UPDATE 11 PM, 7/30: We’ll ditto Monday’s weather for Tuesday. Another humid day with scattered storms, forming because of daytime heating, terrain effects and a weak disturbance sliding in from the northwest. Where it rains, it may pour — and a few isolated severe storms may occur, with locally gusty winds. But it won’t storm or even rain on everyone. END UPDATE
Sunday was pretty close to a “normal” late July day in Southwest Virginia — Roanoke’s high/low was 88/66 compared to July 29 norms of 87/66, while Blacksburg was 84/61 compared to norms of 82/60. Dew points in the upper 50s and low 60s, while not exceptionally dry, felt comfortable after so many upper 60s/low 70s dew points of late.
As high pressure that brought the somewhat cooler and much drier air shifts eastward, its clockwise rotation will begin to bring winds from the east and southeast on this Monday. The result will be increasing moisture from the Atlantic, and also moisture lifting against the higher terrain, leading to an increase in showers and storms. The Hydrometeorological Prediction Center, on its Sunday evening map, shows a stripe of .25 to .50 rain from roughly the Roanoke/Blacksburg area northward through early Monday evening. As is typical with summertime sporadic activity, it likely won’t be a large smoothed-out area of general rain like shown on the map, but spotty showers and storms that dump an inch for a few, sprinkles or nothing for many, and something in between for the rest.
It appears the heat dome is likely to stay well west of this week, keeping the triple-digit stuff in the central U.S. Near to slightly above normal temperatures (highs generally 80s to low 90s) can be expected across Southwest Virginia with scattered showers and thunderstorms most days. A few hard-to-time disturbances from the northwest and a cold front from the same direction by mid to late week will enhance rain/storm chances at times.