Thursday, December13, 2018 L-36.com


Marine Weather and Tides
Mendocino, CA

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 7:22AMSunset 4:52PM Thursday December 13, 2018 2:23 PM PST (22:23 UTC) Moonrise 11:57AMMoonset 10:52PM Illumination 38% Phase: Waxing Crescent; Moon at 6 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
PZZ455 Cape Mendocino To Pt Arena Out 10 Nm- 846 Am Pst Thu Dec 13 2018
.small craft advisory in effect through Friday afternoon...
Today..S winds 5 to 10 kt. Waves nw 12 ft at 16 seconds.
Tonight..SE winds 15 to 25 kt. Gusts up to 35 kt. Waves sw 5 ft at 7 seconds...and nw 11 ft at 16 seconds.
Fri..S winds 20 to 30 kt...becoming sw 10 to 20 kt. Waves S 6 ft at 9 seconds...and nw 15 ft at 16 seconds. Rain.
Fri night..E winds 5 to 10 kt. Waves W 2 ft at 5 seconds... And nw 15 ft at 15 seconds.
Sat..SE winds 15 to 25 kt. Waves S 6 ft at 7 seconds...and nw 9 ft at 14 seconds.
Sun..S winds 10 to 20 kt. Waves S 8 ft at 10 seconds...and W 21 ft at 20 seconds.
Mon..SE winds 5 to 15 kt. Waves W 21 ft at 18 seconds.
PZZ400 846 Am Pst Thu Dec 13 2018
Synopsis for northern california waters..A cold front will move across the waters by Friday morning, generating a period of gale force southerly winds. Another bout of strong winds are forecast this weekend as a second storm approaches. A series of westerly swells will spread into the waters today through Monday, resulting in large and hazardous seas.


7 Day Forecast for Marine Location Near Mendocino, CA
   Hourly   EDIT   Help
location: 39.3, -123.8     debug


Area Discussion for - Eureka, CA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus66 keka 132221
afdeka
area forecast discussion
national weather service eureka ca
221 pm pst Thu dec 13 2018

Synopsis A cold front will bring a quick shot of rain, gusty
winds, and modest mountain snows on Friday. Another cold front
will sweep through the area on Sunday.

Discussion Skies were mostly sunny across the area today. High
clouds are forecast to gradually thicken and lower overnight
tonight ahead of an approaching frontal system. In addition, SE to
s winds will begin to increase late this evening. As a result of
the increasing clouds and downslope winds, forecast low
temperatures along the redwood coast are presently in the mid 40s.

However, it appears there will be some favorable radiational
cooling conditions after sunset, so temperatures could drop a few
degrees lower than forecast before rising again later in the
night.

Wind speeds gusts are expected to increase to just above advisory
criteria over portions of the N half of our area, specifically the
del norte coast and interior elevations above 1500 ft. A wind
advisory was hoisted by the midnight shift, and, other than a
slight extension to the expiration time, this remains unchanged.

This storm system will be progressive, with rainfall totals
expected to range from near one inch in the N mountains to just
over a quarter of an inch over the extreme southern coastal areas.

Coastal downsloping is expected to limit rainfall amounts a bit
along the coast, particularly along the redwood coast. This will
also likely delay the start time of the significant precipitation
in those area. Snow amounts in the highest elevations of N trinity
county will likely approach 6 inches, but this should be away
from major thoroughfares.

Saturday is expected to be a drier day, although some showers may
linger around the southern interior areas. Another fast-moving
storm system will transit the area on Sunday. Integrated moisture
transport (ivt) with this system is more impressive, but, again,
the progressive nature should keep localized flooding potential
low. There is the potential for a bit more convective
precipitation with this storm, so will need to evaluate the
potential for burn scar issues as we get closer to the event.

Another storm system may affect the area on Tuesday of next week,
but indications are that this feature will mainly affect the
pacific nw, with the best chances of rain in our area over the n
zones. Temperatures will be near to slightly above normal through
the period. Sec

Aviation Mainly clear skies have been prevailing across the
region today.VFR conditions are expected to continue tonight as a
frontal system approaches, however increasing south-southeast winds
aloft ahead of the front may result in low level wind shear toward
early Friday morning. MVFR and brief ifr conditions will be possible
through the day on Friday as rain develops right behind the front.

Marine An active weather pattern across the north pacific
will continue to result hazardous ocean conditions through early
next week. A mid-period westerly swell will slowly subside tonight,
however another mid period swell group will build on Friday. Seas
are forecast to reach warning criteria on Friday. A frontal system
will move into the coastal waters late tonight, bringing gusty
southerly winds by Friday morning. Gale warnings are in effect for
the northern waters where winds are expected to peak around 40 kt
around sunrise or shortly thereafter on Friday. Winds should die
down by Friday night. A second storm system will approach on
Saturday, resulting in another round of gale force winds on Sunday.

This second storm has also been generating large westerly swell that
will spread into the waters on Sunday. This long period swell will
combine forces with steep southerly wind waves on Sunday, resulting
in seas around 25 feet or so. Winds should quite down some on
Monday, however seas will likely remain quite elevated and perhaps
still around 20 ft or so.

Beach hazards... A mid period westerly swell may result in breaking
waves around 20 ft north of CAPE mendocino on Friday. A much more
significant westerly swell is expected to build Sunday into Monday.

This long period west swell will build to 20+ feet, which may result
in breakers over 30 feet. A high surf advisory or warning will be
issued as we near the event. We have hoisted a weather story graphic
to call attention to this beach hazard. People planning any beach
activities should exercise caution and stay farther back from the
surf and off of jetties. Beach conditions will remain unsafe and
hazardous through at the early portion of next week.

Eka watches warnings advisories
Ca... Wind advisory from 3 am to 11 am Friday for caz101-102-104>106.

Northwest california coastal waters...

small craft advisory until 4 am Friday for pzz450.

Gale warning from 4 am to 3 pm Friday for pzz450.

Small craft advisory until 9 pm this evening for pzz470.

Gale warning from 9 pm this evening to 3 pm Friday for pzz470.

Small craft advisory until 2 pm Saturday for pzz455-475.

Visit us at http:

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
46014 - PT ARENA - 19NM North of Point Arena, CA 10 mi33 min S 7.8 G 9.7 57°F 56°F12 ft1021.1 hPa53°F
ANVC1 - 9416841 - Arena Cove, CA 27 mi35 min SSW 6 G 7

Wind History for Arena Cove, CA
(wind in knots)    EDIT      (on/off)   Help
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
1
PM
Last
24hr
NW5
G9
W3
G6
W4
NW4
E3
E3
E4
E4
G7
E4
E2
G6
NE4
G8
E4
G8
E3
G7
E4
E7
E9
E9
E9
E9
E6
W1
SW3
S5
S5
G9
1 day
ago
W7
G11
NW3
G9
NW3
G7
NW3
E1
G4
E1
E3
--
E2
SW1
N1
G5
W4
G8
NW3
G9
NW3
G6
W4
G8
SW2
G6
W4
S2
E3
NE2
NW2
G6
W2
G5
NW5
G10
W8
G11
2 days
ago
NW8
G13
W8
G12
W5
G10
W4
G7
N1
E3
G6
E2
E4
E3
NE4
G7
NE1
G5
E2
NE2
SW1
G4
W2
G7
SW3
G7
S2
NE3
G7
E2
G5
NW3
W3
G7
NW4
G10
W6
G10
NW5
G8

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Ukiah Municipal Airport, CA34 mi27 minN 010.00 miFair61°F28°F30%1021.3 hPa

Wind History from UKI (wind in knots)
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
1
PM
2
PM
Last 24hr3W5W4CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmN3CalmCalm
1 day agoN6CalmCalmCalmNW7NE6S4CalmE3CalmNE3--N10NE5CalmCalmNW3CalmCalmN3CalmN3CalmCalm
2 days agoNW7W5W3SW3CalmW3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmN4N4Calm3Calm

Tide / Current Tables for Mendocino, Mendocino Bay, California
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Mendocino
Click for Map
Thu -- 03:53 AM PST     4.67 feet High Tide
Thu -- 07:26 AM PST     Sunrise
Thu -- 09:28 AM PST     3.19 feet Low Tide
Thu -- 11:56 AM PST     Moonrise
Thu -- 02:17 PM PST     4.48 feet High Tide
Thu -- 04:52 PM PST     Sunset
Thu -- 09:20 PM PST     0.55 feet Low Tide
Thu -- 10:52 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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
11
pm
2.33.244.54.74.54.23.73.43.23.23.53.84.24.54.443.32.41.50.90.60.61.1

Tide / Current Tables for Point Cabrillo, California Current
   EDIT      (on/off)   Help   One Week of Data
Point Cabrillo
Click for Map
Thu -- 12:57 AM PST     0.86 knots Max Flood
Thu -- 04:29 AM PST     -0.00 knots Slack
Thu -- 06:40 AM PST     -0.58 knots Max Ebb
Thu -- 07:26 AM PST     Sunrise
Thu -- 10:26 AM PST     0.00 knots Slack
Thu -- 11:56 AM PST     Moonrise
Thu -- 12:49 PM PST     0.44 knots Max Flood
Thu -- 03:26 PM PST     -0.00 knots Slack
Thu -- 04:52 PM PST     Sunset
Thu -- 06:43 PM PST     -0.99 knots Max Ebb
Thu -- 10:38 PM PST     0.00 knots Slack
Thu -- 10:52 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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
11
pm
0.80.90.80.60.2-0.2-0.5-0.6-0.4-0.3-0.10.10.40.40.30.1-0.2-0.6-0.9-1-0.8-0.5-0.20.1

Weather Map and Satellite Images
       (on/off)   HelpWeather Map
wmap_P
GOES Local Image of CentralWestCoast    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Eureka, CA (17,4,5,8)
      (on/off)   Help

Ground Weather Radar Station Eureka, 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.