An aircraft system for detecting and presenting information relating to adverse airborne phenomena along a flight route of the aircraft, the system comprising: a data acquisition unit, comprising an imaging unit configured to acquire a plurality of infrared images of the external environment of said aircraft, said imaging unit comprising: an IR detector, configured to detect IR radiation; and a tunable spectral filter, configured to selectively transmit at least one IR wavelength band of incident light to said IR detector, characterized in that when said imaging unit operates in a scanning mode, said TSF is tuned to transmit all detectable IR wavelength bands, and said IR detector is configured to acquire wideband IR images of said environment, and wherein when said imaging unit operates in an investigation mode, said TSF is tuned to transmit selected IR wavelength bands, and said IR detector is configured to acquire narrowband IR images of said environment, each of said narrowband IR images respective of a different IR spectral band; a data analysis unit, configured to receive and process the acquired wideband IR images to detect at least one potential adverse airborne phenomenon in said environment, said data analysis unit further configured to receive and process the acquired narrowband IR images to verify and to determine at least one characteristic of a detected potential adverse airborne phenomenon, based on at least the spectral signatures of environmental features in said narrowband IR images; and a display unit, configured to dynamically display a visual representation of the detected adverse airborne phenomenon and determined characteristic thereof, overlaid onto a view of said external environment displayed to an operator of said aircraft. a data acquisition unit, comprising an imaging unit configured to acquire a plurality of infrared images of the external environment of said aircraft, said imaging unit comprising: an IR detector, configured to detect IR radiation; and a tunable spectral filter, configured to selectively transmit at least one IR wavelength band of incident light to said IR detector, characterized in that when said imaging unit operates in a scanning mode, said TSF is tuned to transmit all detectable IR wavelength bands, and said IR detector is configured to acquire wideband IR images of said environment, and wherein when said imaging unit operates in an investigation mode, said TSF is tuned to transmit selected IR wavelength bands, and said IR detector is configured to acquire narrowband IR images of said environment, each of said narrowband IR images respective of a different IR spectral band; an IR detector, configured to detect IR radiation; and a tunable spectral filter, configured to selectively transmit at least one IR wavelength band of incident light to said IR detector, characterized in that when said imaging unit operates in a scanning mode, said TSF is tuned to transmit all detectable IR wavelength bands, and said IR detector is configured to acquire wideband IR images of said environment, and wherein when said imaging unit operates in an investigation mode, said TSF is tuned to transmit selected IR wavelength bands, and said IR detector is configured to acquire narrowband IR images of said environment, each of said narrowband IR images respective of a different IR spectral band; a data analysis unit, configured to receive and process the acquired wideband IR images to detect at least one potential adverse airborne phenomenon in said environment, said data analysis unit further configured to receive and process the acquired narrowband IR images to verify and to determine at least one characteristic of a detected potential adverse airborne phenomenon, based on at least the spectral signatures of environmental features in said narrowband IR images; and a display unit, configured to dynamically display a visual representation of the detected adverse airborne phenomenon and determined characteristic thereof, overlaid onto a view of said external environment displayed to an operator of said aircraft.