Absolute temperature maximum TXX (°F, upper part) for each calendar day between 1 May to 30 September from 1911–2023, the corresponding smooth 30-day MEVSS curve is bold, and the MEVSS-TXX + 3 STD curve dashed. The + 3 STD curve has been computed with a 60-day MEVSS filter. Mean daily temperature maximum (°F, lower part) from 1911–2023, the corresponding 30-day MEVSS curve (bold) and the 60-day MEVSS- + 3 STD curve (thin). For the definition of MEVSS curves see text.