Saturday, April29, 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 6:13AMSunset 7:59PM Saturday April 29, 2017 8:13 PM PDT (03:13 UTC) Moonrise 8:13AMMoonset 10:49PM Illumination 17% Phase: Waxing Crescent; Moon at 4 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- 223 Pm Pdt Sat Apr 29 2017
Tonight..SW winds 5 to 15 kt.
Sun..SW winds 10 kt.
Sun night..W winds 5 to 15 kt.
Mon..NW winds 5 to 15 kt.
Mon night..W winds 5 to 15 kt.
Tue..W winds 10 kt.
Wed..N winds 10 kt...becoming west.
Thu..SW winds 10 kt.
PZZ500 223 Pm Pdt Sat Apr 29 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... High pressure will continue to bring strong, gusty northwest winds to the coastal waters this afternoon and evening. The strong winds will drive hazardous seas in the forms of steep fresh swells with relatively short periods. Strong winds will continue through the weekend and into early part of next week.

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 300023
afdmtr
area forecast discussion
national weather service san francisco bay area
523 pm pdt Sat apr 29 2017

Synopsis Seasonably warm weekend in place across the bay area
and central coast. Another round of offshore winds Monday and
Tuesday will drive temperatures even warmer early next week with
daytime highs into the 80s and some lower 90s for the warmest
interior valleys. Cooling trend back to normal by Thursday and
Friday as the next trough arrives on the coast.

Discussion As of 2:49 pm pdt Saturday... Decent warming today
across the district under sunny skies and high pressure aloft.

Current temperature readings are running warmer than yesterday at
this time with 60s at the immediate coast, and 70s to lower 80s
inland. Wind speeds have decreased in some areas today, but remain
gusty out of the west in the salinas valley and at sfo. With
clear skies tonight and decreasing winds, look for overnight lows
to cool into the mid 40s to lower 50s. Similar conditions are
expected on Sunday with perhaps a few degrees of warming under
sunny skies.

A shortwave trough forecast to move into the great basin late
Sunday night into Monday morning will increase surface pressure
gradients once again resulting in offshore winds across the hills
early Monday morning and then again Tuesday morning. Warming
aloft with light offshore flow and continued sunny days will
result in possibly the warmest weather so far this spring with
daytime highs well into the 80s and even some lower 90s for the
warmest inland valleys.

A cooling trend is expected to begin on Thursday, at least near
the coast with widespread inland cooling back to near or even
below normal by next Friday as an upper level trough approaches
the west coast. This trough is not expected to bring any rain to
our area, but cooler temperatures and possibly an increase in the
marine layer depth can be expected.

Aviation As of 5:23 pm pdt Saturday... It's a gorgeous afternoon,
not a cloud to be seen.VFR tonight and Sunday. There is the chance
for patchy coastal low stratus and fog to develop much later tonight,
but confidence in its development is low at this time, will monitor
it through the evening. The acv-sfo pressure gradient is 5.6 mb and
forecast to reach 7 mb to 8 mb tonight and Sunday as a surface ridge
edges in over far northwestern california. If stratus and fog do
develop it would quite likely either brush the immediate coastline
at times or parallel the coast staying just offshore under a stronger
northerly wind and trapped beneath strengthening marine inversions.

The wmc-sfo gradient will be increasing later Sunday into Monday
morning which may tend to push the surface thermal trough over
interior california to the coast in which case these conditions
would strongly favorVFR to continue from later Sunday into Monday.

Vicinity of ksfo...VFR. Westerly wind gusts to 25 knots til 04z
this evening, lighter winds tonight. Westerly winds become gusty
again Sunday afternoon and evening. Near high confidence.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals...VFR. Westerly winds becoming light later
this evening. Boundary layer rhs increase to near 100% very early
Sunday morning along the immediate coastline along the southern
monterey bay area to the carmel highlands per latest WRF model
run, it may be overdone in tonight's case, but will monitor it.

Marine As of 01:55 pm pdt Saturday... High pressure will
continue to bring strong, gusty northwest winds to the coastal
waters this afternoon and evening. The strong winds will drive
hazardous seas in the form of steep fresh swells with relatively
short periods. Strong winds will continue through the weekend and
into early part of next week.

Mtr watches/warnings/advisories
Tngt Sca... Pigeon pt to pt pinos 0-10 nm until 3 am
sca... Pt arena to pt reyes 0-10 nm
sca... Pt reyes to pigeon pt 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... Mry bay until 9 pm
public forecast: sims
aviation: canepa
marine: rowe
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RTYC1 - 9414523 - Redwood City, CA 8 mi43 min W 8.9 G 9.9 70°F 65°F1018 hPa
AAMC1 - 9414750 - Alameda, CA 13 mi43 min WNW 6 G 8.9 63°F 63°F1019.1 hPa
LNDC1 14 mi43 min W 1.9 G 4.1 65°F 1018.6 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 15 mi43 min W 2.9 G 5.1 63°F 1018.6 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 15 mi43 min SW 2.9 G 5.1 64°F 1017.5 hPa
OBXC1 15 mi43 min 62°F 50°F
PXSC1 15 mi43 min 62°F 47°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 15 mi43 min WSW 7 G 8
FTPC1 - 9414290 - San Francisco, CA 17 mi43 min WSW 12 G 18 56°F 56°F1018.8 hPa
46237 - San Francisco Bar, CA (142) 22 mi43 min 55°F5 ft
TIBC1 - Tiburon Pier, San Francisco Bay, CA 22 mi36 min Calm 62°F 1018 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 22 mi43 min SSW 6 G 8 60°F 1018.8 hPa
RCMC1 - 9414863 - Richmond, CA 24 mi43 min SE 2.9 G 5.1 63°F 58°F1018.1 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 30 mi83 min NW 12 G 16 53°F 52°F5 ft1019.5 hPa (-0.5)
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 32 mi43 min WSW 8 G 9.9 67°F 1017.7 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 32 mi43 min W 9.9 G 11 69°F 61°F1018.1 hPa48°F
UPBC1 33 mi43 min W 12 G 13
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 34 mi83 min NW 14 G 16 55°F 53°F5 ft1019.6 hPa (-0.5)
PCOC1 - 9415144 - Port Chicago, CA 35 mi43 min W 11 G 12 71°F 61°F1017.5 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 38 mi43 min NW 5.1 G 7 69°F 1017.3 hPa
PRYC1 - 9415020 - Point Reyes, CA 45 mi43 min WNW 19 G 25 55°F 55°F1018.4 hPa
SFXC1 - San Francisco Bay Reserve, CA 45 mi88 min WNW 7 74°F 1018 hPa48°F

Wind History for Redwood City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Francisco, San Francisco International Airport, CA3 mi17 minWNW 1710.00 miFair59°F44°F58%1018.5 hPa
San Carlos Airport, CA5 mi23 minW 710.00 miA Few Clouds68°F39°F35%1018.6 hPa
Oakland, Metro Oakland International Airport, CA9 mi20 minWNW 88.00 miFair63°F50°F63%1018.7 hPa
Hayward, Hayward Air Terminal, CA11 mi19 minW 810.00 miFair64°F46°F54%1019.5 hPa
Half Moon Bay Airport, CA11 mi18 minNNW 64.00 miFair with Haze54°F48°F82%1020 hPa
Palo Alto Airport, CA13 mi26 minNNW 810.00 miClear64°F53°F68%1018.3 hPa
Mountain View, Moffett Field, CA18 mi17 minN 1010.00 miFair65°F53°F66%1019 hPa

Wind History from SFO (wind in knots)
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Last 24hrW18W15W14W9W8NW14N11N9NE4CalmN10N12N8N7NW13N10N12N9W13W16W18W16W18W20
1 day agoNW17
G21
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W21W21W17W14W15W9W8W8W7W8W10W12W12W10W14W14W20W20W20W23W21W19
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2 days agoW14
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W19W19
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W20W19NW11W15W16W11W8W4N3N4W9W18W15W18W19
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Tide / Current Tables for Coyote Point Marina, San Francisco Bay, California
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Coyote Point Marina
Click for Map
Sat -- 02:33 AM PDT     7.88 feet High Tide
Sat -- 06:15 AM PDT     Sunrise
Sat -- 09:13 AM PDT     Moonrise
Sat -- 09:37 AM PDT     -1.31 feet Low Tide
Sat -- 04:22 PM PDT     6.36 feet High Tide
Sat -- 07:57 PM PDT     Sunset
Sat -- 09:39 PM PDT     2.19 feet Low Tide
Sat -- 11:49 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
5.56.97.77.86.95.33.31.3-0.2-1.1-1.2-0.50.92.64.35.66.36.25.44.23.12.42.22.9

Tide / Current Tables for San Mateo Bridge, South San Francisco Bay, California Current
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San Mateo Bridge
Click for Map
Sat -- 12:31 AM PDT     1.58 knots Max Flood
Sat -- 03:37 AM PDT     -0.00 knots Slack
Sat -- 06:15 AM PDT     Sunrise
Sat -- 07:20 AM PDT     -2.17 knots Max Ebb
Sat -- 09:13 AM PDT     Moonrise
Sat -- 10:40 AM PDT     0.01 knots Slack
Sat -- 01:33 PM PDT     2.08 knots Max Flood
Sat -- 05:21 PM PDT     -0.00 knots Slack
Sat -- 07:57 PM PDT     Sunset
Sat -- 07:58 PM PDT     -1.10 knots Max Ebb
Sat -- 10:41 PM PDT     0.00 knots Slack
Sat -- 11:49 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.51.51.10.5-0.3-1-1.8-2.1-2-1.4-0.60.41.4221.71.10.3-0.4-0.9-1.1-0.8-0.40.2

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 (23,6,7,8)
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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.