Weather balloons from North Little Rock are being used to forecast the path of Hurricane Ivan while it`s still south of Cuba. Ivan is the first Category Five storm to enter the Gulf of Mexico in decades. John Robinson said the weather balloons from Arkansas will go thousands of feet into the atmosphere today to track the storm`s path. The balloons register areas of high pressure, which force hurricanes to turn. The forecasters then can determine where they think the storm will head. The large, dull beige balloons gather temperature, humidity and pressure data. The balloons can expand to larger than a railroad box car before bursting.