Tracking Late December Winter Storm Expected to Impact the Northern Plains through the Northeast U.S.

A winter storm system will rapidly intensify over the Midwest on Sunday and track through the Great Lakes on Monday. Periods of heavy snow are anticipated across the Upper Great Lakes late Sunday and continuing into Monday. At least 1/10 inch of ice accumulation is expected from a wintry mix across much of the interior Northeast U.S. starting Sunday afternoon. Read More >

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Figure 12: ETA 12 Hour Forecast of Surface to 3 kilometer Helicity
and Boundary Layer Wind valid 1200 UTC May 12, 1997.

Figure 13: ETA 18 Hour Forecast of Surface to 3 kilometer Helicity
and Boundary Layer Wind valid 1800 UTC May 12, 1997.

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Tracking Late December Winter Storm Expected to Impact the Northern Plains through the Northeast U.S.

GEMPAK Helicity