Fig. 2
From: Evaluation of heat wave forecasts seamlessly across subseasonal timescales

Lead beyond which skill of NCEP model forecasts of EHF falls below that of a climatological forecast for Tmax (top), Tmean (middle), and Tmin (bottom) with different validation approaches against observations and MERRA-2 temperature analyses. Widths of colors in the bars at the bottom of each panel reflect the fractional area in each map; median value in days is given in the corner of each panel