Sunday, July12, 2020
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Marine Weather and Tides
Rio del Mar, 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 5:57AMSunset 8:30PM Sunday July 12, 2020 4:19 PM PDT (23:19 UTC) Moonrise 12:00AMMoonset 12:10PM Illumination 50% Phase: Third Quarter Moon; Moon at 22 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- 241 Pm Pdt Sun Jul 12 2020
Rest of today..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 9 seconds.
Tonight..W winds 5 to 15 kt. Wind waves 1 to 2 ft. W swell 3 to 5 ft at 9 seconds.
Mon..W winds 5 to 15 kt. Wind waves 1 to 2 ft. W swell 3 to 5 ft at 9 seconds.
Mon night..SW winds up to 10 kt. Wind waves 1 ft. W swell 3 to 5 ft at 9 seconds.
Tue..SW winds up to 10 kt. Wind waves 1 to 2 ft. W swell 2 to 4 ft at 9 seconds.
Tue night..SW winds around 5 kt. Wind waves 1 ft. W swell 2 to 4 ft at 9 seconds.
Wed..SW winds 5 to 15 kt. Wind waves 1 ft. W swell 2 to 4 ft.
Thu..SW winds up to 10 kt. Wind waves 1 ft. W swell 2 to 4 ft. Locally lower winds and seas across sheltered portions of the bay.
PZZ500 241 Pm Pdt Sun Jul 12 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... A strong notherly gradient will result in moderate to locally gusty north to northwest winds across the coastal waters today and tomorrow. These winds will generate steep fresh swell resulting in hazardous conditions for small craft vessels. Winds weaken significantly and shift southward along the coast through midweek. A longer period south swell will mix with the steep fresh northwest swell.


7 Day Forecast for Marine Location Near Rio del Mar, CA
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location: 36.96, -121.9     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 122102 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 202 PM PDT Sun Jul 12 2020

SYNOPSIS. Hot and dry conditions will persist across the interior today while cooler temperatures are expected near the coast. Interior cooling is then likely early in the week as onshore flow increases and high pressure weakens.

DISCUSSION . as of 02:02 PM PDT Sunday . Fog/low-cloud deck along the coast has all but dissipated this afternoon, with the nearest cloud deck well over 100 nautical miles off the San Francisco Peninsula. Onshore winds also remain weak across the entire CWA, but are expected to pick up somewhat over the San Francisco Penninsula and high-terrain locations in the East and South Bay later this afternoon.

Several interior locations are reporting mid-90s and low 100s; mid-to-upper 90s have been reported around Lake Berryessa while Livermore AP is currently 2 degrees short of the 100 F mark. The stations with the highest observed temperatures in our CWA at this time are down in southern Monterey County, with 101 being reported in Pinnacles National Park and 102 at Ft. Hunter Liggett. Mild temps along the coast will persist throguhout the day.

One of this afternoon's primary concerns will be the heat over the interior. The 596dm 500mb upper-level ridge that has been sitting over the southwest, where places like Phoenix and Palm Springs are well over the 110-degree F mark. The good news is we will not be reaching those excessive heat conditions over in our CWA. Nevertheless, max temps across interior Santa Clara, Napa, Sonoma, and San Benito counties are set to easily reach max temps in the mid-to-upper 90s today, while our hottest conditions today will be found in northern Napa and southern Monterey counties. Those who plan to take part in recreational activities in places like Bothe-Napa Valley State Park to our north and Pinnacles National Park to our south this afternoon should be mindful of these conditions.

In terms of fire weather, we have not observed any fires in our CWA like what was observed yesterday east of San Jose but hot temps and single- digit/low-teen RH values are something to be mindful of for the rest of the day. Thankfully, weak onshore flow has been observed throughout this entire upper-level ridge setup, which has helped to mitigate those concerns.

The axis of the 558dm 500mb upper-level trough centered over central British Columbia will gradually make its way into our CWA overnight and into Monday morning as the ridge weakens and loses its influence over the region. The marine layer also looks poised to make a comeback, with model guidance also suggesting some surface /near-surface cyclonic flow to gradually develop as a result. The big take-away is that next week's setup will lead to cooling all along the coast and especially in the interior.

AVIATION. as of 10:40 AM PDT Sunday . for 18z TAFs. Widespread VFR through the daylight hours today with a robust northerly gradient offshore and high pressure overhead suppressing the marine layer. Onshore gradient strengthens into the afternoon with warming inland allowing for breezy to locally gusty (strongest through coastal gaps) onshore winds to prevail this afternoon and evening. Marine layer anticipated to redevelop into the evening offshore before attempting to intrude inland overnight. Intrusion will not be deep but will bring borderline MVFR/IFR cigs to the coastally influenced TAF sites through the predawn to early morning hours. Breezy onshore winds redevelop tomorrow afternoon.

Vicinity of KSFO . VFR, west to northwest wind near 10 knots then increasing to 20 to near 30 knots in the afternoon to mid evening. A stratus intrusion is probable tonight and Monday morning then low to moderate forecast confidence OVC IFR ceiling until 17z-18z.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . VFR today. West winds increasing to 10 to 15 knots in the afternoon and early evening. West to northwest winds in the evening resulting in IFR ceilings developing late to overnight.

MARINE. as of 10:32 AM PDT Sunday . Robust northerly gradient will bring moderate to locally gusty northwest winds across the coastal waters today and tomorrow. Northwest winds will generate steep fresh swell resulting in hazardous conditions for small craft vessels. A longer period south swell will mix with the steep fresh northwest swell. A nearly stationary and mainly dry low pressure trough will develop over the coastal waters Tuesday through Thursday resulting in southerly winds mainly over the inner and southern coastal waters.

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



PUBLIC FORECAST: Diaz/MM AVIATION: DRP MARINE: DRP

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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 12 mi102 min W 7 G 18 61°F 1013.2 hPa55°F
ELXC1 - Elkhorn Slough Reserve, CA 13 mi94 min W 7 65°F 57°F
46092 - MBM1 16 mi60 min WNW 14 56°F 55°F1012.6 hPa (-1.4)
46240 - Cabrillo Point, Monterey Bay, CA (158) 23 mi23 min 60°F2 ft
MEYC1 25 mi43 min WNW 12 G 16 60°F 63°F1013.1 hPa
46042 - MONTEREY - 27NM West of Monterey Bay, CA 29 mi29 min NW 19 G 25 57°F 56°F7 ft1012.9 hPa54°F
46114 - West Monterey Bay, CA 30 mi23 min 55°F7 ft
RTYC1 - 9414523 - Redwood City, CA 41 mi49 min N 8.9 G 13 80°F 76°F1011.4 hPa
46239 - Point Sur, CA (157) 44 mi23 min 53°F6 ft

Wind History for Monterey, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Watsonville, Watsonville Municipal Airport, CA6 mi26 minSSW 710.00 miFair73°F55°F53%1012.3 hPa

Link to 5 minute data for KWVI

Wind History from WVI (wind in knots)
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Last 24hrS7S7S7SE6S5S3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm4S7S76SW7S9S7
1 day agoS9S8S8S5CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmS3SE33S5S8S8S9S7S9
2 days agoS8S7S7S7SE3SE3S3CalmCalmN3CalmCalmCalmCalmCalmSW3SE33S7S6S7SW8S8S8

Tide / Current Tables for Santa Cruz, Monterey Bay, California
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Santa Cruz
Click for Map
Sun -- 12:40 AM PDT     Moonrise
Sun -- 04:00 AM PDT     3.37 feet High Tide
Sun -- 05:58 AM PDT     Sunrise
Sun -- 10:24 AM PDT     1.28 feet Low Tide
Sun -- 01:11 PM PDT     Moonset
Sun -- 04:31 PM PDT     Last Quarter
Sun -- 05:10 PM PDT     4.64 feet High Tide
Sun -- 08:28 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.42.733.33.43.32.92.521.51.31.31.72.43.13.84.44.64.54.23.632.42.1

Tide / Current Tables for Point Pinos, California Current
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Point Pinos
Click for Map
Sun -- 12:40 AM PDT     Moonrise
Sun -- 12:57 AM PDT     0.00 knots Slack
Sun -- 03:25 AM PDT     0.31 knots Max Flood
Sun -- 05:59 AM PDT     Sunrise
Sun -- 06:16 AM PDT     -0.00 knots Slack
Sun -- 09:01 AM PDT     -0.49 knots Max Ebb
Sun -- 12:48 PM PDT     0.00 knots Slack
Sun -- 01:11 PM PDT     Moonset
Sun -- 03:50 PM PDT     0.46 knots Max Flood
Sun -- 04:31 PM PDT     Last Quarter
Sun -- 07:05 PM PDT     -0.00 knots Slack
Sun -- 08:27 PM PDT     Sunset
Sun -- 09:47 PM PDT     -0.51 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.200.20.30.30.20.1-0.2-0.4-0.5-0.4-0.3-0.100.30.40.50.40.30-0.3-0.5-0.5-0.4

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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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for San Francisco/Monterey Bay Area, CA (19,4,5,8)
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Ground Weather Radar Station San Francisco Bay Area, CA
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