Low pressure, centered over eastern Virginia this morning, will work its way to the mid Atlantic coast through the day today. Clouds will increase north of this feature, with the Capital Region on the northern fringes of the cloud shield. Snowfall will develop with the system through the morning and afternoon hours today. Snowfall accumulations are forecast to remain generally light over the Capital Region and vicinity, while as areas further south and east are expected to see greater accumulations.
As if it wasn’t cold enough, this low pressure area, as it moves into the open waters of the Atlantic early Wednesday morning, will induce a southward push of brutally cold temperatures into the region. The cold will be further exacerbated by increasing winds across the region beginning tonight. Wind chill temperatures will likely be well below zero.
The jet stream, or upper level wind pattern, continues to exhibit a deep trough (or dip) over the northeastern United States, while as a large ridge remains in place over the western states. Bitter cold air looks to remain locked in place over the Capital Region for the coming work week, with only slight temperature moderations through the weekend. In addition, several weak disturbances look to graze the region through the coming week, helping to keep the frigidly cold air in place.
Temperatures are forecast to average below normal, while precipitation amounts average near to slightly below normal as well.
...Below is the official forecast for the Capital Region and vicinity...
**National Weather Service WIND CHILL ADVISORY In Effect From 6 PM EST Tuesday Through Noon EST Wednesday**
Today: More clouds than sunshine and bitter cold. A chance of light snow and/or snow showers during the afternoon. High 10-15. Northerly winds 5-10 MPH. Chance of snow is 50 percent. Snow accumulations of an inch or less.
Tonight: A chance of light snow and/or snow showers during the evening. Otherwise, variably cloudy, breezy and brutally cold. Low near zero. Northwest winds 10-15 MPH. Chance of snow is 30 percent. Wind chill temperatures of 15 to 25 below zero at times. Little if any additional snow accumulation.
Wednesday: Partly sunny, breezy, and bitter cold. High near 10. Northwest winds 10-15 MPH. Wind chill temperatures zero to 10 below zero.
Wednesday Night: Partly cloudy and bitter cold. Low zero to 5 below zero. Northwest winds 10 MPH or less. Wind chill temperatures of 10 to 20 below zero.
Thursday: Partly sunny to start with increasing clouds and a chance of snow showers during the afternoon. High 10-15. Northwest winds 10-15 MPH.
Friday: Mostly sunny, breezy, and bitter cold. High near 15 and low near 5.
Saturday: A 40 percent chance of light snow. Windy, and cold. High near 25 and low near 15.
Sunday: A 30 percent chance of snow showers. Windy, and cold. High near 20 and low near 5.
Monday: Partly sunny, breezy, and cold. A 30 percent chance of snow showers. High near 20 and low near 5.