Monday, August26, 2019 L-36.com


Marine Weather and Tides
Tamalpais-Homestead Valley, CA

Version 3.4
NOTICE
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 6:33AMSunset 7:50PM Monday August 26, 2019 1:10 AM PDT (08:10 UTC) Moonrise 1:09AMMoonset 4:13PM Illumination 18% Phase: Waning Crescent; Moon at 25 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- 953 Pm Pdt Sun Aug 25 2019
Tonight..SW winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Patchy fog after midnight.
Mon..SW winds 10 to 15 kt.
Mon night..SW winds 10 to 15 kt.
Tue..SW winds 10 to 15 kt.
Tue night..SW winds 10 to 15 kt.
Wed..SW winds 15 to 20 kt with gusts up to 25 kt.
Wed night..SW winds 10 to 15 kt.
Thu..SW winds 10 to 15 kt.
Fri..W winds 10 to 15 kt.
PZZ500 953 Pm Pdt Sun Aug 25 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Weakening high pressure over the eastern pacific will keep light winds over the coastal waters through about the middle of the week. SEa breezes will develop in the afternoons and evenings over the san francisco bay to the delta.


7 Day Forecast for Marine Location Near Tamalpais-Homestead Valley, CA
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location: 37.89, -122.57     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 260548
afdmtr
area forecast discussion
national weather service san francisco bay area
1048 pm pdt Sun aug 25 2019

Synopsis High pressure will continue to produce very warm
conditions inland through Tuesday. A shallow marine layer will
persist along the coast, along with light onshore flow, resulting
in relatively mild temperatures near the ocean and bays. Moisture
from tropical storm ivo will likely pass across our area from
Tuesday through early Wednesday, bringing increasing clouds and
higher humidity. Cooler temperatures are forecast for the second
half of the week.

Discussion As of 9:00 pm pdt Sunday... As expected, a
compressed marine layer and strong high pressure aloft allowed
inland temperatures to warm today. Afternoon highs away from the
ocean were about 5 degrees warmer than on Saturday. Light onshore
flow and the shallow marine layer kept coastal areas relatively
cool, and some locations, such as san francisco and monterey, were
slightly cooler than yesterday.

The 00z oakland sounding and latest profiler data indicate the
marine layer remains shallow with a depth of about 1000 feet.

Little change is forecast through Monday as a relatively strong
upper ridge remains in place over california. Model guidance
indicate that inland temperatures could be a few degrees warmer
tomorrow, otherwise little change is expected.

Evening IR satellite imagery shows high clouds beginning to spread
into far southern california. These clouds are associated with
remnant moisture from former tropical storm ivo. Ivo's moisture is
forecast to continue to drift to the north and arrive over central
california by late Monday night and northern california by Tuesday
evening. Models continue to forecast the most concentrated
moisture and best mid level instability will remain offshore.

However, the 00z NAM indicates increasing instability in the mid
levels across the northern portion of our forecast area by
Tuesday evening, and especially across the north bay Tuesday
night. Even so, available moisture and instability in the mid
levels looks marginal for high-based shower thunderstorm
development. Plus, the NAM often over-forecasts mid level
instability in situations such as this. In any case, will need to
monitor the incoming moisture plume closely. If convection
develops to our south late tomorrow and tomorrow night, then
thunderstorms may need to be added to our forecast for Tuesday and
Tuesday night. The tropical moisture is expected to exit our area
to the north by midday Wednesday.

Models maintain very warm conditions inland into Tuesday,
although if mid and high clouds are present we may see modest
cooling. However, if any of the tropical moisture filters into the
lower levels, the higher humidity may make Tuesday feel even
warmer. Heat risks over the next few days are still projected to
remain mostly in the moderate category.

An inland cooling trend is forecast for Wednesday and Thursday as
the upper ridge weakens over california. Inland high temperatures
are expected to cool by 5 to 10 degrees by Thursday.

Aviation As of 10:48 pm pdt Sunday... It'sVFR except vlifr-ifr
due to fog and very low stratus ceilings along the coastline from
sonoma county to monterey county. Vlifr-ifr slowly spreads into
the nearby valleys as well as through the golden gate this evening
and overnight. Fog may be dense in spots at times tonight and
Monday morning.VFR returning back to the coastline late Monday
morning and afternoon.

Vicinity of ksfo...VFR likely due to a compressed marine layer.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... Vlifr-ifr along the monterey bay and
into the salinas valley tonight and Monday morning. Conditions
lifting toVFR by late Monday morning and afternoon. Ifr likely
returning early Monday evening and night.

Marine As of 10:38 pm pdt Sunday... Weakening high pressure over
the eastern pacific will keep light winds over the coastal waters
through about the middle of the week. Sea breezes will develop in
the afternoons and evenings over the san francisco bay to the
delta.

Mtr watches warnings advisories
Tngt None.

Public forecast: dykema
aviation marine: canepa
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
TIBC1 - Tiburon Pier, San Francisco Bay, CA 7 mi41 min Calm 60°F 1014 hPa
46237 - San Francisco Bar, CA (142) 8 mi40 min 61°F3 ft
FTPC1 - 9414290 - San Francisco, CA 8 mi58 min SSW 6 G 11 56°F 62°F1014.6 hPa
RCMC1 - 9414863 - Richmond, CA 9 mi52 min 68°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 11 mi52 min WNW 1 G 1.9 57°F 1013.2 hPa
PXSC1 11 mi52 min 58°F 58°F
PPXC1 - 9414847 - Richmond (Point Potrero), CA 11 mi52 min S 14 G 16 59°F 1014.3 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 14 mi52 min WSW 7 G 9.9
OBXC1 14 mi52 min 59°F 59°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 14 mi52 min WNW 1.9 G 2.9 59°F 1014.3 hPa
AAMC1 - 9414750 - Alameda, CA 16 mi58 min W 5.1 G 6 60°F 71°F1014.8 hPa
LNDC1 17 mi52 min W 4.1 G 5.1 61°F 1014.3 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 17 mi40 min SW 3.9 G 3.9 54°F 61°F1015.3 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 20 mi52 min W 6 G 8.9 64°F 1013.1 hPa
PRYC1 - 9415020 - Point Reyes, CA 23 mi52 min 62°F1014.5 hPa
UPBC1 26 mi52 min NW 8 G 12
MZXC1 - 9415102 - Martinez-Amorco CA 26 mi52 min NW 8 G 9.9 71°F1013.2 hPa
PCOC1 - 9415144 - Port Chicago, CA 30 mi52 min W 12 G 14 73°F1013 hPa
RTYC1 - 9414523 - Redwood City, CA 33 mi52 min NW 4.1 G 5.1 63°F 76°F1014.8 hPa
SFXC1 - San Francisco Bay Reserve, CA 36 mi85 min W 11 68°F 1012 hPa53°F
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 38 mi52 min WNW 8.9 G 12 1011.9 hPa
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 46 mi40 min SSW 1.9 G 3.9 55°F1014.6 hPa
46214 - Point Reyes, CA (029) 48 mi40 min 58°F5 ft

Wind History for San Francisco, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Novato / Gnoss Field, CA18 mi1.9 hrsno data10.00 miFair57°F55°F94%1013.9 hPa
Oakland, Metro Oakland International Airport, CA23 mi77 minNW 510.00 miA Few Clouds61°F55°F84%1014.3 hPa

Link to 5 minute data for KDVO

Wind History from DVO (wind in knots)
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Last 24hr------N8N7CalmN5N4CalmCalmCalmSE4E5W7
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N8N7------
1 day agoN8N8CalmCalmSW4CalmCalmCalmCalm4NE9NE7N7NE7
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2 days agoNW5CalmCalmCalmCalmCalmS6CalmCalmCalm4N4E7E6SE7SE75
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Tide / Current Tables for Sausalito, Corps of Engineers Dock, San Francisco Bay, California
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Sausalito
Click for Map
Mon -- 02:08 AM PDT     Moonrise
Mon -- 03:10 AM PDT     0.12 feet Low Tide
Mon -- 06:34 AM PDT     Sunrise
Mon -- 10:23 AM PDT     4.37 feet High Tide
Mon -- 02:53 PM PDT     2.99 feet Low Tide
Mon -- 05:12 PM PDT     Moonset
Mon -- 07:48 PM PDT     Sunset
Mon -- 08:52 PM PDT     6.16 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.41.20.40.10.30.81.62.43.344.34.343.53.133.23.84.65.466.25.84.9

Tide / Current Tables for Richardson Bay Entrance, San Francisco Bay, California Current
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Richardson Bay Entrance
Click for Map
Mon -- 01:24 AM PDT     0.00 knots Slack
Mon -- 02:08 AM PDT     Moonrise
Mon -- 03:51 AM PDT     0.89 knots Max Flood
Mon -- 06:34 AM PDT     Sunrise
Mon -- 07:35 AM PDT     -0.01 knots Slack
Mon -- 10:43 AM PDT     -0.36 knots Max Ebb
Mon -- 01:10 PM PDT     0.00 knots Slack
Mon -- 03:25 PM PDT     0.68 knots Max Flood
Mon -- 05:12 PM PDT     Moonset
Mon -- 06:35 PM PDT     -0.00 knots Slack
Mon -- 07:48 PM PDT     Sunset
Mon -- 11:01 PM PDT     -0.91 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.5-0.10.40.80.90.80.60.2-0.1-0.3-0.3-0.4-0.2-00.30.60.70.50.2-0.1-0.4-0.6-0.8-0.9

Weather Map and Satellite Images
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wmap_P
GOES 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 (4,6,7,8)
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Ground Weather Radar Station Sacramento, CA
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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 numerious 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.