Friday, April20, 2018 L-36.com


Marine Weather and Tides
Sausalito, CA

Version 3.4
What's New / NOTES
3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.

Sunrise 6:24AMSunset 7:52PM Friday April 20, 2018 11:37 AM PDT (18:37 UTC) Moonrise 9:17AMMoonset 12:00AM Illumination 29% Phase: Waxing Crescent; Moon at 5 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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PZZ531 San Francisco Bay South Of The Bay Bridge- 851 Am Pdt Fri Apr 20 2018
Today..W winds 5 kt...increasing to 5 to 15 kt in the afternoon.
Tonight..W winds 10 to 20 kt.
Sat..W winds 5 to 15 kt.
Sat night..W winds 5 to 15 kt.
Sun..W winds 10 to 20 kt.
Mon..N winds 10 kt...becoming sw.
Tue..SW winds 10 kt.
PZZ500 851 Am Pdt Fri Apr 20 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Northwest winds will increase this afternoon over the coastal waters as high pressure remains over the eastern pacific. These winds will generate steep wind waves and fresh swell, resulting in hazardous seas into the weekend.

7 Day Forecast for Marine Location Near Sausalito, CA
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location: 37.8, -122.5     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 201739
afdmtr
area forecast discussion
national weather service san francisco bay area
1039 am pdt Fri apr 20 2018

Synopsis A warmer trend and dry weather are forecast through
the upcoming weekend. A weak cutoff low approaches the state after
midweek.

Discussion As of 08:52 am pdt Friday... Morning visible
satellite shows a taste of summer - low clouds and patchy fog
hugging the coast from big sur to point reyes with a slight
intrusion into the monterey bay salinas valley. Did a quick update
this morning to better reflect reality with cloud cover this
morning.

Otherwise, should be a nice end to the work week with sunny skies
this afternoon and warmer temperatures. Temperatures today will
be a few warmer than Thursday and even a few above normal for late
april. Highs 60s coast and 70s inland.

Prev discussion As of 3:33 am pdt Friday... Satellite imagery shows
mostly clear skies across the district except for some low clouds
over the ocean starting to touch the coast along the san francisco
peninsula as well as near monterey and north of point sur.

Temperatures are generally warmer than they were 24 hours ago with
readings in the mid 40s to the lower 50s. Highs today are
expected to warm into the 60s and 70s.

High pressure aloft is forecast to build in over the state during
the weekend resulting in warmer temperatures with highs across
inland areas reaching the mid 80s by Saturday. A weak upper
trough is progged to brush across northern california on Sunday
for slight cooling, mainly across the north bay area. Slight
cooling to extend across the remainder of the district by Monday.

Medium range models continue to indicate a cutoff low forming
off the california coast around the middle of next week. The
solutions vary regarding the position of cutoff low as well as
when it tracks inland. Most likely impacts will be in increasing
marine layer and onshore flow, thus cooler temperatures. The
possibility of showers as the trough tracks inland exists, but
confidence is low.

Aviation As of 10:39 am pdt Friday for 18z tafs. Latest
visible satellite shows the stratus deck deteriorating and pulling
away from the central california bay area coastline. Thus,VFR,
with mainly clear skies, will prevail through the afternoon at all
terminals. West winds are expected to increase this afternoon,
generally sustained around 10-15 kt across the district. Hi-res
models and guidance suggest another push of stratus tonight along
the immediate monterey bay coast. Overall medium confidence.

Vicinity of ksfo...VFR expected through the TAF period. Light
offshore winds in the morning will increase and turn onshore in
the afternoon and evening to around 20 kt. Winds are forecast to
diminish after sunset. With a weak onshore gradient expected
overnight, no threat of stratus developing around the terminal
at this time, but will monitor conditions and forecast guidance
closely through the day.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... Skies have cleared nicely at kmry and
ksns andVFR is expected through the rest of the day. Models hint
at low clouds developing again tonight, but confidence remains
low with regards to timing and coverage. Light to moderate onshore
winds anticipated this afternoon.

Marine As of 8:51 am pdt Friday... Northwest winds will
increase this afternoon over the coastal waters as high pressure
remains over the eastern pacific. These winds will generate steep
wind waves and fresh swell, resulting in hazardous seas into the
weekend.

Mtr watches warnings advisories
Tday Sca... Pigeon pt to pt pinos 0-10 nm
sca... Pt arena to pt reyes 0-10 nm
sca... Pt reyes to pigeon pt 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
public forecast: mm sims
aviation: bam
marine: bam
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FTPC1 - 9414290 - San Francisco, CA 2 mi55 min WNW 7 G 11 54°F 56°F1022.7 hPa
PXSC1 5 mi49 min 56°F 53°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 6 mi49 min N 2.9 G 4.1 55°F 1021.5 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 7 mi56 min SE 6 57°F 1022 hPa
46237 - San Francisco Bar, CA (142) 7 mi67 min 55°F6 ft
OBXC1 8 mi49 min 57°F 51°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 9 mi49 min NW 2.9 G 2.9 57°F 1022.4 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 9 mi49 min W 2.9 G 2.9
RCMC1 - 9414863 - Richmond, CA 10 mi55 min SSE 6 G 8 56°F 57°F1022.2 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 10 mi49 min S 5.1 G 8 56°F 1022.7 hPa
AAMC1 - 9414750 - Alameda, CA 11 mi55 min SE 2.9 G 2.9 57°F 60°F1022.4 hPa
LNDC1 12 mi49 min WSW 1 G 1.9 58°F 1022.3 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 18 mi47 min NNW 5.8 G 5.8 51°F 53°F6 ft1022.8 hPa (+0.6)
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 22 mi49 min NW 5.1 G 6 59°F 1022 hPa
RTYC1 - 9414523 - Redwood City, CA 25 mi49 min N 1.9 G 2.9 61°F 61°F1022.7 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 26 mi49 min NW 9.9 G 11 61°F 59°F1021.9 hPa57°F
PRYC1 - 9415020 - Point Reyes, CA 29 mi49 min E 2.9 G 4.1 53°F1022.4 hPa
PCOC1 - 9415144 - Port Chicago, CA 30 mi49 min W 8 G 8.9 62°F 59°F1021.7 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 36 mi55 min NNW 4.1 G 5.1 65°F 1021.6 hPa
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 36 mi47 min NW 12 G 16 53°F 54°F7 ft1022.8 hPa (+0.9)
SFXC1 - San Francisco Bay Reserve, CA 37 mi112 min SW 2.9 64°F 1022 hPa50°F

Wind History for San Francisco, CA
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Francisco, San Francisco International Airport, CA14 mi1.7 hrsENE 410.00 miFair58°F48°F72%1022.3 hPa
Oakland, Metro Oakland International Airport, CA16 mi44 minSW 410.00 miFair58°F50°F75%1022.6 hPa
Half Moon Bay Airport, CA20 mi42 minSW 54.00 miFog/Mist52°F48°F88%1023.4 hPa
Hayward, Hayward Air Terminal, CA22 mi43 minVar 310.00 miFair63°F46°F56%1023.2 hPa
San Carlos Airport, CA23 mi50 minVar 310.00 miClear63°F51°F68%1022.3 hPa
Novato / Gnoss Field, CA24 mi62 minN 010.00 miFair63°F48°F60%1022 hPa

Wind History from SFO (wind in knots)
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Last 24hrW19W21
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W19W18W9W9W7NW3CalmW3W6W3CalmCalmW4CalmCalmNE4NE4
1 day agoW5W12W13W13W11W6W11W8W6W8W9W6NW8NW7W9W8W6W8W5W6W6W9W13W16
2 days agoCalmCalmN4N5NW14W16W17W16W15W13W8W11W6W8W10W8W7W9W8W5W12W10W8W11

Tide / Current Tables for San Francisco, California
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San Francisco
Click for Map
Fri -- 12:01 AM PDT     Moonset
Fri -- 02:52 AM PDT     5.83 feet High Tide
Fri -- 06:27 AM PDT     Sunrise
Fri -- 09:37 AM PDT     -0.71 feet Low Tide
Fri -- 10:16 AM PDT     Moonrise
Fri -- 05:03 PM PDT     4.43 feet High Tide
Fri -- 07:50 PM PDT     Sunset
Fri -- 09:41 PM PDT     2.64 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
4.255.65.85.44.531.40.1-0.6-0.7-0.20.61.62.63.54.24.44.23.73.12.72.73

Tide / Current Tables for San Francisco Bay Entrance (Golden Gate), California Current
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San Francisco Bay Entrance (Golden Gate)
Click for Map
Fri -- 12:01 AM PDT     Moonset
Fri -- 01:53 AM PDT     2.39 knots Max Flood
Fri -- 04:32 AM PDT     -0.00 knots Slack
Fri -- 06:27 AM PDT     Sunrise
Fri -- 08:06 AM PDT     -4.63 knots Max Ebb
Fri -- 10:16 AM PDT     Moonrise
Fri -- 11:57 AM PDT     0.01 knots Slack
Fri -- 03:02 PM PDT     3.37 knots Max Flood
Fri -- 06:40 PM PDT     -0.01 knots Slack
Fri -- 07:50 PM PDT     Sunset
Fri -- 08:49 PM PDT     -2.11 knots Max Ebb
Fri -- 11:56 PM PDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.22.12.41.90.7-0.7-2.3-3.9-4.6-4.2-2.9-1.50.11.62.93.43.12.21-0.5-1.8-2.1-1.6-0.8

Weather Map and Satellite Images
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wmap_P
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 (14,3,4,5)
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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.