The U.S. Post Office's motto may be "Neither snow nor rain nor heat nor gloom of night stays these couriers from the swift completion of their appointed rounds." But this week's snow presented a real challenge to those who carry the mail and other deliveries.

"The Postal Service is required by law for universal service, we provide mail delivery to every single home in the United States six days a week," said John Morgan, Kansas City, Missouri Postmaster. He says that every letter carrier left on Wednesday with a plan for delivering the mail through the snow.

"We do our best to make sure we take out all the mail we can," said Morgan. "We deliver everything we can each day. If we do have have some small amount that's not accessible we bring it back, report it and deliver it the next day."

Meanwhile, Eric Corp, the owner of the UPS Store on the Country Club Plaza, says while he received a steady flow of deliveries, the snow caused foot traffic to slow to a crawl.

"Our business fell off quite a bit yesterday evening, and then this morning it's been really slow because people have been staying in doing what they need to do," said Corp.

Both Morgan and Corp say all of the USPS and UPS ground deliveries are right on schedule. However, they do see problems then when planes can't fly because of inclement weather.

"Sometimes we'll get clogs at the hubs where planes have a hard time getting in and out," said Corp.