Thursday, January17, 2019 L-36.com


Marine Weather and Tides
Broadmoor, 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 7:21AMSunset 5:18PM Thursday January 17, 2019 12:27 AM PST (08:27 UTC) Moonrise 2:08PMMoonset 3:39AM Illumination 86% Phase: Waxing Gibbous; Moon at 11 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- 859 Pm Pst Wed Jan 16 2019
.gale warning in effect until 3 am pst Thursday...
Tonight..S winds 25 to 35 kt with gusts up to 50 kt... Becoming sw 15 to 20 kt with gusts up to 25 kt after midnight. Wind waves 9 to 12 ft...subsiding to 3 to 5 ft after midnight. W swell 5 to 7 ft at 17 seconds...building to 8 to 13 ft at 22 seconds after midnight. A chance of Thunderstorms this evening. Showers. A slight chance of Thunderstorms after midnight.
Thu..SW winds 15 to 25 kt with gusts up to 30 kt. Wind waves 4 to 7 ft. W swell 15 to 20 ft at 22 seconds. Showers and a slight chance of Thunderstorms.
Thu night..W winds 5 to 15 kt. Wind waves 2 ft or less. W swell 17 to 22 ft at 18 seconds.
Fri..E winds 5 to 15 kt. Wind waves 2 ft or less. W swell 11 to 16 ft at 15 seconds.
Fri night..E winds 5 to 10 kt. Wind waves 2 ft or less. W swell 8 to 11 ft at 14 seconds.
Sat..NE winds 5 to 15 kt. Wind waves 2 ft or less. W swell 6 to 8 ft.
Sat night..NE winds up to 10 kt. Wind waves 2 ft or less. W swell 7 to 9 ft.
Sun..NW winds 10 to 15 kt. Wind waves 3 to 4 ft. W swell 5 to 8 ft. A chance of rain.
Martin luther king jr day..NW winds 10 to 20 kt. Wind waves 3 to 4 ft. W swell 4 to 6 ft. Winds and wind waves higher in and near Thunderstorms.
...san francisco bar/fourfathom bank forecast..... In the deep water channel...combined seas 10 to 13 at 14 seconds, increasing to 15 to 20 ft around Sunrise at 20 seconds. Across the bar...combined seas 12 to 15 at 14 seconds, increasing to 17 to 22 ft around Sunrise at 20 seconds. Maximum ebb current of 1.3 knots at 12:55 am Thursday and 3.2 knots at 12:49 pm Thursday.
PZZ500 859 Pm Pst Wed Jan 16 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Wednesday's powerful system will continue pushing inland, allowing for the gale-force winds to slowly subside through the night. Scattered rain showers -- locally heavy, at times -- will continue through Sunrise Thursday. In addition, a very large and long period west swell will arrive Thursday morning and persist into Friday. This incoming swell will prolong the hazardous sea conditions throughout the waters, particularly for small vessels.


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 170611
afdmtr
area forecast discussion
national weather service san francisco bay area
1011 pm pst Wed jan 16 2019

Synopsis Cold front pushing through the area will keep heavy
rain going into early Thursday morning across the central coast.

Behind the front, showers and gusty winds will continue but will
be much lighter than the prefrontal activity. Showers and isolated
thunderstorms will continue on Thursday. Dry Friday and Saturday
with a chance of some light rain on Sunday as a weak front passes
through. Dry weather returns Monday through most of next week.

Discussion As of 10:10 pm pst Wednesday... Cold front pushing
through the area this evening with heavy rain ahead of it and
numerous showers behind it. Convection remains possible with
lightning being observed across parts of the area, with the
greatest threat of thunderstorms and heavy rain now shifting into
the central coast for the next several hours. Heavy rain will also
continue through about 11 pm in the south and east bay with
showers north and west of this area. Convective showers will bring
heavy rain rates and very gusty winds. As the cold front and
associated band of heavy rain has pushed through, impressive
hourly rainfall rates of 0.2 to 0.4 inches per hour have been
observed in most lower elevation sites, with upwards of 0.5 inches
per hour in the higher elevations. Higher rates in shorter time
frames have been observed under convective cells. We have received
multiple reports of small stream and urban flooding as well as
some rock and mud slides today. As precipitation tapers to showers
behind the front, small stream flood threat will gradually
decrease but creeks will remain high overnight. Showers overnight
will decrease the rate at which these streams can recede but are
unlikely to cause additional rises on the smaller creeks.

Additionally, major rivers have been increasing rapidly and many
will approach monitor stage overnight. Will continue to monitor
rises on these rivers. Heavy rainfall will continue across the
central coast, especially the santa lucias through about 1 am
before tapering off to showers the remainder of the night.

Very gusty and damaging southerly winds have been the other major
issue today. For example sfo reported a gust of 61 mph late in
the afternoon with gusts in the 50s for several hours. Winds in
the higher terrain have been very strong with gusts in the 70-90
mph range across the highest peaks. These gusty winds have caused
tree and powerline damage across the area with several reports of
trees down and power outages. Winds will gradually subside
overnight behind the front but will remain gusty for at least a
few more hours. Across the central coast, very strong winds will
continue for the next several hours until the front pushes
through.

Showers and isolated thunderstorms will continue into Thursday as
the unstable air with the trough moves overhead. Small hail and
isolated lightning will be possible under convective cells. The airmass
will gradually stabilize towards sunset ending the threat of
thunderstorms by evening. Additional rainfall amounts will be much
less than today but brief heavy rain is possible under convective
cells. Conditions will dry out Friday and Saturday with another
chance of light rain on Sunday. See the previous discussion for
more details.

Prev discussion As of 2:13 pm pst Wednesday... Forecast cold frontal
passage is still on track. We've had several lightning strikes
offshore with a few over san mateo and around pt reyes. The
heaviest rain is currently falling across the north bay with rates
around 0.30 per hour for sonoma and marin where an urban and
small stream flood advisory has been issued to deal with the
evening commute and rising creeks (willow brook at penngrove
park). The wind advisory remains in effect for the interior valley
with high wind warnings for the coast and hills through 3 am
Thursday. The buoys are still getting southeast winds in excess of
40 kts as the 970 mb low to our north continues to deepen. The
boundary will pass through the district this evening with strong
wind gusts in excess of 50 mph and several hours of moderate to
heavy rainfall. In sum the forecast remains on track with no major
changes. The bulk of the storm will impact the region from now
(north bay) through around midnight (central coast).

Will be watching the rises on the main stem rivers but the napa
and russian are forecast to stay comfortably below flood stages
even though they will see very impressive rises over the next 24
hours. The carmel river at robles del rio is still forecast to
reach monitor stage around sunrise. Due to recent and forecast
heavy rains in the santa lucia range the big sur and san antonio
rivers are forecast to reach action stages as heavy runoff comes
off the hills the next 24 hours.

For Thursday expect numerous showers and thunderstorms in post-
frontal environment. Even though there will be plenty of sunny
breaks convective showers will bring brief heavy downpours, small
hail and possible isolated lightning on Thursday. However, the
main storm impacts will be confined to the weds night frontal
passage.

Please read the beaches section below regarding high surf warning
and coastal flood advisory that GOES into effect Thursday for
large incoming surf.

Dry conditions Friday and Saturday. Weak front still progged for
Sunday with a chance of light rain.

High pressure returns Monday through next week as high pressure
builds. Long range models keep things dry through the end of the
month but show some signs of a return to wet weather by the
beginning of feb as a trough tries to undercut the ridge.

Aviation As of 10:02 pm pst Wednesday... For 06z TAF package.

Latest surface observations indicate the start of a gradual
decrease in winds speeds at most TAF sites. Sfo reported the
highest gust of all TAF sites at 53 kt earlier this evening. The
steady moderate to heavy rain will become more showery over the
next several hours as the cold front pushes through the bay area.

These showers are forecast to continue into Thursday morning with
some locally gusty winds persisting at some of the wind-prone
terminals.

Vicinity of ksfo... Strong, gusty southerly winds will gradually
subside at the terminal over the next several hours as the main
frontal passage pushes eastward. Expect the gusts to drop below
airport weather warning criteria (35 kt) sometime around midnight
local time. Rain intensity will also decrease in the coming hours,
though scattered showers will likely continue off on through
sunrise.

Sfo bridge approach... Similar to sfo.

Monterey bay terminals... Very brief strong wind are presently
passing through mry as of the 06z TAF publication time. Moderate
to heavy rain will accompany these strong winds for another few
hours before transitioning to rain showers. Winds will then
gradually subside from midnight onward.

Beaches As of 04:10 am pst Wednesday... A strong cold front
will push through the region this afternoon and evening bringing
locally heavy rainfall, strong and gusty winds as well as the
potential for isolated to scattered thunderstorms. This will
result in hazardous conditions along area beaches. In wake of the
frontal passage, a large and long period westerly swell will
impact the coast Thursday into Friday. Westerly swells of 16 to 24
feet with a period of 17 to 18 seconds will build through the day
Thursday and result in breaking waves of 25 to 30 feet, favored
locations up to or exceeding 40 feet. Thus, a high surf advisory
has been issued. These large breaking waves will lead to
increased wave run- up on beaches with waves topping and washing
over large rocks and jetties. These conditions may also produce
localized coastal flooding of vulnerable locations. Use extreme
caution near the surf zone as these large waves will be capable of
sweeping people into the frigid and turbulent ocean water. Cold
water shock may cause cardiac arrest, and it also can cause an
involuntary gasp reflex causing drowning, even for a good swimmer.

The surf zone will be very dangerous due to strong currents and
powerful breaking waves. The large swell is forecast to gradually
subside on Friday.

Marine As of 10:00 pm pst Wednesday... Wednesday's powerful
system will continue pushing inland, allowing for the gale-force
winds to slowly subside through the night. Scattered rain showers
-- locally heavy, at times -- will continue through sunrise
Thursday. In addition, a very large and long period west swell
will arrive Thursday morning and persist into Friday. This
incoming swell will prolong the hazardous sea conditions
throughout the waters, particularly for small vessels.

Mtr watches warnings advisories
Tngt High wind warning... Caz006-505-507-509-511-512-517-518-529-
530
wind advisory... Caz506-508-510-513-516-528
flash flood watch... Caz006-505>513-517-528>530
glw... Sf bay until 3 am
glw... Mry bay until 3 am
glw... Pt arena to pt reyes 0-10 nm until 3 am
glw... Pt reyes to pigeon pt 0-10 nm until 3 am
glw... Pigeon pt to pt pinos 0-10 nm until 3 am
glw... Pt pinos to pt piedras blancas 0-10 nm until 3 am
glw... Pt arena to pigeon pt 10-60 nm until 3 am
glw... Pigeon pt to pt piedras blancas 10-60 nm until 3 am
public forecast: st
aviation: rowe
marine: rowe
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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 mi88 min 56°F11 ft
FTPC1 - 9414290 - San Francisco, CA 8 mi46 min SSW 9.9 G 15 57°F 55°F1009.5 hPa
PXSC1 11 mi46 min 59°F 56°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 11 mi46 min S 7 G 13 58°F 1008.1 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 13 mi38 min SSW 18 G 25 57°F 56°F12 ft1009.5 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 13 mi47 min SSE 7 57°F 1009 hPa
OBXC1 14 mi40 min 58°F 54°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 14 mi40 min SW 15 G 23 58°F 1009.3 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 14 mi46 min SW 25 G 31
AAMC1 - 9414750 - Alameda, CA 16 mi46 min SSW 17 G 20 57°F 53°F1009.9 hPa
RCMC1 - 9414863 - Richmond, CA 16 mi40 min 53°F
LNDC1 17 mi46 min SSW 12 G 18 58°F 1009.5 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 17 mi40 min SW 22 G 29 58°F 1008.7 hPa
RTYC1 - 9414523 - Redwood City, CA 26 mi46 min S 11 G 15 58°F 53°F1010.3 hPa
PRYC1 - 9415020 - Point Reyes, CA 27 mi46 min 55°F1008 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 28 mi40 min SW 16 G 23 58°F 1008.5 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 32 mi46 min SW 17 G 23 59°F 51°F1008.8 hPa59°F
PCOC1 - 9415144 - Port Chicago, CA 36 mi46 min SW 13 G 22 59°F 51°F1008.8 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 43 mi40 min WSW 9.9 G 18 59°F 1008.7 hPa
SFXC1 - San Francisco Bay Reserve, CA 44 mi103 min SW 15 57°F 1008 hPa55°F
46214 - Point Reyes, CA (029) 49 mi58 min 56°F15 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 mi32 minSSW 23 G 309.00 miMostly Cloudy and Windy59°F51°F75%1009.3 hPa
Half Moon Bay Airport, CA17 mi33 minS 17 G 223.00 miFog/Mist57°F53°F88%1010.5 hPa
Oakland, Metro Oakland International Airport, CA20 mi35 minSW 169.00 miOvercast58°F53°F84%1010.2 hPa
San Carlos Airport, CA23 mi33 minSW 16 G 2210.00 miMostly Cloudy59°F50°F72%1009.8 hPa

Wind History from SFO (wind in knots)
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1 day agoSE6SE10S6SE13SE6SE11SE11SE11SE13SE10E13NE9NE12NE15NE10E6SE13SE11S7SW12S10S10
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2 days agoCalmCalmCalmCalmCalmSW4CalmNE6CalmCalmCalmE7E10E14E12S10S12SE10SE3S5SE6SE3SE5
G14
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G16

Tide / Current Tables for San Francisco Bar, California
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San Francisco Bar
Click for Map
Thu -- 12:44 AM PST     2.66 feet Low Tide
Thu -- 03:38 AM PST     Moonset
Thu -- 07:06 AM PST     6.08 feet High Tide
Thu -- 07:24 AM PST     Sunrise
Thu -- 02:07 PM PST     Moonrise
Thu -- 02:11 PM PST     -0.18 feet Low Tide
Thu -- 05:17 PM PST     Sunset
Thu -- 09:19 PM PST     4.20 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.72.733.64.45.25.86.15.95.13.92.41.10.2-0.2-00.51.32.23.13.84.24.13.7

Tide / Current Tables for South Channel, San Francisco Bay Approach, California Current
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South Channel
Click for Map
Thu -- 02:08 AM PST     0.00 knots Slack
Thu -- 03:38 AM PST     Moonset
Thu -- 05:12 AM PST     1.04 knots Max Flood
Thu -- 07:23 AM PST     Sunrise
Thu -- 08:28 AM PST     -0.01 knots Slack
Thu -- 11:41 AM PST     -1.85 knots Max Ebb
Thu -- 02:07 PM PST     Moonrise
Thu -- 03:25 PM PST     0.00 knots Slack
Thu -- 05:17 PM PST     Sunset
Thu -- 06:27 PM PST     1.36 knots Max Flood
Thu -- 10:10 PM PST     -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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-0.8-0.4-0.10.40.8110.70.3-0.4-1.2-1.7-1.8-1.5-1-0.30.411.31.31.10.70.1-0.5

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 (3,6,7,8)
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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.