Not Your Typical Diurnal Curve

Pretty neat weather ongoing here in GFK. Today we had a daytime high of 20°F. Then some snow moved through ahead of a warm front - coating the ground with a fresh dusting to half inch. And what a nice warm front it is, with a 1am temperature now at 37°F! Here is a copy of the surface map with a crude overlay of frontal positions at 0716Z. Notice that in the 15 minutes that elapsed before I grabbed the surface map for analysis, the cold front passed through and the temperature dropped 5°F in 15 minutes:

I forgot to hit publish earlier, so I will expand on this topic a btit more. Plenty of cold air up in northern Manitoba where it's currently -35°F with a wind chill of -64°F at Gillam (ASOS: CYGX)! Should be a steady free fall in temperatures through the day -- we'll fall below zero during the afternoon. By 11:59pm, if we can fall to -13°F we will achieve a diurnal temperature range of 50°F! The latest GFS-LAMP MOS takes us pretty close, but falling just shy with a low of -11°F. Here is an hourly look at temperatures since midnight Tuesday:

Obviously the "curve" will be reversed for 1/16, and when graphing the two days together, it will be neat to see one big diurnal curve over a two-day span, as opposed to the "normal" pair of diurnal curves over the two days.