Abstract: A wind warning system. The system includes: an alarm module configured to provide a audio signal; a power module configured to provide power to the alarm module; and a trigger module configured to trigger actuation of the alarm module. There is also a wind-speed sensor module configured to provide a signal to the trigger module when wind is detected having a speed higher than a predetermined threshold. The trigger module includes an electrically conductive protruding member. The wind-speed sensor module includes: a shaft member; a fan rotatably and slidably coupled to the shaft member; and a bias member coupled to the shaft member and in mechanical communication with the fan. Additionally, there is: a vertical shaft coupled to the shaft member; a tower rotatably coupled to the vertical shaft member. Moreover, there is an adjustment device that selectably adjusts a tension of the bias member, thereby altering a threshold.