Wednesday, May22, 2019 L-36.com


Marine Weather and Tides
Muir Beach, 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 5:53AMSunset 8:19PM Wednesday May 22, 2019 5:36 AM PDT (12:36 UTC) Moonrise 11:07PMMoonset 8:09AM Illumination 88% 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- 246 Am Pdt Wed May 22 2019
.small craft advisory for rough bar in effect through late tonight...
.small craft advisory in effect through Thursday afternoon...
Today..NW winds 15 to 20 kt...becoming 15 to 25 kt this afternoon. Wind waves 4 to 5 ft. W swell 11 to 13 ft at 12 seconds.
Tonight..NW winds 20 to 30 kt. Wind waves 4 to 5 ft. W swell 12 to 14 ft at 12 seconds.
Thu..NW winds 10 to 20 kt with gusts up to 25 kt. Wind waves 3 to 4 ft. W swell 10 to 12 ft at 11 seconds.
Thu night..SW winds 5 to 15 kt. Wind waves around 3 ft. NW swell 8 to 10 ft at 11 seconds.
Fri..S winds 5 to 15 kt. Wind waves 2 ft or less. NW swell 6 to 8 ft at 10 seconds.
Fri night..W winds 15 to 25 kt with gusts up to 30 kt. Wind waves 3 to 4 ft. NW swell 4 to 6 ft at 10 seconds.
Sat..W winds 10 to 20 kt. Wind waves 3 to 4 ft. NW swell 4 to 6 ft.
Sun..SW winds up to 10 kt. Wind waves 2 ft or less. NW swell 3 to 5 ft.
...san francisco bar/fourfathom bank forecast..... In the deep water channel...combined seas 10 to 12 ft with a dominant period of 13 seconds. Across the bar...combined seas 11 to 14 ft with a dominant period of 13 seconds. Maximum ebb current of 3.4 kt at 06:55 am Wednesday and 1.3 kt at 08:43 pm Wednesday.
PZZ500 246 Am Pdt Wed May 22 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... A large northwest swell has arrived with seas in excess of 15 feet along with larger near shore breaking waves. Low pressure will move inland into the great basin and the central valley on Wednesday. This will result in increasing northwest winds with gale force gusts expected over the northern and outer waters. Gale force winds and large northwest swell will create hazardous conditions through midweek. Moderate wind and seas will persist through the end of the week, particularly in the northern outer waters.


7 Day Forecast for Marine Location Near Muir Beach, CA
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location: 37.78, -122.67     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 221157
afdmtr
area forecast discussion
national weather service san francisco bay area
457 am pdt Wed may 22 2019

Synopsis Isolated to scattered showers will linger through the
early morning before drier conditions develop this afternoon.

Temperatures will be on the warming trend through the remainder of
the week, yet will remain below seasonal averages. Unseasonably cool
and unsettled conditions continue into the upcoming weekend with a
renewed chance of rain showers as another system drops southward
across the region.

Discussion As of 03:16 am pdt Wednesday... Another active
morning with isolated to scattered showers, especially over the
central coast and coastal waters, as a short-wave disturbance
associated with the mid upper level trough digs southward across
the region. Rainfall amounts during the past 6 hours or so range
from a few hundredths to a tenth of an inch for most areas while
some inland portions of the bay area have remained dry. Meanwhile,
locally heavier rainfall has been reported within heavier showers
with totals during the same period of around one- quarter to one-
half of an inch. While these showers are likely to taper off from
north to south through the early morning, we cannot rule out an
isolated thunderstorm or two over the waters or along the central
coast before completely diminishing. Also of note, profiler data
at point sur indicates a snow level of around 5,200 feet with
chew's ridge surface temperature hold around 33-34 deg f. Thus,
cannot rule out the region's highest peaks seeing some snowfall
early this morning. For the remainder of the day, conditions will
dry out with temperatures warming about 4 to 8 degrees across the
interior compared to yesterday.

In wake of the departing mid upper level low, broad troughing will
persist over much of the western portion of the country through late
week. Being on the west side of the trough, temperatures will warm
slightly yet generally remain below seasonal averages with 60s at
the coast to lower middle 70s inland. May get enough daytime heating
on Thursday for a few showers to develop over interior portions of
the central coast based on short-range guidance. However, widespread
rainfall is unlikely through the remainder of the workweek.

Medium and longer range models indicate additional disturbances
rotating through the western periphery of the through this upcoming
weekend. Thus, look for increased chances of rain showers from late
Saturday into Sunday. With this said, confidence in widespread
rainfall occurring over the region remains low at this time.

Something worth keeping an eye on in the coming days if you have
outdoor plans this upcoming weekend. Regardless, cool and unsettled
conditions are likely to persist heading into early next week given
the unseasonably "troughy" pattern over the region.

Aviation As of 04:57 am pdt Wednesday... Upper low is tracking
to the southeast with showers decreasing in coverage from north to
south. A few showers will be possible at sjc mry and sns early
this morning. Clearing is occurring in the wake of the low but
residual low-level moisture is preventing skies from completely
clearing. Most terminals are expected to experience prevailingVFR
conditions through the morning but occasional MVFR will likely
occur through mid to late morning due to the residual moisture.

Generally west-northwest winds this morning at 5-10 kt will
increase this afternoon to 10-15 kt at most sites. MainlyVFR
conditions expected through the evening hours, with mry most
likely to develop MVFR CIGS by mid evening.

Vicinity of ksfo...VFR expected to prevail with sct at 2000-3000
feet this morning but occasional MVFR CIGS possible through late
morning. Breezy west- northwest winds with gusts to 20 kt expected
to decrease early this morning and then increase once again early
this afternoon with gusts 20-25 kt possible.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... Scattered showers near mry possible
through 18z, with decreasing showers near sns through mid
morning. A mix of MVFRVFR expected this morning with clearing
late morning. A return to MVFR CIGS expected around mid evening.

Northwesterly winds of 10-15 kt this afternoon.

Marine As of 03:16 am pdt Wednesday... A large northwest swell
has arrived with seas in excess of 15 feet along with larger near
shore breaking waves. Low pressure will move inland into the great
basin and the central valley on Wednesday. This will result in
increasing northwest winds with gale force gusts expected over the
northern and outer waters. Gale force winds and large northwest
swell will create hazardous conditions through midweek. Moderate
wind and seas will persist through the end of the week,
particularly in the northern outer waters.

Mtr watches warnings advisories
Tday High surf advisory... Caz006-505-509-529-530
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 pt reyes 0-10 nm until 11 am
sca... Pt arena to pigeon pt 10-60 nm until 11 am
glw... Pt arena to pigeon pt 10-60 nm from 11 am
sca... Pigeon pt to pt piedras blancas 10-60 nm until 2 pm
glw... Pigeon pt to pt piedras blancas 10-60 nm from 2 pm
glw... Pt arena to pt reyes 0-10 nm from 11 am
sca... Rough bar advisory for sf bar
sca... Mry bay
public forecast: rgass
aviation: st
marine: st
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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) 2 mi36 min 55°F10 ft
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 9 mi26 min NW 21 G 27 55°F 57°F1010.4 hPa
FTPC1 - 9414290 - San Francisco, CA 11 mi36 min SSW 1 G 2.9 53°F 58°F1009.9 hPa (-0.4)
PXOC1 - 9414311 - San Francisco (Pier 1), CA 15 mi36 min WNW 7 G 11 54°F 1008.7 hPa (-0.3)
PXSC1 15 mi36 min 55°F 49°F
RCMC1 - 9414863 - Richmond, CA 17 mi36 min NNW 5.1 G 8.9 55°F 59°F1009.4 hPa (-0.3)
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 18 mi36 min NW 8 G 12
OBXC1 18 mi36 min 55°F 51°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 18 mi36 min NNW 12 G 15 55°F 1009.6 hPa (-0.5)
PPXC1 - 9414847 - Richmond (Point Potrero), CA 18 mi36 min NW 4.1 G 7 55°F 1009.9 hPa (+0.0)
AAMC1 - 9414750 - Alameda, CA 20 mi36 min WNW 7 G 8.9 54°F 61°F1009.9 hPa (-0.6)
LNDC1 21 mi36 min N 4.1 G 5.1 55°F 1009.5 hPa (-0.5)
PRYC1 - 9415020 - Point Reyes, CA 22 mi36 min 56°F1010.3 hPa (+0.0)
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 29 mi36 min NW 8.9 G 14 54°F 1009.4 hPa (+0.0)
RTYC1 - 9414523 - Redwood City, CA 31 mi36 min WNW 9.9 G 13 55°F 63°F1010.2 hPa (-0.6)
UPBC1 34 mi36 min WNW 9.9 G 14
MZXC1 - 9415102 - Martinez-Amorco CA 34 mi36 min W 12 G 14 54°F 61°F1009.4 hPa (+0.0)54°F
PCOC1 - 9415144 - Port Chicago, CA 38 mi36 min W 13 G 14 53°F 62°F1009.4 hPa (-0.3)
46214 - Point Reyes, CA (029) 44 mi36 min 55°F16 ft
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 45 mi36 min W 7 G 11 53°F 1009 hPa (+0.0)
SFXC1 - San Francisco Bay Reserve, CA 45 mi51 min WNW 5.1 51°F 1009 hPa47°F
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 46 mi26 min NW 21 G 27 54°F1010.1 hPa

Wind History for San Francisco, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Francisco, San Francisco International Airport, CA20 mi40 minWNW 128.00 miPartly Cloudy53°F48°F86%1009.6 hPa
Half Moon Bay Airport, CA21 mi41 minNNW 14 G 208.00 miOvercast54°F50°F88%1010.2 hPa
Oakland, Metro Oakland International Airport, CA24 mi43 minNW 910.00 miMostly Cloudy55°F46°F74%1009.7 hPa

Wind History from SFO (wind in knots)
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2 days agoS9Calm44W12W13
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Tide / Current Tables for San Francisco Bar, California
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San Francisco Bar
Click for Map
Wed -- 01:17 AM PDT     5.41 feet High Tide
Wed -- 05:55 AM PDT     Sunrise
Wed -- 08:14 AM PDT     -0.84 feet Low Tide
Wed -- 09:09 AM PDT     Moonset
Wed -- 03:47 PM PDT     4.28 feet High Tide
Wed -- 08:19 PM PDT     Sunset
Wed -- 08:23 PM PDT     3.00 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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5.15.45.34.63.420.6-0.4-0.8-0.7-0.10.81.82.83.64.24.34.13.73.333.13.43.9

Tide / Current Tables for South Channel, San Francisco Bay Approach, California Current
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South Channel
Click for Map
Wed -- 02:35 AM PDT     -0.00 knots Slack
Wed -- 05:54 AM PDT     -1.82 knots Max Ebb
Wed -- 05:55 AM PDT     Sunrise
Wed -- 09:09 AM PDT     Moonset
Wed -- 09:37 AM PDT     0.01 knots Slack
Wed -- 12:44 PM PDT     1.35 knots Max Flood
Wed -- 04:38 PM PDT     -0.00 knots Slack
Wed -- 06:35 PM PDT     -0.74 knots Max Ebb
Wed -- 08:18 PM PDT     Sunset
Wed -- 09:36 PM PDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.90.70.3-0.3-1-1.6-1.8-1.6-1.1-0.40.30.91.31.31.20.90.4-0.2-0.7-0.7-0.5-0.20.10.5

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 (8,2,3,4)
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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.