WIND Toolkit Downloads Pressure in hPa

[cpaulgilman]

The WIND Toolkit HRRR MET API returns air pressure data in hPa. SAM's wind power model expects pressure data in atm or Pa.

SAM's wind power model runs with pressure data in hPa but resulting capacity factor is close to zero.

Note that pressure data from different WIND Toolkit datasets is in different units.

Workaround is to manually convert pressure data in CSV file after downloading it to atm (divide by 1013.25 hPa/atm) or Pa (multiply by 100 Pa/hPA).

To Reproduce

1. Create a wind case.
2. On the Wind Resource page, click Download and download a file with 80m data.
3. Click Simulate.
4. Note capacity factor of zero.

Operating System and Version

SAM 2026.7.3