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As our next weak system approaches from southern California, we'll start to see a shift in the upper-level winds to southwesterly. Moisture will gradually increase today and tomorrow. Dew points are already in the mid 40's this morning at the surface.    Similar to yesterday, daytime heating will once again create enough instability to fire off afternoon thunderstorms across the …

The upper-level pattern is turning less troughy and more ridge today, with weak westerly downslope in place across Colorado. The storm responsible for numerous days of severe weather has pushed into eastern Nebraska. Now, our airmass is drier and more stable that it has been in recent days. This will lead to more sunshine which will help to warm our temperatures …

The below figure shows the 500 mb mid-level pattern for this afternoon. The upper-trough has shifted eastward from its more westward location yesterday. It is situated over far southeastern Colorado. With that, the severe weather threat for thunderstorms shifts east into the Midwest, such as Kansas, Nebraska, Oklahoma, and Missouri. North to northwest flow ensues in the upper-levels behind the system …

The next 24 hours across northeast Colorado will be quite busy! The large-scale set-up has a 500 mb trough passing across the state today. At the same time, a surface low will develop in southeast Colorado. The combination of moist low-level air, upslope, and large-scale lift from the trough will produce scattered showers and thunderstorms this afternoon and into the evening …

We're going to keep this DayCAST very brief. We were out late last evening tornado chasing east of Denver, and this morning's alarm came way too early! We followed a supercell from it's spawn just southwest of Denver all the way to Yuma before we ran out of daylight. The storm dropped tornadoes on at least two (likely more) occasions …

An upper-level trough continues its slow trek toward Colorado today. Its disorganized center can be seen below stretching from California into Montana. After plenty of sunshine early today, we'll once again be on-guard for scattered thunderstorms this afternoon. We're expecting them to be slightly more numerous than yesterday, and pack a bigger punch (BTW, we recorded a light rain shower at BoulderCAST …

Here's a photo we took yesterday. Beautiful day for a hike in the Foothills, as summer was in the air! Another great day on tap for your Sunday! The upper-trough is taking it's time moving eastward, so we'll squeeze out one more fully dry afternoon across the Front Range. Highs will be cooler today, but still in the mid 70's.  …