Depending on your location, you’ve seen either periods of showers or a fairly consistently showery day. Some of the most widespread activity so far, including heavier downpours, is now passing through the region. Despite the clouds and rain, high temperatures are ranging from the mid-60s to the west to around or above 70 in the I-95 corridor and east. Additional showers, some potentially intense, continue to move through the area into the night.
Through Tonight: The peak intensity of the rain event may come from evening into the overnight, though there is still considerable uncertainty with exactly where the heaviest totals might end up. As with during the day, it’s hard not to favor western and northern locations overall, though a slow-moving band of rain can pile up totals anywhere. Up to another .50”-1”+ is possible by morning under the most consistent bands of showers, with some spots maybe only seeing about .25”-.50” or so. Some dowpours are likely to cause ponding on roadways. Muggy lows range from near 60 to the mid-60s.
Tomorrow (Tuesday): Showers may wind down for a while by sunrise or during the morning, but additional rain is likely to develop during the day. Afternoon and evening seem favored for the heaviest or most consistent shower activity. Even with clouds, highs head for the mid-70s to near 80.
Current rain event: For the most part, places west have seen higher totals, now getting up into the .25”-.50” range in some spots (.39” at Dulles thru 4 p.m.), perhaps up toward 1” in elevation to the northwest. For D.C., and east, totals are running lower, with some locations not yet picking up a lot of rain (.05” at BWI thru 4 p.m.). The most recent GFS model still indicates a period of very heavy showers overnight, but the NAM thinks otherwise. The truth might be down the middle.