The Mid-Atlantic region is seeing a significant shift in weather patterns as a wet start to the week provides much-needed relief to local rainfall deficits. Following a substantial downpour on Sunday, which marked the wettest day of the year so far for Baltimore, the focus is shifting toward an unsettled start to the Memorial Day holiday.
At BWI, Sunday’s rainfall measured 1.21 inches, helping to reduce the year-to-date deficit from -5.01 inches to -3.93 inches. While this represents a notable single-day improvement, a cumulative shortfall of -20.84 inches remains when accounting for the total period since 2024. Despite the rain, temperatures are expected to trend closer to seasonal averages as the week progresses.
Regional Weather Outlook
Meteorological conditions vary significantly across the region today. Morning rain is expected to impact Central and Southern Maryland, while areas to the north in Southern Pennsylvania will likely see persistent clouds and spotty showers, with the potential for thunderstorms later in the day. Travelers in Southern Maryland and coastal areas should be prepared for heavier downpours and thunderstorms from mid-afternoon through this evening, which may impact holiday transit plans.
The wet pattern is expected to persist through Wednesday. However, a transition is on the horizon; by Thursday, high pressure moving south from Canada is expected to clear the skies. This shift could lead to a period of lower humidity and sunshine, potentially offering some of the most pleasant weather conditions of the year heading into the weekend.
Did You Know? The record high temperature for May 25 in Baltimore was 94°F, set in 1991, while the record low was 38°F, recorded in 1956.
Expert Insight: While the recent rainfall provides a helpful reduction in the long-term drought deficit, the lingering wet pattern through mid-week suggests that caution remains necessary for outdoor holiday activities. The expected arrival of high pressure late in the week marks a significant transition, likely signaling a return to more stable, comfortable conditions for the weekend.
Frequently Asked Questions
What is the current rainfall deficit at BWI?
The year-to-date deficit is currently -3.93 inches, with a total cumulative shortfall of -20.84 inches since 2024.
What weather conditions are expected for the remainder of the week?
Rain and thunderstorms are likely through Wednesday. A new pattern is expected to emerge Thursday, leading to sunshine and lower humidity through the weekend.
How did Sunday’s rainfall affect the region?
Sunday was the wettest day of the year so far in Baltimore, with 1.21 inches of rain recorded at BWI, which improved the year-to-date deficit by 1.08 inches.
How will you be spending the warmer, potentially sunnier weather expected for the upcoming weekend?