new_orleans_0915.jpegAs Gothamist Leslita mentioned, New Orleans is especially at risk from tropical storms because it is surrounded by water and is below sea level. As the Multi-angle Imaging SpectroRadiometer image of New Orleans (whitish area to the left) and the Mississippi Delta above graphically shows, there's not much difference between land and water along the Gulf Coast (story and high res image covering a larger area on NASA's Earth Observatory). Mobile is particularly vulnerable because it sits at the head of a small bay where the storm surge may get concentrated.

Our weather is much more benign. Cooler than normal for the rest of the afternoon with some showers possible tonight as an upper-level disturbance passes over us. Once Ivan makes up his mind we'll have a better idea of how the weekend will go. From this vantage point be prepared for rain.