Hikers approaching the White Mountains in New Hampshire should be prepared for winter conditions above treeline through early June. The Presidential Range still has significant snow coverage, and several hikers have reported icy conditions on exposed ridge walks requiring microspikes and extreme caution. Afternoon thunderstorms have been intense and dangerous for hikers caught above treeline. Weather can change in minutes from clear skies to zero visibility with high winds and lightning. Do not attempt the Presidentials without proper cold weather gear including insulated layers, rain protection, and traction devices. Consider staying at lower elevation until conditions improve or check weather forecasts carefully and start alpine sections before dawn to avoid afternoon storms. AMC huts can provide current condition updates and weather information.