The weather lately has been comfortable and dry. Temperatures have been cooler than normal through much of May. All of this is about to change starting Monday. The humidity level increases (it will be humid next week) with a chance of rain/storms each day.
The chart below shows different computer model plots of forecast dew point temperatures. The green, straight horizontal, line marks the dew point temperature of 60 degrees. Once we start to see this value and above it is uncomfortable to some degree. The higher it is the more uncomfortable you will feel. This past week and this weekend to come, the dew point have been low…dry atmosphere. The change comes Monday. A south and southwest flow will bring more moisture north Monday and increase the humidity level. It remains humid all week until, potentially, next weekend.
The dew points of 60+ degrees will be the first time this year that threshold has been reached. The chart below shows the high and low dew point for each day so far this year. The lines in red are the days (8 days) where the dew-points has been 55 degrees or higher. It has not reached 60 degrees yet. So enjoy the comfortable humidity levels this weekend since it will be more humid all of next week.
Now that there is more moisture in the air, we have a better chance of getting thunderstorms through Iowa compared to recently. There is a front to our west most of the week. The map below shows the position of the front Wednesday morning.
Posted under Forecast Discussion
This post was written by Schnack on May 20, 2016