It’s still technically summer, and around the city, there’s a busy slate of festivities over the next four days. SDOT is already out with its weekend traffic-alert roundup. Note that this ONLY includes events they believe might affect traffic. As such, the only West Seattle event mentioned is the WS Junction Car Show, 8 am-4 pm on Sunday, since it’s closing California SW in The Junction between SW Oregon and SW Edmunds (which means some bus re-routing, too). Read on for the entire citywide list:

The next four days, Thursday through Sunday, September 15 – 18, will be packed with sports activities, ethnic festivals, rallies, parades, and vendor events including the annual Boats Afloat Show. In addition, mini-parks will be popping up all around Seattle this Friday, between 9 a.m. and 3 p.m. PARK(ing) Day is an annual global event where community members and artists collaborate to transform parking spaces into temporary public places. The city of Seattle is hosting a park on Fifth Avenue between Columbia and Marion. Visitors can get information about the city’s Race and Social Justice Initiative, Latino Heritage Month celebrations and emergency preparedness.

Compounding the list of traffic generating activities, the Washington State Department of Transportation (WSDOT) will close SR 520 between Montlake Boulevard in Seattle and Interstate 405 in Bellevue starting at 11 p.m. Friday, and reopen all lanes by 5 a.m. Monday. The Bellevue Way Northeast overpass above SR 520 will also be closed during the work. The closures are expected to impact traffic on I-5, I-90 and I-405. Drivers heading to Seattle for sports and other events, in particular the Saint Demetrios Greek festival in the Montlake area adjacent to SR520, should plan alternate routes. To help ease congestion, WSDOT is shifting the express lane schedules on I-5 and I-90.

While it will be a fun-filled weekend, it could also be frustrating for motorists. The Seattle Department of Transportation encourages event-goers to reduce their stress by leaving the car at home and trying one of the many alternate modes of transportation available – Metro Transit, the West Seattle Water Taxi, the Sounder commuter train, Link light rail, car pool, bicycle or even walking, if feasible.

Thursday, September 15

Seattle Boats Afloat Show: 10 a.m. – 6 p.m.

Chandler’s Cove on South Lake Union

650 attending

Expect some congestion in the area.

Athletic Awards – Vendor Fair: 11 a.m. – 4 p.m.

Republican Street between Eighth Avenue N and Ninth Avenue N

320 attending

Event will close a portion of Republican Street between Eighth Avenue N and Ninth Avenue N from 8 a.m. to 5 p.m.

Clean Air and Good Jobs Rally: 11:30 a.m. – 12:15 p.m.

Outside of the Westin Hotel

600 participating

Streets closed 9 a.m. to 2 p.m.: East side of Fifth Avenue between Virginia and Stewart streets.

Expect congestion in the area.

Friday, September 15

Susan G. Komen Seattle 3- Day for the Cure: 7 a.m.
North parking lot at CenturyLink Field
2,500 participating
Event ends at Memorial Stadium at the Seattle Center on Sunday
SPD will assist walkers out of the parking lot and onto the course on Friday morning; participants will use sidewalks along the route.

Park-ing Day Celebrations: 9a.m. – 3 p.m.
Downtown and in communities throughout the city, mini parks will be set up in on-street parking spaces.
Traffic will not be blocked, but motorists may slow down when passing the sites.

Seattle Boats Afloat Show: 10 a.m. – 6 p.m.
Chandler’s Cove on South Lake Union
950 attending
Expect congestion in the area.

Saint Demetrios Greek Festival: 12 Noon – 9 p.m.
2100 Boyer Avenue E
1,000 expected
No streets closed; but expect heavier traffic in surrounding area.

Saint Benedict Wallingford Wurst Festival: 4 p.m. – 12 Midnight
Saint Benedict School, N 48th Street and Wallingford Avenue N
2,000 attending
Streets closed from 2 p.m. Friday – 11:45 p.m. on Saturday: N 49th Street between Wallingford and Densmore avenues.
Expect congestion in the area.

Seattle Storm vs. Phoenix – Semi Finals: 7 p.m.
Key Arena, Seattle Center
5,000 + attending
Expect congestion on streets surrounding the Seattle Center.

Mariners vs. Texas Rangers: 7:10 p.m.
Safeco Field
16,000 attending
Expect congestion on streets surrounding the stadium before and after the game.

Saturday, September 17

Susan G. Komen Seattle 3- Day for the Cure: 7 a.m.
North parking lot at CenturyLink Field
2,500 participating
Event ends at Memorial Stadium at the Seattle Center on Sunday
SPD will assist walkers out of the parking lot and onto the course on Friday morning; participants will use sidewalks along the route.

Seattle Boats Afloat Show: 10 a.m. – 6 p.m.
Chandler’s Cove on South Lake Union
2,500 attending
Expect heavier traffic in the area.

Saint Benedict Wallingford Wurst Festival: 10 a.m. – 12 Midnight
Saint Benedict School, N 48th Street and Wallingford Avenue N
2,800 attending
Streets closed from 2 p.m. Friday – 11:45 p.m. on Saturday: N 49th Street between Wallingford and Densmore avenues

Saint Demetrios Greek Festival: 10:30 a.m. – 9 p.m.
2100 Boyer Avenue E
1,000 expected
No streets closed; but expect heavier traffic in surrounding area.

Fiesta Patrias Parade: 11 a.m. – 12:45 p.m.
Assemble at 12th Avenue S and S Henderson Street
650 expected
Parade route: starts at 12th Avenue S and S Henderson Street; heads east on Henderson to 14th Avenue S; north on 14th to S Cloverdale Street; west on Cloverdale to Eighth Avenue S; north on Eighth to S Rose Street ending at the South Park Community Center ( 8319 Eighth Avenue S). Seattle Police will escort.

Alliance of Vietnamese Americans in Northwest America: 12:30 p.m.
Federal Building at Second Avenue and Marion Street – rally
500 participants
March routes leaves plaza of the Federal Building and heads south on Second Avenue to Columbia Street; moves west on Columbia to first Avenue; north on First Avenue to Spring Street east on Spring to Second Avenue; south on Second Avenue to Madison Street and the Federal Building; SPD will escort the march.

Mariners vs. Texas Rangers: 4:10 – 7:15 p.m.
Safeco Field
22,000 attending
Expect congestion before and particularly after the game on streets adjacent to the stadium.

Seattle Sounders vs. DC United: 6 –8 p.m.;
CenturyLink Field
36,000 attending
Expect heavy traffic before, but possibly more so after the match on streets surrounding the stadiums.

Sunday, September 18

Susan G. Komen Seattle 3- Day for the Cure: 7 a.m.
North parking lot at CenturyLink Field
2,500 participating
Event ends at Memorial Stadium at the Seattle Center on Sunday
SPD will assist walkers out of the parking lot and onto the course on Friday morning; participants will use sidewalks along the route.

Trek Women’s Triathlon: 7:15 a.m.
Genesee Park and surrounding areas
5,200 participants
Expect congestion and street closures near the park.

West Seattle Junction Car Show: 8 a.m. – 4 p.m.
West Seattle Junction
3,400 attending
Streets closed from 6 a.m. – 6 p.m. : California Avenue SW between SW Genesee Street and SW Edmunds Street, and on SW Alaska Street between 42nd Avenue SW and 44th Avenue SW.

Seattle Boats Afloat Show: 10 a.m. – 6 p.m.
Chandler’s Cove on South Lake Union
1,800 attending
Expect heavier traffic in the area.

Mount Baker Day in the Park Parade: 10 a.m.
Franklin High School – 31st Avenue S and S Mount Baker Boulevard
225 participants
Parade leaves High School heading east on S. Mount Baker Boulevard to Mount Baker Park at S McClellan Street and Lake Park Drive S. SPD and flaggers will escort.

Jimi Hendrix Memorial Concert and Art Show: 11 a.m. – 6 p.m.
Jimi Hendrix Park and Sam Smith Park
800 expected
Expect heavier traffic on streets adjacent to the parks.

Saint Demetrios Greek Festival: 12 Noon – 7 p.m.
2100 Boyer Avenue E
2,500 attending
No streets closed; but expect heavier traffic in surrounding area.

Mariners vs. Texas Rangers: 1:10 p.m.
Safeco Field
21,000 attending
Expect congestion before and after the game on streets adjacent to the stadium.

If you want to check major highways/bridges/roads in and leading to West Seattle, before you go, check out the cameras and alerts on the recently tweaked WSB Traffic page.