CHARLOTTE, N.C. -- It probably doesn’t surprise anyone that it has rained 14 of the last 15 days in Charlotte, and computer models are projecting more chances for rain all week.
For the second time this year area lakes have been close or over full pond with widespread flooding being reported.
So why so much rain and why for so long?
First, a high pressure system has set up over the western Atlantic Ocean and the clockwise circulation around the high continues to pump Atlantic moisture into the state. This high pressure system is called the Bermuda high.
There is also an upper level low pressure system sitting over the Midwest and central plains. The flow of air around the low is counter clockwise, pulling Gulf of Mexico moisture northward toward the Carolinas.
This pattern in itself is not unusual, but for how long and persistent it has been, the pattern is uncommon. As long as this blocking pattern doesn’t change, the daily chance for showers and storms will continue.
The flow of air around the Bermuda high will also steer tropical weather systems such as Tropical Storm Chantal in the Atlantic. The projected path will take the tropical storm toward the Caribbean and then possibly to the southeastern corner of the United States by next weekend. The track of Chantal is still uncertain but it may add more rain to our forecast late in the weekend or early next week.
On the other hand, temperatures have not been as hot this summer because of the clouds and rain. So far there have only been four days where the high temperature hit 90 degrees.
Last year we hit 100 degrees three times by this point in the season. It was 101 on this date last year. Also, there has not been one ozone action day in the Carolinas this year.