Updated on September 16th 2008.
Fairly strong high pressure is dominating our area at the current hour and will remain for the next couple of days through this week. On Wednesday and lee side trough will develop on the eastern plains while the western slope will experience increasing clouds and precip associated with a short wave trough moving through tracking towards the NE. Mountain areas could see some lingering clouds and precip with remaining moisture in the mid levels. As the weekend approaches, moderate upper level system will push east across the western US. On Saturday increasing clouds along western CO with precip developing in the afternoon. Eastern CO will experience upslope flow on the plains with clouds developing late Saturday. Sunday will continue to have cloudiness through the morning. On Sunday afternoon a lee side Low will develop and last into Monday morning generating conditions for increasing clouds throughout the day. A strong area of moisture convergence will be present along with precip developing Monday afternoon and evening. These conditions will maintain into Tuesday.
Associated with these surface conditions is the upper level support necessary for these conditions to lapse. An upper level trough system will reach the CA coast on Friday and dissipate as it rolls over the Sierra Nevada Range and down onto the Eastern Great Basin. A second wave in this trough will redevelop on Sunday and continue to dig across the Eastern Great Basin but will only provide a weak jet influence on the CO region as it crosses CO on Monday. This weak upper level support will influence showers and cooler temperatures across the Front Range but will not lead to anything of significance.
5 years ago