John Wheeler, WDAY, Published May 19 2013
Weather Talk: Weather change-ups more common this time of yearAs spring weather finally settles in, our weather has turned much more unsettled.
This time of year, more than any other, it is common for a day to start out with one sort of weather and then turn completely different during the day. It can be sunny and warm, then rain and turn cold. It can be perfectly calm through early afternoon and then become windy enough for blowing dirt in the afternoon.
The reason for the changeability is that smaller-scale weather systems become more significant as the sun gets warmer. Afternoon thermals can create strong, gusty winds out of nowhere. Convective thunderstorms may cause downpours and hail, but often over a very small area. All of these local but intense forms of small-scale weather are due to the sun’s rays reaching us with much more intensity this time of year.
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