Monday, October23, 2017 L-36.com


Marine Weather and Tides
Mountain Gate, 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 7:29AMSunset 6:17PM Monday October 23, 2017 5:20 PM PDT (00:20 UTC) Moonrise 10:03AMMoonset 8:08PM Illumination 15% 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- 220 Pm Pdt Mon Oct 23 2017
Tonight..NE winds 10 kt.
Tue..NE winds 5 to 15 kt.
Tue night..W winds 10 kt.
Wed..NE winds 10 kt.
Wed night..SW winds 5 to 15 kt.
Thu..NE winds 10 kt...becoming nw.
Fri..NE winds 5 kt...becoming w.
Sat..N winds 5 kt...becoming sw.
PZZ500 220 Pm Pdt Mon Oct 23 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Generally light northwesterly winds will prevail over the coastal waters this afternoon and overnight with locally breezy conditions possible in the outer waters north of point reyes. Additionally, the northwest swell will decrease through the middle of the week, but then increase again late week as another long-period swell arrives.

7 Day Forecast for Marine Location Near Alameda, CA
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location: 37.77, -122.34     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 240001
afdmtr
area forecast discussion
national weather service san francisco bay area
501 pm pdt Mon oct 23 2017

Synopsis A rapid warming trend that got underway today will
persist into Tuesday with the potential for record to near record
breaking daytime temperatures. Temperatures cool slightly as
offshore flow and the high pressure aloft weakens by midweek, yet
temperatures look to remain above seasonal averages through late
week. In addition, ongoing dry conditions will likely persist
through the end of the month.

Discussion As of 01:45 pm pdt Monday... A strong ridge of high
pressure building in from the south and west has resulted very
warm to hot conditions across the region. Afternoon temperatures
are forecast to be around 15 to 20 deg f above seasonal averages
and will likely warm by a few more degrees on Tuesday as weak
offshore flow persists. With this type of late season heat event,
temperatures will be evenly spread from near the coast in the 80s
to 90s inland this afternoon. The warmest and driest air mass
appears to remain placed over southern california and up into the
central coast where afternoon temperatures will potentially reach
into the middle upper 90s on Tuesday afternoon. Cannot even rule
out lower 90s in and around the monterey area as well as santa
cruz. These warm temperatures may reach or exceed current record
values for the calendar date, both today and on Tuesday.

The heat will result in concerns for our more heat sensitive
populations such as the elderly, young and homeless with heat risk
levels reaching into the low to moderate category, especially across
the central coast. However, long october nights and clear skies will
allow for sufficient overnight cooling with lows generally in the 50s
for most urban areas while higher elevations only cool into the 60s
and lower 70s.

By midweek, a slight cooling trend is likely as the mid upper level
ridge retreats back out over the pacific in response to trough
digging into the great basin and central plains. While onshore flow
returns at the coast, weak offshore flow will persist inland to help
maintain temperatures that are above seasonal averages at least on
Wednesday and Thursday.

Stronger onshore flow is then anticipated late in the week into early
next week which will help cool inland areas as well. However, look
for values to remain on the warm side of normal through early next
week. Will have to watch for the return of overnight early morning
coastal clouds late in the week as the boundary layer moistens up.

Otherwise, ongoing dry weather conditions are likely to persist
through the end of the month.

Aviation As of 5:00 pm pdt Monday...VFR through the entire
period for all tafs due to an offshore flow in place. Winds will
generally be under 12 kt. High confidence.

Vicinity of ksfo...VFR through the period. Winds forecast to be
under 10 kt. High confidence.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals...VFR through the period. Stronger winds
near ksns with speeds over 10 kt possible starting after 12z. High
confidence.

Fire weather As of 5:00 pm pdt Monday... Winds are anticipated
to decrease later this afternoon and evening for the north bay and
east bay hills. Otherwise, generally light offshore wind will
continue for all other zones through tomorrow. Another hot and dry
day tomorrow, with single digit humidity values possible for
parts of monterey and san benito counties. Humidity values
increase by Wednesday. With cooler conditions slated for our
entire region by Thursday.

Marine As of 08:54 am pdt Monday... Northwest winds will
continue to gradually diminish through the day. Additionally, the
northwest swell will decrease through the middle of the week, but
then increase again late week as another long-period swell
arrives.

Mtr watches warnings advisories
Tday Sca... Pt arena to pigeon pt 10-60 nm
public forecast: rgass
aviation: bell
marine: rowe
fire weather: bam
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
OBXC1 2 mi50 min 73°F 55°F
AAMC1 - 9414750 - Alameda, CA 2 mi50 min W 2.9 G 5.1 80°F 62°F1021.4 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 2 mi50 min WNW 6 G 8
OKXC1 - 9414776 - Oakland (Berth 34), CA 3 mi50 min WNW 7 G 8.9 66°F 1020.9 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 3 mi50 min WNW 1.9 G 5.1 82°F 1020.1 hPa
LNDC1 4 mi50 min WNW 4.1 G 6 81°F 1021 hPa
PXSC1 4 mi50 min 81°F 54°F
FTPC1 - 9414290 - San Francisco, CA 7 mi50 min WSW 8 G 9.9 72°F 56°F1021.5 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 9 mi50 min W 4.1 G 5.1 79°F 1021.3 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 10 mi58 min W 2.9 79°F 1021 hPa
RCMC1 - 9414863 - Richmond, CA 11 mi50 min NW 8 G 9.9 76°F 59°F1020.8 hPa
46237 - San Francisco Bar, CA (142) 16 mi50 min 57°F8 ft
RTYC1 - 9414523 - Redwood City, CA 19 mi50 min NNW 5.1 G 5.1 82°F 64°F1020.4 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 20 mi50 min E 8 G 13 79°F 1020.6 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 22 mi50 min ENE 2.9 G 5.1 76°F 62°F1021.4 hPa54°F
PCOC1 - 9415144 - Port Chicago, CA 25 mi50 min ENE 7 G 8 75°F 63°F1021 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 26 mi90 min WNW 7.8 G 9.7 59°F 57°F9 ft1021.6 hPa (-1.8)
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 30 mi50 min SE 6 G 8 78°F 1020.9 hPa
SFXC1 - San Francisco Bay Reserve, CA 34 mi95 min E 13 83°F 1021 hPa51°F
PRYC1 - 9415020 - Point Reyes, CA 37 mi50 min E 4.1 G 5.1 55°F1021 hPa
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 40 mi90 min NNW 14 G 16 60°F 59°F11 ft1020.4 hPa (-1.9)

Wind History for Oakland Middle Harbor, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Redding Municipal Airport, CA18 mi27 minN 15 G 2110.00 miFair92°F44°F19%1022.2 hPa

Wind History from OAK (wind in knots)
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Last 24hrW6W5N3CalmCalmCalmNE3CalmNE3NE3NE4N3CalmCalmCalmCalm6NE9N8NW9N74NW6NW5
1 day agoW12NW12NW6NW4CalmSE5SE3NE4E3CalmCalmE3NE3NE4E3CalmW4W7W10W10NW10W11NW10W8
2 days agoW19W17W13W13W10CalmNW4NW5CalmNE3CalmNE3CalmCalmCalmCalmW3SW6W9W11W7W8SW7W12

Tide / Current Tables for Oakland Pier, San Francisco Bay, California
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Oakland Pier
Click for Map
Mon -- 03:37 AM PDT     4.78 feet High Tide
Mon -- 07:26 AM PDT     Sunrise
Mon -- 08:47 AM PDT     2.64 feet Low Tide
Mon -- 10:55 AM PDT     Moonrise
Mon -- 02:34 PM PDT     5.64 feet High Tide
Mon -- 06:20 PM PDT     Sunset
Mon -- 09:15 PM PDT     Moonset
Mon -- 09:28 PM PDT     0.18 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.33.44.24.74.84.43.83.22.82.62.93.64.35.15.65.65.14.231.70.80.20.30.8

Tide / Current Tables for Potrero Point 1.1 mi E, South San Francisco Bay, California Current
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Potrero Point 1.1 mi E
Click for Map
Mon -- 12:47 AM PDT     1.95 knots Max Flood
Mon -- 04:10 AM PDT     -0.00 knots Slack
Mon -- 06:28 AM PDT     -1.19 knots Max Ebb
Mon -- 07:26 AM PDT     Sunrise
Mon -- 09:37 AM PDT     0.00 knots Slack
Mon -- 10:55 AM PDT     Moonrise
Mon -- 12:34 PM PDT     1.30 knots Max Flood
Mon -- 03:20 PM PDT     -0.00 knots Slack
Mon -- 06:20 PM PDT     Sunset
Mon -- 06:39 PM PDT     -2.01 knots Max Ebb
Mon -- 09:15 PM PDT     Moonset
Mon -- 10:18 PM PDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.81.91.71.10.2-0.6-1.1-1.1-0.8-0.30.20.81.21.30.90.3-0.5-1.3-1.9-2-1.5-0.9-0.20.6

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 (20,4,5,8)
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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.