Early December Ushers in Cold Air Across DMV

Cold Air Arrives

After a seasonable November, a pattern change brings colder conditions to the region. The month of November had 17 days with above average temperatures and 13 days with below average temperatures. Hopefully, everyone enjoyed the comfortable feel because the first few weeks of December will feel chilly!

According to NOAA, during the next 8-14 days a colder pattern takes hold of the eastern United States. This means temperatures will likely be below average. By next Thursday, daytime highs should top out in the low to mid-40s. Daytime highs in the low 40s is typical of late December.

In the mid-levels of the atmosphere a trough-like pattern sets up late next week. This allows cold air from Canada to dig farther south. In addition to the colder air, a more active period in terms of precipitation could also set up. This wouldn’t be a bad thing, because the D.C. area is experiencing abnormally dry conditions. As of Thursday Nov. 30, Reagan National was running at a deficit of 4.74 inches of rain since September 1st!

With the cold air in place and a potentially active pattern the StormWatch7 team will have to keep a close eye on timing precipitation. However, the latest models disagree on timing and type of precipitation into late next week. The European model, which we tend to weight heavier than others, has a front moving through ahead of the cold air on Wednesday and then quieting down into next weekend. As this is many days away, we can expect updates to the forecast. Be sure to download our StormWatch7 App and get ready to wear the heavy coats, gloves and hats by next week!

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