Although a maximum of 28.6C was recorded on Tuesday, Marlborough has not technically experienced a heatwave. The heatwave threshold for Wiltshire is 27C and for a heatwave to be declared there must be three consecutive days when the threshold is exceeded. We have now had two consecutive days when the peak exceeded 27C, that was 27.8C on Monday and 28.6C on Tuesday but Sunday only reached 25.1C. If the maximum today is above 27C, we will be experiencing a meteorological heatwave.
The loss of equivalent rainfall through evaporation reached 5.18mm on Tuesday. So far this month the total loss to the atmosphere is 48mmm compered to the rainfall of 14.8mm.
It was a cool night as the thermometer sank to 8.6C being 1.5C below the average.
Wednesday arrived with strong sunshine again. By 08.00 the thermometer had reached 15.3C and was rising steadily.
Update at 18.00: a maximum of 27.6C was logged at 17.52 today. Therefore, Marlborough has experienced a meteorological heatwave as three consecutive days with maxima above the 27C threshold have occurred, namely 27.8C, 28.6C and 27.7C respectively.