[UPDATE BELOW] It's not quite the weekend yet, and the MTA is making sure you know it: a midtown power outage has caused rippling delays along the B, D, F, M, A, C, E, F, J, Q and R lines. Service changes are affecting the B, D, E, F and M lines, specifically. Thank you for your undying patience.

Delays originated with a power outage at 7th Avenue and 53rd Street around 7:20 a.m., according to the MTA. One northbound D train stalled in the tunnel, moving into the station around 8:45. Con Ed is still working with the MTA to determine the cause of the outage, so don't expect normalcy any time soon.

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(Jen Chung / Gothamist)

Peter Goetz and Maureen Darcy were on the stalled D train, and exited at 53rd and 7th around 9:00 a.m. Both said their commute from Park Slope took about 90 minutes. Kristina Platel, 15, and Ambreen Khan, 37, of Queens said the D train was in the tunnel for over an hour.

"Our train reversed back to 7th Ave," Khan told Gothamist. "When we thought we made it back to the platform, people stood up and almost fell due to the train braking hard."

"There was a lot of jerking," she added. "As we stepped out, the platforms were dimly lit. It looked scary. The MTA told us to be careful exiting. Everyone seemed calm even though we were stuck for more than an hour."

Backlog at Brooklyn stations is no joke. Here, at Hoyt-Schermerhorn.

Here's to Twitter catharsis, made all the more accessible by system-wide WiFi. We'll update accordingly.

Check here for updates.

Update 11:45 a.m.:

Service has resumed on the B, D, and M lines.

But delays are forever...

Update 1:45 p.m.:

MTA spokesman Kevin Ortiz told Gothamist that the authority is confident that the evening commute will be smooth, thanks to MTA backup generators powering the impacted signals. Con Ed is still investigating the cause of the power outage, and trains are skipping the 7th Avenue-53rd Street station, which is still without electricity.

Con Ed issued a statement this afternoon. "We’re working jointly with the MTA to make repairs to underground equipment serving the subway system," the company said. "We will work with the MTA to complete the repairs as expeditiously as possible."

Update 2:30 p.m.:

Governor Cuomo issued a statement about the signal issues on Friday afternoon, and directed the New York State Department of Public Service and MTA to conduct an "immediate" investigation into the Con Ed "equipment failure."

"Simply put, this was completely unacceptable," he said, adding, "The New York City subway system is the lifeblood of the city and a critical means of transportation for millions of people."

Additional reporting by Jen Chung.