Saturday, July4, 2020
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Marine Weather and Tides
La Selva Beach, 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 5:51AMSunset 8:31PM Friday July 3, 2020 11:35 PM PDT (06:35 UTC) Moonrise 6:28PMMoonset 3:24AM Illumination 98% Phase: Waxing Gibbous; Moon at 13 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- 932 Pm Pdt Fri Jul 3 2020
.small craft advisory in effect from Saturday morning through Saturday evening...
.small craft advisory in effect from Sunday morning through Sunday evening...
Tonight..SW winds 10 to 20 kt, becoming nw up to 10 kt after midnight. Wind waves 2 to 3 ft. W swell 3 to 5 ft at 9 seconds and sw 2 to 3 ft at 18 seconds. Patchy fog after midnight. Patchy drizzle after midnight.
Independence day..W winds 10 to 20 kt with gusts up to 30 kt. Wind waves 2 to 3 ft. W swell 3 to 5 ft at 9 seconds and sw 2 to 3 ft at 18 seconds. Patchy fog. Patchy drizzle.
Sat night..W winds 10 to 20 kt with gusts up to 25 kt. Wind waves 2 to 3 ft. W swell 4 to 6 ft at 9 seconds and sw 2 to 3 ft at 17 seconds.
Sun..W winds 15 to 25 kt with gusts up to 30 kt. Wind waves 3 to 4 ft. W swell 4 to 6 ft at 8 seconds and sw 2 to 3 ft at 16 seconds.
Sun night..NW winds 15 to 25 kt with gusts up to 30 kt. Wind waves 3 to 4 ft. W swell 4 to 6 ft at 8 seconds and sw 2 to 3 ft at 16 seconds.
Mon..W winds 20 to 30 kt with gusts up to 35 kt. Wind waves 2 to 3 ft. W swell 3 to 5 ft at 8 seconds and sw 2 to 3 ft at 15 seconds.
Mon night..NW winds 5 to 15 kt. Wind waves 2 to 3 ft. W swell 3 to 5 ft at 8 seconds and sw around 2 ft at 15 seconds.
Tue..NW winds 10 to 20 kt. Wind waves 2 to 3 ft. W swell 3 to 5 ft and S around 2 ft.
Wed..NW winds 5 to 15 kt. Wind waves 1 to 2 ft. W swell 2 to 4 ft and S around 2 ft. Locally lower winds and seas across sheltered portions of the bay.
PZZ500 932 Pm Pdt Fri Jul 3 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Surface high pressure will build over the coastal waters resulting in moderate to strong northwest winds through the holiday weekend. These winds will generate steep fresh swell resulting in hazardous seas conditions, particularly for smaller vessels. A long-period southerly swell train will persist through the weekend. This will cause occasional breaking waves over nearshore shoals and strong currents along the coast, especially near points and headlands.


7 Day Forecast for Marine Location Near La Selva Beach, CA
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location: 36.93, -121.85     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 040501 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 1001 PM PDT Fri Jul 3 2020

SYNOPSIS. High pressure builds Saturday and Sunday with a warming trend for inland areas as the marine layer mixes out. The ridge breaks down early next week as a dry trough passes through bringing a return of onshore winds. Low forecast confidence in the long range with regards to the intensity of the upper-level ridge over much of the West heading into next weekend.

DISCUSSION. as of 9:20 PM PDT Friday . Visible satellite imagery has shown the gradual compression of the marine layer over the course of the afternoon and early evening hours. Our current upper-level setup is composed of both a 590dm 500mb ridge which has gradually settled over New Mexico and a weak 568dm 500mb trough that is roughly centered over British Columbia. Winds aloft have remained relatively west/southwesterly owing to the ridge while surface winds have remained north/northwesterly across most of the CWA. This setup is diminishing the marine layer from two sides as dry, northerly winds descend over the CWA and the ridge aloft continues to introduce warm, dry air into the boundary layer along the coast. As a result, confidence in there not being drizzle this evening and overnight is high and thus we can remove it from our forecast. However we cannot rule out the possibility for some localized fog along patches of the coast.

Looking ahead into tomorrow (Independence Day) we see short-term model agreement that the marine layer will likely compress further through midday for the same reasons as today's upper- level setup. The added clearing will result in warmer temperatures along the coast and especially in the interior. Many areas across the interior are expected to be 6 to 10 degrees above normal with afternoon highs expected to get into the mid to low 90s. In terms of relative humidity, there is high agreement that RH values will fall within the 15-25% range across the interior as well. The culmination of these conditions and the 4th of July festivities will result in an elevated fire concern as previously stated in the afternoon discussion. Please be mindful of these conditions and avoid activities which may ignite wildfires. By Sunday we can expect for northerly flow associated with the weak upper-level trough to bring in cooler conditions, especially for the interior.

By early next week, the same low pressure system over us now remains locked in place over Alberta and will have an opportunity to regain control of our weather pattern Monday night into Tuesday. There is currently model disagreement, primarily between the ECMWF and the GFS, as to whether or not the upper-level ridge will attempt to backbuild into the state from the desert southwest late in the week to next weekend. The upper ridge's intensity will subsequently impact the cooling trend and how quickly the marine layer will rebound next week.

AVIATION. As of 10:01 PM PDT Friday . For 06Z TAFs. The marine layer varies from 1,000 to 1,200 feet deep. Increasing lower to mid level ridging will compress the marine layer through the period keeping VFR going except for patchy VLIFR-IFR along the immediate coastline. Drier air transporting in from the northwest during the day Saturday will likely keep VFR going into the 4th of July evening.

Vicinity of KSFO . VFR, west wind near 10 knots tonight and Saturday morning. West wind increasing again to 25 knots Saturday afternoon and evening.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . VFR except patchy IFR along the coast this evening, increasing VLIFR-IFR tonight and Saturday morning. VFR returning by late Saturday morning and afternoon. West winds 5 knots occasionally up to 10 knots tonight and Saturday morning. West to northwest winds 10 to 15 knots Saturday afternoon. Early to mid Saturday evening likely a similar scenario to this evening with VFR and patchy IFR.

MARINE. as of 9:48 PM PDT Friday . Surface high pressure will build over the coastal waters resulting in moderate to strong northwest winds through the holiday weekend. These winds will generate steep fresh swell resulting in hazardous seas conditions, particularly for smaller vessels. A long-period southerly swell train will persist through the weekend. This will cause occasional breaking waves over nearshore shoals and strong currents along the coast, especially near points and headlands.

MTR WATCHES/WARNINGS/ADVISORIES. Tngt. 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



PUBLIC FORECAST: Diaz/Dykema AVIATION/MARINE: Canepa

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MLSC1 - Moss Landing, South Harbor, CA 9 mi52 min S 4.1 G 8.9 56°F 1017.7 hPa53°F
ELXC1 - Elkhorn Slough Reserve, CA 10 mi51 min S 2.9 55°F 53°F
46092 - MBM1 16 mi127 min NW 14 57°F 58°F1016.6 hPa (-0.3)
46240 - Cabrillo Point, Monterey Bay, CA (158) 21 mi70 min 58°F3 ft
MEYC1 23 mi60 min W 6 G 8 55°F 61°F1017.8 hPa
46042 - MONTEREY - 27NM West of Monterey Bay, CA 31 mi36 min NW 16 G 21 56°F 1017.7 hPa53°F
46114 - West Monterey Bay, CA 31 mi40 min 56°F6 ft
46239 - Point Sur, CA (157) 43 mi40 min 57°F6 ft
RTYC1 - 9414523 - Redwood City, CA 44 mi48 min NNW 4.1 G 5.1 62°F 75°F1017.6 hPa

Wind History for Monterey, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Watsonville, Watsonville Municipal Airport, CA3 mi43 minN 09.00 miOvercast55°F53°F93%1017.7 hPa
Monterey Regional Airport, CA23 mi42 minWSW 39.00 miFair56°F52°F87%1019 hPa
Salinas, Salinas Municipal Airport, CA23 mi43 minNNW 77.00 miFair59°F52°F78%1018.2 hPa
Hollister, CA, CA23 mi41 minSW 510.00 miFair55°F50°F82%1017.6 hPa

Link to 5 minute data for KWVI

Wind History from WVI (wind in knots)
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Last 24hrCalmCalmCalmCalmN3Calm3CalmCalmCalm36W7SW7W8SW7SW7SW8SW7S8SW5S5SE5Calm
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Tide / Current Tables for Elkhorn Slough railroad bridge, California
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Elkhorn Slough railroad bridge
Click for Map
Sat -- 05:03 AM PDT     -1.28 feet Low Tide
Sat -- 05:15 AM PDT     Moonset
Sat -- 05:53 AM PDT     Sunrise
Sat -- 12:24 PM PDT     4.43 feet High Tide
Sat -- 04:42 PM PDT     2.65 feet Low Tide
Sat -- 08:28 PM PDT     Moonrise
Sat -- 08:29 PM PDT     Sunset
Sat -- 09:44 PM PDT     Full Moon
Sat -- 10:55 PM PDT     6.17 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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5.13.61.80.2-0.9-1.3-1-0.30.71.833.94.44.33.93.22.82.733.74.55.35.96.2

Tide / Current Tables for Point Pinos, California Current
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Point Pinos
Click for Map
Sat -- 02:58 AM PDT     -1.11 knots Max Ebb
Sat -- 05:17 AM PDT     Moonset
Sat -- 05:54 AM PDT     Sunrise
Sat -- 06:57 AM PDT     0.00 knots Slack
Sat -- 10:07 AM PDT     0.88 knots Max Flood
Sat -- 01:25 PM PDT     -0.00 knots Slack
Sat -- 03:41 PM PDT     -0.47 knots Max Ebb
Sat -- 06:45 PM PDT     0.00 knots Slack
Sat -- 08:28 PM PDT     Moonrise
Sat -- 08:29 PM PDT     Sunset
Sat -- 09:35 PM PDT     0.61 knots Max Flood
Sat -- 09:44 PM PDT     Full Moon
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.2-0.7-1-1.1-1-0.8-0.400.50.80.90.80.60.2-0.2-0.4-0.5-0.4-0.20.10.40.60.60.4

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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