Thursday, July29, 2021
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Marine Weather and Tides
Calpella, CA

Version 3.4
NOTICE
3/30/2021 -- ANZ330 has been split into ANZ331 and ANZ332. Click EDIT in Marine Forecast and select your new zone.
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 6:09AMSunset 8:28PM Thursday July 29, 2021 9:09 AM PDT (16:09 UTC) Moonrise 10:55PMMoonset 11:02AM Illumination 72% Phase: Waning Gibbous; Moon at 20 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- 853 Am Pdt Thu Jul 29 2021
Today..NW winds 10 to 15 kt. Wind waves around 3 ft. SWell S around 2 ft at 13 seconds.
Tonight..NW winds 10 to 15 kt. Wind waves 3 to 4 ft. SWell S around 2 ft at 13 seconds.
Fri..SW winds 5 to 10 kt. Wind waves 3 to 4 ft. SWell S around 2 ft at 13 seconds.
Fri night..W winds 5 to 10 kt. Wind waves 3 to 4 ft. SWell S around 2 ft at 13 seconds.
Sat..S winds around 5 kt. Wind waves 3 to 4 ft. SWell S around 2 ft at 15 seconds.
Sat night..W winds around 5 kt. Wind waves 3 to 4 ft. SWell S around 2 ft at 14 seconds.
Sun..W winds 5 to 10 kt. Wind waves 5 to 6 ft. SWell S around 2 ft.
Mon..NW winds 10 to 15 kt. Wind waves 5 to 6 ft. SWell S around 2 ft.
PZZ500 853 Am Pdt Thu Jul 29 2021
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Generally light to locally moderate gusty northwest winds across the northern outer waters. Breezy to gusty west winds each afternoon and evening across the san francisco bay north of the bay bridge otherwise light northwest winds through Monday. A moderate period southerly swell will persist in the waters.


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 291036 AFDEKA

AREA FORECAST DISCUSSION National Weather Service Eureka CA 336 AM PDT Thu Jul 29 2021

SYNOPSIS. Temperatures across interior portions of northwest California will steadily warm during the week, with highs ranging from 100 to 110 Friday afternoon. Conditions will then cool during the weekend into early next week. Otherwise, isolated to scattered thunderstorms will be possible across the interior mountains Thursday, Friday, and Saturday.

DISCUSSION. The overnight shift became interesting last night when a 8.2 magnitude earthquake was reported on the Alaska Peninsula just after midnight. Initial concerns for a tsunami along the west coast were quelled when ocean sensors lacked sufficient supporting data for large waves. Crescent City harbor which is very sensitive to even small perturbations was initially projected to see a 1.7 ft rise due to tsunami waves but that was later downgraded to less than a foot. The upshot for the North and Mendocino Coasts is that there was little to no impacts.

Weather wise two concerns are expected across NW CA over the next few days First. temperatures will continue rise prompting yet another Heat Advisory for inland valley locations on Friday as forecasted highs are expected to reach the low 100's and locally as high as 105. Secondly, atmospheric instability increases over the next few days as well as steep midlevel lapse rates become collocated with strong boundary layer destabilization occurs over the Trinity Alps and Yolla Bolly Mountains today. Sufficient CAPE for thunderstorm development is forecast to occur as a result during the afternoon/evening. Storm/shower activity will dissipate Thursday night, followed by another period of even stronger destabilization Friday afternoon that will favor greater storm coverage and possibly a risk of strong outflow winds and marginally severe hail given SBCAPE values ranging from 500-1500 J/kg and 0-6 km bulk shear values near 30 kt occurring in conjunction with hot deeply mixed boundary layer thermodynamic profiles. Fire starts will be a concern as well due to the potential of scattered cells promoting dry lightning (see Fire Weather Discussion below). A third round of generally isolated storm development will be possible Saturday afternoon as well.

AVIATION. The marine layer eroded significantly yesterday, making its return relatively slow overnight. The marine layer's compressed state, however, has guaranteed fog and LIFR conditions for coastal terminals. Continued interior heating has helped both compress the marine layer and further strengthen the inversion. This will likely keep LIFR to IFR conditions along the coast through at least early afternoon. The layer's thin nature, however, may still allow it to scatter out to VFR conditions for few hours in the afternoon before returning later in the evening. In the interior, VFR and clear conditions continue with isolated thunderstorms in eastern Trinity county being the only concern.

MARINE. Northerly winds persist throughout the forecast area. Today winds will remain in moderate to fresh breeze range with wind waves around 5ft. Winds and waves will pick up to strong breezes late tonight and Friday for the outer waters with slightly steeper waves to match. Isolated gusts are likely up to 27 kts. A small craft advisory has been hoisted late tonight into Friday to match these conditions. Winds and seas will then clam again headed into the weekend. Beyond wind waves, a southerly swell of 1 to 2 ft at 14 seconds will persist through today. A northwesterly swell of 1 to 2 ft at 8 seconds will begin to build into the area this weekend.

FIRE WEATHER. A hot and unstable environment is forecast to develop across the mountains of Trinity, northeast Mendocino, and far northern Lake Counties during the afternoon hours of Thursday, Friday, and Saturday. Isolated is possible across eastern interior areas today followed by scattered thunderstorm development on Friday that may expand westward . resulting in a Fire Weather Watch for the afternoon and evening hours on Friday. That activity will likely be dry given the presence of deep inverted-v thermodynamic profiles evident in model forecast soundings. Conditions will subsequently be favorable for fire starts due to dry thunderstorms occurring across dry fuels.

EKA WATCHES/WARNINGS/ADVISORIES. CA . Fire Weather Watch from Friday afternoon through Friday evening for CAZ201-203-204-211-212-277-283.

Heat Advisory from 10 AM to 8 PM PDT Friday for CAZ107-108- 110>115.

NORTHWEST CALIFORNIA COASTAL WATERS . Small Craft Advisory from 3 AM to 3 PM PDT Friday for PZZ470.

Small Craft Advisory from 9 PM this evening to 3 PM PDT Friday 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 mi51 min ENE 2.9 G 6 53°F 1015 hPa
46014 - PT ARENA - 19NM North of Point Arena, CA 33 mi29 min S 3.9 G 5.8 51°F 53°F1015.7 hPa51°F

Wind History for Arena Cove, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Ukiah Municipal Airport, CA9 mi13 minVar 310.00 miFair75°F52°F45%1013.3 hPa

Link to 5 minute data for KUKI

Wind History from UKI (wind in knots)
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Last 24hrCalmCalm34E6SE9W13
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W7N6N5N5CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm3
1 day agoCalm33SE7SE4SE5SE36N6N7NW3N5NW4CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm
2 days agoSE7S5S6S7SE10S10S10
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Tide / Current Tables for Albion, California
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Albion
Click for Map
Thu -- 03:14 AM PDT     4.70 feet High Tide
Thu -- 06:12 AM PDT     Sunrise
Thu -- 09:38 AM PDT     0.83 feet Low Tide
Thu -- 12:04 PM PDT     Moonset
Thu -- 04:26 PM PDT     5.31 feet High Tide
Thu -- 08:29 PM PDT     Sunset
Thu -- 10:45 PM PDT     2.01 feet Low Tide
Thu -- 11:56 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.13.84.44.74.64.13.22.31.40.90.91.32344.85.35.24.84.13.22.52.12

Tide / Current Tables for Mendocino, Mendocino Bay, California
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Mendocino
Click for Map
Thu -- 03:07 AM PDT     4.70 feet High Tide
Thu -- 06:12 AM PDT     Sunrise
Thu -- 09:36 AM PDT     0.83 feet Low Tide
Thu -- 12:04 PM PDT     Moonset
Thu -- 04:19 PM PDT     5.31 feet High Tide
Thu -- 08:29 PM PDT     Sunset
Thu -- 10:43 PM PDT     2.01 feet Low Tide
Thu -- 11:56 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.23.94.44.74.543.12.21.40.90.91.32.13.14.14.95.35.24.743.22.52.12

Weather Map
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GEOS Local Image of CentralWestCoast    EDIT
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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