An area of low pressure and strong upper-level disturbance (vorticity max) may deliver some much needed rainfall across the Washington Region late next week. The image above (courtesy Tropical Tidbits) shows the latest GFS model with a 500-mb vorticity max (dark red colors moving from near St. Louis MO, toward the DC Region) possibly approaching our area Thursday into Friday of next week.
Monumental Sunset over the Tidal Basin in Washington, D.C.; photo credit Brook Ward
A few light showers or periods of drizzle are possible on Wednesday as a maritime flow moves in off of the cooler Atlantic ocean. Skies will be mainly overcast with highs only reaching the upper 50s north of DC with lower to mid 60s across our southern suburbs.
Image below, courtesy The National Park Service; view of the National Mall from the Netherlands Carillon in Arlington, Virginia
A cold front is approaching the DC Area bringing a period of soaking rainfall between 8AM and 1PM. Scattered thunder showers (40% coverage) may develop during the late afternoon and evening hours before our area clears out overnight.