Saturday, July21, 2018 L-36.com


Marine Weather and Tides
Larkspur, CA

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7/21/2018 Trying to make page Mobile Friendly

Sunrise 6:03AMSunset 8:29PM Saturday July 21, 2018 6:23 PM PDT (01:23 UTC) Moonrise 2:28PMMoonset 12:38AM Illumination 67% 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 The San Francisco Bay North Of The Bay Bridge- 154 Pm Pdt Sat Jul 21 2018
.small craft advisory in effect until 10 pm pdt this evening...
Tonight..SW winds 10 to 20 kt...diminishing to 5 to 15 kt after midnight. Gusts up to 30 knots...becoming 25 kt after midnight.
Sun..SW winds 10 to 20 kt with gusts up to 30 kt.
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 154 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... A weak low pressure system off the coast will produce light to moderate winds over the coastal waters this 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 Larkspur, CA
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location: 37.94, -122.53     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 212330
afdmtr
area forecast discussion
national weather service san francisco bay area
430 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 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 4:30 pm pdt Saturday... For 00z tafs. Conditions
this evening similar to last evening with early return of ifr
ceilings at kmry and ksts. Ifr ceilings likely to develop at ksts
and koak by around 08z. Ksjc and klvk expected to remainVFR
overnight. Most uncertain forecast is once again for ksfo where
low ceilings may develop, but most likely late and around 12z.

Otherwise, expect clearing on Sunday to occur by 17z in most
areas. 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
up to 20 knots through early evening, otherwise light winds.

Sfo bridge approach... Similar to sfo.

Monterey bay terminals... Ifr ceilings likely by 01z and continuing
through 17z Sunday. Light winds.

Marine As of 01:57 pm pdt Saturday... A weak low pressure system
off the coast will produce light to moderate winds over the
coastal waters this 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 Sca... Sf bay until 10 pm
public forecast: bfg
aviation: dykema
marine: mm
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RCMC1 - 9414863 - Richmond, CA 6 mi41 min SSW 7 G 16 67°F 66°F1014.8 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 9 mi41 min SW 12 G 16 64°F 1015.3 hPa
FTPC1 - 9414290 - San Francisco, CA 10 mi41 min WSW 8 G 11 62°F 62°F1015.9 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 12 mi35 min WSW 6 G 16 64°F 1014.7 hPa
46237 - San Francisco Bar, CA (142) 12 mi53 min 61°F4 ft
PXSC1 12 mi41 min 65°F 61°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 14 mi35 min W 8.9 G 13
OBXC1 14 mi35 min 64°F 61°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 14 mi35 min W 9.9 G 13 64°F 1015.6 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 16 mi35 min SW 16 G 19 73°F 1013.5 hPa
AAMC1 - 9414750 - Alameda, CA 17 mi41 min W 9.9 G 13 65°F 71°F1015.8 hPa
LNDC1 17 mi35 min WNW 8.9 G 13 65°F 1015.6 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 21 mi33 min W 5.8 G 7.8 61°F 59°F1016.3 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 22 mi35 min SW 14 G 18 72°F1013.6 hPa
PRYC1 - 9415020 - Point Reyes, CA 24 mi35 min W 6 G 8.9 1015.7 hPa
PCOC1 - 9415144 - Port Chicago, CA 27 mi35 min WSW 14 G 19 1013.3 hPa
SFXC1 - San Francisco Bay Reserve, CA 32 mi98 min WNW 14 85°F 1013 hPa53°F
RTYC1 - 9414523 - Redwood City, CA 34 mi35 min NW 11 G 15 71°F 76°F1015 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 35 mi35 min WNW 14 G 18 85°F 1012.7 hPa
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 44 mi33 min SW 3.9 G 5.8 62°F 61°F6 ft1016.5 hPa (-0.3)
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 46 mi33 min W 3.9 G 5.8 60°F5 ft1016 hPa

Wind History for Richmond, CA
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Novato / Gnoss Field, CA14 mi28 minNW 9 G 1510.00 miFair84°F51°F33%1013.9 hPa
Petaluma Municipal Airport, CA22 mi48 minNW 8 G 1410.00 miFair73°F59°F61%1014.9 hPa
Oakland, Metro Oakland International Airport, CA23 mi30 minWNW 1610.00 miA Few Clouds66°F60°F81%1015.3 hPa
Napa, Napa County Airport, CA23 mi29 minSSW 1510.00 miFair78°F59°F52%1012.8 hPa
San Francisco, San Francisco International Airport, CA24 mi27 minWNW 1910.00 miA Few Clouds and Breezy67°F57°F71%1015 hPa

Wind History from DVO (wind in knots)
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Last 24hrSW11N10
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N5N9N8N11N12
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N9N9N8NW8N7N4CalmCalmCalmCalmCalm4SW6NE7SW11W11
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1 day agoN14N11N11N8N8N7N7N6N9NW7NW6NW4CalmNW7N6N6NE6Calm5
G11
4E84SW13SW10
2 days agoN11N10N13N12N10N9N7N8NW6CalmCalmNW4NW7CalmCalmCalmN4Calm54NE6
G12
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G19

Tide / Current Tables for Corte Madera Creek, San Francisco Bay, California
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Corte Madera Creek
Click for Map
Sat -- 01:38 AM PDT     Moonset
Sat -- 02:42 AM PDT     0.85 feet Low Tide
Sat -- 06:04 AM PDT     Sunrise
Sat -- 08:56 AM PDT     4.00 feet High Tide
Sat -- 02:05 PM PDT     1.95 feet Low Tide
Sat -- 03:27 PM PDT     Moonrise
Sat -- 08:28 PM PDT     Sunset
Sat -- 08:33 PM PDT     6.04 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.41.510.91.21.82.63.33.843.83.32.72.222.12.73.64.65.4665.54.5

Tide / Current Tables for Point San Quentin 1.9 mi E, San Francisco Bay, California Current
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Point San Quentin 1.9 mi E
Click for Map
Sat -- 12:36 AM PDT     -2.03 knots Max Ebb
Sat -- 01:38 AM PDT     Moonset
Sat -- 04:40 AM PDT     0.00 knots Slack
Sat -- 06:03 AM PDT     Sunrise
Sat -- 07:36 AM PDT     1.24 knots Max Flood
Sat -- 10:20 AM PDT     -0.00 knots Slack
Sat -- 01:01 PM PDT     -1.10 knots Max Ebb
Sat -- 03:27 PM PDT     Moonrise
Sat -- 04:27 PM PDT     0.00 knots Slack
Sat -- 07:20 PM PDT     1.21 knots Max Flood
Sat -- 08:27 PM PDT     Sunset
Sat -- 10:07 PM PDT     -0.01 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-2-2-1.8-1.4-0.60.30.91.21.20.90.3-0.5-1-1.1-1-0.8-0.30.40.91.21.10.80.1-0.9

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.
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Wind Forecast for San Francisco/Monterey Bay Area, CA (21,6,7,8)
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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.