We start today’s daily preview with a traffic alert/reminder:

VIADUCT CLOSED ALL WEEKEND: As detailed on the WSDOT website, the Alaskan Way Viaduct and Highway 99 south to the West Seattle Bridge are *closed for the weekend only* (reopening early Monday). From the Battery Street Tunnel north to Valley Street, 99 is closed for four days (reopening early Wednesday). Above, the “live” image from a stretch of 99 where concrete-repair work will be under way, among other things.

Now, all the reasons you don’t need to leave anyway:

GREAT CROSS-SOUND RACE: At 9 am, this rowing race presented by Sound Rowers starts just off the Alki Boardwalk, heads across toward Bainbridge, and comes back.

HUB AND SPOKE COURSE @ CAMP LONG: Two sessions today for adults and teens to try out Camp Long‘s challenge course, starting at 9:45 am – details in our calendar listing. (5200 35th SW)

‘HOLD ON TO YOUR BUTTS’: As previewed here earlier this week, the Surfrider Foundation will be out on Alki starting at 10 am to campaign against cigarette-butt litter, far more toxic than you might think.

ALKI BEACH 5K REGISTRATION/PACKET PICKUP: 10 am-2 pm at West Seattle Runner (WSB sponsor), you can pick up your packet for tomorrow’s Alki Beach 5K, or sign up if you haven’t already (online signup is now over) and want to beat the pre-race rush tomorrow morning. (California/Charlestown)

DUWAMISH RIVER FESTIVAL: Noon-4 pm, it’s a free festival with boat/kayak rides, entertainment, and more, at Duwamish Waterway Park on the river’s bank in South Park – here’s our preview with the music/dance (etc.) schedule. Co-sponsors include WSB and our partner site The South Park News. (7900 10th Avenue South)

ALKI POINT LIGHTHOUSE TOURS: Second-to-last weekend this summer to take a free tour of historic Alki Point Lighthouse with US Coast Guard Auxiliary volunteers, 1-4 pm. (3201 Alki SW)

MODE MUSIC STUDIOS GRAND OPENING: Join new WSB sponsor Mode Music Studios for the grand-opening party featuring music and more at Skylark next door as well as studio tours (with punch and cake!) at Mode’s new HQ, 3-6 pm. (3805 Delridge Way SW)

K-5 STEM BACK TO SCHOOL BASH: 4-7 pm at the north end of Lincoln Park, all K-5 STEM families welcome – details and directions on the PTA website. (8011 Fauntleroy Way SW)

SUNRISE HEIGHTS STREET DANCE: Starts at 5 pm – details in our calendar listing (30th SW)

TYRONE IN CONCERT/SCHOOL SUPPLIES DRIVE: 5-9 pm at West Seattle Christian Performance Hall in The Junction, concert by Tyrone “The Working Class Hero” and school-supplies drive (folders, binders, pens, pencils and backpacks for foster kids) presented by nearby Unified Outreach. Details in our calendar listing. (4400 42nd SW)

FINAL ‘WEST SEATTLE OUTDOOR MOVIES’ – BRING DIAPERS! The sixth and final West Seattle Outdoor Movies presentation of 2014 is “Frozen,” on the big screen in the courtyard by Hotwire Online Coffeehouse (WSB sponsor). Come early – while 6:30 pm is the official “gates open” time, there’s really no way to lock down the courtyard, so when it’s a hot movie, stakeouts might start sooner. Preshow entertainment will be courtesy of Seattle Balloon Arts – and there’s a free community barbecue too, courtesy of West Seattle Christian. Along with bringing your own chair/blanket, bring diapers! This week’s official community nonprofit beneficiary for concessions and raffle tickets is WestSide Baby. Every package of diapers you bring will get you three raffle tickets. Movie’s at dusk, around 8:30 pm. (4410 California SW)

TONIGHT’S LIVE MUSIC: Multiple venues – see the listings on our calendar.

‘YOU’RE A GOOD MAN, CHARLIE BROWN’ MATINEE: 7:30 pm is your second-to-last chance to applaud the young performers in the ArtsWest youth-conservatory production of “You’re a Good Man, Charlie Brown“; tickets online here. (4711 California SW)