Weather from NBC Storm Team 4 — Updated 5:30 p.m., April 18, 2015

Sunday will be cooler, with temperatures only reaching the mid- to upper-60s, more seasonable for this time of year. Skies become cloudy throughout the day, however, most of the day will remain dry.

Rain will begin moving into the region from west to east as early as 5 p.m., with rain likely everywhere by 11 p.m. Rain could be heavy at times overnight into Monday morning, possibly impacting the early Monday morning commute. There could be some flash flooding.

Currently, it looks like there will be a break in precipitation around the midday hours on Monday. Another round of precipitation is expected during the late afternoon and evening hours as a cold front pushes through. The amount of sun we get during the midday hours on Monday will dictate how strong rain and storms are later in the day. So for Monday, we are monitoring the threat of flash flooding very early in the day due to heavy rain, bringing a quick 1 to 2” and the possibility of strong to severe storms later Monday as a cold front pushes through.

High pressure builds back into the region, bringing seasonable temperatures Tuesday and mid-60s for Wednesday and Thursday. Some showers are possible Thursday, with temperatures trending down into the low-60s by Friday and next Saturday.

Saturday night: Few clouds, chilly outside the city.

Lows: 57 Washington

46-51 Elsewhere

Winds: Becoming NE 5-10


Sunday: Clouds increase, becoming breezy & cooler.

Showers possible by the late afternoon/early evening.

Rain overnight, possibly heavy at times.

Highs: 61-67

Winds: E 5-15; ESE 10-25


Monday: Rain, mainly during the early morning and again late afternoon/evening.

Possibly heavy at times with the chance for some flash flooding early Monday.

Chance of late day storms. Partly to mostly cloudy and mild.

Highs: Low 70s


Tuesday: Partly sunny and a bit breezy.

Highs: Around 70


Wednesday: Partly sunny and a bit cool.

Highs: Low to mid-60s