NASAs GRACE-FO shows North America was almost entirely above its long-term average in mass in May 2019, due to Midwestern flooding, with the runoff raising the Great Lakes to record levels.

North America was almost entirely above its long-term average in mass in May 2019, due to Midwestern flooding, with the runoff raising the Great Lakes to record levels.

For more information on GRACE-FO, go to https://gracefo.jpl.nasa.gov/.

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