Point St. George to Cape Mendocino CA out 10 NM Marine Forecast
| Rest Of Today...S Wind 10 To 15 Kt, Rising To 15 To 20 Kt This Afternoon. Seas 9 Ft. Wave Detail: Nw 9 Ft At 14 Seconds. Rain. |
| Tonight...S Wind 15 To 20 Kt. Seas 9 Ft. Wave Detail: S 4 Ft At 5 Seconds And Sw 3 Ft At 10 Seconds. Rain. |
| Tue...Se Wind 25 To 30 Kt With Gusts Up To 45 Kt. Seas 8 Ft. Wave Detail: Sw 5 Ft At 9 Seconds And Nw 7 Ft At 13 Seconds. Rain. |
| Tue Night...S Wind 25 To 35 Kt With Gusts Up To 60 Kt. Seas Around 9 Ft. Wave Detail: S 8 Ft At 8 Seconds And W 5 Ft At 12 Seconds. Rain. |
| Wed...S Wind 20 To 25 Kt With Gusts Up To 40 Kt. Seas 12 Ft. Wave Detail: S 10 Ft At 9 Seconds And W 9 Ft At 13 Seconds. Rain With A Chance Of Tstms. |
| Wed Night...S Wind 10 To 15 Kt. Seas 15 Ft. Wave Detail: Sw 7 Ft At 7 Seconds And W 15 Ft At 14 Seconds. Showers. |
| Thu...S Wind 15 To 20 Kt. Seas 14 Ft. Wave Detail: W 14 Ft At 15 Seconds. Rain Likely. |
| Thu Night...S Wind 15 To 20 Kt. Seas 12 Ft. Wave Detail: S 5 Ft At 7 Seconds And W 12 Ft At 14 Seconds. Rain. |
| Fri...Nw Wind 5 To 10 Kt. Seas 10 Ft. Wave Detail: W 10 Ft At 13 Seconds. Rain. |
| Fri Night...N Wind 5 Kt. Seas 10 Ft. Wave Detail: W 10 Ft At 13 Seconds. |
| Area Forecast Discussion ...CORRECTED National Weather Service Eureka CA 1230am PST Monday Nov 3 2025 Synopsis Rain is expected to return this afternoon and evening for Del Norte and northern Humboldt and then spread southward overnight. Risk for strong and damaging wind gusts will increase late Tuesday afternoon and persist through early Wednesday morning. Widespread heavy rain will increase the risk for urban and small stream flooding late Tuesday night and Wednesday. Periodic rain is expected to continue into Friday morning before rain tapers off later on Friday into Saturday. .KEY MESSAGES... - Periods of moderate to heavy rainfall and gusty south winds returns on Monday. - Strong Atmospheric River to bring strong and damaging winds, heavy rainfall and a risk for urban and small stream flooding Tuesday night and Wednesday. - Higher than normal tides next week with storm surge, promoting coastal flooding expected in Humboldt Bay-North Spit and Crescent City. - Periods of rain expected to continue Thursday through Thursday night and then taper off Friday through Saturday. Wet and unsettled weather returns this afternoon and evening for Del Norte and Humboldt as the next in a series of fronts with high PWATs (Precipitable Waters) impacts the area with rain and gusty south winds. This first system will be driven by a compact surface low swinging northeastward toward the Oregon Coast this afternoon. Southerly winds will increase along the coast ahead of the frontal boundary Monday morning. Strong southerly winds are forecast to develop over the coastal headlands and exposed ridges in Del Norte and Humboldt counties in the afternoon through early evening. Gusts from 35 to 45 mph is expected, especially in Del Norte County. HREF ensemble mean has peak wind gusts near 40 mph. Bumped winds up around Pt St George which may indeed gust to 45 mph or so. High-resolution models suggest a period of moderate to heavy rainfall arriving late afternoon for Del Norte and evening for SW Humboldt. Extreme hourly rates over 0.50in/hr will possible, 1 in 10 odds, over the Del Norte Mountains this afternoon and over the King Range this evening. Models continue to consistently show the front and plume of moisture sagging southward into southern Humboldt and NW Mendocino overnight. Moderate to heavy rain will likely persist overnight in southern Humboldt and NW Mendocino as the boundary eventually stalls by early Tuesday. Southeastern Mendocino and southern Lake may only get a few hundredths or a trace of rain by 4 AM. The next shortwave trough will rapidly approach on Tuesday and rain will once again increase throughout from south to north during the morning and afternoon on Tuesday. A second, stronger frontal system will intensify Tuesday night into Wednesday as a potent upstream trough deepens and a surface cyclone spins up offshore in response. Ensemble means and deterministic GFS (Global Forecast System) and ECMWF (European Centre for Medium-Range Weather Forecasts) remain in a good agreement with the deep trough becoming negatively tilted by 12Z Wednesday. This will send a plume of high PWATs (Precipitable Waters) and high IVT into NW CA. Ensemble means indicate a long duration moderate AR with a shorter duration of strong AR conditions. Widespread heavy rainfall is highly probable. Isolated thunderstorms may also occur. Storm motion appears to rapid for intense rates over 1 in/hr sitting in one spot. Strong damaging south winds are also probable (60-90% chance) as surface pressure gradient tightens Tuesday night and a low level jet at 925mb up to 70 kts develops along the coast. A well-mixed boundary layer near or along the surface front will allow for higher momentum air to mix down to the surface. There is a 40-60% chance of gusts greater than 40 mph for the lowest elevations. For higher elevations and coastal headlands, NBM indicates a 60-90% chance for wind gusts greater than 45 mph in Del Norte and Humboldt counties. ECMWF ensemble mean 6-hourly wind gusts are over 50 mph for the Del Norte Coast, specifically CEC and over 40 to 50 mph for the greater Humboldt Bay area, ACV, EKA and FOT. There are more extreme members from 60-75 mph in the ECMWF distribution. Stronger wind gusts over 55 mph are highly probable over the coastal mountains. A high wind watch has been issued as this appears to be a highly anomalous wind event for this time of year. It may end up as a wind advisory for the lower elevations, however would not be surprised if some the higher elevations venturi-effect RAWS gusts over 70 mph, specifically in SW Humboldt in the King Range. Otherwise, gusts from 35-55 mph appears more likely for the population centers. Winds this strong can still rip branches off trees and may even bring a few weaker trees down. The watch or advisory may need to be expanded into southern interior Mendocino and Lake. A watch for urban and small stream flooding may also be necessary Tuesday night into Wed. Models remain consistent with widespread heavy rain increasing Tuesday night into Wednesday morning. HREF and individual CAMS should shed more light on the rain intensity. Global models have been hitting this hard for the last 5 to 7 days, just the timing has varied. Another plume of moisture will take aim on the Pacific NW Thu-Fri and bring another round of moderate to locally heavy rain to NW CA. Once again there will be a risk for urban and small stream flooding as well as rock and mudslides in steep terrain. A break in the rain is forecast later on Friday into Saturday as the mid level flow amplifies in advance of another trough that is forecast to dig over the central Pacific. This next trough may bring more light to moderate rain as early as Sat. The frontal boundary may stall offshore or slow down and take til Sunday or Monday to arrive. Marine A large, long period WNW swell will slowly subside over the next few days. Northerly winds will trend much lower and continue to shift more southerly into Monday morning. Combined sea heigheights of slightly over 10 feet will continue from the short period seas and fading WNW swell. An area of low pressure will clip the waters Monday. This system has trended farther south increasing the magnitude of southerly winds for our waters. Winds are expected to gust to Gale strength Monday afternoon and evening for the northern outer zone 470 as the low clips the waters. A Gale Warning has been applied to this zone for Monday. A strong frontal system will begin moving in Tuesday when southerly winds quickly strengthen. Strong Gale conditions are forecast, with Storm force gusts over 50 kts Tuesday night and Wednesday morning. Short period seas will build to 15 to 17 ft Wednesday in response to the Storm force winds. A large post frontal westerly swell will then build in Thursday as southerly winds increase again from a secondary trough. Gale criteria may be met from this second system. JJW/JLW Hydrology Periods of locally heavy rain late this afternoon through tonight. Widespread heavy rain expected late Tuesday into Wednesday and potential for urban and small stream flooding will increase. More rain is probable for Del Norte and Humboldt Thu and Fri, but influx of moisture appears somewhat lower. This will need to be watched for minor flooding too. All main stem rivers are forecast to remain below monitor/action stage through at least Wednesday morning. Coastal Flooding Starting on Tuesday, astronomical high tides will approach or exceed 8 ft at the North Spit tide gauge. The highest tides, at around 8.5 ft will in occur in the late mornings through midday on Thursday and Friday. Moderate to strong southerly winds are forecast through this timeframe and will further contribute to a positive tidal anomaly. Water levels may reach 10 ft at North Spit when high tides align with the strong southerly winds. Currently, the strongest southerly winds are forecast Wednesday morning, but a slightly higher tide is forecast Thursday. Expect Coastal Flood Advisory issuance, with the possibility of a Coastal Flood Warning around Humboldt Bay if confidence increase of the southerly wind anomaly. The high tides, heavy rainfall, and tidal anomaly may require an expansion of an advisory along much of the coast Wednesday and Thursday. JJW/JLW. .EKA WATCHES/WARNINGS/ADVISORIES... CA... High Wind Watch from Tuesday afternoon through Wednesday morning for CAZ101-103-109. High Wind Watch from Tuesday afternoon through Wednesday afternoon for CAZ102-104>106-110. NORTHWEST CALIFORNIA COASTAL WATERS... Small Craft Advisory until 7pm PST Monday for PZZ450. Gale Watch from Tuesday morning through Wednesday morning for PZZ450-455. Small Craft Advisory until 3pm PST Monday for PZZ455-475. Small Craft Advisory until 1pm PST Monday for PZZ470. Gale Warning from 1pm to 9pm PST Monday for PZZ470. Storm Watch from Tuesday afternoon through late Tuesday night for PZZ470-475. For forecast zone information see the forecast zone map online: https://www.weather.gov/images/eka/zonemap.png |
Eureka CA Radar
Pacific Southwest Radar