For the last seven days, a persistent mild cold wave has gripped Tetulia upazila in Panchagarh, with this northern district consistently registering the country’s coldest readings.
According to data from the Bangladesh Meteorological Department (BMD), the area recorded a minimum temperature of 9.7 degrees Celsius at 9am on Wednesday, accompanied by an air humidity level of 71 percent.
This follows a reading of 9.5 degrees Celsius taken at 9am on Tuesday. That day, humidity was measured at 74 percent, while wind speeds varied between nine and 10 kilometres per hour. The day’s highest temperature reached 27.4 degrees Celsius.
On 15 December, the mercury dipped to 9 degrees Celsius at 9am. Air humidity stood at 89 percent, with wind speeds again between nine and 10 kilometres per hour. The maximum temperature for that date was 27.2 degrees Celsius, with the preceding days also marked by a notable chill.
Further data reveals that Tetulia saw temperatures of 9 degrees Celsius on 14 December, 9.3 degrees Celsius on both 13 and 12 December, and the season’s lowest so far of 8.9 degrees Celsius on 11 December.
The Met Office confirmed that a mild cold wave has been sweeping across the Tetulia region continuously since 11 December.
According to the BMD, a mild cold wave is declared when the mercury falls between 8.1 degrees Celsius and 10 degrees Celsius, a moderate cold wave when it drops between 6.1 degrees Celsius and 8 degrees Celsius, and a severe cold wave when temperatures fall between 4.1 degrees Celsius and 6 degrees Celsius.
