Sunday, October20, 2019 L-36.com


Marine Weather and Tides
Broadmoor, CA

Version 3.4
NOTICE
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 7:21AMSunset 6:27PM Sunday October 20, 2019 2:07 PM PDT (21:07 UTC) Moonrise 10:45PMMoonset 12:51PM Illumination 53% Phase: Third Quarter Moon; Moon at 22 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- 828 Am Pdt Sun Oct 20 2019
.small craft advisory in effect from 1 pm pdt this afternoon through Monday afternoon...
Today..NW winds 10 to 20 kt. Gusts to 25 kt in the afternoon. Wind waves 1 to 2 ft, increasing to 3 to 4 ft this afternoon. NW swell 8 to 10 ft at 14 seconds and sw around 2 ft at 20 seconds.
Tonight..NW winds 10 to 20 kt...with gusts to 25 kt. Wind waves 2 to 3 ft. NW swell 6 to 8 ft at 13 seconds and sw around 2 ft at 19 seconds.
Mon..NW winds 10 to 20 kt...with gusts to 25 kt. Wind waves 3 to 4 ft. NW swell 6 to 8 ft at 13 seconds and sw around 2 ft at 18 seconds.
Mon night..NW winds 10 to 20 kt. Wind waves 3 to 4 ft. NW swell 6 to 8 ft at 12 seconds and sw around 2 ft at 16 seconds.
Tue..NW winds 5 to 15 kt. Wind waves 1 to 2 ft. NW swell 6 to 8 ft at 11 seconds and sw around 2 ft at 16 seconds.
Tue night..NW winds 10 to 20 kt. Wind waves 2 to 3 ft. NW swell 6 to 8 ft at 11 seconds and sw around 2 ft at 16 seconds.
Wed..N winds 5 to 15 kt. Wind waves 1 to 2 ft. NW swell 6 to 8 ft and S around 2 ft.
Thu..NE winds up to 10 kt. Wind waves 1 ft. NW swell 5 to 7 ft and S around 2 ft.
...san francisco bar/fourfathom bank forecast..... In the deep water channel...seas 6 to 8 ft with a dominant period of 13 seconds. Across the bar...seas 7 to 9 ft with a dominant period of 13 seconds. Maximum ebb current of 0.9 kt at 10:31 am Sunday and 2.9 kt at 09:13 pm Sunday.
PZZ500 828 Am Pdt Sun Oct 20 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... High pressure over the eastern pacific and lower pressure inland will result in moderate northerly winds over the coastal waters today. Winds will be locally stronger south of Monterey bay along the coast. Northerly winds will increase this evening over the north of point reyes and over the outer waters. These gusty winds will result in hazardous conditions. A moderate northwest swell will also continue to moves through the coastal waters.


7 Day Forecast for Marine Location Near Broadmoor CDP, CA
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location: 37.74, -122.59     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 201730
afdmtr
area forecast discussion
national weather service san francisco bay area
1030 am pdt Sun oct 20 2019

Synopsis A warming and drying trend will begin today and
continue through Thursday as high pressure strengthens over
california. In addition, offshore flow will develop by Monday, and
increase by midweek, which will result in warm temperatures
reaching all the way to the coast. Locally gusty offshore winds
may develop at times in the hills, especially in the north bay
hills on Wednesday night and Thursday morning. In the longer
range, cooling is forecast next weekend.

Discussion As of 08:00 am pdt Sunday... Low level moisture
developed into low clouds and patchy fog overnight across portions
of the south bay, monterey coast, and salinas valley early this
morning. These clouds and patchy fog have already begun to mix out
and should dissipate by mid morning.

High pressure will begin to build into the state today, marking
the beginning of a warming drying trend that will extend through
much of the upcoming week. Temperatures this afternoon will run
around 2 to 5 degrees warmer than yesterday, with highs in the mid
60s to low 70s along most of the coast, and mid 70s to around 80
inland. By tomorrow, afternoon temperatures will be tangibly
warmer and the first day of this warming trend to see above
seasonal normal temperatures. Thursday looks to be the warmest
day of the upcoming week with highs along the coast in the 70s to
around 80 while inland areas will range in the 80s to around 90. One
forecast challenge today will be to determine if temperatures
need to be ramped up slightly on Thursday as models tend to
struggle to capture the extent of warming coastal areas see during
our fall offshore flow warming trends.

Speaking of offshore, north to northeast winds are forecast to
gradually increase as the sfo-wmc gradient increases through the
upcoming week, peaking later Wednesday into Thursday.

In addition to these winds, the unseasonably warm dry air mass
associated with the building high pressure will lead to increase
fire weather risk, particularly across the higher elevations of
the north bay. Longer term ensemble guidance is also picking up on
the possibility of another offshore wind event by next weekend,
however, that could change if the modeled trajectory and
positioning of the "insider slider" system shifts over the coming
days. See previous discussion for more information on the current
forecast.

Previous discussion As of 3:10 am pdt Sunday... Satellite fog
product shows residual low clouds along the coast from about half
moon bay south through the monterey bay, and extending into the
salinas valley. Patchy fog is also around with sts reporting 3
miles visibility, and salinas is at 5 miles. Dry air moving in
from the north by morning should serve to clear out these low
clouds and patchy fog.

An upper level ridge over the eastern pacific will build and shift
eastward over the next several days. This will result in a warming
trend, especially by Monday and Tuesday. High temps today are
expected to only be a few degrees warmer than Saturday, with a
5-10 degree jump by Monday. High temperatures to level out by
midweek, but warmest inland areas could approach 90 degrees over
this time frame.

In addition to the warming temperatures, offshore flow is forecast
to develop. The warming and drying conditions coupled with
offshore flow will bring the potential for critical fire weather
conditions, especially after midweek when gusty offshore winds
could be the strongest. However 00z model runs have weakened the
forecast gradients somewhat, with the GFS indicating only about 6
mb from wmc-sfo Tuesday and Wednesday nights. The ECMWF is
substantially less than this. But, as previously noted, even if
winds aren't extremely high, the prolonged warming and drying of
the atmosphere will still make for potentially critical fire
weather conditions. Cooler weather is indicated by next weekend as
an upper level trough drops southward from western canada.

Aviation As of 10:29 am pdt Sunday... Morning clouds and patchy
fog continue to dissipate with all terminals becomingVFR. Expect
vfr through much of tonight. Latest guidance suggests some
increasing low level moisture over the coastal waters tonight with
patchy CIGS developing along the coast and around monterey bay
region. Confidence is low for another round of fog tonight, but
with develop NE flow decided to keep fog out for now.

Vicinity of ksfo...VFR. West wind increasing and becoming gusty to
20 to 25 knots from 21z today to 05z this evening. Light ne
overnight.

Sfo bridge approach... Same as ksfo.

Monterey bay terminals...VFR this afternoon and early tonight.

Some patchy CIGS and fog may impact sns and mry tomorrow morning.

Fire weather As of 3:55 pm pdt Saturday... Heightened fire
weather concerns are expected next week as periods of offshore
flow combine with gusty winds at times to create critical to near
critical fire weather conditions. Locally breezy northwest to
north winds are expected in the hills Sunday, but relative
humidity values will remain somewhat elevated. A warming and
drying trend will get underway on Sunday, and especially on
Monday, as high pressure builds over california and offshore flow
develops. Offshore flow will mostly be light through Tuesday
night, except locally moderate and gusty at times in the hills.

Relative humidity values will drop into the teens by Monday
afternoon and very poor overnight humidity recoveries are expected
in the hills starting Monday night. Warm and very dry conditions
will then persist for the remainder of next week. The period of
greatest concern is Wednesday night and Thursday morning when some
models indicate the potential for strong and gusty north to
northeast winds in the hills, mainly across the higher elevations
of the north bay. Fire weather watches and or red flag warnings
may be issued over the next few days if critical fire weather
conditions are deemed likely to occur.

Marine As of 10:24 am pdt Sunday... High pressure over the
eastern pacific and lower pressure inland will result in moderate
northerly winds over the coastal waters today. Winds will be
locally stronger south of monterey bay along the coast. Northerly
winds will increase this evening over the north of point reyes and
over the outer waters. These gusty winds will result in hazardous
conditions. A moderate northwest swell will also continue to moves
through the coastal waters.

Mtr watches warnings advisories
Tday Sca... Pigeon pt to pt pinos 0-10 nm from 11 am
sca... Pt pinos to pt piedras blancas 0-10 nm
sca... Pigeon pt to pt piedras blancas 10-60 nm
sca... Pt arena to pt reyes 0-10 nm from 1 pm
sca... Pt reyes to pigeon pt 0-10 nm from 1 pm
public forecast: drp
aviation: mm
marine: mm
fire weather: dykema
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46237 - San Francisco Bar, CA (142) 4 mi67 min 55°F6 ft
FTPC1 - 9414290 - San Francisco, CA 8 mi55 min SW 8 G 11 62°F 57°F1020.9 hPa
PXSC1 11 mi49 min 68°F 42°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 11 mi55 min ESE 4.1 G 5.1 65°F 1019.7 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 13 mi37 min NW 9.7 G 14 56°F 53°F1021.6 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 13 mi56 min SE 7 65°F 1020 hPa
OBXC1 14 mi49 min 65°F 51°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 14 mi55 min WNW 1.9 G 4.1 62°F 1020.6 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 14 mi55 min SW 1.9 G 2.9
AAMC1 - 9414750 - Alameda, CA 16 mi55 min WSW 2.9 G 4.1 63°F 61°F1021.1 hPa
RCMC1 - 9414863 - Richmond, CA 16 mi49 min 59°F
LNDC1 17 mi55 min WNW 4.1 G 6 68°F 1020.5 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 17 mi55 min SSW 9.9 G 12 63°F 1020.9 hPa
RTYC1 - 9414523 - Redwood City, CA 26 mi55 min N 7 G 11 69°F 64°F1021.5 hPa
PRYC1 - 9415020 - Point Reyes, CA 27 mi55 min 53°F1021 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 28 mi49 min SW 2.9 G 4.1 64°F 1019.9 hPa
UPBC1 32 mi49 min W 8.9 G 9.9
MZXC1 - 9415102 - Martinez-Amorco CA 32 mi55 min WNW 8 G 8.9 68°F 63°F1020.2 hPa44°F
PCOC1 - 9415144 - Port Chicago, CA 36 mi55 min W 9.9 G 11 69°F 63°F1020.2 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 43 mi55 min NW 2.9 G 6 70°F 1019.9 hPa
SFXC1 - San Francisco Bay Reserve, CA 44 mi82 min SSW 1.9 73°F 1021 hPa43°F
46214 - Point Reyes, CA (029) 49 mi37 min 54°F10 ft

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, CA15 mi71 minWNW 1210.00 miA Few Clouds72°F41°F33%1020.8 hPa
Half Moon Bay Airport, CA17 mi32 minNNW 13 G 218.00 miFair63°F44°F52%1021.3 hPa
Oakland, Metro Oakland International Airport, CA20 mi14 minWSW 910.00 miA Few Clouds68°F48°F51%1020.1 hPa
San Carlos Airport, CA23 mi20 minNNW 910.00 miClear72°F42°F36%1020.3 hPa

Link to 5 minute data for KSFO

Wind History from SFO (wind in knots)
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Last 24hrW12W12W10W10W8W11W12W7NW6NW3CalmNW4CalmSW3CalmNW3SW3S3CalmCalmE4E5W12W14
1 day agoW16W18W18W12W14W14W15W15W7W12W11W7W5W9NW3W6W8W5SE3CalmNW8NW8SW10SW13
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Tide / Current Tables for San Francisco Bar, California
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San Francisco Bar
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Sun -- 05:40 AM PDT     4.13 feet High Tide
Sun -- 07:23 AM PDT     Sunrise
Sun -- 10:03 AM PDT     3.35 feet Low Tide
Sun -- 01:51 PM PDT     Moonset
Sun -- 03:53 PM PDT     5.10 feet High Tide
Sun -- 06:26 PM PDT     Sunset
Sun -- 11:00 PM PDT     0.13 feet Low Tide
Sun -- 11:45 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.91.62.43.13.74.14.143.73.43.33.43.74.24.655.14.94.23.22.110.40.1

Tide / Current Tables for South Channel, San Francisco Bay Approach, California Current
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South Channel
Click for Map
Sun -- 02:30 AM PDT     1.15 knots Max Flood
Sun -- 06:33 AM PDT     -0.00 knots Slack
Sun -- 07:23 AM PDT     Sunrise
Sun -- 08:34 AM PDT     -0.72 knots Max Ebb
Sun -- 11:18 AM PDT     0.00 knots Slack
Sun -- 01:51 PM PDT     Moonset
Sun -- 02:17 PM PDT     0.66 knots Max Flood
Sun -- 05:10 PM PDT     -0.00 knots Slack
Sun -- 06:26 PM PDT     Sunset
Sun -- 08:48 PM PDT     -1.57 knots Max Ebb
Sun -- 11:45 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.30.81.11.110.70.3-0.2-0.7-0.7-0.4-0.10.20.50.70.60.40.1-0.4-0.9-1.4-1.6-1.3-0.8

Weather Map
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GEOS 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 (17,4,5,8)
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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.