Point St. George to Point Arena between 150 and 250 NM Offshore Forecast
| Tonight...N Winds 10 To 20 Kt. Seas 6 To 8 Ft. |
| Sat...N Winds 10 To 20 Kt, Becoming 10 To 15 Kt. Seas 5 To 7 Ft. |
| Sat Night...N Winds 10 To 20 Kt. Seas 5 To 7 Ft. |
| Sun...N To Nw Winds 10 To 20 Kt, Becoming Nw 10 To 15 Kt. Seas 4 To 6 Ft. |
| Sun Night...Nw Winds 10 To 20 Kt. Seas 4 To 5 Ft. |
| Mon...N To Nw Winds 10 To 15 Kt, Diminishing To 5 To 10 Kt. Seas 4 To 5 Ft. |
| Mon Night...N Winds 5 To 15 Kt, Becoming 5 To 10 Kt. Seas 4 To 5 Ft. |
| Tue...N Winds 5 To 10 Kt. Seas 4 To 5 Ft. |
| Tue Night...Variable Winds Less Than 5 Kt. Seas 4 To 5 Ft. |
| Wed...Variable Winds Less Than 5 Kt. Seas 4 To 5 Ft. |
| Wed Night...N Winds 5 To 10 Kt. Seas 4 To 5 Ft. |
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Area Forecast Discussion National Weather Service Eureka CA 1122am PDT Fri July 18 2025 Synopsis Conditions will remain hot and dry inland, while a deepened and a relatively persistent marine layer keeps temperatures cooler along some portions of the immediate coast. Cool down expected early next week. Strong ridging will build into the region following a weak upper trough. Already warm temperatures will continue to increase into the mid-90's across interior valleys for Saturday and Sunday. NBM probabilities for highs >90 degrees are >80% as far as Redway and Laytonville as warm temperatures chip away at the marine layer. Areas of Moderate HeatRisk in interior Trinity, Humboldt and Mendocino will be a concern for sensitive individuals. Breezy terrain driven winds expected across the interior each afternoon. Otherwise, daytime highs will be significantly dampened along the coast with a persistent marine layer. Areas of coastal drizzle are possible on Saturday morning, after which the marine inversion will begin to compress and remain slightly closer to the coast, likely no longer reaching Ukiah by Sunday. An approaching upper trough will help to tighten the coastal pressure gradient Sunday into Monday - gusty northerlies south of Cape Mendocino expected, including Lake County (SW flow in higher elevations of eastern Lake County). This will pose a slight fire weather concern as daytime RH's are still 25 to 30%. High pressure will begin to break down beginning early next week as a positively tilted upper trough over WA/OR begins to extend into NorCal. Temperatures are expected to cool off significantly with highs in the upper 70's to mid 80's (with isolated valleys potentially reaching 90) through midweek. Long range models show anomalously low heigheights sitting over the eastern Pacific/PNW through at least Wednesday with generally northerly flow and terrain driven afternoon winds expected. NBM beginning to hint at a chance for thunder Tuesday and Wednesday afternoon with cool upper temperatures and mid level moisture availability, but there is still high uncertainty. Marine High pressure is beginning to build back toward the coast over the eastern Pacific Ocean forcing a return of the northerly winds. The pressure gradient will continue to tighten into the weekend with moderate to strong northerly breezes Saturday and Sunday, with the strongest winds over the outer waters zones and downwind of Cape Mendocino. Seas will build in size as short period, steep wind waves form due to the persistent winds. Small craft advisories have been hoisted from Saturday to Sunday over the outer waters due to these steep seas and breezy winds. Winds and seas will subside early next week due to another upper level trough diving south over the coastal waters, weakening the surface high pressure gradient that causes our strong northerly winds. Light winds and low seas are anticipated for much of the coming work week. .EKA WATCHES/WARNINGS/ADVISORIES... CA... None. NORTHWEST CALIFORNIA COASTAL WATERS... Small Craft Advisory from 11pm Saturday to 5pm PDT Sunday for PZZ470. Small Craft Advisory from 3pm Saturday to 11pm PDT Sunday for PZZ475. For forecast zone information see the forecast zone map online: https://www.weather.gov/images/eka/zonemap.png |
Eureka CA Radar
Pacific Southwest Radar