Wednesday, April24, 2019 L-36.com


Marine Weather and Tides
Brisbane, 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 6:21AMSunset 7:54PM Wednesday April 24, 2019 1:58 AM PDT (08:58 UTC) Moonrise 12:00AMMoonset 9:28AM Illumination 76% Phase: Waning Gibbous; Moon at 20 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
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PZZ530 San Pablo Bay, Suisun Bay, The West Delta And The San Francisco Bay North Of The Bay Bridge- 853 Pm Pdt Tue Apr 23 2019
Tonight..SW winds 5 to 15 kt...diminishing to up to 10 kt after midnight.
Wed..SW winds 5 to 15 kt.
Wed night..SW winds 5 to 15 kt.
Thu..SW winds 5 to 15 kt with gusts up to 25 kt.
Thu night..SW winds 5 to 15 kt.
Fri..SW winds 5 to 15 kt.
Fri night..SW winds 5 to 15 kt.
Sat..SW winds up to 10 kt.
Sun..SW winds 5 to 10 kt.
PZZ500 853 Pm Pdt Tue Apr 23 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... High pressure off of the california coast will continue to shift slowly northward tonight and Wednesday. Winds over the northern waters will remain moderate and gusty resulting in steep, short- period swells. Elsewhere, winds will be weaker overall but will become locally gusty at times in the afternoon and evening hours near the coast.


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


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 240546
afdmtr
area forecast discussion
national weather service san francisco bay area
1046 pm pdt Tue apr 23 2019

Synopsis Well above normal temperatures today with high
pressure and offshore winds in place. A few degrees of cooling
possible by Wednesday for the north bay, but no big changes in the
weather pattern. Onshore winds return by late in the week and
into the weekend with temperatures gradually returning to seasonal
normal values.

Discussion As of 9:11 pm pdt Tuesday... Record breaking
temperatures were felt across the region today as an upper level
ridge of high pressure nudge in over the northern half of the
state. 9 climate stations records were broken or tied for this day
in our forecast area alone. Temperatures finished off the day
anywhere from around 15 to 22 degrees over yesterdays highs.

Offshore flow brought warm hot dry air all the way to coast with
coastal areas seeing temperatures anywhere from the 60s at the
immediate coast to near 80 degrees a few mile inland or even
closer where downsloping resulted in adiabatic heating. Elsewhere
widespread mid to upper 80s were reported. In the warmest
sheltered inland areas highs topped out in the 90s with healdsburg
reporting our warmest high temperature of 97 degrees this
afternoon. For a complete list of records see the climate section
below for the sforermtr (record event report).

Mainly clear skies will prevail tonight with a few high clouds
spilling over the upper level ridge and across the state. Stratus
remains well off the coast at this hour and is forecast to remain
offshore at least one more night before onshore flow once again
ushers the low clouds back toward the coast.

The forecast remains on track with onshore flow expected to return
Wednesday resulting in cooler temperatures along the coast. Little
change is anticipated inland where warm and dry conditions are
forecast to continue. As the week progresses a very subtle
cooling trend is expected. Temperatures will return to near normal
over the weekend.

From previous discussion... Warm-to-hot day across the san
francisco bay area and central california coast as an upper level
ridge axis sits over the northern half of california. The 12z
oakland sounding earlier this morning resulted in 925 mb, 850 mb,
700 mb, and 500 mb heights and temperatures at above the 90th
percentile for this calendar day (according to the storm
prediction center's sounding climatology page). The sfo-sac
surface pressure gradient as of 19z was -0.3 mb. All of these
parameters are good ingredients for producing an anomalously warm
middle to late april afternoon. Early afternoon surface
observations are in agreement with this thinking as temperatures
are generally running a solid 3-8 degrees warmer than mid-day
yesterday. By the time the afternoon wraps up, we'll see
widespread 70s for coastal communities, and 80s to low 90s for
interior valleys and the santa cruz mountains. This equates to
around 10-20 degrees warmer than climatological normal values.

The positively-tilted ridge axis responsible for the warm-to-hot
temperatures is progged to slide southeastward over the next 24
hours as the center of the upper level ridge offshore weakens
slightly. This should result in some cooling for Wednesday
afternoon for the north bay while interior locations in monterey
and san benito counties may actually see some day-to-day warming
as the ridge axis shifts. The marine layer appears that it will
struggle to redevelop tonight, though there are hints of it
returning sometime on Wednesday night or Thursday for the central
coast.

Widespread day-to-day cooling should commence beginning Thursday
as the ridge continues to weaken and upper level heights drop over
our region. By 00z Friday, models place a weak upper level low
around 31 deg n, 139 deg W (or about 1300 miles west of san
diego), and have it push eastward toward southern california
through over the course of the weekend. For our area of the state,
most locations should remain dry, though parts of rural monterey
county have a slight chance of experiencing light rain showers.

Model solutions begin to diverge by the beginning of next week.

The climate prediction center's 6-10 and 8-14 day outlooks provide
equal chances for above and below normal temps for our part of
the state (i.E., no clear signal one way or the other).

Aviation As of 10:45 pm pdt Tuesday... For 06z tafs.VFR
conditions and mostly clear skies prevail across the district,
aside from some thin high cloudiness passing through. The kacv to
ksfo pressure gradient has strengthened even a bit more during the
evening hours, now up at 8.3 mb. Consistent with this, latest
model output and statistical guidance continues to indicate
minimal coastal stratus development overnight, with even much of
the coast itself likely to stay mostly clear. Therefore expect
both san francisco bay area and monterey bay terminals to remain
vfr through the night.

Vicinity of ksfo...VFR conditions are forecast to prevail through
the night and on Wednesday. High confidence.

Sfo bridge approach... Same as ksfo.

Monterey bay terminals...VFR conditions are forecast to prevail through
the night and on Wednesday. Moderate-to-high confidence.

Marine As of 08:53 pm pdt Tuesday... High pressure off of the
california coast will continue to shift slowly northward tonight
and Wednesday. Winds over the northern waters will remain moderate
and gusty resulting in steep, short- period swells. Elsewhere,
winds will be weaker overall but will become locally gusty at
times in the afternoon and evening hours near the coast.

Climate Sforermtr... (record event report)

Record high maximum temperatures Tuesday, april 23, 2019...

location MAX temp previous record
-----------------------------------------------------------------
santa rosa 93 90 in 1946
hollister 89 84 in 2004
san francisco airport 88 85 in 1959
moffett field 88 86 in 1946
oakland museum 87 80 in 1999
carmel valley 87 85 in 1966
king city 92 (tied) 92 in 1977
gilroy 91 (tied) 91 in 1987
redwood city 90 (tied) 90 in 1946

Mtr watches warnings advisories
Tngt Sca... Pt arena to pt reyes 0-10 nm
sca... Pt arena to pigeon pt 10-60 nm
sca... Pigeon pt to pt piedras blancas 10-60 nm
public forecast: cw
aviation: blier
marine: blier
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
AAMC1 - 9414750 - Alameda, CA 8 mi40 min N 1.9 G 5.1 63°F 64°F1014.1 hPa
PXSC1 9 mi40 min 61°F 54°F
OBXC1 9 mi40 min 60°F 57°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 9 mi40 min NNW 2.9 G 4.1
PXOC1 - 9414311 - San Francisco (Pier 1), CA 9 mi40 min Calm G 1.9 60°F 1012.7 hPa
FTPC1 - 9414290 - San Francisco, CA 10 mi40 min W 4.1 G 8.9 56°F 57°F1014.1 hPa
LNDC1 10 mi40 min N 4.1 G 5.1 62°F 1013.6 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 10 mi40 min NW 5.1 G 5.1 59°F 1013.7 hPa
RTYC1 - 9414523 - Redwood City, CA 14 mi40 min NW 1.9 G 2.9 63°F 67°F1014.1 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 16 mi47 min W 1.9 63°F 1014 hPa
46237 - San Francisco Bar, CA (142) 16 mi88 min 54°F5 ft
PPXC1 - 9414847 - Richmond (Point Potrero), CA 16 mi40 min 59°F 1013.9 hPa
RCMC1 - 9414863 - Richmond, CA 18 mi40 min SE 1.9 G 4.1 62°F 60°F1013.3 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 25 mi38 min NW 12 G 14 53°F 52°F1014.8 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 27 mi40 min Calm G 1 63°F 1013.1 hPa
UPBC1 29 mi40 min WNW 7 G 9.9
MZXC1 - 9415102 - Martinez-Amorco CA 29 mi40 min W 7 G 8 65°F 63°F1013.1 hPa64°F
PCOC1 - 9415144 - Port Chicago, CA 32 mi40 min SW 9.9 G 9.9 66°F 63°F1012.9 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 37 mi40 min WNW 6 G 8.9 69°F 1012.2 hPa
PRYC1 - 9415020 - Point Reyes, CA 39 mi40 min 54°F1014.2 hPa
SFXC1 - San Francisco Bay Reserve, CA 41 mi73 min SW 4.1 65°F 1013 hPa55°F

Wind History for Alameda, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Francisco, San Francisco International Airport, CA4 mi62 minW 710.00 miA Few Clouds58°F50°F75%1013.4 hPa
Oakland, Metro Oakland International Airport, CA9 mi65 minNW 78.00 miA Few Clouds62°F55°F80%1013.6 hPa
San Carlos Airport, CA12 mi63 minNW 48.00 miFair64°F55°F73%1013.9 hPa
Half Moon Bay Airport, CA13 mi63 minN 05.00 miFog/Mist50°F48°F94%1014.9 hPa
Hayward, Hayward Air Terminal, CA14 mi64 minN 010.00 miFair64°F55°F75%1014.3 hPa
Mountain View, Moffett Field, CA24 mi62 minNW 510.00 miFair66°F55°F70%1014 hPa

Wind History from SFO (wind in knots)
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Last 24hrW4W4W3CalmCalmW3CalmN4NE4NE5NE4E3CalmNW10W12W14W10W8NW9W10W10W9W8W7
1 day agoW11W7W6W4CalmCalmCalmCalmNE3E4E4NW7W15W18W16W20W19
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2 days agoW10W8W6W4W5W4W3E4E4NE4NE4W18W19W20W19W23W22W22
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Tide / Current Tables for Oyster Point Marina, San Francisco Bay, California
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Oyster Point Marina
Click for Map
Wed -- 12:34 AM PDT     Moonrise
Wed -- 03:59 AM PDT     6.46 feet High Tide
Wed -- 06:22 AM PDT     Sunrise
Wed -- 10:28 AM PDT     Moonset
Wed -- 11:07 AM PDT     -0.30 feet Low Tide
Wed -- 06:25 PM PDT     5.47 feet High Tide
Wed -- 07:53 PM PDT     Sunset
Wed -- 11:25 PM PDT     3.13 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.54.55.56.26.56.25.23.82.310.1-0.3-0.10.71.72.944.95.45.44.94.23.53.2

Tide / Current Tables for Sierra Point 1.3 mi ENE, South San Francisco Bay, California Current
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Sierra Point 1.3 mi ENE
Click for Map
Wed -- 12:34 AM PDT     Moonrise
Wed -- 01:24 AM PDT     0.55 knots Max Flood
Wed -- 04:12 AM PDT     -0.00 knots Slack
Wed -- 06:22 AM PDT     Sunrise
Wed -- 07:51 AM PDT     -1.16 knots Max Ebb
Wed -- 10:27 AM PDT     Moonset
Wed -- 11:31 AM PDT     0.01 knots Slack
Wed -- 02:48 PM PDT     0.85 knots Max Flood
Wed -- 06:22 PM PDT     -0.00 knots Slack
Wed -- 07:53 PM PDT     Sunset
Wed -- 08:37 PM PDT     -0.45 knots Max Ebb
Wed -- 11:45 PM PDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.40.50.50.30.1-0.3-0.7-1.1-1.2-1-0.6-0.20.20.60.80.80.80.50.2-0.2-0.4-0.4-0.3-0.2

Weather Map and Satellite Images
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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.
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Wind Forecast for San Francisco/Monterey Bay Area, CA (4,6,7,8)
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Ground Weather Radar Station San Francisco Bay Area, CA
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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.