Normally the daily minimum temperature occurs early in the morning, before solar radiation begins to raise temperatures. But when there is strong advection of colder or warmer air, it can overwhelm the usual diurnal pattern. For Chicago, IL on Thursday, the morning low should be about 30, but as a strong cold front brings in gusty northwest winds and colder temperatures, the low should be at midnight. Let's predict Tmin for Chicago and see how low it goes by midnight.
|Tmin, deg F (error)