Wednesday, August21, 2019 L-36.com


Marine Weather and Tides
Tomales, 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 6:29AMSunset 7:58PM Wednesday August 21, 2019 8:26 AM PDT (15:26 UTC) Moonrise 10:23PMMoonset 11:08AM Illumination 65% Phase: Waning Gibbous; Moon at 21 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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PZZ540 Coastal Waters From Point Arena To Point Reyes California Out To 10 Nm- 256 Am Pdt Wed Aug 21 2019
.small craft advisory in effect through Thursday evening...
Today..NW winds 15 to 25 kt with gusts up to 30 kt. Wind waves 4 to 5 ft. NW swell 2 to 4 ft at 11 seconds.
Tonight..NW winds 15 to 25 kt with gusts up to 30 kt. Wind waves 4 to 5 ft. W swell 5 to 7 ft at 12 seconds.
Thu..NW winds 15 to 25 kt with gusts up to 30 kt. W swell 6 to 8 ft at 11 seconds and sw around 2 ft at 20 seconds.
Thu night..NW winds 15 to 20 kt with gusts up to 25 kt. NW swell 6 to 8 ft at 10 seconds and sw around 2 ft at 18 seconds.
Fri..SE winds 10 to 15 kt. NW swell 6 to 8 ft at 10 seconds and sw around 2 ft at 18 seconds.
Fri night..SE winds 5 to 10 kt. NW swell 4 to 6 ft at 10 seconds and sw around 2 ft at 16 seconds.
Sat..W winds 5 to 10 kt. Wind waves 2 to 3 ft. NW swell 3 to 5 ft and sw around 2 ft.
Sun..NW winds 5 to 10 kt. Wind waves 2 to 3 ft. W swell 3 to 4 ft and sw around 2 ft.
PZZ500 256 Am Pdt Wed Aug 21 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Light to moderate northwest winds will persist across the coastal waters through mid-week as high pressure sits over the eastern pacific and low pressure develops over central california. Locally gusty coastal jets are forecast south of point arena, pigeon point, and point sur that will create hazardous seas conditions for smaller vessels. Breezy afternoon and evening winds are also forecast over the san francisco bay as well as over the Monterey bay. Mixed seas will continue with shorter period northwest waves at around 8 to 10 seconds, a light longer period west swell, and a light southerly swell.


7 Day Forecast for Marine Location Near Tomales, CA
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location: 38.19, -122.92     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 211404 cca
afdmtr
area forecast discussion
national weather service san francisco bay area
458 am pdt Wed aug 21 2019

Synopsis High pressure over central and southern california
will kick off a warming trend through Thursday and will compress
the marine layer along the coast leading to significantly less
night and morning low clouds. Seasonable temperatures are forecast
through the upcoming weekend, along with continued dry conditions.

Discussion As of 3:53 am pdt Wednesday... An interesting
weather pattern is currently in place over the west coast with
california nuzzled between a ridge of high pressure to the east
and a ridge of high pressure to the west while a trough of low
pressure passes through the region. High pressure at the surface
presently centered over the four-corners region compressed the
marine layer along the coast resulted in little to no marine layer
overnight. Currently only a few patches of stratus are visible by
satellite over the coastal waters and locally inland over coastal
hills and peaks. Gradients have seen little change overnight with
the northerly gradients remaining around 3 mb while the onshore
gradient from sfo to wmc weakened slightly to around 2 mb.

Model guidance continues to depict a warming trend through
Thursday before temperatures plateau maintaining seasonably warm
temperatures across the region through the remainder of the week and
through the weekend. 850 mb temperatures will warm to around 22 c by
this afternoon then cool on Thursday in response to the trough
aloft. However strong ridging at the surface appears to counteract
any cooling resulting in relatively little change through the rest
of the forecast period. Mostly clear skies will also aid this
warming trend to get off to an earlier start today and Thursday.

Prev discussion As of 9:53 pm pdt Tuesday... The boundary layer
winds will turn more northerly on weds which will induce some
adiabatic warming. Model guidance suggests many of the north and
east bay valleys will warm into the upper 80s and lower 90s on
weds which will be as much as 10 degrees warmer than what was
observed on Tuesday.

One item to watch on weds night is some potentially gusty
northerly winds in the hills. 00z NAM has 20-30 kt winds at 925 mb
(around 2500 feet) from sonoma to monterey late weds afternoon
into weds night. Not expecting any wind advisories but could be a
brief fire weather concern.

Pattern looks to continue with above normal warming trend for
inland areas Thursday and Friday as the ridge builds over the
region with potential for the thermal trough to straddle the coast
at times keeping marine stratus to a minimum. Long range trends
remain warm and dry. Will be watching the tropical activity as it
heads north from baja next week. Current ECMWF would bring
remnants of our coast by about next Thursday... A long ways off.

Aviation As of 5:00 am pdt Wednesday... Marine layer is poorly
defined this morning with only a few patches of stratus along the
coast south of the golden gate. This is likely due to the
influence of the incoming trough and cool temps aloft mixing out
the marine layer. Trends over the past few hours have been a slow
expansion of the stratus but don't expect widespread CIGS to
develop this morning. Patchy CIGS may be possible through the
morning mainly around monterey bay and possibly san francisco bay.

Northwest winds this evening will strengthen around 2000 feet agl
creating some potential for low level wind shear but magnitude too
low to include in tafs at this time. These winds are also likely
to keep stratus development tonight reduced.

Vicinity of ksfo... Patchy CIGS possible through 17z but any cigs
should remain limited. West winds increasing after 21z to around
20kt with gusts near 30kt expected.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... Patchy MVFR ifr CIGS this morning clearing
after 17z. Onshore winds 10-15 kt this afternoon. Patchy ifr MVFR
cigs returning overnight tonight.

Marine As of 2:56 am pdt Wednesday... .Light to moderate
northwest winds will persist across the coastal waters through
mid-week as high pressure sits over the eastern pacific and low
pressure develops over central california. Locally gusty coastal
jets are forecast south of point arena, pigeon point, and point
sur that will create hazardous seas conditions for smaller
vessels. Breezy afternoon and evening winds are also forecast over
the san francisco bay as well as over the monterey bay. Mixed
seas will continue with shorter period northwest waves at around
8 to 10 seconds, a light longer period west swell, and a light
southerly swell.

Mtr watches warnings advisories
Tday Sca... Sf bay from 12 pm
sca... Mry bay from 12 pm
sca... Pigeon pt to pt pinos 0-10 nm from 12 pm
sca... Pt pinos to pt piedras blancas 0-10 nm
sca... Pt arena to pt reyes 0-10 nm
sca... Pt reyes to pigeon pt 0-10 nm from 12 pm
public forecast: cw
aviation: st
marine: st
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PRYC1 - 9415020 - Point Reyes, CA 14 mi57 min 59°F1015.3 hPa
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 21 mi37 min NW 18 G 19 54°F4 ft1015.3 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 30 mi37 min NW 14 G 18 60°F 57°F4 ft1016 hPa
46237 - San Francisco Bar, CA (142) 32 mi57 min 60°F3 ft
TIBC1 - Tiburon Pier, San Francisco Bay, CA 32 mi52 min SW 5.1 61°F 1016 hPa
RCMC1 - 9414863 - Richmond, CA 33 mi57 min 66°F
46214 - Point Reyes, CA (029) 34 mi57 min 56°F4 ft
PPXC1 - 9414847 - Richmond (Point Potrero), CA 35 mi57 min S 8.9 G 9.9 62°F 1015.6 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 36 mi57 min SW 5.1 G 6 63°F 1014.6 hPa
FTPC1 - 9414290 - San Francisco, CA 36 mi63 min SE 1 G 2.9 60°F 62°F1015.5 hPa
PXSC1 39 mi117 min 62°F 58°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 39 mi57 min NNW 1 G 2.9 61°F 1014.2 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 41 mi57 min SSW 7 G 11 61°F 1015.4 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 41 mi63 min SSW 8.9 G 12
OBXC1 41 mi57 min 61°F 60°F
MZXC1 - 9415102 - Martinez-Amorco CA 43 mi63 min WNW 5.1 G 6 64°F 71°F1014.9 hPa
LNDC1 43 mi57 min SSE 2.9 G 4.1 62°F 1015.3 hPa
AAMC1 - 9414750 - Alameda, CA 44 mi63 min E 1.9 G 1.9 62°F 69°F1015.8 hPa
UPBC1 44 mi57 min NW 4.1 G 6
SFXC1 - San Francisco Bay Reserve, CA 47 mi102 min W 4.1 61°F 1014 hPa57°F
PCOC1 - 9415144 - Port Chicago, CA 48 mi57 min SSW 6 G 8.9 62°F 71°F1014.8 hPa

Wind History for Point Reyes, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Petaluma Municipal Airport, CA17 mi32 minN 06.00 miFog/Mist59°F57°F94%1015.6 hPa
Novato / Gnoss Field, CA20 mi52 minN 010.00 miFair57°F55°F94%1015.2 hPa
Santa Rosa, Santa Rosa Sonoma County Airport, CA23 mi34 minN 010.00 miA Few Clouds57°F55°F96%1014.5 hPa

Link to 5 minute data for KO69

Wind History from O69 (wind in knots)
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Last 24hrNW4CalmNW4W7SW5W10
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CalmN3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalm
1 day agoCalmCalmCalmCalm3CalmW9NW6
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W9W8W7CalmCalm5NW3CalmCalmCalmW6CalmNW4W4W4
2 days agoCalmCalmCalm3Calm46NW5
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NW5NW5NW5CalmNW3NW4NW3N5SW4SW4CalmCalmCalm

Tide / Current Tables for Blakes Landing, Tomales Bay, California
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Blakes Landing
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Wed -- 04:19 AM PDT     3.76 feet High Tide
Wed -- 06:31 AM PDT     Sunrise
Wed -- 10:49 AM PDT     1.36 feet Low Tide
Wed -- 12:08 PM PDT     Moonset
Wed -- 04:51 PM PDT     4.59 feet High Tide
Wed -- 07:57 PM PDT     Sunset
Wed -- 11:23 PM PDT     Moonrise
Wed -- 11:53 PM PDT     1.38 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.82.32.93.43.73.73.42.92.31.81.51.41.72.33.13.84.44.64.43.93.22.51.91.5

Tide / Current Tables for Point Reyes, California Current
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Point Reyes
Click for Map
Wed -- 01:34 AM PDT     0.67 knots Max Flood
Wed -- 04:35 AM PDT     -0.00 knots Slack
Wed -- 06:32 AM PDT     Sunrise
Wed -- 07:27 AM PDT     -0.83 knots Max Ebb
Wed -- 10:36 AM PDT     0.00 knots Slack
Wed -- 12:08 PM PDT     Moonset
Wed -- 01:48 PM PDT     0.72 knots Max Flood
Wed -- 04:51 PM PDT     -0.00 knots Slack
Wed -- 07:57 PM PDT     -0.97 knots Max Ebb
Wed -- 07:57 PM PDT     Sunset
Wed -- 11:23 PM PDT     Moonrise
Wed -- 11:40 PM PDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.40.60.60.50.2-0.1-0.5-0.8-0.8-0.5-0.20.10.40.60.70.60.3-0.1-0.5-0.8-1-0.8-0.5-0.2

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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for San Francisco/Monterey Bay Area, CA (11,2,3,4)
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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.