Wednesday, March29, 2017 L-36.com


Marine Weather and Tides
Walnut Creek, 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 6:54AMSunset 7:30PM Wednesday March 29, 2017 2:06 AM PDT (09:06 UTC) Moonrise 7:14AMMoonset 8:35PM Illumination 4% Phase: Waxing Crescent; Moon at 2 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- 940 Pm Pdt Tue Mar 28 2017
.small craft advisory in effect from Wednesday afternoon through Wednesday evening...
Tonight..NW winds 5 to 15 kt.
Wed..W winds 10 to 20 kt...with gusts to 25 kt in the afternoon.
Wed night..W winds 15 to 25 kt.
Thu..NW winds 10 to 20 kt.
Thu night..NW winds 5 to 15 kt.
Fri..N winds 15 to 25 kt.
Sat..NW winds 10 kt.
Sun..W winds 10 to 20 kt.
PZZ500 940 Pm Pdt Tue Mar 28 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Gusty northwest winds will continue over the coastal waters into Wednesday. Gusty westerly winds are possible over the bays by Wednesday evening. A cold front will sweep southeastward over the bay area early Thursday morning with a slight chance of showers. Surface high pressure will then build over far northern california Thursday and Friday resulting in near gale force northwest winds over the coastal waters for late week.

7 Day Forecast for Marine Location Near Walnut Creek, CA
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location: 37.9, -122.05     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 290603
afdmtr
area forecast discussion
national weather service san francisco bay area
1103 pm pdt Tue mar 28 2017

Synopsis A gradual warming trend will continue through
Wednesday as high pressure builds over the region. Cooler and
breezy conditions return on Thursday as a cold front sweeps
through the region. While a few light rain showers will be
possible, most locations will remain dry. The ridge will then
rebuild back over the region late in the week resulting in another
warming trend heading into the upcoming weekend.

Discussion As of 8:59 pm pdt Tuesday... Temperatures finished
off the day an average of 10 degrees warmer than yesterday across
most locations. Highs topped out in the 60s to mid 70s this
afternoon... About 5 to 10 degrees above average under sunny skies.

High pressure situated over the eastern pacific will continue to
ridge across northern california this evening resulting in
continued dry weather, clear skies and moderate to locally gusty
winds across the district. Windiest location persist across the
north and east bay mountains as well as select locations along the
coastal ranges. Temperatures will continue to climb Wednesday as
high pressure prevails. Highs in the mid 60s and 70s with a few
lower 80s expected in the afternoon.

A shift in the pattern is expected late Wednesday night as an
upper level low approaches from the north. The low and associated
cold front will then slides south across the region bringing a
slight chance of precipitation and cooler temperatures to the
area. Models continue to indicate that the greatest rain chances
will remain to the east with only a slight chance over the
forecast area for late Wednesday night into Thursday. Gusty winds
are also expected to accompany this system with strongest winds
anticipated over elevated terrain of the north and east bays as
well as along the coastal ranges. Breezy conditions will continue
into Friday with our local high resolution model indicating a
period of strong northerly winds late Thursday night into Friday
morning in the wake of this system. Strongest winds are expected
between 09z-15z Friday and will again impact the north and east
bay mountains as well as the coastal ranges with coastal waters
also being impacted. Slightly warmer temperatures are expected
Friday.

From previous discussion... High pressure is forecast to rebuild
back across the region late Friday into the upcoming weekend. As a
result, inland areas will rebound back into the 70s and lower 80s
with mostly sunny skies. Medium range guidance suggest dry
weather and seasonably mild temperatures will persist into early
next week as well with the ridge aloft. While confidence this far
out remains low, the models do hint at the potential return to a
wetter pattern late next week.

Aviation As of 11:02 pm pdt Tuesday...VFR persists this evening.

Lower level inversions have strengthened under mid-upper level
ridging which may provide the cap necessary for a more organized
stratus and/or fog pattern visiting the coastline as early as
Wednesday afternoon and evening. This would precede the passage of
a cold front Thursday morning thus an intrusion of stratus and/or
fog as well as some light rain or drizzle are increasingly likely
later Wednesday evening into Thursday morning. Low-moderate
confidence CIGS forecasts later half of the forecast period.

Vicinity of ksfo...VFR tonight and Wednesday, becoming MVFR briefly
ifr Wednesday evening with light rain or drizzle developing. Westerly
wind gusts to near 25 knots 19z-04z.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals...VFR except possibly could see local MVFR cigs
near sunrise Wednesday, otherwise it looks favorable forVFR in 06z
taf cycle. Ifr CIGS due to stratus and/or fog possibly developing
Wednesday evening and night.

Marine As of 10:39 pm pdt Tuesday... Gusty northwest winds will
continue over the coastal waters into Wednesday. Gusty westerly winds
are possible over the bays by Wednesday evening. A cold front will
sweep southeastward over the bay area early Thursday morning with
a slight chance of showers. Surface high pressure will then build
over far northern california Thursday and Friday resulting in near
gale force northwest winds over the coastal waters for late week.

Mtr watches/warnings/advisories
Tngt Sca... Pt arena to pt reyes 0-10 nm
sca... Pt reyes to pigeon pt 0-10 nm
sca... Pigeon pt to pt pinos 0-10 nm
sca... Pt pinos to pt piedras blancas 0-10 nm
sca... Pt arena to pigeon pt 10-60 nm
sca... Pigeon pt to pt piedras blancas 10-60 nm
sca... Rough bar advisory for sf bar
public forecast: cw
aviation/marine: canepa
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MZXC1 - 9415102 - Martinez-Amorco CA 10 mi48 min WNW 6 G 7 58°F 57°F1022.5 hPa47°F
UPBC1 10 mi48 min WNW 8 G 8.9
PCOC1 - 9415144 - Port Chicago, CA 11 mi48 min SSW 7 G 11 57°F 57°F1021.9 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 13 mi48 min W 7 G 13 65°F 1021.3 hPa
LNDC1 14 mi54 min E 1.9 G 2.9 58°F 1022.4 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 16 mi48 min S 2.9 G 4.1
OKXC1 - 9414776 - Oakland (Berth 34), CA 16 mi54 min Calm G 1 58°F 1022.5 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 16 mi48 min W 2.9 G 4.1 59°F 1022.2 hPa
AAMC1 - 9414750 - Alameda, CA 16 mi48 min W 1.9 G 5.1 58°F 60°F1022.9 hPa
OBXC1 17 mi48 min 58°F 52°F
PPXC1 - 9414847 - Richmond (Point Potrero), CA 17 mi48 min NE 1.9 G 2.9 61°F 1022.7 hPa
RCMC1 - 9414863 - Richmond, CA 19 mi48 min NNW 1.9 G 2.9 61°F 58°F1022.2 hPa
PXSC1 20 mi48 min 58°F 52°F
SFXC1 - San Francisco Bay Reserve, CA 21 mi81 min WSW 4.1 56°F 1022 hPa49°F
FTPC1 - 9414290 - San Francisco, CA 23 mi48 min SW 2.9 G 5.1 55°F 56°F1022.7 hPa
RTYC1 - 9414523 - Redwood City, CA 28 mi48 min SW 1.9 G 1.9 56°F 61°F1022 hPa
46237 - San Francisco Bar, CA (142) 32 mi66 min 55°F8 ft
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 43 mi76 min NW 18 G 21 55°F 55°F10 ft1022.7 hPa (-0.0)

Wind History for Union Pacific Rail Road Bridge (UPRR), CA
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Concord, Buchanan Field, CA6 mi13 minSSE 310.00 miFair55°F46°F74%1020.7 hPa
Oakland, Metro Oakland International Airport, CA16 mi13 minENE 410.00 miFair55°F51°F87%1022.5 hPa
Hayward, Hayward Air Terminal, CA17 mi12 minN 010.00 miFair55°F46°F72%1023.3 hPa
Livermore, Livermore Municipal Airport, CA18 mi13 minN 010.00 miFair49°F43°F80%1022 hPa

Wind History from CCR (wind in knots)
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Last 24hrSE3CalmSE5SE4SE4CalmSE44NW11NW13
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N10N10NE6N8W8NW4CalmS5S4CalmSE3
1 day agoSW4SW5W5W4SW5CalmW7NW7W10
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2 days agoSW5S6S4SW3SW4S5SW5S6S7S6S5SW3S8S11
G17
SW12S11S10S10S10W11W10SW9SW4W9

Tide / Current Tables for Suisun Point, Carquinez Strait, California
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Suisun Point
Click for Map
Wed -- 03:00 AM PDT     5.46 feet High Tide
Wed -- 06:57 AM PDT     Sunrise
Wed -- 08:13 AM PDT     Moonrise
Wed -- 09:44 AM PDT     0.13 feet Low Tide
Wed -- 03:46 PM PDT     4.90 feet High Tide
Wed -- 07:29 PM PDT     Sunset
Wed -- 09:35 PM PDT     Moonset
Wed -- 09:37 PM PDT     0.72 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
34.35.25.55.24.33.11.90.90.30.20.61.62.94.14.74.94.53.52.41.40.80.81.3

Tide / Current Tables for Stake Point .9 Mi NNW, Suisun Bay, California Current
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Stake Point .9 Mi NNW
Click for Map
Wed -- 02:25 AM PDT     1.06 knots Max Flood
Wed -- 05:27 AM PDT     -0.00 knots Slack
Wed -- 06:56 AM PDT     Sunrise
Wed -- 08:13 AM PDT     Moonrise
Wed -- 08:29 AM PDT     -0.84 knots Max Ebb
Wed -- 11:50 AM PDT     0.00 knots Slack
Wed -- 03:10 PM PDT     0.88 knots Max Flood
Wed -- 06:12 PM PDT     -0.00 knots Slack
Wed -- 07:28 PM PDT     Sunset
Wed -- 08:53 PM PDT     -0.68 knots Max Ebb
Wed -- 09:34 PM PDT     Moonset
Wed -- 11:38 PM PDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.50.8110.70.2-0.2-0.6-0.8-0.8-0.7-0.40.10.50.80.90.80.50.1-0.3-0.6-0.7-0.6-0.3

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 San Francisco/Monterey Bay Area, CA (5,6,7,8)
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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.