The Federal Reserve's database used for monitoring banks suffered a temporary disruption last month, prompting alarm from the top Democrat on the U.S. Senate committee overseeing the central bank regarding the consequences of staffing cuts among Fed supervisors.

The Fed confirmed that parts of its system, known as the National Information Center (NIC), went down on August 5. A Fed spokesperson stated that the disruption temporarily affected the NIC's public website, while critical functions remained operational.

People familiar with the matter said internal systems were also impacted. Regulators rely on this system to oversee banks, with the data encompassing both public and confidential information.

A copy of an internal email revealed that staff were notified during the outage, acknowledging that "critical data pipeline tasks from the National Information Center have continued to fail, causing significant downstream impacts across multiple Federal Reserve business areas." One of the affected areas was the Fed's discount window, the primary channel for directly lending to banks, which is vital to banks during times of crisis.

The NIC is managed by the Fed, and two other major bank regulators, the Federal Deposit Insurance Corporation and the Office of the Comptroller of the Currency, also rely on the system. Supervisors use it to track and share banking information, and it includes a searchable public website that aggregates publicly available bank data.

The cause of the outage has not yet been determined. Senator Elizabeth Warren wrote to Michelle Bowman, the Fed's vice chair for supervision, on September 11, pointing out that the incident raised worries that staff reductions have hindered the Fed's ability to maintain the NIC system.

Bowman, who was appointed by President Trump last year as the Fed's top banking regulator, has pushed to roll back regulations she and many Trump administration officials view as excessive following the 2008-2009 financial crisis, and has reduced staff in the Fed's Board of Governors supervision division by approximately 30%.

In a separate letter to top officials at the Fed, the FDIC, and the OCC, Warren expressed concern about the broader effects of the staffing cuts. She wrote that reductions in bank examiner positions across federal agencies raise doubts about regulators' ability to detect and respond to emerging risks.