Forecast for snow! How much will actually stick?

Overnight: Cloudy, Wintry Mix to Snow Late

Lows: 30s | Wind: East 10-15 mph

Tomorrow Morning: Mainly Snow, Changing to a Wintry Mix

Temperatures: 30s | Wind: East 10-15 mph

Tomorrow Afternoon: Wintry Mix to Rain

Highs: 38°-43° | Wind: East 10-15 mph

Quick click for the latest counties under a Winter Storm Warning or Winter Weather Advisory. Follow ABC 7's Steve Rudin on Twitter @SteveRudinABC7 and StormWatch7 on Facebook.

A potent late winter storm will bring snow and a wintry mix to the ABC 7 viewing area overnight and into Monday. To determine how much will actually accumulate, the following key elements must be taken into account: timing, elevation and ground temperature. With that said, while some weather simulations (models) are predicting over two-inches, the reality could be much less, if anything at all. The best chances for measurable snow will be in the mountains and in the extreme northern and western suburbs of Washington, DC.

A Winter Storm Warning has been posted for the Potomac Highlands and Shenandoah Valley. The heaviest snow will be tonight and into Monday morning. Areas likely to see the most significant snow totals will be at elevations above 1,000 feet.

The northern and western suburbs of Washington, DC have been placed under a Winter Weather Advisory and will likely see a mixture of sleet and snow before changing over to all rain.{ } These counties include: Montgomery, Fairfax, Loudoun, Frederick, Prince William, Stafford, Spotsylvania and Howard. Plan for commuter disruptions and potential delays Monday morning, especially north and west of the Beltway. Temperatures will rebound Monday afternoon as the frontal system lifts northward allowing for the wintry mix to change to all rain.

Tuesday will be milder with highs in the 50s.

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