Wednesday, August21, 2019 L-36.com


Marine Weather and Tides
Brisbane, 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 6:29AMSunset 7:56PM Wednesday August 21, 2019 2:03 PM PDT (21:03 UTC) Moonrise 10:22PMMoonset 11:05AM Illumination 63% Phase: Waning Gibbous; Moon at 21 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- 839 Am Pdt Wed Aug 21 2019
.small craft advisory in effect from noon pdt today through this evening...
Today..S winds 5 to 10 kt, becoming sw 10 to 20 kt with gusts up to 30 kt this afternoon.
Tonight..SW winds 10 to 15 kt with gusts up to 25 kt.
Thu..SW winds 10 to 15 kt.
Thu night..SW winds 15 to 20 kt with gusts up to 25 kt.
Fri..SW winds 15 to 20 kt with gusts up to 25 kt.
Fri night..SW winds 10 to 15 kt.
Sat..SW winds 15 to 20 kt.
Sun..SW winds 15 to 20 kt.
PZZ500 839 Am Pdt Wed Aug 21 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Light to moderate northwest winds will persist across the coastal waters through mid-week as high pressure sits over the eastern pacific and low pressure develops over central california. Locally gusty coastal jets are forecast south of point arena, pigeon point, and point sur that will create hazardous seas conditions for smaller vessels. Breezy afternoon and evening winds are also forecast over the san francisco bay as well as over the Monterey bay. Mixed seas will continue with shorter period northwest waves at around 8 to 10 seconds, a light longer period west swell, and a light southerly swell.


7 Day Forecast for Marine Location Near Brisbane, CA
   Hourly   EDIT   Help
location: 37.67, -122.38     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus66 kmtr 211737
afdmtr
area forecast discussion
national weather service san francisco bay area
1037 am pdt Wed aug 21 2019

Synopsis High pressure over central and southern california
will kick off a warming trend through Thursday and will compress
the marine layer along the coast leading to significantly less
night and morning low clouds. Seasonable temperatures are forecast
through the upcoming weekend, along with continued dry conditions.

Discussion As of 09:10 am pdt Wednesday... The marine layer
struggled overnight and into this morning -- bringing clear to
mostly sunny conditions to most regions. A combination of being
partially mixed by a trough to the north and compressed by a
retrograding ridge aloft and to the south has kept marine stratus
mostly in check this morning. Satellite imagery shows mostly clear
skies across the sf bay area while the remnants of the compressed
marine layer otter eddy are bringing some low clouds to the
salinas valley and lip of the monterey bay.

For today and the coming days, a modest warming trend is forecast in
response to a retrograding ridge. Seasonal temperatures are expected
near the coast while inland areas could rise to 3 to 8 degrees above
normal. Coastal highs in the upper 60s to mid 70s are expected,
while areas in proximity to shorelines will rise to the upper 70s to
mid 80s. Extreme inland areas, such as the north east bay valleys,
southern santa clara valley, and inland monterey san benito counties
are forecast to hit the upper 80s to mid 90s. Some passing high
clouds are expected through the day, increasing the farther
northward you are and through the course of the day, as a
consequence of the low pressure trough digging southward later today
and into tonight. These high clouds could suppress temperatures in
the north bay by a few degrees which they will make up tomorrow.

Tomorrow will be similar to day but with less overall trough
influence -- fewer clouds, a compressed marine layer, and slightly
warmer temperatures inland, particularly for the extreme north
bay that will be under some cloud cover today.

No significant change is planned for the overnight forecast
package. Please see previous discussion for more detail on the
current forecast. Main forecast challenge of the day will be what
impacts, if any, we may see as the moist, unstable remnants of a
tropical depression potentially move over the area mid week next
week.

Previous discussion As of 3:53 am pdt Wednesday... An
interesting weather pattern is currently in place over the west
coast with california nuzzled between a ridge of high pressure to
the east and a ridge of high pressure to the west while a trough
of low pressure passes through the region. High pressure at the
surface presently centered over the four-corners region compressed
the marine layer along the coast resulted in little to no marine
layer overnight. Currently only a few patches of stratus are
visible by satellite over the coastal waters and locally inland
over coastal hills and peaks. Gradients have seen little change
overnight with the northerly gradients remaining around 3 mb while
the onshore gradient from sfo to wmc weakened slightly to around
2 mb.

Model guidance continues to depict a warming trend through
Thursday before temperatures plateau maintaining seasonably warm
temperatures across the region through the remainder of the week and
through the weekend. 850 mb temperatures will warm to around 22 c by
this afternoon then cool on Thursday in response to the trough
aloft. However strong ridging at the surface appears to counteract
any cooling resulting in relatively little change through the rest
of the forecast period. Mostly clear skies will also aid this
warming trend to get off to an earlier start today and Thursday.

Prev discussion As of 9:53 pm pdt Tuesday... The boundary layer
winds will turn more northerly on weds which will induce some
adiabatic warming. Model guidance suggests many of the north and
east bay valleys will warm into the upper 80s and lower 90s on
weds which will be as much as 10 degrees warmer than what was
observed on Tuesday.

One item to watch on weds night is some potentially gusty
northerly winds in the hills. 00z NAM has 20-30 kt winds at 925 mb
(around 2500 feet) from sonoma to monterey late weds afternoon
into weds night. Not expecting any wind advisories but could be a
brief fire weather concern.

Pattern looks to continue with above normal warming trend for
inland areas Thursday and Friday as the ridge builds over the
region with potential for the thermal trough to straddle the coast
at times keeping marine stratus to a minimum. Long range trends
remain warm and dry. Will be watching the tropical activity as it
heads north from baja next week. Current ECMWF would bring
remnants of our coast by about next Thursday... A long ways off.

Aviation As of 10:37 am pdt Wednesday... For 18z tafs...

vfr expected today. Patchy low clouds persist over the monterey
bay. Northwest winds this evening will strengthen around 2000
feet agl creating some potential for low level wind shear but
magnitude too low to include in tafs at this time. These winds are
also likely to keep stratus development tonight reduced.

Vicinity of ksfo...VFR. West winds increasing after 21z to around
20kt with gusts near 30kt expected.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals...VFR today. Onshore winds 10-15 kt this
afternoon. Patchy ifr MVFR CIGS returning overnight tonight.

Marine As of 8:39 am pdt Wednesday... Light to moderate
northwest winds will persist across the coastal waters through
mid-week as high pressure sits over the eastern pacific and low
pressure develops over central california. Locally gusty coastal
jets are forecast south of point arena, pigeon point, and point
sur that will create hazardous seas conditions for smaller
vessels. Breezy afternoon and evening winds are also forecast over
the san francisco bay as well as over the monterey bay. Mixed
seas will continue with shorter period northwest waves at around 8
to 10 seconds, a light longer period west swell, and a light
southerly swell.

Mtr watches warnings advisories
Tday Sca... Sf bay from 12 pm
sca... Mry bay from 12 pm
sca... Pigeon pt to pt pinos 0-10 nm from 12 pm
sca... Pt pinos to pt piedras blancas 0-10 nm
sca... Pt arena to pt reyes 0-10 nm
sca... Pt reyes to pigeon pt 0-10 nm from 12 pm
public forecast: drp
aviation: sims
marine: sims
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
AAMC1 - 9414750 - Alameda, CA 8 mi52 min SSW 1 G 1.9 70°F 69°F1014.8 hPa
PXSC1 9 mi52 min 73°F 57°F
OBXC1 9 mi46 min 68°F 60°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 9 mi52 min WNW 5.1 G 7
PXOC1 - 9414311 - San Francisco (Pier 1), CA 9 mi46 min WSW 4.1 G 8.9 74°F 1013.3 hPa
FTPC1 - 9414290 - San Francisco, CA 10 mi52 min W 7 G 14 67°F 65°F1014.7 hPa
LNDC1 10 mi46 min WSW 5.1 G 6 73°F 1014.2 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 10 mi46 min NW 7 G 8 67°F 1014.3 hPa
RTYC1 - 9414523 - Redwood City, CA 14 mi46 min NNW 7 G 11 73°F 74°F1014.7 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 16 mi107 min SSE 9.9 67°F 1014 hPa
46237 - San Francisco Bar, CA (142) 16 mi64 min 65°F3 ft
PPXC1 - 9414847 - Richmond (Point Potrero), CA 16 mi46 min SSW 9.9 G 15 66°F 1014.5 hPa
RCMC1 - 9414863 - Richmond, CA 18 mi52 min SSE 6 G 8.9 69°F 66°F1014 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 25 mi34 min NW 7.8 G 9.7 60°F 58°F1015.6 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 27 mi52 min WSW 7 G 8 74°F 1013.5 hPa
UPBC1 29 mi46 min WNW 15 G 18
MZXC1 - 9415102 - Martinez-Amorco CA 29 mi52 min WNW 14 G 16 78°F 73°F1013.4 hPa
PCOC1 - 9415144 - Port Chicago, CA 32 mi46 min W 14 G 17 78°F 72°F1013.3 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 37 mi52 min NW 11 G 15 79°F 1012.7 hPa
PRYC1 - 9415020 - Point Reyes, CA 39 mi46 min 59°F1014.9 hPa
SFXC1 - San Francisco Bay Reserve, CA 41 mi79 min W 8.9 83°F 1013 hPa61°F

Wind History for Alameda, CA
(wind in knots)    EDIT      (on/off)   Help
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
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
Last
24hr
W9
W10
G14
W8
G11
W11
G15
W11
G15
W8
G13
W11
G15
W8
G11
W7
G11
SW4
W2
SW8
G11
SW9
SW7
G10
SW9
SW8
SW8
G11
E2
SW2
SE3
SE5
SE4
S2
SW2
1 day
ago
W7
W10
G13
W11
W10
W9
W8
G12
W7
G10
W5
G9
W5
SW6
W6
G9
W11
W9
G12
W7
G11
W8
G14
W7
W6
G12
W8
G12
W6
G10
W7
W4
W7
G10
W6
W8
G11
2 days
ago
S9
S4
SW3
W11
W13
G17
W12
G17
W11
G17
W9
G12
W9
G12
W6
G9
W9
W7
G10
W7
G10
SW8
SW8
W7
G12
W8
W5
SW4
G8
SW5
G8
SW4
SW6
SW7
SW5

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Francisco, San Francisco International Airport, CA4 mi68 minWNW 1510.00 miA Few Clouds79°F54°F42%1014.1 hPa
Oakland, Metro Oakland International Airport, CA9 mi71 minW 610.00 miA Few Clouds75°F55°F52%1014.4 hPa
San Carlos Airport, CA12 mi77 minNW 610.00 miClear77°F59°F54%1014.9 hPa
Half Moon Bay Airport, CA13 mi64 minNW 1110.00 miFair66°F57°F73%1015.6 hPa
Hayward, Hayward Air Terminal, CA14 mi70 minW 810.00 miFair77°F55°F48%1015.1 hPa
Palo Alto Airport, CA19 mi77 minN 1010.00 miPartly Cloudy73°F62°F69%1014.6 hPa
Mountain View, Moffett Field, CA24 mi68 minN 910.00 miFair80°F60°F51%1014.4 hPa

Link to 5 minute data for KSFO

Wind History from SFO (wind in knots)
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
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
Last 24hrW12
G22
W19
G24
W19
G26
W21
G26
W20
G24
W17
G24
W16W12W12W11W9W7NW6W10W9W7W5W8W3E4E3NW9NW11NW15
1 day agoSW10W18W16W16
G21
W14
G19
W10W13W10W9
G17
W8W11W13W11W10W9W7W11W11W8W10W10W14W16
G21
W13
2 days agoS12S15SW16SW19
G24
SW9
G18
S4SW6S7S7S8SW6S7S6SW4SW7W7W6W6W5SW5SW8SW9SW12W9

Tide / Current Tables for Oyster Point Marina, San Francisco Bay, California (3)
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Oyster Point Marina
Click for Map
Wed -- 04:28 AM PDT     5.38 feet High Tide
Wed -- 06:30 AM PDT     Sunrise
Wed -- 10:34 AM PDT     1.72 feet Low Tide
Wed -- 12:05 PM PDT     Moonset
Wed -- 05:00 PM PDT     6.57 feet High Tide
Wed -- 07:54 PM PDT     Sunset
Wed -- 11:21 PM PDT     Moonrise
Wed -- 11:38 PM PDT     1.74 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
2.43.24.14.85.35.34.94.13.12.31.81.82.33.24.35.46.26.66.35.54.43.32.41.8

Tide / Current Tables for Sierra Point 1.3 mi ENE, South San Francisco Bay, California Current
   EDIT      (on/off)   Help   One Week of Data
Sierra Point 1.3 mi ENE
Click for Map
Wed -- 01:54 AM PDT     0.67 knots Max Flood
Wed -- 05:00 AM PDT     -0.00 knots Slack
Wed -- 06:30 AM PDT     Sunrise
Wed -- 08:08 AM PDT     -0.83 knots Max Ebb
Wed -- 10:46 AM PDT     0.00 knots Slack
Wed -- 12:05 PM PDT     Moonset
Wed -- 02:08 PM PDT     0.72 knots Max Flood
Wed -- 05:16 PM PDT     -0.00 knots Slack
Wed -- 07:54 PM PDT     Sunset
Wed -- 08:38 PM PDT     -0.97 knots Max Ebb
Wed -- 11:21 PM PDT     Moonrise
Wed -- 11:50 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
0.30.60.70.60.30-0.3-0.7-0.8-0.7-0.30.10.30.60.70.60.40.1-0.3-0.6-0.9-0.9-0.7-0.3

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 (17,4,5,8)
      (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.