Sunday, April23, 2017 L-36.com


Marine Weather and Tides
Pacifica, CA

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 6:22AMSunset 7:54PM Saturday April 22, 2017 10:35 PM PDT (05:35 UTC) Moonrise 3:18AMMoonset 2:50PM Illumination 9% Phase: Waning Crescent; Moon at 27 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
PZZ545 Point Reyes To Pigeon Point To 10 Nm- 859 Pm Pdt Sat Apr 22 2017
.small craft advisory in effect through late Sunday night...
Tonight..NW winds 10 to 20 kt. Wind waves 2 to 4 ft. W swell 7 to 9 ft at 16 seconds and southwest 3 to 4 ft at 16 seconds. Patchy fog after midnight.
Sun..NW winds 15 to 25 kt. Wind waves 4 to 6 ft. W swell 8 to 10 ft at 14 seconds and south 3 to 4 ft at 15 seconds. Patchy fog in the morning.
Sun night..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. W swell 8 to 10 ft at 14 seconds and south 3 to 4 ft at 15 seconds.
Mon..W winds 5 to 15 kt. Wind waves 1 to 3 ft. W swell 6 to 8 ft at 13 seconds. Slight chance of rain.
Mon night..W winds 5 to 15 kt. Wind waves 1 to 3 ft. W swell 6 to 8 ft at 12 seconds. Slight chance of rain.
Tue..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. W swell 6 to 8 ft. Slight chance of rain, then slight chance of showers.
Wed..NW winds 15 to 25 kt. Wind waves 4 to 6 ft. W swell 7 to 9 ft. Slight chance of showers.
Thu..NW winds 20 to 30 kt. Wind waves 5 to 7 ft. W swell 9 to 12 ft.
...san francisco bar/fourfathom bank forecast..... In the deep water channel...combined seas 3 to 5 feet...increasing to 5 to 8 ft on Sunday...with a dominant period of 16 seconds. Across the bar...combined seas 4 to 6 feet with a period of 16 seconds. Maximum ebb current of 1.2 knots at 01:24 am Sunday and 1.3 knots at 01:18 pm Sunday.
PZZ500 859 Pm Pdt Sat Apr 22 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Northwest winds and seas will begin to increase and strengthen Sunday afternoon and night. Strong northerly winds will persist along the big sur coast down to point piedras blancas at least through Monday. Late season cold air moving towards cape mendocino will keep northwesterly winds and seas in place through much of next week.

7 Day Forecast for Marine Location Near Pacifica, CA
   Hourly   EDIT   Help
location: 37.62, -122.51     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus66 kmtr 230403
afdmtr
area forecast discussion
national weather service san francisco bay area
903 pm pdt Sat apr 22 2017

Synopsis A dry front brought cooler weather to the bay area
today and cool conditions will continue into Sunday, along with
patchy morning low clouds. Unsettled weather is expected
through the first half of next week, with periodic rain chances
across mainly the northern portion of our area. Dry weather will
return to all areas later next week with warmer temperatures
expected by week's end.

Discussion As of 9:00 pm pdt Saturday... A mostly dry cold front
swept across our region today, bringing widespread clouds and
cooler temperatures. High temperatures today were as much as ten
degrees cooler compared to Friday. There were also a few light
showers reported in the north bay, but these showers mostly
produced only trace amounts of precipitation.

Patchy low clouds have developed near the coast this evening, and
these clouds will likely linger into Sunday morning. Mostly sunny
conditions are expected by Sunday afternoon. Look for another
cool day on Sunday with highs mostly in the 60s. Northwest winds
will increase by afternoon and locally breezy conditions are
expected near the coast.

A series of weak weather systems moving through northwest flow
aloft are forecast to track across northern california during the
first half of the coming work week. These systems may produce
periodic light rain across the northern portion of our forecast
area (mainly north bay) from Monday through Wednesday. Elsewhere,
dry and seasonably cool conditions will continue.

The models are in general agreement in developing dry weather
across our entire area by Thursday of next week, with warming
expected late in the week and into next weekend as an upper ridge
develops just offshore.

Aviation As of 6:04 pm pdt Saturday...VFR is reported per metar
observations and web cams also show good to very good visibilities.

Air mass water vapor content per dewpoint temperatures in the upper
40s to 50s is highest along the immediate coast and nearest the
bays where few-sct low clouds continue to develop today. Post
frontal lower level cooling (-3c to -6c at 925 mb level) tonight
will continue to erode already weakened lower level inversions
over the north central coast with no evidence of inversions
remaining over the bay area this afternoon. Inherited tafs look
good, only minor adjustments were made e.G. To delay forecast
arrival of MVFR cig at koak this evening.

Vicinity of ksfo... W-nw winds 15-20 knots tonight.VFR tempo MVFR cig
12z-16z Sunday. W-nw winds 10-15 knots Sunday with afternoon and evening
gusts to 25 knots.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... W-sw winds 5-10 knots.VFR with MVFR cigs
developing early Sunday morning.VFR forecast to return by late
morning.

Marine As of 5:19 pm pdt Saturday... A weak front is moving
through the region with gentle long period swells currently over
the waters. Tonight northwest wind and seas will begin to increase
and then strengthen Sunday afternoon and night. Strong northerly
winds will persist along along the big sur coast down to point
piedras blancas at least through Monday. Late season cold fronts
moving towards CAPE mendocino will keep NW wind and seas in place
through much of next week.

Mtr watches/warnings/advisories
Tngt Sca... Pt arena to pt reyes 0-10 nm from 9 pm
sca... Pt reyes to pigeon pt 0-10 nm from 9 pm
sca... Pigeon pt to pt pinos 0-10 nm from 9 pm
sca... Pt pinos to pt piedras blancas 0-10 nm
public forecast: dykema
aviation: canepa
marine: rww
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
FTPC1 - 9414290 - San Francisco, CA 13 mi53 min WSW 7 G 11 56°F 55°F1016.4 hPa
46237 - San Francisco Bar, CA (142) 13 mi65 min 55°F5 ft
PXSC1 14 mi47 min 57°F 47°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 14 mi53 min WSW 6 G 11 56°F 1015 hPa
AAMC1 - 9414750 - Alameda, CA 15 mi47 min WNW 5.1 G 8 57°F 62°F1016.5 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 16 mi47 min NW 6 G 7 58°F 1016.2 hPa
OBXC1 16 mi47 min 58°F 47°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 16 mi47 min NW 5.1 G 5.1
LNDC1 17 mi71 min N 4.1 G 8 58°F 1016.1 hPa
RTYC1 - 9414523 - Redwood City, CA 18 mi47 min W 9.9 G 13 56°F 65°F1016.1 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 20 mi45 min NW 18 G 21 55°F 56°F5 ft1016.6 hPa (+0.6)
PPXC1 - 9414847 - Richmond (Point Potrero), CA 21 mi47 min NNW 9.9 G 13 58°F 1016.5 hPa
RCMC1 - 9414863 - Richmond, CA 22 mi53 min NW 12 G 17 56°F 58°F1015.9 hPa
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 26 mi45 min NW 18 G 19 56°F 58°F5 ft1016.5 hPa (-0.0)
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 33 mi47 min W 15 G 20 58°F 1015.6 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 35 mi47 min W 13 G 16 57°F 60°F1016.2 hPa49°F
UPBC1 35 mi47 min WNW 14 G 19
PRYC1 - 9415020 - Point Reyes, CA 36 mi47 min WNW 17 G 20 56°F 56°F1016.6 hPa
PCOC1 - 9415144 - Port Chicago, CA 39 mi47 min W 13 G 18 57°F 60°F1015.8 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 44 mi47 min WNW 9.9 G 13 58°F 1015.2 hPa
SFXC1 - San Francisco Bay Reserve, CA 48 mi110 min W 12 57°F 1014 hPa49°F

Wind History for San Francisco, CA
(wind in knots)    EDIT      (on/off)   Help
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
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
Last
24hr
SW8
G11
SW10
G16
W8
G12
W1
G5
SW3
G6
SW5
G9
SW2
SW4
E3
SW3
W6
G9
W4
G8
W7
W6
G10
SW8
G13
W6
G13
W11
G16
W8
G14
SW6
G10
W10
G13
W8
G11
SW7
G12
SW5
G9
SW4
1 day
ago
S3
S4
SW3
SW2
SE2
S2
S2
E4
SE1
N4
E4
E4
NE3
W7
SW10
W11
G14
W10
G16
SW5
G11
SW10
G16
W10
G16
SW11
G17
SW11
G17
SW8
G11
W7
G13
2 days
ago
SW4
SW2
S1
W3
SW6
SW6
SW5
G9
W6
G13
W8
G11
W9
G13
W9
G13
W11
G16
W7
G12
W8
G12
SW9
G14
SW5
G10
SW3
G9
SW3

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Half Moon Bay Airport, CA8 mi40 minNNW 14 G 197.00 miFair54°F50°F88%1017.3 hPa
San Francisco, San Francisco International Airport, CA8 mi39 minWNW 710.00 miPartly Cloudy55°F50°F83%1016.6 hPa
San Carlos Airport, CA15 mi40 minWNW 510.00 miFair55°F48°F77%1016.9 hPa
Oakland, Metro Oakland International Airport, CA16 mi42 minWNW 1110.00 miA Few Clouds58°F50°F75%1016.3 hPa
Hayward, Hayward Air Terminal, CA21 mi41 minNW 410.00 miFair57°F46°F67%1017.1 hPa
Palo Alto Airport, CA23 mi1.8 hrsWNW 1210.00 miA Few Clouds59°F48°F68%1016.6 hPa

Wind History from HAF (wind in knots)
11
PM
-12
PM
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
Last 24hrCalmCalmNE3CalmCalmN3CalmCalmE4CalmNW5NW4NW8NW10NW10NW11N9NW11N8
G15
NW8NW8NW7N7N12
G19
1 day agoN10NW6CalmCalmCalmCalmN3CalmCalmNW3NW5NE9NW7NW14NW15NW18N12NW13NW12N11NW11NW9NW6Calm
2 days agoSE5S7CalmCalmCalmCalmCalmCalmCalmN7NW6N10
G14
NW9NW11NW14NW13
G19
NW15
G18
NW10N15
G20
N16
G22
N11
G19
N9
G16
N9N10

Tide / Current Tables for Seaplane Harbor, San Francisco Bay, California
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Seaplane Harbor
Click for Map
Sun -- 04:53 AM PDT     Moonrise
Sun -- 04:55 AM PDT     1.17 feet Low Tide
Sun -- 06:23 AM PDT     Sunrise
Sun -- 10:44 AM PDT     6.32 feet High Tide
Sun -- 04:55 PM PDT     Moonset
Sun -- 04:56 PM PDT     0.40 feet Low Tide
Sun -- 07:52 PM PDT     Sunset
Sun -- 11:19 PM PDT     6.91 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
6.153.62.31.41.21.62.63.95.26.16.35.84.73.21.70.70.40.923.44.96.26.9

Tide / Current Tables for Sierra Point 1.3 mi ENE, South San Francisco Bay, California Current
   EDIT      (on/off)   Help   One Week of Data
Sierra Point 1.3 mi ENE
Click for Map
Sun -- 01:57 AM PDT     -1.08 knots Max Ebb
Sun -- 04:53 AM PDT     Moonrise
Sun -- 05:05 AM PDT     0.00 knots Slack
Sun -- 06:23 AM PDT     Sunrise
Sun -- 08:04 AM PDT     0.95 knots Max Flood
Sun -- 11:08 AM PDT     -0.00 knots Slack
Sun -- 02:12 PM PDT     -1.19 knots Max Ebb
Sun -- 04:55 PM PDT     Moonset
Sun -- 05:18 PM PDT     0.01 knots Slack
Sun -- 07:52 PM PDT     Sunset
Sun -- 08:24 PM PDT     1.12 knots Max Flood
Sun -- 11:35 PM PDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.6-1-1.1-0.9-0.6-0.10.40.810.90.60.1-0.5-1-1.2-1.1-0.7-0.20.40.81.11.10.80.4

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 (1,6,7,8)
      (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.