Friday, July21, 2017 L-36.com


Marine Weather and Tides
East Palo Alto, 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 6:03AMSunset 8:26PM Friday July 21, 2017 3:37 PM PDT (22:37 UTC) Moonrise 3:18AMMoonset 5:57PM 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 Stanford CDP, CA
   Hourly   EDIT   Help
location: 37.437, -122.153     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
RTYC1 - 9414523 - Redwood City, CA 6 mi50 min W 13 G 16 74°F 72°F1014.4 hPa
AAMC1 - 9414750 - Alameda, CA 24 mi50 min WSW 9.9 G 13 65°F 69°F1015.8 hPa
LNDC1 26 mi50 min WSW 8.9 G 9.9 67°F 1015.3 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 27 mi50 min WSW 11 G 12
OBXC1 27 mi50 min 65°F 54°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 28 mi50 min W 8.9 G 11 67°F 1015.2 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 28 mi50 min WSW 5.1 G 11 67°F 1014.3 hPa
PXSC1 28 mi50 min 66°F 53°F
FTPC1 - 9414290 - San Francisco, CA 30 mi50 min WSW 13 G 20 61°F 58°F1015.5 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 34 mi50 min SSW 15 G 21 61°F 1015.2 hPa
46237 - San Francisco Bar, CA (142) 35 mi68 min 55°F5 ft
RCMC1 - 9414863 - Richmond, CA 36 mi50 min S 7 G 12 64°F 62°F1014.7 hPa
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 39 mi48 min NW 12 G 14 57°F 57°F6 ft1016.8 hPa (-0.5)
MZXC1 - 9415102 - Martinez-Amorco CA 41 mi50 min WNW 13 G 15 80°F 69°F1013.7 hPa53°F
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 42 mi48 min NW 16 G 18 54°F 52°F6 ft1016 hPa (-0.9)
PCOC1 - 9415144 - Port Chicago, CA 43 mi50 min W 13 G 14 79°F 72°F1013.2 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 43 mi50 min WSW 13 G 14 73°F 1013.5 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 44 mi50 min NW 13 G 17 81°F 1012.7 hPa
46042 - MONTEREY - 27NM West of Monterey Bay, CA 47 mi48 min 58°F 56°F6 ft1016.5 hPa (-1.1)
ELXC1 - Elkhorn Slough Reserve, CA 48 mi113 min SSW 7 67°F 1016 hPa55°F
46092 - MBM1 48 mi100 min W 18 56°F 55°F1015.3 hPa (-1.4)

Wind History for Redwood City, 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
W12
G15
W12
G16
W11
G14
W10
G14
W10
W10
G13
W6
W6
W9
NW7
SW3
S5
W4
S2
S4
SW3
N2
E3
NE1
N8
N9
N11
NW10
W14
G17
1 day
ago
W14
G17
W16
G21
W14
G19
W13
G17
W11
G14
SW11
NW6
W9
W11
W5
NW3
S3
SW3
SW2
S3
NW3
W1
E3
NW5
G8
N7
G10
NW7
NW12
G15
W11
G14
W10
G14
2 days
ago
W12
G15
NW14
W14
G17
NW15
NW11
G14
W10
NW13
W7
W6
N3
S4
SE1
S1
S5
S4
S3
SE2
NW1
N7
G10
N6
N8
NW9
NW7
G16
W14
G17

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Palo Alto Airport, CA2 mi1.8 hrsNNW 1210.00 miClear75°F62°F65%1015.6 hPa
Mountain View, Moffett Field, CA3 mi42 minN 1310.00 miFair76°F57°F54%1015.2 hPa
San Carlos Airport, CA10 mi50 minWNW 1210.00 miClear75°F50°F41%1014.9 hPa
San Jose, San Jose International Airport, CA11 mi45 minWNW 1110.00 miFair80°F55°F44%1014.5 hPa
Hayward, Hayward Air Terminal, CA15 mi44 minWNW 1210.00 miFair72°F52°F50%1016.1 hPa
San Francisco, San Francisco International Airport, CA18 mi42 minW 1910.00 miA Few Clouds and Breezy69°F50°F51%1015.3 hPa
Oakland, Metro Oakland International Airport, CA18 mi45 minW 1010.00 miFair73°F53°F50%1015.3 hPa
Half Moon Bay Airport, CA22 mi43 minNNW 108.00 miPartly Cloudy63°F55°F77%1016.3 hPa
Livermore, Livermore Municipal Airport, CA23 mi45 minWNW 1210.00 miFair87°F48°F27%1013.3 hPa

Wind History from PAO (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 24hrN17NW11NW18NW10
G18
NW14NW13------------------CalmCalm4N5N8--N11N12N16
1 day agoN17NW18
G25
NW17NW10W10NW10------------------CalmCalm5NE6----N13N16N17
2 days ago--N17N15NW15NW12NW12------------------4--N5--N6N9----NW16

Tide / Current Tables for Palo Alto Yacht Harbor, California
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Palo Alto Yacht Harbor
Click for Map
Fri -- 04:17 AM PDT     Moonrise
Fri -- 06:04 AM PDT     Sunrise
Fri -- 06:23 AM PDT     -1.10 feet Low Tide
Fri -- 12:24 PM PDT     6.88 feet High Tide
Fri -- 06:28 PM PDT     2.56 feet Low Tide
Fri -- 06:56 PM PDT     Moonset
Fri -- 08:25 PM PDT     Sunset
Fri -- 11:51 PM PDT     9.62 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
8.97.55.63.51.5-0.1-1-0.90.42.44.56.16.86.86.25.44.43.42.72.73.75.67.79.2

Tide / Current Tables for Dumbarton Point 2.3 mi NE, South San Francisco Bay, California Current
   EDIT      (on/off)   Help   One Week of Data
Dumbarton Point 2.3 mi NE
Click for Map
Fri -- 03:53 AM PDT     -1.61 knots Max Ebb
Fri -- 04:17 AM PDT     Moonrise
Fri -- 06:03 AM PDT     Sunrise
Fri -- 06:41 AM PDT     0.01 knots Slack
Fri -- 09:30 AM PDT     1.69 knots Max Flood
Fri -- 12:48 PM PDT     -0.01 knots Slack
Fri -- 04:31 PM PDT     -0.79 knots Max Ebb
Fri -- 06:30 PM PDT     0.00 knots Slack
Fri -- 06:56 PM PDT     Moonset
Fri -- 08:25 PM PDT     Sunset
Fri -- 09:07 PM PDT     1.33 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.4-0.9-1.3-1.5-1.6-1.3-0.60.31.21.61.61.30.7-0.1-0.4-0.7-0.8-0.7-0.30.411.31.20.7

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 San Francisco Bay Area, 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.