Definition
A weather product displayed on a Multi-Function Display (MFD) that shows the location of recent cloud-to-ground lightning strikes as symbols overlaid on a moving map. The data is gathered by ground-based lightning detection networks, transmitted to the aircraft via a weather data link such as ADS-B FIS-B or satellite weather (e.g., SiriusXM), and refreshed at intervals defined by the provider. Each symbol marks where a strike was detected during the most recent reporting period.
Plain English
A map view in the cockpit that shows where lightning has recently been hitting the ground, so the pilot can see where thunderstorm activity is happening.
Context Anchor
Seen on an MFD or other cockpit weather display when viewing electronic weather information.
Why Pilots Care
Allows pilots to identify and avoid areas of convective activity that pose risks of turbulence, icing, and structural damage.
Grounding Statement
If the display shows several lightning symbols along your route, picture active storm cells in that area and plan to stay well away from them.
Intuition Check
Do not assume each symbol is a perfect, real-time location of a strike. Use graphical lightning strikes (LTNG) as a warning that storm activity is nearby, not as a precise boundary you can safely skim.
Example Sentence 1
The pilot enabled the LTNG overlay on the MFD and saw a cluster of strikes 30 miles ahead, prompting a 40-mile deviation around the cell.
Example Sentence 2
Graphical lightning strikes appeared on the display ten miles ahead, prompting a course deviation.