A method for output of weather information, the method comprising: at a processing device a) receiving weather reflectivity values; from a weather radar system; b) storing the received weather reflectivity values into a three-dimensional buffer (84, 120); c) generating a value based on received reflectivity values and an associated latitude/longitude position; by i) calculating a sum of the reflectivity value stored in a column of cells within the three-dimensional buffer ii) said calculating using the equation: ∑ i = 1 N Z i 4 7 h i Δ h wherein Z i is the reflectivity of the i-th cell in the column, h i is the altitude of the i-th cell in the column, N is the number of cells in the column in the three-dimensional buffer, and Δ h is the vertical size of the buffer cell; d) assigning a hazard indication to the reflectivity values at a latitude/longitude position when the generated value is above a first threshold; e) at a display device coupled to the processing device, generating a weather display based on data stored in the three-dimensional buffer including a display icon associated with the hazard indication. and f) repeating steps b to d in a loop for all columns in the three-dimensional buffer. at a processing device a) receiving weather reflectivity values; from a weather radar system; b) storing the received weather reflectivity values into a three-dimensional buffer (84, 120); c) generating a value based on received reflectivity values and an associated latitude/longitude position; by i) calculating a sum of the reflectivity value stored in a column of cells within the three-dimensional buffer ii) said calculating using the equation: ∑ i = 1 N Z i 4 7 h i Δ h wherein Z i is the reflectivity of the i-th cell in the column, h i is the altitude of the i-th cell in the column, N is the number of cells in the column in the three-dimensional buffer, and Δ h is the vertical size of the buffer cell; d) assigning a hazard indication to the reflectivity values at a latitude/longitude position when the generated value is above a first threshold; e) at a display device coupled to the processing device, generating a weather display based on data stored in the three-dimensional buffer including a display icon associated with the hazard indication. and f) repeating steps b to d in a loop for all columns in the three-dimensional buffer. a) receiving weather reflectivity values; from a weather radar system; b) storing the received weather reflectivity values into a three-dimensional buffer (84, 120); c) generating a value based on received reflectivity values and an associated latitude/longitude position; by i) calculating a sum of the reflectivity value stored in a column of cells within the three-dimensional buffer ii) said calculating using the equation: ∑ i = 1 N Z i 4 7 h i Δ h wherein Z i is the reflectivity of the i-th cell in the column, h i is the altitude of the i-th cell in the column, N is the number of cells in the column in the three-dimensional buffer, and Δ h is the vertical size of the buffer cell; i) calculating a sum of the reflectivity value stored in a column of cells within the three-dimensional buffer ii) said calculating using the equation: ∑ i = 1 N Z i 4 7 h i Δ h wherein Z i is the reflectivity of the i-th cell in the column, h i is the altitude of the i-th cell in the column, N is the number of cells in the column in the three-dimensional buffer, and Δ h is the vertical size of the buffer cell; d) assigning a hazard indication to the reflectivity values at a latitude/longitude position when the generated value is above a first threshold; e) at a display device coupled to the processing device, generating a weather display based on data stored in the three-dimensional buffer including a display icon associated with the hazard indication. and f) repeating steps b to d in a loop for all columns in the three-dimensional buffer.