Monday, July6, 2020
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Marine Weather and Tides
Pescadero, 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 5:52AMSunset 8:33PM Monday July 6, 2020 2:18 AM PDT (09:18 UTC) Moonrise 9:11PMMoonset 6:16AM 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- 854 Pm Pdt Sun Jul 5 2020
.small craft advisory in effect through Tuesday afternoon...
Tonight..NW winds 15 to 30 kt with gusts up to 35 kt. Wind waves 5 to 6 ft, decreasing to 3 to 4 ft after midnight. NW swell 5 to 7 ft at 8 seconds and S 2 to 3 ft at 16 seconds.
Mon..NW winds 20 to 30 kt with gusts up to 35 kt. Wind waves 4 to 5 ft. NW swell 6 to 7 ft at 9 seconds and S 2 to 3 ft at 15 seconds.
Mon night..NW winds 15 to 25 kt with gusts up to 35 kt. Wind waves 4 to 5 ft. NW swell 6 to 7 ft at 8 seconds and S 2 to 3 ft at 15 seconds.
Tue..NW winds 15 to 25 kt with gusts up to 30 kt. Wind waves 5 to 6 ft. NW swell 5 to 7 ft at 9 seconds and S around 2 ft at 14 seconds.
Tue night..NW winds 10 to 20 kt with gusts up to 25 kt. Wind waves 3 to 4 ft. NW swell 5 to 7 ft at 10 seconds and S around 2 ft at 14 seconds.
Wed..NW winds 10 to 15 kt. Wind waves 1 to 2 ft. NW swell 4 to 5 ft at 9 seconds and S around 2 ft at 15 seconds.
Wed night..NW winds 5 to 15 kt. Wind waves 1 to 2 ft. NW swell 4 to 5 ft at 8 seconds and S around 2 ft at 14 seconds.
Thu..NW winds 5 to 15 kt with gusts up to 25 kt. Wind waves 1 to 2 ft. NW swell 3 to 5 ft and S around 2 ft.
Fri..NW winds 10 to 20 kt with gusts up to 25 kt. Wind waves 1 to 2 ft. Mixed swell nw 3 to 4 ft and S around 2 ft.
PZZ500 854 Pm Pdt Sun Jul 5 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Strong and gusty northwest winds will continue over the coastal waters tonight into midweek. Gusty west to northwest winds will also develop over the bays each afternoon and evening. Expect gale force gusts over the northern waters tonight and along the big sur coast Monday afternoon and evening into Tuesday. These strong northwest winds will generate steep fresh swell and hazardous seas conditions. A long-period southerly swell will continue through Monday before swell periods begin to subside.


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 060457 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 957 PM PDT Sun Jul 5 2020

SYNOPSIS. Breezy onshore winds will gradually subside overnight. Monday afternoon high temperatures will be slightly cooler as onshore flow increases with a likely return of the marine layer for the immediate coastline. Temperatures are expected to be similar through midweek before warming late in the week and into next weekend.

DISCUSSION. as of 9:27 PM PDT Sunday . Clear skies were observed all across the CWA today, with the greatest extent of cloud cover still well off the California coast. Warm conditions dominated the interior with high 80s and low-to- mid 90s observed in concert with low RH values ranging 15-20% in places like Gilroy and Livermore. Onshore flow has also persisted along the coast and most of the interior, although these onshore winds are still quite dry. Moreover, wildfires have broken out this afternoon across the East and South Bay, with the Crews Fire due east of Gilroy still ongoing at the time of this discussion and being fanned by gusty, northwest winds, but these winds are expected to subside overnight.

Temperatures will be cooler across the entire CWA tomorrow as the upper-level 564dm 500mb trough off the coast of British Columbia travels down the coast and its axis centers itself due west of the Bay Area. This shift in the pattern will allow for the marine layer to build itself back up and for low clouds to return to the coast and locally inland by tomorrow morning. The northwesterly winds that will be associated with this upper-level trough will also drive a more noticeable cool down over the interior, with locations like Livermore expected to be about 10 degrees cooler than today. The biggest concern for tomorrow will be the gusty winds, which models are suggesting will be stronger than today's. As such, fire concerns will persist through tomorrow although we are expecting RH to trend higher which could help decrease potentially hazardous conditions.

Looking ahead into the middle of the week, both the ECMWF and GFS runs for today are suggesting a gradual buildup of a 598dm 500mb upper-level ridge over the 4-corners. Should it play out this way, we can expect temperatures to gradually increase and dry conditions to continue through the middle and end of the week. At this time, the ridge does not appear to pose any threat for excessive heat in our CWA but we can expect temperatures to return to what we observed this 4th of July weekend by Friday and Saturday of next week.

AVIATION. as of 9:57 PM PDT Sunday . for 06Z TAFS. VFR. A dry mid-latitude northwest wind flow is thus far preventing fog and stratus development. Strong northerly pressure gradients and winds and a dry air intrusion from the north will limit stratus and fog to patchy coverage on the immediate coastline late tonight and Monday morning. Lower level cooling and weakening of the flat 500 mb height ridge is forecast tonight, Monday and Monday night which will likely weaken the marine layer temperature inversion at least a little bit and increase the marine layer depth. The marine layer depth had earlier varied from 1,200 to 1,600 feet.

Vicinity of KSFO . VFR. A peak west wind gust to 36 knots or 41 mph at 7:04 pm this evening has since decreased with gusts now near 25 knots per 5 minute observations. Looks good for VFR through the taf period given overall conditions mainly due to a strong northerly ACV-SFO pressure gradient, currently 7.7 mb. Gusty west wind returning Monday and Tuesday afternoons and evenings per statistical guidance.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . VFR due to dry west to northwest winds this evening. A patch of fog and/or stratus is possible early Monday morning along the Monterey Bay otherwise VFR is forecast Monday.

MARINE. as of 9:32 PM PDT Sunday . Strong and gusty northwest winds will continue over the coastal waters tonight into midweek. Gusty west to northwest winds will also develop over the bays each afternoon and evening. Expect gale force gusts over the northern waters tonight and along the Big Sur coast Monday afternoon and evening into Tuesday. These strong northwest winds will generate steep fresh swell and hazardous seas conditions. A long-period southerly swell will continue through Monday before swell periods begin to subside.

MTR WATCHES/WARNINGS/ADVISORIES. Tngt. 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 Arena to Pigeon Pt 10-60 nm SCA . Pigeon Pt to Pt Piedras Blancas 10-60 nm SCA . Pt Pinos to Pt Piedras Blancas 0-10 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
RTYC1 - 9414523 - Redwood City, CA 24 mi48 min SW 2.9 G 5.1 62°F 1014.8 hPa
46042 - MONTEREY - 27NM West of Monterey Bay, CA 27 mi28 min NW 21 G 25 55°F 55°F10 ft1014.9 hPa53°F
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 29 mi28 min NW 21 G 29 55°F 11 ft1015.2 hPa52°F
46114 - West Monterey Bay, CA 33 mi52 min 55°F10 ft
46092 - MBM1 35 mi99 min NW 16 56°F 56°F1014.2 hPa (+0.0)
MLSC1 - Moss Landing, South Harbor, CA 41 mi66 min ESE 5.1 G 13 53°F 1014.8 hPa51°F
AAMC1 - 9414750 - Alameda, CA 41 mi48 min WSW 5.1 G 6 58°F 1014.1 hPa
PXSC1 43 mi48 min 58°F 53°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 43 mi48 min Calm G 4.1 56°F 1012.9 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 43 mi48 min WSW 7 G 8
OBXC1 43 mi48 min 59°F 54°F
LNDC1 43 mi48 min S 4.1 G 5.1 59°F 1013.9 hPa
FTPC1 - 9414290 - San Francisco, CA 43 mi48 min S 1 G 6 56°F 1013.8 hPa
ELXC1 - Elkhorn Slough Reserve, CA 43 mi93 min SE 6 54°F 53°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 44 mi48 min SW 5.1 G 6 59°F 1014 hPa
46237 - San Francisco Bar, CA (142) 44 mi48 min 56°F6 ft
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 46 mi28 min NW 23 G 29 55°F 9 ft1014.5 hPa53°F
46240 - Cabrillo Point, Monterey Bay, CA (158) 46 mi52 min 60°F3 ft
MEYC1 48 mi42 min WSW 2.9 G 7 62°F1015.3 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 49 mi32 min S 4.1 58°F 1013 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 mi78 minNNW 85.00 miFog/Mist55°F51°F88%1015.6 hPa

Link to 5 minute data for KPAO

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Last 24hrN12----------------------------N4--N3N7N8N10N14N14NW12
1 day agoNW15----------------------------CalmN4NW4--N7N9N10----
2 days ago------------------------------55--N5N6NW11NW12N12--

Tide / Current Tables for Ano Nuevo Island, California
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Ano Nuevo Island
Click for Map
Mon -- 05:55 AM PDT     Sunrise
Mon -- 06:04 AM PDT     -1.35 feet Low Tide
Mon -- 07:16 AM PDT     Moonset
Mon -- 01:08 PM PDT     4.26 feet High Tide
Mon -- 05:57 PM PDT     2.81 feet Low Tide
Mon -- 08:32 PM PDT     Sunset
Mon -- 10:10 PM PDT     Moonrise
Mon -- 11:34 PM PDT     5.55 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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5.44.531.4-0.1-1-1.4-1.1-0.30.71.933.94.34.13.83.32.92.833.64.355.5

Tide / Current Tables for Half Moon Bay, California
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Half Moon Bay
Click for Map
Mon -- 05:55 AM PDT     Sunrise
Mon -- 06:18 AM PDT     -1.25 feet Low Tide
Mon -- 07:16 AM PDT     Moonset
Mon -- 01:26 PM PDT     4.66 feet High Tide
Mon -- 06:11 PM PDT     2.91 feet Low Tide
Mon -- 08:34 PM PDT     Sunset
Mon -- 10:11 PM PDT     Moonrise
Mon -- 11:52 PM PDT     5.95 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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65.23.720.4-0.7-1.2-1.1-0.40.61.834.14.64.64.23.63.12.93.13.64.35.15.7

Weather Map
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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 (5,6,7,8)
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Ground Weather Radar Station San Francisco Bay Area, CA
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The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerous of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.