Sunday, July12, 2020
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Marine Weather and Tides
El Granada, 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 5:56AMSunset 8:34PM Saturday July 11, 2020 9:08 PM PDT (04:08 UTC) Moonrise 11:43PMMoonset 11:17AM Illumination 58% Phase: Waning Gibbous; Moon at 21 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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PZZ545 Coastal Waters From Point Reyes To Pigeon Point California Out To 10 Nm- 832 Pm Pdt Sat Jul 11 2020
.small craft advisory in effect until 9 pm pdt this evening...
Tonight..NW winds 15 to 25 kt with gusts up to 30 kt. Wind waves 4 to 5 ft. NW swell 5 to 7 ft at 8 seconds. SWell S up to 2 ft.
Sun..NW winds 20 to 30 kt with gusts up to 35 kt. Wind waves 3 to 4 ft. NW swell 5 to 7 ft at 8 seconds and S up to 2 ft at 16 seconds.
Sun night..NW winds 20 to 30 kt with gusts up to 35 kt. Wind waves 3 to 4 ft. NW swell 6 to 8 ft at 8 seconds and S up to 2 ft at 14 seconds.
Mon..W winds 5 to 15 kt. Wind waves 2 to 3 ft. NW swell 5 to 7 ft at 9 seconds and S up to 2 ft at 12 seconds.
Mon night..SW winds 5 to 15 kt. Wind waves 1 to 2 ft. NW swell 4 to 6 ft at 9 seconds and S up to 2 ft at 11 seconds.
Tue..S winds 5 to 15 kt. Wind waves 1 ft. NW swell 4 to 6 ft at 9 seconds and S up to 2 ft at 10 seconds.
Tue night..S winds 5 to 10 kt. Wind waves 1 ft. NW swell 3 to 5 ft at 9 seconds and S up to 2 ft at 10 seconds.
Wed..S winds up to 10 kt. Wind waves 1 ft. NW swell 3 to 5 ft and S up to 2 ft.
Thu..SW winds up to 10 kt. Wind waves 1 ft. NW swell 3 to 5 ft and S up to 2 ft.
...san francisco bar/fourfathom bank forecast..... In the deep water channel...seas 4 to 6 ft with dominate swell period of 8 seconds. Across the bar...seas 6 to 8 ft with dominate swell period of 8 seconds. Maximum ebb current of 1.5 kt at 10:55 pm Saturday and 1.5 kt at 10:49 am Sunday.
PZZ500 832 Pm Pdt Sat Jul 11 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Strong and locally gusty northwest winds will prevail across the coastal waters through Sunday and into Monday morning. These winds will generate steep fresh swell which will result in hazardous conditions for small craft vessels in the coastal waters. A longer period south swell will be mixed in with the steep fresh northwest 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 112344 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 444 PM PDT Sat Jul 11 2020

SYNOPSIS. High pressure will dominate the weather pattern over the region this weekend resulting in very warm temperatures across the interior. Continued onshore flow will keep conditions near the coast cooler, yet still mild. A subtle cooling trend is on track to occur early next week.

DISCUSSION. as of 02:02 PM PDT Saturday . Marine layer has become nearly non-existent with the remainder of it having either dissipated over the Monterey Peninsula or traveled down to coastal southern Monterey county. Diurnal heating has resulted in temps up in the low-to-mid-90s around the East Bay, with locations within the Livermore Valley reporting temps between 92-97 F. A fire broke out due east of San Jose earlier today, where southwest winds and temps between 85-95 F have been prevalent. Thankfully, winds have remained light at 3-8 mph with gusts of 13 mph in that area, and the fire is fully contained at the time of this discussion's release. Similarly, low-to-mid RH values coupled with high temperatures can be found in other locations across the CWA, including interior portions of Monterey and San Benito counties and patches of the North Bay interior. Warm conditions and RH values in the 20s and low 30s are expected across that area going into the evening, with some isolated locations likely to record RH values in the teens. Thankfully, winds will remain light due to the upper-level ridge set up, but fire concerns will persist through tonight and going into Sunday.

The main focus for tonight's conditions will be the warmth and the low RH values across the interior. Minimum temps across several high-elevation locations remained fairly warm last night, with several sites along the East Hills reporting low-70s. We should expect for similar poor temperature recoveries across the interior tonight, along with poor humidity recoveries as the ridge reaches its maximum extent during the overnight hours and into early Sunday morning.

Sunday will be our warmest day across the CWA, with mild conditions dominating coastal areas tomorrow as the marine layer remains compressed and allows for greater diurnal heating. Temps along the coast will fall within the 65-75 F range. The interior is progged for much higher temps ranging from 95-100, with some isolated locations getting into the low 100s. Weak onshore flow is to be expected tomorrow as well, which will help to mitigate fire weather concerns. Models are suggesting that the stable conditions from the upper-level ridge will result in weak offshore flow. Nevertheless, the poor humidity recoveries along with warm mins overnight will still result in elevated fire weather and heat concerns for the day.

Looking ahead into next week, heights will fall across the CWA as the upper-level ridge weakens and allows for the intrusion of a disturbance off the Pacific into BC. Troughing will gradually become the more dominating upper-level pattern during the first half of next week, allowing for temperatures will return closer to seasonal averages. This disturbance will also allow for the marine layer to recover, bringing coastal locations back to more seasonal conditions as well. Expect the main setup for next week to be the cooling pattern as we see the gradual shift in our upper-level setup as the ridge weakens and makes its way out of the southwest as this trough takes over.

AVIATION. as of 4:42 PM PDT Saturday . for 00z TAFs. VFR, with breezy northwesterly winds, and the occasional stronger gusts. Large scale weather pattern remains in place, so forecast is very similar to last night featuring a compressed marine layer with a few clouds along the coast and bayshore, but otherwise VFR and light onshore winds. Chance for thicker low clouds near the Monterey Peninsula. Sunday is forecast for VFR with breezier onshore winds in the afternoon.

Vicinity of KSFO . VFR. Winds remain northwesterly around 20 kts and the chance of a few stronger gusts will persist through the early evening. Winds will dial back but remain breezy overnight. A few clouds near the terminal overnight, but forecast to remain VFR through the TAF period. Winds are once again expected to be strong in the afternoon and out of the northwest.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . Northerly winds are breezy with VFR conditions. Most of tonight will be VFR but lower cigs may develop in the early morning hours for coastal terminals. Winds will ease overnight before picking up on Sunday. VFR is forecast with breezier onshore flow.

MARINE. as of 02:32 PM PDT Saturday . A robust northerly gradient will bring moderate to locally gusty northwest winds across the coastal waters through the weekend. These winds will generate steep fresh swell which will result in hazardous conditions for small craft vessels in the coastal waters. Locally moderate winds will also be present around Angel Island in the northern San Francisco Bay. Otherwise, a light longer period south swell will be mixed in with the steep fresh northwest swell.

MTR WATCHES/WARNINGS/ADVISORIES. Tngt. SCA . Pigeon Pt to Pt Pinos 0-10 nm 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 SCA . Pt Reyes to Pigeon Pt 0-10 nm until 9 PM



PUBLIC FORECAST: Diaz AVIATION: DK 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 mi50 min NW 11 G 13 73°F
46237 - San Francisco Bar, CA (142) 21 mi38 min 58°F5 ft
AAMC1 - 9414750 - Alameda, CA 21 mi50 min W 4.1 G 6
FTPC1 - 9414290 - San Francisco, CA 21 mi50 min WSW 9.9 G 18
PXSC1 21 mi50 min 63°F 53°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 21 mi50 min S 4.1 G 5.1 63°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 22 mi50 min SW 6 G 8
OBXC1 22 mi50 min 65°F 55°F
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 23 mi28 min NNW 18 G 23 56°F 1016.5 hPa53°F
LNDC1 23 mi50 min W 5.1 G 7 66°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 23 mi50 min NNW 2.9 G 4.1 64°F
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 26 mi28 min NW 18 G 21 54°F 54°F1015.7 hPa51°F
TIBC1 - Tiburon Pier, San Francisco Bay, CA 27 mi40 min SSE 4.1 65°F 1014 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 29 mi56 min S 15 G 18 61°F
RCMC1 - 9414863 - Richmond, CA 29 mi50 min S 8 G 9.9
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 40 mi50 min WSW 8.9 G 9.9 75°F
MZXC1 - 9415102 - Martinez-Amorco CA 41 mi50 min WNW 16 G 17 82°F
UPBC1 42 mi50 min WNW 18 G 20
PCOC1 - 9415144 - Port Chicago, CA 45 mi50 min WSW 11 G 13 80°F
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 49 mi50 min WNW 9.9 G 12 82°F

Wind History for Redwood City, CA
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Half Moon Bay Airport, CA1 mi68 minNW 85.00 miFair with Haze57°F51°F82%1016.6 hPa
San Francisco, San Francisco International Airport, CA10 mi72 minNW 1410.00 miFair64°F50°F60%1014.5 hPa
San Carlos Airport, CA12 mi70 minWSW 910.00 miClear75°F42°F31%1014.9 hPa
Oakland, Metro Oakland International Airport, CA20 mi75 minW 1310.00 miFair69°F54°F59%1014.7 hPa
Hayward, Hayward Air Terminal, CA22 mi74 minSW 410.00 miFair69°F54°F59%1015.5 hPa

Link to 5 minute data for KSFO

Wind History from SFO (wind in knots)
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1 day agoW24NW15NW18NW18NW15NW16NW13NW14NW11NW9NW7NW12NW11NW13NW13NW15NW15NW17NW16NW17NW17NW15NW16NW18
2 days agoW14W14W12W11NW3NW5NW5NW6NW6NW5NW3CalmNE4NE5NE4NW10NW12NW16NW21NW21NW20NW20NW22
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Tide / Current Tables for Princeton, Half Moon Bay, California
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for San Mateo Bridge, South San Francisco Bay, California Current
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San Mateo Bridge
Click for Map
Sun -- 12:41 AM PDT     Moonrise
Sun -- 01:53 AM PDT     0.00 knots Slack
Sun -- 04:10 AM PDT     0.77 knots Max Flood
Sun -- 05:58 AM PDT     Sunrise
Sun -- 07:20 AM PDT     -0.00 knots Slack
Sun -- 10:26 AM PDT     -0.98 knots Max Ebb
Sun -- 01:12 PM PDT     Moonset
Sun -- 01:44 PM PDT     0.00 knots Slack
Sun -- 04:31 PM PDT     Last Quarter
Sun -- 04:36 PM PDT     1.14 knots Max Flood
Sun -- 08:09 PM PDT     -0.00 knots Slack
Sun -- 08:31 PM PDT     Sunset
Sun -- 11:12 PM PDT     -1.02 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.7-0.40.10.50.80.70.50.2-0.3-0.7-1-0.9-0.6-0.30.10.71.11.110.60.1-0.4-0.8-1

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.
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Wind Forecast for San Francisco/Monterey Bay Area, CA (0,6,7,8)
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Ground Weather Radar Station San Francisco Bay Area, CA
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