 I'm Rob Stallworth, WTOP Traffic. Now to the P.J. Fitzpatrick Home Improvement Weather Desk for your home's windows. Trust P.J. Fitzpatrick. Here's 7 News First Alert Meteorologist Brian VandeGraaff. We're tracking decreasing humidity through the day as the cold front will eventually cross through. We'll look for that drier air to work its way in on the heels of a northerly breeze.