Wind data extracted from the RU-Weather Research and Forecasting Model (WRF) model.  The model is run daily at 00Z with forecast files saved every hour.  Times in this file are UTC based on the forecast time.  The forecast_offset specifies how many hours of model spin up are allowed before the data is included in this virtual time-series archive for a given day.  For example, a value of 6 means the first 6 hours of data for a day are actually extracted from the previous day's model run.

cdm_data_type = Grid
VARIABLES (all of which use the dimensions [time][z][latitude][longitude]):
eastward_wind (U-component of wind, m s-1)
northward_wind (V-component of wind, m s-1)
wind_speed (m s-1)
wind_from_direction (Wind Direction, degree)