Wednesday, June28, 2017 L-36.com


Marine Weather and Tides
Montara, 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 5:50AMSunset 8:37PM Wednesday June 28, 2017 12:08 PM PDT (19:08 UTC) Moonrise 10:02AMMoonset 11:16PM Illumination 22% Phase: Waxing Crescent; Moon at 5 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- 840 Am Pdt Wed Jun 28 2017
.small craft advisory in effect from 3 pm pdt this afternoon through late tonight...
Today..W winds 10 to 20 kt...increasing to 15 to 25 kt in the afternoon. Wind waves 3 to 5 ft. NW swell 2 to 3 ft at 9 seconds. Patchy fog late in the morning.
Tonight..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 4 to 6 ft at 9 seconds. Patchy fog after midnight.
Thu..NW winds 10 to 20 kt. Wind waves 2 to 4 ft. NW swell 4 to 6 ft at 10 seconds. Patchy fog in the morning.
Thu night..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 7 to 9 ft at 10 seconds. Patchy fog after midnight.
Fri..NW winds 20 to 30 kt. Wind waves 3 to 5 ft. NW swell 7 to 9 ft at 10 seconds. Patchy fog.
Sat..NW winds 20 to 30 kt. Wind waves 4 to 6 ft. NW swell 6 to 8 ft. Patchy fog.
Sun..W winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 6 to 8 ft. Patchy fog.
...san francisco bar/fourfathom bank forecast..... In the deep water channel...combined seas 4 to 6 ft with a dominant swell period of 9 seconds. Across the bar...combined seas 5 to 7 ft with a dominant swell period of 9 seconds. Maximum ebb current of 1 knots at 08:00 pm Wednesday and 1.5 knots at 07:06 am Thursday.
PZZ500 840 Am Pdt Wed Jun 28 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Northerly winds will continue to increase along the central coast as high pressure builds off the coast. Gusty winds will result in hazardous sea conditions with steep wind waves and fresh swell.

7 Day Forecast for Marine Location Near Montara, CA
   Hourly   EDIT   Help
location: 37.57, -122.58     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus66 kmtr 281749
afdmtr
area forecast discussion
national weather service san francisco bay area
1049 am pdt Wed jun 28 2017

Synopsis Marine air and stratus filtering inland on onshore winds
will persist causing near to slightly cooler than normal temperatures
today. Somewhat warmer temperatures will develop Thursday and Friday.

Except for patchy coastal drizzle, dry weather will persist over the
next 7 days. Night and morning coastal clouds will be followed by sunny
afternoons.

Discussion As of 8:49 am pdt Wednesday... Marine layer around
2000 feet deep this morning with stratus covering most of the
valleys. Onshore gradients around 2 mb but with ridge
strengthening slightly should allow for low clouds to clear back
to the coast by late morning. Looking over the current forecast
sky and temperature grids not seeing any reason for updates. Ridge
to strengthen slightly on Thursday should compress the marine
layer closer to 1500 feet with a little less inland penetration of
stratus for Thursday morning. Temperatures will run near or
slightly below normal today and then trend a few degrees warmer
inland for Thursday. Next shortwave upper trough approaches late
Friday evening and will likely induce a strong seabreeze and
deepening of the marine layer. In general the next 7 days through
the 4th of july holiday looks seasonable for late june early july
with night and morning low clouds followed by sunny and warm
afternoons.

Prev discussion As of 3:37 am pdt Wednesday... It's a fairly typical
summer stratus and fog pattern over the bay area and north central
coast this morning. The sfo-sac pressure gradient is 2.6 mb resulting
in onshore winds carrying ocean based stratus inland this morning in
a marine layer 1500-2000 feet deep. In addition to patchy fog, patchy
light drizzle has also been reported along the immediate coastline
since late last evening.

An upper level geopotential height ridge over the eastern pacific will
gradually advance toward the area late this week. Nearly stationary
lower to mid level thermal ridging over california will tend to
merge with the height ridge steadily strengthening the height ridge
as well as marine inversions through late week, and likely compress
inversions causing more favorable conditions for fog. Diurnal
warming contrasts between land and ocean will strengthen the
afternoon and evening sea-breezes causing stratus and fog to move
inland each night and morning; patchy dense fog may become more
favorable at times, mainly night-time and morning, from late week
into this weekend.

Aviation As of 10:47 am pdt Wednesday... For 18z tafs. 2000 ft
marine layer is holding strong this morning across much of the
immediate coastline along central california. Sfo and oak barely
scattered out yesterday, due to local effects of the marine layer,
before stratus built back in early yesterday evening. Today has
the potential to be similar. However, tafs do reflect clearing
(vfr) by 1830-19z at all terminals. Will monitor accordingly.

Breezy onshore winds again this afternoon, ranging from 10 to 20
kt, with occasional gusts over 20 kt at sfo. CIGS return early
again tonight.

Moderate confidence.

Vicinity of ksfo... Borderline ifr MVFR CIGS through 18-19z, but
could potentially be later.VFR anticipated by early afternoon.

Winds 15-20 kt, with gusts around 25 kt through early evening.

MVFR to ifr CIGS set to return around 04-05z, but will ultimately
depend on when if clearing occurs this afternoon.

Sfo bridge approach... Approach will clear before terminal,
sometime around 18-1830z.

Monterey bay terminals... Satellite shows nice clearing through the
salinas valley. Sns should be clear by 18z, followed by mry by
1830-19z. Moderate and occasionally gusty westerly winds this
afternoon, 10-15 kt on average. CIGS return by early evening or
late afternoon.

Marine As of 10:31 am pdt Wednesday... Northerly winds will
continue to increase along the central coast as high pressure
builds off the coast. Gusty winds will result in hazardous sea
conditions with steep wind waves and fresh swell.

Mtr watches warnings advisories
Tday Sca... Pt reyes to pigeon pt 0-10 nm from 3 pm
sca... Pigeon pt to pt pinos 0-10 nm from 3 pm
sca... Pt arena to pt reyes 0-10 nm
sca... Pt pinos to pt piedras blancas 0-10 nm
sca... Pt arena to pigeon pt 10-60 nm
sca... Pigeon pt to pt piedras blancas 10-60 nm from 3 pm
sca... Mry bay from 3 pm
sca... Sf bay from 11 am
public forecast: rww
aviation: bam
marine: bam
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
46237 - San Francisco Bar, CA (142) 15 mi69 min 58°F5 ft
FTPC1 - 9414290 - San Francisco, CA 17 mi51 min WSW 8.9 G 15
PXSC1 19 mi51 min 58°F 54°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 19 mi51 min S 2.9 G 6 57°F 1013.6 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 19 mi79 min NW 14 G 16 55°F 56°F6 ft1014.8 hPa (+0.6)
RTYC1 - 9414523 - Redwood City, CA 20 mi51 min NW 8.9 G 11 62°F 72°F1013.9 hPa
AAMC1 - 9414750 - Alameda, CA 20 mi51 min SW 7 G 8.9 57°F 67°F1015.3 hPa
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 21 mi79 min NW 14 G 18 56°F 56°F8 ft1015.1 hPa (+0.7)
OKXC1 - 9414776 - Oakland (Berth 34), CA 21 mi51 min SW 6 G 8 58°F 1014.7 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 21 mi51 min SW 8 G 9.9
OBXC1 21 mi51 min 57°F 54°F
LNDC1 22 mi51 min SSW 5.1 G 8.9 57°F 1014.7 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 23 mi57 min SE 8 56°F 1015 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 26 mi51 min SSW 11 G 17 57°F 1014.8 hPa
RCMC1 - 9414863 - Richmond, CA 26 mi51 min S 7 G 12
PRYC1 - 9415020 - Point Reyes, CA 36 mi51 min NW 9.9 G 15 56°F 55°F1014.3 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 38 mi51 min WSW 9.9 G 14 62°F 1013.5 hPa
UPBC1 40 mi51 min WNW 8.9 G 12
MZXC1 - 9415102 - Martinez-Amorco CA 40 mi51 min NW 12 G 14 66°F 69°F1013.3 hPa58°F
PCOC1 - 9415144 - Port Chicago, CA 44 mi51 min W 9.9 G 14 67°F 69°F1013 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 49 mi51 min NW 9.9 G 14 70°F 1012.5 hPa

Wind History for San Francisco, CA
(wind in knots)    EDIT      (on/off)   Help
12
PM
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
Last
24hr
SW11
G18
SW11
G20
SW11
G17
SW13
G20
W13
G21
SW12
G17
W12
G20
W10
G17
W5
G9
W5
G12
W6
G16
W9
G17
SW6
G11
W8
G12
SW3
G9
W8
G14
W5
G11
SW7
G11
SW5
G10
SW7
G11
W4
G9
SW4
G8
SW4
G9
SW6
G12
1 day
ago
SW8
G15
SW9
G15
SW11
G18
W8
G13
SW9
G16
W5
G12
SW5
G12
W7
G15
SW10
G17
SW7
G11
SW8
G15
SW6
G10
W9
G14
W9
G14
W8
G15
W8
G12
W8
G13
W10
G16
W9
G15
W8
G14
W10
G15
W8
G13
W9
G13
W7
G14
2 days
ago
W5
G11
W7
G13
W8
G16
W6
G12
W12
G20
SW14
G20
SW12
G16
W8
G13
W12
G17
W4
G8
W7
G11
W5
G9
W6
G9
SW7
G12
W7
G11
W5
G9
W5
G10
W3
G7
SW6
G9
SW6
G10
W5
G10
NW4
SW6
G9
SW9
G15

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Half Moon Bay Airport, CA6 mi74 minWNW 44.00 miFog/Mist55°F53°F94%1015.6 hPa
San Francisco, San Francisco International Airport, CA12 mi73 minWSW 119.00 miMostly Cloudy61°F52°F72%1014.6 hPa
San Carlos Airport, CA18 mi77 minW 1110.00 miA Few Clouds64°F53°F68%1014.6 hPa
Oakland, Metro Oakland International Airport, CA21 mi76 minW 910.00 miOvercast63°F55°F76%1014.7 hPa

Wind History from SFO (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 24hrW14W17
G25
W21W15W20
G26
W17
G25
W14
G25
W16
G25
W14
G23
W13W13W10W11W12W11W11W12W9SW10W10W12
G16
W10SW11W12
G21
1 day agoW15
G21
W16
G23
W16W18W18
G23
W17
G23
W14W17W15W12W14W10W14
G19
W13W9W13W15W13W13W14W11W13W15
G22
W17
2 days agoW17W18W19W18W21W18W17
G25
W13W14W10W8W10W6W9W9W5W5W5W5W10W9W11W11W15
G18

Tide / Current Tables for Half Moon Bay, California
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Half Moon Bay
Click for Map
Wed -- 01:53 AM PDT     5.39 feet High Tide
Wed -- 05:51 AM PDT     Sunrise
Wed -- 08:45 AM PDT     -0.63 feet Low Tide
Wed -- 11:01 AM PDT     Moonrise
Wed -- 03:46 PM PDT     5.15 feet High Tide
Wed -- 08:35 PM PDT     Sunset
Wed -- 09:27 PM PDT     2.25 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
4.55.25.454.12.81.40.2-0.5-0.6-0.20.71.93.14.255.14.84.13.32.62.32.32.7

Tide / Current Tables for South Channel, San Francisco Bay Approach, California Current
   EDIT      (on/off)   Help   One Week of Data
South Channel
Click for Map
Wed -- 12:35 AM PDT     1.09 knots Max Flood
Wed -- 03:48 AM PDT     -0.01 knots Slack
Wed -- 05:50 AM PDT     Sunrise
Wed -- 06:52 AM PDT     -1.84 knots Max Ebb
Wed -- 10:27 AM PDT     0.01 knots Slack
Wed -- 11:01 AM PDT     Moonrise
Wed -- 01:33 PM PDT     1.52 knots Max Flood
Wed -- 05:18 PM PDT     -0.00 knots Slack
Wed -- 07:37 PM PDT     -1.11 knots Max Ebb
Wed -- 08:36 PM PDT     Sunset
Wed -- 10:58 PM PDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
11.10.80.4-0.2-1-1.6-1.8-1.6-1-0.40.41.11.51.51.30.90.2-0.5-1-1.1-0.9-0.50

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 (15,3,4,5)
      (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.