Okay, it's not quite this cold yet.

Good morning! Hope you had a good weekend. Did you notice it’s cold outside? The Post did:

Across the region, tourists and residents scrambled to accommodate an abrupt shift from flip-flops to fleece as the jet stream dipped over the Mid-Atlantic and delivered a premature load of chilly air. Thermometers barely reached into the 50s Sunday, more than 20 degrees below the average high for the second day of October.

“It’s unusual,” said Washington Post meteorologist Jason Samenow. “This is more characteristic of temperatures you expect in late November.”

Building supervisors rushed to make sure boilers were ready for an early start to the heating season. Many homeowners who had been running air conditioning only days ago were surprised to wake up to find their furnaces running. Strosniders Hardware in Silver Spring reported a boomlet in sales of firewood and space heaters Sunday morning.

“We’ve sold more than a dozen” of the heaters, manager Jerry Bennett said. “People want a little heat right next to them.”

And so on.

Photo by Darrow Montgomery