Monday, January22, 2018 L-36.com


Marine Weather and Tides
Mountain View, 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 7:16AMSunset 5:24PM Monday January 22, 2018 2:11 AM PST (10:11 UTC) Moonrise 10:34AMMoonset 10:55PM Illumination 31% Phase: Waxing Crescent; Moon at 6 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- 839 Pm Pst Sun Jan 21 2018
Tonight..S winds 10 to 20 kt. Rain likely.
Mon..SE winds 10 to 20 kt...becoming east 10 kt in the afternoon. Chance of showers in the morning.
Mon night..NE winds 5 to 15 kt.
Tue..NE winds 10 kt.
Tue night..E winds 10 kt.
Wed..SW winds 15 to 25 kt. Rain likely.
Thu..W winds 10 kt. Chance of showers, then slight chance of showers.
Fri..N winds 5 kt.
PZZ500 839 Pm Pst Sun Jan 21 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... South winds will increase ahead of an approaching cold front. The cold front is forecast to pass through Monday morning and winds will switch to northwest. Small craft advisories are in place for most coastal water zones mainly due to squared and hazardous seas over the next couple of days. A new northwest swell train arrives by this evening.

7 Day Forecast for Marine Location Near Mountain View, CA
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location: 37.45, -122.06     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 220635
afdmtr
area forecast discussion
national weather service san francisco bay area
1035 pm pst Sun jan 21 2018

Synopsis Rain will continue to spread across the san francisco
bay area overnight, with highest rainfall amounts expected in the
north bay. Light rain may develop as far south as the monterey bay
area by late tonight. Rain will taper off and end on Monday. Dry
and mild weather is forecast for Tuesday. The next system is
forecast to bring soaking rains and locally gusty winds to the
entire region on Wednesday. Scattered showers will follow into
Thursday, with dry weather expected by Friday and into next
weekend.

Discussion As of 9:05 pm pst Sunday... A frontal boundary is
sagging slowly southward through northern california this evening.

Rainfall thus far has been almost entirely confined to the north
bay, with most locations so far picking up a quarter of an inch
of less. The exception is venado in northwest sonoma county where
nearly 1.5 inches has accumulated since late afternoon.

Latest hrrr and WRF models indicate that rain will gradually
spread as far south as santa cruz and santa clara counties
overnight, with the WRF also forecasting light rain to develop
into northern monterey and san benito counties on Monday morning.

Both models indicate that the most substantial rainfall will be
confined to the north bay where rain totals of up to 2 inches are
forecast by Monday morning in the mountains of western sonoma and
marin counties. Rainfall amounts through Monday morning from san
francisco and oakland southward are generally forecast to be a
half inch or less, except along portions of the san francisco
peninsula where the WRF forecasts up to an inch of rain. Rain
rates overnight are expected to mostly be light to moderate,
except in the north bay where brief periods of heavy rain are
forecast to occur, particularly along the western slopes of the
coastal mountains in sonoma and marin counties.

Across the burn scars in sonoma and napa counties, the latest wrf
and hrrr models forecast maximum rain rates of about a quarter
inch per hour. Rain rates are expected to peak across the burn
scars between about midnight and 4 am. Rain totals across the burn
scar areas by Monday morning are projected to be anywhere form a
half inch to an inch and a quarter. Rainfall will mostly end in
the north bay by sunrise Monday. Father south, periods of rain
will persist through the morning with a few isolated showers
possibly lingering into the afternoon hours. Most of our forecast
area should see dry weather return by Monday afternoon.

Dry and mild weather is then forecast to persist through Tuesday
and Tuesday night as a shortwave ridge temporarily develops over
california.

The models have been consistent in bringing a relatively robust
system through our area on Wednesday, forecasting a strong cold
front to sweep across our entire forecast area, starting in the
north bay around sunrise Wednesday and reaching the southern end
of our area by Wednesday evening. This midweek system will
generate more uniform rainfall distribution across our area
compared to the current system. Also, a period of heavy rain is
likely just ahead of and along the cold front. But since the
Wednesday system is forecast to move through quickly, overall rain
totals are not expected to exceed 2 inches. Most areas are
currently projected to pick up between 0.5 and 1.5 inches. In
addition, locally gusty southerly winds are expected prior to cold
frontal passage on Wednesday. Scattered showers will likely
continue into Thursday.

A recent forecast update included lowering of rainfall chances
across the southern portion of our area on Wednesday morning.

Longer range models forecast dry weather returning by late next
week and continuing through next weekend as a longwave ridge
develops across the west.

Aviation As of 10:30 pm pst Sunday... Lower CIGS and brief
light rain are moving into the sfo bay area and will reach the mry
bay area after 12z. Deep moisture extending from the surface to
near 500 mb will start to become shallower Monday morning with
rain decreasing. However plenty of low-level moisture remain which
will keep mainly MVFR conditions through Monday afternoon.

Vicinity of ksfo... MVFR cigs. Light rain with vsbys down to 4-6
miles. Conditions improving after 18z becomingVFR after 22z.

Southeast winds 5-10 kt becoming west after 18z.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... MVFR by 12z as the tail end of a weak
frontal system approaches. Some light rain from 12z-18z.

Marine As of 10:23 pm pst Sunday... South winds will increase
ahead of an approaching cold front. The cold front is forecast
to pass through Monday morning and winds will switch to
northwest. Small craft advisories are in place for most coastal
water zones mainly due to squared and hazardous seas over the
next couple of days. A new northwest swell train arrives by this
evening.

Mtr watches warnings advisories
Tngt Sca... Pt reyes to pigeon pt 0-10 nm
sca... Pigeon pt to pt pinos 0-10 nm
sca... Pt arena to pt reyes 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... Mry bay from 4 am
public forecast: dykema
aviation: W pi
marine: W pi
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RTYC1 - 9414523 - Redwood City, CA 9 mi41 min SE 4.1 G 6 53°F 54°F1027.2 hPa
AAMC1 - 9414750 - Alameda, CA 26 mi41 min ESE 11 G 13 51°F 54°F1026.4 hPa
LNDC1 27 mi41 min ESE 4.1 G 8.9 51°F 1026.3 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 28 mi41 min SE 8.9 G 11
OKXC1 - 9414776 - Oakland (Berth 34), CA 29 mi41 min SE 7 G 12 50°F 1026.3 hPa
OBXC1 29 mi41 min 51°F 51°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 30 mi41 min SE 8.9 G 14 53°F 1025.1 hPa
PXSC1 30 mi41 min 54°F 54°F
FTPC1 - 9414290 - San Francisco, CA 33 mi41 min S 7 G 12 54°F 54°F1026.1 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 35 mi41 min SE 14 G 19 53°F 1026.2 hPa
RCMC1 - 9414863 - Richmond, CA 38 mi41 min SSE 9.9 G 14 52°F 53°F1025.6 hPa
46237 - San Francisco Bar, CA (142) 38 mi41 min 53°F11 ft
MZXC1 - 9415102 - Martinez-Amorco CA 41 mi41 min SSE 9.9 G 12 52°F 52°F1026.2 hPa52°F
PCOC1 - 9415144 - Port Chicago, CA 42 mi41 min S 8.9 G 12 52°F 51°F1026 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 42 mi41 min SE 8 G 9.9 52°F 1026.1 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 43 mi41 min SSW 12 G 19 54°F 1025.3 hPa
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 44 mi81 min S 16 G 19 56°F 56°F14 ft1026 hPa (-0.6)
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 46 mi81 min S 16 G 19 55°F 54°F13 ft1025.7 hPa (-0.7)
ELXC1 - Elkhorn Slough Reserve, CA 47 mi86 min ENE 1 47°F 1028 hPa45°F
46092 - MBM1 48 mi56 min E 5.8 54°F 56°F1027.8 hPa (-0.6)
46042 - MONTEREY - 27NM West of Monterey Bay, CA 49 mi81 min SSE 7.8 G 12 55°F 56°F14 ft1027.6 hPa (-0.5)

Wind History for Redwood City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Mountain View, Moffett Field, CA1 mi75 minSE 69.00 miLight Rain51°F44°F77%1027.7 hPa
San Jose, San Jose International Airport, CA9 mi78 minESE 1010.00 miOvercast53°F43°F69%1027.4 hPa
San Carlos Airport, CA11 mi76 minSSE 810.00 miOvercast54°F48°F82%1027.1 hPa
Hayward, Hayward Air Terminal, CA15 mi77 minSSE 89.00 miLight Rain51°F43°F74%1027.9 hPa
San Jose / Reid / Hillv, CA15 mi4.4 hrsN 010.00 miMostly Cloudy50°F42°F76%1027.4 hPa
Oakland, Metro Oakland International Airport, CA19 mi78 minSE 99.00 miLight Rain50°F48°F93%1026.7 hPa
San Francisco, San Francisco International Airport, CA20 mi75 minS 89.00 miLight Rain54°F48°F80%1026.5 hPa
Livermore, Livermore Municipal Airport, CA21 mi78 minN 010.00 miOvercast49°F44°F83%1026.8 hPa

Wind History from NUQ (wind in knots)
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Last 24hrCalmCalmCalmCalmCalmCalmSE3SE53E5N7N6NE5NE3CalmCalmSE3SE4SE3S4SE6SE7SE6SE7
1 day agoCalmCalmCalmCalmCalmCalmCalmCalmNE6N6N7N5N8N7NW7W5W5W5CalmS3CalmCalmCalmSE3
2 days agoCalmS3CalmCalmCalmCalmCalmCalmN5N5N106W6NW8NW6NW5W4W3W5W4W3W3W3W4

Tide / Current Tables for Calaveras Point, west of, San Francisco Bay, California
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Calaveras Point
Click for Map
Mon -- 04:24 AM PST     8.00 feet High Tide
Mon -- 07:18 AM PST     Sunrise
Mon -- 10:34 AM PST     Moonrise
Mon -- 10:39 AM PST     2.55 feet Low Tide
Mon -- 03:45 PM PST     7.46 feet High Tide
Mon -- 05:21 PM PST     Sunset
Mon -- 10:41 PM PST     0.92 feet Low Tide
Mon -- 10:55 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.345.77.17.97.97.15.94.53.32.72.63.44.76.17.27.476.14.73.21.91.11

Tide / Current Tables for Dumbarton Point 2.3 mi NE, South San Francisco Bay, California Current
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Dumbarton Point 2.3 mi NE
Click for Map
Mon -- 01:22 AM PST     1.20 knots Max Flood
Mon -- 04:47 AM PST     -0.00 knots Slack
Mon -- 07:18 AM PST     Sunrise
Mon -- 08:50 AM PST     -0.84 knots Max Ebb
Mon -- 10:34 AM PST     Moonrise
Mon -- 11:08 AM PST     0.00 knots Slack
Mon -- 01:35 PM PST     0.79 knots Max Flood
Mon -- 04:23 PM PST     -0.00 knots Slack
Mon -- 05:21 PM PST     Sunset
Mon -- 09:01 PM PST     -0.99 knots Max Ebb
Mon -- 10:55 PM PST     Moonset
Mon -- 11:11 PM PST     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.81.21.10.90.4-0.1-0.4-0.6-0.8-0.8-0.5-0.10.40.70.80.50.2-0.2-0.4-0.7-0.9-1-0.7-0.1

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 (5,6,7,8)
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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.