Thursday, May23, 2019 L-36.com


Marine Weather and Tides
Walnut Creek, CA

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 5:51AMSunset 8:18PM Wednesday May 22, 2019 9:39 PM PDT (04:39 UTC) Moonrise 11:05PMMoonset 8:06AM Illumination 83% Phase: Waning Gibbous; Moon at 19 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 The San Francisco Bay North Of The Bay Bridge- 833 Pm Pdt Wed May 22 2019
Tonight..SW winds 5 to 15 kt.
Thu..SW winds 10 to 20 kt with gusts up to 25 kt.
Thu night..SW winds 15 to 25 kt with gusts up to 30 kt.
Fri..SW winds 10 to 20 kt with gusts up to 25 kt.
Fri night..SW winds 5 to 15 kt.
Sat..SW winds 10 to 20 kt with gusts up to 25 kt.
Sat night..SW winds 5 to 15 kt.
Sun..SW winds 5 to 15 kt.
Memorial day..W winds 5 to 15 kt.
PZZ500 833 Pm Pdt Wed May 22 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Low pressure over the southern california interior will move into the great basin on Thursday. Strong northwest winds on the back side of the low including gale force winds over the northern waters will decrease Thursday night. A large northwest swell will persist through the end of the week particularly over the northern and outer waters.


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


Area Discussion for - San Francisco/Monterey Bay Area, CA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus66 kmtr 230016
afdmtr
area forecast discussion
national weather service san francisco bay area
516 pm pdt Wed may 22 2019

Synopsis Temperatures will be on the warming trend through the
remainder of the week, yet will remain below seasonal averages.

Unseasonably cool and unsettled conditions continue into the
upcoming weekend with a renewed chance of rain showers as another
system drops southward across the region.

Discussion As of 01:45 pm pdt Wednesday... Radar has been
switched back to clear air mode for the time being as shower
activity has exited to socal. Satellite imagery shows mostly sunny
skies across the bay area with widespread cumulus clouds from the
south bay southward. Increased sunshine, warmer airmass and lack
of precip has led to warmer temperatures this afternoon with many
locales running 5 to 10 degrees above Tuesday's maximum temps.

Once the Sun sets expect the cumulus to diminish with mainly clear
skies in the heart of the bay area with more clouds likely around
monterey bay. If the higher res models verify overnight, breezy to
gusty NE are forecast over the north and east bay higher terrain.

Gusts over 30 mph are possible.

The longwave pattern keeps a broad upper trough over the region
surprisingly into early next week. Temperatures will warm a few
more degrees on Thursday returning closer to normal. Highs will be
in the 60s to mid 70s. Several models rotate a weak shortwave
around the base of the upper trough Thursday afternoon. There will
likely be enough lift to support a few pop up showers or an
isolated thunderstorm over gabilan range during peak heating.

As noted on the previous discussion additional disturbances
rotate around the trough as well bringing additional precip
chances to the state. A few showers may drift westward in the
forecast area on Friday and early Saturday. Another upper low
takes aim at the bay area again late in the weekend providing a
better chance for precip late Saturday and more so on Sunday. It
doesn't look like a total wash out at this point for the holiday
weekend, but more showery in nature.

Memorial day looks cool with a few isolated showers. Warmer and
drier will develop Tuesday and Wednesday.

Aviation As of 5:13 pm pdt Wednesday... Mid level moisture
wrapping around an upper low over the southwest is causing
afternoon cumulus clouds to form. The clouds are scattered but
there could be small patches where it is bkn. These clouds should
dissipate after dark.

Strong onshore flow on the back side of the upper low will allow
stratus or stratocumulus to form late tonight. Could see sct-bkn
conditions at times over the bay area between 06z and 16z. West
winds gusting to 20 kt through 04z.

Vicinity of ksfo...VFR through the airport evening rush. MVFR
cigs possible over the approach between 12z-16z. West winds
gusting to 20 kt through 04z.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... Strong onshore flow will allow for early
MVFR cigs. MVFR CIGS after 02z at mry and 04z at sns.

Marine As of 04:39 pm pdt Wednesday... A large, moderate period,
late season northwest swell is moving across the waters today.

Breakers of up to around 20 feet are possible. In addition,
increasing northwest winds with gale force gusts are forecast
across the northern and outer waters through the near term.

Moderate wind and seas will persist through the end of the week,
particularly in the northern outer waters. Hazardous conditions
from squared seas will exist after the winds begin to diminish.

Mtr watches warnings advisories
Tngt High surf advisory... Caz006-505-509-529-530
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
glw... Pt arena to pigeon pt 10-60 nm
sca... Pigeon pt to pt piedras blancas 10-60 nm until 2 pm
glw... Pigeon pt to pt piedras blancas 10-60 nm until 3 am
glw... Pt arena to pt reyes 0-10 nm until 3 am
sca... Rough bar advisory for sf bar
sca... Mry bay
public forecast: mm
aviation: drp
marine: drp
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
UPBC1 10 mi39 min WNW 14 G 17
MZXC1 - 9415102 - Martinez-Amorco CA 10 mi45 min W 11 G 12 66°F 62°F1008 hPa55°F
PCOC1 - 9415144 - Port Chicago, CA 11 mi39 min SW 8 G 9.9 65°F 63°F1008.1 hPa (-0.0)
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 13 mi45 min W 6 G 8.9 69°F 1007.7 hPa
LNDC1 14 mi39 min S 5.1 G 6 61°F 1008.9 hPa (+0.4)
OKXC1 - 9414776 - Oakland (Berth 34), CA 16 mi39 min SSW 2.9 G 4.1 62°F 1008.9 hPa (+0.4)
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 16 mi45 min SW 6 G 8
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 16 mi39 min W 6 G 7 66°F 1008.2 hPa (+0.4)
AAMC1 - 9414750 - Alameda, CA 16 mi45 min SW 6 G 6 60°F 62°F1009.4 hPa
OBXC1 17 mi39 min 61°F 57°F
PPXC1 - 9414847 - Richmond (Point Potrero), CA 17 mi39 min S 11 G 12 60°F 1009.1 hPa (+0.4)
PXOC1 - 9414311 - San Francisco (Pier 1), CA 19 mi39 min SSE 2.9 G 5.1 61°F 1007.9 hPa (+0.3)
RCMC1 - 9414863 - Richmond, CA 19 mi39 min 61°F
PXSC1 20 mi39 min 62°F 54°F
SFXC1 - San Francisco Bay Reserve, CA 21 mi114 min W 7 70°F 1007 hPa51°F
FTPC1 - 9414290 - San Francisco, CA 23 mi45 min WSW 11 G 17 57°F 59°F1008.8 hPa
RTYC1 - 9414523 - Redwood City, CA 28 mi39 min WNW 9.9 G 12 61°F 64°F1009.6 hPa (+0.0)
46237 - San Francisco Bar, CA (142) 32 mi69 min 57°F10 ft
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 43 mi29 min NW 19 G 25 56°F 57°F1010.1 hPa

Wind History for Union Pacific Rail Road Bridge (UPRR), CA
(wind in knots)    EDIT      (on/off)   Help
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
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
Last
24hr
NW17
G22
W20
G25
W18
G26
W19
NW10
G17
NW12
G15
NW11
G15
NW10
G14
NW9
G13
NW8
NW4
NW7
NW9
W10
W7
G10
W8
W14
G18
W12
G15
NW10
G13
W15
G20
W13
G18
W12
W13
W14
G17
1 day
ago
W11
G17
SW6
G13
SW15
G20
SW8
G11
W15
G19
W11
G16
NW15
G19
W13
W13
W17
W21
G26
W17
NW12
G21
W19
G24
W24
G31
W22
G30
W25
W22
G27
W21
W26
W19
G26
W22
G27
W24
G30
2 days
ago
--
W4
NW5
W5
G8
W6
NW5
NW9
W9
G13
NW11
G17
W10
G13
W10
G17
SW18
G23
SW12
G20
SW13
G21
W17
G21
W14
G21
SW13
G18

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Concord, Buchanan Field, CA6 mi46 minS 510.00 miFair69°F50°F51%1006.9 hPa
Oakland, Metro Oakland International Airport, CA16 mi46 minW 910.00 miMostly Cloudy61°F53°F75%1009.3 hPa
Hayward, Hayward Air Terminal, CA17 mi45 minWSW 66.00 miFair with Haze60°F53°F78%1010.1 hPa
Livermore, Livermore Municipal Airport, CA18 mi46 minNW 67.00 miFair61°F52°F72%1008.5 hPa

Wind History from CCR (wind in knots)
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
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
Last 24hrW8W7
G15
SW8
G17
W5S3SW4W6W4W4CalmN5NW6NW4NW743N8NW10
G14
N8W6SW10W7SW7S5
1 day agoSW8S5SW12
G16
S11SW9SW5SW4W13W12W14W14W16W12
G19
W12
G27
W14
G20
W20
G28
W17
G27
W23
G32
W22
G31
W15
G25
W20
G26
W17
G24
W15W10
2 days agoW5CalmCalmCalmCalmCalmCalmCalmSE3CalmS3S4S3CalmW5W9W9
G14
SW8SW15
G20
W16
G20
SW15SW14SW10--

Tide / Current Tables for Suisun Point, Carquinez Strait, California
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Suisun Point
Click for Map
Thu -- 12:05 AM PDT     Moonrise
Thu -- 04:17 AM PDT     4.95 feet High Tide
Thu -- 05:52 AM PDT     Sunrise
Thu -- 10:01 AM PDT     Moonset
Thu -- 12:22 PM PDT     -0.34 feet Low Tide
Thu -- 07:19 PM PDT     4.20 feet High Tide
Thu -- 08:18 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12
am
1
am
2
am
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
2.533.84.64.94.84.43.52.51.50.60-0.3-0.20.31.22.23.13.84.24.13.632.6

Tide / Current Tables for Roe Island S, Suisun Bay, California Current
   EDIT      (on/off)   Help   One Week of Data
Roe Island S
Click for Map
Thu -- 12:05 AM PDT     Moonrise
Thu -- 01:29 AM PDT     0.00 knots Slack
Thu -- 03:54 AM PDT     0.76 knots Max Flood
Thu -- 05:51 AM PDT     Sunrise
Thu -- 06:45 AM PDT     -0.00 knots Slack
Thu -- 10:00 AM PDT     Moonset
Thu -- 10:25 AM PDT     -2.28 knots Max Ebb
Thu -- 03:11 PM PDT     0.00 knots Slack
Thu -- 06:30 PM PDT     0.78 knots Max Flood
Thu -- 08:18 PM PDT     Sunset
Thu -- 09:39 PM PDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12
am
1
am
2
am
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
-0.7-0.30.20.60.80.60.3-0.2-1.1-1.9-2.3-2.2-2-1.6-1-0.20.40.60.80.80.60.2-0.2-0.7

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 (0,6,7,8)
      (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.