Unabated cold wave continued to sweep Punjab and Haryana on Tuesday with Narnaul being the coldest place in both the states. Narnaul in Haryana recorded a low of 2.3 degrees Celsius, three degrees below normal level, an official of Meteorological Department said. Union territory Chandigarh, the joint capital of the two states, recorded a minimum of 4.8 degree Celsius, one notch below normal.