Showers have been moving northwest on this Saturday night, which is not a common direction of movement for Southwest Virginia. But lots of things are backwards in the atmosphere right now. A hot, dry dome of high pressure is building from northeast to southwest — opposite of what usually happens. (Inset map shows North American Model projected position of high by Monday morning, expanding over us.) An upper-level low over Kentucky is being bounced to the southwest, possibly all the way to the Rio Grande or beyond — that almost never happens. As the high builds southwest, the clockwise rotation is causing a southeasterly fetch of wind, which is lifting moist air off the Atlantic — not the Gulf of Mexico as with most recent downpours — over the gradually increasing elevation of the Piedmont and the sharply rising elevation of the Blue Ridge, condensing it and squeezing it out into showers and perhaps a few thunderstorms. Between the showers, we’ll have low clouds and drizzle banked against the ridges, the “wedge” effect that helped keep the sun away and temperatures in the 70s in many locations on Saturday. Gradually over the next 24-48 hours, the high will build overhead, with calmer, drier air aloft, and the southeast wind flow slowly becoming weaker. The sun will burn through the wedge, possibly as early as Sunday afternoon, and we are likely in for a few days of typical mid-summer weather, if not a bit hotter than normal — maybe some low-mid 90s from Roanoke south and east Monday-Wednesday. Because there is so much moisture at the surface to evaporate, we can’t rule out scattered showers and storms with daytime heating any day, but they will be getting more widely scattered. By mid to late week, the high pressure system will start being eroded from the north, and we may yet lapse into another cooler, wetter than normal period by next weekend or the following week.