Monday, January22, 2018 L-36.com


Marine Weather and Tides
Saratoga, 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 7:15AMSunset 5:24PM Monday January 22, 2018 12:00 PM PST (20:00 UTC) Moonrise 10:34AMMoonset 10:55PM Illumination 35% 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
    EDIT      (on/off)   Help
PZZ560 Pigeon Point To Point Pinos To 10 Nm- 830 Am Pst Mon Jan 22 2018
.small craft advisory in effect until 3 pm pst this afternoon...
Today..S winds 5 to 15 kt...becoming nw in the afternoon. Wind waves 3 to 4 ft. W swell 10 to 12 ft at 14 seconds. Chance of showers in the morning, then slight chance of showers in the afternoon.
Tonight..N winds 5 to 15 kt. Wind waves 1 to 3 ft. W swell 8 to 10 ft at 14 seconds.
Tue..NW winds 10 kt. Wind waves 2 to 3 ft. W swell 7 to 9 ft at 13 seconds.
Tue night..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. W swell 4 to 6 ft at 12 seconds.
Wed..W winds 15 to 25 kt. Wind waves 3 to 5 ft. W swell 6 to 8 ft at 12 seconds. Rain in the afternoon. Rain likely.
Thu..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. W swell 10 to 13 ft. Chance of showers.
Fri..NW winds 10 kt. Wind waves 2 ft or less. NW swell 9 to 12 ft.
PZZ500 830 Am Pst Mon Jan 22 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... SWitch to northwesterly winds is progressing down the coast behind the cold front, now located near pigeon point. These winds will slowly diminish as the day progresses. Small craft advisories remain in place mainly due to hazardous sea conditions caused by large swells. These swells will gradually decrease through Tuesday. The next frontal system is set to arrive mid-week bringing back southerly winds and increasing northwest swell.

7 Day Forecast for Marine Location Near Saratoga, CA
   Hourly   EDIT   Help
location: 37.29, -122.05     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus66 kmtr 221830
afdmtr
area forecast discussion
national weather service san francisco bay area
1030 am pst Mon jan 22 2018

Synopsis Light rain will gradually end from north to south
through early afternoon. A dry weather break will return later
this afternoon into Tuesday. The next weather system is forecast
to bring soaking rains and locally gusty winds Wednesday and
Wednesday night with showers lingering Thursday morning. Dry
weather returns again by Friday and into next weekend.

Discussion As of 9:17 am pst Monday... Weak front is gradually
shifting southward through the south bay and towards the central
coast. Rain totals were notably higher north of the golden gate
with remnant showers now expected to only drop light rain for the
next few hours through early afternoon roughly from san jose
southward to salinas with little or no rain for southern
monterey san benito counties. Visible satellite shows rapid
clearing for the north bay already with most areas seeing skies
turn back to partly cloudy by later this afternoon.

Dry and quiet period develop tonight through Tuesday as high
pressure briefly builds.

Next front of interest should bring rain to the north bay by later
weds morning or midday. Similar to trends of late the front
appears to be weakening as it passes through the district weds
afternoon into weds evening with band of steady rain, perhaps
moderate at times. Precip will turn showery quickly behind the
front by Thursday morning as cooler air is ushered over the
region. 12z NAM suggest there will be renewed period of organized
showers Thursday afternoon as the cold core of the upper low
passes overhead.

Beyond that high pressure looks to build with dry weather forecast
Friday and through next weekend.

Prev discussion As of 5:04 am pst Monday... A cold front was slowly
moving southeastward this morning, point arena buoy indicated
frontal passage at midnight. Heavy rain and gusty winds developed
ahead of this front with isolated rain total reports 3.40" at
venado, 2.54" cazadero, and upwards of 1-2" over remaining
locations of sonoma, napa, and marin counties. From last evening
and overnight locally wind gusts peaked to near 40 mph at gualala
and monte rio, elsewhere over the bay area gusts locally reached up
to 20-30 mph.

Moisture and warm air advection prior to the cold front extended
throughout the lower levels and possibly to the mid levels at times
helping to generate a wetter frontal passage, all in all it was a
pretty good rain producer considering the mid level flow is nearly
flat, very low amplitude, and mostly devoid of positive vorticity
advection. The 12z oakland sounding shows the air saturated up to
the 700 mb level. Kmux radar reflectivities still indicate a fair
amount of showers moving west to east at this hour over the bay
area, but the trend is for showers to steadily diminish this morning
as the cold front continues to settle southward.

A dry weather break returns later today into Tuesday. Daytime
temperature recovery will be in the 50s. Night-time temperatures
will be in the 30s to mid 40s, though inland valleys may see lows
in the upper 20s due to a decrease in cloud cover tonight thus
later shifts may need to adjust min temperatures downward a little
if needed. Also, patchy valley fog becomes a little more probable
if it clears out at night.

The next upstream wet weather system is expected to arrive wed-thu,
the incoming developing rain band may be a little slower to arrive
per most recent model output forecasting a delay up to 6 hours. A
strong cold front will interact with strengthening warm air advection,
coupled with large scale dynamics greatly favoring more widespread
soaking rain. The 250 mb jet stream will dig in from the northwest
increasing cyclonic curvature over the forecast area supporting stronger
upper level divergence. The ECMWF and NAM indicate a surface trough
and cold front sweeping in from the northwest later Wednesday. The
00z WRF model run indicates surface to 850 mb winds will be mainly
southwest which would limit rain shadowing effects in the valleys and
greatly increase QPF along windward slopes. To varying degrees recent
model data (within the last month or so) is seemingly more problematic
with regard to wind, QPF forecasts, thus this system normally would
of course need to be watched closely, but as always it's the unknowns
of pacific weather systems that can catch one off-guard sometimes.

This system may be one or our wetter rain producers we've seen so
far this season. Precipitable water values will be between 0.80" and
1" with warm air advection interacting with modified polar air, orographic
forcing, and strong dynamics. After this we get a break from the rain
with upper level ridging returning for late week and the weekend.

Aviation As of 10:20 am pst Monday... For 18z tafs. Satellite
imagery and radar shows rapidly weakening frontal cloud band,
with some lingering embedded showers, now moving into the
monterey bay region. Ceilings are lifting up out of the MVFR range
from the northwest behind it, followed by clearing skies.

However, ceilings are expected to lower back to MVFR once again
tonight, along with fog development in the north bay valleys.

Light winds.

Vicinity of ksfo... Ceilings have lifted out of the MVFR range
withVFR conditions now expected to prevail the remainder of the
day and through the evening rush. Winds will generally be out of
the west and less than 15 kt.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... Currently MVFR at ksns withVFR CIGS at
kmry. Still a few light showers in the area but should end
entirely by early afternoon. Expect ceilings to be close to the
MVFRVFR margin the rest of the day and into the evening, then
lower somewhat overnight.

Marine As of 08:59 am pst Monday... Switch to northwesterly
winds is progressing down the coast behind the cold front, now
located near pigeon point. These winds will slowly diminish as
the day progresses. Small craft advisories remain in place mainly
due to hazardous sea conditions caused by large swells. These
swells will gradually decrease through Tuesday. The next frontal
system is set to arrive mid-week bringing back southerly winds and
increasing northwest swell.

Mtr watches warnings advisories
Tday Sca... Mry bay until 3 pm
sca... Pt reyes to pigeon pt 0-10 nm until 3 pm
sca... Pigeon pt to pt pinos 0-10 nm until 3 pm
sca... Pt arena to pt reyes 0-10 nm
sca... Pt arena to pigeon pt 10-60 nm
sca... Pigeon pt to pt piedras blancas 10-60 nm
sca... Pt pinos to pt piedras blancas 0-10 nm
sca... Rough bar advisory for sf bar
public forecast: rww
aviation: blier
marine: blier
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 17 mi42 min Calm G 2.9 56°F 54°F1027.5 hPa
AAMC1 - 9414750 - Alameda, CA 36 mi48 min ESE 5.1 G 6 53°F 54°F1027 hPa
ELXC1 - Elkhorn Slough Reserve, CA 37 mi90 min SSE 4.1 50°F 1028 hPa46°F
LNDC1 37 mi42 min E 2.9 G 5.1 54°F 1026.9 hPa
46092 - MBM1 37 mi45 min S 12 56°F 56°F1027.6 hPa (+0.5)
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 38 mi42 min ESE 5.1 G 6
46042 - MONTEREY - 27NM West of Monterey Bay, CA 39 mi70 min NW 9.7 G 14 56°F 55°F14 ft1026.9 hPa (+0.7)
OKXC1 - 9414776 - Oakland (Berth 34), CA 39 mi42 min SSE 2.9 G 4.1 57°F 1027 hPa
OBXC1 39 mi42 min 57°F 54°F
PXSC1 40 mi42 min 54°F 54°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 40 mi42 min ESE 8 G 8.9 52°F 1026 hPa
46114 - West Monterey Bay, CA 42 mi30 min 55°F13 ft
FTPC1 - 9414290 - San Francisco, CA 42 mi48 min W 4.1 G 8 55°F 54°F1027.2 hPa
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 44 mi70 min NNW 9.7 G 12 55°F 56°F12 ft1027 hPa (+1.5)
PPXC1 - 9414847 - Richmond (Point Potrero), CA 46 mi42 min SSE 7 G 8.9 55°F 1027.2 hPa
46237 - San Francisco Bar, CA (142) 46 mi60 min 54°F9 ft
TIBC1 - Tiburon Pier, San Francisco Bay, CA 47 mi46 min SE 7 53°F 1027 hPa
46240 - Cabrillo Point, Monterey Bay, CA (158) 47 mi39 min 57°F6 ft
RCMC1 - 9414863 - Richmond, CA 48 mi48 min SSE 4.1 G 7 54°F 54°F1026.6 hPa
MEYC1 48 mi84 min S 11 G 15 58°F 57°F1027.5 hPa

Wind History for Redwood City, CA
(wind in knots)    EDIT      (on/off)   Help
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
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
Last
24hr
E4
E5
G8
NE2
G6
E3
E2
E3
SW3
S3
S5
SE5
SE5
G8
SE4
G8
SE4
E5
SE3
SE5
G10
SE5
G8
SE5
G8
SE4
G8
SE5
G9
SE6
G9
SE7
N2
E2
1 day
ago
N3
G6
N3
G6
N5
G8
NW6
NW7
G11
NW10
W8
G11
SW6
W7
W6
W4
S1
SE1
S1
SE4
SE1
SE3
S3
SE2
W2
SE3
SE2
SE4
E2
2 days
ago
N3
N6
N4
NW11
W10
G14
W11
NW8
G13
W6
W6
W8
W5
W4
W6
W4
W5
NW5
NW4
W5
W2
NW6
NW2
SE2
SE2
NE2

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Jose, San Jose International Airport, CA8 mi67 minSE 33.00 miLight Rain Fog/Mist55°F51°F87%1027.2 hPa
Mountain View, Moffett Field, CA10 mi2.1 hrsS 49.00 miOvercast53°F48°F83%1027.4 hPa
San Jose / Reid / Hillv, CA13 mi73 minS 45.00 miFog/Mist55°F51°F88%1026.7 hPa
Palo Alto Airport, CA14 mi73 minVar 57.00 miMostly Cloudy54°F51°F94%1027.4 hPa
San Carlos Airport, CA20 mi2.1 hrsN 06.00 miFog/Mist54°F53°F100%1027.1 hPa

Wind History from SJC (wind in knots)
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
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
Last 24hr4SW4N5NW5N3NW3CalmS3E4S4SE7SE7SE7SE10SE9SE9SE9SE8SE10E11E11E10SE10SE3
1 day agoW7NW8NW6NW6NW10NW10NW6W7CalmCalmSE4SE3SE3E4SE3SE3SE4SE3SE4S4SE4SE6SE5Calm
2 days agoNW6NW8W12W14NW10NW11NW9W9W8W7W6W5W3W3W6NW5CalmCalmE3SE3CalmCalmCalmNW8

Tide / Current Tables for Gold Street Bridge, Alviso Slough, San Francisco Bay, California
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Gold Street Bridge
Click for Map
Mon -- 04:21 AM PST     8.69 feet High Tide
Mon -- 07:18 AM PST     Sunrise
Mon -- 10:34 AM PST     Moonrise
Mon -- 11:11 AM PST     2.35 feet Low Tide
Mon -- 03:43 PM PST     7.78 feet High Tide
Mon -- 05:21 PM PST     Sunset
Mon -- 10:55 PM PST     Moonset
Mon -- 11:13 PM PST     0.79 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.73.65.87.68.68.57.86.553.72.72.42.84.267.47.87.46.55.13.62.31.30.8

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
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
       (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 (15,3,4,5)
      (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.