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NCAR Advanced Research Computing

Information, news and other support for our HPC user community.

Upcoming Outages: Derecho (3 days, 8/31-9/2); All Services (1 day, 9/1)

August 2, 2026

CISL is planning HPC system outages for the following services on an overlapping schedule: • All user-facing services: Tuesday, September 1 • Derecho: Monday, August 31 – Wednesday, September 2 All system services will be sporadically unavailable on Tuesday, September 1 to allow for necessary software upgrades and hardware maintenance. This includes Casper, filesystem access, and Quasar, along...

Announcing sam.hpc.ucar.edu

August 2, 2026

After a lot of internal development, the new SAM web interface is ready for you to use: https://sam.hpc.ucar.edu. Sign in with your usual UCAR SSO and you'll land on a dashboard for your stuff. My Accounts lists every project you belong to, with allocated / used / remaining for each resource, how fast you're burning it, and when it expires. My Jobs gives you your recent job history on Derecho a...

Read the article: Neighborhood-level wind forecasts are on the horizon

June 29, 2026

NSF NCAR researchers are leveraging the Derecho supercomputer to develop groundbreaking, neighborhood-scale wind forecasts down to a two-meter resolution. By pairing uncrewed aircraft observations with FastEddy—an advanced microscale model—scientists can simulate how real-time wind gusts and turbulence interact with local buildings and trees. This innovative use of computational resources deliv...