Tuesday, March28, 2017 L-36.com


Marine Weather and Tides
Emerald Lake Hills, 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 6:57AMSunset 7:30PM Tuesday March 28, 2017 6:23 PM PDT (01:23 UTC) Moonrise 6:36AMMoonset 7:27PM Illumination 2% Phase: Waxing Crescent; Moon at 2 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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PZZ545 Point Reyes To Pigeon Point To 10 Nm- 224 Pm Pdt Tue Mar 28 2017
.small craft advisory for rough bar in effect through late tonight...
.small craft advisory in effect through late Wednesday night...
Tonight..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. W swell 9 to 12 ft at 16 seconds.
Wed..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. W swell 9 to 11 ft at 16 seconds.
Wed night..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. W swell 8 to 10 ft at 15 seconds. Slight chance of showers after midnight.
Thu..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. W swell 8 to 10 ft at 15 seconds. Slight chance of showers in the morning.
Thu night..NW winds 20 to 30 kt. Wind waves 4 to 6 ft. W swell 8 to 10 ft at 14 seconds.
Fri..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. W swell 9 to 12 ft.
Sat..NW winds 10 to 20 kt. Wind waves 2 to 4 ft. W swell 8 to 10 ft.
Sun..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. W swell 8 to 10 ft...increasing to 9 to 12 ft.
...san francisco bar/fourfathom bank forecast..... In the deep water channel...combined seas 9 to 11 ft with a dominant swell period of 17 seconds. Across the bar...combined seas 10 to 12 ft with a dominant swell period of 17 seconds. Maximum ebb current of 1.6 knots at 04:06 pm Tuesday and 1.7 knots at 04:30 am Wednesday.
PZZ500 224 Pm Pdt Tue Mar 28 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Moderate and gusty northwest winds will continue through the next several days as high pressure strengthens over the eastern pacific and tightens the pressure gradient along the central coast of california. Northwest swell will slowly decrease some tonight and will continue to through about Thursday morning before building again late Thursday and through the weekend.

7 Day Forecast for Marine Location Near Emerald Lake Hills, CA
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location: 37.44, -122.34     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 282049
afdmtr
area forecast discussion
national weather service san francisco bay area
149 pm pdt Tue mar 28 2017

Synopsis A gradual warming trend will continue through
Wednesday as high pressure builds over the region. Cooler and
breezy conditions return on Thursday as a cold front sweeps
through the region. While a few light rain showers will be
possible, most locations will remain dry. The ridge will then
rebuild back over the region late in the week resulting in another
warming trend heading into the upcoming weekend.

Discussion As of 01:48 pm pdt Tuesday... High pressure building
over the region has resulted in mostly sunny skies and an uptick
in daytime temperatures compared to yesterday. The ridge aloft
will continue to build and bring even warmer temperatures on
Wednesday with inland areas reaching into the 70s to lower 80s.

Dry weather conditions will also prevail.

By late Wednesday night, the forecast models continue to indicate
a mid/upper level trough will push into the pacific northwest. As
the trough pushes inland, a cold front will drop southward into
northern california and bring the potential for light
precipitation. While the best chances for measurable rainfall will
be to our north, cannot rule out some light rain showers across
the north bay Wednesday night into early Thursday morning. Light
precipitation in the form of showers or sprinkles may drop as far
south as the central coast just before sunrise Thursday morning.

With that said, most locations will remain dry or only see trace
amounts of rainfall from this passing system. Temperatures cool in
wake of the frontal passage with only 60s and lower 70s expected
for Thursday afternoon. Northerly winds will also increase as the
main mid/upper level low slides down into the desert southwest and
the surface pressure gradient tightens along the coast. Breezy
conditions then persist into Friday before the mid/upper level
trough pushes further to the east. May see a few degrees of
warming by Friday afternoon, yet conditions will feel cool given
the breezy northerly winds.

High pressure is forecast to rebuild back across the region late
Friday into the upcoming weekend. As a result, inland areas will
rebound back into the 70s and lower 80s with mostly sunny skies.

Medium range guidance suggest dry weather and seasonably mild
temperatures will persist into early next week as well with the
ridge aloft. While confidence this far out remains low, the models
do hint at the potential return to a wetter pattern late next
week.

Aviation As of 10:33 am pdt Tuesday for 18z tafs. Current vsbl
satellite imagery shows few-sct high clouds over the region.

Expect this to be the case through the day. Biggest story will be
the winds today. West/northwest winds will pick up and become
gusty in the next hour or two. Winds won't be quite as gusty today
as yesterday, but will still gust 20-25 kt, locally higher,
through roughly about 03z (8pm pdt) at most terminals. Threw in a
chance of low clouds for the monterey bay terminals for Wednesday
morning. There could be a couple of hours of stratus around
sunrise, but confidence is low at this time. Overall, moderate to
high confidence with this forecast.

Vicinity of ksfo...VFR conditions anticipated. West to northwest
winds exceeding 20 to 25 kt possible through the evening, possibly
higher at ksfo.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals...VFR through the rest of the day. Tafs
reflect MVFR CIGS around sunrise Wednesday morning, but should
lift by 16z, if CIGS develop at all. Gusty west/northwest winds by
21z (2pm pdt) this afternoon, around 20 kt, diminishing around
03z.

Marine As of 08:25 am pdt Tuesday... A long period northwest
swell... 17 to 18 seconds... Will move through the coastal waters
today. Moderate and gusty northwest winds will continue for the
next several days as a strong surface pressure gradient builds
over the region.

Mtr watches/warnings/advisories
Tngt 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 until 3 am
sca... Mry bay until 9 pm
public forecast: rgass
aviation: bm
marine: bm
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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 mi53 min WNW 13 G 16 66°F 61°F1020.3 hPa
AAMC1 - 9414750 - Alameda, CA 23 mi53 min W 7 G 12 66°F 60°F1021.1 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 25 mi53 min W 5.1 G 6
PXSC1 25 mi53 min 68°F 46°F
LNDC1 25 mi53 min W 6 G 8.9 68°F 1020.6 hPa
OBXC1 25 mi53 min 65°F 51°F
FTPC1 - 9414290 - San Francisco, CA 26 mi53 min WSW 7 G 15 63°F 57°F1021.1 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 26 mi53 min W 4.1 G 4.1 65°F 1020.7 hPa
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 29 mi93 min NW 21 G 25 57°F 56°F13 ft1021.6 hPa (-1.0)
46237 - San Francisco Bar, CA (142) 29 mi53 min 56°F10 ft
PPXC1 - 9414847 - Richmond (Point Potrero), CA 32 mi53 min WNW 12 G 16 71°F 1020.7 hPa
RCMC1 - 9414863 - Richmond, CA 34 mi53 min WNW 7 G 11 66°F 58°F1020.4 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 34 mi93 min NNW 19 G 23 56°F 55°F11 ft1022 hPa (-1.2)
UPBC1 43 mi53 min N 12 G 16
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 43 mi53 min SSW 5.1 G 7 66°F 1020.4 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 43 mi53 min NW 7 G 14 71°F 57°F1020.7 hPa44°F
PCOC1 - 9415144 - Port Chicago, CA 45 mi53 min NNE 8.9 G 12 69°F 58°F1020.2 hPa
46042 - MONTEREY - 27NM West of Monterey Bay, CA 45 mi93 min 18 G 21 57°F 56°F14 ft1021.9 hPa (-0.4)
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 48 mi53 min NNE 14 G 17 69°F 1020.3 hPa

Wind History for Redwood City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Carlos Airport, CA8 mi35 minW 1110.00 miA Few Clouds68°F44°F43%1021 hPa
Half Moon Bay Airport, CA10 mi28 minNNW 15 G 245.00 miFair with Haze59°F48°F68%1022 hPa
San Francisco, San Francisco International Airport, CA12 mi27 minW 1810.00 miPartly Cloudy and Breezy63°F46°F54%1021.1 hPa
Palo Alto Airport, CA12 mi36 minWNW 1210.00 miClear70°F48°F46%1020.7 hPa
Mountain View, Moffett Field, CA15 mi27 minNNW 910.00 miFair70°F46°F42%1021 hPa
Oakland, Metro Oakland International Airport, CA19 mi30 minW 1310.00 miA Few Clouds68°F52°F57%1020.6 hPa
Hayward, Hayward Air Terminal, CA19 mi29 minNW 910.00 miFair66°F48°F52%1021.6 hPa
San Jose, San Jose International Airport, CA22 mi30 minNNW 1310.00 miA Few Clouds69°F46°F45%1020.4 hPa

Wind History from SQL (wind in knots)
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Last 24hrW15W13
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NW5W3NW5W4CalmW3CalmCalmW3CalmNW4CalmNW7NW7
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NW10NW15W14
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1 day agoSW10
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SW13S7W8NW6W7W5W5W4W3W3W4W4NW4W8NW9NW12NW11
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2 days agoW9W8W5NW4W4W4SW3SW3S3CalmCalmCalmCalm43445E7NE6NE4SW7S8S8

Tide / Current Tables for Smith Slough, San Francisco Bay, California
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Smith Slough
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Tue -- 01:44 AM PDT     7.84 feet High Tide
Tue -- 06:59 AM PDT     Sunrise
Tue -- 07:36 AM PDT     Moonrise
Tue -- 08:15 AM PDT     0.39 feet Low Tide
Tue -- 02:02 PM PDT     7.72 feet High Tide
Tue -- 07:28 PM PDT     Sunset
Tue -- 08:25 PM PDT     Moonset
Tue -- 08:28 PM PDT     0.43 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
6.27.57.87.25.94.12.310.40.723.85.67.17.77.46.24.62.81.30.50.61.73.5

Tide / Current Tables for San Mateo Bridge, South San Francisco Bay, California Current
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San Mateo Bridge
Click for Map
Tue -- 02:15 AM PDT     -0.00 knots Slack
Tue -- 05:26 AM PDT     -1.82 knots Max Ebb
Tue -- 06:59 AM PDT     Sunrise
Tue -- 07:36 AM PDT     Moonrise
Tue -- 08:25 AM PDT     0.01 knots Slack
Tue -- 11:12 AM PDT     2.01 knots Max Flood
Tue -- 02:38 PM PDT     -0.01 knots Slack
Tue -- 05:47 PM PDT     -1.77 knots Max Ebb
Tue -- 07:28 PM PDT     Sunset
Tue -- 08:25 PM PDT     Moonset
Tue -- 08:44 PM PDT     0.01 knots Slack
Tue -- 11:29 PM PDT     1.93 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.71.10.3-0.6-1.4-1.8-1.7-1.1-0.40.61.521.91.40.6-0.3-1.1-1.6-1.8-1.3-0.60.31.21.8

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 (21,6,7,8)
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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.