I believe that some of the heat and humidity that you are experiencing on the Eastern Seaboard is due to an elongated trough of low pressure, feeding moisture from the Gulf Of Mexico.
Arlene is presently, 0837Z, in a small pinch of an area between the elongated trough and an encroaching ridge of higher pressure moving toward the west from the Atlantic Ocean.
Two scenarios come to mind. (disclaimer-I am not a meteorologist)
1-Arlene squeezes throught the 'pinch' area as forecast and contributes more moisture to your area.
2- Arlene absorbs, and cuts off the moisture being ejected toward the Eastern Seaboard.

That being said, the last frame of present satellite imagery ends at 08:15Z. 4:15EDT/ 3:15CDT.
http://www.ssd.noaa.gov/PS/TROP/trop-atl.html
Several of the channels on the SSD website are now showing a very easily seen low level circulation. Just S of the most western tip of Cuba. I believe this is the Cape San Antonio and Cape Corrientes region.
http://www.latinamericanstudies.org/cuba/cuba-map-1898.jpg

Recon has reported a 180 deg (South) wind at 45kts. 0742Z
and the last report was wind 170 deg ( SSE) at 44 kts. 0813Z

BULLETIN
TROPICAL STORM ARLENE ADVISORY NUMBER 8
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
5 AM EDT FRI JUN 10 2005

...AT 5 AM EDT...0900 UTC...A TROPICAL STORM WATCH IS IN EFFECT ALONG THE NORTHERN GULF COAST FROM MORGAN CITY LOUISIANA TO INDIAN PASS FLORIDA. A TROPICAL STORM WATCH MEANS THAT TROPICAL STORM
CONDITIONS ARE POSSIBLE IN THE WATCH AREA DURING THE NEXT 36 HR...
http://www.nhc.noaa.gov/text/refresh/MIATCPAT1+shtml/100840.shtml