The cold front associated with the lumbering upper level low near Chicago moves little over the next day. Out ahead of it a stream of moisture from the south keeps flowing, meaning more clouds, tropical humidity, and periodic showers and storms.

Through Tonight: Scattered (i.e., not everywhere) showers and storms are around and about. They’re most numerous through around 7 and 8 p.m. (60% chance), and a few may be severe with damaging winds and small hail. Another possible risk from these storms is isolated flash flooding given recent heavy rains and the saturated ground. A Flash Flood Watch has been extended into our northern suburbs (Frederick, Carroll and Baltimore counties) thru Wednesday morning. After 7 or 8 p.m., odds of experiencing storms drop to about 40-50%. It’s cloudy and mild overnight, with lows 65-70.

Wednesday: Take today and hit repeat. It’s cloudy and muggy and showers and thunderstorms are once again likely - perhaps even a bit more widespread than today during the afternoon and evening (60-70% chance, slightly less during the morning and early afternoon, 30-40% chance). Highs are again from the upper 70s to low 80s

See Matt Rogers’ forecast through early next week. And if you haven’t already, join us on Facebook and follow us on Twitter

Pollen update from Walter Reed: Trees, grasses, and weeds are LOW. Mold spores are HIGH.