Saturday, March23, 2019 L-36.com


Marine Weather and Tides
Montara, CA

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 7:07AMSunset 7:25PM Saturday March 23, 2019 1:40 PM PDT (20:40 UTC) Moonrise 9:44PMMoonset 8:06AM Illumination 91% Phase: Waning Gibbous; Moon at 18 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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PZZ545 Coastal Waters From Point Reyes To Pigeon Point California Out To 10 Nm- 840 Am Pdt Sat Mar 23 2019
.small craft advisory for rough bar in effect through Sunday morning...
.small craft advisory in effect through Sunday morning...
Today..NW winds 5 to 15 kt...becoming 10 to 15 kt this afternoon. Wind waves 2 ft or less. W swell 9 to 12 ft at 16 seconds.
Tonight..NW winds 5 to 15 kt. Wind waves 2 ft or less. W swell 9 to 12 ft at 16 seconds and S 1 to 2 ft at 13 seconds.
Sun..SE winds 5 to 15 kt. Wind waves 2 ft or less. W swell 7 to 10 ft at 15 seconds and S 1 to 2 ft at 18 seconds.
Sun night..S winds 15 to 25 kt with gusts up to 35 kt. Wind waves 3 to 5 ft. W swell 6 to 8 ft at 14 seconds and S 1 to 2 ft at 19 seconds. Rain likely.
Mon..W winds 10 to 20 kt with gusts up to 25 kt. Wind waves 3 to 4 ft. W swell 7 to 9 ft at 14 seconds and S 1 to 2 ft at 18 seconds. Rain likely.
Mon night..SE winds up to 10 kt. Wind waves 2 ft or less. W swell 6 to 8 ft at 13 seconds and S 1 to 2 ft at 18 seconds.
Tue..S winds 5 to 15 kt. Wind waves 2 ft or less. W swell 5 to 8 ft and S 1 to 3 ft. Rain.
Wed..SW winds 10 to 20 kt. Wind waves 2 ft or less. W swell 6 to 9 ft and sw 1 to 2 ft. Rain likely.
...san francisco bar/fourfathom bank forecast..... In the deep water channel...combined seas 7 to 10 ft with a dominant of 16 seconds. Across the bar...combined seas 8 to 12 ft with a dominant period of 16 seconds. Maximum ebb current of 2.5 kt at 07:31 pm Saturday and 3.7 kt at 07:19 am Sunday.
PZZ500 840 Am Pdt Sat Mar 23 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Expect moderate to fresh winds from the northwest near the coast today in the wake of this mornings frontal passage. Winds will shift on Sunday to come out of the south and increase ahead of the next system. A long period northwest swell will move through waters into tonight before decaying on Sunday.


7 Day Forecast for Marine Location Near Montara, CA
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location: 37.57, -122.58     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 231817
afdmtr
area forecast discussion
national weather service san francisco bay area
1117 am pdt Sat mar 23 2019

Synopsis Showers will end this morning with partly cloudy skies
and cool temperatures this afternoon. Mainly dry conditions are
expected over the weekend with additional storm systems expected
next week. These systems will bring periods of rain and breezy
conditions to the region.

Discussion As of 08:21 am pdt Saturday... A cold front
associated with a pacific trough pushed through much of the area
overnight, bringing a period of moderate to heavy rain as it
passed through. The front is currently passing through monterey
and san benito counties with clearing to the northwest. Rainfall
totals with this system have ranged from 2-3" in the north bay
mountains, 0.5-1.25" north bay valleys and santa cruz mountains,
0.25-0.75" across the sf bay area and coastal locations, and less
than 0.25" over the southeastern portion of the forecast area.

Showers will continue to move southeast and should move out of the
forecast area by noon today. Behind the front, clouds will
decrease and sunshine will increase this afternoon. Cumulus will
likely develop especially over the higher terrain and a stray
shower cannot be ruled out. Highs today will be cool behind the
front, with upper 50s to lower 60s in most locations. Breezy
northwest winds will also contribute to temperatures feeling cool
this afternoon.

High pressure will keep conditions dry through Sunday afternoon.

Highs on Sunday will rebound several degrees, with 60s in most
locations, although the warmest locations may hit 70. The next
pacific trough will approach the area on Sunday evening with rain
developing over the north bay first. A cold front will start to
push through the region on Sunday night, bringing rain to the bay
area and points north. Southerly winds will increase ahead of the
front and may become gusty near the coast and in the higher
terrain. The front will slowly move south through the day on
Monday but will weaken, therefore the highest rainfall totals will
fall across the north bay with lesser amounts to the south. A few
showers will be possible on Tuesday as the remnants of the front
remain over the region and southwest flow continues.

The next, stronger storm system will move through the area Tuesday
night into Wednesday, with a few showers lingering into Thursday.

Widespread rain will occur across the area from this system, and
many areas will likely see higher rainfall totals than the Monday
system. Ensembles favor a return to dry conditions for late next
week into the following weekend.

Prev discussion As of 2:56 am pdt Saturday... Moderate to heavy rain
is currently impacting portions of the bay area as a cold front
continues to move through the region. Latest surface analysis puts
the cold front currently bisecting the san francisco bay. Kmux
radar imagery continues to show moderate to heavy echoes along and
ahead of the front. Rainfall amounts over the last 24 hours have
been greatest across the north bay with a few jackpots of 2-3" in
the higher terrain. The recent rains have led to stream rises
across the north bay, but nothing of notable concern.

Latest short term models indicate the front will continue to
slowly push southward across the rest of the forecast area through
early Saturday morning. As the front moves from N to S steady
rainfall will diminish. This trend can already be seen with rain
already ending across the north bay. A few lingering showers will
be possible across southern areas through mid-morning, but most
areas north of monterey bay will be dry. Despite a passing cold
front, snow levels will remain just high enough to not see any
frozen precip. Profiler along the big sur coast has kept snow
levels above 6k feet. By Saturday afternoon much of the bay area
will see clearing skies, but cool temperatures. Added some patchy
fog to the forecast Saturday night for the north bay valleys
given the ample low level moisture.

Dry weather is expected for Sunday with seasonably cool
temperatures.

Rain will return to the bay area Sunday night as another cold
front is forecast to sweep across the region. Rain will initially
start over the north bay Sunday night, before spreading southward
by Monday morning. Unlike the current cold front, the Sunday
night front looks to fizzle once it gets south of san jose.

Therefore, rainfall amounts will be greatest across the north bay
and much less south of san jose. A few lingering showers will be
possible Monday afternoon evening. Some of the medium range
models keep a few showers on Tuesday as well with the dissipating
front.

Another disturbance will bring another round of rain Tuesday
night in Thursday. Finally see a drier period next Friday into
Saturday.

Aviation As of 11:17 am pdt Saturday... For 18z tafs. Cold
front is just about gone to the east of the area and skies are
clearing quickly. There are a few clouds lingering around with
maybe an embedded shower, but otherwise things are drying out
quickly. ExpectVFR to dominate through the day and into the
evening hours. Overnight will be an interesting forecast as the
onshore flow is bringing plenty of low level moisture to the area
and will cause some low clouds to develop in many areas. The
pattern is expected to shift overnight with southerly flow
developing which will help to drive out the low level moisture. So
look for low clouds to develop late evening and early overnight
with the low clouds scouring out in the late overnight hours. A
mid to high level cig will likely remain as those clouds decks
will begin to stream in ahead of the next system for Sunday night.

This means that we should haveVFR for most of the day Sunday as
well.

Vicinity of ksfo... ExpectVFR through the day with typical
moderate winds from the west. Low clouds will try to develop
overnight but will scour out quickly as drier air fills in from
the south in the pre sunrise hours.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals...VFR today with ifr possible tonight due
to low CIGS giving way toVFR again tomorrow morning. Winds will
be light to moderate through the day.

Marine As of 10:56 am pdt Saturday... Expect moderate to fresh
winds from the northwest near the coast today in the wake of this
mornings frontal passage. Winds will shift on Sunday to come out
of the south and increase ahead of the next system. A long period
northwest swell will move through waters into tonight before
decaying on Sunday.

Mtr watches warnings advisories
Tday Sca... Pt arena to pt reyes 0-10 nm
sca... Pt reyes to pigeon pt 0-10 nm
sca... Pigeon pt to pt pinos 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... Rough bar advisory for sf bar
sca... Mry bay
public forecast: st
aviation: bfg
marine: bfg
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46237 - San Francisco Bar, CA (142) 15 mi70 min 57°F8 ft
FTPC1 - 9414290 - San Francisco, CA 17 mi58 min 55°F 56°F1023.2 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 19 mi40 min WNW 12 G 16 54°F 55°F1024.1 hPa (+0.7)
PXOC1 - 9414311 - San Francisco (Pier 1), CA 19 mi52 min 57°F 1022 hPa
PXSC1 19 mi58 min 57°F 48°F
AAMC1 - 9414750 - Alameda, CA 20 mi58 min 57°F 58°F1023.2 hPa
RTYC1 - 9414523 - Redwood City, CA 20 mi52 min 58°F 60°F1023.3 hPa
OBXC1 21 mi52 min 56°F 48°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 21 mi52 min 55°F 1022.9 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 21 mi100 min W 8.9 G 9.9
LNDC1 22 mi52 min 57°F 1022.8 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 23 mi53 min Calm 58°F 1023 hPa
RCMC1 - 9414863 - Richmond, CA 26 mi58 min 58°F 57°F1022.4 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 26 mi52 min 58°F 1023 hPa
PRYC1 - 9415020 - Point Reyes, CA 36 mi52 min 55°F1023.3 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 38 mi52 min 57°F 1022.4 hPa
UPBC1 40 mi100 min WNW 12 G 15
MZXC1 - 9415102 - Martinez-Amorco CA 40 mi52 min 57°F 57°F1022.5 hPa46°F
PCOC1 - 9415144 - Port Chicago, CA 44 mi52 min 57°F 56°F1022.3 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 49 mi52 min 59°F 1022 hPa

Wind History for San Francisco, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Half Moon Bay Airport, CA6 mi45 minWNW 87.00 miMostly Cloudy57°F48°F72%1023.7 hPa
San Francisco, San Francisco International Airport, CA12 mi44 minW 1110.00 miPartly Cloudy59°F45°F60%1022.9 hPa
San Carlos Airport, CA18 mi47 minW 910.00 miA Few Clouds59°F39°F48%1023 hPa
Oakland, Metro Oakland International Airport, CA21 mi47 minSW 610.00 miPartly Cloudy59°F46°F64%1023.2 hPa

Wind History from SFO (wind in knots)
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Last 24hrSE6S10SE8E9SE10SE6SE7S6
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1 day agoW9W13W15W17W12W10W10W9SW5S4SE3S4SW5CalmSE5SE4SE4SE6S7E4SE6E7SE6E7
2 days agoSW9SW11W11W10W7W9SW6SW4SW4SW3SE3S6CalmW4SW4CalmSW5W4S3N6N5NE4E7NE5

Tide / Current Tables for Half Moon Bay, California
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Half Moon Bay
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Sat -- 12:49 AM PDT     5.80 feet High Tide
Sat -- 07:06 AM PDT     0.03 feet Low Tide
Sat -- 07:09 AM PDT     Sunrise
Sat -- 09:05 AM PDT     Moonset
Sat -- 01:25 PM PDT     5.00 feet High Tide
Sat -- 07:13 PM PDT     1.08 feet Low Tide
Sat -- 07:24 PM PDT     Sunset
Sat -- 10:43 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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5.65.85.34.32.81.40.400.31.12.23.44.44.94.94.33.42.31.51.11.3234.1

Tide / Current Tables for South Channel, San Francisco Bay Approach, California Current
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South Channel
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Sat -- 02:30 AM PDT     -0.01 knots Slack
Sat -- 05:20 AM PDT     -1.87 knots Max Ebb
Sat -- 07:09 AM PDT     Sunrise
Sat -- 08:41 AM PDT     0.01 knots Slack
Sat -- 09:05 AM PDT     Moonset
Sat -- 11:39 AM PDT     1.57 knots Max Flood
Sat -- 03:16 PM PDT     -0.00 knots Slack
Sat -- 05:46 PM PDT     -1.44 knots Max Ebb
Sat -- 07:24 PM PDT     Sunset
Sat -- 08:55 PM PDT     0.00 knots Slack
Sat -- 10:44 PM PDT     Moonrise
Sat -- 11:48 PM PDT     1.30 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.410.4-0.5-1.4-1.8-1.8-1.3-0.60.311.51.51.30.90.2-0.6-1.3-1.4-1.1-0.600.71.2

Weather Map and Satellite Images
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GOES Local Image of CentralWestCoast    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
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Wind Forecast for San Francisco/Monterey Bay Area, CA (16,3,4,5)
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Ground Weather Radar Station San Francisco Bay Area, CA
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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.