Friday, July28, 2017 L-36.com


Marine Weather and Tides
Boulder Creek, 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 6:09AMSunset 8:19PM Friday July 28, 2017 6:04 AM PDT (13:04 UTC) Moonrise 10:49AMMoonset 10:51PM Illumination 24% 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
PZZ560 Pigeon Point To Point Pinos To 10 Nm- 238 Am Pdt Fri Jul 28 2017
.small craft advisory in effect from 1 pm pdt this afternoon through this evening...
Today..NW winds 5 to 15 kt...increasing to 15 to 25 kt in the afternoon. Wind waves 1 to 3 ft...increasing to 3 to 6 ft in the afternoon. NW swell 4 to 5 ft at 9 seconds. Patchy fog in the morning.
Tonight..NW winds 15 to 25 kt...decreasing to 5 to 15 kt after midnight. Wind waves 4 to 6 ft. NW swell 5 to 6 ft at 8 seconds. Patchy fog after midnight.
Sat..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 4 to 6 ft at 8 seconds. Patchy fog in the morning.
Sat night..W winds 5 to 15 kt. Wind waves 1 to 3 ft. Mixed swell nw 3 to 4 ft at 8 seconds and S 3 ft at 14 seconds. Patchy fog after midnight.
Sun..W winds 10 kt. Wind waves 2 ft or less. Mixed swell nw 3 to 4 ft at 8 seconds and S 3 to 4 ft at 14 seconds. Patchy fog in the morning.
Mon..W winds 10 kt. Wind waves 2 ft or less. Mixed swell nw 3 to 5 ft and S 3 to 4 ft.
Tue..W winds 10 kt. Wind waves 2 ft or less. Mixed swell nw 3 to 4 ft and S 3 to 4 ft.
PZZ500 238 Am Pdt Fri Jul 28 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Moderate to locally strong northwesterly winds will continue through the end of the week across the northern waters. Gusty winds will produce steep wind waves and fresh swell. Two tropical systems in the pacific will produce a long period southerly swell to arrive over the weekend. Interaction between the northwesterly wind waves and southerly swell will create choppy conditions across the waters.

7 Day Forecast for Marine Location Near Boulder Creek, CA
   Hourly   EDIT   Help
location: 37.13, -122.29     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus66 kmtr 281156
afdmtr
area forecast discussion
national weather service san francisco bay area
456 am pdt Fri jul 28 2017

Synopsis Slightly cooler temperatures are forecast for today
and Saturday as a weak upper trough approaches the northern
california coast. Even so, most inland areas will remain warm. A
gradual warming trend is then forecast from Sunday through much of
next week as a high pressure ridge strengthens over the western
united states. Thus, expect a prolonged period of very warm
temperatures inland. Mild conditions will persist near the coast.

Discussion As of 3:15 am pdt Friday... Satellite imagery shows
less inland low cloud coverage compared to 24 hours ago although
stratus is extending well down the salinas valley at this time.

The marine layer depth is more shallow - around 1000 feet deep per
the fort ord profiler, and surface pressure gradients are about
the same onshore with 2.3 mb from sfo to sac, but much stronger
from north-to-south with 5.4 mb from acv to sfo. This type of
gradient pattern lends itself to more clouds pushing into the
monterey bay and salinas valley and fewer clouds working into the
san francisco bay.

Meanwhile, a weak upper level trough is forecast to approach the
coast today which is expected to deepen the marine layer a little
today and tomorrow. Inland locations are expected to see similar
warmth to yesterday, with plenty of upper 80s and 90s for highs
today. Near-coastal areas could see a couple of degrees of
cooling depending on the strength of the sea breeze this
afternoon. Saturday is expected to be slightly cooler as the weak
trough moves through.

A strong ridge of high pressure currently centered over the rocky
mountain states will build and gradually shift to the west
beginning on Sunday and through the coming week. This will bring
warmer temperatures to the district through the remainder of the
forecast period. The ridge is progged to strengthen during the
latter part of next week for very warm to hot temperatures
across inland areas.

Aviation As of 4:56 am pdt Friday... For 12z tafs. Low clouds
have filled in along the coast this morning. A shallow marine
layer around 800 ft will keep low clouds confined to the coast and
terminals mainly cloud free with the exception of monterey bay
terminals. Light westerly flow will ramp up this afternoon.

Vicinity of ksfo...VFR conditions will prevail. Light to moderate
westerly winds expected to ramp up to 15 to 20 kt this afternoon.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... Lifr CIGS expected through the morning
hours with low clouds expected to scatter out around 16z. Light
winds.

Marine As of 2:38 am pdt Friday... Moderate to locally strong
northwesterly winds will continue through the end of the week
across the northern waters. Gusty winds will produce steep wind
waves and fresh swell. Two tropical systems in the pacific will
produce a long period southerly swell to arrive over the weekend.

Interaction between the northwesterly wind waves and southerly
swell will create choppy conditions across the waters.

Mtr watches warnings advisories
Tngt Sca... Pt arena to pigeon pt 10-60 nm
sca... Pt arena to pt reyes 0-10 nm
sca... Pt reyes to pigeon pt 0-10 nm
sca... Pigeon pt to pt piedras blancas 10-60 nm
public forecast: sims
aviation marine: cw
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
46042 - MONTEREY - 27NM West of Monterey Bay, CA 25 mi74 min 57°F 56°F7 ft1012.8 hPa (-0.3)
RTYC1 - 9414523 - Redwood City, CA 26 mi52 min NNW 4.1 G 5.1 60°F 74°F1012 hPa
46114 - West Monterey Bay, CA 28 mi64 min 56°F7 ft
46092 - MBM1 30 mi52 min Calm 54°F 56°F1012.5 hPa (-0.0)
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 35 mi74 min NW 16 G 18 55°F 56°F8 ft1012.7 hPa (-0.4)
ELXC1 - Elkhorn Slough Reserve, CA 36 mi79 min S 1.9 54°F 1012 hPa54°F
46240 - Cabrillo Point, Monterey Bay, CA (158) 40 mi43 min 57°F3 ft
MEYC1 42 mi88 min W 4.1 G 5.1 53°F 60°F1013 hPa
AAMC1 - 9414750 - Alameda, CA 44 mi52 min W 2.9 G 4.1 58°F 68°F1012.9 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 46 mi58 min WNW 5.1 G 6
PXOC1 - 9414311 - San Francisco (Pier 1), CA 46 mi52 min W 6 G 8 55°F 1011.4 hPa
PXSC1 47 mi52 min 56°F 55°F
OBXC1 47 mi52 min 58°F 55°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 47 mi52 min W 6 G 7 58°F 1012.4 hPa
FTPC1 - 9414290 - San Francisco, CA 48 mi52 min SW 5.1 G 8.9 54°F 59°F1012.8 hPa
46237 - San Francisco Bar, CA (142) 49 mi64 min 58°F6 ft

Wind History for Redwood City, CA
(wind in knots)    EDIT      (on/off)   Help
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
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
Last
24hr
N3
E2
E2
N2
N1
G5
N5
G8
N8
N8
NW7
G10
NW10
NW12
G15
N12
N13
N12
N8
N8
N6
NW4
NW3
NW4
NW4
NW4
NW4
NW4
1 day
ago
NW1
E4
G7
E3
NW3
NW5
NW6
N5
G9
N5
G10
N9
NW8
G11
NW12
G15
NW12
G16
NW13
G16
N14
N10
NW7
NW6
G9
NW4
NW4
NW4
N2
NW3
NW3
N4
2 days
ago
NW5
NW3
NW2
NW2
N3
G6
N3
G6
N4
G7
N9
G12
NW12
W13
NW11
NW10
NW11
NW10
NW10
N7
NW7
NW6
NW5
W3
NW2
NW3
N5
E1

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Mountain View, Moffett Field, CA24 mi68 minW 310.00 miFair62°F57°F86%1012.8 hPa

Wind History from NUQ (wind in knots)
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
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
Last 24hrCalmS3E4N3N6N5N6N7N9N10NW9N8NW8NW9N7N4NW4NW5CalmNW3NW5W3NW3W3
1 day agoCalmN3N6N4NE4N9
G15
N9N7N9N8N11N10NW12NW11NW6W4NW6NW6W4NW3CalmCalmCalmNE3
2 days agoSE3SE4CalmNE54N7N7N10N11N14N15
G19
N12
G19
N10N11N10N10N7N6N5N4NW3N4N4N3

Tide / Current Tables for Ano Nuevo Island, California
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Ano Nuevo Island
Click for Map
Fri -- 02:14 AM PDT     4.34 feet High Tide
Fri -- 06:11 AM PDT     Sunrise
Fri -- 08:45 AM PDT     0.51 feet Low Tide
Fri -- 11:49 AM PDT     Moonrise
Fri -- 03:26 PM PDT     4.92 feet High Tide
Fri -- 08:19 PM PDT     Sunset
Fri -- 09:44 PM PDT     1.70 feet Low Tide
Fri -- 11:51 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.444.34.23.72.921.10.60.50.91.62.63.64.44.94.94.43.72.92.21.81.72

Tide / Current Tables for Santa Cruz, California
   EDIT      (on/off)   Help   One Week of Data
Santa Cruz
Click for Map
Fri -- 02:21 AM PDT     4.29 feet High Tide
Fri -- 06:10 AM PDT     Sunrise
Fri -- 08:41 AM PDT     0.66 feet Low Tide
Fri -- 11:48 AM PDT     Moonrise
Fri -- 03:42 PM PDT     4.89 feet High Tide
Fri -- 08:18 PM PDT     Sunset
Fri -- 09:53 PM PDT     1.85 feet Low Tide
Fri -- 11:50 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.444.34.23.72.921.20.80.711.72.63.54.34.84.94.53.93.12.421.92

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 (9,2,3,4)
      (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.