(Mark Gail – The Washington Post)

Last weekend’s lovely weather is a distant memory, replaced by the knowledge that this weekend should be damp, cloudy and cool (read the Capital Weather Gang’s forecast for more). But there’s no need to be blue when you should be focusing on green (this is some of the best introductory patter you will ever see, so I hope you’re enjoying it): St. Patrick’s Day is Sunday, which brings the parade to D.C. and other celebrations to spots across the region. Visit the Going Out Guide for a roundup of other events happening this weekend.

This weekend will also see Metro delays caused by work, road headaches stemming from a marathon and more. Here’s what you need to know:

Metro work on Red, Orange Lines

Metro work will impact the Red and Orange lines this weekend.

On the Red Line, buses will replace trains between NoMa-Gallaudet and Takoma; the Rhode Island Ave., Brookland and Fort Totten stations will be closed. Orange Line trains will single track between East Falls Church and West Falls Church and between Stadium-Armory and Cheverly.

For more, head here.

Rock ‘n’ Roll Marathon to close streets, snarl traffic

This marathon will roam through all four quadrants in D.C. on Saturday, and the resulting street closures will slow traffic and lead to bus detours. The marathon and related half-marathon will gather on Saturday at 7:30 a.m. on Constitution Avenue and 14th Street in Northwest before crossing Arlington Memorial Bridge, zipping up Rock Creek Parkway, cutting through Adams Morgan, Columbia Heights and other neighborhoods en route to North Capitol Street.

The full marathon will continue along East Capitol Street NE, Constitution Avenue NW and 9th Street, cutting down to Maine Avenue, through Southwest and toward the Navy Yard  before crossing the Frederick Douglass Bridge. After stretches on Anacostia Drive SE, Minnesota Avenue SE and East Capitol Street SE, it will conclude near RFK Stadium.

Metro will open on Saturday at 5 a.m. for this event.

In addition to street closures, the marathon will also lead to bus detours and delays.  All streets should reopen by 2 p.m., though that could change, according to police. For the full course map and more information, visit this post.

New York Avenue reduced to one lane 

New York Avenue will be limited to just one lane in both directions between Florida Avenue and Penn Street from 10 p.m. on Friday through 4 a.m. on Monday.

Lane closures on Anacostia Freeway/I-295

The District Department of Transportation will work to repair ramps along the Anacostia Freeway/I-295 from Friday, March 15, through Friday, April 5. This will create ramp closures in the coming weeks, so be prepared for that.

Beginning Friday and lasting until Friday, March 22, the ramp from northbound South Capitol Street to northbound Anacostia Freeway/I-295 will experience single lane closures. Rush hour restrictions will be imposed during this period, and during the evening rush hour traffic will be on the outbound side of South Capitol Street.

St. Patrick’s Day Parade street closures

The St. Patrick’s Day Parade in D.C. on Sunday will also close streets. The parade will gather on the National Mall and head west on Constitution Avenue NW from 7th Street NW to 17th Street NW. Expect 7th Street to be closed between Constitution Avenue NW and Independence Avenue SW from 9 a.m. to 3:30 p.m., according to D.C. police. Numbered streets between 7th and 17th streets NW that intersect with Constitution Avenue NW will also be closed during this period.

SoberRide returns

The free cab service is back for 12 hours on Sunday and early Monday morning, just in case anyone decides to celebrate St. Patrick’s Day with any drinking. The details are all outlined in this post, but the basics are simple: You call 1-800-200-TAXI (8294) and you can get a cab fare of up to $30 covered for free. (Anything over $30 is on you, so if the fare is $35, you just owe $5.) Yes, there will likely be long holds and waits to use it. But it’s a free cab ride on St. Patrick’s Day, so that is to be expected.

Wizards, Capitals at the Verizon Center

The Wizards are at home for the next two nights, hosting the New Orleans Hornets on Friday at 7 p.m. and the Phoenix Suns on Saturday at 7 p.m. On Sunday, the Capitals host the Buffalo Sabres at 7 p.m.

(Also, be forewarned: Ringling Bros. and Barnum & Bailey Circus arrives at the Verizon Center next Thursday for nine shows in four days. So expect added traffic around the Verizon Center next weekend.)

Silver Line meeting on Saturday

Metro is hosting an open house in Arlington on Saturday so that people can check out information and talk with Metro representatives about the Silver Line, which is expected to begin service later this year. The open house will take place in Sheraton Crystal City Hotel (1800 Jefferson Davis Hwy., Arlington, Va.; this is right near the Crystal City Metro station) from 11 a.m. to 4 p.m. Head here for more.

Tysons Corner street closures

The Dulles Metro project will shift some lanes and close some streets in Tysons this weekend for work associated with the Silver Line.

  • Leesburg Pike: The left and center eastbound thru lanes between Gosnell Road and Marshalls Drive will close from 10 p.m. on Friday to 2 a.m. early Saturday morning. The right and center thru lanes in the same stretch will be closed from 2 a.m. to 7 a.m. on Saturday.
  • Tysons Boulevard: The two left thru eastbound lanes between Galleria Drive and Route 123 will be closed from 11 p.m. Friday to 5 a.m. Saturday. And the three left turn lanes from southbound Galleria Drive onto eastbound Tysons Boulevard will also be closed during this time, as will the turns from Route 123 in both directions. Detours will be set up around this.

Rockville Pike closure

The right lane will be closed on both directions of Rockville Pike between Elmhirst Drive and Jones Bridge Road from 9 p.m. Sunday to 5 a.m. Monday. This is to allow for utility relocation.

Beltway lane closures in Md.

The three left lanes of the inner loop of the Capital Beltway between Pennsylvania Avenue and Suitland Parkway will be closed from 10:30 p.m. on Monday until 5 a.m. on Tuesday for bridge repairs on the Suitland Parkway Bridge.

New Fairfax Connector express service begins on Monday

The Fairfax Connector’s express bus service begins service on the Lorton and Springfield routes on Monday. The one-way fare is either $3.65 with a SmarTrip or $4 with cash, but free rides are being offered on these two routes from Monday, March 18, until April 12. Here’s the schedule for the Lorton and Springfield routes.