Monday, May20, 2019 L-36.com


Marine Weather and Tides
Mountain House, 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 8:13PM Sunday May 19, 2019 11:36 PM PDT (06:36 UTC) Moonrise 8:18PMMoonset 5:42AM Illumination 99% Phase: Waning Gibbous; Moon at 16 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- 900 Pm Pdt Sun May 19 2019
Tonight..W winds 5 to 15 kt...becoming 5 to 10 kt after midnight.
Mon..W winds 10 to 20 kt with gusts up to 25 kt.
Mon night..SW winds 10 to 20 kt with gusts up to 25 kt. Rain likely.
Tue..W winds 10 to 20 kt with gusts up to 30 kt. A chance of rain.
Tue night..NW winds 10 to 20 kt with gusts up to 30 kt. A slight chance of rain.
Wed..W winds 5 to 10 kt.
Wed night..W winds 5 to 10 kt.
Thu..W winds 5 to 15 kt.
Fri..SW winds up to 10 kt.
PZZ500 900 Pm Pdt Sun May 19 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... High pressure is about 1000 miles west of Monterey. A low pressure will move into the oregon coast Monday night and Tuesday. The high will build towards the coast after the low passes. Winds will remain light west to northwest through Monday night then increase on Tuesday and Wednesday. Large swells generated by the last strorm system will create hazardous conditions particularly for smaller vessels.


7 Day Forecast for Marine Location Near Mountain House, CA
   Hourly   EDIT   Help
location: 37.83, -121.57     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus66 kmtr 200529
afdmtr
area forecast discussion
national weather service san francisco bay area
1029 pm pdt Sun may 19 2019

Synopsis Scattered showers dissipating through the evening
hours then dry weather returns late tonight and into Monday. A
cold system dropping in from the north will bring renewed shower
chances from Monday night through Tuesday evening. Drier weather
is forecast later in the week, but temperatures will remain cooler
than normal.

Discussion As of 8:35 pm pdt Sunday... Scattered showers will
slowly diminish through the evening with the loss of daytime
surface heating. The cold core upper level low responsible for
instability will reach the four corners by Monday evening.

High temperatures today were more fit for winter season weather
especially in the north bay with highs mostly topping out only in
the upper 50s. Both 850 mb and 500 mb temperatures are within a
couple degrees celsius of equaling the all time recorded minimums
for late may on all oakland upper air soundings for the period of
record 1948-2014 per spc's sounding climatology page. Any snow on
the high peaks of the central coast is noteworthy for late may,
less so for the sierra nevada crest. Essentially we're seeing an
extension of an active to very active 2018-2019 cool season northern
hemispheric long wave pattern and the outlook in the 8 to 10 day 500
mb mean height forecasts indicates a similar scenario continues.

Prev discussion As of 01:38 pm pdt Sunday... Afternoon kmux radar
imagery pretty much says it all - widely scattered showers and
thunderstorms across the bay area. The showers thunderstorms are
thanks to an unstable atmosphere associated with a cold core upper
low. Cold upper low is also keeping temperatures below normal
this afternoon. In fact, many locations are currently running
10-20 degrees below normal for late may. Snow in the sierra is not
that uncommon in may or june for that matter. Snow in may for the
central coast is definitely noteworthy. No official confirmation
yet, but observations show temps in the mid 30s (5k ft) and the pt
sur profiler puts snow levels around 4,900 feet. Precip that
passes over the higher peaks above big sur could fall as snow or
rain snow mix this afternoon.

For the rest of the day - scattered showers thunderstorms will
continue this afternoon through early tonight as the upper low
slowly drifts southeast across the state. It will be a chilly
night across the bay area with lows in the 40s to lower 50s -
upper 30s higher peaks. Given the ample low level moisture
wouldn't be surprised to see some patchy fog tomorrow morning.

A break in the action early Monday before another system will
bring precip chances back to the bay area Monday evening through
Tuesday. The tail end of a cold front will drop south across the
region bringing rain initially to the north bay Monday evening
before moving south overnight and into Tuesday. Rainfall amounts
will be much less than the Sunday system - a few hundredths to a
quarter of an inch. Scattered showers will then linger Tuesday
into early Wednesday as the associated low pressure system move
southward. Not much in the way of QPF with the low pressure
either.

For the most part drier weather late Wednesday into early Friday
as the upper low moves farther inland toward the desert
southwest. A broad upper trough does remain over the region
keeping cooler below normal weather in place. Precip chances
return again late in the week next weekend as weak disturbance
rounds the base of the retrograding trough. Simply put, low
confidence, but precip chances will linger in the extended with
below normal temperatures.

Aviation As of 10:30 pm pdt Sunday... Shower activity is winding
down in the sfo bay area while residual showers will continue in
the mry bay area through 10-12z. Plenty of low level moisture
remains so we could see some areas of MVFR CIGS early Monday
morning as well as patchy fog in the north bay valleys. An upper
level low will bring increasing clouds and west winds to the area
Monday night.

Vicinity of ksfo... In the short term CIGS remaining 4000-5000
feet. A lower level inversion layer will develop late tonight
which could bring CIGS down to 1500-2500 feet after 12z.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... Scattered showers through 10-12z.VFR MVFR
cigs with bases between 2500-4000 feet through Monday midmorning.

Marine As of 10:23 pm pdt Sunday... High pressure is about 1000
miles west of monterey. A low pressure will move into the oregon
coast Monday night and Tuesday. The high will build towards the
coast after the low passes. Winds will remain light west to
northwest through Monday night then increase on Tuesday and
Wednesday. Large swells generated by the last strorm system will
create hazardous conditions particularly for smaller vessels.

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
sca... Mry bay until 3 am
public forecast: canepa mm
aviation: W pi
marine: W pi
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 22 mi42 min W 2.9 G 2.9 54°F 1011.7 hPa
PCOC1 - 9415144 - Port Chicago, CA 29 mi42 min SW 4.1 G 5.1 54°F 62°F1012 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 33 mi42 min SSW 2.9 G 4.1 54°F 62°F1011.9 hPa54°F
UPBC1 33 mi36 min SW 4.1 G 5.1
SFXC1 - San Francisco Bay Reserve, CA 35 mi51 min ENE 1 51°F 1012 hPa48°F
LNDC1 38 mi36 min S 1 G 1.9 54°F 1011.9 hPa (+1.4)
AAMC1 - 9414750 - Alameda, CA 39 mi42 min W 1 G 2.9 54°F 61°F1012.3 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 40 mi36 min WSW 1.9 G 2.9 54°F 1012 hPa (+1.5)
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 40 mi42 min SW 1 G 1.9
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 40 mi36 min SSW 4.1 G 5.1 54°F 1011.7 hPa (+1.5)
OBXC1 41 mi36 min 54°F 53°F
RTYC1 - 9414523 - Redwood City, CA 41 mi36 min W 4.1 G 5.1 55°F 63°F1012.7 hPa (+1.4)
PPXC1 - 9414847 - Richmond (Point Potrero), CA 42 mi36 min S 4.1 G 5.1 55°F 1012.2 hPa (+1.5)
PXOC1 - 9414311 - San Francisco (Pier 1), CA 44 mi36 min NW 2.9 G 5.1 53°F 1011 hPa (+1.5)
PXSC1 44 mi36 min 55°F 51°F
RCMC1 - 9414863 - Richmond, CA 45 mi42 min S 1.9 G 2.9 55°F 59°F1011.7 hPa
FTPC1 - 9414290 - San Francisco, CA 48 mi42 min W 2.9 G 4.1 53°F 58°F1012.1 hPa

Wind History for Port Chicago, CA
(wind in knots)    EDIT      (on/off)   Help
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
Last
24hr
SW3
G8
S9
G16
S8
G11
SW3
S4
S3
S6
G9
SW9
G14
S4
G7
S6
S6
G9
S7
S4
G7
NW4
G7
NW15
SW10
G16
W9
G12
W3
G6
E5
G10
E7
E8
G11
SW6
W5
SW4
1 day
ago
SW8
SW7
S4
G8
S5
G10
S6
SW3
G6
S6
S6
G10
S10
S6
G11
SW4
G9
SW6
SW8
S7
G13
SE5
G8
E6
G10
SE5
E8
G11
E7
E5
E6
E3
S7
S6
G9
2 days
ago
SW9
G18
W9
G13
W15
G19
W14
G18
W14
W17
W12
G16
W14
W11
W12
G16
W12
G15
W12
G15
W13
G17
W16
W9
W16
W14
G17
SW9
SW7
G11

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Livermore, Livermore Municipal Airport, CA16 mi43 minN 010.00 miMostly Cloudy50°F46°F89%1011.7 hPa
Stockton, Stockton Metropolitan Airport, CA18 mi41 minE 310.00 miOvercast52°F48°F89%1012.1 hPa

Wind History from LVK (wind in knots)
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
Last 24hrCalmSW8SW8S7SW6SW8S3CalmSW10CalmS4S11SW11SW11S7S7SW6S6W8SW7S6SW4S3Calm
1 day agoS3CalmCalmCalmCalmNW3E5NE5CalmCalmW4W4W11NW7S5S4CalmNE3SE3NW5E6CalmSE3Calm
2 days agoW13W6W9W9W6SW6SW6S7SW8W7W11W10W8W8W7W8SW6W10W9W10W10W8W6S4

Tide / Current Tables for Borden Highway Bridge, Old River, San Joaquin River, California
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Borden Highway Bridge
Click for Map
Mon -- 01:48 AM PDT     0.95 feet Low Tide
Mon -- 05:52 AM PDT     Sunrise
Mon -- 07:25 AM PDT     Moonset
Mon -- 07:33 AM PDT     3.38 feet High Tide
Mon -- 03:14 PM PDT     -0.40 feet Low Tide
Mon -- 08:13 PM PDT     Sunset
Mon -- 09:39 PM PDT     2.56 feet High Tide
Mon -- 10:18 PM PDT     Moonrise
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
1.4111.21.72.433.33.432.51.710.3-0.1-0.4-0.30.20.91.62.12.52.52.3

Tide / Current Tables for Vulcan Island .5 mi E, San Joaquin River, California Current
   EDIT      (on/off)   Help   One Week of Data
Vulcan Island .5 mi E
Click for Map
Mon -- 01:58 AM PDT     0.00 knots Slack
Mon -- 04:40 AM PDT     0.72 knots Max Flood
Mon -- 05:51 AM PDT     Sunrise
Mon -- 07:24 AM PDT     Moonset
Mon -- 08:01 AM PDT     -0.00 knots Slack
Mon -- 11:47 AM PDT     -0.61 knots Max Ebb
Mon -- 03:48 PM PDT     0.01 knots Slack
Mon -- 06:51 PM PDT     0.59 knots Max Flood
Mon -- 08:13 PM PDT     Sunset
Mon -- 10:09 PM PDT     -0.00 knots Slack
Mon -- 10:18 PM PDT     Moonrise
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
-0.3-0.200.40.70.70.60.30-0.3-0.5-0.6-0.6-0.6-0.4-0.20.10.40.50.60.50.30-0.1

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 (2,6,7,8)
      (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.