Get Set For A Blast Of Chilly Air

Even before September 2011 ends tomorrow, the weather headline to summarize the month can already be written:  Warmer and Wetter Than Normal.  With a day to go, the month is already at the top of the list of wettest Septembers in Baltimore since official records started in 1871.  The 13.32″ of rainfall this month tops the 12.41″ that fell in September of 1934.  In fact, this soggy September has been the third wettest month of all-time, falling behind only August of 1955 which had 18.35″ of rain, and August of 1933 which had 13.83″.

With one more mild day in the forecast, the average temperature for the month is expected to be more than a degree above the normal 67.8F.

Deep low pressure slides into the mid Atlantic Saturday afternoon

Coldest air of the new Fall season invades the mid Atlantic Saturday afternoon

RPM model shows snow in the West Virginia mountains at 2pm Saturday

October, however, will arrive with a much different feel.  Deep low pressure in the upper atmosphere is expected to drop south and east from the Great Lakes toward the mid Atlantic region on Saturday.  Cold air will sweep in with the low, dropping temperatures to their lowest levels since last Spring.  The highest mountains of western Maryland and West Virginia may even see some wet snow mixing with the rain showers on Saturday.  Time to find those jackets and sweatshirts!

Tom Tasselmyer

 

 

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