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Posted at 03:30 PM ET, 10/28/2011

PM Update: Bracing for an early season winter storm

Forecast snow accumulation through Sat evening. Forecast confidence: Low. Also, see storm timeline and FAQs
That morning sunshine was nice, wasn’t it? Well, no more of that for now. Clouds have thickened and begun to lower ahead of a storm system that promises to bring a wintry mix to the area beginning late tonight and then continuing tomorrow. Everything is still more or less on track with earlier ideas, though plenty of uncertainty remains. One bet is a sure one, today’s highs in the 50s, chilly as they were, should seem mild by this time tomorrow.

Through Tonight: Most of the evening should just be cloudy and chilly. But, as we head toward and past midnight the odds of light rain go up. Any overnight rain is probably not terribly heavy, and it’s likely all rain, though places may see some snow or sleet mixed in as well. Temperatures fall to the mid-30s or near 40 (coldest north and west).

Tomorrow (Saturday): Precipitation intensity picks up during the morning as the low pressure system gathers offshore. As our timeline indicates, rain may begin to change to snow as early as around sunrise tomorrow in the north and west elevated areas, before the rain/snow mix — and perhaps all snow — transitions further south and east during the day. Potential accumulations ranging from around 2-6” far north and west to a coating around D.C. and nothing (maybe some mix) south and east are still our best guess. Temperatures probably peak early near 40 and drop through the 30s or remain steady during the day, depending on location and precipitation type.

Sunday: After what should be the first freeze of the season for quite a number of folks — particularly north and west of D.C. — on Saturday night (plus the risk of icy spots on roads), Sunday should be another pretty cold one. Highs may struggle to get out of the 40s, even with plentiful sunshine. Any snow around should not have too much trouble melting though!

See Camden Walker’s forecast through the beginning of next week. And if you haven’t already, join us on Facebook and follow us on Twitter .

By  |  03:30 PM ET, 10/28/2011

Categories:  Forecasts

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