Iem Features Tagged Heat Heat index values soared to well over 100 degrees this past weekend thanks to highs in the 90s and dew point readings in the upper 70s and lower 80s. the featured chart presents frequency of having a 100 heat index by hour and week of the year based on observations from the des moines sensor. The heat is on 14 jul 2010 06:22 am hot temperatures and tropical air are expected to conspire today to push heat indices well above 100 degrees. the featured chart displays the maximum heat index for the past 40 years at the des moines airport sensor.
Iem Features Tagged Heatindex Monticello heat burst 29 jun 2019 06:28 am 'tis the season for compact and powerful mesoscale convective systems (mcs) to frequent the state. sometimes these systems can force air rapidly to the ground surface, which then heats the air thanks to compression. the result is a burst of hot and dry air known as a 'heat burst'. June is certainly when summer heat and humidity starts to settle in and today's featured chart looks into a measure of heat being stress degree days (sdd)s. much like growing degree days, sdds accumulate daily heat units above some threshold, which is typically chosen as 86°f. Even larger values can be found to our north and west over the high plains where elevation, the rocky mountains and other things conspire to allow for more extreme heat and cold. the map is rather clear that if you don't like variability, you should be living in the southern tip of florida where the abundance of surrounding ocean moderates. The brutally warm and humid conditions of last week were thankfully mostly gone from the state for the past weekend. the combination of high temperatures and dew points created for extreme heat index values. the featured map displays computed maximum heat index values for the airport weather stations in the state over the past week.
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