The “red water” is back off Alki on this sunny morning, tweets Russ Walker, sharing that photo – as reported here last weekend, it’s a NON-TOXIC single-cell organism called noctiluca. So now you know (if you didn’t already). Meantime, a Viaduct closure and lots more on the list of what’s up for the rest of today and tonight:

VIADUCT/99 CLOSURE: The Alaskan Way Viaduct/Highway 99 stretch between Battery Street and the West Seattle Bridge closes, both ways, for the weekend, starting at 11 tonight, as crews continue working to reinforce the section of The Viaduct under which the tunnel-boring machine will be traveling. The closure is scheduled to continue till 5 am Monday. As always during closure weekends, we will monitor traffic throughout the weekend (check the cams here) and report on any major complications. (Your tips are always appreciated too – text or voice, 206-293-6302, as well as via the WSB Facebook page and Twitter.)

BALLROOM DANCING: 1:30-3:30 pm, it’s the monthly event with Lauren Petrie at Delridge Community Center – details here.

RAINBOW BINGO: Tonight it’s the “Flower Power” edition at Senior Center of West Seattle in The Junction – be groovy! Doors open at 6, bingo at 7 – but you want to call NOW for a reservation – details on that, in our calendar listing.

VOLUNTEERING IN THE PARK: Today is Windermere‘s annual West Seattle Community Service Day, and their office will be closed so that about 50 people from Windermere and CW Title can volunteer at Lincoln Park, till about 1:30 pm. Their announcement:

This year, we will be doing some clean up and restoration at Lincoln Park. We will be fixing some of the trails to try and keep the trails safer and less muddy in the rainy season. We will also be working on removing weeds and invasive plants in some of the overgrown areas which will help with visibility and allow for park goers to hopefully feel a little safer walking through the park.

DINNER DEBUT AT ALKI CAFE: As first reported here last month, Alki Café (61st/Alki) is finally adding dinner, among other things, and tonight is the first night.

RELAY FOR LIFE OF WEST SEATTLE: 6 pm tonight, be at West Seattle Stadium to cheer on the all-night walking teams who’ll be raising money to fight cancer. WS’s well-known three-time survivor and mega-fundraiser Tracy Dart is scheduled to speak. 10 pm, it’s the luminaria ceremony, which is always a moving time to remember those who are fighting now, as well as those whose battle has ended. More info on the WS Relay website.

MOVIE NIGHT IN HIGHLAND PARK: HP Improvement Club presents another FREE movie night. “Movie hint: In a 2010 animated comedy, Princess Rapunzel has been locked in a hidden tower her entire life, her hair growing 70 feet. She is curious of the outside world and gets help to escape on an exciting and magnificent journey.” Doors open 6:30 pm, movie at 7, and HPIC adds, “Volunteers will be selling popcorn, candy and other movie fare. Bring blankets and pillows or sit in our chairs.”

FRIDAY NIGHT SKATING: Alki Community Center invites you to come skate tonight, 6:45-8:45 pm. Details here.

LIVE MUSIC: Tonight’s slate includes Ronin 3 with jazz at C & P Coffee Company (WSB sponsor), 6-8 pm … Blackline making its first appearance at Feedback Lounge (WSB sponsor), 9 pm … Skylark Café in North Delridge has a full slate – check it here … Heartland Café in the Admiral District has live music in the Benbow Room tonight; lineup here … (Reminder that we’re happy to list live music but if you don’t either e-mail us or post it to a regularly updated calendar of events on your website, we won’t know about it – thanks!)

‘TEACHER APPRECIATION’ SPECIALS AT SHANTI SALON AND SPA: The longtime WSB sponsor in the Admiral District is starting a month of special pricing for selected massage/facial services – if you’re a teacher (or other school employee – bring your school ID for proof)! It’s in effect today through July 15th. Details on this Facebook event page. (More about Shanti, here.)