281 FXUS66 KEKA 260724 AFDEKA AREA FORECAST DISCUSSION National Weather Service Eureka CA 1224 AM PDT Sat Jul 26 2025 .SYNOPSIS...Thunderstorm chances drop off for the weekend. Near normal to slightly below normal temperatures expected into early next week. Temperatures trend slightly upward towards the later parts of next week. && .DISCUSSION...The upper low that brought convection to mostly Trinity County on Friday moves to the east Saturday, taking most mid-level moisture with it. As a result, thunderstorm chances significantly decline into the weekend; however, isolated thunderstorms could still occur in the afternoon to evening hours in the Trinity Horn region both Saturday and Sunday with chances significantly less on Sunday. Late this weekend and into the middle of next week, high pressure is expected to generally remain east of the area. This will keep temperatures near seasonal normals with highs in the upper 80s to low 90s. Coastal stratus is expected to form each night during this time with the potential for some clearing into the afternoons. Thunder potential generally looks to remain low. Ensembles are hinting at another upper-low forming right off the coast, which may return thunderstorm chances by mid next week. This thunderstorm potential will be monitored. && .AVIATION...Extensive stratus offshore over the ocean will likely keep coastal terminals under IFR to LIFR conditions through the morning hours. Confidence in complete afternoon clearing is low. Low clouds and IFR ceilings will probably persist near or over coastal aerodromes. Some scattering out may eventually occur late in the day, however stratus and IFR conditions will probably build back quickly during the evening hours, so any improvement is probably going to be brief. VFR conditions are expected to continue over the inland areas with wrap around mid to high level convective debris clouds through early Saturday. Otherwise, cumulus is forecast to build again during the day with light to moderate turbulence near convective cells. Also, low level clouds and IFR conditions will be possible for the coastal valleys Saturday morning. Recent rainfall in the valleys of Trinity County may result in brief LIFR due to early morning fog. && .MARINE...A weak pressure gradient between an offshore ridge and an inland trough will keep winds gentle to moderate through the weekend. Northerlies will accelerate around Cape Mendocino and result in a narrow band of gusts around 30 kt through Saturday. Seas around 3 to 5 feet are expected, with the lowest waves expected nearest the coast. The sea state will be dominated by 2 to 5 foot wind waves and a small long period southerly swell. Northerly winds are forecast to increase early to mid next week, strongest over the outer waters and in the lee of Cape Mendocino. && .EKA WATCHES/WARNINGS/ADVISORIES... CA... None. NORTHWEST CALIFORNIA COASTAL WATERS... None. && $$ NOTE: The full forecast discussion is now regularly issued between 10 am/pm and 1 pm/am. Additional updates will be issued as needed. 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