Friday, June23, 2017 L-36.com


Marine Weather and Tides
Pescadero, 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 5:47AMSunset 8:33PM Friday June 23, 2017 3:15 AM PDT (10:15 UTC) Moonrise 4:37AMMoonset 7:14PM 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- 308 Am Pdt Fri Jun 23 2017
Today..S winds 5 to 15 kt. Wind waves 1 to 3 ft. Mixed swell nw 4 to 5 ft at 10 seconds and S 3 ft at 14 seconds. Patchy fog in the morning.
Tonight..W winds 10 kt. Wind waves 2 ft or less. NW swell 3 to 4 ft at 10 seconds. Patchy fog after midnight.
Sat..W winds 10 kt...becoming nw 10 to 20 kt in the afternoon. Wind waves 2 ft or less...becoming 3 to 4 ft in the afternoon. NW swell 3 ft at 9 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 9 seconds.
Sun..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 3 ft at 8 seconds.
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 308 Am Pdt Fri Jun 23 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Generally light southerly winds over the coastal waters today. Onshore winds increase later today and tonight through coastal gaps such as the golden gate gap and across the northern san francisco bay. Northwest winds return this weekend. Generally decreasing seas through the coming days.

7 Day Forecast for Marine Location Near Pescadero, CA
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location: 37.18, -122.39     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 24 mi45 min NNW 5.1 G 7 62°F 75°F1009.5 hPa
46042 - MONTEREY - 27NM West of Monterey Bay, CA 27 mi85 min 56°F 54°F8 ft1010.6 hPa (+0.0)
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 29 mi85 min SSE 14 G 18 56°F 55°F6 ft1009.7 hPa (+0.0)
46114 - West Monterey Bay, CA 32 mi45 min 55°F7 ft
46092 - MBM1 35 mi68 min SSE 12 54°F 55°F1010.6 hPa (+0.0)
AAMC1 - 9414750 - Alameda, CA 41 mi45 min WNW 4.1 G 5.1 59°F 65°F1010.7 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 43 mi45 min W 11 G 13
PXOC1 - 9414311 - San Francisco (Pier 1), CA 43 mi51 min WSW 6 G 12 56°F 1009.1 hPa
PXSC1 43 mi45 min 56°F 56°F
OBXC1 43 mi45 min 57°F 57°F
FTPC1 - 9414290 - San Francisco, CA 43 mi45 min W 4.1 G 8.9 55°F 55°F1010.6 hPa
LNDC1 43 mi45 min NNW 4.1 G 7 59°F 1010.2 hPa
ELXC1 - Elkhorn Slough Reserve, CA 43 mi90 min NNW 7 55°F 1010 hPa55°F
46237 - San Francisco Bar, CA (142) 44 mi45 min 56°F5 ft
OKXC1 - 9414776 - Oakland (Berth 34), CA 44 mi45 min W 7 G 8.9 57°F 1010.2 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 46 mi85 min S 9.7 G 12 55°F 55°F5 ft1010.5 hPa (+0.5)
46240 - Cabrillo Point, Monterey Bay, CA (158) 46 mi54 min 58°F2 ft
MEYC1 48 mi45 min ENE 5.1 G 7 54°F 60°F1011.6 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 49 mi53 min NW 1.9 57°F 1010 hPa

Wind History for Redwood City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure

Wind History from PAO (wind in knots)
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Last 24hr------------------CalmNW6--N7N8N8NW9NW10NW15N16--NW18--NW10NW15
1 day ago------------------N6N6NE6N5--N5N8NW8NW15NW13--N10N8NW8NW8
2 days ago------------------NW5NW8N8NE66NW8N9--NW12N16N17N15N18--NW13

Tide / Current Tables for Ano Nuevo Island, California
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Ano Nuevo Island
Click for Map
Fri -- 04:28 AM PDT     -1.62 feet Low Tide
Fri -- 05:37 AM PDT     Moonrise
Fri -- 05:50 AM PDT     Sunrise
Fri -- 11:18 AM PDT     4.22 feet High Tide
Fri -- 04:12 PM PDT     2.08 feet Low Tide
Fri -- 07:32 PM PDT     New Moon
Fri -- 08:14 PM PDT     Moonset
Fri -- 08:33 PM PDT     Sunset
Fri -- 10:08 PM PDT     6.28 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.92.20.4-0.9-1.6-1.5-0.90.21.42.73.74.24.13.632.42.12.33455.96.36

Tide / Current Tables for Half Moon Bay, California
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Half Moon Bay
Click for Map
Fri -- 04:42 AM PDT     -1.51 feet Low Tide
Fri -- 05:37 AM PDT     Moonrise
Fri -- 05:49 AM PDT     Sunrise
Fri -- 11:36 AM PDT     4.62 feet High Tide
Fri -- 04:26 PM PDT     2.19 feet Low Tide
Fri -- 07:32 PM PDT     New Moon
Fri -- 08:15 PM PDT     Moonset
Fri -- 08:34 PM PDT     Sunset
Fri -- 10:26 PM PDT     6.69 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
4.72.91.1-0.5-1.3-1.5-0.90.11.32.63.84.54.64.13.42.72.22.32.93.9566.66.6

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.