Average Wind Speeds - Map Viewer

U.S. Wind Climatology - Monthly

Dataset Tabs Default Display


This tool shows maps of average monthly wind speed and direction for the contiguous United States from 1950 to the present. Within the tool, click the Overview link in the upper right for information about the maps.

Maps show the average (mean) wind speed as well as two components of wind direction: U-wind represents the east-west component of wind and V-wind represents the north-south component. For each month and parameter, the tool shows the climatological mean wind (average over the previous three decades), observed winds, and wind anomaly (how much faster or slower wind blew compared to the long-term average for that month).

Where did these data come from?

The National Centers for Environmental Prediction (NCEP) and the National Center for Atmospheric Research (NCAR) used a computer model of Earth's atmosphere and a database of atmospheric pressure measurements from around the world to produce a picture of how Earth's atmosphere has moved since 1948. This dataset is called the NCEP/NCAR Reanalysis. Knowing the difference in atmospheric pressure from one location to another enabled scientists to program the model to compute wind speeds. Colors on these maps indicate the estimate monthly average wind speeds calculated from the Reanalysis data.