|Meteorologist Jim Woodmencey
We were underneath a Southwesterly flow this week in western Wyoming out ahead of a Trof of Low-pressure that was over the western US. That kept a decent supply of moist and unstable air overhead that produced late day thunderstorms on Monday, none on Tuesday, and then as that Trof got closer, some rain showers & thunderstorms on Wednesday.
The crescendo of activity was Wednesday evening in Jackson Hole as the cold air aloft within that Trof crossed into western WY, acting just like a cold front passing through. Combine that with the best heating of the day, and good lifting in a Westerly flow over the Tetons, and away ya go!
Some Weather Highlights from Wednesday:
- Between 0.19 & 0.26 inches of rainfall in town.
- Some pea sized hail.
- Wind Gust at the Lower Saddle of 76 mph (at 11,610-ft. elevation).
There was also a decent amount of lightning along the Teton Range, and a few good strikes near town, as well. Below are some images of weather maps during the height of the activity on Wednesday.
|Radar with lightning overlay. Jackson is yellow dot. Yellow circle highlights the whole thunderstorm complex.
|Satellite and lightning strikes, yellow arrow upper level wind direction.
Image courtesy of MeteoStar
|Infra-red satellite image at 5;30 pm MDT