Frost advisories and freeze warnings issued area-wide as frigid night looms for D.C. area.
Temperatures in the 30s could damage plants and tender vegetation.
Tonight marks the coldest night since the start of April, with the potential for frosty temperatures extending all the way east to the Chesapeake Bay.
Temperatures in D.C. are likely to drop into the mid- or upper 30s downtown, with lower 30s west. Even if downtown remains in the upper 30s, due in part to warmth trapped by asphalt, buildings and the nearby Potomac River, areas north and west of town could approach freezing.
The Northern Virginia towns of Culpeper, Warrenton and Leesburg could all get down into the 30-to-32 degree range, while Harrisonburg may fall into the upper 20s.
St. Mary’s and Calvert counties in Maryland should remain in the mid-to-upper 30s.
https://www.washingtonpost.com/weather/2021/04/22/frost-freeze-washington-dc/?
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