Tuesday, May23, 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 5:52AMSunset 8:19PM Monday May 22, 2017 11:47 PM PDT (06:47 UTC) Moonrise 3:01AMMoonset 3:49PM Illumination 6% Phase: Waning Crescent; Moon at 27 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- 944 Pm Pdt Mon May 22 2017
Tonight..SW winds 10 kt. Wind waves 3 ft late in the evening... Becoming 2 ft or less. NW swell 3 ft at 9 seconds. Patchy fog after midnight.
Tue..SW winds 10 kt. Wind waves 2 ft or less. NW swell 3 ft at 9 seconds. Patchy fog in the morning.
Tue night..SW winds 10 kt. Wind waves 3 ft in the evening... Becoming 2 ft or less. NW swell 3 ft at 8 seconds. Patchy fog after midnight.
Wed..S winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 3 to 4 ft at 11 seconds. Patchy fog in the morning.
Wed night..S winds 10 to 20 kt. Wind waves 2 to 4 ft. NW swell 3 to 5 ft at 11 seconds.
Thu..S winds 10 to 20 kt. Wind waves 2 to 4 ft...becoming 2 ft or less. NW swell 3 to 5 ft.
Fri..W winds 10 kt. Wind waves 2 ft or less. NW swell 3 to 5 ft.
Sat..W winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 3 to 4 ft. Patchy fog.
...san francisco bar/fourfathom bank forecast..... In the deep water channel...combined seas 2 to 3 ft with a period of 15 seconds. Across the bar...combined seas 3 to 5 ft with a period of 15 seconds. Maximum ebb current of 1.7 knots at 01:30 am Tuesday and 1.1 knots at 01:54 pm Tuesday.
PZZ500 944 Pm Pdt Mon May 22 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Surface high pressure over the eastern pacific will strengthen from tonight into Wednesday morning keeping northwesterly winds going over the outer waters. A surface ridge of high pressure over the central coast will cause winds over the inner coastal waters to be primarily light southwesterly through Tuesday. Except for the Monterey bay onshore winds will be gusty over the bays each afternoon and evening at least through mid-week.

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 230528
afdmtr
area forecast discussion
national weather service san francisco bay area
1028 pm pdt Mon may 22 2017

Synopsis Look for cooler conditions through most of the week as
a onshore flow combines with the marine layer. Minor warming is
then expected during the upcoming weekend especially for inland
locations.

Discussion As of 9:00 pm pdt Monday... No forecast updates
planned for this evening with about a 1500 foot marine layer in
place along the immediate coast. Low clouds making their way
through the golden gate and into the berkeley hill as well as
spreading inland around the monterey bay region. Inland areas that
reached the 90s today will see more significant cooling for
Tuesday as onshore flow continues to increase with a deepening
marine layer in response to upper troughing aloft.

All available MOS data suggests continued cooling trend through
midweek for inland areas with robust onshore winds in place and
likely persistent stratus around the coast and bays. The trend
will be for near or below normal temperatures for much of the rest
of the work week.

Looking ahead to the long holiday weekend, long range models
suggest a seasonable weather pattern with dry and near normal
temps.

Prev discussion As of 1:15 pm pdt Monday... As expected temperatures
are running cooler for all locations away from the coast today
with many spots 5 to 12 degrees less than values from Sunday.

Current readings show a wide range from 50s and 60s to parts of
the coast with 70s and 80s inland. Still a few hours of heating,
so would expect the warmest inland spots to again get into the
90s, however the number of locations should be less than
yesterday. Satellite shows widespread clouds along the water and
with the minor onshore flow expected to continue, likely that many
of the local beaches will see little to no sunshine today.

Tonight will be a near repeat of last night with patchy fog along
the coast and to some inland spots. Lows will mostly be in the 50s
with 60s above 1500 feet.

Synoptically the ridge of high pressure in charge will begin to
flatten out through the week as a system dives down from canada
and works into the northern rockies. 500 mb heights will drop from
587 dm today to 573 dm by Thursday. Inland locations that have
been in the 90s the past few days will drop back into the upper
60s to the lower 70s. Closer to the coast widespread mid 50s to
mid 60s can be expected. With the onshore flow in place, much of
the week could by quite grey at the coast.

Longer range guidance shows the ridge trying to rebuild by the
weekend although heights will be less than the past few days. By
Sunday inland spots will be back in the mid 70s to mid 80s away
from the coast with 60s to mid 70s near the water.

Aviation As of 10:27 pm pdt Monday... Stratus and fog are
heavily blanketing the immediate coast with some stratus and fog
reaching through the golden gate this evening; ifr CIGS and vsbys
are forecast to continue in these areas tonight and Tuesday morning.

The marine layer depth ranges from approx 1,000 feet bay area to
1,500 north central coast. 925 mb temperatures remain nearly
unchanged over the bay area and cool less than 1c over the central
coast tonight thus the marine layer depth should remain nearly
unchanged overnight, possibly including Tuesday as well.

Gusty onshore winds are likely over the san francisco bays Tuesday
afternoon and evening, similarly gusty winds are expected again
Wednesday. Lower level cooling will become more robust by this
time Tuesday evening through Wednesday thus the marine layer depth
should increase and stratus and fog intrusion should then really
get underway.

A little more than moderate confidenceVFR persists for most of the
bay area terminals tonight with exception of southerly flow bringing
lifr/vlifr CIGS and vsbys to ksts late tonight and Tuesday morning.

For monterey bay area ifr/lifr will continue into Tuesday morning.

Vicinity of ksfo...VFR. W-nw winds 5-10 knots tonight, becoming gusty
from the w-nw Tuesday afternoon and evening.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... Ifr/lifr prevails tonight into late Tuesday
morning.VFR returns late Tuesday morning and afternoon, onshore winds
will likely bring stratus and fog back in Tuesday evening.

Marine As of 9:45 pm pdt Monday... Surface high pressure over
the eastern pacific will strengthen from tonight into Wednesday
morning keeping northwesterly winds going over the outer waters. A
surface ridge of high pressure over the central coast will cause
winds over the inner coastal waters to be primarily light
southwesterly through Tuesday. Except for the monterey bay onshore
winds will be gusty over the bays each afternoon and evening at
least through mid-week.

Mtr watches/warnings/advisories
Tngt None.

Public forecast: rww
aviation/marine: canepa
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RTYC1 - 9414523 - Redwood City, CA 8 mi48 min NNW 6 G 7 58°F 70°F1014.2 hPa (+1.2)
AAMC1 - 9414750 - Alameda, CA 23 mi48 min W 2.9 G 5.1 56°F 63°F1015.3 hPa (+0.8)
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 25 mi48 min WSW 1.9 G 2.9
OBXC1 25 mi48 min 55°F 54°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 25 mi48 min W 4.1 G 6 53°F 1014 hPa (+1.0)
PXSC1 25 mi48 min 53°F 53°F
LNDC1 25 mi54 min WSW 4.1 G 5.1 56°F 1014.9 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 26 mi48 min W 2.9 G 2.9 54°F 1014.9 hPa (+0.9)
FTPC1 - 9414290 - San Francisco, CA 26 mi48 min W 1.9 G 5.1 52°F 53°F1015.3 hPa (+0.8)
46237 - San Francisco Bar, CA (142) 29 mi48 min 54°F3 ft
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 29 mi58 min WSW 3.9 G 5.8 51°F 55°F4 ft1014.9 hPa (+0.3)
TIBC1 - Tiburon Pier, San Francisco Bay, CA 32 mi56 min S 1.9 55°F 1014 hPa (+0.0)
PPXC1 - 9414847 - Richmond (Point Potrero), CA 32 mi48 min S 17 G 20 54°F 1014.7 hPa (+0.7)
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 34 mi58 min SW 3.9 G 5.8 50°F 54°F4 ft1015.2 hPa (+0.3)
RCMC1 - 9414863 - Richmond, CA 34 mi48 min S 7 G 9.9 56°F 58°F1014.2 hPa (+0.8)
UPBC1 43 mi48 min WNW 9.9 G 14
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 43 mi48 min W 8 G 8.9 60°F 1013.6 hPa (+0.9)
MZXC1 - 9415102 - Martinez-Amorco CA 43 mi48 min WNW 9.9 G 13 63°F 65°F1013.8 hPa (+1.1)57°F
46042 - MONTEREY - 27NM West of Monterey Bay, CA 45 mi58 min 54°F 55°F5 ft1015.2 hPa (+0.0)
PCOC1 - 9415144 - Port Chicago, CA 45 mi48 min WSW 9.9 G 13 64°F 66°F1013.3 hPa (+1.3)
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 48 mi48 min WNW 12 G 15 70°F 1012.5 hPa (+0.9)

Wind History for Redwood City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Carlos Airport, CA8 mi58 minN 410.00 miFair59°F53°F82%1014.9 hPa
Half Moon Bay Airport, CA10 mi53 minS 40.75 miFog/Mist54°F51°F94%1015.6 hPa
San Francisco, San Francisco International Airport, CA12 mi52 minWNW 1010.00 miA Few Clouds55°F51°F87%1014.7 hPa
Palo Alto Airport, CA12 mi3 hrsNW 910.00 miClear61°F57°F88%1013.9 hPa
Mountain View, Moffett Field, CA15 mi52 minNNW 310.00 miFair60°F55°F84%1015.1 hPa
Oakland, Metro Oakland International Airport, CA19 mi55 minNW 810.00 miPartly Cloudy57°F53°F87%1014.9 hPa
Hayward, Hayward Air Terminal, CA19 mi54 minNW 610.00 miFair58°F48°F72%1015.5 hPa
San Jose, San Jose International Airport, CA22 mi55 minW 510.00 miMostly Cloudy62°F55°F80%1014.5 hPa

Wind History from SQL (wind in knots)
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Last 24hrN4N3CalmNW4CalmNW5NW3CalmNE444N6NW8--N7NW9N9N9N8NW8NW8N6NW3N4
1 day agoNW5CalmNW3CalmCalmCalmNW33N4NE5NE6N4N5N7N10N9N8NW10NW9N8N7N6NW4N3
2 days agoCalmCalmCalmNW3NW3CalmCalmCalmCalmNE4NE4--N6N9N7NW8W10
G16
W10W7N5N3NW4CalmN3

Tide / Current Tables for Smith Slough, San Francisco Bay, California
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Smith Slough
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Tue -- 04:38 AM PDT     Moonrise
Tue -- 05:53 AM PDT     Sunrise
Tue -- 06:11 AM PDT     -0.15 feet Low Tide
Tue -- 12:06 PM PDT     6.69 feet High Tide
Tue -- 05:57 PM PDT     1.19 feet Low Tide
Tue -- 05:58 PM PDT     Moonset
Tue -- 08:18 PM PDT     Sunset
Tue -- 11:45 PM PDT     8.39 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
7.86.75.13.31.60.4-0.10.21.434.76.16.76.45.442.61.51.21.83.256.88.1

Tide / Current Tables for San Mateo Bridge, South San Francisco Bay, California Current
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San Mateo Bridge
Click for Map
Tue -- 03:06 AM PDT     -1.90 knots Max Ebb
Tue -- 04:38 AM PDT     Moonrise
Tue -- 05:53 AM PDT     Sunrise
Tue -- 06:25 AM PDT     0.01 knots Slack
Tue -- 09:10 AM PDT     1.92 knots Max Flood
Tue -- 12:39 PM PDT     -0.01 knots Slack
Tue -- 03:31 PM PDT     -1.39 knots Max Ebb
Tue -- 05:58 PM PDT     Moonset
Tue -- 06:22 PM PDT     0.01 knots Slack
Tue -- 08:18 PM PDT     Sunset
Tue -- 09:08 PM PDT     1.84 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.2-1-1.6-1.9-1.7-1.1-0.40.61.51.91.81.40.6-0.3-1-1.3-1.3-0.9-0.30.61.41.81.71.2

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 (2,6,7,8)
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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.