This morning we have some fog, and the lingering moisture will relate to variable clouds and haze to dim the sun. Yet another system can’t get it’s act together, so only a few showers along the coast and back in the mountains, with a whole lot of nothing in the middle for most of our region. That will change. The El Nino charged jet stream will buckle this weekend and surge much warmer air our way. This will help to mix some of the stagnant pollution out, and we could reach a record. Sunday and Monday will be when you really notice the warm air. So compared to the snowy Ravens game many were reminded of two years ago, this Sunday might have a record high while you wear short sleeves and perhaps shorts. But there is a sign of colder air in time for Christmas.
Baltimore Average today: High on Dec 9: 47°F
Looking ahead to the weekend
Sunday Dec 13: Average 46°F
Record Dec 13: 69°F in 1889
Here is a brief look at the jet stream temperature anomalies. Basically a break down of above and below average temps aloft, which translates to warm or cool down here at the ground. Notice the spread and surge of warm air this weekend, but the pattern will break down. A series of cool pockets in the western US will eventually take hold and then show signs of spreading our way in the week before Christmas.
Jet Stream Temperatures: Warming Up Then Signs Of Cooling