Monday, January25, 2021
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Marine Weather and Tides
Calpella, CA

Version 3.4
NOTICE
8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it.
8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue.
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 7:23AMSunset 5:27PM Monday January 25, 2021 12:50 PM PST (20:50 UTC) Moonrise 2:33PMMoonset 5:05AM Illumination 94% Phase: Waxing Gibbous; Moon at 12 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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PZZ540 Coastal Waters From Point Arena To Point Reyes California Out To 10 Nm- 841 Am Pst Mon Jan 25 2021
.gale warning in effect through late tonight...
Today..NW winds 25 to 35 kt with gusts up to 45 kt. Combined nw swell 12 to 14 ft at 12 seconds and W 4 to 6 ft at 18 seconds. A slight chance of rain.
Tonight..NW winds 20 to 30 kt with gusts up to 40 kt. Combined nw swell 11 to 13 ft at 14 seconds.
Tue..S winds 20 to 30 kt with gusts up to 35 kt. NW swell 11 to 13 ft at 15 seconds. Rain.
Tue night..S winds 25 to 35 kt with gusts up to 45 kt. Wind waves 6 to 7 ft. NW swell 8 to 10 ft at 14 seconds. Rain.
Wed..S winds 15 to 25 kt with gusts up to 30 kt. Wind waves 4 to 5 ft. W swell 9 to 11 ft at 13 seconds. Rain likely.
Wed night..S winds 15 to 20 kt with gusts up to 25 kt. Wind waves 3 to 4 ft. W swell 13 to 15 ft at 16 seconds. Rain likely.
Thu..SW winds 5 to 15 kt. Wind waves 1 to 2 ft. W swell 10 to 12 ft. Rain likely.
Fri..W winds 5 to 15 kt. Wind waves 1 to 2 ft. NW swell 6 to 8 ft. A chance of rain.
PZZ500 841 Am Pst Mon Jan 25 2021
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Gale force winds out of the northwest continue across the waters today as an upper level trough strengthens over california. These strong winds are merging with a northwest swell creating a very steep sea of roughly 12 to 20 feet at 11 to 14 seconds. Rain showers will also continue today with a slight chance of Thunderstorms this morning. Winds will become southerly Tuesday ahead of an approaching atmospheric river. Storm force southerly winds are anticipated for coastal zones beginning Tuesday evening. Additionally, buoy 46013 (bodega bay buoy) has been reported to have gone adrift.


7 Day Forecast for Marine Location Near Calpella, CA
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location: 39.21, -123.35     debug


Area Discussion for - Eureka, CA
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FXUS66 KEKA 251302 AFDEKA

AREA FORECAST DISCUSSION National Weather Service Eureka CA 502 AM PST Mon Jan 25 2021

SYNOPSIS. A mix of sun and clouds is expected today with some scattered rain and snow showers near the coast. Starting Tuesday afternoon a significant winter storm will bring rain, heavy low elevation snow, and strong winds through Wednesday evening. Thursday and into the weekend additional rain and snow is expected.

DISCUSSION. The upper level trough along the west coast continues to bring scattered showers to the area, currently they are mainly just off the coast. Flow has started to shift slightly and a few are starting to make it onto the Humboldt and Del Norte coasts. Snow levels look to be around 500 to 1,000 feet with a few flakes possibly making it to the coast. No accumulation is expected below 500 feet and higher elevations are expected to be less than an inch. There is a chance for thunderstorms over the waters today, however they are not expected to make in on land. Tonight showers will taper off quickly and a cold night is expected in most areas.

The upper level low and associated frontal boundary is currently over the Aleutians and is expected to drop rapidly south towards the area. The first rain associated with this front is expected to start moving onto the coast in the morning and quickly spread south and east. This front is expected to bring heavy precip to the area Tuesday evening and overnight. The heaviest rain amounts are expected in southern Humboldt, southern Trinity, as well as Mendocino and Lake counties. These areas are expected to 2 to 4 inches from Tuesday afternoon through Wednesday morning. This could bring some minor small stream flooding to portions of Mendocino and Lake counties, although this will be somewhat limited by the snow levels. Rainfall doesn't look to be convective enough to cause major impacts on the burn scars, although the LNU complex in southern Lake county will need to be monitored.

Cold air in place combined with a cold airmass moving is expected to bring very low snow levels, especially in the north. The big forecast challenge continues to be the snow levels. If snow levels are even 500 feet lower or higher this could change for the forecast significantly. Have added more details to Winter Storm Watch with current thinking on the snow levels. In general snow levels are around 1,000 to 1,500 feet in northern Humboldt and Del Norte county, and northern Trinity county. Farther south snow levels range from 2,000 to 3,000 feet. Just above the snow level snow amounts of 1 to 2 feet are possible. Adjusted forecast snow ratios in the valleys to a more realistic 10:1 and this lowered snow amounts slightly. The front also looks to move through slightly faster than previous expected and this has lowered snow amounts slightly, mainly in Del Norte county, but overall the forecast remains on track. Strong winds are expected just ahead of and with this front as well. Gusts to 60 mph are possible on the ridges of Humboldt and Del Norte counties Tuesday evening as the front moves through. Elsewhere will see windy conditions as well and some wind advisories will likely be needed to highlight gusts over 45 mph.

Models are showing the front moving through fairly quickly and it looks like there will be a break in the rain and snow Wednesday morning. For Wednesday afternoon through Thursday the forecast starts to diverge and the ensembles are not in very good agreement. The upper low low that brought the starts to dissipate and become an open trough. Shortwaves rotating around this trough are expected to bring periods of rain and snow. Snow levels are expected to generally be higher, over 3,000 feet in most areas. There will likely be periods of rain, but it is hard to pin down when at this time.

Friday looks like it will be mainly dry before the next system is expected to move in Friday night or Saturday. The cool and wet pattern is expected to continue into early next week. MKK

AVIATION. Mostly VFR conditions prevail this morning while scattered showers and gusty north winds slide southward just off the coast. A few stray showers may occasionally move onshore along the north coast through the day today, however these are not expected to significantly impair visibilities or lower ceilings. Breezy north winds pick up this afternoon before weakening again this evening, followed by fog and low cloud formation later tonight across interior valleys . possibly spilling over coastal Del Norte as well. Winds switch to southerly early Tuesday morning as another front approaches the coast, and strengthen through the day. This should help to mix out any coastal low cloud formation early tomorrow morning, however interior valleys will likely not clear until after daybreak. /TDJ

MARINE. Gusty northerly winds in the outer waters slowly weaken through the day today and drift southward, significantly weakening overnight tonight. Winds then switch to southerly early Tuesday morning and accelerate through the day as a front approaches the coast. Current model guidance is depicting surface winds reaching over 40 kts in the northern outers just in front of the front, with winds above the surface (925mb) breaking 60 kts. With the instability associated with the frontal passage, current thinking is that storm force gusts are possible as the front sweeps through the northern outers Tuesday afternoon and evening, mixing down these stronger winds . have hoisted a storm watch in response. Winds currently look to be slightly weaker in the surrounding zones, however solid gales are likely. Thus have issued gale watches for all other zones.

Winds quickly weaken behind the front Tuesday night before pulsing to SCY-level southerlies again during Wednesday. After Wednesday night, winds remain sub-advisory level and variable Thursday before turning southerly ahead of another series of fronts Friday heading into the weekend.

Seas slowly trend down today as both short period NNW energy and a longer period NW swell decay. A series of mid-period west to northwest swells are expected to continually reinforce themselves through this week, with the first couple coming in around 12 to 13 feet before a larger one moves in late Wednesday at around 16 ft at 16 seconds. Meanwhile, short-period southerly seas will pulse with the increasing winds of each passing front starting Tuesday . leading to a large and chaotic sea state through mid-week. Seas may drop below 10 ft late in the work week before more swells move in during the weekend. /TDJ

EKA WATCHES/WARNINGS/ADVISORIES. CA . Winter Storm Watch from Tuesday afternoon through Wednesday morning for CAZ102-105>108-110-111-114.

NORTHWEST CALIFORNIA COASTAL WATERS . Gale Watch from Tuesday morning through Tuesday evening for PZZ450.

Small Craft Advisory until 9 AM PST Tuesday for PZZ450-455-470.

Gale Watch from Tuesday morning through Tuesday evening for PZZ455-475.

Storm Watch from Tuesday morning through Tuesday evening for PZZ470.

Hazardous Seas Warning until 9 AM PST this morning for PZZ475.



Visit us at https://www.weather.gov/eureka

Follow us on Facebook and Twitter at: https://www.facebook.com/NWSEureka https://www.twitter.com/NWSEureka

For forecast zone information see the forecast zone map online: https://www.weather.gov/images/eka/zonemap.png


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ANVC1 - 9416841 - Arena Cove, CA 28 mi50 min WNW 8.9 G 14 47°F 51°F1012.9 hPa (-0.5)
46014 - PT ARENA - 19NM North of Point Arena, CA 33 mi30 min NNW 19 G 25 1012.8 hPa

Wind History for Arena Cove, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Ukiah Municipal Airport, CA9 mi54 minNW 910.00 miA Few Clouds48°F29°F48%1011.3 hPa

Link to 5 minute data for KUKI

Wind History from UKI (wind in knots)
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1 day agoN3CalmCalmNW8NW5S3CalmCalmCalmN3CalmNW3S4NE3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalm
2 days agoNW3NW7NW9W4W5SE4CalmCalmCalmCalmCalmW3CalmCalmCalmCalmCalmNE3CalmCalmCalmCalmCalmCalm

Tide / Current Tables for Albion, California
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Albion
Click for Map
Mon -- 02:13 AM PST     3.24 feet Low Tide
Mon -- 05:06 AM PST     Moonset
Mon -- 07:27 AM PST     Sunrise
Mon -- 08:00 AM PST     5.95 feet High Tide
Mon -- 02:34 PM PST     Moonrise
Mon -- 03:25 PM PST     -0.25 feet Low Tide
Mon -- 05:28 PM PST     Sunset
Mon -- 10:36 PM PST     4.47 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.83.43.23.33.84.45.15.75.95.753.82.41.20.2-0.2-0.20.31.1233.94.44.4

Tide / Current Tables for Mendocino, Mendocino Bay, California
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Mendocino
Click for Map
Mon -- 02:11 AM PST     3.24 feet Low Tide
Mon -- 05:07 AM PST     Moonset
Mon -- 07:27 AM PST     Sunrise
Mon -- 07:53 AM PST     5.95 feet High Tide
Mon -- 02:34 PM PST     Moonrise
Mon -- 03:23 PM PST     -0.25 feet Low Tide
Mon -- 05:28 PM PST     Sunset
Mon -- 10:29 PM PST     4.47 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.73.43.23.43.84.55.25.85.95.64.93.72.31.10.2-0.2-0.20.31.12.13.144.44.4

Weather Map
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wmap_P
GEOS 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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