Some light snow showers and flurries will slowly come to an end this morning over the Capital Region. The cause for the precipitation was a fast moving, moisture starved, clipper low pressure area over southeastern Canada. This system will remain north of the region today, with its cold front passing through the region early Tuesday morning. Precipitation should be a sparse commodity with this feature.
The frontal system begins to slow, and eventually stalls south of the region Tuesday evening. Low pressure is forecast to form along the boundary on during this time, and slowly ride from the Ohio Valley toward the mid Atlantic. Meanwhile, another moisture starved clipper system approaches our region from the northwest, Wednesday morning. As this system passes, a strong high pressure area building into the upper Midwest from the Canadian prairies, will introduce a northerly flow of colder air into the Capital Region.
The southern storm (over the mid Atlantic states by Wednesday afternoon) is forecast to track to a position near Cape Cod by Wednesday evening, and then the Gulf of Maine by early Thursday morning, accelerating and strengthening as it does so. The difference in atmospheric pressure between the deepening low pressure area, and the strong high pressure area building in on Thursday, will help to keep winds elevated and gusty.
Temperatures rebound quickly behind the system, and after a cold start on Friday morning, with high pressure southeast of the region to close out the work week, southwest winds should aid in boosting temperatures to near to slightly below normal levels, perhaps trending back toward normal, over the course of the coming weekend.
...Below is the official forecast for the Capital Region and vicinity...
**National Weather Service WINTER STORM WATCH in Effect Wednesday into Thursday**
Today: Morning light snow showers or flurries possible with perhaps a coating of accumulation in spots. Otherwise, more clouds than sunshine for the balance of the day. High near 40. South winds 5 to 10 MPH.
Tonight: Variably cloudy. Low near 30. Southwest winds 5 to 10 MPH.
Tuesday: Mostly sunny. High in the mid 40’s. West to southwest winds 5 to 15 MPH.
Tuesday Night: Increasing clouds. Low in the upper 20’s. Light northwest winds.
Wednesday: Mostly cloudy with a chance of flurries in the morning. Periods of snow developing during the afternoon. Early high in the upper 30’s, with temperatures dropping to near 30 during the afternoon. Chance of snow is 60 percent.
Thursday: A 40 percent chance of snow in the morning. Otherwise, a mix of sun and clouds and windy by afternoon. High near 25 and low near 5.
Friday: Mostly sunny and windy. High near 35 and low near 20.
Saturday: A 30 percent chance of rain and snow showers. High near 40 and low near 25
Sunday: Mostly sunny. High near 45 and low near 25.