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Course Info: Madden-Julian Oscillation (MJO): Assessing Midlatitude Subseasonal Impacts

Madden-Julian Oscillation (MJO): Assessing Midlatitude Subseasonal Impacts 

 

Course Description 

This short interactive lesson provides an introduction to the impacts associated with the Madden-Julian Oscillation (MJO), a tropical phenomenon that can influence weather at subseasonal scales as it moves eastward across the globe. These influences can extend to midlatitudes including the contiguous U.S., and even as far northward as Alaska. In two sample cases in the lesson, learners can assess the influence of MJO events on temperature and precipitation patterns at U.S. midlatitude locations. The cases highlight various NOAA Climate Prediction Center (CPC) products including phase-space diagrams with the Realtime Multivariate MJO (RMM) index (Wheeler-Hendon plot), MJO Temperature and Precipitation Composites, and the Global Tropical Hazards (GTH) outlook.  

 

Intended Audience

The intended audience for this lesson includes forecasters—particularly those outside tropical regions—who want to assess potential impacts of the Madden-Julian Oscillation (MJO) for a particular region or sector and summarize subseasonal outlooks for local stakeholders. The lesson can also appeal to students and others interested in tropical influences across larger geographic scales.

 

Publication Date

February 5, 2025

 

Questions or Comments? 

We welcome any comments or questions you may have regarding the content, instructional approach, or use of this lesson. Please e-mail your comments or questions to Amy Stevermer (asteverm@ucar.edu). For technical support, please visit our Registration and Support FAQs.