Monday, July6, 2020
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Marine Weather and Tides
Seacliff, 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 5:53AMSunset 8:32PM Monday July 6, 2020 4:55 PM PDT (23:55 UTC) Moonrise 9:08PMMoonset 6:15AM Illumination 98% 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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PZZ535 Monterey Bay- 220 Pm Pdt Mon Jul 6 2020
.small craft advisory in effect until 9 pm pdt this evening...
.small craft advisory in effect from Tuesday morning through Tuesday evening...
Tonight..NW winds 20 to 30 kt with gusts up to 35 kt, diminishing to 10 to 20 kt with gusts up to 25 kt after midnight. Wind waves 6 to 7 ft, decreasing to 3 to 4 ft after midnight. NW swell 5 to 7 ft at 10 seconds, decreasing to 3 to 5 ft at 10 seconds after midnight. SWell S around 2 ft.
Tue..W winds 15 to 25 kt with gusts up to 30 kt. Wind waves 4 to 5 ft. NW swell 3 to 5 ft at 10 seconds and S around 2 ft at 14 seconds.
Tue night..NW winds 15 to 25 kt with gusts up to 30 kt. Wind waves 3 to 4 ft. NW swell 3 to 5 ft at 9 seconds and S around 2 ft at 14 seconds.
Wed..W winds 5 to 15 kt. Wind waves 2 to 3 ft. NW swell 3 to 5 ft at 9 seconds and S around 2 ft at 14 seconds.
Wed night..W winds up to 10 kt. Wind waves 1 to 2 ft. Mixed swell nw 2 to 4 ft at 8 seconds and S around 2 ft at 14 seconds.
Thu..W winds 5 to 15 kt. Wind waves 1 ft. NW swell 2 to 4 ft at 8 seconds.
Thu night..NW winds 5 to 10 kt. Wind waves 1 ft. NW swell 2 to 4 ft at 9 seconds.
Fri..NW winds 5 to 15 kt. Wind waves 1 to 2 ft. NW swell 2 to 4 ft.
Sat..NW winds 5 to 15 kt. Wind waves 1 to 2 ft. NW swell 2 to 3 ft. Locally lower winds and seas across sheltered portions of the bay.
PZZ500 220 Pm Pdt Mon Jul 6 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... An upper level trough approaching the pacific northwest and surface high pressure well offshore will produce strong and gusty northwest winds across the coastal waters through tonight. Gale force gusts are possible along the northern near shore waters and off of the big sur coast. These strong northwest winds will also generate steep fresh swell and hazardous seas conditions. Winds will diminish later in the week.


7 Day Forecast for Marine Location Near Seacliff, CA
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location: 36.97, -121.91     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 062031 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 131 PM PDT Mon Jul 6 2020

SYNOPSIS. Slightly cooler temperatures will continue into tomorrow as an upper trough moves through the region. This will likely result in the deepening 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 as high pressure builds over the region.

DISCUSSION. as of 01:31 PM PDT Monday . Mostly clear skies this afternoon across the Bay Area and Central Coast as the marine layer deepens ahead of an approaching upper trough. As a result, temperatures this afternoon are about 5 or so degrees cooler than yesterday with most locations along the coast in the 60s and 70s to mid 70s/80s across the interior. Expect a few degrees of additional warming this afternoon with highs along the coast in the 60s to low 70s to 70s/80s inland. Isolated interior locations will reach the low 90s. Breezy onshore winds continue this afternoon, particularly along the coast and in the hills where gusts of around 30-40 mph are still being observed. Gusty winds will persist the rest of the afternoon and this evening before easing overnight.

Cooler weather will continue for tomorrow as the upper trough moves through. Temperatures are forecast to be fairly similar to today with some breezy afternoon and evening winds returning, though not to the extent of today. The combination of the upper trough and northwest flow over the waters will likely result in the deepening of the marine layer along the coast and locally inland overnight. More widespread coastal stratus is expected tomorrow night and into Wednesday morning.

The upper trough will have moved off to the east by mid-week. The combination of building high pressure over the Desert Southwest and an approaching upper trough into British Columbia and the Pacific Northwest will result in more zonal flow across California. Later in the week, high pressure looks to build further over the Desert Southwest exerting more influence over the region. This will result in a more compressed marine layer and warming temperatures, particularly inland. Current forecast has not changed much from last night with a wide temperature spread across the area late this week and into the weekend. Coastal areas will likely remain in the upper 60s to mid 70s while the warmest spots across the interior rise into the mid 90s to about 100 degrees F.

AVIATION. as of 10:50 AM PDT Sunday . A dry air mass above the inversion layer has mixed into the lower levels allowing the stratus to dissipate across the region giving way to VFR conditions. Onshore winds will once again increase through the afternoon and remain gusty into the early evening before diminishing slightly overnight. The development of MVFR/IFR ceilings will impact the Monterey Bay terminals late this evening before spreading inland early Tuesday morning as the marine layer deepens, yet not all Bay Area terminals will be impacted.

Vicinity of KSFO . VFR. West winds will gradually increase through the afternoon with gusts in excess of 30 kt beyond 21Z. Winds diminish slightly late in the night with the potential for stratus development early Tuesday morning. However, confidence remains low with respect to the development of MVFR/IFR ceilings.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . VFR. Breezy onshore winds will persist through the afternoon before diminishing late this evening. MVFR/IFR ceilings likely to develop between 03-06Z Tuesday as the marine layer deepens and onshore flow persists.

MARINE. as of 08:50 AM PDT Monday . An upper level trough approaching the Pacific Northwest and surface high pressure well offshore will produce strong and gusty northwest winds across the coastal waters through tonight. Gale force gusts are possible along the northern near shore waters and off of the Big Sur coast. These strong northwest winds will also generate steep fresh swell and hazardous seas conditions. Winds will diminish later in the week.

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 Pigeon Pt 10-60 nm SCA . Pigeon Pt to Pt Piedras Blancas 10-60 nm GLW . Pt Pinos to Pt Piedras Blancas 0-10 nm until 3 AM GLW . Pt Arena to Pt Reyes 0-10 nm until 9 PM SCA . SF Bay until 9 PM SCA . Mry Bay until 9 PM



PUBLIC FORECAST: AS AVIATION: RGass MARINE: RGass

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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 13 mi140 min W 11 G 29 60°F 1015.8 hPa53°F
ELXC1 - Elkhorn Slough Reserve, CA 14 mi71 min SW 6 70°F 56°F
46092 - MBM1 16 mi87 min NW 21 57°F 56°F1015 hPa (-0.9)
46240 - Cabrillo Point, Monterey Bay, CA (158) 24 mi90 min 61°F5 ft
MEYC1 25 mi80 min W 7 G 15 60°F 63°F1017.1 hPa
46042 - MONTEREY - 27NM West of Monterey Bay, CA 29 mi36 min NW 18 G 21 56°F 55°F1016.8 hPa53°F
46114 - West Monterey Bay, CA 30 mi60 min 55°F8 ft
RTYC1 - 9414523 - Redwood City, CA 40 mi56 min W 15 G 20 67°F 75°F1015.7 hPa (+0.0)
46239 - Point Sur, CA (157) 44 mi60 min 54°F9 ft

Wind History for Monterey, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Watsonville, Watsonville Municipal Airport, CA7 mi63 minSSE 810.00 miFair76°F54°F47%1015.1 hPa

Link to 5 minute data for KWVI

Wind History from WVI (wind in knots)
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Last 24hrS8S9S6SE7SE6E4E4E4NE4CalmCalmCalmCalmCalmCalmNE4E4Calm4S7S6SE5SE7S8
1 day agoS7S6S6S6CalmCalmCalmCalmCalmCalmCalmCalmCalmNW4CalmCalmCalm4SW6SW5S7S8S7S10
2 days agoSW8SW7S8SW5S5SE5CalmCalmCalmCalmCalmN3CalmCalmCalmCalmCalm33S6SW7SW8S6S7

Tide / Current Tables for Santa Cruz, Monterey Bay, California
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Santa Cruz
Click for Map
Mon -- 05:55 AM PDT     Sunrise
Mon -- 06:10 AM PDT     -1.25 feet Low Tide
Mon -- 07:15 AM PDT     Moonset
Mon -- 01:17 PM PDT     4.36 feet High Tide
Mon -- 06:03 PM PDT     2.91 feet Low Tide
Mon -- 08:30 PM PDT     Sunset
Mon -- 10:08 PM PDT     Moonrise
Mon -- 11:43 PM PDT     5.65 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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5.64.73.31.70.2-0.8-1.2-1-0.30.71.833.94.34.33.93.53.12.93.13.64.355.5

Tide / Current Tables for Point Pinos, California Current
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Point Pinos
Click for Map
Mon -- 01:06 AM PDT     -0.00 knots Slack
Mon -- 04:28 AM PDT     -1.08 knots Max Ebb
Mon -- 05:55 AM PDT     Sunrise
Mon -- 07:16 AM PDT     Moonset
Mon -- 08:27 AM PDT     0.00 knots Slack
Mon -- 11:34 AM PDT     0.85 knots Max Flood
Mon -- 02:54 PM PDT     -0.00 knots Slack
Mon -- 05:08 PM PDT     -0.47 knots Max Ebb
Mon -- 08:18 PM PDT     0.00 knots Slack
Mon -- 08:29 PM PDT     Sunset
Mon -- 10:07 PM PDT     Moonrise
Mon -- 11:05 PM PDT     0.56 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.40-0.4-0.8-1.1-1.1-0.9-0.6-0.20.20.60.80.80.70.4-0-0.4-0.5-0.4-0.3-0.10.20.50.6

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 (19,4,5,8)
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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.