MUCH COOLER AND DRIER AIR MOVES INTO HAMPTON ROADS… THE HUMIDITY RETURNS THIS WEEKEND ALONG WITH A CHANCE OF SHOWERS AND STORMS… THERE ARE A COUPLE OF AREAS OF CONCERN IN THE TROPICS

A strong cold front that moved through Hampton Roads overnight has brought a refreshing change in air masses. Today (Wednesday) will be much cooler and less humid. There will be cloudiness at times but no significant rainfall is expected. Speaking of rainfall, my Virginia Beach location did not get any significant rainfall yesterday. I think that most of Hampton Roads was spared the severe weather. I was watching the radar yesterday and it seemed that most of the stronger thunderstorms developed just to our south. I heard the thunder but that was about it. I’ve seen this happen several times in the past when a strong cold front fails to trigger the predicted strong to severe thunderstorms. I haven’t heard why they didn’t materialize but I am guessing down-sloping might have played a role. This is when the air descends down the mountains to our west which inhibits thunderstorm development. I did tell my wife earlier in the day yesterday that I thought we would not see the predicted storms. Sometimes, the upper-level dynamics needed to trigger the storms passes to our north so even though we have the heat and humidity needed for the storms, we are missing a major ingredient in storm formation. This is sometimes referred to as “forcing”.. Today, northerly winds will bring a refreshing change but it is still August so you know that this won’t last long. Warmer and more humid air will move in this weekend along with an increased chance of showers/storms. It is also possible that a tropical disturbance which is now in the Western Caribbean Sea might enhance the rainfall this weekend, but right now that is not a certainty. Another area of concern is in the Eastern Atlantic. That system is a long way off so there is time to watch it.

Leave a Comment