National Weather Service United States Department of Commerce

Strengthening Storm in the Upper Great Lakes; Thunderstorms in the Ohio Valley and Mid-Atlantic

A strengthening storm system over the Upper Great Lakes will bring moderate to heavy snow to the Upper Peninsula of Michigan through Tuesday morning. Ahead of this system, strong to severe storms may develop over the Ohio Valley, portions of the Appalachians, and the Mid Atlantic Monday. Read More >

Overview

A system tracking northeast across the Upper Great Lakes brought with it anomalously warm temperatures aloft and record breaking precipitable water values, resulting in a significant, historic ice storm for this part of the county. Many locations saw moderate to heavy freezing rain, resulting in one-quarter to around or just greater than three-quarters of an inch of ice accretions. As the depth of the cold air began to increase as the system pulled out of the region, locations that saw primarily freezing rain did see precipitation switch over to or mix with sleet for a period of time. Across far south central and eastern Upper Michigan, especially near Lake Superior precipitation remained mostly rain, but a very cold rain. Across the northwest, especially over the Keweenaw Peninsula precipitation started out as freezing rain and sleet, but then quickly switched over to Monday morning.

 

Link below to a blog about this event written by the Cooperative Institution for Research in the Atmosphere (CIRA):

http://rammb.cira.colostate.edu/training/visit/blog/index.php/2019/02/07/4-february-2019-significant-ice-storm-in-the-upper-great-lakes/

 

Image
WFO Marquette webcam icing up during freezing drizzle and freezing fog on Sunday night, February 3rd leading up to the ice storm early Monday morning.

 

nws logo Media use of NWS Web News Stories is encouraged!
Please acknowledge the NWS as the source of any news information accessed from this site.
nws logo