REISTERSTOWN, Md. (CBSDC/AP) — A winter storm that dumped up to a foot and a half of snow on the Mid-Atlantic region is beginning to cause significant power outages.

Outages in the Washington area began to increase as a second blast of winter weather hit the region Thursday evening.

Pepco says nearly 7,500 customers were in the dark, along with more than 5,000 SMECO customers and 5,000 BGE and Dominion customers without power Thursday evening.

Forecasts had called for a heavy, wet snow and gusty winds, which raised concerns about the prospect of widespread power outages.

Power companies had warned customers to prepare for multiple days of without service on Wednesday. An ice storm left thousands of Maryland residents without power for up to four days last week.

Track: Current Outages

Maryland Emergency Management Agency spokeswoman Angela Bernstein said as people began to dig out Thursday morning, the snow was lighter than anticipated.

But as the day went on, more than a foot of snow covered some areas, weighing heavily on power lines.