Snow and ice threatens the DC area Sunday night into Tuesday morning

Futurecast brings the chance for a wintry mix Sunday night into Monday morning

The colder air has filtered into the region behind yesterdays cold front, leaving the DC area with highs in the 30s today and low 40s tomorrow. All eyes are one the west coast today, where snow has blanketed the Pacific Northwest overnight into this morning. Around 3-6 inches has been reported in Seattle with 7.2 inches reported at SeaTac early this morning.

Energy from that system will spread eastward tonight into tomorrow, increasing clouds over the DC area during the day Sunday. Precipitation looks to reach the DC area by Sunday evening and Sunday night, starting as a period of wintry mix.

Questions still remain as to the extent of the cold air available, as temperatures appear very marginal at the surface and aloft. At this point in time, we think the best chance for a wintry mix will lie over the western and northwestern parts of the area from western Loudoun and northern Montgomery and points north and west starting Sunday night.

Light accumulations or a light glaze of snow to freezing rain will be possible overnight into Monday morning. High pressure will begin to move over Eastern Canada Monday as an area of low pressure moves out of the Plains. Precipitation and moisture will continue to override the cool, dry air being fed from the high on the eastern side of the mountains. Our area will be very close to freezing, and spots to the north and west may be at or below freezing for much of the day. This may lead to a prolonged period of freezing rain for those areas, with a tenth of an inch or more possible through Tuesday morning.

Guidance depicts milder air overspreading the entire area Tuesday as southerly winds increase and heavier precipitation enters the region. A changeover to all rain is expected during the day, even to the sheltered valleys north and west of town.

These types of systems can be very fickle so we will be closely monitoring for any updates. Be ready for some delays Monday and stay tuned to ABC7 and WJLA 24/7 for the latest updates.

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