The weekend will bring the kind of sunny and warm weather that’s perfect for an outdoor concert or baseball game.

That's good news because the three-day SweetWater 420 Fest is bringing artists including Bastille, The Roots, Kid Rock and Ludacris to Centennial Olympic Park.

A music festival that got its namesake from a local brewing company, SweetWater will feature more than 50 acts Friday through Sunday.

The event is expected to draw an estimated crowd of about 20,000 people, according to the Georgia Department of Transportation.

If that’s not enough action, the Braves will take on the New York Mets at Turner Field at 7:35 p.m. Friday, 7:10 p.m. Saturday and 1:35 p.m. Sunday. More than 46,000 people are expected to watch.

Here’s everything you need to know about traffic, events and weather before you head out:

Closures on I-20

One westbound lane will close between Martin Luther King Jr. Drive and H.E. Holmes from 9 p.m. Friday to 9 a.m. Saturday and from 9 p.m. Saturday to 9 a.m. Sunday.

One westbound lane will close between the I-285 interchange and Fulton Industrial Boulevard from 9 p.m. Friday to 5 p.m. Sunday.

Two eastbound lanes will close between Thornton Road and the I-285 interchange from 9 p.m. Friday to 5 p.m. Sunday.

Delays in Cobb and Cherokee counties

The Northwest Corridor express lanes project is under active construction.

As part of the project, one southbound lane on I-575 will close between Alabama Road and Chastain Road and between Barrett Parkway and I-75 from 8 p.m. Friday to 5 a.m. Saturday, from 8 p.m. Saturday to 5 a.m. Sunday and from 8 p.m. Sunday to 5 a.m. Monday.

One northbound lane on I-575 will close between Barrett Parkway and Chastain Road from 9 p.m. Friday to 5 a.m. Saturday. A traffic pace will also occur between Barrett Parkway and Chastain Road during the same time. The traffic pace will require motorists to drive 5 to 10 mph.

Two northbound lanes on I-75 will close at the I-285 interchange from 9 p.m. Friday to 5 a.m. Saturday.

One northbound lane on I-75 will close between Windy Hill and Delk roads from 9 p.m. Friday to 5 a.m. Saturday.

And two eastbound collector-distributor lanes on I-285 will close at the I-75 interchange from 9 p.m. Friday to 5 a.m. Saturday.

» For updated traffic information, listen to News 95.5 and AM 750 WSB and follow @ajcwsbtraffic on Twitter

Temperatures to reach the 80s

Rain that wet metro Atlanta roads Friday and kept temperatures in the low 70s will taper off overnight, making way for a dry and warm weekend.

Highs will gradually increase this weekend.

Temperatures will increase to the mid- to upper 70s Saturday and linger in the 80s Sunday through Tuesday.

» Check the full forecast and track changes

Attending the SweetWater 420 Fest?

If you’re taking MARTA to the festival, use the Peachtree Center station (red/gold line) or Dome/GWCC/Philips Arena/CNN Center station (blue/green line).

Parking is available at the Georgia World Congress Center Red Deck for $12 a day in advance or $20 a day on event day. A three-day parking pass is $34. Advance purchase is required.

Single-day general admission passes are available Friday and Sunday for $62. Saturday is sold out. More expensive 3-day and VIP passes are available.

The box office, located at Georgia Dome Gate E on Friday and Saturday and the corner of Centennial Olympic Park Drive and Marietta Street on Sunday, is open from 11 a.m. to 10 p.m. Friday, from 10:30 a.m. to 10 p.m. Saturday and from 10 a.m. to 9 p.m. Sunday.

Gates to the actual event open at 3 p.m. Friday, 11:30 a.m. Saturday and 11 a.m. Sunday. The music will play from 4:20 until 11 p.m. Friday, from noon until 11 p.m. Saturday and from noon until 10 p.m. Sunday.

Alcohol will be served after 12:30 p.m. Sunday due to state and local regulations.

» Full list of weekend events