WEATHER BLOG: Rain Not From the Rainy Season

Rain was a somewhat rare sight in September. Since dry air can heat up pretty quickly and we didn’t have many showers or clouds, September 2019 ended up very warm and very dry. (Spectrum News file image)

After a very dry pattern of three weeks to close the month of May, we have seen our share of rain so far this month. In fact, Tampa has had measurable rain for eight days straight.

We usually consider June as the beginning of our rainy season. But the first 10 days of the month, although very wet, had weather patterns that were a bit unusual for June.

The weather pattern across the country was more late in the winter or early spring. A sustained dive in the jet stream over the eastern United States has allowed active weather to emerge in the southeast, including here in Florida. With the June heat and typical humidity, this meant repeated rounds of showers and storms. But these have nothing to do with what would be our normal June or summer pattern.

Usually, this time of year there is an east or southeasterly wind flow due to continued high pressure somewhere in the north or northeast. This pattern favors morning sun and afternoon storms.

With heating the day, a typical June or summer day would start with sunny and warm mornings. If we then warm up, the instability will lead to cumulus cloud development and a sea breeze. The sea breeze front is moving inland a bit and that front will be the focus for our afternoon or evening storms.

Often there are daily subtleties in the wind flow or how far the sea breeze can get, but the general pattern remains the same.

With all this said, looking at our forecast at the end of this weekend and early next week. The high pressure ridge will be built over the western Atlantic Ocean and set us up with the east to southeast wind pattern. This, combined with the available humidity, will prepare us for a typical summer weather. None of this all day, or always storm stuff.