Tuesday, September17, 2019 L-36.com


Marine Weather and Tides
East Palo Alto, CA

Version 3.4
NOTICE
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 6:50AMSunset 7:15PM Tuesday September 17, 2019 1:39 PM PDT (20:39 UTC) Moonrise 8:23PMMoonset 8:58AM Illumination 86% Phase: Waning Gibbous; Moon at 18 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 The San Francisco Bay North Of The Bay Bridge- 825 Am Pdt Tue Sep 17 2019
Today..SW winds 5 to 15 kt.
Tonight..W winds 5 to 15 kt.
Wed..SW winds 5 to 15 kt. A slight chance of showers.
Wed night..W winds 5 to 15 kt.
Thu..W winds 5 to 15 kt.
Thu night..W winds up to 10 kt.
Fri..W winds 5 to 15 kt.
Sat..W winds 5 to 15 kt.
PZZ500 825 Am Pdt Tue Sep 17 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Light to locally gusty west to northwest winds will prevail over the waters through the middle of the week. The strongest winds will be generally confined along and south of the coastal points, as well as through the coastal gaps and over the bays. A front will move through Tuesday night and Wednesday bringing a slight chance of showers to the northern waters tonight and into Wednesday morning. Northwesterly winds will increase at the end of the week. Mixed seas will continue with a moderate period northwest swell and a light southerly swell.


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 172024
afdmtr
area forecast discussion
national weather service san francisco bay area
124 pm pdt Tue sep 17 2019

Synopsis A weather system approaching from the northwest will
bring isolated to scattered showers to northern california late
tonight and across the san francisco bay area early Wednesday.

Temperatures will remain slightly below seasonal averages as well
through Thursday. A warming trend is then forecast for Friday and
into the upcoming weekend as high pressure builds in from the
eastern pacific.

Discussion As of 01:23 pm pdt Tuesday... A mid upper level low
currently sliding down the british columbia coast is pushing a
frontal boundary into the pacific northwest. Meanwhile, mostly
sunny conditions and mild temperatures persist across the region
with temperatures generally in the 70s. Overnight, generally quiet
weather conditions will persist with the potential for a slight
increase in low-level clouds in advance of the approaching cold
front.

Light rain showers will be possible over the north bay late in
the night into early Wednesday morning as the cold front advances
southward. The boundary will then push across the san francisco
bay area around sunrise and during the morning commute with
isolated to scattered rain showers possible. However, the frontal
boundary will be weakening as it approaches the central coast with
lesser potential for showers south of santa cruz and santa clara
counties. With this said, for those that do see rain showers,
rainfall amounts will generally be around 0.10" of an inch or less
with isolated amounts upwards of 0.25" in the north bay mountains
and or coastal ranges. Cannot rule out a few sprinkles early in
the morning for monterey and san benito counties, yet widespread
measurable rainfall is unlikely. Other than wet roadways during
the Wednesday morning commute, impacts from this system will be
minimal with generally light northerly winds.

Dry conditions then develop by Wednesday afternoon and evening as
the front dissipates over the region. Temperatures will also
change little with this frontal passage with widespread 70s inland
to upper 60s coast. A gradual warming trend is then forecast for
late week in response to high pressure building over the eastern
pacific. As the ridge shifts toward the coast Friday and Saturday,
widespread 80s are likely inland with even a few of the warmer
inland locations reaching into the lower 90s.

In the extended, model differences result in lower confidence with
respect to the overall synoptic pattern and forecast weather
conditions. The GFS and ECMWF both show another mid upper level
trough dropping down the west coast early next week. However, the
ecmwf is much further inland over the great basin while the gfs
tracks the system closer to the coastline. Meanwhile, high
pressure will continue to dominate over the eastern pacific early
next week. Until we see a bit more convergence in the model
solutions, will not make many chances to the extended forecast
period. Thus, will maintain dry weather conditions and
temperatures near to slightly above seasonal averages.

Aviation As of 10:53 am pdt Tuesday... For 18z tafs. Clear
skies withVFR conditions this afternoon and evening. Another
early season cold front arrives overnight into early weds morning.

This will have impacts for weds am. Front to arrive north bay
before 12z and over the bay area terminals 12-15z. Showers will be
minimal with best chances ksts. However lowering of CIGS with
typical light southeast winds to likely impact sfo and oak 12-17z.

Wind speeds look light but runways may be wet as sprinkles light
showers drizzle occur with frontal passage. Rapid clearing and nw
winds after 18z weds.

Vicinity of ksfo...VFR through late tonight. Increasing cigs
expected overnight with possible MVFR conditions early tomorrow
morning. Southeast winds and possible wet runways to start the day
weds.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals...VFR conditions through late tonight
before possible MVFR ifr CIGS develop over the peninsula by early
weds morning.

Marine As of 9:00 am pdt Tuesday... Light to locally gusty west
to northwest winds will prevail over the waters through the
middle of the week. The strongest winds will be generally confined
along and south of the coastal points, as well as through the
coastal gaps and over the bays. A front will move through Tuesday
night and Wednesday bringing a slight chance of showers to the
northern waters tonight and into Wednesday morning. Northwesterly
winds will increase at the end of the week. Mixed seas will
continue with a moderate period northwest swell and a light
southerly swell.

Mtr watches warnings advisories
Tngt Sca... Mry bay until 9 pm
sca... Pigeon pt to pt pinos 0-10 nm until 9 pm
sca... Pt pinos to pt piedras blancas 0-10 nm
public forecast: rgass
aviation: rww
marine: rowe
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 mi52 min N 9.9 G 12 1018.5 hPa
AAMC1 - 9414750 - Alameda, CA 24 mi58 min W 2.9 G 4.1 70°F 69°F1018.5 hPa
LNDC1 26 mi52 min W 1 G 6 1017.8 hPa
OBXC1 27 mi58 min 66°F 56°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 27 mi58 min WNW 6 G 8
PXSC1 28 mi64 min 70°F 53°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 28 mi52 min W 6 G 9.9 71°F 1016.9 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 28 mi52 min WNW 8.9 G 11 1017.9 hPa
FTPC1 - 9414290 - San Francisco, CA 30 mi58 min WSW 8.9 G 12 63°F 61°F1018.5 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 34 mi52 min SSW 8.9 G 12 67°F 1018.3 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 35 mi59 min E 4.1 68°F 1018 hPa
46237 - San Francisco Bar, CA (142) 35 mi70 min 61°F4 ft
RCMC1 - 9414863 - Richmond, CA 36 mi52 min 65°F
MZXC1 - 9415102 - Martinez-Amorco CA 41 mi58 min WNW 9.9 G 11 70°F 71°F1017.5 hPa51°F
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 42 mi40 min WNW 9.7 G 12 60°F 60°F1018.9 hPa (+0.0)
UPBC1 42 mi52 min NW 8 G 11
PCOC1 - 9415144 - Port Chicago, CA 43 mi58 min W 8 G 8.9 71°F 70°F1017.6 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 43 mi52 min WNW 5.1 G 6 70°F 1017.5 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 44 mi58 min WNW 5.1 G 8 71°F 1017.2 hPa
46042 - MONTEREY - 27NM West of Monterey Bay, CA 47 mi50 min 9.7 G 12 60°F 58°F6 ft1017.8 hPa (-0.3)
MLSC1 - Moss Landing, South Harbor, CA 48 mi155 min WNW 7 G 20 60°F 1018.6 hPa56°F
ELXC1 - Elkhorn Slough Reserve, CA 48 mi115 min NW 7 71°F 1017 hPa53°F
46092 - MBM1 48 mi79 min W 7.8 58°F 59°F1018 hPa (+0.3)

Wind History for Redwood City, CA
(wind in knots)    EDIT      (on/off)   Help
2
PM
3
PM
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
Last
24hr
NW8
W12
G15
W16
NW12
W10
G13
W8
G11
SW6
G9
W8
SW4
G8
NW4
W6
G9
W5
W5
W6
SW3
S3
--
SE3
--
E3
W1
NW1
N7
N8
G11
1 day
ago
W14
G18
W13
G17
W14
G19
W11
G14
SW12
G16
SW8
G11
W8
G11
W12
G15
SW7
G10
W10
W6
NW5
S1
E3
E1
SE4
NW5
G8
W11
SW6
W7
W7
G10
W10
G14
W10
G14
W7
G13
2 days
ago
NW14
NW11
G15
NW12
G15
NW13
NW14
NW13
NW5
G9
NW8
NW6
W9
NW5
W5
NW5
W2
S3
W4
W7
S3
S3
S3
W7
G11
SW10
G14
W11
G14
W9

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Palo Alto Airport, CA2 mi1.9 hrsN 810.00 miClear68°F55°F64%1018.3 hPa
San Carlos Airport, CA10 mi52 minN 610.00 miClear72°F51°F50%1017.9 hPa
San Jose, San Jose International Airport, CA11 mi47 minWNW 610.00 miA Few Clouds75°F50°F42%1017.3 hPa
Hayward, Hayward Air Terminal, CA15 mi46 minWNW 910.00 miFair72°F52°F50%1018.6 hPa
San Jose / Reid / Hillv, CA17 mi53 minNW 810.00 miClear73°F48°F41%1017.6 hPa
Oakland, Metro Oakland International Airport, CA18 mi47 minW 610.00 miA Few Clouds72°F53°F52%1017.8 hPa
San Francisco, San Francisco International Airport, CA18 mi44 minWNW 810.00 miA Few Clouds75°F48°F40%1017.6 hPa
Half Moon Bay Airport, CA22 mi45 minW 99.00 miFair66°F55°F68%1018.6 hPa
Livermore, Livermore Municipal Airport, CA23 mi47 minVar 610.00 miFair76°F46°F36%1016.7 hPa

Link to 5 minute data for KPAO

Wind History from PAO (wind in knots)
1
PM
2
PM
3
PM
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
Last 24hrW9NW7NW11NW13NW12NW11NW9W8W8------------------Calm--CalmCalmNE5N8
1 day agoN11NW12
G22
NW13W8
G15
W10
G15
W12W10
G17
--W8------------------W10NW10NW7NW8NW8W8
2 days agoN10--N16--N18----N9N6------------------Calm544NE6--

Tide / Current Tables for Palo Alto Yacht Harbor, California
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Palo Alto Yacht Harbor
Click for Map
Tue -- 03:26 AM PDT     7.36 feet High Tide
Tue -- 06:51 AM PDT     Sunrise
Tue -- 09:58 AM PDT     Moonset
Tue -- 10:21 AM PDT     1.89 feet Low Tide
Tue -- 03:48 PM PDT     7.89 feet High Tide
Tue -- 07:13 PM PDT     Sunset
Tue -- 09:22 PM PDT     Moonrise
Tue -- 10:52 PM PDT     1.49 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
34.76.37.37.26.35.13.932.31.922.94.46.27.57.97.25.94.53.32.31.71.5

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
Tue -- 12:30 AM PDT     1.19 knots Max Flood
Tue -- 03:40 AM PDT     -0.01 knots Slack
Tue -- 06:51 AM PDT     Sunrise
Tue -- 07:52 AM PDT     -0.99 knots Max Ebb
Tue -- 09:58 AM PDT     Moonset
Tue -- 10:02 AM PDT     0.00 knots Slack
Tue -- 12:42 PM PDT     1.11 knots Max Flood
Tue -- 03:43 PM PDT     -0.01 knots Slack
Tue -- 07:13 PM PDT     Sunset
Tue -- 08:11 PM PDT     -1.12 knots Max Ebb
Tue -- 09:22 PM PDT     Moonrise
Tue -- 10:33 PM PDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
1.11.10.90.4-0.1-0.4-0.7-0.9-1-0.6-00.511.10.90.4-0.1-0.4-0.8-1-1.1-0.9-0.30.3

Weather Map
       (on/off)   Help Weather Map
wmap_P
GEOS 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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for San Francisco/Monterey Bay Area, CA (16,3,4,5)
      (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.