Light wintry mix to rain possible, mainly east; Introducing new forecast zones

Current Surface Map
Current Surface Map
A WINTER WEATHER ADVISORY is in effect for Calvert, Charles, and St. Mary’s counties until noon.


An area of low pressure is moving northeastward off the Carolina coast. The storm will stay well to our south but the northern fringe may spread some light precipitation into the southern and eastern portions of the state.

At the onset, it will be cold enough for any precip that falls to fall in the form of sleet or freezing rain. Temperatures will climb above freezing later this morning, turning any remaining precip over to plain rain. Light showers may persist through the afternoon and into tonight.

Highs today will be around 40 under cloudy skies.

High pressure builds in tomorrow, leading to a pleasant day, with partly sunny skies and highs in the mid 50s.

Mostly sunny today; Light snow likely tonight into tomorrow morning

Current Surface Map
Current Surface Map
High pressure will control the weather today. Expect mostly sunny skies with highs in the low 30s.

An area of low pressure will move by to our northwest tonight, spreading light precipitation into our area later tonight. The bulk of this precip should be snow, but it may mix with or change to sleet by tomorrow morning. A general 1-2″ of snow is possible, with the highest amounts across the northern part of the state.

The snow/mix will end by mid-morning tomorrow. Skies should quickly clear and temperatures will rise into the mid to upper 40s.

Another system will slide by to our south on Wednesday. At this time, it looks to be far enough south to leave our area dry. It will be warmer, with highs will be in the low 50s under partly sunny skies.

Nor’Easter to impact state tonight and tomorrow

Current Surface Map
Current Surface Map
A Winter Storm Warning goes into effect tonight through tomorrow afternoon for all Maryland counties except Calvert, St. Mary’s, Somerset, Wicomico and Worcester.

A Winter Weather Advisory goes into effect tonight through tomorrow afternoon for Calvert, St. Mary’s, Somerset and Wicomico counties.


An area of low pressure developing along the Gulf coast will intensify as it moves up the eastern seaboard tonight and tomorrow spreading wintry precipitation into the area.

Expect snow to develop from south to north tonight between 8pm and midnight. The snow will become heavy at times overnight and into tomorrow morning. The low will pass very close to the Delmarva coast tomorrow morning, drawing warmer air into the eastern part of the state and changing the snow over to sleet and or rain. That mix will likely push westward, reaching the I-95 corridor, cutting down snow totals.

West of I-95 should remain mostly snow, with sleet mixing in at times. As is usual with coastal storms, north and west of I-95 will see the heaviest snowfall.

Snowfall Forecast (from southeast to northwest):

-Lower eastern shore: 2-4″ then rain
(Somerset, Wicomico, Worcester)

-Central and northern eastern shore: 4-6″ then sleet and rain
(Dorechester, Kent, Queen Annes, Talbot)

-Lower southern Maryland: 3-5″ then sleet and rain
(Calvert, St. Marys)

-From the bay to I-95: 5-10″, mixing with sleet and rain at times Thursday afternoon
(Anne Arundel, Prince Georges, Charles, Baltimore City)

-Western and northern I-95 counties: 6-12″ with some mixing
(Montgomery, Howard, Northern Baltimore, Harford, Cecil)

-West of I-95: 8-12+”
(Carroll, Frederick, Washington)

-Western Maryland: 4-8″