Computer forecast models generally can not resolve the topography of the Gorge and hence model predicted winds are often inaccurate. However, models can predict localized air pressure changes with a great deal of accuracy and it's these pressure differences (gradients) that drive the winds through the Gorge. The above "windbow" is a tool that our Meteorologists have developed to provide a powerful quick look of model predicted gradients.
- The cumulative height of the curve is the total pressure difference across the Gorge. The higher the curve, the stronger the wind.
- Each color of the graph is the gradient contribution between 2 locations. The thicker the color, the stronger the wind.
- Westerlies are indicated by a positive gradient (above x-axis), Easterlies indicated by a negative gradient (below x-axis).
- See our FAQ section here for additional information.
Note: This product is still in the experimental stage. Over time we will learn to correlate exact gradient values to observed winds.