In the 5 p.m. ET advisory, the Hurricane Center said Isaac remains a tropical storm with maximum sustained winds of 70 mph. Dry air, the center explains, keeps feeding into the storm keeping it from intensifying. The storm is predicted to make landfall near New Orleans as a category 2 hurricane with 100 mph winds.
With Tropical Storm Isaac bearing down on New Orleans, one of three key Army Corps of Engineers pumping stations that help drain the city during a storm is only at partial capacity — far less than what is needed to keep the Orleans Avenue Canal from filling.