Flow from the south is transporting an abundance of moisture into the region. So out goes the sun, and in come clouds, humidity, and, with time, rain. While we managed to reach near 90 today, thicker cloud cover means only low 80s Tuesday, with downpours at times.

Through Tonight: A few showers may (30 percent chance) dampen locations well west and southwest of the District this evening. After midnight, rain chances increase everywhere from 60-80 percent west of I-95 to 50-70 percent chance east of I-95. Rainfall potential averages 0.5” west of I-95, with localized amounts of 1” or more, and 0.25” east of I-95, with localized amounts of 0.5” or more. Lows range from the mid-60s to around 70 (downtown).

Tuesday: You may need to allow some extra time for the a.m. commute as showers and thundershowers - some with heavy rain - may be moving through the region around that time. We’ll have periods of showers and storms all day, but it won’t rain continuously, with skies brightening occasionally. Highs should be in the low 80s.

Rainfall potential averages 0.5” but some areas could easily get 1-2+” due to slow movement of localized downpours. Such locations may have flooding issues. We’ll keep you posted.

See my forecast through the weekend. And if you haven’t already, join us on Facebook and follow us on Twitter. For related traffic news, check out Dr. Gridlock.

Pollen: All pollen types are LOW except grasses which are MODERATE-HIGH.