RADAR MENU Velocity

Shows radial velocity (to and from the radar site) in any of several formats. It is expressed in knots. Positive velocity is always motion away from the radar, while negative velocity is always motion toward the radar. As a mnemonic it is useful to link positive ("typical") values to that of energy being transmitted from the radar ("typical" radar energy), and negative values as being associated with energy coming back the other way.

0.5 deg. Shows velocity from scan elevation 1, tilted 0.5 deg from the ground.

1.5 deg. Shows velocity from scan elevation 2, tilted 1.5 deg from the ground.

2.4 deg. Shows velocity from scan elevation 3, tilted 2.4 deg from the ground.

3.4 deg. Shows velocity from scan elevation 4, tilted 3.4 deg from the ground.

Short 32 nm (0.5 deg). Surprisingly, the radar generates a close-range velocity product with a gate resolution of only 790 feet! You can view this product here for looking at storms up close.

SRM 0.5 deg. Shows storm-relative mean radial velocity from scan elevation 1, tilted 0.5 deg from the ground. The storm-relative mean radial velocity (SRM) product is essentially the same as base velocity, but removes the component of the storm's motion, allowing velocity signatures to be more accurately analyzed. This product is preferable to the standard velocity products for storm forecasting. The source for the storm motion component is usually the average motion of all storms detected by the radar's SCIT storm tracking algorithm.

SRM 1.5 deg. Shows storm-relative mean radial velocity from scan elevation 2, tilted 1.5 deg from the ground.

SRM 2.4 deg. Shows storm-relative mean radial velocity from scan elevation 3, tilted 2.4 deg from the ground.

SRM 3.4 deg. Shows storm-relative mean radial velocity from scan elevation 4, tilted 3.4 deg from the ground.