Thursday, July19, 2018 L-36.com


Marine Weather and Tides
Rutherford, CA

Version 3.4
What's New / NOTES
5/20/2018 -- NOAA is having problems with the data feed that I use to draw the graphs. They are aware of the issue and working to resolve it. Sometimes changing the location by about a mile will give a correct graph. 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.

Sunrise 5:59AMSunset 8:31PM Wednesday July 18, 2018 11:08 PM PDT (06:08 UTC) Moonrise 11:24AMMoonset 11:33PM Illumination 37% Phase: Waxing Crescent; Moon at 6 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
PZZ531 San Francisco Bay South Of The Bay Bridge- 855 Pm Pdt Wed Jul 18 2018
Tonight..NW winds 5 to 15 kt- diminishing to up to 10 kt after midnight.
Thu..NW winds 10 to 20 kt with gusts up to 25 kt.
Thu night..NW winds 5 to 15 kt. A slight chance of showers and Thunderstorms.
Fri..NW winds 10 to 20 kt with gusts up to 25 kt. A slight chance of showers and Thunderstorms.
Fri night..NW winds 10 to 20 kt with gusts up to 25 kt. A slight chance of showers and Thunderstorms.
Sat..NW winds 10 to 20 kt with gusts up to 25 kt.
Sat night..W winds 10 to 20 kt with gusts up to 25 kt.
Sun..W winds 5 to 15 kt.
Mon..W winds 5 to 15 kt. Winds and wind waves higher in and near Thunderstorms.
PZZ500 855 Pm Pdt Wed Jul 18 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... High pressure off the pacific northwest and thermal low pressure over the california interior will keep stronger winds over the northern outer waters and light winds elsewhere. Winds along the coast will turn southerly on Friday as low pressure develops off the southern california coast. Monsoonal moisture from the se will leave a very slight chance of Thunderstorms Thursday and Friday. A southerly swell will arrive Saturday night and continue through early next week.

7 Day Forecast for Marine Location Near Rutherford, CA
   Hourly   EDIT   Help
location: 38.5, -122.39     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus66 kmtr 190538
afdmtr
area forecast discussion
national weather service san francisco bay area
1038 pm pdt Wed jul 18 2018

Synopsis Seasonably warm temperatures will persist region-wide
through the forecast period with marine air keeping conditions
cooler at the coast. Monsoon moisture will spread over the region
and provide a slight chance of high-based convection on Thursday and
Friday along with an increase in cloud cover. Drier conditions then
return by the upcoming weekend.

Discussion As of 09:21 pm pdt Wednesday... Coastal profilers at
bodega bay and fort ord continue to show a uniform marine layer
holding steady all day around 1300-1500 feet. This will likely
cause some localized mist along the immediate coast tonight.

Otherwise, simply coastal fog and low clouds. Temps across the
interior are coming down nicely with observations showing
widespread 60s. Some pockets are cooler and some warmer, but
overall a nice trend toward the overnight lows generally in the
50s. Hills and mountains will remain warmer due to the thermal
inversion. Outside of a forecast that is on track for the evening,
focus remains on the threat of convection over the bay area.

Monsoonal moisture remains on track with water vapor and infrared
satellite imagery showing the moisture plume migrating in from the
south. Doppler radars from our hanford and la offices are picking
up showers in kern and slo counties drifting north as the showers
propagate from east to west. Over the next few hours we should
begin to see some virga over southern monterey county. 00z model
runs continue to show plenty of moisture coming in above about 700
mb with mixed thoughts on instability. The NAM is showing pockets
of 1000+ j kg of CAPE while the local mtr WRF is only showing a
few hundred at best. This gives us a continued non-zero chance of
squeezing out a high based thunderstorm or two over the next few
days. While it doesn't look widespread, it does seem as though a
pop up cell or two are likely between early Thursday morning and
Friday afternoon. There is no reason to remove thunderstorms from
the forecast at this time, so we will continue to leave the slight
chance in the forecast. Beyond this week, look for another warm
up next week. More to come. Have a great night.

Prev discussion As of 01:51 pm pdt Wednesday... Temperatures are
once again very warm to hot across the interior and in the higher
elevations across the region this afternoon. This is a result of
500 mb heights of 598 dam centered over the region as high clouds
increase from the south southeast. Meanwhile, cooler conditions
persist closer to the coast with weak onshore flow and the
presence of a 1,200-1,500 foot marine layer.

While the ridge aloft will maintain seasonably warm conditions
through the forecast period, all attention turns to the increase of
monsoon moisture from the south southeast in the coming days. The
latest thinking is that moisture advection will continue in the 700-
500 mb layer and even above from late tonight into Friday. The nam
is most bullish with MUCAPE increasing as well into the 200-600
j kg range over the central coast on Thursday and then spreading
northward into Thursday night. Another surge of moisture and
instability will be possible on Friday as a vort MAX rotates around
the east side of a mid upper level low well offshore. In addition,
pwat values are forecast to exceed 1.25" over much of our region
Thursday into Friday which is 2-4 standard deviations above
climatology. While this is not a slam dunk, do feel the potential
remains for high-based convection Thursday into Thursday night with
even a sprinkle or light shower reaching the surface on Friday as
moisture depth increases aloft. Thus, have added a slight chance of
thunderstorms back into the forecast from Thursday afternoon over
the southern portions of the region shifting northward Thursday
night into Friday afternoon.

The increase mid high level cloud cover associated with the
aforementioned moisture will also help to cool temperatures inland
by a bit through late week. However, still looking for 60s to 70s at
the coast with widespread 80s to 90s inland. In addition, conditions
will feel more humid muggy Thursday into Friday. Upper level cloud
cover typically disrupts the marine layer some as well, yet do
expect low clouds to persist near the coast in the coming days.

Drier southwest flow aloft is then forecast to develop by the
upcoming weekend which should end chances for high-based
convection over the region. Higher pressure will also continue to
dominate the pattern with temperatures at or above seasonal
averages (warmest across the interior) heading into early next
week. Do expect marine air to keep conditions cooler at the coast
with night morning low clouds in the extended as well.

Aviation As of 10:30 pm pdt Wednesday... Shallow marine layer
with moderate onshore flow. Stratus spreading across the golden
gate into oak. Clouds will then circle around to the south bay
and finally into sfo after 10z. Mid and high clouds will spread
over the area from the SE tonight and Thursday with the possibility
of a thunderstorm Thursday afternoon and evening south of the sfo
bay area.

Vicinity of ksfo... MVFR ifr after 10z. Confidence is not high as
some models show a hole around sfo with CIGS on the edges.

Sfo bridge approach... Similar to sfo.

Monterey bay terminals... Ifr through 17z at sns and 18z at mry.

Marine As of 10:34 pm pdt Wednesday... High pressure off the
pacific northwest and thermal low pressure over the california
interior will keep stronger winds over the northern outer waters
and light winds elsewhere. Winds along the coast will turn
southerly on Friday as low pressure develops off the southern
california coast. Monsoonal moisture from the SE will leave a very
slight chance of thunderstorms Thursday and Friday. A southerly
swell will arrive Saturday night and continue through early next
week.

Mtr watches warnings advisories
Tngt Sca... Pt arena to pigeon pt 10-60 nm
public forecast: bfg rgass
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
SFXC1 - San Francisco Bay Reserve, CA 28 mi83 min W 12 67°F 1011 hPa55°F
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 31 mi38 min SW 15 G 19 59°F 1012.9 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 35 mi38 min WNW 12 G 14 63°F 69°F1012.7 hPa61°F
PCOC1 - 9415144 - Port Chicago, CA 36 mi38 min W 14 G 17 66°F 70°F1012.2 hPa
RCMC1 - 9414863 - Richmond, CA 40 mi38 min S 5.1 G 8 59°F 66°F1014 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 41 mi38 min NW 14 G 18 71°F 1010.9 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 41 mi38 min SSW 13 G 17 57°F 1014.4 hPa
PRYC1 - 9415020 - Point Reyes, CA 47 mi38 min ESE 2.9 G 5.1 58°F1014.2 hPa
PXSC1 48 mi38 min 58°F 58°F
FTPC1 - 9414290 - San Francisco, CA 48 mi38 min SW 4.1 G 8.9 55°F 61°F1014.9 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 48 mi38 min WSW 5.1 G 6
OBXC1 48 mi38 min 58°F 58°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 48 mi38 min W 4.1 G 7 58°F 1014.5 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 49 mi38 min W 4.1 G 8.9 57°F 1013.5 hPa
LNDC1 49 mi38 min W 6 G 7 60°F 1014.4 hPa

Wind History for Martinez-Amorco Pier, CA
(wind in knots)    EDIT      (on/off)   Help
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
10
PM
Last
24hr
NW11
G15
NW12
G15
NW15
NW18
NW17
NW18
NW18
NW18
W17
NW16
NW16
NW17
NW16
G20
NW18
G22
NW17
G22
NW16
NW17
NW16
W15
W15
W12
G15
W15
W8
NW12
1 day
ago
NW13
NW14
W14
G17
W15
G19
W14
G17
W13
G17
W15
G19
SW14
G17
W14
W10
NW15
NW17
NW19
NW21
NW18
NW19
NW15
NW14
NW15
W15
NW13
NW7
G10
NW10
W11
2 days
ago
W13
G17
W13
G16
W11
G17
W12
G17
NW14
NW17
NW16
NW16
NW15
NW15
NW15
W18
W14
W15
W15
W14
W12
W8
G11

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Petaluma Municipal Airport, CA20 mi73 minVar 66.00 miFog/Mist55°F55°F100%1013.9 hPa
Napa, Napa County Airport, CA21 mi74 minS 1110.00 miFair61°F57°F90%1012.4 hPa
Santa Rosa, Santa Rosa Sonoma County Airport, CA22 mi75 minSSE 410.00 miFair57°F53°F87%1012.4 hPa
Vacaville Nut Tree Airport, CA24 mi75 minSSE 410.00 miFair82°F57°F43%1010.1 hPa

Wind History from O69 (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 24hr6NW4534W4W4CalmNW4CalmCalmCalm3Calm6
G11
W10NW7
G12
W10
G16
W12NW8
G14
NW5
G11
NW6W9NW5
G10
1 day ago4W5NW4
G10
NW6--W6W64CalmNW33Calm55
G10
W8NW7
G12
NW7
G13
W13W8W9W9
G14
W5
G11
W85
2 days ago6W6NW5
G10
6
G11
5
G11
4W6W7W4W5W746
G11
W9W7
G12
NW7W9
G14
NW8
G13
W9
G15
W11NW8
G14
W10W105
G13

Tide / Current Tables for Napa, Napa River, Carquinez Strait, California
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Napa
Click for Map
Thu -- 12:32 AM PDT     Moonset
Thu -- 02:23 AM PDT     1.66 feet Low Tide
Thu -- 06:00 AM PDT     Sunrise
Thu -- 07:39 AM PDT     5.92 feet High Tide
Thu -- 12:53 PM PDT     First Quarter
Thu -- 01:26 PM PDT     Moonrise
Thu -- 02:09 PM PDT     0.94 feet Low Tide
Thu -- 08:29 PM PDT     Sunset
Thu -- 08:34 PM PDT     7.33 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.12.21.71.82.63.74.95.75.95.44.53.42.21.311.22.13.456.37.27.36.75.6

Tide / Current Tables for Napa, Napa River, California
   EDIT      (on/off)   Help   One Week of Data
Napa
Click for Map
Thu -- 12:32 AM PDT     Moonset
Thu -- 02:07 AM PDT     1.48 feet Low Tide
Thu -- 06:00 AM PDT     Sunrise
Thu -- 07:29 AM PDT     5.51 feet High Tide
Thu -- 12:53 PM PDT     First Quarter
Thu -- 01:26 PM PDT     Moonrise
Thu -- 01:55 PM PDT     0.84 feet Low Tide
Thu -- 08:24 PM PDT     7.22 feet High Tide
Thu -- 08:29 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.71.81.51.82.63.74.85.45.44.942.91.81.10.81.32.33.75.26.47.27.16.45.2

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.