Monday, April23, 2018 L-36.com


Marine Weather and Tides
Piedmont, CA

Version 3.4
What's New / NOTES
3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.

Sunrise 6:19AMSunset 7:53PM Monday April 23, 2018 2:29 AM PDT (09:29 UTC) Moonrise 12:23PMMoonset 1:49AM Illumination 56% Phase: First Quarter Moon; Moon at 8 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
    EDIT      (on/off)   Help
PZZ530 San Pablo Bay Suisun Bay The West Delta And San Francisco Bay North Of The Bay Bridge- 902 Pm Pdt Sun Apr 22 2018
Tonight..SW winds 5 to 15 kt.
Mon..SW winds 5 to 15 kt.
Mon night..SW winds 5 to 15 kt.
Tue..SW winds 5 to 15 kt.
Tue night..SW winds 10 to 20 kt.
Wed..SW winds 15 to 25 kt...decreasing to 5 to 15 kt.
Thu..W winds 5 to 15 kt.
Fri..SW winds 5 to 15 kt.
PZZ500 902 Pm Pdt Sun Apr 22 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... High pressure over the eastern pacific will maintain moderate northwesterly winds across the northern waters through late tonight. Winds will ease across the region as the pressure gradient weakens through much of the week. Light to moderate seas will prevail through the forecast period.

7 Day Forecast for Marine Location Near Piedmont, CA
   Hourly   EDIT   Help
location: 37.85, -122.22     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus66 kmtr 230633
afdmtr
area forecast discussion
national weather service san francisco bay area
1133 pm pdt Sun apr 22 2018

Synopsis Dry and seasonable weather for much of the upcoming
work week. An upper low may approach Friday with a slight chance
of showers, mainly for the north bay but most likely scenario is
all locations stay dry with a modest cooling trend by late in the
week into next weekend.

Discussion As of 8:37 pm pdt Sunday... Temperatures are settling
back nicely this evening under a mainly clear sky, wrapping up a
weekend of mainly clear, mild to warm daytime weather. High pressure
remains in place keeping dry weather and warmer daytime temperatures
going through mid week. The 250 mb jet stream over the eastern pacific
will carve out a closed mid to upper level low pressure system
later this week. Today's 12z ECMWF showed additional jet stream
energy carving out another mid to upper level low farther upstream
over the pacific eventually being the "kicker trough" that moves
the first closed low forward to northern california and the
pacific northwest bringing a slight chance of showers into the bay
area later Friday night into Saturday. However, GFS output is at
odds with the ECMWF solution generally showing higher latitude
northwesterly flow and shortwave energy pouring in bringing a few
more chances of rain into early next week. Either way it looks
like some unsettled, chilly, wetter weather arriving late week and
early next week. The ECMWF solution, if verified, could tap more
in the way of subtropical moisture.

Prev discussion As of 2:05 pm pdt Sunday... Skies are mostly sunny
this Sunday afternoon with just some thin high clouds over the
region. Temperatures range from around 60 at the beaches, 60s
around the bay and mid 70s inland with lower 80s showing up
around stockton. Current dewpoint readings in the mid 50s along
with a strong northerly gradient of nearly 6 mb. This should keep
skies mostly clear with overnight lows from the mid 40s to lower
50s most locations.

Synoptic pattern doesnt change too much through midweek so that
should give us afternoon highs generally in the 70s inland with
60s near the coast. No extreme heat, precip or cold weather under
this pattern.

Next feature we'll be tracking is a cut-off type low coming in
from the west. At the very least onshore flow will increase by
midweek into Thursday with airmass cooling aloft. This should lead
to subtle cooling by Thursday and Friday.

General model trend has been to bring the upper low onshore north
of the golden gate later Friday into Saturday. Right now precip
chances look slight meager at best. However, decided to just keep
the slight chances in the forecast as we'll likely see forecast
simulations oscillate over the next few days. Either way there
does remain a slight chance of showers late in the week. Upper low
should eject inland by next Saturday or Sunday with dry and warm
weather on the backside of that. Spring appears to be here with
dry weather, cut-off lows and no storms of note in sight.

Aviation As of 10:51 pm pdt Sunday... For 06z tafs... High
clouds will continue to steam across the region tonight with patchy
fog possible Monday morning in the vicinity of the monterey bay.

Light winds forecast through tonight with a slight seabreeze
kicking in Monday afternoon.

Vicinity of ksfo...VFR conditions will prevail through the period
with mainly high clouds. Moderate onshore flow of 10 to 15 kt
will ease becoming light overnight into Monday morning. Moderate
onshore flow will increase to around 10 to 20 kt after 21z Monday
afternoon.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals...VFR conditions with mainly high clouds
will prevail through late tonight. Ifr lifr CIGS will return
overnight into Monday morning with clearing anticipated around 19z
Monday. Light and variable winds forecast overnight into Monday
morning with moderate onshore flow in the 10 to 15 kt range
anticipated in the afternoon.

Marine As of 9:00 pm pdt Sunday... High pressure over the
eastern pacific will maintain moderate northwesterly winds across
the northern waters through late tonight. Winds will ease across
the region as the pressure gradient weakens through much of the
week. Light to moderate seas will prevail through the forecast
period.

Mtr watches warnings advisories
Tngt Sca... Pt arena to pigeon pt 10-60 nm until 3 am
public forecast: canepa rww
aviation marine: cw
visit us at

Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LNDC1 5 mi42 min N 2.9 G 4.1 57°F 1013.9 hPa
OBXC1 7 mi42 min 56°F 52°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 7 mi42 min NW 1.9 G 1.9
OKXC1 - 9414776 - Oakland (Berth 34), CA 7 mi42 min WNW 4.1 G 5.1 56°F 1014.1 hPa
AAMC1 - 9414750 - Alameda, CA 7 mi48 min WNW 1.9 G 2.9 57°F 63°F1014.1 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 9 mi42 min SSW 8 G 12 55°F 1014.2 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 10 mi42 min W 2.9 G 5.1 55°F 1013.1 hPa
PXSC1 10 mi48 min 56°F 50°F
RCMC1 - 9414863 - Richmond, CA 11 mi48 min S 4.1 G 6 56°F 56°F1013.7 hPa
FTPC1 - 9414290 - San Francisco, CA 13 mi48 min WSW 6 G 8 52°F 55°F1014.4 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 14 mi42 min NE 2.9 G 2.9 58°F 1013.5 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 14 mi42 min W 8 G 8.9
PCOC1 - 9415144 - Port Chicago, CA 17 mi42 min SSW 6 G 8
46237 - San Francisco Bar, CA (142) 22 mi60 min 54°F6 ft
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 22 mi48 min NNW 2.9 G 4.1 63°F 1012.9 hPa
RTYC1 - 9414523 - Redwood City, CA 24 mi42 min W 4.1 G 4.1 57°F 65°F1014.4 hPa
SFXC1 - San Francisco Bay Reserve, CA 26 mi105 min W 1 57°F 1013 hPa53°F
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 33 mi40 min NW 3.9 G 5.8 51°F 52°F8 ft1014.1 hPa (+0.0)
PRYC1 - 9415020 - Point Reyes, CA 41 mi42 min Calm G 1
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 49 mi40 min NW 12 G 14 54°F 54°F9 ft1014.2 hPa (+0.0)

Wind History for Oakland Middle Harbor, CA
(wind in knots)    EDIT      (on/off)   Help
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
Last
24hr
SE1
S3
SW2
SW4
NW5
N3
--
N4
W4
W4
NW6
W6
W13
W12
W9
W7
G10
SE2
E3
S4
SW7
SW4
SW4
W3
W3
1 day
ago
SW9
SW9
S6
S4
SE2
E3
S5
SW3
SW3
SW4
NW2
G5
W4
W11
W11
W8
SW6
G9
SW7
SW5
SW8
W4
SW7
SW6
SW6
NW4
2 days
ago
SE3
SE2
SE5
SE5
SW3
G6
S4
W4
W6
W6
W10
W8
SE3
SW9
G16
SW9
SW5
SW8
SW11
G17
SW10
G14
S7
S9
E4
SW6

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Oakland, Metro Oakland International Airport, CA10 mi37 minN 09.00 miPartly Cloudy55°F51°F87%1014 hPa
Concord, Buchanan Field, CA13 mi37 minN 010.00 miFair61°F51°F70%1012.1 hPa
Hayward, Hayward Air Terminal, CA14 mi36 minN 010.00 miFair57°F46°F69%1014.7 hPa
San Francisco, San Francisco International Airport, CA18 mi34 minW 810.00 miPartly Cloudy54°F46°F75%1013.8 hPa
San Carlos Airport, CA22 mi35 minN 010.00 miFair57°F46°F67%1014.2 hPa
Livermore, Livermore Municipal Airport, CA24 mi37 minN 010.00 miFair57°F51°F81%1013.5 hPa

Wind History from OAK (wind in knots)
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
Last 24hrNW8CalmNW4NE5NW4NW3W44W7W5W6NW9W8W11NW11NW7W12NW8W9NW8NW7NW4NW3Calm
1 day agoSW3S4NE4NW3CalmCalmSE3SW4W6W6W7W6W6NW10NW12W11NW10W9W10W8W8NW6CalmNW3
2 days agoCalmNE3CalmCalmCalmSE4CalmS6SW4SW6W8W14W14W15W13W9W12W11NW3W7NE3NE5SW12S3

Tide / Current Tables for Berkeley, San Francisco Bay, California
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Berkeley
Click for Map
Mon -- 01:01 AM PDT     2.65 feet Low Tide
Mon -- 02:48 AM PDT     Moonset
Mon -- 06:22 AM PDT     Sunrise
Mon -- 06:27 AM PDT     5.21 feet High Tide
Mon -- 01:23 PM PDT     Moonrise
Mon -- 01:34 PM PDT     -0.30 feet Low Tide
Mon -- 07:52 PM PDT     Sunset
Mon -- 08:45 PM PDT     5.03 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.82.62.83.44.14.75.25.14.63.72.51.30.3-0.2-0.30.212.13.24.24.954.74

Tide / Current Tables for Oakland Harbor WebStreeter Street, San Francisco Bay, California Current
   EDIT      (on/off)   Help   One Week of Data
Oakland Harbor WebStreeter Street
Click for Map
Mon -- 01:11 AM PDT     0.00 knots Slack
Mon -- 02:48 AM PDT     Moonset
Mon -- 03:59 AM PDT     0.56 knots Max Flood
Mon -- 06:22 AM PDT     Sunrise
Mon -- 06:38 AM PDT     -0.01 knots Slack
Mon -- 09:47 AM PDT     -1.16 knots Max Ebb
Mon -- 01:23 PM PDT     Moonrise
Mon -- 01:49 PM PDT     0.00 knots Slack
Mon -- 05:19 PM PDT     1.01 knots Max Flood
Mon -- 07:52 PM PDT     Sunset
Mon -- 08:28 PM PDT     -0.01 knots Slack
Mon -- 10:53 PM PDT     -0.68 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.3-0.10.20.50.60.50.2-0.2-0.7-1.1-1.2-1-0.8-0.40.10.50.9110.70.3-0.3-0.6-0.7

Weather Map and Satellite Images
       (on/off)   HelpWeather Map
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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for San Francisco/Monterey Bay Area, CA (5,6,7,8)
      (on/off)   Help

Ground Weather Radar Station Sacramento, CA
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

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.