Fig. 6
From: Evaluation of heat wave forecasts seamlessly across subseasonal timescales

Correlation of daily near-surface soil moisture (SM) with evaporative fraction (EF) in MERRA-2 and the NCEP forecast model (top row); Miralles et al. heat wave index Î (middle row) and the change in Î in the NCEP forecast model between 10- and 2-day forecast lead (bottom left) and between 28- and 2-day forecast lead (bottom right)