As an example of a vertical temperature profile that is similar to the one over Star Valley under these conditions, is the radiosonde released a couple mornings ago at Kelowna in southern British Columbia.
Kelowna, British Columbia 1200GMT 2/5/2012 |
Following are the meteograms of temperatures for the last 5 days(Feb 3-7) of observations from several weather stations in and near Star Valley.
The Afton station has been most affected by the persistent inversion
Afton Temperatures Feb 3-7 2012 |
A similar scenario is observed by the station at Thayne Elementary School.
Thayne ES Temperatures Feb 3-7 2012 |
At the Star Valley Ranch station which is about 300 feet above the valley floor as well as adjacent to the west slopes of the Salt Range, temperatures typically are not as cold under strong inversion conditions.
Star Valley Ranch Temperatures Feb 3-7 2012 |
The Box Y station, which is located in the Greys River Canyon, is interesting as well. While strong nighttime inversions develop due to the sheltering affects of the Wyoming/Salt Ranges, the canyon is considerably narrower than Star Valley, which allows the daytime heating to more effectively remove the inversions.
Box-Y Temperatures Feb 3-7 2012 |
During the morning hours there have been areas of fog trapped under the inversion. An example of this is the photo taken Sunday morning near Grover where the temperature at the time was minus 8F.
Sunday morning February 5 2012 |
By the end of February the sun will be providing sufficient insolation that nighttime inversions will weaken considerably during the afternoon.
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