Heat Cranking Up Across Iowa

By Justin Gehrts, Meteorologist


By Richard Pratt

CEDAR RAPIDS, Iowa -- Just one day after approaching or even tying record lows, Iowa is dealing with summertime heat.

As of early afternoon, the western half of the state had temperatures of at least 90 degrees, with some locations even crossing over 100 degrees. According to Daryl Herzmann with the Iowa Environmental Mesonet, Sioux City’s 102 degree noon temperature was the warmest 12 p.m. temperature reading since at least the late 1940s for any location in Iowa for any day of the year. Sioux City’s 104 degrees at 1 p.m. was also the warmest such temperature on record.

While the more intense heat has been focused on western Iowa, our part of the state is also unseasonably warm. Normal highs are in the lower 70s, and early afternoon temperatures are well into the 80s to lower 90s. Nearly all of eastern Iowa should reach at least 90 degrees. For Cedar Rapids, the normal first time of hitting 90 is June 4. We’re well ahead of normal if we make it there today, which we easily should do.

Very warm air aloft moved into the state during the night and is situated over the state today. Winds are drawing that air down to the ground. Since the crops have not yet begun to grow and the trees just recently had their leaves come out, very little moisture is being put into the air from vegetation. As a result, we’re able to warm very easily.

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