Cape Mendocino to Point Arena CA from 10 NM to 60 NM Marine Forecast
| Tonight...N Wind 15 To 20 Kt, Easing To 10 To 15 Kt After Midnight. Seas 8 Ft. Wave Detail: Nw 6 Ft At 6 Seconds And Nw 5 Ft At 10 Seconds. |
| Mon...N Wind 5 To 10 Kt. Seas 5 Ft. Wave Detail: Nw 5 Ft At 9 Seconds And Nw 3 Ft At 15 Seconds. |
| Mon Night...N Wind 5 To 10 Kt. Seas 5 Ft. Wave Detail: Nw 4 Ft At 8 Seconds And Nw 4 Ft At 13 Seconds. |
| Tue...E Wind 5 Kt. Seas 5 Ft. Wave Detail: N 3 Ft At 7 Seconds And W 5 Ft At 14 Seconds. |
| Tue Night...Ne Wind 5 Kt. Seas 6 Ft. Wave Detail: N 3 Ft At 6 Seconds And W 5 Ft At 13 Seconds. |
| Wed...Se Wind 5 Kt. Seas 5 Ft. Wave Detail: W 5 Ft At 12 Seconds. |
| Wed Night...Se Wind 5 To 10 Kt. Seas 5 Ft. Wave Detail: W 5 Ft At 12 Seconds. Rain Likely. |
| Thu...Se Wind 10 To 15 Kt. Seas 6 Ft. Wave Detail: Se 4 Ft At 5 Seconds And W 5 Ft At 12 Seconds. Rain Likely. |
| Thu Night...S Wind 15 Kt. Seas 7 Ft. Wave Detail: Se 5 Ft At 5 Seconds And W 5 Ft At 11 Seconds. Rain. |
| Fri...Se Wind 20 To 25 Kt. Seas 9 Ft. Wave Detail: Se 5 Ft At 5 Seconds And S 8 Ft At 8 Seconds. Rain. |
| Fri Night...S Wind 15 To 20 Kt. Seas 11 Ft. Wave Detail: Se 5 Ft At 5 Seconds And S 7 Ft At 8 Seconds. Rain Likely. |
| Area Forecast Discussion National Weather Service Eureka CA 236pm PST Sunday Dec 28 2025 Synopsis Drier and colder weather this weekend is expected to last through Tuesday. Light rain return from south to north Wednesday night into Thursday, followed by a frontal system with moderate to locally heavy rain, high mountain snow and gusty winds on Friday. Quiet weather conditions are observed across the region as surface high pressure strengthens and ridging aloft builds across the West Coast through Monday. Mostly sunny and seasonably cool temperatures are being observed across Northwest California today, with some interior valleys seeing slow clearing. Offshore flow (east-northeast winds) is expected to increase slightly across the interior ridges this evening into Monday, coinciding with increasing subsidence. Gusts from 25 to 35 mph are most likely into Monday morning over the exposed ridges in the eastern portion of Lake County. Winds are expected to diminish throughout the day as the surface pressure gradient relaxes. Low temperatures tonight/Monday morning are forecast to be a few degrees warmer than this morning's readings, with coastal areas in the upper 30s to low 40s and interior valleys generally in the 30s. Areas of fog and patchy dense fog are anticipated along the shelter valleys. Ridging will continue to dominate the regional synoptics through Tuesday, maintaining dry and stable conditions. Adiabatic warming is expected to build Monday through Tuesday. Dry offshore flow, especially at night, will keep the air dry and promote a warming trend Monday and Tuesday. High's generally in the upper 50s to mid 60s are expected, but any areas that do have fog develop overnight will likely be slow to clear and may be lower than forecast. This is above normal for late December. Latest operational model guidances shows the ridge will begin to weaken and shift eastward on Tuesday as a trough from Gulf of Alaska interacts with a subtropical cut- off low. A large swath of moisture in advance of the trough will spread northward from Central California on Wednesday (New Year's Eve). Some light rain or sprinkles will be possible as early Wednesday night for Lake, Mendocino, southern Humboldt and southern Trinity counties. Expanded northward for northern Humboldt, northern Trinity and Del Norte early Thursday (New Year's Day). 6-hourly rain rates increase to 0.10-0.20 inches with local maximums perhaps up to 0.35 inches in the King Range Thursday night into Friday morning. Highest rain rates will most likely occur with frontal passage on Friday. The CW3E Tools for GEFS and ECMWF (European Centre for Medium-Range Weather Forecasts) EPS are showing an increasing chance (50-75%) of IVT greater than 250 kg/m/s arriving on Friday across the area. The GEFS and ECMWF ensemble controls are in a good agreement with IVT greater than 500 kg/m/s for the southern portion of the forecast area, including Mendocino and Lake counties. NBM probabilities of 24-hours precipitation exceeding 1 inch range from 30-45% for areas south of Cape Mendocino 4AM Thursday to 4AM Friday, with up to 60% for the King Range. While chances increase to 40-60% from 4am Friday to 4am Saturday, with 25-35% chances for northern Humboldt, northern Trinity and Del Norte counties. Stay tuned!/ ZVS&DUG Marine The northerly winds are starting to diminish as high pressure builds overhead. A local area of southerly winds is expected to developer along the coast south of Cape Mendocino. The wind driven waves are also diminishing and pushing farther off the coast. A northwest swell continues to move through the waters and is around 5 feet at 12 seconds. Monday through Wednesday morning winds are expected to be fairly light, generally less than 10kt. A new swell is expected to build into the waters on Monday, initially it looks to be around 4 feet at 14 seconds. This is expected slowly build through Tuesday to around 5 or 6 feet at 14 seconds. Wednesday afternoon the winds are expected to start to turn southerly again head of the next system. There is still some uncertainty on the timing this far out, but it looks like they will start to increase Thursday morning. The models are showing the potential for gales as early as Thursday evening. Gales are more likely on Friday, although have kept the forecast to near gale force gusts at this point due to the lingering uncertainty. These southerly winds will also already high tides and may cause coastal flooding, see coastal flooding section. MKK Coastal Flooding Another round of very high tides is coming up the 31st through 4th. At the North Spit Tide gauge on Humboldt Bay these are expected to be peak around 8.7 above MLLW on January 2nd and 3rd. There is still a lot of uncertainty on the winds, bu there is the potential for gale force southerly winds during this time period. The storm surge models are already showing nearly a foot of surge, but higher amounts are possible if the winds line up with the highest tides. This could yield quite a bit of flooding in the low lying areas around Humboldt Bay. Rain may also be occurring which exacerbate flooding surrounding Humboldt as creeks and low areas may not be able to drain during high tide. There are still a lot of variables, but this could bring 1 to 2 feet of saltwater onto to normally dry ground around Humboldt Bay. The impacts are less clear outside of Humboldt Bay and will be more driven by the wave size and running up much farther than normal. MKK .EKA WATCHES/WARNINGS/ADVISORIES... CA... None. NORTHWEST CALIFORNIA COASTAL WATERS... Small Craft Advisory until noon PST today for PZZ455. Small Craft Advisory until 6pm PST this evening for PZZ470- 475. For forecast zone information see the forecast zone map online: https://www.weather.gov/images/eka/zonemap.png |
Eureka CA Radar
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