Tuesday, January16, 2018 L-36.com


Marine Weather and Tides
Loyola, 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 7:18AMSunset 5:17PM Tuesday January 16, 2018 5:26 PM PST (01:26 UTC) Moonrise 6:59AMMoonset 5:13PM Illumination 0% Phase: New Moon; Moon at 0 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
    EDIT      (on/off)   Help
PZZ560 Pigeon Point To Point Pinos To 10 Nm- 255 Pm Pst Tue Jan 16 2018
Tonight..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. W swell 11 to 13 ft at 15 seconds.
Wed..W winds 10 kt. Wind waves 2 ft or less. W swell 9 to 11 ft at 15 seconds.
Wed night..NW winds 5 to 15 kt...becoming east after midnight. Wind waves 1 to 3 ft. W swell 7 to 9 ft at 14 seconds.
Thu..S winds 10 to 20 kt. Wind waves 2 to 4 ft. W swell 12 to 15 ft at 21 seconds. Chance of rain.
Thu night..W winds 10 to 20 kt. Wind waves 2 to 4 ft. W swell 16 to 19 ft at 18 seconds. Chance of showers.
Fri..NW winds 20 to 30 kt. Wind waves 5 to 7 ft. W swell 14 to 16 ft. Chance of showers, then slight chance of showers.
Sat..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. W swell 13 to 15 ft...decreasing to 11 to 14 ft.
Sun..SE winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 9 to 11 ft. Chance of rain, then rain likely.
PZZ500 255 Pm Pst Tue Jan 16 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Northerly winds will prevail tonight as high pressure remains off the coast. Southerly winds will develop late tonight and Wednesday as a low pressure system develops off the british columbia coast. Large swells will impact the beaches through early tonight before decreasing. A larger swell with long period will arrive Thursday.

7 Day Forecast for Marine Location Near Loyola, CA
   Hourly   EDIT   Help
location: 37.29, -122.14     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus66 kmtr 162152
afdmtr
area forecast discussion
national weather service san francisco bay area
152 pm pst Tue jan 16 2018

Synopsis Mostly cloudy and mainly dry conditions are forecast to
persist into Wednesday ahead of our next approaching storm system.

This system will bring rain to the region late Wednesday into
Thursday with lingering post frontal showers. Cooler temperatures
are forecast over the weekend with dry weather for much of the
region before another system arrives late Sunday or Monday.

Discussion As of 01:52 pm pst Tuesday... Light rain continues
to be reported over the north bay this afternoon, generally only a
few hundredths of an inch per hour. Otherwise, cloudy skies
prevail region-wide in wake of a weak system that pushed through
during the past 24 hours. Generally dry conditions will prevail
tonight with any precipitation forecast to stay north of the
region. Little change is anticipated for Wednesday with much of
the region dry and temperatures in the upper 50s across the
northern half of the region while lower 70s are possible for
interior portions of the central coast.

Light rain will develop late Wednesday over the north bay as another
weak system approaches from the north. This system does appear to
produce a bit more precipitation than the one that moved through
last night today. However, it too will be quick moving and result in
rainfall amounts of 1 3" to 1 5" for the north bay with isolated
amounts near 1.00" in the coastal ranges of that region. To the
south, most urban areas will see less than 1 3" with even less than
1 4" for the monterey bay region and inland valleys. Coastal ranges
along the central coast can expect around 1 4" to 1 3" with isolated
amounts up to 1 2" through Thursday. Post frontal showers are then
expected late Thursday into Friday as a more unstable and colder air
mass advects southward into the region. At this point, snow levels
are forecast to drop to or below 3,500 feet with light snow
accumulation possible in the highest peaks across the region. Also
cannot rule out a thunderstorm or two over the northern coastal
waters Thursday night into Friday.

With the colder air mass in place, overnight morning temperatures
are likely to fall into the 30s and lower 40s for most urban areas.

While widespread freezing conditions are unlikely, these conditions
may impact pets and vulnerable populations. Mostly dry conditions
expected for Saturday outside of light rain possible across the
north bay ahead of our next storm system.

There continues to be difference and inconsistencies in the medium
range forecast models with respect to the next system due to arrive
Sunday into Monday. The latest ECMWF has trended much drier with a
more progressive system sweeping through. The GFS remains a bit
wetter, yet too moves the system through from north to south Sunday
night into Monday. The canadian solution stalls the system over
northern california Sunday night into Monday before dropping
southward and weakening on Tuesday. Thus, will keep rain chances in
the extended with low confidence on details at this time.

Aviation As of 9:40 am pst Tuesday... Wide range of cat this
morning with ample low level moisture and passing showers - lifr
toVFR. Given recent trends, webcams and satellite decided to keep
more pessimistic forecast through this afternoon. Some of the
guidance keeps it an all day low cig event. Conf is low. Even if
there is some lifting later, CIGS and some br hz will likely
return tonight.

Overall conf is low to medium.

Vicinity of ksfo... MVFR CIGS through 20z with poss vsby at 5-6sm.

Cigs return tonight with some vsby again.

Sfo bridge approach... Same as ksfo.

Monterey bay terminals... Lingering fog around sns through 18-19z.

Will bring CIGS back tonight, but conf is low.

Marine As of 09:39 am pst Tuesday... Light to moderate winds
will prevail today as high pressure remains off the coast. Winds
will switch southerly late tonight and Wednesday as a low pressure
system develops off the british columbia coast and pushes the
high south. Large swells will impact the beaches through early
tonight before decreasing. A larger swell with long period will
arrive Thursday.

Mtr watches warnings advisories
Tngt Sca... Rough bar advisory for sf bar until 9 pm
public forecast: rgass
aviation: mm
marine: mm
visit us at

Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RTYC1 - 9414523 - Redwood City, CA 15 mi38 min NW 5.1 G 6 58°F 55°F1022.7 hPa
AAMC1 - 9414750 - Alameda, CA 34 mi38 min WNW 2.9 G 4.1 57°F 55°F1022.6 hPa
LNDC1 36 mi38 min NW 4.1 G 5.1 58°F 1022.5 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 37 mi38 min NW 5.1 G 7 55°F 1022.7 hPa
OBXC1 37 mi38 min 55°F 55°F
46042 - MONTEREY - 27NM West of Monterey Bay, CA 37 mi36 min NW 5.8 G 7.8 56°F 57°F12 ft1021.9 hPa (-0.0)
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 37 mi38 min NW 4.1 G 5.1
PXOC1 - 9414311 - San Francisco (Pier 1), CA 38 mi38 min W 5.1 G 8 56°F 1021.7 hPa
46092 - MBM1 38 mi71 min W 3.9 56°F 57°F1021.9 hPa (-0.4)
PXSC1 38 mi38 min 57°F 57°F
ELXC1 - Elkhorn Slough Reserve, CA 39 mi101 min WNW 2.9 59°F 1022 hPa55°F
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 40 mi36 min NW 7.8 G 9.7 53°F 57°F13 ft1022.2 hPa (+0.0)
FTPC1 - 9414290 - San Francisco, CA 40 mi38 min N 7 G 8 55°F 54°F1023 hPa
46114 - West Monterey Bay, CA 41 mi26 min 57°F12 ft
46237 - San Francisco Bar, CA (142) 43 mi56 min 54°F12 ft
PPXC1 - 9414847 - Richmond (Point Potrero), CA 44 mi38 min WNW 1 G 2.9 60°F 1023.1 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 45 mi37 min NW 6 55°F 1023 hPa (+0.0)
RCMC1 - 9414863 - Richmond, CA 46 mi38 min NW 5.1 G 6 56°F 54°F1022.6 hPa
46240 - Cabrillo Point, Monterey Bay, CA (158) 48 mi35 min 57°F5 ft
MEYC1 49 mi50 min NNW 5.1 G 5.1 56°F 57°F1022 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 49 mi36 min WSW 3.9 G 5.8 54°F 55°F11 ft1022.6 hPa (+0.0)

Wind History for Redwood City, CA
(wind in knots)    EDIT      (on/off)   Help
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
Last
24hr
W1
N4
E1
--
--
W2
SE2
E4
--
W3
E3
SW2
SE2
S1
E1
NE2
N3
E3
NW8
N6
N7
NW6
NW5
NW5
1 day
ago
NW1
NW1
E2
S3
S1
W6
W2
S3
E1
SW2
W2
W2
N4
E2
S4
NW2
N3
E2
E2
N4
N5
W5
NW6
NW2
2 days
ago
SE3
SE3
S3
S3
S4
S4
SE2
SW4
S4
S3
S3
S1
SW2
S2
S3
SE1
E3
E3
E1
E1
E1
--
N3
NE3

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Mountain View, Moffett Field, CA11 mi90 minN 410.00 miOvercast59°F54°F83%1022.4 hPa
San Jose, San Jose International Airport, CA12 mi33 minWNW 98.00 miMostly Cloudy61°F53°F75%1022.2 hPa
Palo Alto Airport, CA13 mi39 minNW 76.00 miMostly Cloudy with Haze59°F55°F88%1022.3 hPa
San Jose / Reid / Hillv, CA17 mi1.7 hrsNW 410.00 miOvercast63°F50°F64%1021.7 hPa
San Carlos Airport, CA18 mi36 minWNW 56.00 miOvercast with Haze59°F55°F88%1022.3 hPa
Half Moon Bay Airport, CA24 mi31 minW 40.75 miFog/Mist59°F57°F94%1021.7 hPa

Wind History from NUQ (wind in knots)
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
Last 24hrW4--CalmCalmS3SW3CalmSE5SE3NE5CalmCalmE3SW3CalmCalmN3NE3N5N9N5NW3N4NW4
1 day agoW3NE3SE3E74W3NE4SE3S5CalmCalmCalmN3S3CalmNE5SE33N3N3N4N4N8N5
2 days agoNW3W4W3W5W3NW3NW5CalmSW3W3CalmCalmCalmCalmCalmCalmSE33CalmN4N4N4N4Calm

Tide / Current Tables for Palo Alto Yacht Harbor, California
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Palo Alto Yacht Harbor
Click for Map
Tue -- 12:40 AM PST     6.65 feet High Tide
Tue -- 06:50 AM PST     3.01 feet Low Tide
Tue -- 06:59 AM PST     Moonrise
Tue -- 07:21 AM PST     Sunrise
Tue -- 11:54 AM PST     8.77 feet High Tide
Tue -- 05:12 PM PST     Moonset
Tue -- 05:15 PM PST     Sunset
Tue -- 06:18 PM PST     New Moon
Tue -- 07:21 PM PST     -0.45 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
6.56.66.35.754.13.333.65.16.98.38.88.26.85.23.41.80.4-0.4-0.212.94.8

Tide / Current Tables for Dumbarton Point 2.3 mi NE, South San Francisco Bay, California Current
   EDIT      (on/off)   Help   One Week of Data
Dumbarton Point 2.3 mi NE
Click for Map
Tue -- 01:02 AM PST     -0.00 knots Slack
Tue -- 04:38 AM PST     -0.60 knots Max Ebb
Tue -- 06:42 AM PST     0.00 knots Slack
Tue -- 06:59 AM PST     Moonrise
Tue -- 07:21 AM PST     Sunrise
Tue -- 09:12 AM PST     1.00 knots Max Flood
Tue -- 12:02 PM PST     -0.00 knots Slack
Tue -- 04:44 PM PST     -1.37 knots Max Ebb
Tue -- 05:12 PM PST     Moonset
Tue -- 05:15 PM PST     Sunset
Tue -- 06:18 PM PST     New Moon
Tue -- 07:36 PM PST     0.01 knots Slack
Tue -- 10:21 PM PST     1.38 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.70-0.3-0.5-0.6-0.6-0.30.20.710.90.60-0.4-0.8-1.1-1.3-1.4-1-0.50.311.41.3

Weather Map and Satellite Images
       (on/off)   Help
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)
      (on/off)   Help

Ground Weather Radar Station San Francisco Bay Area, CA
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

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.