A Rainy Memorial Day Weekend...

May 28, 2021 // Article by: Jen D’Iorio

After a dry start to Friday, the remainder of the afternoon and into the evening features scattered showers, first farthest south in the Baltimore and DC area then slowly trickling up north to New England. While this is an unfortunately wet kick off to any Memorial Day Weekend plans, this rain brings much needed moisture to the Northeast and Mid-Atlantic, where conditions have been rather dry with rainfall well below average for the last few weeks. Showers turn more widespread Friday evening and quickly build into periods of moderate to even heavy rain for the overnight hours (with a few rumbles of thunder not ruled out farthest south). Temperatures Friday night will range from the mid-40s farthest north to mid-50s in the south as conditions also turn breezy, with gusts of 20-30 mph.

A wet start to Saturday is in store as periods of rain continue early before tapering to scattered showers by midday / early afternoon. While trending somewhat drier for the remainder of the day, a gloomy, cool, and breezy rest of Saturday is expected, with additional scattered showers remaining possible through sunset (especially in the Mid-Atlantic). Temperatures are expected to only reach the 50s across much of the area, though MD/northern VA may climb slightly higher into the low-to-mid 60s. Take a look at the simulated radar reflectivity from the Hi-Res NAM for Noon Saturday.  This shows periods of rain tapering off in New England and scattered showers lingering across the Mid-Atlantic:

Courtesy Tropical Tidbits

Scattered showers return to the I-95 corridor Saturday night before building into periods of steadier rain again from south to north. The steady rain is expected to taper back in the predawn Sunday through much of the Mid-Atlantic, but damp conditions will persist through much of the day as lingering moisture showers hang around the area (though some dry breaks look to be worked in at times as well, especially early). Meanwhile in New England, another largely wet day is expected, as periods of showers and some steadier rain persists through most of the day. Here's the simulated radar reflectivity for 9AM Sunday, unfortunately still wet for much of the area:

Courtesy Tropical Tidbits

Memorial Day itself looks better for outdoor plans and celebrations across much of the region as the low pressure system that brought widespread rain exits off the coast of New England, allowing high pressure to build back into the area. While partly to mostly sunny conditions are expected through the day in the Mid-Atlantic, the morning in New England could still feature a few showers (perhaps a period of rain along the coast) before trending drier and partly sunny for the second half of the day. Conditions also warm up nicely for the holiday, with temperatures in the mid to upper 60s across New England and the northern Mid-Atlantic and in the low to mid 70s farther south.

Precipitation for 2 PM Monday - Canadian (RGEM) Model - Courtesy Tropical Tidbits

High pressure then keeps us mainly dry under a mix of sun and clouds for Tuesday. Temperatures continue to turn more seasonable, climbing through the 70s across the region. 

Check back on Tuesday for an update on next week's weather. Have a great Memorial Day Weekend everyone! Stay safe and dry!