Sunday, April18, 2021
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Marine Weather and Tides
El Granada, 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 6:29AMSunset 7:48PM Saturday April 17, 2021 11:07 PM PDT (06:07 UTC) Moonrise 8:57AMMoonset 12:00AM Illumination 37% Phase: Waxing Crescent; Moon at 6 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- 851 Pm Pdt Sat Apr 17 2021
Tonight..NW winds 10 to 20 kt with gusts up to 25 kt.
Sun..NW winds 5 to 15 kt with gusts up to 25 kt.
Sun night..W winds 5 to 15 kt with gusts up to 25 kt.
Mon..W winds 5 to 15 kt.
Mon night..W winds 5 to 15 kt with gusts up to 25 kt.
Tue..W winds 15 to 25 kt with gusts up to 30 kt.
Wed..W winds 5 to 15 kt.
PZZ500 851 Pm Pdt Sat Apr 17 2021
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... In the outer waters, breezy northwest winds continue across the waters. Gusty coastal jets should return by Sunday afternoon south of point arena, pigeon point, and point sur. Then, stronger northwest winds will persist north of point reyes and the farallones from late Sunday through mid week next week. Gale force gusts may be possible in the northern waters by late Monday. These stronger winds will produce steep to very steep wind waves and hazardous conditions for smaller vessels. A moderate northwest swell prevails through the period with a smaller longer period southerly swell.


7 Day Forecast for Marine Location Near El Granada, CA
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location: 37.5, -122.48     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 180532 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 1032 PM PDT Sat Apr 17 2021

SYNOPSIS. Warmer temperatures expected on Sunday as ridging aloft continues. Slight cooling begins Monday, mainly in coastal areas. More widespread cooling is forecast for Tuesday as temperatures return to seasonal averages. Rain is not expected through Friday.

DISCUSSION. as of 08:58 PM PDT Saturday . It was another warm day with plenty of sunshine for most of our CWA except some of the coastal areas that had marine stratus hovering nearby. Daytime highs today were generally in the 60s closer to the coast with 70s to low 80s inland. Models still show that the airmass aloft will continue to warm on Sunday as the high pressure ridge axis moves directly over the West Coast tomorrow. That will cause Sunday to be our hottest day in this current above normal warming event. Many inland areas will have widespread 80s (some nearing 90) while areas along and near the coast warm into the upper 60s to upper 70s. The deterministic and ensemble models have all been in good agreement that Sunday will be the peak of this event followed by just some slight cooling on Monday with more significant cooling on Tuesday. For Tuesday and Wednesday, expect daytime highs region-wide to be much closer to seasonal.

A look at the current nighttime satellite imagery shows fairly clear skies over our CWA with the exceptions of some marine stratus along the Marin County coast and Point Reyes, along the SF Peninsula, and in the southern portion of the Monterey Bay wrapping around Point Pinos. No changes made this evening to the forecast package . see previous discussion below for details.

PREV DISCUSSION. as of 12:59 PM PDT Saturday . Light to locally moderate offshore flow is still projected for tonight. The most notable locations will be over the N Bay Mts and E Bay Hills with mild temperatures, lower RH, and breezy to gusty NE winds. The offshore flow combined with building 500 mb heights will help to suppress the marine layer with clouds confined closer to the coast.

An upper level ridge currently to the west will build over the region on Sunday. Continued offshore flow with building high pressure will lead to another mild afternoon, especially across the interior. Expecting Sunday to be a touch warmer than today, but by only a few degrees. 80s and possibly approaching 90 across the interior will be possible on Sunday. As noted on the previous discussion, the challenge/lower confidence portion of the forecast will be the transition from the interior to the coast temp wise. Hi-res models still show a seabreeze on Sunday, which will keep warmer temperature potential lower. Any brief pause in the seabreeze or burst of offshore flow will result in a quick uptick of temperatures.

The warmer weather and ridge of high pressure will end on Monday as a disturbance begins to develop off the PacNW Coast. Further cooling is expected on Tuesday with increasing night/morning clouds. Aforementioned mentioned disturbance develops into an upper low and takes aim at NorCal late Tuesday and down the Sierra on Wednesday. Models have been hinting at a few showers possible, but these showers are most likely N and E of the Bay Area. Forecast will remain dry for now.

Speaking of precip, much needed precip may arrive late in the week and next weekend. Confidence is increasing that a storm system will bring some precip to NorCal and possibly into the Bay Area late Friday/Saturday. There is a definitely some spread between the deterministic and ensemble weather models. It doesn't look overly promising, but will at least carry a slight chance for showers in the North Bay. Much farther down the road all eyes turn to the west as a typhoon in the WPAC makes its march eastward. Really long range models show some moisture traversing the Pacific and reaching the West Coast by the end of the month. Stay tuned .

AVIATION. As of 10:32 PM PDT Saturday . For the 06Z TAFs. Satellite imagery shows patches of stratus along the San Mateo Coast and southward through the Monterey Bay. Low clouds have retreated from the Monterey Peninsula this evening leaving VFR conditions at all terminals. VFR conditions to prevail through the period north of the Monterey Bay with a chance of low clouds re-filling in overnight at the Monterey taf sites. Offshore flow aloft around 25 kt into late tonight around the North/East Bay may lead to some light LLWS before those winds diminish around sunrise. Breezy onshore winds have lingered around the SF Bay Area this evening but are expected to diminish overnight. Generally light winds overnight before onshore winds increase tomorrow afternoon to around 10-15 kt.

Vicinity of KSFO . VFR with some low clouds lingering along the western end of the SF Peninsula. VFR conditions to prevail through the period. Breezy onshore winds continue this evening at around 10-15 kt but are expected to diminish overnight. Onshore winds will increase again tomorrow afternoon to around 15-20 kt.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . VFR currently, though satellite shows low clouds remain over portions of the Bay and just north of the Peninsula. Low clouds are expected to move in again overnight with IFR/LIFR conditions until about 14z/15z. Will keep an eye on satellite and obs overnight and update the tafs as needed. W/NW winds will diminish overnight before returning in the afternoon.

MARINE. as of 08:58 PM PDT Saturday . In the outer waters, breezy northwest winds continue across the waters. Gusty coastal jets should return by Sunday afternoon south of Point Arena, Pigeon Point, and Point Sur. Then, stronger northwest winds will persist north of Point Reyes and the Farallones from late Sunday through mid week next week. Gale force gusts may be possible in the northern waters by late Monday. These stronger winds will produce steep to very steep wind waves and hazardous conditions for smaller vessels. A moderate northwest swell prevails through the period with a smaller longer period southerly swell.

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



PUBLIC FORECAST: Bingaman/MM AVIATION: AS 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 14 mi49 min WNW 5.1 G 5.1 54°F 1019.2 hPa
46237 - San Francisco Bar, CA (142) 21 mi37 min 52°F5 ft
AAMC1 - 9414750 - Alameda, CA 21 mi49 min SW 2.9 G 7 55°F 63°F1018.8 hPa
PXSC1 21 mi49 min 53°F
FTPC1 - 9414290 - San Francisco, CA 21 mi49 min SW 6 G 12 50°F 56°F1018.4 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 21 mi49 min S 1.9 G 2.9 53°F 1017.4 hPa
OBXC1 22 mi49 min 55°F 49°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 22 mi49 min S 4.1 G 4.1
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 23 mi27 min NNW 12 G 16 50°F 1019.7 hPa48°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 23 mi49 min W 1.9 G 2.9 54°F 1018.5 hPa
LNDC1 23 mi49 min NE 1.9 G 2.9 55°F 1018.4 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 26 mi27 min NW 18 G 21 51°F1019.2 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 29 mi49 min SSW 8 G 11 54°F 1018.6 hPa
RCMC1 - 9414863 - Richmond, CA 29 mi55 min E 4.1 G 6 57°F 59°F1018.1 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 40 mi49 min WNW 7 G 9.9 58°F 1017.9 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 41 mi49 min WNW 12 G 14 60°F 60°F1017.8 hPa
UPBC1 42 mi49 min WNW 13 G 17
PRYC1 - 9415020 - Point Reyes, CA 43 mi49 min 52°F1019.5 hPa
PCOC1 - 9415144 - Port Chicago, CA 45 mi49 min SW 9.9 G 12 60°F 61°F1017.4 hPa
46269 46 mi37 min 51°F 54°F3 ft
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 49 mi49 min WNW 11 G 12 67°F 1016.9 hPa

Wind History for Redwood City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Half Moon Bay Airport, CA1 mi72 minNNW 44.00 miLight Rain48°F46°F94%1019.3 hPa
San Francisco, San Francisco International Airport, CA10 mi71 minNW 1310.00 miA Few Clouds52°F46°F80%1018.1 hPa
San Carlos Airport, CA12 mi72 minWNW 310.00 miFair55°F46°F72%1019 hPa
Palo Alto Airport, CA19 mi2.3 hrsNW 610.00 miClear55°F46°F72%1017.9 hPa
Oakland, Metro Oakland International Airport, CA20 mi74 minW 410.00 miA Few Clouds54°F48°F80%1018.4 hPa
Hayward, Hayward Air Terminal, CA22 mi73 minN 010.00 miFair55°F48°F77%1019.2 hPa

Link to 5 minute data for KHAF

Wind History from HAF (wind in knots)
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2 days agoCalmCalmSE6SE5SE5CalmE4NE5CalmSE6SE5S7SW8S5W7W7W6N7NW6NW4NW5NW7NW7NW4

Tide / Current Tables for Half Moon Bay, California
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Half Moon Bay
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Sun -- 01:16 AM PDT     Moonset
Sun -- 02:24 AM PDT     4.65 feet High Tide
Sun -- 06:30 AM PDT     Sunrise
Sun -- 09:52 AM PDT     0.17 feet Low Tide
Sun -- 10:46 AM PDT     Moonrise
Sun -- 05:51 PM PDT     3.62 feet High Tide
Sun -- 07:48 PM PDT     Sunset
Sun -- 10:02 PM PDT     3.43 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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44.44.64.64.23.52.61.60.80.30.20.40.91.52.12.83.23.53.63.63.53.53.43.5

Tide / Current Tables for San Mateo Bridge, South San Francisco Bay, California Current
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San Mateo Bridge
Click for Map
Sun -- 01:16 AM PDT     Moonset
Sun -- 02:39 AM PDT     0.59 knots Max Flood
Sun -- 05:17 AM PDT     -0.00 knots Slack
Sun -- 06:29 AM PDT     Sunrise
Sun -- 09:36 AM PDT     -1.32 knots Max Ebb
Sun -- 10:44 AM PDT     Moonrise
Sun -- 01:15 PM PDT     0.00 knots Slack
Sun -- 04:10 PM PDT     1.09 knots Max Flood
Sun -- 07:47 PM PDT     Sunset
Sun -- 08:13 PM PDT     -0.00 knots Slack
Sun -- 10:23 PM PDT     -0.45 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.10.30.50.60.40.1-0.2-0.6-1-1.3-1.3-1-0.5-0.10.40.91.110.90.60.1-0.2-0.4-0.4

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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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