Tuesday, August20, 2019 L-36.com


Marine Weather and Tides
Broadmoor, CA

Version 3.4
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7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
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Sunrise 6:28AMSunset 7:57PM Tuesday August 20, 2019 6:25 PM PDT (01:25 UTC) Moonrise 9:53PMMoonset 10:08AM Illumination 71% Phase: Waning Gibbous; Moon at 20 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- 216 Pm Pdt Tue Aug 20 2019
Rest of today..NW winds 10 to 20 kt with gusts up to 25 kt. W swell 2 to 4 ft at 10 seconds.
Tonight..NW winds 10 to 20 kt with gusts up to 25 kt. NW swell 2 to 4 ft at 10 seconds.
Wed..NW winds 15 to 20 kt with gusts up to 25 kt. Wind waves 2 to 3 ft. W swell 2 to 4 ft at 14 seconds.
Wed night..NW winds 15 to 20 kt with gusts up to 30 kt. Wind waves 3 to 4 ft. W swell 4 to 6 ft at 13 seconds.
Thu..NW winds 15 to 25 kt with gusts up to 30 kt. W swell 5 to 7 ft at 11 seconds and sw around 2 ft at 20 seconds.
Thu night..W winds 10 to 15 kt. W swell 5 to 7 ft at 9 seconds and sw around 2 ft at 18 seconds.
Fri..S winds 15 to 20 kt. W swell 4 to 6 ft and sw around 2 ft.
Sat..W winds 5 to 10 kt. Wind waves 2 to 3 ft. W swell 2 to 4 ft and sw around 2 ft.
...san francisco bar/fourfathom bank forecast..... In the deep water channel...seas 5 to 7 ft with a dominant period of 10 seconds. Across the bar...seas 6 to 8 ft with a dominant period of 10 seconds. Maximum ebb current of 2.0 kt at 08:31 pm Tuesday and 1.6 kt at 09:07 am Wednesday.
PZZ500 216 Pm Pdt Tue Aug 20 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Light to moderate northwest winds will persist across the coastal waters through mid-week as high pressure sits over the eastern pacific and a surface low moves into western canada. Locally gusty coastal jets are forecast south of point arena, pigeon point, and point sur that will create hazardous seas conditions for smaller vessels. Breezy afternoon and evening winds are also forecast over the san francisco bay around the golden gate and through the delta as well as over the Monterey bay. Mixed seas will continue with shorter period northwest waves at around 8 to 10 seconds, a light longer period west swell, and a light southerly swell.


7 Day Forecast for Marine Location Near Broadmoor, 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 202350
afdmtr
area forecast discussion
national weather service san francisco bay area
450 pm pdt Tue aug 20 2019

Synopsis A warming trend is forecast through Thursday as high
pressure builds over central and southern california. Inland areas
will see less in the way of night and morning low clouds as the
marine layer compresses. Seasonable temperatures are forecast
through the upcoming weekend, along with continued dry
conditions.

Discussion As of 02:30 pm pdt Tuesday... California is
positioned between two synoptic scale features early this
afternoon -- an advancing trough to the northwest and a
retrograding ridge to the southeast. Both of these features have
played a role in driving the local weather today with the
advancing trough encouraging a deeper marine layer overnight into
this morning and the retrograding ridge suppressing the marine
layer and forcing warmer temperatures and the mostly skies early
this afternoon. While the ridge has taken over as the dominate
feature early this afternoon, the advancing trough will wrest
control from the ridge, at least across the north bay, through the
remainder of the day as cooler, moister air mass advects inland from
the west. Latest satellite imagery shows scattered to broken high
clouds on the leading edge of this air mass boundary now shifting
inland across the mendocino coast and northward at this hour. Expect
to see some of these clouds spread into the north bay and parts of
the immediate bay area later this afternoon into the evening but
will probably arrive too late to drastically impact todays afternoon
high temperatures.

Forecast models have struggled with the specifics of what happens
next but generally agree that the ridge will deflect the advancing
trough northward into the pacnw extreme norcal after attempting to
invade the golden state.

For tonight, the marine layer will become suppressed by the
retrograding ridge across the central coast and parts of the bay
area but may instead mix out across the sonoma marin coastlines due
to the presence of the cooler air aloft in the advancing trough. As
such, would not be surprised to see patchy fog and periods of
drizzle along the coastline from the san mateo coastline southward
through big sur with fractured cloud decks across the north bay.

The long range forecast models then depict a steady rise in
atmospheric heights over the 7 plus days however that rise will
not necessarily dictate a steady rise in temperatures.

For tomorrow, the ridge will become the dominate player after the
trough has deflected to the north into the pacific northwest and
promote the warmest temperatures of this work week for most areas.

That said, the north bay high temperatures may somewhat lag behind
the rest of the forecast area tomorrow after a secondary vort
pulse within the broader parent trough over the pacnw forces it to
briefly dip back into northern california.

Temperatures tomorrow will range from near normal along the
shorelines to up to 10 degrees above normal for the inland areas.

Afternoon highs of 60s to low 70s are forecast along the coast,
upper 70s to upper 80s for areas in some proximity to a
coast shoreline, and into the low to mid 90s for the extreme
inland areas far from the coast. The marine layer should further
compress tomorrow night into Thursday morning which will allow
Thursday morning's temperatures to slightly outpace Wednesday's.

By the afternoon, Thursday temperatures will come into line with
Wednesdays readings though the north east bay should run slightly
warmer than the previous day given the absence of a trough on
their northern periphery.

500mb heights continue to increase into Friday as the ridge shifts
offshore and amplifies. Despite this, temperatures are forecast
to stall or even drop primarily due to a shift in wind direction
to the southwest. This shift in wind direction should increase
the onshore advection of cool, moist air to inland regions despite
the warmer air subsiding from aloft. A warming trend is then
expected through the weekend and into early next week with the
hottest temperatures anticipated to arrive early to mid next
week.

The one potential gotcha in the long range forecast is the
presence of a potential tropical disturbance (80-90% chance of
organization) currently off the southern coast of mexico. GFS euro
ensemble members give this system a roughly 33-40% chance of
moving into the broader vicinity of the sf monterey bay areas by
early next week, potentially introducing increased a wetter, more
unstable air mass underneath a broader high pressure ridge.

Needless to say, there remains a fair amount of uncertainty in the
forecast over the next week.

Aviation As of 4:50 pm pdt Tuesday... An upper level ridge over
the southwest will expand westward into california. This will
compress the marine layer overnight resulting in lower cloud bases
but as the marine layer becomes better defined... There should be
more widespread low clouds late tonight. Low clouds have mixed out
quite well today and will take some time to redevelop so an early
return of CIGS is not expected. CIGS not expected at sfo or the
approach until after 06z.

Vicinity of ksfo... MVFR CIGS after 06z with bases around 1500 ft
possibly lowering to near 1200 ft after 12z. West winds 15-18 kt
gusting to 25 kt through 04z.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... MVFR CIGS after 04z at mry and after 08z
at sns. CIGS lowering to ifr a couple of hours after the CIGS come
in. West winds 10 kt gusting 15-18 kt through 04z.

Marine As of 04:31 pm pdt Tuesday... Light to moderate northwest
winds will persist across the coastal waters through mid-week as
high pressure sits over the eastern pacific and a surface low
moves into western canada. Locally gusty coastal jets are
forecast south of point arena, pigeon point, and point sur that
will create hazardous seas conditions for smaller vessels. Breezy
afternoon and evening winds are also forecast over the san
francisco bay around the golden gate and through the delta as
well as over the monterey bay. Mixed seas will continue with
shorter period northwest waves at around 8 to 10 seconds, a light
longer period west swell, and a light southerly swell.

Mtr watches warnings advisories
Tngt Sca... Sf bay until 9 pm
sca... Mry bay until 9 pm
sca... Pt arena to pt reyes 0-10 nm until 9 pm
sca... Pigeon pt to pt pinos 0-10 nm until 9 pm
sca... Pt pinos to pt piedras blancas 0-10 nm
public forecast: drp
aviation: W pi
marine: as
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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) 4 mi56 min 61°F3 ft
FTPC1 - 9414290 - San Francisco, CA 8 mi56 min WSW 9.9 G 16
PXSC1 11 mi56 min 65°F 59°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 11 mi56 min WSW 15 G 23 65°F 1014.4 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 13 mi36 min WNW 12 G 14 60°F 59°F3 ft1016.8 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 13 mi51 min WSW 6 70°F 1015 hPa
OBXC1 14 mi56 min 65°F 61°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 14 mi56 min W 14 G 19 65°F 1015.3 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 14 mi56 min WSW 11 G 14
AAMC1 - 9414750 - Alameda, CA 16 mi56 min W 11 G 15
RCMC1 - 9414863 - Richmond, CA 16 mi56 min ESE 1.9 G 5.1 66°F
LNDC1 17 mi56 min WSW 8.9 G 12 66°F 1015.5 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 17 mi56 min SSW 5.1 G 8 67°F 1015.5 hPa
RTYC1 - 9414523 - Redwood City, CA 26 mi56 min WNW 15 G 17 70°F 75°F1016.2 hPa
PRYC1 - 9415020 - Point Reyes, CA 27 mi56 min 62°F1016.4 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 28 mi56 min WSW 9.9 G 15 71°F 1014.4 hPa
UPBC1 32 mi56 min WNW 15 G 19
MZXC1 - 9415102 - Martinez-Amorco CA 32 mi56 min WNW 16 G 19 74°F 72°F1014.1 hPa
PCOC1 - 9415144 - Port Chicago, CA 36 mi56 min W 16 G 19 75°F 72°F1014 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 43 mi56 min NW 13 G 16 77°F 1013.2 hPa
SFXC1 - San Francisco Bay Reserve, CA 44 mi101 min W 13 79°F 1014 hPa59°F
46214 - Point Reyes, CA (029) 49 mi56 min 58°F5 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 mi90 minW 21 G 2610.00 miPartly Cloudy and Breezy71°F55°F57%1015.7 hPa
Half Moon Bay Airport, CA17 mi31 minNW 1110.00 miPartly Cloudy63°F57°F83%1016.9 hPa
Oakland, Metro Oakland International Airport, CA20 mi33 minW 1710.00 miPartly Cloudy69°F57°F66%1015.6 hPa
San Carlos Airport, CA23 mi39 minW 11 G 1510.00 miClear72°F53°F53%1015.9 hPa

Link to 5 minute data for KSFO

Wind History from SFO (wind in knots)
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1 day agoS4SW6S7S7S8SW6S7S6SW4SW7W7W6W6W5SW5SW8SW9SW12W9SW10W18W16W16
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2 days agoS12S6S9S10S9S7S8S12S6S6S8S5S6S9E4NE6NE6E6S12
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Tide / Current Tables for San Francisco Bar, California
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San Francisco Bar
Click for Map
Tue -- 02:19 AM PDT     4.58 feet High Tide
Tue -- 06:30 AM PDT     Sunrise
Tue -- 08:26 AM PDT     1.26 feet Low Tide
Tue -- 11:08 AM PDT     Moonset
Tue -- 03:09 PM PDT     5.07 feet High Tide
Tue -- 07:56 PM PDT     Sunset
Tue -- 09:10 PM PDT     1.95 feet Low Tide
Tue -- 10:53 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.74.34.64.543.32.41.71.31.31.82.53.34.14.85.14.94.43.62.82.222.12.4

Tide / Current Tables for South Channel, San Francisco Bay Approach, California Current
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South Channel
Click for Map
Tue -- 12:31 AM PDT     0.97 knots Max Flood
Tue -- 03:51 AM PDT     -0.00 knots Slack
Tue -- 06:29 AM PDT     Sunrise
Tue -- 06:44 AM PDT     -1.31 knots Max Ebb
Tue -- 09:47 AM PDT     0.00 knots Slack
Tue -- 11:08 AM PDT     Moonset
Tue -- 12:53 PM PDT     1.08 knots Max Flood
Tue -- 04:24 PM PDT     -0.00 knots Slack
Tue -- 07:12 PM PDT     -1.28 knots Max Ebb
Tue -- 07:56 PM PDT     Sunset
Tue -- 10:27 PM PDT     0.00 knots Slack
Tue -- 10:52 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.90.90.70.4-0.1-0.7-1.2-1.3-0.9-0.40.10.611.10.90.60.2-0.4-0.9-1.3-1.1-0.7-0.20.2

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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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for San Francisco/Monterey Bay Area, CA (21,6,7,8)
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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.