The remnants of Tropical Storm Bill are forecast to bring heavy rainfall and storms overnight Saturday, dampening at least the start of Father's Day around Baltimore.
Significant moisture is forecast to blow into the region's air ahead of the rain, helping to fuel possible storm activity starting late Saturday, according to the National Weather Service. Heavy rain is expected to move in overnight, with an inch or more of rainfall forecast between Saturday and Sunday afternoons.
A flash flood watch is in effect across the state Saturday night through Sunday morning, with chances for rainfall at rates of up to an inch or two per hour, according to the weather service. The government's Weather Prediction Center's models suggest an inch and a half to more than two inches of precipitation through the weekend.
Most of Maryland is also included in an area with a "marginal" risk of severe weather, according to the weather service's Storm Prediction Center.
Precipitation is forecast to taper off around midday Sunday from west to east as the system moves off the coast.
Any rainfall will add to a bloated precipitation tally for the month. At Baltimore-Washington International Thurgood Marshall Airport, more than 6 inches of rain have fallen in June, about 2.5 inches more than normal for the full month.
This month already ranks among the top 20 wettest months of June on record in Baltimore and is third-wettest in a decade, behind June 2013 and June 2006.
Temperatures are forecast to reach the lower 80s Saturday, and around 90 degrees Sunday. But with humidity increasing Saturday afternoon into Sunday, Father's Day is expected to feel sticky and uncomfortable, with the heat index reaching the mid-90s.
Slightly cooler temperatures, with highs in the mid- to upper-80s, and lower humidity are forecast next week.