Monday, May22, 2017 L-36.com


Marine Weather and Tides
Discovery Bay, CA

Version 3.4
What's New / NOTES
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 5:48AMSunset 8:16PM Monday May 22, 2017 10:37 AM PDT (17:37 UTC) Moonrise 2:57AMMoonset 3:46PM Illumination 9% Phase: Waning Crescent; Moon at 27 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- 902 Am Pdt Mon May 22 2017
.small craft advisory in effect from noon today to 9 pm pdt this evening...
Today..W to sw winds 5 to 15 kt...increasing to 15 to 25 kt in the afternoon..
Tonight..W to sw winds 15 to 25 kt...decreasing to 5 to 15 kt overnight..
Tue..SW winds 10 to 20 kt.
Tue night..SW winds 10 to 20 kt.
Wed..SW winds 15 to 25 kt.
Thu..SW winds 5 to 15 kt.
Fri..SW winds 5 to 15 kt.
PZZ500 902 Am Pdt Mon May 22 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... High pressure building over the pacific northwest will maintain light to moderate northwesterly winds through midweek. Winds will increase midweek as a thermal trough develops along the coast tightening the pressure gradients over the northern outer waters. Strongest winds are expected over the outer waters while the inner waters remain mostly light.

7 Day Forecast for Marine Location Near Discovery Bay, CA
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location: 37.89, -121.49     debug


Area Discussion for - Sacramento, CA
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Fxus66 ksto 221615
afdsto
area forecast discussion
national weather service sacramento ca
915 am pdt Mon may 22 2017

Synopsis
Norcal's first triple digit heat of the season will continue for
portions of the central valley today and Tuesday. Cooling
trend begins Wednesday with near to slightly below normal temperatures
by Friday. Isolated late day showers or thunderstorms possible
over portions of the mountains Tuesday and Wednesday.

.Discussion (today through Thursday)
high amplitude upper ridge over the epac extends inland resulting
in well above normal temperatures over interior norcal. Triple
digit heat expected in portions of the central valley today with
hottest readings forecast in the northern sacramento valley.

Marine layer is around 1300 ft deep and flow through the delta is
only around 15 kts so cooling influence into the valley will be
nill today. Models showing some afternoon instability over the
sierra nevada but available moisture looks too limited for deep
moist convection.

Upper ridging gets suppressed slightly over norcal Tuesday as
northern portions of it progress into the great basin, ahead of
short wave system tracking towards the pacnw. Little change
expected in MAX temps Tuesday with possible exception of slightly
more delta breeze influence into the southern sacramento valley.

High temperatures Tuesday continue above the century mark in the
northern and central sacramento valley. Mid to upper 90s expected
for the southern sac/northern san joaquin portions of the central
valley. Slight increase in available moisture and instability
Tuesday over the sierra nevada, south of us-50, may result in
isolated afternoon showers or thunderstorms.

Marine layer deepens Tuesday night as upper low approaches and
onshore flow increases. Models showing strong flow through the
delta developing overnight Tuesday into Wednesday. Weak cold
front progged to drop from the pacnw across northern portions of
ca on Wednesday as short wave system digs into the great basin and
expands westward. This will begin a cooling trend Wednesday that
continues through the remainder of the week. Slight chance of
showers or thunderstorms possible over the shasta and coastal
mountains Wednesday afternoon into evening.

Cooling continues Thursday with more stable ams. 80s expected
throughout the central valley with 70s in the delta and
foothills, and mainly 50s to 60s in the mountains.

Pch
.Extended discussion (Friday through Monday)
troughing over the area on Friday will lead to cooler
temperatures, especially near the delta with onshore flow. Ridging
builds back in for memorial day weekend with warming
temperatures. Continued onshore flow will keep delta and southern
sac valley noticeably cooler than the northern sac valley where
afternoon highs will top out in the mid to upper 90s. Enough
instability around with weak disturbances in the flow to warrant
the chance for showers and thunderstorms across the mountains, but
valley should remain dry.

Ceo

Aviation
Vfr conditions the next 24 hours. Variable winds less than 10 kts
at valley TAF sites.

Sto watches/warnings/advisories
None.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 23 mi61 min NW 12 G 16 64°F 1013.8 hPa
PCOC1 - 9415144 - Port Chicago, CA 31 mi61 min W 11 G 15 60°F 64°F1014.6 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 35 mi61 min WNW 15 G 18 57°F 65°F1015.1 hPa56°F
UPBC1 35 mi61 min NW 12 G 15
SFXC1 - San Francisco Bay Reserve, CA 36 mi112 min WNW 7 64°F 1014 hPa56°F
LNDC1 42 mi61 min WSW 2.9 G 5.1 56°F 1015.7 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 43 mi61 min W 6 G 8.9 57°F 1015.2 hPa
AAMC1 - 9414750 - Alameda, CA 44 mi61 min SW 2.9 G 4.1 56°F 64°F1016.2 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 45 mi61 min Calm G 1
OBXC1 45 mi61 min 55°F 53°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 45 mi61 min NNW 2.9 G 4.1 55°F 1015.8 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 46 mi61 min SSW 8.9 G 13 54°F 1016 hPa
RTYC1 - 9414523 - Redwood City, CA 47 mi61 min NNE 2.9 G 5.1 58°F 68°F1015.1 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 48 mi61 min ENE 2.9 G 4.1 55°F 1014.6 hPa
PXSC1 48 mi61 min 57°F 53°F
RCMC1 - 9414863 - Richmond, CA 49 mi61 min S 5.1 G 7 55°F 58°F1015.5 hPa

Wind History for Port Chicago, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Stockton, Stockton Metropolitan Airport, CA13 mi42 minNW 810.00 miFair82°F51°F34%1013.8 hPa
Livermore, Livermore Municipal Airport, CA22 mi44 minVar 310.00 miFair71°F53°F53%1014.3 hPa

Wind History from SCK (wind in knots)
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Last 24hr4W6W4CalmN8N5NW8W5
G15
NW8NW9NW10NW7NW9NW8CalmNE3N4W3W4NW6NW5NW6NW3NW8
1 day agoNW54454W76NW10NW9NW12W11NW7W6W7N5E5NE5CalmCalmCalmCalmSW4W3NW9
2 days ago33W6N64NW6NW9W12NW11NW9NW10W10W6W8W6NE3E3CalmCalmCalmCalmW5W7NW6

Tide / Current Tables for Borden Highway Bridge, Middle River, San Joaquin River, California
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Borden Highway Bridge
Click for Map
Mon -- 03:57 AM PDT     Moonrise
Mon -- 04:36 AM PDT     3.12 feet High Tide
Mon -- 05:50 AM PDT     Sunrise
Mon -- 11:27 AM PDT     0.19 feet Low Tide
Mon -- 04:45 PM PDT     Moonset
Mon -- 05:09 PM PDT     2.47 feet High Tide
Mon -- 08:15 PM PDT     Sunset
Mon -- 10:58 PM PDT     0.38 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.71.42.12.73.13.12.82.21.60.90.50.20.20.61.21.82.32.52.41.91.40.80.50.4

Tide / Current Tables for Brandt Bridge, San Joaquin River, California Current
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Brandt Bridge
Click for Map
Mon -- 12:22 AM PDT     0.00 knots Slack
Mon -- 03:08 AM PDT     0.76 knots Max Flood
Mon -- 03:56 AM PDT     Moonrise
Mon -- 05:49 AM PDT     Sunrise
Mon -- 06:01 AM PDT     -0.01 knots Slack
Mon -- 09:46 AM PDT     -1.06 knots Max Ebb
Mon -- 01:35 PM PDT     0.00 knots Slack
Mon -- 04:04 PM PDT     0.55 knots Max Flood
Mon -- 04:44 PM PDT     Moonset
Mon -- 06:28 PM PDT     -0.00 knots Slack
Mon -- 08:14 PM PDT     Sunset
Mon -- 09:43 PM PDT     -0.83 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.20.30.60.80.70.40-0.5-0.8-1-1.1-1-0.7-0.30.20.50.50.50.2-0.2-0.6-0.8-0.8-0.7

Weather Map and Satellite Images
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Weather Map
wmap_P
IR Satellite Image from GEOS
west_satellite

GOES Local Image of CentralWestCoast    EDIT
Geos

Wind Forecast for Sacramento, CA (13,3,4,5)
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Ground Weather Radar Station Sacramento, 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 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.