Monday, January22, 2018 L-36.com


Marine Weather and Tides
Twin Lakes, 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 2:20 AM PST (10:20 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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PZZ535 Monterey Bay- 839 Pm Pst Sun Jan 21 2018
.small craft advisory in effect from 4 am pst Monday through Monday afternoon...
Tonight..W winds 5 kt...becoming southeast after midnight. Wind waves 2 ft or less. W swell 5 to 7 ft at 16 seconds. Slight chance of rain late in the evening, then chance of rain after midnight.
Mon..SW winds 5 to 15 kt. Wind waves 1 to 3 ft. W swell 8 to 10 ft at 15 seconds. Chance of showers in the morning, then slight chance of showers in the afternoon.
Mon night..W winds 10 kt...becoming northeast after midnight. Wind waves 2 ft or less. W swell 6 to 8 ft at 14 seconds.
Tue..N winds 10 kt. Wind waves 2 ft or less. W swell 5 to 7 ft at 13 seconds.
Tue night..W winds 10 kt. Wind waves 2 ft or less. W swell 3 to 5 ft at 12 seconds.
Wed..SW winds 10 to 20 kt. Wind waves 2 to 4 ft. W swell 4 to 6 ft. Chance of rain, then rain likely.
Thu..NW winds 10 kt. Wind waves 2 ft or less. W swell 8 to 10 ft. Chance of showers, then slight chance of showers.
Fri..N winds 10 kt. Wind waves 2 ft or less. W swell 7 to 9 ft.
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 Twin Lakes, CA
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location: 36.83, -122.01     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
46092 - MBM1 6 mi66 min E 5.8 54°F 56°F1027.8 hPa (-0.6)
ELXC1 - Elkhorn Slough Reserve, CA 14 mi96 min ENE 1 47°F 1028 hPa45°F
46240 - Cabrillo Point, Monterey Bay, CA (158) 15 mi60 min 56°F6 ft
MEYC1 17 mi51 min SE 4.1 G 4.1 51°F 57°F1028.3 hPa
46114 - West Monterey Bay, CA 20 mi51 min 55°F16 ft
46042 - MONTEREY - 27NM West of Monterey Bay, CA 21 mi91 min SSE 7.8 G 12 55°F 56°F14 ft1027.6 hPa (-0.5)
46239 - Point Sur, CA (157) 34 mi51 min 57°F13 ft
RTYC1 - 9414523 - Redwood City, CA 48 mi51 min SE 4.1 G 6 53°F 54°F1027.2 hPa

Wind History for Monterey, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Watsonville, Watsonville Municipal Airport, CA14 mi28 minNW 410.00 miOvercast47°F44°F90%1028.2 hPa
Monterey Regional Airport, CA19 mi27 minESE 510.00 miOvercast52°F41°F66%1029.3 hPa
Salinas, Salinas Municipal Airport, CA24 mi28 minSE 310.00 miMostly Cloudy48°F43°F83%1029 hPa

Wind History from WVI (wind in knots)
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Last 24hrNW3NW3W3CalmCalmCalmCalmE4CalmCalmCalmS4SW6W3SW3CalmCalmNW3NW6NW4NW5CalmCalmNW4
1 day agoNW3NW4W4NW4NW3NW3CalmCalmCalmCalmSE55S5CalmSE3NW4NW5NW4CalmNW5NW4NW3NW3NW3
2 days agoCalmCalmNW4NW4NW3NW4Calm3CalmSE3SW6W6CalmN5W3CalmCalmW3CalmNW3N6CalmNW4NW3

Tide / Current Tables for Santa Cruz, Monterey Bay, California (sub)
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Santa Cruz
Click for Map
Mon -- 02:14 AM PST     4.23 feet High Tide
Mon -- 07:17 AM PST     Sunrise
Mon -- 07:44 AM PST     2.44 feet Low Tide
Mon -- 10:34 AM PST     Moonrise
Mon -- 01:11 PM PST     4.00 feet High Tide
Mon -- 05:22 PM PST     Sunset
Mon -- 07:50 PM PST     0.77 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
3.444.24.13.83.32.82.52.52.633.43.843.93.52.82.11.40.90.811.62.3

Tide / Current Tables for Point Pinos, California Current
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Point Pinos
Click for Map
Mon -- 12:45 AM PST     0.60 knots Max Flood
Mon -- 04:08 AM PST     -0.00 knots Slack
Mon -- 06:44 AM PST     -0.56 knots Max Ebb
Mon -- 07:16 AM PST     Sunrise
Mon -- 10:14 AM PST     0.00 knots Slack
Mon -- 10:33 AM PST     Moonrise
Mon -- 12:58 PM PST     0.40 knots Max Flood
Mon -- 03:44 PM PST     -0.00 knots Slack
Mon -- 05:22 PM PST     Sunset
Mon -- 06:55 PM PST     -0.66 knots Max Ebb
Mon -- 10:17 PM PST     0.00 knots Slack
Mon -- 10:55 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.60.60.50.30-0.3-0.5-0.6-0.4-0.2-00.10.30.40.30.2-0.1-0.3-0.6-0.7-0.5-0.3-0.10.2

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.