Friday, June23, 2017 L-36.com


Marine Weather and Tides
Santa Clara, CA

Version 3.4
What's New / NOTES
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.

Sunrise 5:46AMSunset 8:33PM Friday June 23, 2017 3:09 AM PDT (10:09 UTC) Moonrise 4:35AMMoonset 7:13PM Illumination 1% Phase: New Moon; Moon at 29 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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PZZ560 Pigeon Point To Point Pinos To 10 Nm- 850 Pm Pdt Thu Jun 22 2017
Tonight..S winds 5 to 15 kt. Wind waves 1 to 3 ft. Mixed swell nw 4 to 6 ft at 11 seconds and S 3 ft at 14 seconds. Patchy fog after midnight.
Fri..S winds 5 to 15 kt. Wind waves 1 to 3 ft. Mixed swell nw 4 to 6 ft at 10 seconds and S 3 ft at 14 seconds. Patchy fog in the morning.
Fri night..SW winds 5 to 10 kt. Wind waves 2 ft or less. NW swell 3 to 5 ft at 10 seconds. Patchy fog after midnight.
Sat..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 3 to 4 ft at 10 seconds. Patchy fog in the morning.
Sat night..NW winds 10 to 20 kt. Wind waves 2 to 4 ft. NW swell 3 ft at 10 seconds.
Sun..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 3 ft.
Mon..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 3 ft.
Tue..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 3 ft.
PZZ500 850 Pm Pdt Thu Jun 22 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... A weak surface low offshore will maintain light southerly winds over the coastal waters through Friday. However, moderate and gusty seabreeze winds are expected during the afternoon and evening hours around the golden gate and angel island. Winds over the coastal waters will shift to the west and northwest on Saturday and then increase on Sunday. Seas will subside through the remainder of the week and into the weekend.

7 Day Forecast for Marine Location Near Santa Clara, CA
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location: 37.38, -121.9     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 230600
afdmtr
area forecast discussion
national weather service san francisco bay area
1100 pm pdt Thu jun 22 2017

Hot and dry conditions will continue through Friday...

Synopsis Heat advisories is now in place through 9 pm Friday
for dangerously hot temperatures over the interior and hills. A
shallow marine layer along the central coast will keep the
monterey bay coastal areas much cooler. Temperatures will still be
hot across the interior for Friday, just not as hot as this
afternoon. Additional cooling will occur over the weekend.

Discussion As of 8:59 pm pdt Thursday... Temperatures have cool
slightly from their peak this afternoon however current reading
continue to show inland temperatures in the 90s with a few
locations still over 100 degrees. At 9 pm this evening the
excessive heat warming will be allowed to expire and will be
replace by a heat advisory over the interior portions of the east
bay, santa clara county, as well as, the mountains of monterey and
san benito county.

Temperatures finished off the day in the 80s and 90 across much of
the region with warmest inland temperatures topping out anywhere
from 100 to 109. Our warmest readings today were livermore fire
department, pinnacles and bradley that all shared the honors of
reaching 109 degrees. Climatologically speaking temperatures were
anywhere from 15 to 25 degrees above normal for today however no
record were broken. A return of the onshore flow and a
redeveloping albeit shallow marine layer kept temperatures from
breaking out of the 70s along the immediate coast.

Cooler temperatures are in store for Friday and into the weekend
as the upper level ridge of high pressure, that has brought us
this heat wave, shift east as an upper level trough approaches
from the west. As a cooler airmass approaches the area, onshore
flow strengthens and the marine layer gradually deepens,
temperatures should gradually cool around 10 degrees on Friday.

While cooler temperatures are in the forecast Friday a heat risk
still exists across the interior portions of the east bay, santa
clara county and the mountain of san benito and monterey counties.

Please continue to take precaution as children, the elderly and
pets are very sensitive to extreme heat and dehydration. Also with
the high Sun angle sunburns and Sun poisoning are risks that can
be prevented with sunscreen, hats, and appropriate clothing.

From previous discussion... On Saturday temperatures will perhaps
drop another few degrees as an upper level low begins to nudge
toward the california coast. There could be some mid upper-level
moisture that advects from the south southeast that may bring
isolated thunder to our east in the sierra nevada. Probability of
precipitation may have to increase over our area if future model
runs continue to push the moisture toward the central coast.

Early next week the upper low will push onshore and help to
flatten the desert southwest ridge. Temperatures will finally
return closer to normal with highs back to low 80s to low 90s for
the interior east bay and south bay. There is even the possibility
that areas could be several degrees below normal by Tuesday.

Again, going back to today, dangerously hot weather is here for
locations away from the coast. While a much welcomed cool down is
will begin tomorrow, temperatures will still be elevated enough to
present heat impacts, especially to those sensitive to the heat.

Take the necessary precautions to beat the heat: drink plenty of
fluids, limit outdoor activity during the hottest time of the
day, wear light-colored clothing, put on a hat. If you don't have
air conditioning, consider going to a community cooling center, a
shopping center mall, or movie theater. If you're parked in the
shade, or even if you're at the coast with outdoor temperatures in
the 60s: never leave children, pets, or adults alone in a parked
vehicle. Stay safe, stay hydrated, and beat the heat.

Aviation As of 10:55 pm pdt Thursday... For 06z tafs.

Widespread low clouds and fog have developed along the coastline
and was beginning to move inland by late Thursday evening as the
marine layer deepens. Expect ifr lifr conditions at coastal taf
sites overnight, but there there is uncertainty as to whether low
ceilings will develop around san francisco bay. Clearing is
expected in most locations by 18z Friday. Low clouds will likely
will develop earlier on Friday evening.

Moderate forecast confidence except low confidence on ceilings
overnight at ksfo.

Vicinity of ksfo... Scattered low clouds expected overnight, but
a southerly component to the low level flow should help keep ksfo
vfr overnight. Ifr ceilings more likely to develop at koak than
ksfo late tonight and into Friday morning. Light westerly winds
overnight, becoming moderate on Friday afternoon.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... Ifr lifr ceilings overnight and into
Friday morning with areas of MVFR vsbys. Clearing expected by
17-18z Friday. Light winds.

Fire weather As of 9:00 pm pdt Thursday... Although onshore
flow has returned, the marine layer will remain shallow and the
airmass aloft will remain very warm for a few more days. Thus,
conditions in the hills will only gradually improve from Friday
through the weekend. Much improved conditions are expected by
early next week.

Climate
Here is a list of record high temperatures
sf bay area Thursday
location... ... ... ... ... ..Temp year
kentfield... ... ... ... ... .102 1989
san rafael... ... ... ... ... .99 2006
napa... ... ... ... ... ... ... 105 1981
san francisco... ... ... ... .97 1989
sfo airport... ... ... ... ... 98 1989
oakland airport... ... ... ..94 1957
richmond... ... ... ... ... ... 94 1989
livermore... ... ... ... ... .110 1961
moffett field... ... ... ... .99 1989
san jose... ... ... ... ... ..101 1989
gilroy... ... ... ... ... ... .110 1973
monterey bay area Thursday
location... ... ... ... .. Temp year
salinas... ... ... ... ... ... .89 1981
salinas airport... ... ... ..92 1947
king city... ... ... ... ... .110 1929

Marine As of 8:50 pm pdt Thursday... A weak surface low
offshore will maintain light southerly winds over the coastal
waters through Friday. However, moderate and gusty seabreeze winds
are expected during the afternoon and evening hours around the
golden gate and angel island. Winds over the coastal waters will
shift to the west and northwest on Saturday and then increase on
Sunday. Seas will subside through the remainder of the week and
into the weekend.

Mtr watches warnings advisories
Tngt Heat advisory... Caz510-511-517-518
sca... Sf bay until 11 pm
public forecast: cw
aviation: dykema
marine: bam
fire weather: rww
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RTYC1 - 9414523 - Redwood City, CA 19 mi52 min NNW 5.1 G 7 63°F 75°F1009.4 hPa
AAMC1 - 9414750 - Alameda, CA 34 mi52 min WNW 4.1 G 7 59°F 65°F1010.6 hPa
LNDC1 35 mi52 min NNW 5.1 G 6 58°F 1010.2 hPa
OBXC1 37 mi52 min 57°F 57°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 37 mi52 min W 9.9 G 14
OKXC1 - 9414776 - Oakland (Berth 34), CA 38 mi52 min W 8 G 11 57°F 1010.2 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 39 mi52 min WSW 5.1 G 11 56°F 1009.1 hPa
PXSC1 39 mi52 min 57°F 57°F
ELXC1 - Elkhorn Slough Reserve, CA 40 mi85 min NNW 7 55°F 1010 hPa55°F
FTPC1 - 9414290 - San Francisco, CA 42 mi52 min S 1.9 G 6 55°F 55°F1010.5 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 44 mi52 min SSW 5.1 G 7 59°F 1010.5 hPa
46092 - MBM1 44 mi63 min SSE 12 54°F 55°F1010.6 hPa (+0.0)
RCMC1 - 9414863 - Richmond, CA 46 mi52 min WSW 5.1 G 8.9 58°F 61°F1010 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 46 mi63 min NW 2.9 57°F 1010 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 46 mi52 min WNW 18 G 23 69°F 1007.2 hPa
UPBC1 47 mi52 min WNW 16 G 20
MZXC1 - 9415102 - Martinez-Amorco CA 47 mi52 min W 14 G 16 66°F 68°F1009.3 hPa57°F
PCOC1 - 9415144 - Port Chicago, CA 47 mi52 min W 18 G 22 66°F 72°F1008.5 hPa
46237 - San Francisco Bar, CA (142) 48 mi100 min 55°F5 ft

Wind History for Redwood City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Jose, San Jose International Airport, CA2 mi77 minESE 610.00 miFair66°F57°F73%1009.7 hPa
Mountain View, Moffett Field, CA9 mi74 minW 310.00 miFair66°F61°F84%1010.3 hPa
San Carlos Airport, CA21 mi75 minN 410.00 miFair63°F59°F88%1010.2 hPa
Livermore, Livermore Municipal Airport, CA23 mi77 minWNW 610.00 miFair67°F55°F66%1008.3 hPa
Hayward, Hayward Air Terminal, CA23 mi76 minNW 510.00 miFair62°F53°F73%1010.7 hPa

Wind History from SJC (wind in knots)
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Last 24hrCalmCalmNW5Calm3CalmCalmCalmNW4NW7NW9W10W11NW11W12NW11W11W7W7W4W3CalmSE6SE6
1 day agoCalmSE6SE7SE7SE55CalmE6CalmCalmN4NW8W12NW16NW12W7W5W5NW53CalmCalmSE3W5
2 days agoNW4CalmW4NW5W44CalmSE5NW7NW9W10W13NW13NW13NW11NW11NW8NW10NW9NW6NW5NW4N3NW3

Tide / Current Tables for Gold Street Bridge, Alviso Slough, San Francisco Bay, California
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Gold Street Bridge
Click for Map
Fri -- 05:35 AM PDT     Moonrise
Fri -- 05:47 AM PDT     Sunrise
Fri -- 07:53 AM PDT     -1.46 feet Low Tide
Fri -- 01:45 PM PDT     8.21 feet High Tide
Fri -- 07:32 PM PDT     New Moon
Fri -- 07:37 PM PDT     2.09 feet Low Tide
Fri -- 08:13 PM PDT     Moonset
Fri -- 08:32 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
11.510.99.57.34.72.10.1-1.1-1.5-0.51.43.86.17.88.27.56.24.63.12.32.23.86.59.3

Tide / Current Tables for Dumbarton Point 2.3 mi NE, South San Francisco Bay, California Current
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Dumbarton Point 2.3 mi NE
Click for Map
Fri -- 12:15 AM PDT     -0.00 knots Slack
Fri -- 05:01 AM PDT     -1.79 knots Max Ebb
Fri -- 05:35 AM PDT     Moonrise
Fri -- 05:48 AM PDT     Sunrise
Fri -- 07:43 AM PDT     0.01 knots Slack
Fri -- 10:29 AM PDT     1.89 knots Max Flood
Fri -- 01:53 PM PDT     -0.00 knots Slack
Fri -- 05:37 PM PDT     -0.91 knots Max Ebb
Fri -- 07:32 PM PDT     New Moon
Fri -- 07:34 PM PDT     0.00 knots Slack
Fri -- 08:13 PM PDT     Moonset
Fri -- 08:33 PM PDT     Sunset
Fri -- 10:11 PM PDT     1.43 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.2-0.4-0.9-1.4-1.7-1.8-1.5-0.70.31.31.81.81.50.8-0-0.4-0.7-0.9-0.9-0.40.311.41.3

Weather Map and Satellite Images
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Weather Map
wmap_P
IR Satellite Image from GEOS
west_satellite

GOES Local Image of CentralWestCoast    EDIT
Geos

Wind Forecast for San Francisco/Monterey Bay Area, CA (6,6,7,8)
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Ground Weather Radar Station San Francisco Bay Area, CA
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weather_mapweather_map weather_map

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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.