Saturday, September23, 2017 L-36.com


Marine Weather and Tides
Las Lomas, 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 6:55AMSunset 7:02PM Saturday September 23, 2017 11:04 AM PDT (18:04 UTC) Moonrise 9:15AMMoonset 8:24PM Illumination 10% Phase: Waxing Crescent; Moon at 3 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
PZZ535 Monterey Bay- 844 Am Pdt Sat Sep 23 2017
.small craft advisory in effect from 2 pm pdt this afternoon through this evening...
Today..SE winds 5 kt...becoming W 10 to 20 kt in the afternoon. Wind waves 2 ft or less...becoming 3 to 4 ft in the afternoon. NW swell 2 to 3 ft at 11 seconds.
Tonight..NW winds 15 to 25 kt...becoming W 10 kt after midnight. Wind waves 3 to 4 ft in the evening...becoming 2 ft or less. NW swell 3 to 5 ft at 11 seconds.
Sun..E winds 5 kt...becoming W 5 to 15 kt in the afternoon. Waves 1 to 3 ft. NW swell 2 to 4 ft at 11 seconds.
Sun night..W winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 2 to 4 ft at 14 seconds.
Mon..W winds 10 to 20 kt. Wind waves 2 to 4 ft. NW swell 2 to 4 ft at 14 seconds.
Tue..W winds 10 kt. Wind waves 2 ft or less. NW swell 2 to 3 ft.
Wed..NW winds 10 kt. Wind waves 2 ft or less. NW swell 2 to 4 ft.
PZZ500 844 Am Pdt Sat Sep 23 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... High pressure offshore will bring light to breezy north to northwest winds today and through the coming days. The northwest swell train that first arrived several days ago will continue to weaken.

7 Day Forecast for Marine Location Near Las Lomas, CA
   Hourly   EDIT   Help
location: 36.86, -121.76     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus66 kmtr 231752
afdmtr
area forecast discussion
national weather service san francisco bay area
1052 am pdt Sat sep 23 2017

Synopsis High pressure building near the west coast will result
in dry weather, along with a warming trend, through at least the
middle of next week.

Discussion As of 08:53 am pdt Saturday... Cool start to the
morning region-wide with overnight lows generally in the 40s away
from the immediate coast where low mid 50s were common. Looking
for today to be the start of a warming trend that will extend into
the upcoming work week. Under a sunny sky, temperatures will warm
into the 70s to near 80 inland with upper 60s likely at the
coast this afternoon. The ongoing forecast remains on track and
no updates are needed at this time. Please see the previous
forecast discussion below for additional details.

Prev discussion As of 3:30 am pdt Saturday... Clear skies
across our entire CWA this morning along with a squashed marine
layer and a moderate offshore flow. Temperatures are generally
running a few degrees cooler than yesterday thanks in large part
to drier air and light winds. One exception is napa where speeds
are still just enough to keep them currently at 50. Look for parts
of the north bay to drop into the upper 30s (40s will be common)
with the remainder of our CWA generally in the 40s. Low 50s will
be mostly confined to the coast.

Temperatures will quickly rebound as abundant sunshine will
combine with a synoptic pattern that will feature the longwave
trough overhead starting to progress to the east. In addition, 850
mb values will increase 1-2c by the afternoon. Highs will
generally be in the 60s at the coast with 70s to lower 80s
inland. Winds will mostly be from the north or northeast with
gusty conditions possible over parts of the north bay. That has
lead to an issuance of a red flag warning starting this afternoon
for the north bay hills. Please see the fire weather section
below for more information.

Temperatures will continue to warm each day for Sunday into
Wednesday as a ridge near the coast builds into our region and
850 mb values go up each day. The flow should remain offshore
while the marine layer will be non-existent. This will translate
into the warm weather making it down to the beaches. By Tuesday
highs will be in the 80s at most coastal spots with 80s and 90s
inland. Beyond that the range in solutions greatly increases
although the majority of the models keep very warm readings going
at least into Friday.

The big challenge for the forecast is just how warm will it get
both at the coast and inland. 850 mb temperatures and 500 mb
heights are not that impressive and anomaly values are generally 2
standard deviations or less, so did not feel comfortable going
with extremely high numbers that some of the ensemble members are
suggestion (such as 90s to the coast). The current forecast keeps
the heat threshold in the low category at the worst, however if
the forecast trends upwards that could easily move to the moderate
level. Anyone with outdoor plans or at a location without air
conditioning should keep a close eye on the forecast.

Longer range guidance favors warmer than normal conditions
continuing all of the way into the middle of october. No
precipitation is expected.

Aviation As of 10:50 am pdt Saturday... WidespreadVFR through
the duration at all TAF sites. Breezy onshore winds by the
afternoon, especially along the coast. Models all showing a few
low marine clouds attempting to sneak into the monterey region
around sunrise tomorrow, however, confidence is low.

Vicinity of ksfo...VFR. West winds 14-16 kt after 22z.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals...VFR. Some low clouds possible around
sunrise.

Fire weather As of 3:30 am pdt Saturday... A warming and drying
trend will start this afternoon and continue at least into at
least Tuesday morning. In addition to the warm temperatures there
will be lowering humidity values and periods of gusty northeast
winds across the north bay hills, especially across the napa
county hills and the hills of northern sonoma county. Fine fuels
will continue to dry given the lack of marine air and humidity.

Climatology also favors a greatly chance for critical fire
weather conditions for the weekend and next week.

Marine As of 10:50 am pdt Saturday... High pressure offshore
will bring light to breezy north to northwest winds today and
through the coming days. The northwest swell train that first
arrived several days ago will continue to weaken.

Mtr watches warnings advisories
Tday Sca... Mry bay from 2 pm
sca... Pigeon pt to pt pinos 0-10 nm from 2 pm
sca... Pigeon pt to pt piedras blancas 10-60 nm from 2 pm
sca... Pt arena to pigeon pt 10-60 nm
sca... Pt pinos to pt piedras blancas 0-10 nm
public forecast: rgass bell
aviation: drp
marine: drp
fire weather: bell 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
ELXC1 - Elkhorn Slough Reserve, CA 3 mi80 min W 1.9 58°F 1012 hPa52°F
46092 - MBM1 16 mi60 min E 1.9 58°F 60°F1013.5 hPa (+1.2)
46240 - Cabrillo Point, Monterey Bay, CA (158) 18 mi44 min 63°F3 ft
MEYC1 19 mi89 min NNW 4.1 G 5.1 59°F 63°F1013.5 hPa
46114 - West Monterey Bay, CA 33 mi35 min 62°F7 ft
46042 - MONTEREY - 27NM West of Monterey Bay, CA 34 mi75 min N 3.9 G 5.8 59°F 61°F7 ft1013.4 hPa (+1.3)
46239 - Point Sur, CA (157) 40 mi43 min 58°F8 ft

Wind History for Monterey, 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
NW2
W3
NW7
W8
G13
W7
G13
W9
G15
W11
G16
W11
W10
G14
W6
G11
S2
G5
S2
S3
S4
S4
SE3
SE3
S1
E2
SE3
SE3
SE2
SE3
NE1
1 day
ago
W8
G14
W11
G21
W13
G19
SW10
G17
W12
G20
SW13
G18
W10
G15
W11
G15
W8
G13
W10
G14
W6
G10
W2
G6
W4
G7
SE5
S2
S3
SE4
S2
SE2
SE3
SE4
E3
SE3
NW1
2 days
ago
NW4
W8
G12
NW10
W9
G12
W9
G15
SW7
G13
SW10
G14
SW9
G14
SW9
G13
SW9
G14
W6
G10
SW7
SW5
G10
SW7
G10
W5
G8
SW5
G9
W8
G11
W12
G16
W7
G11
W6
G9
W11
W5
G8
W8
W10
G13

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Watsonville, Watsonville Municipal Airport, CA6 mi72 minSE 310.00 miFair60°F48°F67%1013.6 hPa
Salinas, Salinas Municipal Airport, CA16 mi72 minN 010.00 miFair60°F48°F65%1014.4 hPa
Monterey Regional Airport, CA19 mi71 minNW 310.00 miFair63°F50°F63%1014.8 hPa

Wind History from WVI (wind in knots)
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
10
AM
Last 24hr4S5SW8SW12SW14W11SW8SW6CalmE7NE3N3NW4NW4NW3NW4NW4NW5NW4CalmCalmCalmCalmSE3
1 day agoSW10
G16
SW12
G21
SW12
G20
SW15
G22
SW14
G26
SW15
G24
SW16
G21
W8W9
G16
W9CalmNW3NW5CalmNW3NW4NW4NW4NW3NW5NW5NW3CalmE3
2 days agoCalm4SW11SW9SW7
G15
SW7SW10SW10W7W5SW5SW6W7W9W7W7W6W6W4CalmNW3NW3CalmW7
G14

Tide / Current Tables for Elkhorn Slough railroad bridge, Monterery Bay, California
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Elkhorn Slough railroad bridge
Click for Map
Sat -- 01:29 AM PDT     4.87 feet High Tide
Sat -- 06:53 AM PDT     1.86 feet Low Tide
Sat -- 06:56 AM PDT     Sunrise
Sat -- 10:14 AM PDT     Moonrise
Sat -- 01:50 PM PDT     5.42 feet High Tide
Sat -- 07:01 PM PDT     Sunset
Sat -- 07:57 PM PDT     1.03 feet Low Tide
Sat -- 09:24 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
4.44.84.84.33.62.72.11.92.12.73.44.14.85.35.45.14.33.22.11.311.31.92.8

Tide / Current Tables for Point Pinos, California Current
   EDIT      (on/off)   Help   One Week of Data
Point Pinos
Click for Map
Sat -- 12:01 AM PDT     0.69 knots Max Flood
Sat -- 03:12 AM PDT     -0.00 knots Slack
Sat -- 05:45 AM PDT     -0.66 knots Max Ebb
Sat -- 06:56 AM PDT     Sunrise
Sat -- 09:20 AM PDT     0.00 knots Slack
Sat -- 10:15 AM PDT     Moonrise
Sat -- 12:07 PM PDT     0.58 knots Max Flood
Sat -- 03:06 PM PDT     -0.00 knots Slack
Sat -- 06:02 PM PDT     -0.80 knots Max Ebb
Sat -- 07:02 PM PDT     Sunset
Sat -- 09:25 PM PDT     Moonset
Sat -- 09:52 PM PDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.70.60.40.1-0.3-0.6-0.7-0.5-0.3-0.10.20.50.60.50.30-0.3-0.7-0.8-0.7-0.5-0.300.4

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 (14,3,4,5)
      (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.