Saturday, January18, 2020
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Marine Weather and Tides
Montezuma, KS

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 7:52AMSunset 5:48PM Friday January 17, 2020 11:51 PM CST (05:51 UTC) Moonrise 12:44AMMoonset 12:31PM Illumination 45% Phase: Third Quarter Moon; Moon at 23 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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PZZ530 San Pablo Bay, Suisun Bay, The West Delta And The San Francisco Bay North Of The Bay Bridge- 834 Pm Pst Fri Jan 17 2020
Tonight..NE winds up to 10 kt.
Sat..NE winds 5 to 10 kt.
Sat night..NE winds up to 10 kt.
Sun..NE winds 5 to 10 kt.
Sun night..NE winds up to 10 kt.
Martin luther king jr day..NE winds up to 10 kt. A chance of showers.
Mon night..S winds 5 to 10 kt. Showers likely.
Tue..SW winds up to 10 kt. Showers likely.
Wed..NW winds around 5 kt.
PZZ500 834 Pm Pst Fri Jan 17 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... High pressure is building rapidly over the great basin. This will bring offshore winds to the coastal waters and in the bays through Sunday. Winds will turn southerly and increase by Monday morning ahead of an approaching frontal system. A moderate northwest swell will arrive late Saturday and Sunday while a larger northwest swell arrives the middle of next week.


7 Day Forecast for Marine Location Near South San Francisco, CA
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location: 40.64, -100.36     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 180450 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 850 PM PST Fri Jan 17 2020

SYNOPSIS. High pressure building over the West Coast will result in dry and mild weather conditions through the weekend. Rain chances return late Monday into Tuesday. Mostly dry conditions are then expected for the remainder of next week.

DISCUSSION. As of 8:50 PM PST Friday . The primary forecast concern in the short term is fog. A weather spotter reported dense fog northeast of Concord earlier this evening, but latest observations across the region indicate only patchy light fog. Expect fog to become more widespread overnight, especially in the North and East Bay Valleys, although considerable high clouds may help limit fog formation to some extent. Patchy dense fog is certainly possible late tonight and through about mid morning on Saturday.

Besides fog, there are no other weather concerns through the weekend. An upper ridge over California will divert Pacific storm systems well to our north. Expect a warming trend through the weekend, with 60s becoming more common by Sunday, especially across southern portions of our area.

The upper ridge is forecast to shift to our east by Monday, allowing a system to spread precipitation across northern California from late Monday through Tuesday. This looks to be a system of moderate intensity that will be focused primarily across areas north of I-80, although there's a good chance of rain as far south as Monterey County by Tuesday afternoon. One thing to keep an eye on is a weak disturbance, located to the south of the primary system, that is expected to tap into subtropical moisture. The 00Z GFS shows this weak disturbance dissipating well offshore. The 12Z ECMWF, on the other hand, forecasts it to hold together long enough to produce some light precipitation across the southern third of our forecast area late on Monday, before the primary system to the north even arrives.

Upper level ridging is forecast to redevelop by the middle of next week, and generally dry conditions are expected for the remainder of the week. However, a weak system may brush the northern portion of our area around Thursday or Thursday night.

These weather systems over the next seven days will be approaching from the west and will therefore be relatively warm compared to recent systems. This will mean snow levels will remain mostly above 5000 feet during precipitation events.

AVIATION. as of 4:00 PM PST Friday . High pressure building over the district and low pressure off the Pacific Northwest will result in light winds during the daytime and light drainage offshore winds at night. A few afternoon cumulus clouds remain as there is still some residual low-level moisture. Increasing high clouds tonight but remaining VFR except for fog in the North Bay valleys.

Vicinity of KSFO . VFR with a few cumulus clouds until dark. Light offshore winds under 10 kt.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . VFR. Light onshore flow will switch to southeast tonight.

MARINE. As of 8:34 PM PST Friday . High pressure is building rapidly over the Great Basin. This will bring offshore winds to the coastal waters and in the bays through Sunday. Winds will turn southerly and increase by Monday morning ahead of an approaching frontal system. A moderate northwest swell will arrive late Saturday and Sunday while a larger northwest swell arrives the middle of next week.

MTR WATCHES/WARNINGS/ADVISORIES. Tngt. NONE.



PUBLIC FORECAST: Dykema AVIATION: W Pi MARINE: W Pi

Visit us at www.weather.gov/sanfrancisco

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RTYC1 - 9414523 - Redwood City, CA 1178 mi58 min 47°F 52°F1026.6 hPa
AAMC1 - 9414750 - Alameda, CA 1180 mi52 min 52°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 1181 mi82 min SSW 1.9 G 1.9

Wind History for Alameda, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Dodge City, Dodge City Regional Airport, KS23 mi60 minWNW 116.00 miFog/Mist37°F35°F93%1012.3 hPa

Link to 5 minute data for KSFO

Wind History from SFO (wind in knots)
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Last 24hrCalmCalm3SW3CalmS4S3CalmCalmCalmS3CalmE6E6NE4NE4N5NE6N4N3N3CalmE12NE10
1 day agoSE6SE11SE9E10E8E9SE14SE17SE13SE18S14
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NW4S11SE16SE16N9S9SW13W9W8S6SW64
2 days agoW6CalmSW3CalmSW3SW3CalmCalmCalmS3CalmCalmE3E6E5E5NE4E4W11SW8S8S12S6Calm

Tide / Current Tables for Point San Bruno, San Francisco Bay, California
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Point San Bruno
Click for Map
Sat -- 12:07 AM PST     1.59 feet Low Tide
Sat -- 01:24 AM PST     Moonrise
Sat -- 06:33 AM PST     7.29 feet High Tide
Sat -- 07:22 AM PST     Sunrise
Sat -- 12:34 PM PST     Moonset
Sat -- 01:46 PM PST     0.90 feet Low Tide
Sat -- 05:17 PM PST     Sunset
Sat -- 07:44 PM PST     5.16 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.61.82.73.95.26.47.27.26.75.64.22.81.71.10.91.42.23.34.355.14.84.13.2

Tide / Current Tables for Oyster Point 2.8 mi E, South San Francisco Bay, California Current
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Oyster Point 2.8 mi E
Click for Map
Sat -- 12:44 AM PST     0.00 knots Slack
Sat -- 01:23 AM PST     Moonrise
Sat -- 03:52 AM PST     0.90 knots Max Flood
Sat -- 07:00 AM PST     -0.00 knots Slack
Sat -- 07:22 AM PST     Sunrise
Sat -- 10:32 AM PST     -1.58 knots Max Ebb
Sat -- 12:34 PM PST     Moonset
Sat -- 01:59 PM PST     0.00 knots Slack
Sat -- 05:03 PM PST     0.86 knots Max Flood
Sat -- 05:17 PM PST     Sunset
Sat -- 08:07 PM PST     -0.01 knots Slack
Sat -- 10:57 PM PST     -0.90 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.40.10.50.80.90.80.50-0.7-1.2-1.5-1.5-1.3-0.700.50.80.90.80.50.1-0.5-0.8-0.9

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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for San Francisco/Monterey Bay Area, CA (0,6,7,8)
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Ground Weather Radar Station San Francisco Bay Area, CA
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weather_mapweather_map weather_map

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Disclaimer:
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.