Monday, July24, 2017 L-36.com


Marine Weather and Tides
Emerald Lake Hills, 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 6:06AMSunset 8:24PM Monday July 24, 2017 9:47 AM PDT (16:47 UTC) Moonrise 6:35AMMoonset 8:32PM Illumination 1% Phase: Waxing Crescent; Moon at 1 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- 926 Am Pdt Mon Jul 24 2017
Today..S winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 4 to 6 ft at 10 seconds. Patchy fog late in the morning.
Tonight..S winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 3 to 5 ft at 9 seconds. Patchy fog after midnight.
Tue..S winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 3 to 5 ft at 9 seconds. Patchy fog in the morning.
Tue night..SW winds 10 kt. Wind waves 2 ft or less. NW swell 3 to 5 ft at 9 seconds. Patchy fog after midnight.
Wed..W winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 3 to 4 ft at 9 seconds. Patchy fog.
Thu..W winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 3 to 5 ft. Patchy fog.
Fri..W winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 4 to 6 ft. Patchy fog.
...san francisco bar/fourfathom bank forecast..... In the deep water channel...combined seas 2 to 4 ft with a dominant swell period of 10 seconds. Across the bar...combined seas 3 to 5 ft with a dominant swell period of 10 seconds. Maximum ebb current of 1.1 knots at 05:00 pm Monday and 2 knots at 04:30 am Tuesday.
PZZ500 926 Am Pdt Mon Jul 24 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... A weak low pressure system off the california coast will result in light to moderate southerly flow along the coast. Northerly winds will return midweek as low pressure moves inland and high pressure builds over the eastern pacific.

7 Day Forecast for Marine Location Near Emerald Lake Hills, CA
   Hourly   EDIT   Help
location: 37.44, -122.34     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus66 kmtr 241542
afdmtr
area forecast discussion
national weather service san francisco bay area
842 am pdt Mon jul 24 2017

Synopsis Cooler conditions can be expected today and Tuesday
due to a deepening marine layer and increased onshore flow.

Warming is then expected during the second half of the week as an
upper ridge builds back across california. Aside from some
possible coastal drizzle mist during the next few nights early
mornings, no precipitation is expected through the forecast
period.

Discussion As of 08:41 am pdt Monday... Based off of the fort
ord profiler the marine layer rapidly deepened overnight and is
now around 2000 feet in depth. This is due to the mid upper level
low and associated trough approaching the california coast this
morning with low clouds spreading well inland to many valley
locations. With this, mist has been reported throughout the
morning, especially near the coast. Will see these low clouds
burn-off through the morning over the valleys with the potential
for some coastal areas to stay under cloud cover a good portion of
the day. This marine push has also resulted in a decent cool down
region-wide with many locations showing temperatures a good few
to several degrees cooler than 24 hours ago. Overall, the ongoing
forecast remains on track and only made minor adjustments to the
sky cover based off of current satellite trends. Please see the
previous forecast discussion below for additional details.

Prev discussion As of 3:00 am pdt Monday... The marine layer
which has been under 1,000 for several days has deepened overnight
to over 1,5000 feet as a shortwave trough and upper level low
approaches the coast. At the same time the surface flow has
switched to more pronounced from the west. All of these factors
will lead to cooler conditions today for nearly all locations,
especially those that are away from the coast. Far inland towns
that were in the 90s to lower 100s on Sunday will drop 5 to 10
degrees today while closer to water only a few degrees of cooling
can be expected. Similar conditions can be expected on Tuesday.

The synoptic pattern will undergo a change for the second half of
the week as a ridge of high pressure rebuilds toward our region.

This will lead to warmer weather going into next weekend. Most
areas will return to values that we have had recently with very
warm readings likely for many inland spots.

Next week remains worth keeping an eye on with the ECMWF showing
the ridge strengthening to almost 600 dm at 500 mb. Latest gfs
has a slightly weaker ridge although still brings in impressive
values for the western conus. ECMWF ensemble members continue to
show a substantial spread next week, however members with the
highest temperature are well in the advisory level (case in point
san jose in the lower 100s). Far from a done deal, but will
definitely need to be closely monitored. Current 6 to 10 and 8 to
14 day forecast from CPC favors warmer than normal conditions.

Aviation As of 04:19 am pdt Monday... Increased onshore flow has
led to a deeper marine layer. Southerly flow along the coast has
also allowed clouds to fill into the N bay. ExpectingVFR this
afternoon. Clouds push inland again tonight.

Vicinity of ksfo... CIGS impacting east side of bay, but sfo should
be in a hole. Will watch closely, but conf is low on cigs
impacting sfo. Gusty winds this afternoon. Better chance for cigs
tonight at sfo.

Sfo bridge approach... CIGS at or below 1k through 1630-1700z.

Monterey bay terminals... Ifr CIGS clearing after 17z.VFR this
afternoon.

Marine As of 04:23 am pdt Monday... A weak low pressure system
off the california coast will result in light to moderate
southerly flow along the coast. Northerly winds will return
midweek as low pressure moves inland and high pressure builds
over the eastern pacific.

Mtr watches warnings advisories
Tday Sca... Sf bay
public forecast: rgass
aviation: mm
marine: mm
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 8 mi47 min E 2.9 G 5.1 62°F 73°F1010.9 hPa (+1.0)
AAMC1 - 9414750 - Alameda, CA 23 mi47 min SSW 1 G 1.9 62°F 68°F1012 hPa (+1.0)
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 25 mi47 min NW 2.9 G 5.1
PXSC1 25 mi47 min 61°F 57°F
LNDC1 25 mi47 min S 1 G 1.9 61°F 1011.5 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 25 mi47 min N 4.1 G 6 60°F 1010.4 hPa (+0.7)
OBXC1 25 mi47 min 59°F 56°F
FTPC1 - 9414290 - San Francisco, CA 26 mi47 min WSW 7 G 11 58°F 61°F1011.8 hPa (+0.8)
OKXC1 - 9414776 - Oakland (Berth 34), CA 26 mi47 min NW 5.1 G 7 59°F 1011.5 hPa (+0.9)
46237 - San Francisco Bar, CA (142) 29 mi47 min 57°F4 ft
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 29 mi57 min S 9.7 G 14 56°F 58°F6 ft1011.2 hPa (+1.1)
PPXC1 - 9414847 - Richmond (Point Potrero), CA 32 mi47 min W 8.9 G 14 60°F 1011.7 hPa (+0.8)
RCMC1 - 9414863 - Richmond, CA 34 mi47 min SW 6 G 8.9 58°F 62°F1011.4 hPa (+0.7)
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 34 mi57 min SSE 9.7 G 12 55°F 56°F4 ft1011.7 hPa (+1.0)
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 43 mi47 min W 8 G 12 59°F 1011 hPa (+0.6)
MZXC1 - 9415102 - Martinez-Amorco CA 43 mi47 min W 13 G 17 60°F 68°F1011.1 hPa (+0.8)58°F
PCOC1 - 9415144 - Port Chicago, CA 45 mi47 min W 16 G 21 60°F 69°F1010.7 hPa (+1.1)
46042 - MONTEREY - 27NM West of Monterey Bay, CA 45 mi57 min 55°F 55°F6 ft1012.1 hPa (+1.2)
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 48 mi47 min NW 14 G 18 63°F 1010 hPa (+1.2)

Wind History for Redwood City, CA
(wind in knots)    EDIT      (on/off)   Help
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
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
Last
24hr
N4
N6
NW8
N9
N12
N15
N16
N15
N13
G16
N10
G13
N10
N8
NW8
NW6
NW5
NW6
NW3
W3
NW5
NW4
NW4
NW5
N3
E3
1 day
ago
N4
N3
N4
N5
N9
NW8
G11
NW11
NW11
N12
G15
N11
G14
N13
NW9
N6
NW4
NW4
NW4
NW6
NW3
NW3
NW4
NW3
W3
NW1
N2
2 days
ago
NE1
N8
N9
N11
NW10
W14
G17
W16
W16
G21
W17
G21
W17
G21
W14
G18
W10
NW7
W4
SW3
S4
S3
S2
S3
S4
--
S1
SE2
N1

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Carlos Airport, CA8 mi60 minVar 410.00 miPartly Cloudy63°F57°F83%1011.8 hPa
Half Moon Bay Airport, CA10 mi52 minSSE 910.00 miOvercast57°F55°F94%1011.2 hPa
San Francisco, San Francisco International Airport, CA12 mi51 minESE 510.00 miA Few Clouds63°F54°F73%1011.3 hPa
Palo Alto Airport, CA12 mi57 minN 010.00 miMostly Cloudy63°F59°F88%1011.5 hPa
Mountain View, Moffett Field, CA15 mi51 minNNE 410.00 miMostly Cloudy65°F57°F76%1011.8 hPa
Oakland, Metro Oakland International Airport, CA19 mi54 minN 010.00 miMostly Cloudy64°F55°F75%1011.5 hPa
Hayward, Hayward Air Terminal, CA19 mi53 minN 010.00 miMostly Cloudy64°F52°F65%1012.2 hPa
San Jose, San Jose International Airport, CA22 mi54 minSSE 310.00 miA Few Clouds64°F55°F73%1011.3 hPa

Wind History from SQL (wind in knots)
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
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
Last 24hr3N6N5N8N11N11NW10NW8NW8NW7N5CalmN3NW5NW4NW5NW4NW3NW4NW5NW4NW5Calm4
1 day agoNE444NE7NW5NW7N8N7N8NW10NW8N5N5N3NW3CalmN3NW4CalmNW3NW3NW3CalmCalm
2 days ago3NE93W7W6W11W12W13W14
G17
W12W13W14
G17
W12W9NW4NW5NW3W3SW4CalmCalmCalmNW333

Tide / Current Tables for Smith Slough, San Francisco Bay, California
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Smith Slough
Click for Map
Mon -- 01:25 AM PDT     9.02 feet High Tide
Mon -- 06:06 AM PDT     Sunrise
Mon -- 07:34 AM PDT     Moonrise
Mon -- 08:48 AM PDT     -1.25 feet Low Tide
Mon -- 03:13 PM PDT     7.57 feet High Tide
Mon -- 08:23 PM PDT     Sunset
Mon -- 08:50 PM PDT     2.15 feet Low Tide
Mon -- 09:31 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
7.88.98.986.34.11.90.1-1-1.2-0.51.1356.77.57.36.34.83.42.42.22.94.4

Tide / Current Tables for San Mateo Bridge, South San Francisco Bay, California Current
   EDIT      (on/off)   Help   One Week of Data
San Mateo Bridge
Click for Map
Mon -- 02:07 AM PDT     -0.00 knots Slack
Mon -- 05:43 AM PDT     -2.33 knots Max Ebb
Mon -- 06:06 AM PDT     Sunrise
Mon -- 07:34 AM PDT     Moonrise
Mon -- 09:06 AM PDT     0.01 knots Slack
Mon -- 11:59 AM PDT     2.34 knots Max Flood
Mon -- 03:33 PM PDT     -0.00 knots Slack
Mon -- 06:19 PM PDT     -1.30 knots Max Ebb
Mon -- 08:23 PM PDT     Sunset
Mon -- 09:06 PM PDT     0.00 knots Slack
Mon -- 09:31 PM PDT     Moonset
Mon -- 11:47 PM PDT     1.78 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.610.1-0.8-1.7-2.2-2.3-1.9-1.2-0.11.22.12.32.11.50.6-0.4-1-1.3-1.2-0.8-0.10.91.6

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 (12,3,4,5)
      (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.