Given the steady pressure and overcast conditions typical of April, trout will be active throughout the morning and midday window, so work shallow margins and mid-water depths where chironomid pupae and early daphnia are concentrated. If the wind remains light at 4mph, use a long leader with small nymphs (size 16–18) on a floating line to exploit the stable water; if gusts reach 15mph, switch to a heavier intermediate line and fish larger patterns (size 12–14) in slightly deeper water where wind-driven drift becomes an asset. The 96% cloud cover suppresses light penetration, which means trout will forage higher in the water column than on bright days—favour drifts over deep basins and watch for rises to emerging chironomids. Peak activity typically holds from 5am through mid-morning as water temperature stabilizes, then lessens after 11am as thermal stratification begins; concentrate your effort in the early window if possible. Should you encounter a brief bright spell, drop to finer tippet and smaller flies, as spring trout remain alert despite overcast conditions.