Monday, September25, 2017 L-36.com


Marine Weather and Tides
Diablo, CA

Version 3.4
What's New / NOTES
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.
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.

Sunrise 6:58AMSunset 7:00PM Monday September 25, 2017 10:07 AM PDT (17:07 UTC) Moonrise 11:10AMMoonset 9:37PM Illumination 25% Phase: Waxing Crescent; Moon at 5 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- 832 Am Pdt Mon Sep 25 2017
Today..W winds 5 kt...becoming nw 5 to 15 kt in the afternoon.
Tonight..W winds 5 to 15 kt.
Tue..NE winds 10 kt.
Tue night..NW winds 5 kt.
Wed..NE winds 5 kt...becoming sw.
Thu..W winds 10 kt.
Fri..SW winds 10 kt.
PZZ500 832 Am Pdt Mon Sep 25 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Moderate northwesterly winds will continue over the northern outer waters as high pressure sits over the eastern pacific and a thermal trough resides over california. Winds will begin to decrease on Tuesday as the trough shifts towards the coast.

7 Day Forecast for Marine Location Near Diablo, CA
   Hourly   EDIT   Help
location: 37.87, -121.91     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus66 kmtr 251536
afdmtr
area forecast discussion
national weather service san francisco bay area
836 am pdt Mon sep 25 2017

Synopsis Warm offshore pattern will continue at least through
Wednesday with mild nights and breezy winds in the hills. Some
coastal cooling possible by Thursday with a gradual cooling trend
back to more seasonable temperatures by next weekend but with a
continued dry weather pattern.

Discussion As of 08:35 am pdt Monday... Mainly clear skies
prevail over the region again this morning as high pressure builds
over the eastern pacific. With warming conditions aloft, surface
temperatures are generally running a few degrees warmer compared
to 24 hours ago along with slightly lower relative humidity
values. This is setting the stage for the warming trend to
continue today with most areas a few to as much as 8 degrees
warmer than yesterday. With this said, the ongoing forecast for
today remains on track and no updates are needed at this time.

Please see the previous forecast discussion below for additional
details.

Prev discussion As of 3:37 am pdt Monday... Classic september
offshore weather pattern is forecast for much of the upcoming work
week. Synoptic pattern features northerly wind flow aloft with a
thermal trough at the surface over coastal california while the
center of the surface high remains well offshore. Current surface
gradients include 4 mb northerly down the coast with about 6 mb
offshore from the nevada deserts towards the coast. This is
occurring with mostly clear skies to start the day. Winds in the
hills are generally light this morning with lows from the mid 50s
to mid 60s on average, mildest where the winds are strongest.

Humidity values remain under 30 percent for many of the hill
locations so red flag warnings will continue for the north and
east bay hills through at least Wednesday.

Expect warm to locally hot weather today through Wednesday under
offshore wind regime. However, low dewpoints will keep heat
indices and impacts to a minimum along with longer early fall
nights allowing for night time cooling, even for buildings without
ac. To be clear the magnitude and overall set-up of this heat
event is not nearly as extreme as what was observed at the start
of sept.

For tonight, the models are showing another burst of gusty
northeast east winds, strongest over the napa and east bay hills.

Further drying of the airmass will persist right through Tuesday.

The combination of hot day time temps, dry offshore winds and
prolonged periods of low humidity values has prompted the red
flag warning to run through weds. No appreciable rain has fallen
and fuels remain critically dry so use extra precaution with any
ignitions sources including nigh-time warming fires.

By weds we'll lose some of the offshore adiabatic warming but no
strong onshore return is forecast so will likely squeeze another
warm to hot today, even near the coast. By Thursday the ridge will
finally weaken and allow for some cooling but temperatures to
remain on the warm side of normal through late week and likely
into the weekend as well with no rain in sight.

Aviation As of 4:30 am pdt Monday... Upper level ridge off the
california coast extends into the pacific northwest. Offshore
winds at 925 mb keeping the area clear of stratus. A shortwave
riding over the top of the ridge will bring in some cirrus clouds
from the north.

Vicinity of ksfo...VFR. West winds to 15 kt after 22z.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals...VFR.

Fire weather As of 3:37 am pdt Monday... Red flag warnings in
effect through weds afternoon for the north and east bay hills.

Temps will warm up and rh values dry out again today. Expect
stronger offshore winds in the hills tonight with continued
lowering of humidity into Tuesday. Models show another burst of
gusty northeast winds in the north and east bay hills Tuesday
night into early weds. Winds will finally ease by weds afternoon
but by then the fuels will be very dry with low humidity and
likely the hottest day of the week with widespread readings into
the upper 80s and 90s. We are near the peak of bay area fire
season and this is a classic critical fire weather pattern.

Marine As of 08:35 am pdt Monday... Moderate northwesterly winds
will continue over the northern outer waters as high pressure sits
over the eastern pacific and a thermal trough resides over
california. Winds will begin to decrease on Tuesday as the trough
shifts towards the coast.

Mtr watches warnings advisories
Tday Sca... Pt arena to pigeon pt 10-60 nm
public forecast: rgass
aviation: W pi
marine: as
fire weather: rww
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
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 12 mi49 min ESE 2.9 G 4.1 64°F 1014.1 hPa
PCOC1 - 9415144 - Port Chicago, CA 15 mi49 min S 5.1 G 7 64°F 67°F1014.4 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 16 mi49 min W 5.1 G 5.1 63°F 67°F1014.7 hPa54°F
LNDC1 20 mi49 min SSE 1.9 G 4.1 65°F 1014.5 hPa
AAMC1 - 9414750 - Alameda, CA 22 mi49 min SE 2.9 G 4.1 63°F 66°F1015 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 23 mi49 min SSE 2.9 G 4.1 64°F 1014.5 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 23 mi49 min SSE 2.9 G 4.1
OBXC1 23 mi49 min 64°F 53°F
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 23 mi49 min WNW 2.9 G 4.1 64°F 1014.2 hPa
SFXC1 - San Francisco Bay Reserve, CA 24 mi82 min S 1.9 64°F 1014 hPa54°F
PPXC1 - 9414847 - Richmond (Point Potrero), CA 24 mi49 min ESE 1 G 1.9 68°F 1014.8 hPa
PXSC1 26 mi49 min 64°F 58°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 26 mi55 min ESE 7 G 7 62°F 1013.3 hPa
RCMC1 - 9414863 - Richmond, CA 27 mi49 min S 1.9 G 2.9 63°F 64°F1014.4 hPa
FTPC1 - 9414290 - San Francisco, CA 30 mi49 min ENE 1.9 G 2.9 62°F 62°F1014.8 hPa
RTYC1 - 9414523 - Redwood City, CA 30 mi49 min E 1.9 G 2.9 65°F 67°F1014 hPa
46237 - San Francisco Bar, CA (142) 39 mi67 min 59°F3 ft

Wind History for Port Chicago, CA
(wind in knots)    EDIT      (on/off)   Help
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
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
Last
24hr
S3
E5
W6
SW3
N4
NE11
G14
NE13
NE9
G12
N3
W11
W8
G11
S5
S7
SW5
S8
S6
G10
S5
G9
S6
G11
S8
S7
S9
S6
G10
S5
G8
S6
1 day
ago
NW4
NW2
N6
G9
E2
--
NE2
N7
G10
NE15
W6
G10
W12
W7
G10
SW4
SW4
G7
SW6
S5
G9
S5
G10
S9
S8
S7
G10
S7
S7
G10
S8
S6
G11
S7
G10
2 days
ago
N4
N4
NW7
N5
N4
G7
NW4
W4
W4
W2
W13
G17
W14
W14
SW3
G10
SW7
SW3
G6
SW4
G8
SW4
S5
G8
S8
S6
S7
S9
S7
S5

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Concord, Buchanan Field, CA11 mi14 minS 310.00 miFair70°F39°F34%1013.1 hPa
Livermore, Livermore Municipal Airport, CA13 mi14 minN 010.00 miFair66°F39°F39%1014.2 hPa
Hayward, Hayward Air Terminal, CA18 mi13 minSW 310.00 miFair68°F37°F32%1015.4 hPa
Oakland, Metro Oakland International Airport, CA20 mi14 minS 410.00 miA Few Clouds65°F55°F70%1014.5 hPa

Wind History from CCR (wind in knots)
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
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
Last 24hrCalm5NE7NE6N8NE10
G16
NE6NE6NW7W6E4SE5S5S5S3SE4E3CalmS3CalmSE5SE4S6S3
1 day agoCalmN8N7N7E8N11NE96W10W7SE4S5SE3CalmE3S4SE5CalmS4S33SW3S4SW3
2 days agoS343NE5NE6N6N3CalmNW6W10W6SW4SE4CalmSE3SE3S4S3S4CalmSE4S3SE4Calm

Tide / Current Tables for Pittsburg, New York Slough, Suisun Bay, California
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Pittsburg
Click for Map
Mon -- 01:42 AM PDT     0.47 feet Low Tide
Mon -- 06:58 AM PDT     Sunrise
Mon -- 07:49 AM PDT     3.09 feet High Tide
Mon -- 12:09 PM PDT     Moonrise
Mon -- 01:05 PM PDT     1.29 feet Low Tide
Mon -- 06:41 PM PDT     3.77 feet High Tide
Mon -- 06:59 PM PDT     Sunset
Mon -- 10:37 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.80.50.50.81.42.12.633.12.92.41.81.41.31.41.92.63.33.73.83.53.12.51.8

Tide / Current Tables for Antioch Pt .3 mi E, San Joaquin River, California Current
   EDIT      (on/off)   Help   One Week of Data
Antioch Pt .3 mi E
Click for Map
Mon -- 12:07 AM PDT     -1.45 knots Max Ebb
Mon -- 04:28 AM PDT     0.00 knots Slack
Mon -- 06:57 AM PDT     Sunrise
Mon -- 07:32 AM PDT     1.14 knots Max Flood
Mon -- 10:13 AM PDT     -0.00 knots Slack
Mon -- 12:09 PM PDT     Moonrise
Mon -- 12:44 PM PDT     -0.92 knots Max Ebb
Mon -- 03:52 PM PDT     0.00 knots Slack
Mon -- 06:42 PM PDT     1.45 knots Max Flood
Mon -- 06:58 PM PDT     Sunset
Mon -- 09:30 PM PDT     -0.00 knots Slack
Mon -- 10:36 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-1.5-1.4-1.2-0.8-0.30.40.91.11.10.80.2-0.5-0.8-0.9-0.8-0.40.10.81.31.410.4-0.3-1

Weather Map and Satellite Images
       (on/off)   Help
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 (13,3,4,5)
      (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.