Having produced record high temperatures across the Desert Southwest over the past few days, a ridge of high pressure is expanding eastward and will set records across much of the U.S. Within this dome, air is sinking, heating up and drying out.
Unlike our usual summer heat waves, during which high humidities moderate the temperature and keep nocturnal lows relatively warm, this dry, desert heat will cause unusually high afternoon temperatures while permitting overnight lows to fall into the 40s and 50s F.
Here in Missouri, we will experience afternoon highs in the 80s F for the next few days with overnight lows in the low 50s. Spring is just beginning and this taste of summer will fade quickly; on the other hand, this atmospheric dome may portend warmer springs as climate change progresses.
