|This is a map of the 24 hour precipitation accumulation produced by combining radar and rain gauge measurements. Source: NWS Advanced Hydrologic Prediction Service|
Now the Midwest is bracing for Isaac's rain. A flash flood watch is in effect for much of Arkansas, and will probably be extended through Missouri and Illinois tomorrow and Saturday. The forecast track of Isaac has varied a little over the last 24 hours, but the axis of heavy rain is still likely to be an area from Arkansas through most of Missouri, Illinois, Indiana, and Ohio. Generally 3 to 6 inches of rain can be expected, with some locations receiving more. Some of the squalls will be accompanied by strong gusty winds, and a few severe thunderstorms are not out of the question.
|Forecast track for Isaac issued at 4:00 p.m. CDT|
|Quantitative precipitation forecast for August 30-September 4|