A slow-moving/stalled frontal boundary lingering across the Ohio Valley into the Northeast will bring multiple rounds of rain and thunderstorms. As multiple waves of low pressure travel along this boundary, we’ll see several rounds of rain spread across multiple days, pretty much until the end of the week. During this stretch, because of the cloud cover and rain, temperatures will range slightly below average in the upper-70s.

Rest of today – mostly cloudy with rain arriving later in the day. HRRR (high resolution rapid refresh) simulated radar suggests the onset time of the first round of rain sometime between 5-7PM. This first round of rain isn’t expected to last too long. Overnight, around 1AM, we could see more substantial rain. Temperatures during the day peaking in the upper-70s and overnight lows in the mid-60s.

Tuesday – high temperatures in the mid-70s with mostly cloudy skies again. Rain chances more likely in the morning. Overnight lows in the mid-60s.

Wednesday – chance for showers and thunderstorms continues, with high temperatures in the mid-70s and overnight lows in the mid-60s.

Thursday – yet more chances for rain and cloudy skies with high temperatures in the mid-70s, and overnight lows again in the mid-60s.