Tuesday, August4, 2020
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Marine Weather and Tides
Marina, 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 6:14AMSunset 8:12PM Monday August 3, 2020 11:12 PM PDT (06:12 UTC) Moonrise 7:43PMMoonset 5:05AM Illumination 100% Phase: Full Moon; Moon at 15 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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PZZ535 Monterey Bay- 911 Pm Pdt Mon Aug 3 2020
.small craft advisory in effect from Tuesday afternoon through Tuesday evening...
Tonight..W winds 10 to 20 kt, diminishing to 5 to 15 kt after midnight. Wind waves 4 to 5 ft, decreasing to 1 to 2 ft after midnight. W swell 4 to 6 ft at 8 seconds.
Tue..W winds 10 to 20 kt...becoming 15 to 25 kt with gusts up to 30 kt in the afternoon. Wind waves 3 to 4 ft. W swell 3 to 5 ft at 8 seconds.
Tue night..W winds 10 to 20 kt with gusts up to 25 kt. Wind waves 2 to 3 ft. W swell 3 to 5 ft at 8 seconds.
Wed..W winds 10 to 20 kt with gusts up to 25 kt. Wind waves 3 to 4 ft. W swell 3 to 5 ft at 8 seconds. A slight chance of rain.
Wed night..W winds 5 to 15 kt. Wind waves 1 to 2 ft. W swell 3 to 5 ft at 8 seconds.
Thu..W winds 20 to 30 kt with gusts up to 35 kt. Wind waves 4 to 5 ft. W swell 2 to 4 ft.
Fri..W winds 5 to 15 kt. Wind waves 1 to 2 ft. W swell 2 to 4 ft. Locally lower winds and seas across sheltered portions of the bay.
PZZ500 911 Pm Pdt Mon Aug 3 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Moderately strong and gusty northwesterly winds will continue into the latter part of the week over much of the coastal waters as high pressure remains over the eastern pacific. The strongest winds will be along the immediate coastline south of point sur and north of point reyes. Breezy onshore winds are also expected in the afternoons and evenings over the bays. These winds will generate steep fresh swells resulting in locally hazardous seas, especially for smaller vessels.


7 Day Forecast for Marine Location Near Marina, CA
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location: 36.7, -121.86     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 040354 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 854 PM PDT Mon Aug 3 2020

SYNOPSIS. Very warm conditions this afternoon will give way to significant cooling on Tuesday and Wednesday, as an upper trough deepens over California. Light rain or drizzle is likely near the coast and in the coastal hills on Tuesday night through Wednesday morning, when measurable precipitation is possible. In addition, breezy conditions will develop at times through Wednesday, with locally gusty winds likely Tuesday afternoon and evening as strong onshore flow develops. Modest warming is forecast late in the week, but temperatures will only bounce back to near seasonal averages.

DISCUSSION. As of 8:55 PM PDT Monday . Visible satellite imagery depicts low clouds hanging over northwestern Marin County and the SF Peninsula but struggling to move more inland. Along the Central Coast, visible satellite also depicted the development of standing wave clouds over the Monterey Peninsula, owing to low- stratus attempting to interact with the coast. The Fort Ord Profiler still shows a marine layer depth at just over 1000 ft this evening as a result of the influence from the upper- level ridge setup across the Desert Southwest. These conditions are expected to change sharply overnight as the first of two low- pressure systems make their way into our CWA; the first disturbance is gradually moving east towards our CWA this evening and heights have already begun falling, with the SFO-ACV gradient set at 5 hpa as of 02Z.

The two key impacts tonight from this disturbance will be isolated gusty conditions and coastal drizzle: SFO already reported a gust of 41 mph earlier this afternoon, with gusts in the mid-30s reported at other sites this afternoon. Winds have begun to settle down, but we are expecting breezy conditions along gaps, passes, and ridge tops through tonight, with gusts up to 40 mph possible in some isolated locations. Due to the receding winds, we do not think we will need a wind advisory, but it will be something to watch as this disturbance continues to make its way ashore. As for the second key impact, the influence from this disturbance will soon outweigh the influence from the high pressure over the Southwest, especially as it moves inland. As such, we cannot rule out the possibility for some mist along the coast as the marine layer deepens overnight.

Following this first disturbance, a secondary shortwave will detach itself from the larger upper-level trough over the Gulf of Alaska and take aim at our CWA Tuesday afternoon. As it does so, the marine layer is progged to deepen through Tuesday afternoon and Wednesday, with the latest model guidance suggesting that we may see some moderate drizzle along the coast, with accumulations ranging in the low hundredths of an inch at most. We will have to see how the marine layer evolves as this second disturbance comes ashore tomorrow and through the middle of the week. High confidence in max temps being much cooler than today's across the CWA, with the interior expected to be 6 to 8 degrees F cooler than today, and coastal locations around 3 to 5 degrees F cooler. This cooling trend will continue through the middle of the week as the second disturbance lingers over our region.

Looking ahead through the second half of the week and the weekend, models guidance currently suggests that the secondary disturbance will linger over the region while the center of the Southwest high pressure system continues to gradually move east into West Texas. As such, this secondary disturbance seems progged to be a major player on our overall setup through the rest of the period, although models do also suggest for a warming and drying trend to begin by Thursday and go through Sunday as well, owing to the gradual weakening of the disturbance. Nevertheless, do not expect max temps to recover to what we observed today and instead are expecting them to struggle to get back to seasonal averages through the period.

AVIATION. As of 5:45 PM PDT Monday . For 00z tafs. VFR conditions prevail at all terminals late this afternoon, with marine stratus largely confined to areas near the coast from San Mateo County northward. The marine layer remains pretty shallow, with the 00Z KOAK sounding and Bodega Bay and Fort Ord profilers all indicating a depth of about 1000 ft. Onshore winds are stronger than usual, with the pressure gradient from KSFO to KSAC having now increased to 4.2 mb.

Key question for tonight is degree of return of the marine stratus and timing of onset of ceilings. Models and guidance project it becoming widespread during the overnight hours, but confidence is diminished by magnitude of north to south pressure gradient continuing higher than model forecasts. For current set of TAFs have gone with an intermediate solution, not as early or as extensive as the models/guidance but with MVFR ceilings just above IFR heights becoming widespread around the Bays and locally farther inland late this evening and overnight.

Vicinity of KSFO . Latest webcam images show stratus trying to work its way in through the San Bruno Gap, but believe combination of relatively shallow depth of the marine layer and gradually diminishing onshore winds during the evening will keep it from reaching the terminal. Borderline call as to ceilings developing during the late night and morning hours and so have compromised with a TEMPO from 12Z to 16Z. Strong onshore winds which gusted as high as 35 kt during the late afternoon should begin tapering off during the next couple of hours.

SFO Bridge Approach . Similar to SFO.

Monterey Bay Terminals . VFR conditions through the first part of the evening, then Low confidence on timing of overnight stratus development. Higher confidence that ceilings will ultimately develop though and then continue into Tuesday morning.

MARINE. as of 08:18 AM PDT Monday . Gusty northwesterly winds will continue through early next week across the coastal waters as high pressure remains over the eastern Pacific. The strongest winds will be along the immediate coastline south of Point Sur and north of Point Reyes. Breezy onshore winds are also expected in the afternoons and evenings over the bays. These winds will generate steep fresh swell resulting in hazardous seas conditions, especially for smaller vessels.

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



PUBLIC FORECAST: Diaz/MM AVIATION: Blier MARINE: AS

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MEYC1 7 mi96 min WSW 5.1 G 9.9 58°F 63°F1018.1 hPa
MLSC1 - Moss Landing, South Harbor, CA 8 mi37 min ESE 7 G 20 58°F 1016.7 hPa56°F
46092 - MBM1 10 mi63 min NW 16 57°F 54°F1016.5 hPa (+1.7)
ELXC1 - Elkhorn Slough Reserve, CA 10 mi87 min SSE 8 59°F 58°F
46114 - West Monterey Bay, CA 26 mi46 min 56°F6 ft
46239 - Point Sur, CA (157) 28 mi46 min 58°F6 ft
46042 - MONTEREY - 27NM West of Monterey Bay, CA 29 mi32 min NNW 14 G 18 58°F 56°F1017.5 hPa58°F

Wind History for Monterey, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Monterey Regional Airport, CA8 mi78 minWSW 710.00 miOvercast65°F57°F76%1019.5 hPa
Salinas, Salinas Municipal Airport, CA14 mi79 minWNW 1110.00 miOvercast64°F55°F75%1018.4 hPa
Watsonville, Watsonville Municipal Airport, CA17 mi79 minESE 510.00 miFair59°F55°F90%1017.1 hPa

Link to 5 minute data for KMRY

Wind History from MRY (wind in knots)
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Last 24hrW33SW4S3SW4SW4Calm4CalmNW9W9NW9N8NW7NW11W10NW8W11
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2 days ago4SW4NW6W5SW4S4W6W6W6W5W8NW6NW9N8N8NW9NW10NW9NW9NW6W9W7W7W5

Tide / Current Tables for Monterey, Monterey Harbor, California (3)
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Monterey
Click for Map
Tue -- 06:00 AM PDT     -0.63 feet Low Tide
Tue -- 06:16 AM PDT     Sunrise
Tue -- 07:07 AM PDT     Moonset
Tue -- 12:50 PM PDT     4.62 feet High Tide
Tue -- 05:58 PM PDT     2.63 feet Low Tide
Tue -- 08:10 PM PDT     Sunset
Tue -- 09:17 PM PDT     Moonrise
Tue -- 11:37 PM PDT     5.66 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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5.64.73.31.80.5-0.3-0.6-0.30.41.42.63.74.44.64.43.83.22.82.62.93.54.255.5

Tide / Current Tables for Point Pinos, California Current
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Point Pinos
Click for Map
Tue -- 12:57 AM PDT     -0.00 knots Slack
Tue -- 04:13 AM PDT     -1.00 knots Max Ebb
Tue -- 06:16 AM PDT     Sunrise
Tue -- 07:07 AM PDT     Moonset
Tue -- 08:08 AM PDT     0.00 knots Slack
Tue -- 11:13 AM PDT     0.80 knots Max Flood
Tue -- 02:25 PM PDT     -0.00 knots Slack
Tue -- 04:47 PM PDT     -0.52 knots Max Ebb
Tue -- 08:03 PM PDT     0.00 knots Slack
Tue -- 08:10 PM PDT     Sunset
Tue -- 09:17 PM PDT     Moonrise
Tue -- 10:51 PM PDT     0.59 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.3-0-0.5-0.8-1-0.9-0.8-0.5-0.10.40.70.80.80.50.2-0.2-0.5-0.5-0.4-0.3-00.30.50.6

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 (2,6,7,8)
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Ground Weather Radar Station San Francisco Bay Area, CA
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