What does LTG OHD indicate in a METAR report?

In a METAR report, the term LTG OHD indicates that there is lightning occurring overhead. This specific notation is used to convey to pilots and meteorologists that lightning activity is happening directly above the observing station.

This information is critical for flight operations as lightning poses a significant hazard, especially during takeoff and landing phases. The acknowledgment of "overhead" signifies a heightened level of caution, as overhead lightning can lead to immediate changes in weather conditions or pose risks to people and aircraft on the ground.

The other choices refer to different situations related to lightning but do not accurately describe the specific phrase "LTG OHD." For instance, options related to near runway lightning or cloud-based lightning do not focus on the immediate danger posed by lightning directly overhead, which is the essence of the "OHD" designation.