Sunday, July22, 2018 L-36.com


Marine Weather and Tides
Santa Venetia, CA

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What's New / NOTES
7/21/2018 Trying to make page Mobile Friendly

Sunrise 6:03AMSunset 8:29PM Saturday July 21, 2018 11:56 PM PDT (06:56 UTC) Moonrise 2:28PMMoonset 12:38AM Illumination 69% Phase: Waxing Gibbous; Moon at 9 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 San Francisco Bay North Of The Bay Bridge- 854 Pm Pdt Sat Jul 21 2018
.small craft advisory in effect until 10 pm pdt this evening...
Tonight..SW winds 15 to 25 kt...diminishing to 5 to 15 kt after midnight.
Sun..SW winds 5 to 15 kt increasing to 10 to 20 kt with gusts up to 30 kt in the afternoon.
Sun night..SW winds 10 to 20 kt with gusts up to 30 kt.
Mon..SW winds 15 to 25 kt with gusts up to 35 kt.
Mon night..SW winds 10 to 20 kt with gusts up to 30 kt.
Tue..SW winds 10 to 20 kt with gusts up to 30 kt.
Tue night..W winds 10 to 20 kt with gusts up to 30 kt.
Wed..W winds 10 to 20 kt.
Thu..SW winds 10 to 20 kt.
PZZ500 854 Pm Pdt Sat Jul 21 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Mostly light winds are forecast to persist across the coastal waters through the remainder of the weekend. Northwesterly winds are then forecast to increase through much of the coming week. Two long period southerly swells will impact the region this weekend and early next week.

7 Day Forecast for Marine Location Near Santa Venetia, CA
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location: 38.02, -122.5     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 220538
afdmtr
area forecast discussion
national weather service san francisco bay area
1038 pm pdt Sat jul 21 2018

Synopsis Seasonable conditions will remain in place through
Monday. High pressure will build over the region for the middle
part of the week bringing hot temperatures to interior areas and
in the mountains.

Discussion As of 8:59 pm pdt Saturday... It was another warm,
but seasonal july day across the bay area, with observed high
temperatures ranging from the upper 60s lower 70s along the coast
to mid-upper 90s inland. Today's hot spot was at bradley, in
southern monterey county, with the raws hitting 101f at that
location. Expect very similar temperatures across the bay area on
Sunday. Tonight's 00z oak sounding continues to show the presence
of monsoonal moisture in the air, recording a pw value of 1.61",

06" shy of tying the daily MAX record the presence of this
moisture will keep low temperatures about 5 degrees above seasonal
normal tonight.

Visible satellite imagery shows almost a carbon copy of what was
occurring this time yesterday, with stratus low clouds hugging the
entire immediate coastline between sonoma county and monterey
county. And similar to last night, expect this stratus to push
inland into the adjacent valleys through sunrise Sunday.

No major changes were made to the forecast since this afternoon's
package. A heat advisory remains in effect between noon pdt
Tuesday and 9 pm pdt Wednesday for the following areas: east bay
hills, southern salinas valley, los padres national forest, santa
lucia mountains, and interior monterey san benito counties.

The previous discussion remains valid and is included below.

Prev discussion As of 01:57 pm pdt Saturday... A few clouds continue
to stream over the bay area and monterey bay regions this
afternoon as seen on visible satellite, while day time high temps
continue to warm to seasonable norms. Sunday and Monday will
continue to reflect normal july conditions with low clouds and fog
along the coast overnight and near normal temps across the region
each day. Monsoonal moistures remains to our east, mainly
impacting the sierras.

The area of forecast for this afternoons forecast package is the
heat that will creep into the area Tuesday through Thursday. 500
mb high pressure over the 4 corners region will drift to the west
the next couple days, then set up shop near the ca az border. As
it makes the shift the high pressure will strengthen to near 599
dam, ridging into the bay area region and causing subsidence in
the air column. As this pattern sets up looking for a quick heat
up on Tuesday and remaining into Thursday. Since our area of
responsibility will be on the edge of the heat dome, the main
areas of focus will be for the SE portion of monterey county, most
of san benito county, and the eastern portion of santa clara
county. It will also cook for the far NE portion of napa county
Tuesday and Wednesday. Onshore flow is expected to remain in place
and keep the remainder of the bay area only a little above
seasonal averages. We will be watching how the winds are shaping
up over the coming days. If the winds calm on Tuesday Wednesday
afternoon, effectively eliminating the onshore push, temps could
ramp up in the bay area core. Models are not indicating this
currently, but bears watching. With this synoptic scale pattern
change coming and the ridge bringing in 850 mb temps around 25c,
we went ahead and took the preemptive step of issuing a heat
advisory with significant lead time. The heat advisory will start
around 11 am on Tuesday and run through Wednesday at 9 pm. Due to
the warm airmass aloft, the overnight lows in the hills and
mountains will be rather high, likely in the 70s and low 80s.

Valleys will dip into the 50s and 60s, so the heat recovery
overnight will be for lower elevations. This is why the heat
advisory covers mainly elevated terrain. If models hold true, the
heat advisory may need to be extended into Thursday, as it looks
much like the setup taking place on Tuesday.

Friday will bring a noticeable change as the dome of high
pressure is forecast to shift to the east again due to low
pressure moving into the pac nw. This pattern will help to shift
the heat out and bring the region back into seasonable norms.

Overall... Typical july conditions Sunday Monday followed by an
interior heat up Tuesday through Thursday with a week punctuated
by a return to seasonal norms.

Aviation As of 10:40 pm pdt Saturday... For 06z tafs.

Conditions tonight similar to last night except slightly earlier
development of low ceilings at koak. Ifr ceilings likely to
develop at ksts by around 07z. Ksjc and klvk expected to remain
vfr overnight. Most difficult forecast is once again for ksfo
where low ceilings may develop, but most likely not until 12z.

Otherwise, expect clearing on Sunday to occur by 17z in most areas
with earlier return of low clouds likely on Sunday evening. Light
to moderate onshore winds.

Vicinity of ksfo...VFR for most of period. Ifr ceilings may
develop between 12-16z but confidence is rather low. West winds
between 15-20 knots late afternoon and evening hours, otherwise
light winds.

Sfo bridge approach... Similar to sfo.

Monterey bay terminals... Ifr ceilings continuing through 17z
Sunday with occasional MVFR visibility. Early return of ifr
conditions on Sunday evening, likely by 00z. Light winds.

Marine As of 8:54 pm pdt Saturday... Mostly light winds are
forecast to persist across the coastal waters through the
remainder of the weekend. Northwesterly winds are then forecast to
increase through much of the coming week. Two long period
southerly swells will impact the region this weekend and early
next week.

Mtr watches warnings advisories
Tngt None.

Public forecast: bam bfg
aviation: dykema
marine: dykema
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RCMC1 - 9414863 - Richmond, CA 8 mi45 min WSW 6 G 8.9 61°F 65°F1017.2 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 11 mi39 min SW 6 G 8 1017.7 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 13 mi39 min SW 11 G 14 63°F 1016.7 hPa
FTPC1 - 9414290 - San Francisco, CA 15 mi45 min WSW 11 G 15 60°F 61°F1017.6 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 16 mi39 min W 6 G 11 60°F 1016.5 hPa
PXSC1 16 mi45 min 62°F 61°F
OBXC1 17 mi39 min 62°F 61°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 17 mi39 min W 8.9 G 13 62°F 1017.6 hPa
46237 - San Francisco Bar, CA (142) 18 mi57 min 60°F4 ft
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 18 mi45 min W 7 G 9.9
LNDC1 19 mi39 min W 2.9 G 5.1 63°F 1017.6 hPa
AAMC1 - 9414750 - Alameda, CA 20 mi45 min WNW 4.1 G 5.1 62°F 70°F1017.7 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 20 mi39 min 69°F
PRYC1 - 9415020 - Point Reyes, CA 25 mi45 min Calm G 1.9 62°F1017.7 hPa
PCOC1 - 9415144 - Port Chicago, CA 25 mi39 min W 18 G 21 65°F 71°F1016.2 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 26 mi37 min WSW 3.9 G 5.8 60°F 59°F1018.4 hPa
SFXC1 - San Francisco Bay Reserve, CA 28 mi72 min W 11 64°F 1016 hPa58°F
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 33 mi39 min NW 17 G 23 68°F 1015.1 hPa
RTYC1 - 9414523 - Redwood City, CA 39 mi39 min NNW 4.1 G 5.1 64°F 76°F1017.8 hPa
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 45 mi37 min SW 1.9 G 3.9 60°F1017.9 hPa

Wind History for Richmond, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Novato / Gnoss Field, CA9 mi82 minNNW 810.00 miFair63°F57°F83%1016.9 hPa
Petaluma Municipal Airport, CA17 mi62 minWNW 88.00 miOvercast61°F59°F94%1017.6 hPa
Napa, Napa County Airport, CA18 mi63 minW 1110.00 miFair63°F55°F78%1015.8 hPa
Concord, Buchanan Field, CA24 mi64 minW 410.00 miFair68°F52°F57%1015 hPa

Wind History from DVO (wind in knots)
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Last 24hrN12
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1 day agoN7N6N9NW7NW6NW4CalmNW7N6N6NE6Calm5
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2 days agoN7N8NW6CalmCalmNW4NW7CalmCalmCalmN4Calm54NE6
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Tide / Current Tables for Gallinas, Gallinas Creek, San Pablo Bay, California
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Gallinas
Click for Map
Sun -- 02:13 AM PDT     Moonset
Sun -- 04:15 AM PDT     0.44 feet Low Tide
Sun -- 06:04 AM PDT     Sunrise
Sun -- 10:57 AM PDT     4.19 feet High Tide
Sun -- 03:38 PM PDT     2.15 feet Low Tide
Sun -- 04:25 PM PDT     Moonrise
Sun -- 08:27 PM PDT     Sunset
Sun -- 10:00 PM PDT     6.19 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
4.22.81.60.80.50.611.82.63.444.23.93.42.72.22.22.63.34.25.25.96.25.9

Tide / Current Tables for Petaluma River Approach #3/#4, San Pablo Bay, California Current
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Petaluma River Approach #3/#4
Click for Map
Sun -- 02:01 AM PDT     -0.87 knots Max Ebb
Sun -- 02:12 AM PDT     Moonset
Sun -- 05:14 AM PDT     0.00 knots Slack
Sun -- 06:04 AM PDT     Sunrise
Sun -- 07:37 AM PDT     0.52 knots Max Flood
Sun -- 11:10 AM PDT     -0.00 knots Slack
Sun -- 01:48 PM PDT     -0.48 knots Max Ebb
Sun -- 03:56 PM PDT     0.00 knots Slack
Sun -- 04:25 PM PDT     Moonrise
Sun -- 06:38 PM PDT     0.69 knots Max Flood
Sun -- 08:27 PM PDT     Sunset
Sun -- 10:54 PM PDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.6-0.8-0.9-0.8-0.5-0.10.30.50.50.40.30-0.2-0.4-0.5-0.300.40.70.70.60.50.2-0

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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Wind Forecast for San Francisco/Monterey Bay Area, CA (2,6,7,8)
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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.