Remember that sunny scene when the renamed King County Water Taxi kicked off the 2009 season a month ago? Despite subsequent bouts of stormy weather, the West Seattle-to-downtown foot ferry carried 20,361 passengers during its first month, according to numbers made public today by King County Council/King County Ferry District Board Chair Dow Constantine, who said, “These numbers bode well for a successful move to year-round Water Taxi operation next year.” More numbers: 663 riders on the average weekday, 911 on the average Saturday, 1,406 on the average Sunday (including April 5, when 3,429 people took advantage of all-day freebies). This year’s season is scheduled to run through October, and Seacrest dock improvements — to facilitate year-round operation starting next year — are planned for the off-season after that.