( CNN ) -- Michelle Timberlake did n't expect to venture into the weekend blizzard that blanketed much of the mid-Atlantic . But the interior designer who normally wears high heels to work found herself running through hip-high snow Saturday morning when about 40 cows escaped from the pasture on her and her husband 's Boyce , Virginia , farm in search of food and shelter . `` This was not what I imagined for myself , '' she said Sunday , laughing at the memory . Luckily , the cows were corralled -- thanks to a bale of hay -- and the snow stopped , but not before more than 30 inches had been dumped over two days in parts of the region . Timberlake said she and her neighbors were gearing up for the next weather system , expected to hit the area as early as Tuesday . The National Weather Service is forecasting more than 5 inches of snow and winds up to 25 mph in the Washington and Baltimore , Maryland , areas . `` Everybody 's just trying to clean up and get a little bit ahead of the game before the next round comes , '' said Timberlake , whose farm is located about two hours west of Washington . More than 300,000 people from Pennsylvania to Virginia were without electricity Sunday , utility companies said . In many cases , heavy snow brought down power lines . `` I 'm not sure how many people will have their power back on by Super Bowl time , but things are going really well today , '' said Joe Gilbert with a Dominion Power crew working Sunday afternoon to restore power to about 3,000 in one McLean , Virginia , neighborhood . `` It 's good weather and we 're making good progress so hopefully everybody 's power will be back on . '' Timberlake said homes around the corner from her farm are without power and have been told it wo n't be back on until Friday . `` Since the heavy , wet snow is still bringing trees down , we are still seeing new outages occur , '' Allegheny Power said in a statement Sunday . `` Damage assessment is ongoing , but overall estimated times for the restoration of service have not been determined . '' The utility company provides electricity to customers in Pennsylvania , Maryland , West Virginia and Virginia . Nearly 135,000 of its customers had no power , the majority of them , or 92,295 , reside in Pennsylvania , the company said . Outages were also reported in Delaware and New Jersey . Residents , businesses and airports were trying to dig out Sunday . Good Samaritans in McLean , Virginia , stopped to help drivers stuck in snow drifts . `` So much for going to the Kennedy Center today , '' said one woman behind the wheel of a Mercedes-Benz as about five men shoveled and pushed her car out of deep snow . `` We 're going home . '' CNN iReporter Sean Conrad described his town of Rockville , Maryland , Saturday as empty and photos showed streets recognizable only by traffic lights . The city got 25.5 inches . Conrad told CNN that many roads still were covered by snow Sunday , even though snow plows were working 24 hours a day to clear them . Only a few businesses opened Sunday , and those that did operated with skeleton crews , Conrad said . Federal offices in Washington will be closed Monday , though emergency employees still are expected to work , the U.S. Office of Personnel Management said Sunday . Air traffic in Washington picked up slowly Sunday after a day of cancellations . A record 32.4 inches of snow fell on Dulles International Airport over two days , breaking a January 7-8 , 1996 , record of 23.2 inches . The quick-falling flakes forced Dulles and the other two main Washington-Baltimore area airports to cancel all flights Saturday . Dulles reopened Sunday to limited service , according to Rob Yingling , spokesman for Metropolitan Washington Airports Authority . Airport personnel were still removing snow from the Baltimore-Washington International Airport on Sunday , and it remained uncertain when flights would resume , spokesman Jonathan Dean told CNN . Reagan National Airport was still closed early Sunday afternoon as crews continued to plow snow and chip away at 5 inches of ice that developed overnight , Washington Metropolitan Airports Authority spokeswoman Tara Hamilton said . The airport accommodates just under 700 flights a day , she said . Philadelphia International Airport in Pennsylvania racked up 28.5 inches of snow , the National Weather Service . The airport was closed Saturday , but it reopened Sunday and was expected to operate at 60 percent capacity , spokeswoman Victoria Lupica said . Amtrak canceled several trains Sunday after trees and power lines fell onto portions of its tracks , the transit company said . Dozens of Greyhound routes in the Mid-Atlantic states also were canceled , the bus company said on its Web site . And state officials have advised drivers to stay off the roads . CNN 's Sarah Aarthun , Justin Lear , Sarah Lee and Rachel Rodriguez contributed to this report .
NEW : Federal offices in Washington will be closed Monday . More than 300,000 from Pennsylvania to Virginia without electricity Sunday morning . Dulles Airport resumes some flights ; flights still canceled at Reagan National , BWI . 32.4 inches of snow at Dulles breaks old record .