Highs next weekend, at this time, are not expected to lift out of the 20s!
As the cold air catches up with the back edge of the rain, snow may briefly fall in the higher terrain of the central and northern Appalachian Mountains Tuesday night into Wednesday morning. As mentioned above, a cold front will be approaching from our west.
"Wednesday will see a deep Atlantic depression sweep in southerly gales and heavy rain, the heaviest bursts are forecast for western Scotland where 80mm to 100mm (4in) is possible". The cold is a necessary ingredient for snow, and it appears reasonably likely that the D.C. area will see its first flakes late this week or over the weekend.
Dale said there's no significant snowfall in the forecast but there is a chance for some snow showers Tuesday evening.
LONG-RANGE RAIN CHANCE HIGHLIGHTS: Wednesday to Friday will feature at least a 50-60% chance for more needed rain.
Monday: Mostly cloudy with isolated showers.
Tuesday night: A low of 29. Some places could see more than two feet of snow, the weather service said.
WEATHER OUTLOOK CHILLY Snow will start to fall over Scotland from Thursday
The sky will stay mostly cloudy tonight; a few showers are possible, mainly after midnight.
Highs Tuesday will once again be mild with temperatures in the 50s, but drop quickly once the front moves through.
The cold snap will hit the north-west of the country by the middle of the week, sweeping across the United Kingdom and reaching the south-east by Thursday, say the Met Office.
The image above shows you the expected temperature anomalies on Saturday, December 9, 2017.
The bottom line here is that the general pattern appears favorable for the chance of some scattered light snow or flurries between Friday and Sunday as these little impulses in the atmosphere zip by. Chance of precipitation is 30 percent.
Mostly clear; widespread frost late.
December is supposed to be a month where the weather gets active.
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