The Scientist's View

6.03.2007

Nice extratrpoical low conversion


This morning's satellite of the US shows a very nice and elaborated low pressure that looks very much like a nor'easter. However, unlike a nor'easter, this is the remnants of Barry that was a tropical storm around the Florida peninsula and is now going through the conversion to an extratropical storm. This conversion takes a system that feeds off the warmth of the ocean to drive its development (the tropical storm) and as it moves into cooler waters or over land, it will then use temperature and moisture gradients (the extratropical storm) to perpetuate, and even strengthen.

Barry is a little early and a little to the east of a normal June track, but this formation of weak storms and the streaking of the remnants up the East Coast is a June fixture. Look for a few more remnants to pass by before the proper hurricane season starts in late July.

Having grown up in North Carolina, these tropical storm remnants would pass over at least once a summer - more often 2-3 times. When the low pressure passes fairly close, these storms provide a warm, drenching day-long rain along with a little breeze. The air is really fresh during and shortly after these storms. The best part is the sounds the trees make in the rain and the breeze - lots of rustling and whistling. Shouldn't be much breeze today, but once the rain starts (any minute) - open the windows or sit on a covered porch and experience to one of summer's most under-rated treats.

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