Patchy Fog This AM; Snow Possible on Saturday

by MCS Staff
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Temperatures are expected to reach the low 50s today, but before we get there we’ll have to deal with some patchy fog and cold temperatures this morning that could cause a few slick spots. Below you”ll see an update from the National Weather Service:

Patches of dense fog has developed east of the Blue Ridge Mountains early this morning. With temperatures near or below freezing, there may be a few slippery spots during this time. Reduce speed and leave extra travel time and following distance. Be alert for slippery spots, and avoid braking or turning suddenly.

A period of snow is also possible on Saturday following rainfall early in the day. Temps will drop into the 30s on Saturday afternoon and eventually the 20s. If they drop soon enough, we’ll likely see the rain change to snow before the system heads out. As you’ll be able to read in the NWS ‘forecaster discussion’ below, it’s still unclear as to how much precipitation will be left by the time the cold air comes in.

Something to keep an eye on in case you have Saturday plans.

National Weather Service Forecaster’s Discussion:

Temperatures in the 40s and 50s ahead of the front will fall rapidly into the 20s and 30s behind the front Saturday afternoon (teens and single digits along the ridge tops). The potent upper-level trough will pass through the area behind the cold front Saturday afternoon/early evening. Given the strong dynamics with the upper-level trough, this does cause an anafrontal setup, where a period of precipitation is expected to occur on the cold side of the boundary.

Therefore, rain is likely to end as a period of snow for most areas. There is still some uncertainty as to how much precipitation will be left by the time the cold air arrives, but it does appear increasingly likely that there will be accumulating snow in the farther northern and western suburbs of Washington/Baltimore toward the Allegheny Highlands. The farther west you go, the higher the confidence is and that`s because the cold air will arrive sooner, and those areas are in a more favorable location given the synoptics (left exit of upper-level jet and just northwest of the 850mb lows track).

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