As is often the case over the Intermountain West, we're seeing a nice surface frontal boundary develop during the day over eastern Nevada and southern Idaho. Although a front was largely indistinguishable this morning, note the clear wind shift and contrast in temperature that currently exists from the southern Snake River Plain to near Elko Nevada.
Frontal passage at Jerome, Idaho was quite apparent in the meteogram as temperatures were climbing in the pre-frontal environment, but dropped abruptly with frontal passage.
I suspect we'll see further frontal strengthening (in terms of the abruptness of the temperature contrast) over the next few hours.
Kudos to MesoWest for collecting and integrating surface observations from all over the western United States. They are indispensable for frontal analysis!