Friday, August23, 2019 L-36.com


Marine Weather and Tides
Menlo Park, 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 6:30AMSunset 7:52PM Friday August 23, 2019 12:49 PM PDT (19:49 UTC) Moonrise 11:32PMMoonset 1:05PM Illumination 42% Phase: Third Quarter Moon; Moon at 23 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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PZZ530 San Pablo Bay, Suisun Bay, The West Delta And The San Francisco Bay North Of The Bay Bridge- 900 Am Pdt Fri Aug 23 2019
.small craft advisory in effect through this evening...
Today..SW winds 10 to 15 kt, increasing to 15 to 25 kt with gusts up to 30 kt this afternoon.
Tonight..SW winds 15 to 20 kt with gusts up to 25 kt.
Sat..SW winds 10 to 15 kt with gusts up to 25 kt.
Sat night..SW winds 10 to 15 kt.
Sun..SW winds 10 to 15 kt with gusts up to 25 kt.
Sun night..SW winds 10 to 15 kt.
Mon..SW winds 15 to 20 kt with gusts up to 25 kt.
Tue..SW winds 15 to 20 kt with gusts up to 25 kt.
PZZ500 900 Am Pdt Fri Aug 23 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Northwest winds will decrease across the area today but remain breezy over the northern outer waters. Steep northwesterly swell at 8 to 10 seconds will decrease today through the weekend with period becoming 7 to 8 seconds. Southwesterly winds are forecast over the near shore coastal waters this weekend. A moderate southerly swell will arrive on Sunday and persist through early next week with light northwesterly swell continuing through the period.


7 Day Forecast for Marine Location Near Menlo Park, CA
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location: 37.52, -122.16     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 231817
afdmtr
area forecast discussion
national weather service san francisco bay area
1117 am pdt Fri aug 23 2019

Synopsis A shallow marine layer along the coast with onshore
winds will bring seasonable temperatures to the bay area today.

High pressure begins to strengthen and rebuild over the state this
weekend allowing for inland areas to warm back into the 90s.

Milder conditions will persist near the coast with a shallow
marine layer. The ridge will weaken slightly by Tuesday and
Wednesday as the remnants of tropical storm ivo pass west of the
golden gate. This may bring some increasing clouds and more
humidity to the region.

Discussion As of 9:03 am pdt Friday... Goes-west visible
imagery reveals a mix of clouds and Sun throughout the area as
marine stratus impacts parts of our coastline. With the marine
layer generally between 500 and 1,000 ft deep, the majority of the
san francisco bay area has managed to stay clear, including
locations such as oakland, san jose, all of the interior north
bay, as well as around the san francisco airport. The only
locations in the bay area with low clouds overhead at the present
include western and northern portions of the city of san
francisco, coastal marin county, as well as parts of berkeley and
richmond. The stratus is more widespread south in the monterey bay
area with overcast conditions spanning all the way along the bay
shoreline as well south into the salinas valley past king city.

Mostly clear skies should prevail by mid-morning and beyond for
most locations (with the exception of some lingering stratus into
the afternoon along the immediate pacific coast). Present short-
term forecast package remains on track with no planned morning
update. For additional forecast details, please refer to the
previous discussion section.

Prev discussion As of 3:38 am pdt Friday... 24 hour temps and
humidity trends are noteworthy this morning with dewpoints running
5-10 degrees drier than yesterday at this time with readings back
down into the 50s while temps hover in the lower 60s. The moist
airmass has been pushed south of our region per the latest tpw
satellite scans. A more typical summertime regime is returning to
the bay area and central coast. A shallow 500-1000 foot marine
layer is hugging the coast from the golden gate southward to big
sur. Cloud bases are shallow from 400-600 feet from half moon bay
to the monterey bay region. There is steady onshore pressure
gradients in place with about 2 mb sfo to sacramento allowing the
cooler marine air to ooze inland. The 850 mb temps are around 22
celsius this afternoon which should keep the warmest inland areas
in the lower 90s while 70s 80s persist around the bay with 60s for
the beaches.

A broad 594 dm ridge is forecast to build on Saturday, extending
from the eastern pacific, across california and all the way
towards arizona. This will bring some more inland warming with mid
and upper 90s returning to the inland valleys by Sunday and Monday
as 850 mb temps warm to around 25 celsius. The surface onshore
gradients will remain fairly light with the thermal trough trying
to hug the coastline night and morning hours. Given the strength
of the ridge dont expect the marine layer to deepen too much
through the weekend and into early next week. There will likely be
bouts of morning dense fog near the coast and coastal slopes that
the marine layer covers as it gets squashed by the warm upper
ridge. Locations in the hills above 1500 feet will likely see
little night time variation with warm and dry weather persisting
day and night right through early next week.

In general the pattern the next few days looks to be fairly
typical but inland highs look to be about 4-8 degrees warmer than
normal due to the strong ridge and expected lighter afternoon
seabreezes.

Perhaps the most interesting forecast item to watch will be as the
remnants of tropical storm ivo shift northward by early next week.

The models have been fairly consistent in bringing the remnant
upper level disturbance west of the golden gate by about next
weds. We should see some increasing high clouds as early as
Tuesday night and feel some higher dewpoint air getting ushered in
under a gentle southerly flow.

Conceptually the pattern screams watch out as the tropical
remnants push north and bump up against the previously mentioned
stout upper ridge. As this occurs a mid-latitude trough will be
crossing the east pac and approaching from the northwest. This
will induce a negatively tilted upper trough. For days now the
models have been consistent in not really showing much moisture or
instability over our region. This should be viewed with some
skepticism. At this time its clear that the areas from mendocino
northward up towards mt shasta and modoc as well as much of oregon
look to see much better chances for t-storms as diffluent flow
aloft will develop. The latest 06z GFS implies a large t-storm
outbreak later weds night up near the oregon border. Will need to
watch all these trends closely in the coming days.

Aviation As of 10:56 am pdt Friday... Low clouds are quickly
clearing to the coast as a southerly surge of stratus makes a run
northward. Anticipate a return of stratus this evening and tonight
to coastal terminals as the onshore gradient increases. Confidence
is low as to the extent of the stratus intrusion overnight as the
marine layer is expected to remain shallow. Therefore have limited
cigs to mainly coastal terminals. Light onshore winds will ramp
up this afternoon to around 10 to 15 kt.

Vicinity of ksfo...VFR conditions will prevail with ifr MVFR cigs
likely to return after midnight tonight. Low confidence. Light
winds this morning becoming westerly around 15kt after 21z.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... Ifr CIGS over kmry will scatter out
between 19z and 20z this afternoon with an early return expected
between 03z-05z this evening. Light winds this morning becoming
westerly 5 to 10kt this afternoon.

Marine As of 9:00 am pdt Friday... Northwest winds will
decrease across the area today but remain breezy over the northern
outer waters. Steep northwesterly swell at 8 to 10 seconds will
decrease today through the weekend with period becoming 7 to 8
seconds. Southwesterly winds are forecast over the near shore
coastal waters this weekend. A moderate southerly swell will
arrive on Sunday and persist through early next week with light
northwesterly swell continuing through the period.

Mtr watches warnings advisories
Tday Sca... Pt arena to pigeon pt 10-60 nm
sca... Sf bay
public forecast: rowe rww
aviation: cw
marine: cw
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RTYC1 - 9414523 - Redwood City, CA 3 mi50 min WNW 8.9 G 12 71°F 75°F1010.4 hPa (+0.5)
AAMC1 - 9414750 - Alameda, CA 19 mi56 min W 4.1 G 6 69°F 71°F1010.6 hPa
LNDC1 20 mi50 min NNW 5.1 G 8 68°F 1010.2 hPa (+1.0)
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 21 mi50 min W 9.9 G 12
OBXC1 22 mi50 min 67°F 62°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 22 mi50 min NW 9.9 G 11 65°F 1010.2 hPa (+0.8)
PXOC1 - 9414311 - San Francisco (Pier 1), CA 23 mi50 min WSW 5.1 G 12 67°F 1009.3 hPa (+1.1)
PXSC1 23 mi50 min 68°F 60°F
FTPC1 - 9414290 - San Francisco, CA 26 mi56 min WSW 14 G 19 62°F 64°F1010.8 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 29 mi56 min SW 9.9 G 16 64°F 1010.8 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 30 mi45 min SW 12 64°F 1010 hPa
46237 - San Francisco Bar, CA (142) 31 mi50 min 60°F5 ft
RCMC1 - 9414863 - Richmond, CA 31 mi50 min 67°F
UPBC1 36 mi50 min WNW 13 G 19
MZXC1 - 9415102 - Martinez-Amorco CA 36 mi50 min NW 19 G 21 73°F 73°F1008.6 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 37 mi50 min WSW 17 G 20 67°F 1009.2 hPa (+0.8)
PCOC1 - 9415144 - Port Chicago, CA 38 mi50 min W 14 G 17 74°F 72°F1008.7 hPa (+0.3)
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 39 mi40 min S 14 G 18 59°F 59°F1011.6 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 39 mi50 min NW 11 G 15 77°F 1007.8 hPa
SFXC1 - San Francisco Bay Reserve, CA 48 mi65 min WNW 12 81°F 1008 hPa62°F

Wind History for Redwood City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Palo Alto Airport, CA3 mi2 hrsN 710.00 miClear72°F62°F73%1009.8 hPa
San Carlos Airport, CA5 mi63 minW 810.00 miClear73°F59°F61%1010.2 hPa
Mountain View, Moffett Field, CA9 mi1.9 hrsN 410.00 miFair76°F62°F62%1009.8 hPa
Hayward, Hayward Air Terminal, CA10 mi1.9 hrsW 610.00 miFair72°F61°F68%1010.5 hPa
Oakland, Metro Oakland International Airport, CA13 mi1.9 hrsW 710.00 miA Few Clouds72°F59°F64%1010 hPa
San Francisco, San Francisco International Airport, CA13 mi1.9 hrsNE 510.00 miA Few Clouds71°F60°F68%1009.6 hPa
San Jose, San Jose International Airport, CA16 mi1.9 hrsSE 910.00 miA Few Clouds77°F59°F54%1009.2 hPa
Half Moon Bay Airport, CA18 mi75 minS 11 G 186.00 miFog/Mist63°F57°F83%1011.8 hPa
Livermore, Livermore Municipal Airport, CA22 mi1.9 hrsWSW 610.00 miFair82°F60°F47%1008.3 hPa
San Jose / Reid / Hillv, CA22 mi60 minS 810.00 miClear82°F60°F48%1009.5 hPa

Link to 5 minute data for KPAO

Wind History from PAO (wind in knots)
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Last 24hrNW8N12NW12NW14----------------------------CalmCalmN4N4N7N9
1 day agoN10N12N15
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N12----------------------------------------
2 days ago--N15N18
G22
--NW16NW14
G20
--NW10----------------------33NE544

Tide / Current Tables for Redwood Creek, C.M. No.8, San Francisco Bay, California
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Redwood Creek
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Fri -- 12:47 AM PDT     1.84 feet Low Tide
Fri -- 06:31 AM PDT     Sunrise
Fri -- 07:11 AM PDT     5.59 feet High Tide
Fri -- 07:58 AM PDT     Last Quarter
Fri -- 12:23 PM PDT     2.96 feet Low Tide
Fri -- 02:05 PM PDT     Moonset
Fri -- 06:28 PM PDT     7.66 feet High Tide
Fri -- 07:50 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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21.92.233.94.75.35.65.44.94.13.4333.64.7677.67.675.94.53.2

Tide / Current Tables for Dumbarton Bridge, San Francisco Bay, California Current
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Dumbarton Bridge
Click for Map
Fri -- 01:28 AM PDT     0.00 knots Slack
Fri -- 04:43 AM PDT     1.13 knots Max Flood
Fri -- 06:31 AM PDT     Sunrise
Fri -- 07:58 AM PDT     Last Quarter
Fri -- 08:52 AM PDT     -0.00 knots Slack
Fri -- 10:38 AM PDT     -0.44 knots Max Ebb
Fri -- 12:40 PM PDT     0.00 knots Slack
Fri -- 02:04 PM PDT     Moonset
Fri -- 04:44 PM PDT     1.11 knots Max Flood
Fri -- 07:50 PM PDT     Sunset
Fri -- 08:13 PM PDT     -0.00 knots Slack
Fri -- 11:09 PM PDT     -1.08 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.6-0.20.20.711.10.90.70.3-0.1-0.4-0.4-0.20.10.40.711.10.90.50.1-0.4-0.8-1.1

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 (15,3,4,5)
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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.