Regional Jet 900 (CRJ900)
Flight Crew Air Transport Pilot (ATP)
Confusion; Situational Awareness
Deviation - Altitude Overshoot; Deviation / Discrepancy - Procedural Clearance
Air Traffic Control Issued Advisory / Alert; Flight Crew Became Reoriented; Flight Crew Returned To Clearance
Human Factors; ATC Equipment / Nav Facility / Buildings
While on the BAINY ONE RNAV arrival to MSP; we were issued the clearance to descend via the arrival and expect runway 30R. Passing through FL180; we obtained the current ATIS and completed the descent check. I looked over the weather and we both commented on the fact that the winds were not as forecast; but we failed to realize that the time stamp associated with the digital ATIS was for XA:53Z. The current time was XL:44Z. The XL:44X was correctly displayed on the digital ATIS above the main body of the ATIS. Following the ATIS is where there was the time stamp of XA:53z. We set the published altimeter of 30.11 and continued on the arrival. We complied with all the crossing restrictions to the best of our knowledge until we were switched over to approach. The controller cleared us to descend to nine thousand feet. This was prior to the published crossing restriction of ten thousand feet and 250 knots at GOPHER. We followed the instructions and started to descend. We descended approximately 800 feet when we were questioned as to our indicated altitude. We were told they showed us at 8600 feet; assigned was 9000 feet. We were then told the current altimeter setting which was 29.52 and issued a clearance to return to 9000 feet. We set the current altimeter and climbed to 9000 feet. We were then notified that ATC was seeing multiple aircraft having issues with the digital weather. This was a nationwide event and that it was a result of SABER or Commercial Radio. We figured that since there was such a large altitude deviation; we needed to submit a report even though we were assured by ATC that we were OK and not in trouble. Lack of attention to detail and the inaccurate ATIS provided to us via ACARS. Attention to all the details of the ATIS. Double check when something doesn't match up; i.e. forecast and current weather. Cross check information.
CRJ900 Captain reports obtaining old digital ATIS during descent into MSP resulting in descent below assigned altitude due to an incorrect altimeter setting. ATC detects the error and states that it is a nationwide event.