Monday, April 17, 2023

Day 9 of Des Moines, IA (KDSM)

Clear skies with light winds will lead to decent radiational cooling tonight, though a bit of easterly wind could slow it down near sunrise. Mostly sunny skies tomorrow will lead to a rapid warmup, though there is a surprising amount of disagreement among models on just how warm it gets, likely due to differences in how fast the cold air mass moderates by the April sun and moves out. At this time of year, temperatures are usually near or slightly above the upper end of model guidance when it is sunny, though the HRRR/RAP might be a bit warm like it was for today. East-southeasterly winds will strengthen and lead to modest warm advection, along with some high clouds later in the day, but they will be thin enough to not impact the high substantially (maybe 1F).
 
Source: PivotalWeather
 

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