Tactical Weather Detection System


Lightning is the first physical property of a storm cell that can be detected, and unlike precipitation, lightning is the best determinant of dangerous thunderstorm activity.

Avidyne TWX670 Tactical Weather Detection System

Avidyne’s new TWX670 is a third-generation lightning-based weather detection system that provides a simple and intuitive color-contoured display with instantaneous picture of surrounding weather.

Great Accuracy Means Truly Tactical Weather Detection

The TWX670 is the first and only lightning-based, real time, tactical, color weather avoidance solution. It accurately detects and clearly displays electrical discharges– the primary indicator of thunderstorms–in real time, regardless of aircraft maneuvering. With its significantly-improved accuracy over previous-generation lightning detection systems, the TWX670 provides true tactical weather avoidance in the critical 0 – 25nm range, making it a perfect complement to the strategic benefits of satellite-based datalink weather.

Completing the Picture

Lightning is one of the first physical properties of a storm cell that can be detected, and unlike precipitation, lightning is the best determinant of dangerous thunderstorm activity. Storm cells and their intensities are displayed in color contours eliminating the guess-work associated with interpreting legacy weather displays. Providing a color-contoured map of a thunderstorm’s electrical activity over time, the TWX670 easily allows the pilot to determine the areas of greatest intensity, and clearly identify areas with potential for convective wind shear, turbulence, microbursts, hail and icing.

TWxCell Mode™

Avidyne TWxCell Mode

With the TWX670’s color-contoured TWxCell Mode, each cell grid is displayed as a hexagonal array of cell weights (colors). Color-filled hexagons highlight the most intense regions of thunderstorm activity, presenting a visually contoured color display with dynamic sectors. TWxCell Mode permits the pilot to quickly identify the most intense regions of thunderstorm activity.

The TWX670 combines the data of all lightning activity occurring over a running three-minute period, regardless of the number of strikes. This provides a meaningful dynamic map of the lightning discharge rate and density for immediate visual acquisition of critical information. With the TWX670, there’s no need to spend time observing discrete events to determine the level of thunderstorm activity.

Strike Mode

Avidyne TWX670 Strike Mode

In Strike Mode, up to 1024 strikes are displayed for up to 3 minutes. Each transmitted strike includes range, bearing, and weight (color). Regional activity, not age, determines the strike color. Strikes that are more recent but further away cannot “drown out” flashes that are closer and less recent. This provides a level of comfort to pilots transitioning from less capable systems. Color enhancement helps to identify areas of high intensity while still providing a view of the discrete events.

Versatile MHD300

Avidyne MHD300

Avidyne’s MHD300 can display TWX670 Lightning, traffic when interfaced with the TAS600-Series TAS, and TAWS when interfaced with a Honeywell EGPWS system. Its standard 3-ATI form factor allows for easy installation in virtually any fixed-wing or rotorcraft panel. NVG-compatible versions are also available. Click here for more information on the MHD300.


Specifications (Processor)

  • Width: 11.00" (279mm)
  • Height: 6.00" (152mm)
  • Depth: 3.00" (76mm)
  • 3.60lb (1.64kg)
System Power
  • 10-32VDC
  • 0.4A at 28VDC
  • 0.7A at 14VDC
Display Options
  • IFD540/440
  • EX600 MFD
  • Entegra/EX5000 MFD with Release 8.0
  • EX500 MFD with Release 4.0

Specifications (Antenna)

  • Width: 3.50" (88mm)
  • Height: 0.75" (88mm)
  • 0.37lb (0.17kg)

Specs subject to change without notice.

Weather products and coverage areas may be subject to change without notice.