The heavy rain and thunderstorms that have been impacting the region overnight are pushing off the coast. Spotty showers will continue before things move off to our east. Total rainfall still looks to end up between 1 and 2 inches with locally higher amounts (BWI 1.92″ as of 4am). By this afternoon, we will get some sunshine and as a cool front approaches from the west, showers and storms are possible this afternoon north and west, slowly moving into the region from the west by late afternoon and early evening. Temperatures today will get very warm (warmer than previous forecasts by a few degrees), near 90 for most.
The cold front will pass tonight with a few showers or storms, but the real impact will be a lowering of the humidity for Monday. Temperatures Monday will be similar to today (near 90) with lots of sun and relatively low humidity (dew points in the mid 60s) as a cold front moves into the Ohio Valley.
Tuesday will be downright hot and humid as the front pushes closer. Temperatures north and west will likely be in the lower 90s as showers and thunderstorms erupt during the midday into the afternoon. However, ahead of those storms, much of eastern MD will see some sunshine, allowing temps to spike into the middle to even upper 90s with oppressive humidity (dew points in the low to mid 70s!). The cold front will push into the region Tuesday with afternoon and evening showers and thunderstorms.
Wednesday will still be warm behind the front (in the mid 80s) but it will be very comfortable with sunshine. Thursday will start out nice, but an approaching warm front may spark some showers and thunderstorms. It is highly dependent on the speed of the system, so timing will likely change. Regardless, all guidance looks wet Thursday night into Friday as an area of low pressure approaches from the west. Temperatures for the end of the week look seasonable or slightly below average in the lower 80s (average high for 6/26 is 86). Things look to clear out for the weekend as of now.