Much of May has seen very comfortable temperatures and even with all of the rainfall, humidity levels have not been all that extreme with only the 21st reaching a 70°F dew point for Des Moines. Such high dew points in May almost always require transport of warmer and more humid air masses from our south and sourced from the Gulf of Mexico. Later in the summer season, aggressive crop transpiration and warmer temperatures can help push such dew points without much help from our south. Back to May, the featured wind rose plots the wind speed and direction reports for Des Moines when the coincident dew point is at least 70°F. The southerlies certainly dominate and any of the other directions are likely transient during low speed times and during frontal/storm passages.

Voting:
Good = 15
Bad = 0

Tags:   may