Monday, August19, 2019 L-36.com


Marine Weather and Tides
Fremont, CA

Version 3.4
NOTICE
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 6:25AMSunset 7:56PM Monday August 19, 2019 7:32 AM PDT (14:32 UTC) Moonrise 9:24PMMoonset 9:09AM Illumination 84% 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- 306 Am Pdt Mon Aug 19 2019
Today..SW winds 10 to 15 kt. Gusts up to 20 kt this afternoon.
Tonight..SW winds 10 to 15 kt.
Tue..SW winds 10 to 20 kt with gusts up to 25 kt.
Tue night..SW winds 10 to 15 kt.
Wed..SW winds 10 to 15 kt.
Wed night..W winds 10 to 15 kt.
Thu..SW winds 10 to 15 kt.
Fri..SW winds 15 to 20 kt.
PZZ500 306 Am Pdt Mon Aug 19 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... High pressure off the california coast is weakening as a low pressure system develops off the pacific northwest resulting in decreasing winds. However, gusty winds will develop over the southern inner coastal waters later today into Tuesday. The sea state will remain dominated by shorter period northwest waves at around 8 to 10 seconds along with a light southerly swell.


7 Day Forecast for Marine Location Near Fremont, CA
   Hourly   EDIT   Help
location: 37.45, -121.96     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus66 kmtr 191150
afdmtr
area forecast discussion
national weather service san francisco bay area
450 am pdt Mon aug 19 2019

Synopsis A deep marine layer will prevail through today,
maintaining widespread morning low clouds and cooler than normal
inland temperatures. Patchy drizzle is possible through mid
morning. Warmer temperatures will develop by midweek and continue
through the upcoming weekend as high pressure rebuilds.

Discussion As of 3:50 am pdt Monday... The marine layer remains
deep early this morning with the fort ord profiler indicating a
depth of more than 3000 feet. The deep stratus cloud layer has
been producing patchy drizzle overnight. The watsonville and
salinas airports have reported trace amounts of precipitation and
a few locations in the santa cruz mountains have picked up
measurable precipitation for the third night in a row (although
amounts are mostly only 0.01"). Conditions early this morning are
much like yesterday morning with similar marine layer depth and
light to moderate onshore flow. So, expect gradual clearing of low
clouds once again today, with some areas likely to remain under
low clouds well into the afternoon hours. Also, cooler than normal
temperatures will continue for inland areas. It appears the eddy
circulation that was over our coastal waters yesterday may be
dissipating. Thus, low level southerly flow will likely end which
should mean more afternoon clearing in the north bay valleys and
santa cruz county compared to yesterday, and also slightly warmer
temps in these areas.

An upper level ridge currently centered over west texas is
forecast to expand westward and across southern california by
midweek. This will result in a compression of the marine layer
over the next few days. In addition, low level flow is forecast to
return to a more typical northwesterly direction which should diminish
inland marine air transport by midweek. The result will be
warming temperatures starting tomorrow, and especially Wednesday
and Thursday. An upper trough is forecast to move over the ridge
and into the pacific northwest on Wednesday, but is not expected
to have a material impact on our weather. By Thursday inland
valleys highs are forecast reach back into the 90s and be about
8-12 degrees warmer than today, yet not nearly as warm as last
Wednesday Thursday.

Although the upper ridge is forecast to strengthen a bit more late
in the week and into next weekend, both the GFS and ecmwf
indicate an end to the warming trend by Friday and even some
localized cooling on Friday and Saturday. This unexpected
temperature trend can likely be attributed to the development of a
surface trough offshore by Friday (something both the GFS and
ecmwf forecast). This trough will generate light southerly low
level flow along our coast from Friday on into the weekend.

Southerly flow will allow for better inland transport of marine
air and thus put an end to the warming trend, or reverse it in
locations such as the north bay valleys and santa cruz county.

Something to watch in the longer range is the potential for a
tropical system developing off the west coast of mexico and then
tracking northwest near the baja peninsula. Based on current model
output there is at least an outside chance that moisture from
this system could make it as far north as central california
during the first half of next week.

Aviation As of 4:50 am pdt Monday... Stratus in a deep marine
layer continues to advance inland. METAR observations show MVFR
cloud ceilings are fairly widespread, only far inland valleys are
holding ontoVFR. Along the immediate coastline ifr is reported
along with patchy drizzle. Pressure gradients and winds should
focus more from the west today versus on Sunday, diurnal warming
and mixing winds eroding the stratus back to the coastline VFR
by late morning and afternoon. The WRF model then shows the stratus
layer rolling back inland this evening and tonight. Ceilings tonight
similarly returning to MVFR-ifr categories exceptVFR well inland.

Vicinity of ksfo... MVFR forecast until 17z thenVFR, west winds
increasing to 15 knots with gusts to 20 to 25 knots 20z today.

MVFR ceiling returning by mid evening and for the overnight hours.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... MVFR ceilings until 18z-19z.VFR in the
afternoon then MVFR returning early to mid evening and for the
overnight hours.

Marine As of 3:06 am pdt Monday... High pressure off the
california coast is weakening as a low pressure system develops
off the pacific northwest resulting in decreasing winds. However,
gusty winds will develop over the southern inner coastal waters
later today into Tuesday. The sea state will remain dominated by
shorter period northwest waves at around 8 to 10 seconds along
with a light southerly swell.

Mtr watches warnings advisories
Tday Sca... Pt pinos to pt piedras blancas 0-10 nm from 5 pm
public forecast: dykema
aviation marine: canepa
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
RTYC1 - 9414523 - Redwood City, CA 14 mi44 min S 1.9 G 2.9 60°F 76°F1015.2 hPa
AAMC1 - 9414750 - Alameda, CA 29 mi50 min SW 5.1 G 8 59°F 70°F1015 hPa
LNDC1 29 mi44 min WSW 5.1 G 7 59°F 1014.5 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 31 mi50 min WSW 7 G 8.9
OKXC1 - 9414776 - Oakland (Berth 34), CA 32 mi44 min SW 2.9 G 7 58°F 1014.5 hPa
OBXC1 32 mi44 min 59°F 58°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 33 mi44 min W 2.9 G 8 58°F 1013.4 hPa
FTPC1 - 9414290 - San Francisco, CA 36 mi50 min SSW 4.1 G 5.1 58°F 61°F1014.7 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 38 mi56 min SW 4.1 G 7 59°F 1014.6 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 40 mi63 min N 2.9 57°F 1014 hPa
RCMC1 - 9414863 - Richmond, CA 40 mi44 min 65°F
MZXC1 - 9415102 - Martinez-Amorco CA 41 mi50 min WSW 8.9 G 13 59°F 71°F1014.1 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 41 mi50 min WNW 12 G 17 61°F 1012.9 hPa
UPBC1 42 mi44 min W 9.9 G 14
PCOC1 - 9415144 - Port Chicago, CA 42 mi44 min WSW 11 G 15 59°F 72°F1013.9 hPa
46237 - San Francisco Bar, CA (142) 43 mi62 min 60°F3 ft
ELXC1 - Elkhorn Slough Reserve, CA 45 mi107 min SSW 4.1 58°F 1013 hPa58°F
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 45 mi44 min WSW 7 G 12 60°F 1013.8 hPa
MLSC1 - Moss Landing, South Harbor, CA 46 mi23 min WSW 5.1 G 13 57°F 1015.2 hPa (+0.3)55°F
46092 - MBM1 48 mi142 min NW 9.7 58°F 61°F1014 hPa (+0.0)

Wind History for Redwood City, CA
(wind in knots)    EDIT      (on/off)   Help
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
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
Last
24hr
SE1
S1
NW1
NE2
G5
E1
G5
NW8
G11
NW7
G11
N8
G12
NW2
G6
SW9
G12
S7
G14
W10
W7
W5
NW2
SW5
S4
S6
S4
SE1
G4
SW3
SW4
W3
W3
1 day
ago
E1
S3
NE2
N4
G8
N5
G8
NE8
N7
G10
W12
W12
W11
G14
W7
G10
W9
NW5
G8
W6
W2
S6
G9
S7
G10
S2
NE1
SE4
S3
SE1
S3
E3
2 days
ago
W4
NW3
NW2
E4
N5
N7
G10
N11
G14
NW12
G15
N10
G13
N11
NW12
G16
NW11
NW10
G13
NW7
N5
NW2
NW4
NE2
N1
W5
W3
W5
W4
S1

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Mountain View, Moffett Field, CA5 mi96 minSSE 410.00 miOvercast61°F54°F78%1014.8 hPa
San Jose, San Jose International Airport, CA6 mi39 minVar 510.00 miOvercast61°F60°F97%1014.6 hPa
Palo Alto Airport, CA9 mi45 minN 010.00 miOvercast59°F53°F82%1014.6 hPa
Hayward, Hayward Air Terminal, CA17 mi38 minWSW 610.00 miOvercast61°F55°F81%1015.3 hPa
Livermore, Livermore Municipal Airport, CA19 mi39 minSSW 810.00 miOvercast59°F54°F83%1013.8 hPa
Oakland, Metro Oakland International Airport, CA22 mi39 minWSW 810.00 miOvercast62°F55°F78%1014.6 hPa
San Francisco, San Francisco International Airport, CA24 mi96 minW 610.00 miMostly Cloudy61°F54°F78%1014.2 hPa

Link to 5 minute data for KNUQ

Wind History from NUQ (wind in knots)
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
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
Last 24hr--S433SE8SE11
G19
SE12
G17
SE8SE9SE115N5N3NE6--------SE7----SE4SE4SE4
1 day ago--SE5SE9SE11SW4E7SE7E7S7N10N12N13N13N13N5NE5E7SE9SE6--SE5SE5S44
2 days agoW3Calm--Calm3E4N7NW9NW9N12NW11N11N10N11--NW5----CalmSE3--SE5S3SE4

Tide / Current Tables for Coyote Creek, Tributary #1, San Francisco Bay, California
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Coyote Creek
Click for Map
Mon -- 03:31 AM PDT     7.77 feet High Tide
Mon -- 06:27 AM PDT     Sunrise
Mon -- 10:09 AM PDT     Moonset
Mon -- 11:08 AM PDT     0.53 feet Low Tide
Mon -- 04:33 PM PDT     7.79 feet High Tide
Mon -- 07:55 PM PDT     Sunset
Mon -- 10:23 PM PDT     Moonrise
Mon -- 11:37 PM PDT     1.81 feet Low Tide
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
2.74.46.37.67.77.26.14.73.21.80.90.512.54.56.47.67.77.26.14.83.52.51.9

Tide / Current Tables for Dumbarton Point 2.3 mi NE, South San Francisco Bay, California Current
   EDIT      (on/off)   Help   One Week of Data
Dumbarton Point 2.3 mi NE
Click for Map
Mon -- 12:51 AM PDT     1.04 knots Max Flood
Mon -- 03:49 AM PDT     -0.00 knots Slack
Mon -- 06:27 AM PDT     Sunrise
Mon -- 08:17 AM PDT     -1.12 knots Max Ebb
Mon -- 10:10 AM PDT     Moonset
Mon -- 10:39 AM PDT     0.01 knots Slack
Mon -- 01:20 PM PDT     1.19 knots Max Flood
Mon -- 04:35 PM PDT     -0.01 knots Slack
Mon -- 07:55 PM PDT     Sunset
Mon -- 08:44 PM PDT     -0.94 knots Max Ebb
Mon -- 10:23 PM PDT     Moonrise
Mon -- 11:01 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
0.910.80.4-0.1-0.4-0.7-1-1.1-0.9-0.40.20.81.21.10.80.3-0.1-0.5-0.7-0.9-0.9-0.5-0

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 San Francisco Bay Area, 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.