The next couple of days will be wet, foggy and mild in the Mid-Atlantic region and there will be a surge of temperatures on Friday in the DC-to-Philly-to-NYC corridor. Another storm system is then going to impact the Mid-Atlantic late in the weekend with one surface low pressure system (primary) heading into the Ohio Valley and a secondary likely to form near the Mid-Atlantic coastline. While there will be little cold air around initially, strong high pressure will build into southeastern Canada and act as a cold air source. This is likely to result in a changeover from rain-to-snow across much of the interior Mid-Atlantic on Sunday night and potentially all the way down to the I-95 corridor. Elsewhere, the overall pattern for the next several days will bring copious amounts of rainfall to the Lower Mississippi and Tennessee Valleys – areas that have been quite dry in recent weeks – and to the US west coast from California-to-Washington which will be inundated by multiple storms during the next couple of weeks.
Wet, dense fog, and mild in the Mid-Atlantic
The next couple of days will feature mild conditions in the Mid-Atlantic, occasional rain and drizzle, and widespread dense fog resulting from the mild air moving over the now diminishing snowpack. This type of fog is known as an advection fog and occurs when moist, mild air passes over a colder surface such as snow and is cooled from underneath down to its dew point (i.e., 100% relative humidity). On Friday, it’ll turn even warmer and the rain may wind down early in the day allowing for skies to brighten during the afternoon hours. Temperatures will surge to end the work week all along the DC-to-Philly-to-NYC corridor with afternoon highs not far from 70 degrees in DC, lower 60’s in Philly, and the upper 50’s in NYC.
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