Thursday, December12, 2019
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Marine Weather and Tides
Pescadero, CA

Version 3.4
NOTICE
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.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 7:11AMSunset 4:52PM Thursday December 12, 2019 2:17 PM PST (22:17 UTC) Moonrise 5:36PMMoonset 7:38AM Illumination 99% Phase: Waning Gibbous; Moon at 16 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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PZZ560 Coastal Waters From Pigeon Point To Point Pinos California Out To 10 Nm- 847 Am Pst Thu Dec 12 2019
.small craft advisory in effect through late Friday night...
Today..W winds around 5 kt. Wind waves 1 ft. W swell 6 to 8 ft at 19 seconds, increasing to 9 to 11 ft at 19 seconds this afternoon. A slight chance of rain. Patchy fog this afternoon.
Tonight..NW winds around 5 kt. Wind waves 1 ft. W swell 11 to 13 ft at 19 seconds.
Fri..W winds up to 10 kt. Wind waves 1 ft. W swell 11 to 13 ft at 18 seconds. A chance of rain.
Fri night..NW winds 5 to 15 kt. Wind waves 1 to 2 ft. W swell 11 to 13 ft at 17 seconds. A chance of rain.
Sat..NW winds 10 to 15 kt. Wind waves 1 to 2 ft. W swell 9 to 11 ft at 16 seconds. A slight chance of rain.
Sat night..NW winds 15 to 20 kt with gusts up to 25 kt. Wind waves around 2 ft. W swell 8 to 10 ft at 15 seconds.
Sun..N winds 10 to 20 kt. Wind waves 1 to 2 ft. NW swell 7 to 9 ft.
Mon..E winds 5 to 15 kt. Wind waves 1 to 2 ft. NW swell 6 to 8 ft. A chance of rain.
PZZ500 847 Am Pst Thu Dec 12 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Southerly winds remain light and will prevail through Thursday before switching to west to northwest. By Friday night, northwest winds will increase as the next storm system moves in. A large long-period northwest swell will impact the waters through Saturday. Hazardous conditions for small craft vessels will exist with this arriving northwest swell due to steep large seas.


7 Day Forecast for Marine Location Near Pescadero, CA
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location: 37.18, -122.39     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 122150 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 150 PM PST Thu Dec 12 2019

SYNOPSIS. Rain chances increase again Friday into Saturday with temperatures turning colder Sunday into Monday. An unsettled and wet pattern will likely return by middle of next week.

DISCUSSION. as of 1:50 PM PST Thursday . Very mild conditions across the district with afternoon readings ranging from the upper 50s to mid 60s, warmer than yesterday at this time by as many as 10 degrees. Radar continues to show a few light showers passing across the Bay Area, with Concord, Hayward and Navato reporting drizzle or light showers in the latest surface observations. This shower activity is expected to decrease overnight.

By late Friday night, an increase in moisture will spread across northern California for renewed chances of light rain or drizzle. The North Bay is expected to see the highest chances, then light rain chances spread into the southern portion of the district by Saturday morning. A few light showers are also possible on Sunday as a second weak impulse moves through.

Conditions will dry out and temperatures will turn cooler Sunday into early next week as a colder air mass moves over the area from the north. Looking for more widespread 30s and 40s for overnight lows from Saturday night into Monday night. Will need to watch for the potential for areas of frost or even freezing temperatures in the region's coldest interior valleys early next week.

While the longer range ensembles still indicate a return to unsettled and wet conditions with the potential for more widespread rainfall across the region during the extended forecast period.

AVIATION. as of 9:50 AM PST Thursday . for 18z TAFs. Low to mid-level stratus clouds surround the Bay Area and the Central Coast. Mostly widespread MVFR conditions but occasional IFR, even isolated terminals at LIFR, is possible as moisture from the ocean continues to move over the area. Less than 10 kts winds will prevail across all terminals. Isolated, very light on and off rain showers persist, but will be too weak to for extended showers that could wet runways. After sunset, forecast is for cigs to lower once again as MVFR continues trending toward IFR, locally LIFR-VLIFR overnight.

Vicinity of KSFO . Light winds prevail. MVFR conditions with cigs around 1500 feet as stratus clouds sit over the region. A passing shower is possible through the TAF period, but nothing for long durations. Lowering cigs is forecast tonight trending to IFR conditions.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . Winds are light with cigs around 1500 feet providing mostly MVFR conditions. Cigs should improve somewhat this afternoon but persist with MVFR. Light, passing showers are possible through the TAF period, but nothing long enough to wet runways. Tonight sees cigs lower once again to borderline LIFR/IFR overnight.

MARINE. as of 09:41 AM PST Thursday . Southerly winds remain light and will prevail through Thursday before switching to west to northwest. By Friday night, northwest winds will increase as the next storm system moves in. A large long-period northwest swell will impact the waters through Saturday. Hazardous conditions for small craft vessels will exist with this arriving northwest swell due to steep large seas.

MTR WATCHES/WARNINGS/ADVISORIES. Tngt. High Surf Advisory . CAZ006-505-509-529-530 SCA . Pt Arena to Pt Reyes 0-10 nm SCA . Pt Reyes to Pigeon Pt 0-10 nm SCA . Pigeon Pt to Pt Pinos 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: Sims AVIATION: DK MARINE: DK

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RTYC1 - 9414523 - Redwood City, CA 24 mi47 min N 5.1 G 7 62°F 57°F1025.6 hPa
46042 - MONTEREY - 27NM West of Monterey Bay, CA 27 mi27 min SW 1.9 G 3.9 58°F 57°F9 ft1026 hPa58°F
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 29 mi17 min SW 5.8 G 7.8 58°F 1025.8 hPa57°F
46114 - West Monterey Bay, CA 32 mi17 min 58°F8 ft
46092 - MBM1 35 mi70 min NE 1.9 57°F 57°F1026.8 hPa (-0.4)
MLSC1 - Moss Landing, South Harbor, CA 41 mi23 min W 2.9 G 7 60°F 1025.8 hPa (-1.4)58°F
AAMC1 - 9414750 - Alameda, CA 41 mi47 min NNW 1 G 2.9 60°F 55°F1025.6 hPa
PXSC1 43 mi47 min 61°F 61°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 43 mi47 min WSW 2.9 G 6 60°F 1024.6 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 43 mi47 min W 1.9 G 2.9
OBXC1 43 mi47 min 59°F 59°F
LNDC1 43 mi47 min NNW 2.9 G 5.1 60°F 1025.5 hPa
FTPC1 - 9414290 - San Francisco, CA 43 mi47 min WNW 4.1 G 5.1 58°F 55°F1025.8 hPa
ELXC1 - Elkhorn Slough Reserve, CA 43 mi92 min NNE 1 65°F 1027 hPa60°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 44 mi47 min W 1 G 1.9 58°F 1025.6 hPa
46237 - San Francisco Bar, CA (142) 44 mi77 min 55°F8 ft
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 46 mi27 min NE 3.9 G 7.8 57°F 56°F8 ft1026 hPa
46240 - Cabrillo Point, Monterey Bay, CA (158) 46 mi17 min 58°F3 ft
MEYC1 48 mi41 min 58°F1025.9 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 49 mi42 min SW 2.9 59°F 1026 hPa

Wind History for Redwood City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Half Moon Bay Airport, CA24 mi97 minSE 40.50 miFog57°F57°F100%1026.4 hPa

Link to 5 minute data for KHAF

Wind History from HAF (wind in knots)
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Last 24hrSE7SE5S9S9SE10S10S10SE9SE7SE6SE5S9S13
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1 day agoSE6S6SW4S7S4W7CalmSE5SE9SE4SE3E5CalmSE7S6S6SE3SE4S5SE5S4SE7SE6S7
2 days agoNW7NW9NW10N7N6N6N6N3NE5NE4CalmCalmN3N3CalmE5CalmN5CalmCalmCalmCalmW6Calm

Tide / Current Tables for Ano Nuevo Island, California
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Ano Nuevo Island
Click for Map
Thu -- 03:34 AM PST     2.71 feet Low Tide
Thu -- 07:13 AM PST     Sunrise
Thu -- 07:37 AM PST     Moonset
Thu -- 09:22 AM PST     5.70 feet High Tide
Thu -- 04:33 PM PST     -1.06 feet Low Tide
Thu -- 04:52 PM PST     Sunset
Thu -- 05:35 PM PST     Moonrise
Thu -- 11:36 PM PST     4.05 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.83.432.82.73.13.84.65.35.75.653.82.30.8-0.3-1-1-0.50.41.52.53.44

Tide / Current Tables for Half Moon Bay, California
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Half Moon Bay
Click for Map
Thu -- 03:48 AM PST     2.81 feet Low Tide
Thu -- 07:15 AM PST     Sunrise
Thu -- 07:39 AM PST     Moonset
Thu -- 09:40 AM PST     6.10 feet High Tide
Thu -- 04:47 PM PST     -0.96 feet Low Tide
Thu -- 04:52 PM PST     Sunset
Thu -- 05:35 PM PST     Moonrise
Thu -- 11:54 PM PST     4.45 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.23.83.32.92.83.13.84.65.466.15.64.531.40-0.8-0.9-0.50.31.42.53.54.2

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 (17,4,5,8)
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Ground Weather Radar Station San Francisco Bay Area, CA
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