Thursday, March30, 2017 L-36.com


Marine Weather and Tides
Myrtle, CA

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 6:59AMSunset 7:41PM Thursday March 30, 2017 3:43 AM PDT (10:43 UTC) Moonrise 7:59AMMoonset 9:59PM Illumination 9% 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
This is a Weather Statement Zone, please check the Date to see if it has expired
PZZ410 /o.can.keka.ma.w.0062.000000t0000z-161123t1115z/ 301 Am Pst Wed Nov 23 2016
.the special marine warning is cancelled... The affected areas were... Coastal waters from pt. St. George to cape mendocino ca out 10 nm... Humboldt bay bar... The Thunderstorms have moved out of the area and no longer pose a significant threat to boaters. Lat...lon 4083 12412 4082 12417 4085 12417 4076 12423 4081 12418 4082 12413 4080 12418 4077 12420 4075 12419 4075 12422 4070 12426 4071 12427 4044 12442 4044 12443 4050 12450 4087 12429 4087 12416 4086 12417 4085 12409 time...mot...loc 1058z 282deg 14kt 4078 12425 4051 12443 4020 12433
PZZ400 230 Am Pdt Thu Mar 30 2017
Synopsis for northern california waters..A weak cold front moved across the waters early this morning. Elevated northerly winds and steep seas will prevail across the waters today in the wake of the front.

7 Day Forecast for Marine Location Near Myrtle, CA
   Hourly   EDIT   Help
location: 40.8, -124.14     debug


Area Discussion for - Eureka, CA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus66 keka 292301
afdeka
area forecast discussion
national weather service eureka ca
401 pm pdt Wed mar 29 2017

Synopsis
Showers and higher elevation snow showers will persist through
mainly Thursday morning, before drier conditions return for the
weekend. However, a change in the weather pattern may offer
increased rainfall potential for portions of next week.

Discussion
Short term
(tonight through Thursday evening)
as a cold front crosses the region, shower coverage should increase
some overnight, with the highest rainfall amounts found over
interior portions of humboldt and del norte counties. With the
resultant increased cloud cover, low temperatures tonight will be a
few degrees warmer than last night, with near seasonal values
expected.

Precipitation will become more showery while decreasing in coverage
on Thursday. Colder air aloft will briefly filter into the region,
dropping snow levels down to near 4000 feet. Precipitation amounts
will be light with mixing ratios averaging about 6:1. Still, a light
dusting on a few area passes can't be ruled out. Otherwise, look for
decreasing cloud cover as we head through the day, with afternoon
highs topping out in the mid 50s to mid 60s, warmest across
mendocino county. With mainly clear skies and light winds, some
frost may develop across portions of the interior mendocino valleys
Thursday night/Friday morning.

Another forecast challenge will be the strength of the northerly
winds behind the front on Thursday and then again on Friday as high
pressure builds toward the coast. With northerly flow stacked up
from the surface to 500mb, there is a potential for breezy (15-
25mph) and locally windy (20-30mph) conditions at the coast.

Long term
(Friday evening through Wednesday)
the ridge will flatten out and weaken on Saturday in response to
another short-wave trough. The models continue to struggle on what
to do with this shortwave. The GFS continues to be the most bullish
with driving the shortwave through the ridge and generating showers
over the interior with daytime heating on Sunday. The ECMWF has the
trough developing farther east on Sunday with much less potential
for showers. For now will continue to maintain fairly low shower
chances considering the high level of uncertainty. Another front
should approach around mid next week and bring a new chance of rain.

/pd/db

Aviation
A passing cold front will continue to result in light to
moderate rain across humboldt/del norte counties through this
evening. This will result in oscillations between ifr and MVFR
conditions at cec and acv, both due to low ceilings and reduced
visibility, with occasional dips to ifr at cec. Uki may see a few
very light showers, with a brief period of MVFR ceilings overnight
tonight.VFR conditions are expected to tomorrow morning at all
terminals, after perhaps some patchy localized fog in some areas.

/brc

Marine
A 10 ft... 15 second northwest swell continues to be the
dominant wave group throughout the waters today as winds remain
mostly light. This swell will continue to propagate through the
waters over the next few days, gradually decaying as it does so.

However, while the northwest swell will gradually subside, winds
will turn to the north as a cold front passes, and will gradually
increase to around 15 to 25 kt by tomorrow morning. While there will
be minor fluctuations in wind speeds throughout the next several
days, this will more or less remain constant through late Monday,
allowing steep northerly seas to develop in addition to the decaying
swell. Meanwhile, another long period northwest swell will build
into the waters late in the weekend, further adding to the sea
state. The end result will be that combined wave heights will remain
in the 9 to 12 ft range through roughly Sunday, but with a mix of
periods ranging from 6 to 8 seconds out of the north, to 13 to 16
seconds out of the northwest. Seas will increase to 12 to 15 feet as
the previously mentioned larger swell builds early next week. /brc

Eka watches/warnings/advisories
Ca... None.

Northwest california coastal waters... Small craft advisory until 9 pm pdt this evening for pzz450-455.

Small craft advisory until 3 pm pdt Friday for pzz470-475.

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
HBYC1 - 9418767 - North Spit, CA 5 mi67 min NNW 22 G 24 51°F 52°F1023 hPa
46244 - Humboldt Bay, North Spit, CA 13 mi52 min 53°F10 ft
46022 - EEL RIVER - 17NM West-Southwest of Eureka, CA 21 mi53 min NNW 19 G 25 52°F 52°F10 ft1022.2 hPa (+1.2)46°F
46213 - Cape Mendocino, CA (094) 47 mi51 min 53°F10 ft

Wind History for North Spit, Humboldt Bay, CA
(wind in knots)    EDIT      (on/off)   Help
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
12
AM
1
AM
2
AM
Last
24hr
SE3
SE7
SE4
S5
S8
SE7
S6
S5
S5
S5
G9
S14
SW4
W19
SW13
G16
SW17
SW13
G16
SW14
G17
SW16
SW16
SW13
G16
W19
NW27
NW18
G23
NW18
1 day
ago
E5
E4
SE3
SE3
SE2
E4
S2
N2
N4
NW6
N6
NW8
NW7
NW8
N5
N3
NW7
NE3
NW3
SW4
NW3
SE6
SE4
SE6
2 days
ago
W18
W7
SW5
G8
SW11
NW11
NW12
NW8
G11
NW10
G14
N11
N6
N12
NW13
NW16
N15
N17
N15
N13
N13
N10
E6
W5
NW12

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Arcata / Eureka, Arcata Airport, CA13 mi50 minN 12 G 1910.00 miOvercast49°F46°F93%1022.9 hPa
Fortuna Rohnerville Airport, CA17 mi48 minNW 710.00 miOvercast46°F46°F100%1023 hPa

Wind History from ACV (wind in knots)
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
12
AM
1
AM
2
AM
3
AM
Last 24hrE6SE5E4E3E6E6SE5S3SE7SE6S5W9S7S8SW5SW7S7SW10SW10NW12NW19
G24
NW14
G21
N14N12
G19
1 day agoCalmCalmE5E5E4S3CalmW6NW5NW5NW7NW9NW9NW8NW4NW7SE3SE3CalmE5E5CalmCalmE5
2 days agoW9
G20
CalmCalmSE4N3NE3CalmNW9NW10NW8NW8NW14NW13NW16N11N9CalmNE3CalmCalmE4NE3E4E3

Tide / Current Tables for Eureka Slough Bridge, Humboldt Bay, California
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Eureka Slough Bridge
Click for Map
Thu -- 02:26 AM PDT     7.88 feet High Tide
Thu -- 07:02 AM PDT     Sunrise
Thu -- 08:36 AM PDT     -0.46 feet Low Tide
Thu -- 08:59 AM PDT     Moonrise
Thu -- 03:11 PM PDT     6.75 feet High Tide
Thu -- 07:39 PM PDT     Sunset
Thu -- 08:37 PM PDT     1.17 feet Low Tide
Thu -- 10:58 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
5.87.17.87.76.74.92.80.9-0.3-0.40.41.93.55.16.26.76.45.33.82.31.41.223.3

Tide / Current Tables for Humboldt Bay Entrance, California
   EDIT      (on/off)   Help   One Week of Data
Humboldt Bay Entrance
Click for Map
Thu -- 01:48 AM PDT     6.80 feet High Tide
Thu -- 07:03 AM PDT     Sunrise
Thu -- 08:34 AM PDT     -0.29 feet Low Tide
Thu -- 08:59 AM PDT     Moonrise
Thu -- 02:35 PM PDT     5.67 feet High Tide
Thu -- 07:40 PM PDT     Sunset
Thu -- 08:35 PM PDT     1.33 feet Low Tide
Thu -- 10:58 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
5.66.56.86.35.23.720.6-0.2-0.20.61.93.54.85.55.65.14.23.12.11.41.42.13.4

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 Eureka, CA (6,6,7,8)
      (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.