Wednesday, April21, 2021
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Marine Weather and Tides
Happy Camp, CA

Version 3.4
NOTICE
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 6:25AMSunset 8:04PM Wednesday April 21, 2021 3:58 AM PDT (10:58 UTC) Moonrise 12:41PMMoonset 2:49AM Illumination 70% Phase: Waxing Gibbous; Moon at 9 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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PZZ450 Pt St George To Cape Mendocino Out 10 Nm- 216 Am Pdt Wed Apr 21 2021
.hazardous seas warning in effect through this afternoon...
Today..N winds 15 to 25 kt. Gusts up to 35 kt. Waves nw 10 ft at 9 seconds. Patchy fog.
Tonight..N winds 15 to 25 kt with gusts to around 35 kt. Waves nw 10 ft at 9 seconds. Patchy fog.
Thu..N winds 10 to 20 kt. Waves nw 9 ft at 8 seconds. Patchy fog.
Thu night..N winds 10 to 20 kt. Waves nw 8 ft at 8 seconds.
Fri..NW winds 5 to 10 kt. Waves nw 5 ft at 8 seconds.
Sat..S winds 10 to 15 kt. Waves sw 3 ft at 5 seconds...and W 2 ft at 10 seconds.
Sun..S winds 5 to 10 kt. Waves W 5 ft at 9 seconds.
PZZ400 216 Am Pdt Wed Apr 21 2021
Synopsis for northern california waters..Gale force northerlies will continue across the outer waters and localized areas of the inner waters, with gusty north winds and steep seas persisting into Thursday morning. Winds will become southerly by midday on Saturday. Otherwise, a small northwest swell will slowly diminish through midday on Thursday.


7 Day Forecast for Marine Location Near Happy Camp, CA
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location: 41.5, -123.35     debug


Area Discussion for - Medford, OR
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FXUS66 KMFR 210408 AFDMFR

Area Forecast Discussion National Weather Service Medford OR 908 PM PDT Tue Apr 20 2021

DISCUSSION. Most of the cloud cover over northern California has largely dissipated as a system moved southward. We received a spotter report of 0.05 inches of rain in Adin today in a shower, and no lightning was reported in either Modoc or Siskiyou County. Elsewhere, portions of Coos and Douglas County coasts are seeing some stratus associated with the marine layer. Overall, this is all on track with what is in the forecast, and so am not going to make changes with this package.

The warm and dry pattern continues this week, but it looks like an abrupt change is in the works beginning this weekend. For more information, please read the previous discussion below. -Schaaf

MARINE. Updated 800 PM PDT Tuesday 20 Apr 2021 . Wind speeds will peak late Wednesday afternoon. But, a thermal trough near the coast will support strong north winds through Thursday. Winds will be strongest south of Cape Blanco where seas will be very steep and hazardous beyond 5 NM from shore. Winds will ease some later Thursday into Friday, with steep seas lingering through Thursday evening. Winds will become southerly Friday night, when the first in a series of fronts will arrive. -DW

PREV DISCUSSION. /Issued 611 PM PDT Tue Apr 20 2021/

UPDATE . Updated the aviation section.

AVIATION . For the 21/00Z TAF Cycle . VFR ceilings and a few showers will linger in northern California this evening. Also, LIFR/IFR ceilings and visibilities cover most of the coast north of Cape Blanco. This coastal stratus is expected to expand along the coast and in to the Coquille Valley overnight. It will then burn off back to the beaches during the morning with lingering IFR again expected Wednesday afternoon north of Cape Blanco.

Elsewhere, VFR conditions are expected through Wednesday evening. -DW

MARINE . Updated 200 PM PDT Tuesday 20 Apr 2021 . A thermal trough near the coast will support strong north winds through Wednesday, especially south of Cape Blanco. Winds and seas will continue to increase into the evening, with hazardous seas developing beyond 5 NM from shore and south of Port Orford. Very steep and hazardous seas are expected again Wednesday afternoon. Winds will ease some Thursday into Friday, but steep seas will linger through Thursday evening. Winds will become southerly Saturday, when the first in a series of fronts will move onshore. -Sven

PREV DISCUSSION . /Issued 218 PM PDT Tue Apr 20 2021/

DISCUSSION . The latest radar image shows isolated a line of showers (likely from a deformation zone) aligned from west to east in southern Jackson and Klamath county. Additionally, showers are also confined to northern California. Over time, the line of showers in the above mentioned areas will continue to move south into California with decreasing cloud cover. Meanwhile mainly isolated showers will continue through this afternoon in northern California. This is all due to a weak upper low located along the California/Oregon border, what is bringing a weak trigger and cooler air aloft. The combination of the two will bring enough instability to generate additional isolated showers and a isolated storm or two this afternoon.

Any leftover isolated showers and storms will end early this evening with dry weather expected tonight with clearing skies for most of the area. The exception will be along the coast from about Cape Blanco north where marine stratus is expected to return. The marine stratus could push inland into the Coquille Basin, but that should be the extent of it. Elsewhere it will be clear.

After today, were back to dry and warm weather until the end of the week. A weak disturbance within a northwest flow will move through late Wednesday night with the main effect being an increased onshore flow. Therefore, we can expect marine stratus to make it's way further inland to include most, if not the entire Umpqua Basin by Thursday morning.

Friday will be dry as a ridge axis moves overhead. This will quickly move east Friday evening as an upper trough approaches from the southwest. The evidence is pretty solid we'll get our first measurable rainfall in our forecast area this morning, starting at the coast later Friday evening, then pushing inland mainly west of the Cascades Friday night. -Petrucelli

Extended discussion . Sat 24 Apr through Tue 27 Apr 2021.

The overall pattern will change to a much wetter regime in the extended period. The offshore long wave ridge which brought the dry weather to the area will break down and move onshore Friday. This will open the storm door and the upstream upper trough will move onshore Sunday night. Short waves ejecting from the trough will push a series of fronts onshore beginning Friday night. Sunday looks to be the wettest day overall.

The trough will move out to the east Monday and a weak ridge will build into the west coast. This looks to be a dirty ridge; short waves moving over the top of it will continue to support frontal activity that will bring more precipitation to the area. A significant front will move onshore Tuesday.

The ridge will break to the east of the area Tuesday, but it will build over the intermountain states as the upstream trough deepens offshore. Eventually there will be a break in the action, but the deterministic models and their ensembles indicate that this won't happen until next Thursday.

The 8 to 14 day outlook, valid Wed 28 Apr to Tue 04 May, shows greater chances for above normal temperatures and above normal precipitation for southern Oregon, and greater chances for above normal temperatures and near normal precipitation for northern California.

FIRE WEATHER . Updated 300 PM PDT Tue 20 Apr 2021 . As evidenced by the 1400+ acre wildfire (Ponina) that ignited near Beatty/Bly yesterday, early spring dryness has led to abnormally dry fuel conditions area wide, but especially across the east side. Contacts with local fuels officials today indicated moderate fire danger over portions of the west side and in most of NorCal, while FWZs 624/625 below 5000 feet in Oregon and FWZ 285 in California all indicated high fire danger.

High pressure will build in tonight, initiating a warming and drying trend that will continue into Friday evening. It will also be breezy in the afternoons and evenings, especially Thursday. This could bring borderline Red Flag conditions to portions of the east side.

A cooler and much wetter pattern will initiate Friday night as the first of several systems moves onshore. At this time it looks like this pattern will persist through at least the middle of next week.

MFR WATCHES/WARNINGS/ADVISORIES. OR . CA . None.

Pacific Coastal Waters . Small Craft Advisory until 11 AM PDT Thursday for PZZ350-356-370-376. Hazardous Seas Warning until 11 AM PDT Thursday for PZZ356-376.


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CECC1 - 9419750 - Crescent City, CA 47 mi59 min Calm G 1.9 47°F 48°F1015 hPa (-0.5)
46027 - ST GEORGES - 8NM West Northwest of Crescent City, CA 60 mi39 min NNW 25 G 33 46°F1015 hPa
46244 - Humboldt Bay, North Spit, CA 68 mi63 min 49°F11 ft

Wind History for Crescent City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Montague Siskiyou County Airport, CA51 mi66 minN 810.00 miFair45°F25°F46%1016.4 hPa

Link to 5 minute data for KSIY

Wind History from SIY (wind in knots)
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Last 24hrN9N12N10N10N13N11NE7E6S7N22
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1 day agoSE3CalmE3CalmCalmCalmCalmCalmW4--CalmN3NW6N15N14N11N11N18N11N10
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2 days agoCalmCalmN4CalmCalmCalmCalm3SW333SW7NE73N13N13N9NE5NE5N12NE9SE3SW3NE4

Tide / Current Tables for Crescent City, California
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Crescent City
Click for Map
Wed -- 01:18 AM PDT     3.47 feet Low Tide
Wed -- 03:53 AM PDT     Moonset
Wed -- 06:26 AM PDT     Sunrise
Wed -- 06:48 AM PDT     5.38 feet High Tide
Wed -- 01:44 PM PDT     Moonrise
Wed -- 02:05 PM PDT     0.30 feet Low Tide
Wed -- 08:04 PM PDT     Sunset
Wed -- 09:06 PM PDT     5.20 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.73.53.53.84.34.95.35.45.14.43.52.41.30.60.30.51.22.23.34.24.95.254.5

Tide / Current Tables for Crescent City, California (2) (expired 1989-12-31)
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Crescent City
Click for Map
Wed -- 01:18 AM PDT     3.46 feet Low Tide
Wed -- 03:53 AM PDT     Moonset
Wed -- 06:26 AM PDT     Sunrise
Wed -- 06:49 AM PDT     5.41 feet High Tide
Wed -- 01:44 PM PDT     Moonrise
Wed -- 02:05 PM PDT     0.31 feet Low Tide
Wed -- 08:04 PM PDT     Sunset
Wed -- 09:05 PM PDT     5.22 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.73.53.53.84.34.95.35.45.14.53.52.41.40.60.30.51.22.23.34.355.254.6

Weather Map
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NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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