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6:00 AM | ***Wednesday coastal storm's greatest impact from Philly-to-Boston, but DC metro region not in the clear***

Blog

Weather forecasting and analysis, space and historic events, climate information

6:00 AM | ***Wednesday coastal storm's greatest impact from Philly-to-Boston, but DC metro region not in the clear***

Paul Dorian

6-Day DC Forecast

Today

Increasing clouds, cold, chance of rain and/or sleet in the afternoon, highs in the low-to-mid 40’s

Tonight

Rain in the evening likely mixing with snow after midnight, perhaps even changing to all snow in some areas, cold, lows in the lower 30’s

Wednesday

Periods of mixed rain and snow, breezy, cold, snow accumulations of a coating to an inch or two possible with the higher amounts in that range well to the northeast of the District and the lower amounts on the southwestern side, near 40 degrees for afternoon highs

Wednesday Night

Rain and snow showers ending, windy, cold, late night lows near 30 degrees

Thursday

Partly sunny, cold, breezy, lower 40’s

Friday

Partly sunny, cold, lower 40’s

Saturday

Mainly sunny, cold, low-to-mid 40’s

Sunday

Increasing clouds, cold, chance for rain or snow late in the day or at night, mid 40’s

Discussion

Low pressure will develop along the Carolina coastline tonight and then intensify rapidly as it rides up along the Mid-Atlantic coastline on Wednesday. Precipitation will break out later today in the form of rain, but as colder air gets wrapped into the system and “dynamical cooling” develops, the rain will mix with snow and likely continue as a mixture on Wednesday. There is the chance, however, for all snow in some spots for part of the time during this event. The intensification of this coastal storm will take place primarily to our north and east on Wednesday and this combined with the mixed nature expected of the precipitation around here will substantially limit snowfall potential compared to areas north of the PA/MD border. The snowfall estimate for the DC metro region is for a coating to an inch or two with the higher amounts well to the northeast of DC and lower amounts on the southwestern side, but any small change in the timing of the intensification and the storm track could have an impact on this range.

Meteorologist Paul Dorian
Vencore, Inc.
vencoreweather.com