Friday, July21, 2017 L-36.com


Marine Weather and Tides
Piedmont, CA

Version 3.4
What's New / NOTES
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.
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 6:02AMSunset 8:27PM Friday July 21, 2017 3:51 PM PDT (22:51 UTC) Moonrise 3:17AMMoonset 5:58PM Illumination 3% Phase: Waning Crescent; Moon at 28 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
    EDIT      (on/off)   Help
PZZ530 San Pablo Bay Suisun Bay The West Delta And San Francisco Bay North Of The Bay Bridge- 234 Pm Pdt Fri Jul 21 2017
Tonight..SW winds 5 to 15 kt.
Sat..SW winds 5 to 15 kt.
Sat night..SW winds 10 to 20 kt.
Sun..SW winds 10 to 20 kt.
Sun night..SW winds 10 to 20 kt.
Mon..SW winds 10 to 20 kt.
Tue..SW winds 5 to 15 kt.
Wed..SW winds 10 kt.
PZZ500 234 Pm Pdt Fri Jul 21 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Gusty northwesterly winds will continue into Saturday before decreasing somewhat during the remainder of the weekend as high pressure off the california coast begins to weaken.

7 Day Forecast for Marine Location Near Piedmont, CA
   Hourly   EDIT   Help
location: 37.85, -122.22     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus66 kmtr 212043
afdmtr
area forecast discussion
national weather service san francisco bay area
143 pm pdt Fri jul 21 2017

Synopsis As a ridge of high pressure builds into our region
temperatures will warmer into the weekend. Temperatures will
moderate next week as the ridge progresses to the east.

Discussion As of 01:42 pm pdt Friday... This morning's stratus
was quick to mix out and transition to mostly clear skies across
the region this afternoon. Compared to 24 hours ago, temperatures
at most bay area airports are running between 2 and 4 degrees
warmer. These trends can be translated to this afternoon's highs
as we begin a warming trend into the weekend. Friday's highs along
the coast will range from the 50s to 60s and highs inland will be
anywhere from the mid 70s to 90s.

A building upper level ridge is largely responsible for the
warming temperatures. 500 mb heights currently sit around 589 to
590 dam and will trend upward to 593 to 594 dam over the weekend.

Additionally, 850 mb temps will nudge from about 20 deg c to 23
deg c from today to Saturday, per the 12z ecmwf. At the surface
this will translate to widespread 80s and 90s for inland
communities on both Saturday and Sunday. Right now, there are no
indications that this weekend's temperatures will approach prior
heat event levels. As mentioned in previous discussions, the
warmest ECMWF ensemble members remain cooler than the observed
highs from july 7-8 when many bay area interior locations
surpassed the century mark. Since the expected heat risk values
remain in the low to moderate range, don't anticipate on launching
any heat- related headlines given the current forecast. Coastal
locations are forecast to remain cool with highs generally in the
60s to 70s.

Models are in fair agreement in advertising an upper level low to
approach the northern california coast early next week. As a
result, temperatures for interior areas will begin a cooling trend
on Monday and continue into the middle part of next week. By this
point, models are trying to suggest midlevel moisture advection
into parts of central california. Unfortunately, models have been
inconsistent from run-to-run and therefore confidence remains low
for shower and thunderstorm potential at this time. For now,
probability of precipitation is less than 10 percent. We'll
continue to monitor moisture trends in the models and adjust the
forecast accordingly.

Aviation As of 10:39 am pdt Friday... For 18z TAF package.

Stratus has cleared from all terminal sites and is currently over
only portions of the monterey bay per satellite imagery. Westerly
sea breeze winds will increase this afternoon with gusts over 25
kt expected at ksfo by 20-21z.VFR conditions expected all day
into the evening hours. MVFR ifr CIGS are expected to form late
tonight early Saturday morning at most TAF sites.

Vicinity of ksfo...VFR. Breezy afternoon sea breeze winds
expected. Looking for MVFR CIGS after midnight.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals...VFR today. MVFR ifr CIGS reform by
10-12z.

Marine As of 01:30 pm pdt Friday... Gusty northwesterly winds
will continue into Saturday before decreasing somewhat during the
remainder of the weekend as high pressure off the california
coast begins to weaken.

Mtr watches warnings advisories
Tngt Sca... Mry bay until 9 pm
sca... Pt reyes to pigeon pt 0-10 nm until 9 pm
sca... Pigeon pt to pt pinos 0-10 nm until 9 pm
sca... Pt arena to pt reyes 0-10 nm
sca... Pt arena to pigeon pt 10-60 nm
sca... Pigeon pt to pt piedras blancas 10-60 nm
sca... Pt pinos to pt piedras blancas 0-10 nm
public forecast: rowe
aviation: sims
marine: sims
visit us at

Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LNDC1 5 mi51 min WSW 8 G 11 67°F 1015.2 hPa (-1.2)
OBXC1 7 mi51 min 65°F 55°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 7 mi51 min WSW 9.9 G 12
OKXC1 - 9414776 - Oakland (Berth 34), CA 7 mi51 min W 8 G 9.9 67°F 1015.2 hPa (-1.1)
AAMC1 - 9414750 - Alameda, CA 7 mi51 min WSW 9.9 G 13 65°F 69°F1015.8 hPa (-1.1)
PPXC1 - 9414847 - Richmond (Point Potrero), CA 9 mi51 min SSW 17 G 21 61°F 1015.2 hPa (-1.3)
PXOC1 - 9414311 - San Francisco (Pier 1), CA 10 mi51 min SSW 1.9 G 8 68°F 1014.3 hPa (-1.0)
PXSC1 10 mi51 min 66°F 53°F
RCMC1 - 9414863 - Richmond, CA 11 mi51 min S 8 G 12 63°F 63°F1014.7 hPa (-1.4)
FTPC1 - 9414290 - San Francisco, CA 13 mi51 min WSW 15 G 20 61°F 58°F1015.5 hPa (-1.3)
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 14 mi51 min WSW 11 G 13 73°F 1013.5 hPa (-1.8)
MZXC1 - 9415102 - Martinez-Amorco CA 14 mi51 min WNW 14 G 15 80°F 69°F1013.6 hPa (-1.8)53°F
PCOC1 - 9415144 - Port Chicago, CA 17 mi51 min W 13 G 14 79°F 72°F1013.1 hPa (-1.9)
46237 - San Francisco Bar, CA (142) 22 mi51 min 55°F5 ft
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 22 mi57 min NW 13 G 17 81°F 1012.7 hPa
RTYC1 - 9414523 - Redwood City, CA 24 mi51 min W 14 G 17 73°F 73°F1014.3 hPa (-1.4)
SFXC1 - San Francisco Bay Reserve, CA 26 mi66 min WNW 8.9 86°F 1013 hPa58°F
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 33 mi61 min NW 16 G 18 54°F 52°F6 ft1016 hPa (-0.9)
PRYC1 - 9415020 - Point Reyes, CA 41 mi51 min WNW 24 G 28 60°F 54°F1015.4 hPa (-1.3)
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 49 mi61 min NW 12 G 14 57°F 57°F6 ft1016.8 hPa (-0.5)

Wind History for Oakland Middle Harbor, CA
(wind in knots)    EDIT      (on/off)   Help
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
Last
24hr
SW10
SW11
G14
SW11
SW14
S9
G13
SW11
G14
SW6
SW5
S5
S1
S12
SW11
S12
SW4
SW15
SW13
SW12
SW7
G11
SW9
SW10
SW11
SW4
SW10
W10
1 day
ago
W9
G13
SW10
G13
SW13
SW9
SW8
SW11
S5
SW16
SW14
G17
SE4
SE4
S4
G10
S11
G14
SW7
S6
G9
S9
G12
S8
G13
S11
S11
S11
SW8
SW12
SW13
2 days
ago
SW11
G14
SW9
SW11
SW11
SW9
G12
W12
G16
SW10
G14
SW10
S4
SW14
SW13
G16
SW14
G17
S4
SW11
SW9
G13
SW12
SW11
G14
S10
SW8
G11
SW7
SW10
SW10
SW10
SW11

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Oakland, Metro Oakland International Airport, CA10 mi58 minW 1010.00 miFair73°F53°F50%1015.3 hPa
Concord, Buchanan Field, CA13 mi58 minNW 1010.00 miFair92°F53°F27%1011.8 hPa
Hayward, Hayward Air Terminal, CA14 mi57 minWNW 1210.00 miFair72°F52°F50%1016.1 hPa
San Francisco, San Francisco International Airport, CA18 mi55 minW 1910.00 miA Few Clouds and Breezy69°F50°F51%1015.3 hPa
San Carlos Airport, CA22 mi63 minWNW 1210.00 miClear75°F50°F41%1014.9 hPa
Livermore, Livermore Municipal Airport, CA24 mi58 minWNW 1210.00 miFair87°F48°F27%1013.3 hPa

Wind History from OAK (wind in knots)
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
Last 24hrW12W13W11W8W12W14SW11W10SW3N5NE5W3SW7CalmCalmS9S8SW7SW7SW5W7W8W10W10
1 day agoW15W15W15W16W11W11SW8W7NE3CalmW5CalmN3SW3SW9SW105CalmW6SW8W6W7W9W12
2 days agoW12W13W12W15W12W8W13W11W3SE5W3SW9N3NW4SW9SW7SW6SW7SW6W5W8W8W13W12

Tide / Current Tables for Berkeley, San Francisco Bay, California
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Berkeley
Click for Map
Fri -- 04:17 AM PDT     Moonrise
Fri -- 05:07 AM PDT     -0.96 feet Low Tide
Fri -- 06:03 AM PDT     Sunrise
Fri -- 12:00 PM PDT     4.94 feet High Tide
Fri -- 04:48 PM PDT     2.37 feet Low Tide
Fri -- 06:58 PM PDT     Moonset
Fri -- 08:27 PM PDT     Sunset
Fri -- 10:50 PM PDT     7.11 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
5.642.20.6-0.5-1-0.70.11.22.53.74.64.94.743.12.52.42.83.74.966.97.1

Tide / Current Tables for Oakland Harbor WebStreeter Street, San Francisco Bay, California Current
   EDIT      (on/off)   Help   One Week of Data
Oakland Harbor WebStreeter Street
Click for Map
Fri -- 01:17 AM PDT     -1.61 knots Max Ebb
Fri -- 04:17 AM PDT     Moonrise
Fri -- 05:13 AM PDT     0.01 knots Slack
Fri -- 06:03 AM PDT     Sunrise
Fri -- 08:33 AM PDT     1.27 knots Max Flood
Fri -- 11:45 AM PDT     -0.01 knots Slack
Fri -- 01:55 PM PDT     -0.79 knots Max Ebb
Fri -- 05:02 PM PDT     0.00 knots Slack
Fri -- 06:58 PM PDT     Moonset
Fri -- 08:10 PM PDT     1.00 knots Max Flood
Fri -- 08:26 PM PDT     Sunset
Fri -- 10:57 PM PDT     -0.01 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-1.3-1.6-1.5-1.2-0.8-0.10.511.21.210.5-0.2-0.7-0.8-0.7-0.4-00.40.810.90.6-0

Weather Map and Satellite Images
       (on/off)   Help
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 (18,4,5,8)
      (on/off)   Help

Ground Weather Radar Station Sacramento, CA
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

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.