Tropical Storm Arlene formed Thursday afternoon in the Central Atlantic Ocean, around 800 mile west of the Azores. Satellite estimates indicated maximum sustained winds of 45 mph. The lifespan of Arlene has been short; the storm has already transitioned to an extra-tropical low pressure center (non-tropical) this morning.
— NHC Atlantic Ops (@NHC_Atlantic) April 21, 2017
The system first formed into a subtropical depression Wednesday morning. Longtime National Hurricane Center Senior Hurricane Specialist Lixion Avila noted in his forecast discussion Thursday afternoon, “I have to add one more surprise to my long hurricane forecasting career. Unexpectedly, the subtropical cyclone became a tropical depression this morning, and then it intensified to a tropical storm.”
— WeatherNation (@WeatherNation) April 20, 2017
Avila also stated, “Tropical storms in April are rare and Arlene is only the second one observed in this month during the satellite era. It should be noted, however, that this type of storm was practically impossible to detect prior to the weather satellite era.”
Before Arlene, there have only been four April tropical systems on record; the most recent Tropical Storm Ana in 2003. The other three were tropical depressions in 1992, 1981 and 1973.
Arlene has become embedded within the circulation of a larger extra-tropical low pressure system and has lost most of the thunderstorms around the center. It is also surrounded by cold air, diminishing tropical characteristics.
For WeatherNation: Meteorologist Mace Michaels
Flooding and severe thunderstorms are still possible tonight from the Mid Atlantic to the Gulf of Mexico -… https://t.co/L03tYNoznc2 hours ago by WeatherNation
Rain on Mars? New study shows how heavy rain may have reshaped the planet with craters and river-like channels:… https://t.co/OZhAkFenEo5 hours ago by WeatherNation
Charleston, SC is no stranger to flooding but that doesn't make it easier to deal with. This is from Tuesday as hea… https://t.co/P2YrQ2KXmF12 hours ago by WeatherNation
Multiple tornado warnings were issued across Georgia Tuesday, where this possible tornado occurred near Tybee Islan… https://t.co/R9zzUl5x4821 hours ago by WeatherNation
What a stunning sunrise over the Brooklyn skyline. Photo: Frank Little https://t.co/KnqiQnPNDZ22 hours ago by WeatherNation