Monday, August21, 2017 L-36.com


Marine Weather and Tides
Emerald Lake Hills, CA

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
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.

Sunrise 6:29AMSunset 7:53PM Monday August 21, 2017 8:48 AM PDT (15:48 UTC) Moonrise 5:22AMMoonset 7:05PM Illumination 0% Phase: New Moon; Moon at 29 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- 232 Am Pdt Mon Aug 21 2017
Today..SW winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 3 to 5 ft at 10 seconds. Patchy fog in the morning.
Tonight..SW winds 10 kt. Wind waves 2 ft or less. NW swell 3 to 4 ft at 9 seconds. Patchy fog after midnight.
Tue..W winds 10 kt. Wind waves 2 ft or less. NW swell 3 to 4 ft at 9 seconds. Patchy fog in the morning.
Tue night..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 3 ft at 9 seconds.
Wed..W winds 5 to 15 kt. Wind waves 1 to 3 ft. W swell 3 ft at 12 seconds.
Thu..W winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 3 to 5 ft...increasing to 4 to 6 ft.
Fri..W winds 10 to 20 kt. Wind waves 2 to 4 ft. NW swell 4 to 6 ft.
...san francisco bar/fourfathom bank forecast..... In the deep water channel...combined seas 4 to 5 ft with a dominant swell period of 10 seconds. Across the bar...combined seas 4 to 6 ft with a dominant swell period of 10 seconds. Maximum ebb current of 1.9 knots at 02:48 am Monday and 1.2 knots at 04:00 pm Monday.
PZZ500 232 Am Pdt Mon Aug 21 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Light and variable winds will prevail over the coastal waters through about mid week, with the exception of the northern san francisco bay zone, which will be breezy during the afternoon and evening hours. As a result, seas are anticipated to remain relatively tame, occasionally choppy. High pressure builds in from the west by Wednesday, increasing winds from the northwest.

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 211545
afdmtr
area forecast discussion
national weather service san francisco bay area
845 am pdt Mon aug 21 2017

Synopsis Look for overnight clouds at the coast and adjacent
inland spots through most of the period. Temperatures will begin
to warm again later in the week as a ridge of high pressure starts
to build into our region.

Discussion As of 08:41 am pdt Monday... Deep marine layer
remains in place over the region this morning with low clouds
holding on strong over most valley locations and along the coast.

This cloud cover should begin to scatter out late morning over the
valleys and by early afternoon closer to the coast. However,
cannot rule out some coastal locations remaining under cloud cover
through much of the day. Have removed mention of fog from the
forecast this morning given current observations and state of the
stratus deck. Otherwise, the forecast remains on track. Please see
the forecast discussion below for additional details.

Prev discussion As of 3:00 am pdt Monday... Over the past few
hours we have seen a substantial increase in clouds across a good
portion of our cwa. Unlike most days when other weather parameters
are the focus, clouds are the main story today as many people
will be trying to view (don't forget the proper eyewear!) the
solar eclipse this morning. Unfortunately, guidance has become a
bit more pessimistic with the last couple of runs and now shows a
better shot of clouds impacting portions of the san francisco bay
region. For those looking to view it, advice remains the same --
head well inland for your best shot. Please see the "eclipse"
section below for specific viewing times.

Outside of the eclipse, quiet weather will be the rule for the
entire week. Temperatures will be seasonably cool inland today
into Wednesday as an upper level low and shortwave trough remain
near our cwa. Instead of seeing a typical 40 degree gradient, we
will generally see half of that. Coastal spots will be in the 60s
to mid 70s with mid 70s to around 90 inland.

Toward the end of the week temperatures will begin to increase
(especially away from the coast) as a ridge of high pressure
centered near the four corners builds into california. Highs will
move back to above normal levels with vary warm conditions likely
next weekend.

Aviation As of 4:57 am pdt Monday... For 12z tafs. Mid-level
and surface low pressure about 100 miles off the coast of southern
california will tamper with the typical wind pattern across the
district a tad today. Otherwise, stratus quo will continue through
mid to late morning. Satellite shows extensive stratus filling in
nicely at this hour, under a 2400 foot marine layer. All taf
sites show MVFR ifr CIGS per 11z surface observations, minus ksfo
atVFR. Expect CIGS to continue through 16-17z before clearing
occurs. Mid-level moisture from aforementioned low will bring in
sct-bkn around 10-15k feet through the day. Light and variable
winds will turn westerly at 10 to 15 kt this afternoon. Stratus
and fog is expected to redevelop tonight.

Vicinity of ksfo... Stratus expected to fill in over the next hour
or so over the terminal. MVFR expected through about 16z, then
vfr. Will amend timing if necessary. Southwest winds will turn
westerly and increase by 18-19z, though only expected to remain
around 15 kt this afternoon.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... MVFR ifr through 17-18z, with low
confidence on exact clearing. Generally light onshore winds this
afternoon, around 10-12 kt, with winds being more southwesterly at
kmry. An early return of stratus expected again tonight.

Eclipse Here are the times for the start, peak, and end of the
eclipse for Monday morning. The percent of obscuration for each
location is also listed.

Santa rosa... San francisco... Oakland... San jose... Monterey

Start... 9:01... ... ... .9:01... ... ... 9:02... ... 9:02... ... .9:02..

Peak... 10:15... ... ... 10:15... ... ..10:15... ..10:16... ... 10:16..

End... .11:37... ... ... 11:37... ... ..11:37... ..11:38... ... 11:38..

Obscur... 78%... ... ... ..76%... ... ... .76%... ... .74%... ... ..71%...

Marine As of 2:32 am pdt Monday... Light and variable winds
will prevail over the coastal waters through about mid week, with
the exception of the northern san francisco bay zone, which will
be breezy during the afternoon and evening hours. As a result,
seas are anticipated to remain relatively tame, occasionally
choppy. High pressure builds in from the west by Wednesday,
increasing winds from the northwest.

Mtr watches warnings advisories
Tday Sca... Sf bay from 1 pm
public forecast: rgass bell
aviation: bam
marine: bam
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 SSW 1.9 G 4.1 65°F 73°F1015.2 hPa (+1.8)
AAMC1 - 9414750 - Alameda, CA 23 mi48 min W 5.1 G 8.9 63°F 68°F1016.2 hPa (+1.6)
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 25 mi48 min WSW 12 G 15
PXSC1 25 mi48 min 63°F 60°F
LNDC1 25 mi48 min W 7 G 9.9 63°F 1015.7 hPa (+1.6)
PXOC1 - 9414311 - San Francisco (Pier 1), CA 25 mi54 min WNW 1.9 G 5.1 62°F 1014.8 hPa
OBXC1 25 mi48 min 63°F 60°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 26 mi48 min W 8.9 G 12 63°F 1015.8 hPa (+1.6)
FTPC1 - 9414290 - San Francisco, CA 26 mi48 min WSW 4.1 G 8 61°F 63°F1016.3 hPa (+1.8)
46237 - San Francisco Bar, CA (142) 29 mi48 min 61°F3 ft
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 29 mi58 min S 7.8 G 9.7 62°F 62°F5 ft1015.2 hPa (+1.4)
TIBC1 - Tiburon Pier, San Francisco Bay, CA 32 mi61 min NNE 4.1 61°F 1016 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 32 mi48 min SW 12 G 15 63°F 1016.1 hPa (+1.7)
RCMC1 - 9414863 - Richmond, CA 34 mi48 min SSW 1.9 G 8.9 62°F 64°F1015.9 hPa (+1.8)
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 34 mi58 min SSE 1.9 G 3.9 60°F 59°F3 ft1015.9 hPa (+1.5)
MZXC1 - 9415102 - Martinez-Amorco CA 43 mi48 min W 16 G 19 62°F 68°F1015.6 hPa (+1.7)61°F
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 43 mi48 min W 12 G 16 63°F 1015.4 hPa (+1.7)
46042 - MONTEREY - 27NM West of Monterey Bay, CA 45 mi58 min SSE 5.8 G 7.8 61°F 61°F6 ft1016.1 hPa (+1.5)
PCOC1 - 9415144 - Port Chicago, CA 45 mi48 min WSW 19 G 22 62°F 68°F1015.1 hPa (+1.8)
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 48 mi48 min WNW 16 G 23 64°F 1013.9 hPa (+1.2)

Wind History for Redwood City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Carlos Airport, CA8 mi61 minW 37.00 miOvercast with Haze64°F57°F78%1015.9 hPa
Half Moon Bay Airport, CA10 mi53 minS 99.00 miOvercast63°F0°F%1015.2 hPa
San Francisco, San Francisco International Airport, CA12 mi52 minSSW 1010.00 miMostly Cloudy61°F57°F87%1015.5 hPa
Palo Alto Airport, CA12 mi61 minVar 510.00 miOvercast66°F59°F78%1015.6 hPa
Mountain View, Moffett Field, CA15 mi52 minSE 410.00 miOvercast66°F59°F78%1016.2 hPa
Oakland, Metro Oakland International Airport, CA19 mi55 minW 810.00 miOvercast63°F59°F87%1015.6 hPa
Hayward, Hayward Air Terminal, CA19 mi54 minWNW 710.00 miOvercast64°F55°F75%1016.4 hPa
San Jose, San Jose International Airport, CA22 mi55 minESE 88.00 miOvercast66°F59°F78%1015.6 hPa

Wind History from SQL (wind in knots)
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Last 24hrCalm466N9N10
G16
NW7W8W8W10W1034W5W3W5NW4W4W4NW3W3NW4W3W3
1 day agoNW5W5W6NW6NW93W11W9W8W5W7W5W3NW4W4W3W3CalmCalmCalmCalmNW3CalmCalm
2 days agoNE3N54N7N9N10N12W10NW7NW9NW9NW6N5NW6W3NW3NW4CalmCalmCalmCalmCalmNE4NW3

Tide / Current Tables for Smith Slough, San Francisco Bay, California
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Smith Slough
Click for Map
Mon -- 12:28 AM PDT     8.87 feet High Tide
Mon -- 06:21 AM PDT     Moonrise
Mon -- 06:30 AM PDT     Sunrise
Mon -- 07:43 AM PDT     -0.71 feet Low Tide
Mon -- 11:31 AM PDT     New Moon
Mon -- 01:59 PM PDT     7.67 feet High Tide
Mon -- 07:46 PM PDT     1.82 feet Low Tide
Mon -- 07:52 PM PDT     Sunset
Mon -- 08:04 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
8.78.87.96.34.22.10.5-0.5-0.70.11.73.65.57.17.77.264.532.11.92.64.26.1

Tide / Current Tables for San Mateo Bridge, South San Francisco Bay, California Current
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San Mateo Bridge
Click for Map
Mon -- 01:09 AM PDT     -0.01 knots Slack
Mon -- 04:41 AM PDT     -2.13 knots Max Ebb
Mon -- 06:21 AM PDT     Moonrise
Mon -- 06:30 AM PDT     Sunrise
Mon -- 08:02 AM PDT     0.00 knots Slack
Mon -- 10:55 AM PDT     2.21 knots Max Flood
Mon -- 11:31 AM PDT     New Moon
Mon -- 02:21 PM PDT     -0.00 knots Slack
Mon -- 05:14 PM PDT     -1.35 knots Max Ebb
Mon -- 07:53 PM PDT     Sunset
Mon -- 08:04 PM PDT     Moonset
Mon -- 08:04 PM PDT     0.00 knots Slack
Mon -- 10:48 PM PDT     1.85 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
10.2-0.8-1.6-2-2.1-1.8-1.1-01.222.221.40.4-0.5-1.1-1.3-1.2-0.8-0.10.91.71.8

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 (11,2,3,4)
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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.