|Source: Shapiro (1983)|
Actual fronts can be more complex. Today's developing cold front provides an interesting example. In particular, a pronounced wind-shift developed over northern Utah in advance of the surface temperature gradient. For example, the 2200 UTC MesoWest analysis shows a very nice wind shift extending northeastward from Dugway Proving Grounds across the northern Tooele and Salt Lake Valleys.
Time series from DPG17 (along I-80 in the heart of the Salt Flats) and Hat Island over the Great Salt Lake clearly show two distinct wind shifts, the first with little or no temperature change, the 2nd accompanied by an abrupt temperature change denoting the leading edge of the cold air.
|Hat Island Meteogram|
An interesting case worthy of further investigation.