Wednesday, March22, 2017 L-36.com


Marine Weather and Tides
San Mateo, CA

Version 3.4
What's New / NOTES
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 7:06AMSunset 7:25PM Wednesday March 22, 2017 5:25 PM PDT (00:25 UTC) Moonrise 2:40AMMoonset 1:04PM Illumination 22% Phase: Waning Crescent; Moon at 25 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 San Francisco Bay North Of The Bay Bridge- 150 Pm Pdt Wed Mar 22 2017
Tonight..W winds 10 to 20 kt.
Thu..W winds 5 to 15 kt.
Thu night..S winds 10 to 20 kt. Slight chance of rain in the evening, then chance of rain after midnight.
Fri..S winds 15 to 25 kt. Rain.
Fri night..SW winds 5 to 15 kt. Rain likely in the evening, then chance of showers after midnight.
Sat..W winds 5 to 15 kt.
Sun..SW winds 10 kt. Chance of showers.
Mon..W winds 10 kt...increasing to 10 to 20 kt. Chance of showers.
PZZ500 150 Pm Pdt Wed Mar 22 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Increasing northwest winds through Thursday morning. Winds will weaken then turn southerly ahead of the next system through the day Thursday. Strong south to southwest winds will then prevail as a storm system moves across the coastal waters. High winds and seas can be expected Friday as the front moves through.

7 Day Forecast for Marine Location Near San Mateo, CA
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location: 37.59, -122.31     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 222137
afdmtr
area forecast discussion
national weather service san francisco bay area
237 pm pdt Wed mar 22 2017

Synopsis Scattered showers along with a few thunderstorms can
be expected into the early evening hours. The next storm system
is projected to impact the region late week. Widespread rainfall
and stronger winds return to the northern portion of the region
late Thursday and will spread southward during the day Friday. Dry
conditions return for most of Saturday with another weak system
forecast to push through starting Saturday night. Dry weather and
warmer temperatures are then likely next week.

Discussion As of 3:00 pm pdt Wednesday... Kmux radar shows
scattered showers continuing across our region -- especially for
the southern third of the cwa. Returns indicate a few moderate
cells so would expect a few are dropping small hail. Showers will
greatly diminish once the Sun GOES down, and additional
accumulations will mostly be under a tenth.

Dry weather will return for tonight through the majority of
Thursday before another system from the north moves through and
brings widespread rainfall back into the picture. Models have been
advertising this system for nearly a week and the latest guidance
has only slightly wavered from previous runs. Now looks like rain
will move into the north bay Thursday night, down to sf bay Friday
morning and to monterey bay starting around noon. However, the
main story will be the moderate to heavy band of rain associated
with a surface front that will go through later than the initial
round of rain. That band could produce high rain rates for a brief
period possibly leading to some urban and small stream issues. At
the same time southerly winds will be on the increase as the front
approaches. Gusts in many urban locations of 25 to 35 mph can be
expected. Values to 50 mph are possible above 1,500 feet. Guidance
has slightly trended downward so at this time do not expect to
issue wind advisories.

Rainfall amounts have only slightly changed from previous forecast
packages. Still looks that the best ivt numbers (and longest
duration) will focus on the north bay with widespread 1.5-3"
expected (locally 4+" for the north bay mountains). Similar values
can be expected for the sc mountains plus the santa lucias.

Around sf bay generally 2/3" to 1.5" is forecast with mostly less
than 2/3" from the santa clara valley southward.

Behind the front scattered showers are possible into early
Saturday. This will be followed quickly by another system that
will again move north-to-south late Saturday night through
Sunday. This feature will be the weakest of the week and rainfall
totals should be generally under 1/2" for most urban locations.

A ridge of high pressure will build behind that system and bring
warmer and drier conditions back to our region for most of next
week and possibly through the following week.

Aviation As of 10:50 am pdt Wednesday... Expect to see a trend
towards gradually improving ceilings, visibilities, and fewer rain
showers today. The bulk of the rain activity has now shifted
eastward into the central valley, however, isolated to scattered
rain showers could continue into the afternoon (primarily for
east bay and monterey bay regions). Winds will become breezy this
afternoon, especially around the san francisco bay. Model data
indicating potential for 2000-3000 ft CIGS overnight.

Vicinity of ksfo...VFR. Onshore winds 10-20kt. Occasional gust to
25-30kt possible this afternoon.

Sfo bridge approach... Same as ksfo.

Monterey bay terminals... PatchworkVFR/MVFR due to lowered
ceilings. Some rain showers will move across the monterey bay
terminals through late morning into the early afternoon.

Marine As of 02:24 pm pdt Wednesday... Increasing northwest
winds through Thursday morning. Winds will weaken then turn
southerly ahead of the next system through the day Thursday.

Strong south to southwest winds will then prevail as a storm
system moves across the coastal waters. High winds and seas can
be expected Friday as the front moves through.

Mtr watches/warnings/advisories
Tngt Sca... Pigeon pt to pt pinos 0-10 nm from 9 pm until 3 am
sca... Pt arena to pt reyes 0-10 nm until 3 am
sca... Pt reyes to pigeon pt 0-10 nm until 3 am
sca... Pt arena to pigeon pt 10-60 nm until 3 am
sca... Pt pinos to pt piedras blancas 0-10 nm
public forecast: bell
aviation: drp
marine: drp
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RTYC1 - 9414523 - Redwood City, CA 8 mi38 min W 14 G 17 56°F 60°F1018.1 hPa
AAMC1 - 9414750 - Alameda, CA 13 mi38 min W 11 G 16 56°F 62°F1018.7 hPa
LNDC1 14 mi74 min W 12 G 18 57°F 1018.2 hPa
OBXC1 15 mi38 min 55°F 45°F
PXSC1 15 mi38 min 56°F 43°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 15 mi38 min W 20 G 23
OKXC1 - 9414776 - Oakland (Berth 34), CA 15 mi38 min W 19 G 23 55°F 1018.1 hPa
FTPC1 - 9414290 - San Francisco, CA 17 mi38 min W 8.9 G 15
46237 - San Francisco Bar, CA (142) 22 mi56 min 57°F9 ft
PPXC1 - 9414847 - Richmond (Point Potrero), CA 22 mi38 min WNW 14 G 18 59°F 1018 hPa
RCMC1 - 9414863 - Richmond, CA 24 mi38 min WNW 8.9 G 13
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 30 mi36 min WNW 16 G 19 54°F 55°F8 ft1018.8 hPa (-0.4)
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 32 mi38 min W 9.9 G 14 59°F 1017.5 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 32 mi38 min W 15 G 20 57°F 59°F1017.7 hPa43°F
UPBC1 33 mi38 min W 16 G 19
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 34 mi36 min WNW 14 G 18 54°F 56°F9 ft1018.8 hPa (-0.3)
PCOC1 - 9415144 - Port Chicago, CA 35 mi38 min W 19 G 21 57°F 60°F1017.4 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 38 mi38 min WNW 15 G 20 59°F 1017 hPa
PRYC1 - 9415020 - Point Reyes, CA 45 mi38 min WNW 16 G 23 55°F 56°F1018.6 hPa
SFXC1 - San Francisco Bay Reserve, CA 45 mi101 min WNW 15 62°F 1017 hPa44°F

Wind History for Redwood City, CA
(wind in knots)    EDIT      (on/off)   Help
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1 day
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SE9
G13
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G15
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G11
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G16
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N8
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G16
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G13

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Francisco, San Francisco International Airport, CA3 mi30 minW 2010.00 miPartly Cloudy and Breezy56°F42°F60%1018.5 hPa
San Carlos Airport, CA5 mi39 minW 1310.00 miPartly Cloudy57°F39°F51%1018.6 hPa
Oakland, Metro Oakland International Airport, CA9 mi33 minW 1910.00 miPartly Cloudy and Breezy60°F44°F56%1018.2 hPa
Hayward, Hayward Air Terminal, CA11 mi32 minW 1610.00 miFair59°F39°F49%1019.3 hPa
Half Moon Bay Airport, CA11 mi31 minNW 15 G 199.00 miFair55°F46°F72%1019 hPa
Palo Alto Airport, CA13 mi39 minWNW 1210.00 miPartly Cloudy59°F44°F59%1018.3 hPa
Mountain View, Moffett Field, CA18 mi30 minWNW 7 G 1810.00 miPartly Cloudy59°F39°F49%1018.6 hPa

Wind History from SFO (wind in knots)
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Last 24hrSW13S16S10
G16
S9S9--S14SE13S9SW9S4W8W12W8W6W11NW9W10NW15NW14
G18
W14W17W16W16
G24
1 day agoSE13SE15SE7SE7SE7E4S8SE8SE12SE8E9SE11
G19
6S7SE9S6W8W9SW7S10
G18
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2 days agoNW13W12SW6NW7CalmSW3W4W4W7W3CalmS12
G17
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G23
SE9SE9SE9SE11SE13SE12SE13SE11SE10SE12SE11

Tide / Current Tables for Coyote Point Marina, San Francisco Bay, California
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Coyote Point Marina
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Wed -- 02:37 AM PDT     2.98 feet Low Tide
Wed -- 03:40 AM PDT     Moonrise
Wed -- 07:09 AM PDT     Sunrise
Wed -- 08:13 AM PDT     6.31 feet High Tide
Wed -- 02:04 PM PDT     Moonset
Wed -- 03:22 PM PDT     0.63 feet Low Tide
Wed -- 07:23 PM PDT     Sunset
Wed -- 10:11 PM PDT     5.87 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
4.33.63.133.54.35.25.96.36.15.44.33.121.10.70.71.32.33.44.55.45.95.7

Tide / Current Tables for San Mateo Bridge, South San Francisco Bay, California Current
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San Mateo Bridge
Click for Map
Wed -- 12:56 AM PDT     -0.64 knots Max Ebb
Wed -- 03:39 AM PDT     Moonrise
Wed -- 04:11 AM PDT     0.00 knots Slack
Wed -- 06:39 AM PDT     0.87 knots Max Flood
Wed -- 07:08 AM PDT     Sunrise
Wed -- 09:43 AM PDT     -0.00 knots Slack
Wed -- 01:10 PM PDT     -1.35 knots Max Ebb
Wed -- 02:03 PM PDT     Moonset
Wed -- 04:52 PM PDT     0.01 knots Slack
Wed -- 07:23 PM PDT     Sunset
Wed -- 07:51 PM PDT     1.40 knots Max Flood
Wed -- 11:13 PM PDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.6-0.6-0.6-0.4-0.10.40.80.90.70.4-0.1-0.7-1.2-1.3-1.2-1-0.60.10.91.31.41.30.80.2

Weather Map and Satellite Images
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Weather Map
wmap_P
IR Satellite Image from GEOS
west_satellite

GOES Local Image of CentralWestCoast    EDIT
Geos

Wind Forecast for San Francisco/Monterey Bay Area, CA (20,4,5,8)
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Ground Weather Radar Station San Francisco Bay Area, CA
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weather_mapweather_map weather_map

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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.