Week Heat Index Lake Norman Heat Index of the Past Week Heat Index graph of the past week. This graph is updated on the hour Today | 1 Week | Month | 3 Months | Year Weather Home | Air Temperature | Water Temperature | Humidity | Average Wind Speed | High Wind Speed | Wind Chill | Wind Direction | High Wind Direction | Wind Run | Rain | Rain Rate | Barometer | Dew Point | THW Index | Heat Index | Air Density | Cooling Degree Days | Heating Degree Days | EMC