A method performed by a system on an aircraft, the method comprising: receiving weather radar data; storing the received weather radar data in a three-dimensional memory; calculating vertically integrated reflectivity using the stored weather radar data at a predefined reference altitude at one or more locations from the aircraft; and adjusting a lower boundary of a relevant weather envelope from a first value to a second value, if the calculated vertically integrated reflectivity is greater than a predefined threshold, wherein the reference altitude is greater than 29,000 feet, wherein the first value is closer to at least one of a flight plan altitude or an altitude associated with flight path angle than the second value, wherein the second value is 25,000 feet, wherein the first value is between 3,000 and 5,000 feet from the at least one of flight plan altitude or altitude associated with flight path angle, and wherein range of the adjusted lower boundary of the relevant weather envelope is associated with the weather radar data having the calculated vertically integrated reflectivity greater than the predefined threshold; displaying on a display device the weather radar data located within the relevant weather envelope in a first manner; and displaying on the display device the weather radar data located outside of the relevant weather envelope in a second manner. receiving weather radar data; storing the received weather radar data in a three-dimensional memory; calculating vertically integrated reflectivity using the stored weather radar data at a predefined reference altitude at one or more locations from the aircraft; and adjusting a lower boundary of a relevant weather envelope from a first value to a second value, if the calculated vertically integrated reflectivity is greater than a predefined threshold, wherein the reference altitude is greater than 29,000 feet, wherein the first value is closer to at least one of a flight plan altitude or an altitude associated with flight path angle than the second value, wherein the second value is 25,000 feet, wherein the first value is between 3,000 and 5,000 feet from the at least one of flight plan altitude or altitude associated with flight path angle, and wherein range of the adjusted lower boundary of the relevant weather envelope is associated with the weather radar data having the calculated vertically integrated reflectivity greater than the predefined threshold; wherein the reference altitude is greater than 29,000 feet, wherein the first value is closer to at least one of a flight plan altitude or an altitude associated with flight path angle than the second value, wherein the second value is 25,000 feet, wherein the first value is between 3,000 and 5,000 feet from the at least one of flight plan altitude or altitude associated with flight path angle, and wherein range of the adjusted lower boundary of the relevant weather envelope is associated with the weather radar data having the calculated vertically integrated reflectivity greater than the predefined threshold; displaying on a display device the weather radar data located within the relevant weather envelope in a first manner; and displaying on the display device the weather radar data located outside of the relevant weather envelope in a second manner.