Star Valley Summer Will Start Next Week

While today, the 21st of June is officially the start of summer(summer solstice),  Star Valley recently has been experiencing more Spring like temperatures.

Following is the graph from the Thayne ES weather station for the past 30 days.

Thayne ES max/min temperatures May 20-June 20 2013

Daytime temperatures have been relatively mild, but nights have been cool, many below freezing.

Following is the Weather Table for the Month of June at Thayne ES thus far

Noticeably is the the lack of any appreciable precipitation so far this June.

The current cool weather is the result of an upper trough of low pressure over the Northwest U.S.

500 MB Analysis midnight Thursday June 20 2013

This pattern will change over this next week leading to a large high pressure over the Western States.

500 MB forecast midnight Tuesday June 25 2013

500 MB forecast midnight Friday June 28 2013

Reflecting this forecast the 6-10 temperature forecast for the end of next week through the weekend calls for very warm
conditions in the mountain west

For the same time period the CPC is indicating that precipitation could be returning to the region.

This could reflect the beginning of the Southwestern Monsoon. So there is some hope of June ending on a wetter note, even with temperatures likely reaching into the upper 80s and low 90s by the end of next week.