Friday, April26, 2019 L-36.com


Marine Weather and Tides
Trinidad, 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 6:20AMSunset 8:07PM Thursday April 25, 2019 10:43 PM PDT (05:43 UTC) Moonrise 12:43AMMoonset 10:17AM Illumination 58% Phase: Waning Gibbous; Moon at 21 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
PZZ450 Pt St George To Cape Mendocino Out 10 Nm- 806 Pm Pdt Thu Apr 25 2019
Today..N winds 5 to 15 kt. Waves nw building to 8 ft at 11 seconds.
Tonight..N winds 5 to 15 kt. Waves nw 5 ft at 6 seconds...and nw 4 ft at 11 seconds.
Fri..N winds 5 to 15 kt...rising to 15 to 25 kt. Waves N 7 ft at 7 seconds.
Fri night..N winds 15 to 25 kt. Waves nw 10 ft at 9 seconds.
Sat..N winds 20 to 30 kt. Waves nw 10 ft at 10 seconds.
Sun..N winds 10 to 20 kt. Waves nw 9 ft at 9 seconds.
Mon..N winds 15 to 20 kt. Waves nw 9 ft at 9 seconds.
PZZ400 806 Pm Pdt Thu Apr 25 2019
Synopsis for northern california waters..Moderate north winds will increase to near gale or gale force for Friday afternoon through Saturday generating steep short-period seas. In addition, a modest mid- period northwest swell will slowly diminish through Friday morning.


7 Day Forecast for Marine Location Near Trinidad city, CA
   Hourly   EDIT   Help
location: 41.06, -124.14     debug


Area Discussion for - Eureka, CA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus66 keka 252141
afdeka
area forecast discussion
national weather service eureka ca
241 pm pdt Thu apr 25 2019

Synopsis Warm temperatures can be expected across interior areas
through the weekend, with seasonally mild conditions along the
coast. Generally dry conditions will persist through next week. A
cooling trend will begin this weekend leading to more seasonal
temperatures next week.

Discussion High pressure is in place over the region this
afternoon. A weak shortwave approaching the pacific northwest
brought fairly widespread stratus to the coast this morning. Some
breaks have developed in the stratus this afternoon, but some
areas remain cloudy, especially south of CAPE mendocino. Tonight
this stratus is expected to expand again, although it may be
limited on the del norte coast.

Friday morning this shortwave moves past the area and winds will
increase during the day. This will help stratus clear out more
quickly and winds will increase through the afternoon. Gusts to 25
mph are expected late in the afternoon.

Saturday is expected to see high pressure over the area. Cooler
air aloft will slowly filter. This will keep inland temperatures
slightly cooler and the coastal inversion will be weaker. This
should keep stratus to a minimum, although it is still possible
in the eel river valley and possibly around humboldt bay. Breezy
north winds will increase slightly along the coast with gusts to
30 mph possible.

Sunday and Monday the pattern is expected to persist, although
winds at the coast will gradually weaken and the potential for
stratus will increase each day.

Monday night into Tuesday a stronger upper level trough is moving
down the north. The current trajectory keeps it mainly over land
and it will likely be fairly dry. If it moves slightly farther
west this could bring some showers to the interior or even rain
across the area, but currently it is expected to stay dry. This
trough will bring significantly cooler temperatures to the
interior areas as well, near seasonal normals. This cooler airmass
will also weaken the marine inversion and that should help to
reduce stratus along the coast. Wednesday and Thursday the area is
expected to remain in fairly cool northwest flow as several
shortwaves bring reinforcing shots of cold air to the region. This
should also limit the coastal stratus. Mkk

Aviation Widespread stratus was in place along the coast and
inland river valleys this morning. This afternoon it has clear
back to the coast in some areas, but others remain ifr. These
could clear briefly this evening, but tonight this stratus is
expected to expand again. Confidence is low on exactly how
widespread it will be on the del norte coast due to offshore flow
increasing up there. Friday morning this shortwave moves past the
area and winds will increase during the day. This will help
stratus clear out more quickly and winds will increase through the
afternoon. Gusts over 20 kt are expected late in the afternoon
along the coast. Inland areas will generally remainVFR, aside
from some of the river valleys that may see morning stratus. Mkk

Marine The combination of high pressure offshore and a
thermal trough over the central valley will continue to produce
gusty northerly winds over the coastal waters for the next several
days. Additionally, a passing upper level disturbance will yield
a slight increase in winds by late Friday, spurring a gale watch
across the outer waters through Saturday afternoon. This may need
to be extended into Saturday night. Meanwhile, slightly lower
winds and calmer seas can be expected for the next 24 hours or so
across the nearshore waters, with higher winds and seas mostly
confined to areas immediately downwind of CAPE mendocino. Guidance
does suggest that stronger winds and steeper seas will gradually
expand into the inner waters by Friday and into the weekend,
possibly necessitating some additional headlines for those zones
in later forecast packages. Aside from the steep wind driven seas,
the only other wave group of note is a small mid period swell on
the order of 3 to 5 feet which will continue to propagate through
the coastal waters through early Friday. CB mkk

Eka watches warnings advisories
Ca... None.

Northwest california coastal waters...

gale watch from Friday afternoon through Saturday afternoon
for pzz470.

Small craft advisory until 3 pm pdt Friday for pzz470.

Gale watch from Friday evening through Saturday afternoon for
pzz475.

Small craft advisory until 9 pm pdt Friday for pzz475.

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
46244 - Humboldt Bay, North Spit, CA 16 mi44 min 53°F5 ft
HBYC1 - 9418767 - North Spit, CA 21 mi68 min 52°F1019.2 hPa
46022 - EEL RIVER - 17NM West-Southwest of Eureka, CA 32 mi34 min NNE 9.7 G 12 51°F1019.4 hPa
CECC1 - 9419750 - Crescent City, CA 47 mi50 min S 12 G 14 52°F 53°F1018.1 hPa

Wind History for North Spit, Humboldt Bay, CA
(wind in knots)    EDIT      (on/off)   Help
Last
24hr
1 day
ago
2 days
ago

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Arcata / Eureka, Arcata Airport, CA5 mi51 minN 08.00 miFair48°F46°F96%1019.2 hPa

Wind History from ACV (wind in knots)
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
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
Last 24hrSE3S6S5SE4SE4CalmCalmCalmCalmCalmCalmW3W5W5W4W5W4NW7NW6NW8N6CalmCalmCalm
1 day agoN7NW8NW7NW5NW8N5NW5N6N3SE3S5SW5S6W6W7NW106NW75NW7NW6NW3S4SE3
2 days agoCalmCalmCalmE3E3CalmE3SE4E3CalmSW3CalmW5W5W6W5NW17
G21
NW14NW17NW13NW15NW6NW11N8

Tide / Current Tables for Trinidad Harbor, California
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Trinidad Harbor
Click for Map
Fri -- 02:28 AM PDT     Moonrise
Fri -- 05:01 AM PDT     5.15 feet High Tide
Fri -- 06:21 AM PDT     Sunrise
Fri -- 12:13 PM PDT     Moonset
Fri -- 12:21 PM PDT     0.42 feet Low Tide
Fri -- 03:19 PM PDT     Last Quarter
Fri -- 07:34 PM PDT     4.75 feet High Tide
Fri -- 08:08 PM PDT     Sunset
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
3.33.644.655.254.43.62.61.60.80.40.511.82.73.64.34.74.74.54.13.6

Tide / Current Tables for Mad River Slough, Arcata Bay, Humboldt Bay, California
   EDIT      (on/off)   Help   One Week of Data
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


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 (1,6,7,8)
      (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.