Friday, February15, 2019 L-36.com


Marine Weather and Tides
Foster City, 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 6:56AMSunset 5:49PM Friday February 15, 2019 11:27 AM PST (19:27 UTC) Moonrise 1:37PMMoonset 3:30AM Illumination 85% Phase: Waxing Gibbous; Moon at 11 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- 857 Am Pst Fri Feb 15 2019
.small craft advisory in effect through this evening...
Today..SW winds 15 to 25 kt. Showers in the morning. Slight chance of Thunderstorms through the day. Showers likely in the afternoon.
Tonight..SW winds 10 to 20 kt. Showers likely.
Sat..W winds 5 to 15 kt. Chance of showers.
Sat night..W winds 5 to 15 kt. Slight chance of showers.
Sun..NW winds 5 to 15 kt. Slight chance of showers.
Washingtons birthday..NW winds 5 to 15 kt.
Tue..NW winds 5 to 15 kt.
PZZ500 857 Am Pst Fri Feb 15 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Cooler temperatures, gusty west to northwest winds, scattered showers and possibly a few Thunderstorms will continue into the weekend. A large northwest swell will arrive across the waters today and continue into the weekend.


7 Day Forecast for Marine Location Near Foster City city, CA
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location: 37.55, -122.24     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 151759
afdmtr
area forecast discussion
national weather service san francisco bay area
959 am pst Fri feb 15 2019

Synopsis Cool and showery conditions are expected today
through the weekend as a cold upper trough digs south along the
west coast. Snow levels will lower Friday into Saturday with the
potential for accumulating snowfall in the region's highest peaks.

Overnight temperatures will turn much colder by early next week
as dry weather develops and skies clear. Unsettled conditions
could return for the latter half of next week.

Discussion As of 09:11 am pst Friday... No major changes to the
forecast this morning as isolated to scattered showers continue to
move inland across the region. As expected, numerous reports of
very small hail are being reported region-wide as cold air
advection continues aloft. This too has resulted in lowering snow
levels with air temperature below freezing in the region's highest
peaks. Thus, cannot rule out snow showers in those higher
elevations.

Showers will persist as a reinforcing colder mid upper level
trough descends southward along the west coast through the
weekend. This too will lower snow levels with increasing chances
for accumulating snowfall in elevations above 2,500-3,000 feet
while rain showers persist off and on across the region. Will have
additional updates and details with respect the forecast for the
remainder of the weekend this afternoon. Until then, please see
the previous forecast discussion below.

Prev discussion As of 2:53 am pst Friday... A line of showers
moved through the district earlier producing brief, heavy rain as
it passed. This line was associated with a cold front that has
moved through. Scattered showers are expected to persist today
through the weekend as the area remains in a cold, unstable
airmass.

Temperatures have dropped considerably with the passage of the
cold front. Current readings at area airports are generally 15
degrees colder than they were 24 hours ago with mid to upper 40s
being reported. At higher elevations, automated weather stations
are picking up current temperatures in the 30s and lower 40s. Snow
levels are forecast to drop as low as 2500 feet today and perhaps
below 2000 feet by late Saturday night. Thus, snowfall is likely
on bay area peaks and accumulating snowfall is likely above 3000
feet. Also, small hail is likely at times with heavier showers.

Flood waters continue to recede in most areas. The flood warning
for the carmel river was cancelled last night, however, water
levels on the lower russian river continue to rise and is forecast
to crest within the next hour or two. A flood warning remains in
effect for the russian river near guerneville.

Drier weather is forecast to return by the beginning of the week.

Clearing skies will result in cold overnight temperatures.

Unsettled weather is possible by midweek.

Aviation As of 9:59 am pst Friday... Showers will continue
across area terminals today in the cold post frontal environment.

Vfr except MVFR in heavy showers, steadily lowering freezing
levels with snow at highest elevations through the weekend. Deeper
layer cooling arrives from the north later today, 500 mb
temperatures exceeding -30 celsius into tonight. Steepening
temperature lapse rates initiating isolated thunderstorms favoring
the bay area by late afternoon and evening, convective potential
up to several hundred j kg; will amend to add thunderstorms in
tafs as needed. Generally much less wind today, though
occasionally gusts to 20-25 knots nearest showers or isolated
thunderstorms are possible.

Vicinity of ksfo...VFR, gusty wind to 20-25 knots today. Showers
today tempo MVFR in showers mid to late evening.

Sfo bridge approach... Similar to sfo.

Monterey bay terminals...VFR except MVFR in showers particularly
this morning. SE wind becoming onshore and locally gusty to 20
knots by late morning. More showers arriving tonight and Saturday
morning.

Beaches 25 feet swell with moderate period 16 seconds reported
from buoy 59 located 400 miles northwest of the bay area. Large,
dangerous surf will reach the coastal waters today, a high surf
advisory begins 10 am today continuing to 9 pm Saturday. Northwest
swell 14 to 17 feet will produce breakers as high as 18 to 25 feet
along west and northwest facing beaches. High surf will also bring
coastal flooding impacts during high tide today. A coastal flood
advisory is in effect 5 am to 10 am this morning.

Marine As of 09:42 am pst Friday... Cooler temperatures, gusty
west to northwest winds, scattered showers and possibly a few
thunderstorms will continue into the weekend. A large northwest
swell will arrive across the waters today and continue into the
weekend.

Mtr watches warnings advisories
Tday High surf advisory... Caz006-505-509-529-530
coastal flood advisory... Caz006-505-506-508-509-529-530
sca... Pt arena to pt reyes 0-10 nm
sca... Pt reyes to pigeon pt 0-10 nm
sca... Pigeon pt to pt pinos 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... Rough bar advisory for sf bar
sca... Sf bay
sca... Mry bay
public forecast: rgass sims
aviation: cw
marine: cw
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RTYC1 - 9414523 - Redwood City, CA 3 mi45 min SW 8.9 G 14 50°F 53°F1016.5 hPa
AAMC1 - 9414750 - Alameda, CA 16 mi45 min WSW 15 G 18 51°F 52°F1016.2 hPa
LNDC1 17 mi39 min WSW 14 G 19 52°F 1015.8 hPa
OBXC1 18 mi39 min 51°F 40°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 18 mi45 min SW 23 G 29
OKXC1 - 9414776 - Oakland (Berth 34), CA 19 mi39 min WSW 11 G 20 52°F 1015.7 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 19 mi39 min W 8 G 21 52°F 1014.6 hPa
PXSC1 19 mi45 min 53°F 41°F
FTPC1 - 9414290 - San Francisco, CA 21 mi45 min SSW 8.9 G 17 52°F 54°F1015.9 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 25 mi39 min SSW 4.1 G 6 51°F 1015.8 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 26 mi64 min NE 5.1 49°F 1015 hPa
RCMC1 - 9414863 - Richmond, CA 27 mi39 min 53°F
UPBC1 34 mi39 min W 15 G 19
MZXC1 - 9415102 - Martinez-Amorco CA 34 mi45 min WSW 12 G 15 49°F 51°F1015.1 hPa47°F
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 35 mi27 min WSW 18 G 21 52°F 55°F1016.3 hPa (+1.9)
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 35 mi39 min W 8 G 9.9 49°F 1015.1 hPa
PCOC1 - 9415144 - Port Chicago, CA 37 mi45 min WSW 9.9 G 15 49°F 50°F1015.3 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 39 mi39 min WNW 6 G 9.9 46°F 1015.3 hPa
SFXC1 - San Francisco Bay Reserve, CA 46 mi102 min SW 9.9 49°F 1014 hPa43°F

Wind History for Redwood City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Carlos Airport, CA1 mi40 minSSW 85.00 miLight Rain50°F39°F67%1015.9 hPa
Palo Alto Airport, CA8 mi40 minWSW 1010.00 miRain52°F42°F72%1016.9 hPa
San Francisco, San Francisco International Airport, CA8 mi31 minSW 20 G 259.00 miLight Rain and Breezy53°F42°F66%1015.8 hPa
Hayward, Hayward Air Terminal, CA10 mi33 minSSW 1110.00 miMostly Cloudy53°F41°F64%1017 hPa
Oakland, Metro Oakland International Airport, CA10 mi34 minSW 1510.00 miMostly Cloudy54°F39°F59%1016.3 hPa
Mountain View, Moffett Field, CA13 mi31 minWSW 810.00 miMostly Cloudy53°F41°F64%1017 hPa
San Jose, San Jose International Airport, CA21 mi34 minWSW 710.00 miMostly Cloudy52°F41°F66%1016.3 hPa

Wind History from SQL (wind in knots)
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Last 24hrCalmCalmW7SW14SW10--SW7SW5SW5SE9SE9
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SW8SE3SW5SW6W9CalmS5CalmW53SE7SW8
1 day agoE9
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CalmS8S7W6
2 days ago33Calm4W4NW3S6--SE17
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Tide / Current Tables for Bay Slough, west end, San Francisco Bay, California
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Bay Slough
Click for Map
Fri -- 02:21 AM PST     2.98 feet Low Tide
Fri -- 03:29 AM PST     Moonset
Fri -- 06:58 AM PST     Sunrise
Fri -- 07:58 AM PST     8.29 feet High Tide
Fri -- 01:36 PM PST     Moonrise
Fri -- 03:43 PM PST     -0.27 feet Low Tide
Fri -- 05:48 PM PST     Sunset
Fri -- 10:26 PM PST     6.12 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.23.533.145.36.77.88.3875.53.820.7-0.1-0.20.31.42.84.25.466

Tide / Current Tables for San Mateo Bridge, South San Francisco Bay, California Current
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San Mateo Bridge
Click for Map
Fri -- 12:29 AM PST     -0.77 knots Max Ebb
Fri -- 03:13 AM PST     0.00 knots Slack
Fri -- 03:29 AM PST     Moonset
Fri -- 05:59 AM PST     1.19 knots Max Flood
Fri -- 06:58 AM PST     Sunrise
Fri -- 09:07 AM PST     -0.00 knots Slack
Fri -- 12:50 PM PST     -1.84 knots Max Ebb
Fri -- 01:36 PM PST     Moonrise
Fri -- 04:25 PM PST     0.00 knots Slack
Fri -- 05:48 PM PST     Sunset
Fri -- 07:20 PM PST     1.75 knots Max Flood
Fri -- 10:58 PM PST     -0.01 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.7-0.7-0.5-0.10.411.210.70.1-0.6-1.2-1.7-1.8-1.6-1-0.40.61.41.71.71.40.8-0

Weather Map and Satellite Images
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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.
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Wind Forecast for San Francisco/Monterey Bay Area, CA (14,3,4,5)
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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.