Thursday, May 12, 2016
While a beautiful spring day is on tap for Friday, yet another wave rotating around the storm that affected us earlier this week, currently located north of the Great Lakes, brings some cooler temperatures to the Front Range late on Friday. Some of this air looks to filter over the Continental Divide Friday night into early Saturday before westerly winds force the front to retreat eastward in the morning. Lingering moisture in the warm airmass will fuel the threat of some Saturday afternoon showers.
Meanwhile, a Pacific storm is forecast to cross the Pacific Northwest coast late Saturday and drop into the Great Basin by Sunday. Transient ridging ahead of the storm should bring a warm and breezy day for Sunday, again with the possibility of afternoon showers. There is model disagreement with the strength of the Sunday showers but I expect the wetter AVN is overdone compared to the drier NAM.
Complicated interactions are forecast to occur between the Great Basin storm, additional upstream Pacific energy and additional energy still rotating around the old Great Lakes storm, leading to a wet Monday as a lead wave is forecast to eject over our area early in the day.
The main storm quickly follows the lead shortwave and moves over our area on Tuesday, bringing the threat of moderate to heavy rainfall Monday night into Tuesday. There may be a brief break late Tuesday into early Wednesday before another storm crosses the Pacific Northwest on Tuesday and brings more weather to our area for later Wednesday and Thursday.