8:40 AM | Severe weather threat later today includes the possibility for isolated tornadoes

6-Day Forecast

Today

Becoming warmer with occasional showers and possible strong-to-severe thunderstorms, some of the rain will be heavy at times, flash flooding is a real threat, highs in the upper 70’s

Tonight

More rain, heavy at times, possibly a strong thunderstorm mixed in, flash flooding is a real threat, mild, lows near 70

Thursday

Mild with occasional showers and possible strong thunderstorms, some of the rain can be heavy at times, highs near 80

Friday

Mostly cloudy, still the chance for a few showers and thunderstorms, warm, near 80

Saturday

Partly sunny, still the chance for a shower and thunderstorm, warm, low 80’s

Sunday

Partly sunny, mild, again the chance for a shower or thunderstorm, near 80

Monday

Partly sunny, warm, highs in the low 80’s

Discussion

Our significant rain event that began on Monday changed in nature overnight from a steady, soaking, chilly rain to a pattern with occasional showers and thunderstorms. The overall result will be quite similar, however, in that heavy rain can fall at just about any time and flooding will continue to be a major concern. In fact, some of the thunderstorms that form later today can reach severe levels with damaging winds and heavy downpours; especially, from DC to points south and east. Isolated tornadoes are not out of the question with this pattern for later today and early tonight. While significant rain can fall in and around the District today and tomorrow, excessive amounts of 6 inches or more are likely in the mountainous regions from central Pennsylvania to north-central Maryland. The entire Mid-Atlantic region from the east coast to the Ohio Valley will be absolutely soaked by the time this latest prolonged significant rain event winds down later this week. Once the moisture from the remains of Tropical Storm Lee finally pulls out of the Mid-Atlantic region later this week, there will be so much humidity left behind that a lingering shower or thunderstorm will still be possible on Friday, Saturday and Sunday although much of the weekend will be rain-free.

Video

httpv://www.youtube.com/watch?v=9LdwO5cWsu0