Jul 12, 2013 8:12 AM by Stephen Bowers
Moisture that extends high into the atmosphere will play a role in increase rainfall today and tomorrow, but most of the showers and thunderstorms will be over the mountains. High pressure is making a run to the east. Areas of the Southeastern Plains will be closer to that high pressure and likely will stay dry and hot today. Air around high pressure flows in clockwise fashion, but high pressure also tends to push air out from its center. That outward push will enhance the upslope breeze this afternoon, and a slight twist in the mid-levels of the atmosphere will provide some additional rising motion to help generate showers and thunderstorms. The bulk of the rain will be over the mountains, but some of the thunderstorms will ease out to the I-25 corridor. Once again, if heavy rain occurs in those areas of concern, flash flooding could be a risk. Be weather aware today if you are in areas prone to flash flooding.
Thunderstorms will be more limited and will hold off until later for most areas along I-25. Before the cooling rain moves in, we will warm quickly. High temperatures will be in the upper 80's and lower 90's on the Palmer Divide, including Colorado Springs. Mid-to-upper 90's are the story near the Arkansas River along and west of I-25. East of the interstate, rain will be more spotty in nature, and the temperatures will be warmer. Highs will be near or just over 100 this afternoon.
Through the weekend, the pattern favors scattered showers and thunderstorms. Like today, the rain will be most widespread and most likely in the mountains. The thunderstorms will develop in higher elevations and move out to I-25 as they fade away in the afternoons. An upper level low pressure area currently over the Ohio River Valley will trek from east to west, which is not the normal flow for storm systems. Temperatures will begin cooling on Sunday in the wake of this disturbance. Monday will be even cooler with a decent chance for more widespread rain across Southern Colorado. Still, some areas will miss the rain, but it could be that this is the highest probability of rain in quite some time for our area.