Thursday, June21, 2018 L-36.com


Marine Weather and Tides
Novato, 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 5:46AMSunset 8:38PM Thursday June 21, 2018 7:24 AM PDT (14:24 UTC) Moonrise 1:35PMMoonset 1:01AM Illumination 57% 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- 240 Am Pdt Thu Jun 21 2018
Today..SW winds 10 to 20 kt.
Tonight..SW winds 10 to 20 kt.
Fri..SW winds 10 to 20 kt.
Fri night..SW winds 10 to 20 kt.
Sat..SW winds 10 to 20 kt.
Sun..SW winds 15 to 25 kt.
Mon..SW winds 5 to 15 kt. Patchy fog.
PZZ500 240 Am Pdt Thu Jun 21 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 continue to strengthen through the rest of the week and into the weekend. In response, strong and gusty northwest winds are expected to affect the majority of the coastal waters zones through this period. Winds are expected to be strongest over the northern outer most coastal waters, strengthening to near gale force, with gale force gusts, by Friday evening through Saturday morning. As a result of the strong winds, steep and hazardous seas are likely for the majority of the coastal waters through at least the first half of the weekend.

7 Day Forecast for Marine Location Near Novato, CA
   Hourly   EDIT   Help
location: 38.1, -122.59     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus66 kmtr 211146
afdmtr
area forecast discussion
national weather service san francisco bay area
446 am pdt Thu jun 21 2018

Synopsis A robust warming trend will begin over the next
several days as high pressure builds off the west coast. This will
lead to hot conditions on Saturday with moderate to locally high
heat risks across parts of the region. Additionally, winds will
turn offshore, bringing heightened fire weather concerns to parts
of the area on Saturday. Cooling will commence on Sunday along
with the redevelopment of the marine layer for early next week.

Discussion As of 3:15 am pdt Thursday... Goes-east fog product
reveals areas of stratus again impacting parts of the san
francisco bay area and central california coast this early
Thursday morning. The fort ord profiler along the monterey bay
shoreline indicates the marine layer is running around 1,000 ft
deep, similar to what it was 24 hour ago. Despite the similar
marine layer depth, the stratus coverage doesn't appear to be
quite as widespread as it was yesterday morning.

Synoptically-speaking, an upper level high is presently centered
in southwestern arizona. A quick shortwave trough is currently
pushing through the outer periphery of this high across northern
california, and will quickly exit the state within the next 6-12
hours. Some weak ridging is expected to occur behind this
shortwave during the day, which should allow for some warming
across interior locations this afternoon.

By Friday, an upper level ridge will begin to amplify off the
california coast, resulting in further warming across interior
locations. We'll likely see some locations in the interior north
bay, interior east bay, and southern reaches of monterey and san
benito counties reach the triple digits for Friday afternoon. The
warming will continue on Saturday for what should be the hottest
day as the ridge continues to strengthen offshore. The hottest
areas of the county warning area -- far northern sonoma and napa
counties, far interior east bay, and far southern monterey + san
benito counties -- may flirt with 105 degrees on Saturday. The
warm-to-hot conditions will likely creep toward the san francisco
bay shoreline as well -- 90s to low 100s seem quite probable
along the us 101 corridor from gilroy north through san jose and
continuing toward redwood city. Temperatures farther north toward
sfo and san francisco will likely be cooler with highs along the
bay shoreline in the 80s with cooler conditions along the
immediate pacific coast. These temperatures are expected to
produce moderate to locally high heat risks across much of the
interior, and will likely see heat advisory headlines launched
later today for certain zones as a result of these forecasted hot
conditions.

Another concern for late Friday night Saturday will be locally
breezy north to northeast winds over the north bay mountains.

High-resolution models are starting to capture this event, and are
showing wind speeds around 15 to 25 mph with local gusts around
35 mph across far northern napa and sonoma counties. Combined with
poor relative humidity recoveries, this will likely lead to
heightened fire weather concerns.

For Sunday, models have consistently been advertising appreciable
cooling across the region as the ridge axis pushes east into the
north american continent. Additionally, the gfs, nam, and local
in-house WRF model have suggested the potential for a southerly
surge pushing north along the monterey county coast and continuing
toward the golden gate during the day. Cooling will continue into
the first half of next week with highs gradually returning close
to late june climatological normals.

Aviation As of 4:46 am pdt Thursday... For 12z tafs. Marine
layer currently sits slightly below 1,000 feet, per the ft. Ord
profiler. Goes-16 fog product shows patchy stratus affecting the
greater sf bay terminals (bkn ovc deck around 1,200 feet), as well
as monterey bay terminals (bkn ovc deck around 500 feet). The
shallow stratus should erode by 16-17z for most terminals this
morning. Building ridge of high pressure will compress the marine
layer even more by this evening. Therefore, not expecting CIGS to
form tonight. However, there could be some patchy dense fog that
may reduce vsby around the monterey bay region overnight tonight,
low confidence on exact timing. Light to moderate west northwest
winds this afternoon, locally gusty at times.

Moderate-high forecast confidence.

Vicinity of ksfo... MVFR CIGS becomingVFR by 16-17z. Onshore winds
15-20 kt, with higher gusts possible by this afternoon. A very
compressed marine layer should keep CIGS from forming tonight.

Sfo bridge approach... Approach remains clear for now (per smb ob),
but intermittent MVFR CIGS possible before 16z.

Monterey bay terminals... Lifr ifr CIGS through about 16-17z, then
vfr. Light to moderate west northwest winds this afternoon, around
10-12 kt. Compressed marine layer may produce fog tonight,
reducing horizontal and vertical vsby by Friday morning.

Fire weather As of 3:15 am pdt Wednesday... A pronounced
warming and drying trend is forecast for the end of the week as
high pressure builds in and winds turn offshore. Saturday
presently looks to be the hottest day, with poor overnight
relative humidity recoveries for both Friday night and Saturday
night. Locally gusty north to northeast winds are possible in the
north bay hills Friday night and Saturday morning. A return to
cooling and redevelopment of the marine layer appears in store for
Sunday into the first part of next week as flow shifts back
onshore.

Marine As of 2:40 am pdt Thursday... High pressure over the
eastern pacific will continue to strengthen through the rest of
the week and into the weekend. In response, strong and gusty
northwest winds are expected to affect the majority of the coastal
waters zones through this period. Winds are expected to be
strongest over the northern outer most coastal waters,
strengthening to near gale force, with gale force gusts, by Friday
evening through Saturday morning. As a result of the strong
winds, steep and hazardous seas are likely for the majority of the
coastal waters through at least the first half of the weekend.

Mtr watches warnings advisories
Tday Sca... Pigeon pt to pt pinos 0-10 nm
sca... Pt arena to pt reyes 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... Pt reyes to pigeon pt 0-10 nm
sca... Mry bay from 12 pm
public forecast: rowe
aviation: bam
marine: bam
fire weather: rowe
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
TIBC1 - Tiburon Pier, San Francisco Bay, CA 16 mi62 min WSW 1 51°F 1016 hPa
RCMC1 - 9414863 - Richmond, CA 16 mi61 min SSE 7 G 9.9 54°F 60°F1016.1 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 18 mi55 min WSW 8 G 13 56°F 1015.4 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 18 mi55 min SSE 9.9 G 13 55°F 1016.6 hPa
FTPC1 - 9414290 - San Francisco, CA 21 mi61 min WSW 1.9 G 5.1 52°F 58°F1016.5 hPa
46237 - San Francisco Bar, CA (142) 22 mi55 min 52°F5 ft
PRYC1 - 9415020 - Point Reyes, CA 22 mi55 min NW 22 G 27 53°F1016.1 hPa
PXSC1 23 mi55 min 54°F 52°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 23 mi55 min SSE 1.9 G 6 52°F 1015.4 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 24 mi55 min SW 5.1 G 8 53°F 1016.6 hPa
OBXC1 24 mi55 min 53°F 52°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 25 mi55 min SW 7 G 9.9
MZXC1 - 9415102 - Martinez-Amorco CA 25 mi55 min WSW 4.1 G 7 57°F 66°F1015.7 hPa53°F
AAMC1 - 9414750 - Alameda, CA 27 mi61 min WSW 2.9 G 6 54°F 66°F1016.7 hPa
LNDC1 27 mi55 min SSE 5.1 G 7 54°F 1016.5 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 27 mi45 min NW 19 G 25 53°F 52°F1017.1 hPa53°F
PCOC1 - 9415144 - Port Chicago, CA 29 mi55 min SW 6 G 9.9 53°F 67°F1015.3 hPa
SFXC1 - San Francisco Bay Reserve, CA 31 mi100 min WNW 8 53°F 1014 hPa51°F
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 37 mi55 min WNW 12 G 15 58°F 1014.4 hPa
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 39 mi45 min NW 21 G 29 52°F 50°F1016.1 hPa52°F
RTYC1 - 9414523 - Redwood City, CA 46 mi55 min W 8.9 G 9.9 54°F 69°F1017.4 hPa
46214 - Point Reyes, CA (029) 48 mi55 min 54°F8 ft

Wind History for Richmond, CA
(wind in knots)    EDIT      (on/off)   Help
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
3
AM
4
AM
5
AM
6
AM
7
AM
Last
24hr
S5
S2
SE3
G6
S7
SE6
G9
S6
S5
G8
S6
G10
S5
G11
S5
G8
NW4
G7
NW7
G10
NW9
NW4
E2
SE3
G6
SE5
G8
SE7
G12
S10
SE7
G10
S7
G12
SE6
G10
SE5
G10
SE5
G11
1 day
ago
S3
S4
G9
S8
SE7
G10
S8
G11
SE3
G7
S7
S7
G12
SE7
G10
S5
G8
SE3
S4
G7
W4
G8
W2
G5
W4
W4
W2
SE3
S4
W2
G6
W2
NW7
N4
S7
G10
2 days
ago
SW2
G5
SW3
W2
G7
S5
S6
G11
S5
G8
S4
G9
S6
G11
S5
NW2
SW3
G10
W3
SE3
W4
G9
W4
SE2
W3
S3
SW4
G8
SW3
S5
S3
S3
G7
S4

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Novato / Gnoss Field, CA4 mi50 minN 010.00 miFair48°F46°F94%1016.3 hPa
Petaluma Municipal Airport, CA11 mi50 minN 010.00 miFair46°F46°F100%1016.3 hPa
Napa, Napa County Airport, CA18 mi31 minN 010.00 miFair50°F48°F93%1015.2 hPa

Wind History from DVO (wind in knots)
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
3
AM
4
AM
5
AM
6
AM
7
AM
Last 24hrCalm3SW7
G13
SW8SW10SW13W10
G15
SW7
G17
SW11
G17
4
G13
56
G18
4
G11
44CalmNE4CalmCalmCalmCalmCalmCalmCalm
1 day agoCalmCalmS4Calm54S965
G14
3N13N9
G15
5
G12
N8CalmN6
G11
CalmCalmCalmCalmCalmCalmE4Calm
2 days agoSW4CalmNW4CalmN6NE4
G11
N106
G15
NW10
G17
W7
G14
N13
G19
N13N11N6N7
G13
N5N4--Calm--CalmNW4CalmCalm

Tide / Current Tables for Hog Island, San Antonio Creek, San Pablo Bay, California
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Hog Island
Click for Map
Thu -- 02:00 AM PDT     Moonset
Thu -- 03:49 AM PDT     1.19 feet Low Tide
Thu -- 05:47 AM PDT     Sunrise
Thu -- 08:47 AM PDT     4.50 feet High Tide
Thu -- 02:34 PM PDT     Moonrise
Thu -- 03:25 PM PDT     0.62 feet Low Tide
Thu -- 08:36 PM PDT     Sunset
Thu -- 09:40 PM PDT     6.33 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.92.81.91.31.21.62.53.54.34.54.23.62.71.810.70.71.42.645.36.16.35.9

Tide / Current Tables for Petaluma River Approach, San Pablo Bay, California Current
   EDIT      (on/off)   Help   One Week of Data
Petaluma River Approach
Click for Map
Thu -- 12:03 AM PDT     -0.69 knots Max Ebb
Thu -- 01:59 AM PDT     Moonset
Thu -- 03:09 AM PDT     0.00 knots Slack
Thu -- 05:36 AM PDT     0.46 knots Max Flood
Thu -- 05:47 AM PDT     Sunrise
Thu -- 08:31 AM PDT     -0.00 knots Slack
Thu -- 11:43 AM PDT     -0.69 knots Max Ebb
Thu -- 02:33 PM PDT     Moonrise
Thu -- 02:55 PM PDT     0.00 knots Slack
Thu -- 06:05 PM PDT     0.74 knots Max Flood
Thu -- 08:35 PM PDT     Sunset
Thu -- 09:44 PM PDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.7-0.6-0.4-00.30.40.50.40.1-0.2-0.5-0.7-0.7-0.6-0.300.40.70.70.70.50.2-0.1-0.4

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 (10,2,3,4)
      (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.