469 FXUS66 KEKA 072206 AFDEKA AREA FORECAST DISCUSSION National Weather Service Eureka CA 306 PM PDT Fri Oct 7 2022 .SYNOPSIS...Dry weather with above normal interior temperatures are forecast through next week. Coastal areas will continue to have low clouds and fog this weekend, with some clearing each afternoon. && .DISCUSSION...A strong ridge aloft will keep Northwest California in a dry weather pattern through next week. A warm and dry airmass will continue to result in above normal high temperatures in the interior, generally 80's to lower 90's. Overnight low temperatures have varied widely but were generally above normal too. Low temperatures for many upper elevations sites have been in the 60's to lower 70's while many valleys have been dipping down into the mid 40's to lower 50's under clear skies and low dew-points. The exception has been a few of the colder valleys in Trinity county such has Hayfork which has been near normal. A strong and low marine inversion with light onshore flow will keep coastal areas under a blanket of low clouds and fog through the weekend. The fog and low clouds will extend into the coastal river valleys each night, but should erode back toward the coastline or beaches each afternoon. Under a shallow moist marine air mass, temperatures probably will not warm up much. Temperatures will probably fall slightly (but still above normal) on Tuesday after the passages of a dry cold front. Moisture looks quite shallow, so some light precip or drizzle is not completely impossible. Northerlies will begin to ramp up Monday over coastal areas and coastal mountains, followed by gusty ridge level northeasterlies and easterlies on Tuesday. The cold front should wipe out the stubborn marine layer and bring more sustained sunshine to the coast with perhaps warmer daytime temperatures. Strong warming aloft and above normal high temperatures will return Wed and ramp up toward the end of next week. 850mb temperature anomalies increase to 10F or more. This will increase the potential for max temperatures in the upper 90's to around 100F for the hottest interior valleys late in the week if offshore flow persists. New record highs may be set for places like Ukiah. Coastal areas could warm up as well, but southerlies may bring stratus and fog back the coast by Friday. && .AVIATION...Light onshore winds alongside a strong coastal inversion has kept IFR along the coast most of the day. Satellite shows stratus and fog pulling back near to coast, possibly bringing a short period of scattered skies late this afternoon. HREF shows LIFR ceilings quickly reforming by sunset. With an increasingly shallow mariner inversion, tonight will likely bring even more consistent fog with quarter mile fog likely much of the early morning hours. Otherwise, VFR conditions are expected in the interior. /JHW && .MARINE...Northerlies are gradually increasing in the outer waters with fresh breezes expected later this evening. Short period seas are expected to increase with square seas around 7 feet. Conditions will remain much calmer near shore. Wind and seas are expected to slightly calm this weekend with short period seas dropping below advisory criteria late Saturday evening. Gentle winds with short period seas up to 4 feet are then expected with another round of stronger northerlies possible behind a weak frontal passage late Monday. Otherwise, a number of minor mid period swells continue to train across the area form the northwest and southwest. /JHW && .EKA WATCHES/WARNINGS/ADVISORIES... CA... None. NORTHWEST CALIFORNIA COASTAL WATERS... Small Craft Advisory until 9 AM PDT Saturday for PZZ470-475. && $$ 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