What does OHD indicate regarding lightning in weather reporting?

The designation "OHD" specifically indicates that there is lightning reported within 5 statute miles of the observation point. This information is crucial for aviation safety, as lightning can pose significant hazards to aircraft during flight operations, especially during takeoff and landing phases.

Understanding this term helps pilots and aviation personnel make informed decisions regarding safety and operational procedures. The proximity of 5 statute miles serves as a critical threshold for assessing risk and responding appropriately, which may involve altering flight paths or delaying operations to ensure safety.

Other interpretations do not accurately convey the operationally significant distance related to lightning warnings. Therefore, recognizing "OHD" as indicating lightning within this specific range allows for better situational awareness and risk management in aviation contexts.