Tuesday, August21, 2018 L-36.com


Marine Weather and Tides
Pescadero, CA

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Sunrise 6:29AMSunset 7:52PM Tuesday August 21, 2018 8:50 AM PDT (15:50 UTC) Moonrise 3:58PMMoonset 1:15AM Illumination 77% Phase: Waxing Gibbous; Moon at 10 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- 253 Am Pdt Tue Aug 21 2018
Today..SW winds 10 kt. Wind waves 2 ft or less. NW swell 3 to 4 ft at 10 seconds. Patchy fog.
Tonight..SW winds 10 kt. Wind waves 2 ft or less. W swell 3 to 4 ft at 12 seconds. Patchy fog after midnight.
Wed..SW winds 10 kt. Wind waves 2 ft or less. W swell 3 to 4 ft at 12 seconds. Patchy fog in the morning.
Wed night..W winds 10 kt. Wind waves 2 ft or less. NW swell 3 to 4 ft at 11 seconds. Patchy fog after midnight.
Thu..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 3 to 5 ft at 11 seconds. Patchy fog.
Fri..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 5 to 7 ft. Patchy fog.
Sat..NW winds 10 to 20 kt. Wind waves 2 to 4 ft. NW swell 5 to 7 ft. Patchy fog.
PZZ500 253 Am Pdt Tue Aug 21 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... A weak pressure gradient across the region will maintain generally light west to northwesterly winds over the coastal waters through much of the week. Winds will increase over the northern waters late in the week and into the weekend.


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 211533
afdmtr
area forecast discussion
national weather service san francisco bay area
833 am pdt Tue aug 21 2018

Synopsis A cooling trend will continue today as an upper level
trough and deep marine layer impacts the region. Temperatures will
then rebound to near seasonal averages late in the week. Coastal
clouds will likely persist and penetrate inland each night.

Discussion As of 08:33 am pdt Tuesday... Satellite imagery
showing widespread stratus across the region as the marine layer
remains above 2000 ft. Persistent overnight cloud cover has kept
temperatures this morning close to this time yesterday. Another
late morning early afternoon burn off is expected with lingering
clouds near the immediate coast. This coupled with onshore flow
and an upper trough across northern california will allow for
continued cooling across the region today. Expect afternoon highs
along the coast in the upper 50s to low mid 60s and 80s inland.

Isolated locations across the interior will reach the low 90s.

Overall, temperatures are forecast to be around 5 to 10 degrees
below seasonal normals. Latest run of the hrrr smoke model still
suggests that portions of the region today will be impacted by
smoke from ongoing wildfires, particularly for the north bay and
san francisco bay areas. No updates needed to the forecast at this
time. For additional details please refer to the previous
discussion below.

Prev discussion As of 03:36 am pdt Tuesday... A 2,000+ foot
marine layer continues to result in widespread cloud cover over
the region this morning. Most inland valley locations and just
about all urban areas are now under a solid cloud deck with
temperatures holding in the 50s. Should see these clouds mix out
over the interior late this morning into the early with lingering
cloud possible near the coast. All of this is a result of a
mid upper level low center over idaho and associated trough
stretched across northern california. Thus, expecting additional
cooling region- wide today compared to yesterday with upper 50s to
lower 60s at the coast to 80s inland. Only a few of the warmest
interior locations will reach into the lower 90s this afternoon.

Smoke in the atmosphere from ongoing wildfires across the state
will also impact portions of the region again today, especially
over the san francisco bay area and locations northward.

Expect temperatures to rebound a bit by Wednesday and through late
week as the aforementioned trough lifts to the northeast. This will
allow for high pressure over the desert southwest to strengthen
slightly as well. However, a broad mid upper level trough is
forecast to linger over british columbia and prevent the ridge from
strengthening too much over our region. Thus, look for temperatures
to remain near seasonal averages through late week and potentially
even into the upcoming weekend. With this, do expect the marine
layer to hold steady around 1,500 feet or so through the forecast
period with night morning coastal clouds penetrating inland each
night.

At this time, medium range guidance as well as the cpc's 6-10 and 8-
14 day outlooks continue to show no significant changes in the upper
level pattern through the end of the month. Thus, look for near
normal temperatures to persist along with generally dry weather
conditions.

Aviation As of 4:53 am pdt Tuesday... Low clouds have
infiltrated well inland this morning under a deep 2700 ft marine
layer. Confidence is low with respect to clearing times as the
marine layer has deepened significantly overnight. Will likely
have to push back clearing times at some terminals. Also of
concern will be the smoke. The latest hrrr model run depicts smoke
across the bay area today which will lead to reduced slant range
and horizontal vsbys. Otherwise light winds will prevail through
the morning with moderate onshore flow expected through the
afternoon.

Vicinity of ksfo... Ifr CIGS will persist through the morning
hours. Stratus is expected to clear to the coast this afternoon
however confidence is low. There is a chance that this may be an
all day stratus event as the marine layer continues to deepen.

Smoke may reduced slant range and horizontal vsbys over area
terminals this week.

Sfo bridge approach... Moderate to poor slant range visibility for
the period. Otherwise similar to ksfo.

Monterey bay terminals... Ifr CIGS will persist through the morning
hours. Stratus is expected to clear to the coast around 18z this
morning however confidence is low. Any clearing this afternoon
may be short-lived with CIGS expected to return once again by 03z.

Smoke may reduced slant range and horizontal vsbys over area
terminals this week.

Marine As of 2:53 am pdt Tuesday... A weak pressure gradient
across the region will maintain generally light west to
northwesterly winds over the coastal waters through much of the
week. Winds will increase over the northern waters late in the
week and into the weekend.

Mtr watches warnings advisories
Tday None.

Public forecast: rgass
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 24 mi33 min WSW 8.9 G 12 60°F 72°F1015.7 hPa
46042 - MONTEREY - 27NM West of Monterey Bay, CA 27 mi61 min SE 1.9 G 3.9 56°F 58°F4 ft1014.8 hPa (+0.9)
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 29 mi61 min SSE 7.8 G 9.7 57°F 58°F4 ft1015 hPa (+0.8)
46114 - West Monterey Bay, CA 32 mi51 min 58°F4 ft
46092 - MBM1 35 mi46 min SSW 25 57°F 58°F1015.1 hPa (+1.0)
AAMC1 - 9414750 - Alameda, CA 41 mi51 min WSW 7 G 9.9 58°F 67°F1015.3 hPa (+1.1)
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 43 mi45 min WSW 8 G 9.9
PXOC1 - 9414311 - San Francisco (Pier 1), CA 43 mi33 min W 5.1 G 7 57°F 1014.2 hPa
PXSC1 43 mi45 min 59°F 56°F
OBXC1 43 mi45 min 58°F 56°F
FTPC1 - 9414290 - San Francisco, CA 43 mi51 min 1015.3 hPa (+1.1)
LNDC1 43 mi45 min WSW 4.1 G 5.1 59°F 1015 hPa
ELXC1 - Elkhorn Slough Reserve, CA 43 mi66 min W 2.9 57°F 1015 hPa55°F
46237 - San Francisco Bar, CA (142) 44 mi51 min 57°F3 ft
OKXC1 - 9414776 - Oakland (Berth 34), CA 44 mi45 min W 7 G 8.9 58°F 1015 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 46 mi31 min S 3.9 G 5.8 56°F 57°F1015.7 hPa
46240 - Cabrillo Point, Monterey Bay, CA (158) 46 mi30 min 59°F2 ft
MEYC1 48 mi75 min SSE 2.9 G 5.1 57°F 59°F1015.6 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 49 mi40 min WSW 2.9 57°F 1015 hPa

Wind History for Redwood City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Half Moon Bay Airport, CA24 mi56 minSSE 33.00 miFog/Mist55°F55°F100%1015.2 hPa

Wind History from PAO (wind in knots)
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Last 24hrE8----N7N10N10N12--NW15NW15NW10NW10SW3------------------4SW6
1 day agoCalm4--N8N10NW10--------------------------------Calm--
2 days ago--N6N7------NW12NW12NW10--NW13NW10NW10--------------------Calm

Tide / Current Tables for Ano Nuevo Island, California
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Ano Nuevo Island
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Tue -- 02:05 AM PDT     0.34 feet Low Tide
Tue -- 02:15 AM PDT     Moonset
Tue -- 06:31 AM PDT     Sunrise
Tue -- 08:59 AM PDT     3.82 feet High Tide
Tue -- 01:53 PM PDT     2.77 feet Low Tide
Tue -- 04:57 PM PDT     Moonrise
Tue -- 07:34 PM PDT     5.10 feet High Tide
Tue -- 07:53 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.10.60.30.50.91.62.43.13.63.83.73.43.12.82.833.44.14.655.14.73.92.8

Tide / Current Tables for Half Moon Bay, California
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Half Moon Bay
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Tue -- 02:15 AM PDT     Moonset
Tue -- 02:20 AM PDT     0.45 feet Low Tide
Tue -- 06:31 AM PDT     Sunrise
Tue -- 09:16 AM PDT     4.24 feet High Tide
Tue -- 02:07 PM PDT     2.88 feet Low Tide
Tue -- 04:59 PM PDT     Moonrise
Tue -- 07:52 PM PDT     5.51 feet High Tide
Tue -- 07:54 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.50.80.50.511.62.43.23.94.24.23.83.432.933.54.14.85.35.55.24.53.4

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 (11,2,3,4)
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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.