What is the minimum distance recommended to avoid flying between intense radar echoes from thunderstorms?

The minimum distance recommended to avoid flying between intense radar echoes from thunderstorms is 40 miles. This distance is significant because thunderstorms can produce severe turbulence, lightning, hail, and other dangerous weather phenomena. Radar echoes indicate areas of precipitation and, often, the most intense echoes represent the most severe aspects of thunderstorms, including updrafts and downdrafts that can be hazardous to aviation. By maintaining a distance of at least 40 miles, pilots can ensure they are well clear of the potential dangers associated with thunderstorms, thus enhancing safety during flight operations. The 40-mile guideline is established based on aircraft performance capabilities and the nature of storm development, allowing for an ample buffer to safely navigate around threatening weather conditions.