to southwest winds 5 to 15 knots except locally southeast winds to 10 knots becoming west to northwest tonight after a dry cold frontal passage. Gusty winds to 20 knots are possible around frontal passage. Lowering clouds /VFR-MVFR/ late Monday and Monday night.

MARINE. as of 02:05 PM PST Sunday . Northwest winds will prevail through the evening with locally moderate occasionally gusty winds along the immediate coast, particularly south of Point Sur, between Pescadero and Davenport, through the Golden Gate gap, and north of Point Reyes. Northwest winds ease and begin to back towards the west overnight and southwest tomorrow ahead of an approaching storm system that will bring showers and potentially thunderstorms across the waters through mid week. Moderate northwest swell continues through Sunday, with a stronger northwest swell arriving Monday, bringing hazardous seas conditions for smaller vessels.

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



PUBLIC FORECAST: Murdock AVIATION: Canepa MARINE: DRP

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PXOC1 - 9414311 - San Francisco (Pier 1), CA 8 mi49 min WSW 5.1 G 9.9 51°F 1016.7 hPa (+0.0)
AAMC1 - 9414750 - Alameda, CA 9 mi49 min W 8.9 G 12 52°F 58°F1017.9 hPa (-0.3)
FTPC1 - 9414290 - San Francisco, CA 9 mi49 min W 7 G 14 50°F 54°F1017.6 hPa (-0.4)
PXSC1 9 mi49 min 52°F 45°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 10 mi49 min W 12 G 13
OBXC1 10 mi49 min 52°F 46°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 10 mi49 min W 9.9 G 14 51°F 1017.4 hPa
LNDC1 11 mi49 min W 1.9 G 6 52°F 1017.6 hPa (-0.0)
46237 - San Francisco Bar, CA (142) 13 mi49 min 52°F6 ft
TIBC1 - Tiburon Pier, San Francisco Bay, CA 15 mi38 min Calm 51°F 1017 hPa
RTYC1 - 9414523 - Redwood City, CA 16 mi49 min W 15 G 18 51°F 60°F1018.8 hPa (+0.0)
PPXC1 - 9414847 - Richmond (Point Potrero), CA 16 mi49 min WNW 5.1 G 6 55°F 1017.6 hPa (-0.3)
RCMC1 - 9414863 - Richmond, CA 17 mi49 min NW 5.1 G 7 54°F 55°F1017.3 hPa (+0.0)
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 23 mi29 min WNW 14 G 19 51°F1018.6 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 27 mi49 min W 7 G 11 54°F 1017 hPa (-0.0)
UPBC1 29 mi49 min WNW 13 G 15
MZXC1 - 9415102 - Martinez-Amorco CA 29 mi49 min W 11 G 12 54°F 55°F1017 hPa (-0.0)
CQUC1 29 mi30 min 55°F
PCOC1 - 9415144 - Port Chicago, CA 33 mi49 min WSW 6 G 11 54°F 55°F1016.7 hPa (-0.0)
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 33 mi29 min NW 16 G 19 49°F 1019.3 hPa42°F
PRYC1 - 9415020 - Point Reyes, CA 37 mi49 min 53°F1018.3 hPa (-0.6)
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 38 mi49 min W 4.1 G 8.9 56°F 1016.4 hPa (-0.0)
SFXC1 - San Francisco Bay Reserve, CA 42 mi64 min W 4.1 52°F 1017 hPa43°F

Wind History for Alameda, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Francisco, San Francisco International Airport, CA5 mi53 minW 1410.00 miA Few Clouds52°F42°F69%1018 hPa
Oakland, Metro Oakland International Airport, CA11 mi56 minW 1310.00 miA Few Clouds55°F43°F64%1018 hPa
Half Moon Bay Airport, CA12 mi54 minNW 77.00 miLight Rain48°F41°F76%1019 hPa
San Carlos Airport, CA14 mi53 minSW 1010.00 miClear50°F41°F71%1018.6 hPa
Hayward, Hayward Air Terminal, CA16 mi55 minW 510.00 miFair51°F41°F69%1019 hPa
Palo Alto Airport, CA21 mi62 minWNW 510.00 miClear50°F41°F71%1017.9 hPa

Link to 5 minute data for KSFO

Wind History from SFO (wind in knots)
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Last 24hrW20W16W13W11W10NW4W3W6W5W3NW7W4W3CalmN55W16W11W14W11W15W14W13W14
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W3W9W16NW7NW6CalmW6NW5CalmNE3NE3NW10W12W14W15W16W20W16W17
2 days agoSE5SW4CalmSW4SW3SW3CalmS4S10CalmS3SW3CalmE3E5E5E5NE5NE6SW14SW10SW14S19SW14

Tide / Current Tables for Oyster Point Marina, San Francisco Bay, California (2)
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Oyster Point Marina
Click for Map
Sun -- 12:55 AM PST     3.18 feet Low Tide
Sun -- 02:54 AM PST     Moonrise
Sun -- 06:31 AM PST     Sunrise
Sun -- 06:47 AM PST     7.09 feet High Tide
Sun -- 12:26 PM PST     Moonset
Sun -- 02:00 PM PST     -0.13 feet Low Tide
Sun -- 06:09 PM PST     Sunset
Sun -- 09:11 PM PST     5.36 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.43.23.54.25.26.26.97.16.65.64.12.51.10.2-0.10.212.13.34.355.45.24.7

Tide / Current Tables for Sierra Point 1.3 mi ENE, South San Francisco Bay, California Current
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Sierra Point 1.3 mi ENE
Click for Map
Sun -- 01:14 AM PST     0.00 knots Slack
Sun -- 02:54 AM PST     Moonrise
Sun -- 04:10 AM PST     0.59 knots Max Flood
Sun -- 06:31 AM PST     Sunrise
Sun -- 06:59 AM PST     -0.00 knots Slack
Sun -- 10:42 AM PST     -1.23 knots Max Ebb
Sun -- 12:25 PM PST     Moonset
Sun -- 02:23 PM PST     0.01 knots Slack
Sun -- 05:53 PM PST     1.00 knots Max Flood
Sun -- 06:09 PM PST     Sunset
Sun -- 09:09 PM PST     -0.01 knots Slack
Sun -- 11:56 PM PST     -0.49 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.3-0.10.20.50.60.50.3-0-0.5-0.9-1.2-1.2-1.1-0.8-0.20.30.70.910.90.50.1-0.3-0.4

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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.
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