Few details have been released yet, but Obama will be speaking at CMU tomorrow around noon. It's invite-only, and needless to say you'll probably want to avoid Oakland if at all possible during the lunchtime hours.

UPDATE: We're getting indications it will be an economic stimulus/small business event. If so, that will make it along the lines of his speech exactly two weeks ago in Youngstown. Here's what Mackenzie Carpenter wrote then:

Skipping Tuesday's closely watched primaries in Pennsylvania and in two other states, President Barack Obama instead flew to this economically depressed community in the Mahoning Valley for a tour of V&M Star, a French-owned steel tube manufacturer that the White House is showcasing as an example of the $787 billion economic stimulus package's success.

In a 25-minute speech to several hundred employees, many in hard hats, the president cited the plant's $650 million expansion, which is expected to create 400 construction jobs and 350 permanent jobs, a doubling of the company's workforce. Mr. Obama noted that more jobs were created nationally in the last month than at any time in the past four years.

Here's CMU's rundown of all the closings on campus tonight/tomorrow too.

UPDATE 2: Whatever Obama is up to at CMU, he has pressing business to attend to once the Pittsburgh gig is over. From the WashPost:

The White House is throwing another epic bash, this time honoring Paul McCartney, winner of this year's Library of Congress Gershwin Prize for Popular Song.

Macca is the third songwriter bestowed with the award, (Stevie Wonder and Paul Simon have been honored in previous years), and the Beatle will be feted in the East Room on June 2.

He won't be the only star in the room. An array of artists will perform McCartney's songs in tribute, including Wonder, Faith Hill, the Jonas Brothers, Dave Grohl, Jack White, Elvis Costello, Emmylou Harris, Herbie Hancock and Corinne Bailey Rae. Funnyman Jerry Seinfeld will also be on hand for a few remarks.

The program will be taped by WETA as part of the “In Performance at the White House” series and is scheduled to air on PBS stations nationwide Wednesday, July 28.

MORE UPDATES: On the speech and traffic restrictions.