Sunday will likely be a spectacular fall day for doing anything outside, sunny, dry and comfortable tempertures, rising from upper 40s and low 50s in the morning to upper 60s to mid 70s by afternoon. A storm system moving along the Gulf Coast will turn northeastward by Monday and Tuesday, and that will sweep in lots of Gulf moisture, with periods of showers and perhaps even a storm or two during that period. The projected track of the low-pressure system along or just west of the mountains is a favorable one for upslope-enhanced rainfall, so locations along the Blue Ridge may see a stripe of higher rainfall totals than many other areas in Southwest Virginia. Generally, about an inch of rain is expected, even a bit less. The low’s forecast position on Tuesday morning (at left) could be favorable for some strong shear aloft, which at least hints at a severe storm threat — however, as is typically the case, low instability after a showery night and morning may prevent a larger threat. The front with this storm system will not bring in a drastically cooler air mass — late week temperatures will be similar to this weekend’s — but beyond that, that are signals that large, deep cold air masses will move across Canada into the central and eastern U.S.