Wednesday, April25, 2018 L-36.com


Marine Weather and Tides
Bayview, CA

Version 3.4
What's New / NOTES
3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.
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.

Sunrise 6:19AMSunset 8:08PM Wednesday April 25, 2018 10:58 AM PDT (17:58 UTC) Moonrise 2:41PMMoonset 3:23AM Illumination 79% Phase: Waxing Gibbous; Moon at 10 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
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PZZ410 730 pm pdt Tue mar 13 2018 a marine weather statement has been issued for the following areas... Coastal waters from pt. St. George to cape mendocino ca out 10 nm... Humboldt bay bar... At 729 pm pdt, doppler radar indicated a shower, capable of producing winds to around 30 knots. This shower was located 9 nm north of cape mendocino, moving northeast at 20 knots. Precautionary/preparedness actions... Water spouts are possible along with stronger Thunderstorms...locally higher waves...and lightning strikes. Boaters should seek safe harbor immediately until these storms pass. Mariners can expect gusty winds to around 30 knots...locally higher waves...and lightning strikes. Boaters should seek safe harbor immediately until this storm passes. && lat...lon 4080 12411 4080 12418 4075 12419 4073 12423 4070 12421 4068 12422 4070 12427 4071 12427 4065 12431 4063 12429 4063 12424 4062 12426 4063 12432 4047 12439 4057 12459 4095 12437 4086 12417 4076 12423 4085 12416 4082 12409 PZZ400 846 Am Pdt Wed Apr 25 2018
Synopsis for northern california waters..Light to moderate south to southwest winds will persist through Saturday as weak low pressure offshore slowly moves toward the coast. Seas will remain dominated by westerly swell and long period southwest swell through Saturday. Northerly winds and steep seas will build on Sunday afternoon and persist into early next week.

7 Day Forecast for Marine Location Near Bayview, CA
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location: 40.78, -124.2     debug


Area Discussion for - Eureka, CA
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Fxus66 keka 251130
afdeka
area forecast discussion
national weather service eureka ca
430 am pdt Wed apr 25 2018

Synopsis High pressure will maintain mainly sunny skies and
above normal temperatures through Thursday across interior
northwest california, while onshore flow brings cool and cloudy
conditions to coastal areas. An upper-level low will bring cooler
weather and some scattered showers Friday into the weekend.

Discussion
Mid and upper-level ridging is in control aloft while a weak
thermal trough at the surface has shifted inland. This will keep
onshore flow and persistent marine stratus along most of the
immediate northwest california coast today. This pattern will
promote above normal temperatures inland, with some low 80s in the
warmer interior valleys that remain beyond the influence of
marine air. Stable conditions and very light or calm winds in the
lowest several thousand feet of the atmosphere will not help clear
out the coastal clouds, which will likely only retreat to within
a few miles of the immediate coast this afternoon, keeping
locations like fort bragg, eureka, and crescent city in the 50s
most of today.

Heading into Thursday, an upper-level low offshore will drift
closer to our coast, perhaps allowing for a decrease in stability
and onshore flow, which may allow for some partial clearing of
coastal stratus for the afternoon hours. At the very least, inland
high temperatures will cool off by 4 to 8 degrees. Dry weather
will continue until Friday, when this upper-level low begins to
pass over our region, but there will be a slight chance of showers
and thunderstorms Thursday night over north-central and northeast
california.

Models have come into good agreement on the track of this upper-
low Friday and Saturday, drifting eastward along the california-
oregon border. This system will lack much moisture, and
precipitation will be most likely over the interior high terrain
where instability will be maximized. For this reason, despite the
high-confidence of some showers around northwest california Friday
afternoon through Sunday, have kept just chance probabilities
outside of the mountainous terrain. Parts of the forecast area may
escape with little or no precipitation; especially valley
locations south of CAPE mendocino. The main impacts of this system
will be to lower inland temperatures, with highs mainly in the
55 to 65 range Friday through Sunday. Will also need to keep an
eye out for isolated thunderstorms around the mountains of
northeastern mendocino and trinity counties each afternoon and
evening. Heading into next week, models diverge with how quickly
ridging will return to the west coast, so while there will be a
warming trend, how quickly that warming occurs will remain in
question. Either way, next week looks almost entirely dry.

Marine No marine hazards in effect for the next few days. Fairly
light winds and low seas in the NW california waters. The seas are
mostly from light to moderate westerly swells moving into our
waters.

By the second half of the weekend, winds will shift north and
increase. With the stronger north winds, we will have resultant
steep wind waves. Do expect hazardous marine conditions in store
from Sunday into early next week. Rcl

Aviation Widespread marine stratus covering the west coast from
southern california all the way up to oregon coast. Kacv was stuck
in lifr overnight. Slightly better conditions for kcec, but they
were still stuck in ifr. Ceiling heights were at around 400 to 600
feet in kcec and kacv. Overnight,VFR conditions remained in kuki.

Satellite imagery shows that the marine stratus was attempting to
expand into ukiah from the south.

For this morning, do expect lifr ifr conditions for kcec and kacv.

Condition at kuki is expected to deteriorate to MVFR ifr this
morning as the fog expand into the area.

Don't expect much improvement during the day for kcec and kuki, as
we continue to get onshore flow into the area. The marine stratus
will limit the amount of daytime heating. This will limit mixing and
thus allow the marine stratus to remain in the area. There maybe a
few hours that conditions will improve to MVFR ifr. For ukiah, do
expect stronger daytime heating and the fog should burn off by
midday.

For tonight, the lifr conditions will continue for both kcec and
kacv. Conditions will gradually weaken for kuki as fog tries to
redevelop in the area. Rcl

Eka watches warnings advisories
Ca... None.

Northwest california coastal waters... None.

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
HBYC1 - 9418767 - North Spit, CA 1 mi83 min W 2.9 G 4.1 49°F 52°F1018.7 hPa
46244 - Humboldt Bay, North Spit, CA 12 mi59 min 53°F6 ft
46022 - EEL RIVER - 17NM West-Southwest of Eureka, CA 18 mi69 min SSW 9.7 G 12 49°F 53°F6 ft1018 hPa (+0.9)47°F
46213 - Cape Mendocino, CA (094) 44 mi37 min 52°F7 ft

Wind History for North Spit, Humboldt Bay, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Arcata / Eureka, Arcata Airport, CA15 mi66 minWNW 510.00 miOvercast52°F48°F89%1018.7 hPa
Fortuna Rohnerville Airport, CA16 mi84 minNW 40.50 miOvercast50°F50°F100%1017.9 hPa

Wind History from ACV (wind in knots)
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Last 24hrW5W5W5W4W6W5W4SW5SW5SW4CalmCalmNW5CalmCalmCalmNW3N3CalmCalmCalmN5NW5NW5
1 day ago3Calm3W6SW5SW6SW6CalmSW3CalmE3CalmS3SE4E4E3E3CalmCalmCalmCalmE3CalmW5
2 days ago5W6NW17
G23
N14NW19NW20NW12NW13NW9NW7SE3S3S7SE5SE4CalmE3CalmCalmE3E3CalmCalmNW4

Tide / Current Tables for Bucksport, Humboldt Bay, California
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Bucksport
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Wed -- 03:09 AM PDT     2.46 feet Low Tide
Wed -- 04:23 AM PDT     Moonset
Wed -- 06:23 AM PDT     Sunrise
Wed -- 09:10 AM PDT     6.23 feet High Tide
Wed -- 03:32 PM PDT     0.26 feet Low Tide
Wed -- 03:41 PM PDT     Moonrise
Wed -- 08:07 PM PDT     Sunset
Wed -- 10:22 PM PDT     6.69 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
4.83.72.82.52.63.34.25.15.96.265.23.92.41.10.40.312.13.656.16.66.5

Tide / Current Tables for Mad River Slough, Arcata Bay, Humboldt Bay, California
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Mad River Slough
Click for Map
Wed -- 03:24 AM PDT     2.18 feet Low Tide
Wed -- 04:23 AM PDT     Moonset
Wed -- 06:22 AM PDT     Sunrise
Wed -- 09:26 AM PDT     6.53 feet High Tide
Wed -- 03:40 PM PDT     Moonrise
Wed -- 03:47 PM PDT     -0.01 feet Low Tide
Wed -- 08:07 PM PDT     Sunset
Wed -- 10:38 PM PDT     6.88 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
5.142.92.22.32.93.84.95.96.56.45.74.42.81.30.300.51.63.14.65.96.76.8

Weather Map and Satellite Images
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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.
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Wind Forecast for Eureka, CA (13,3,4,5)
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Ground Weather Radar Station Eureka, CA
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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.