Environment

Another round of heavy snow, freezing rain and below average temperatures from the Plains to the Northeast, U.S.


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An intensifying low pressure system is expected to bring another round of heavy snow and freezing rain across the Central Plains through the Great Lakes into the Northeast. Road conditions are likely to deteriorate quite rapidly even at lower-elevation areas as the storm brings a mix of ice and rain.

An area of low pressure is expected to continue to deepen Thursday, February 7, 2019, along the strong arctic front stretching from the Southern Plains into the Mid Mississippi Valley, the National Weather Service forecaster Oravec notes.

This low will be pushing northeastward into the Great Lakes region by Thursday evening and into eastern Canada Friday, February 8, supporting heavy snows from the Upper Mississippi Valley into the Upper Lakes and accumulating freezing rain from the Lower Great Lakes into Northern New England.

Blizzard conditions are possible today on the northwest portion of this storm from eastern portions of North Dakota, northeast South Dakota into western Minnesota. Blizzard warnings are currently in effect across these areas for the day on Thursday.

In the wake of the deepening low moving into the Great Lakes/Eastern Canada, the trailing arctic front will be pushing east from the Southern Plains into the Lower to Mid Mississippi Valley and Ohio Valley Thursday and through the Eastern Seaboard on Friday.

This front will bring much colder air across these regions over the next 2 days, replacing the recent much above average temperatures with below average temperatures.

High temperatures will be 14 – 22 °C (25 – 40 °F) colder Friday than Thursday across the Southern Plains, Lower to Mid Mississippi Valley and Ohio Valley and 10 – 14 °C (20 – 25 °F) colder Saturday than Friday along the east coast.

The coldest temperatures over the next few days will be across the Northern Plains where highs will stay below zero (°C / °F) into this weekend.

A secondary surge of arctic air will be pushing into the Northern Plains, Northern Rockies and portions of the Pacific Northwest late Friday into Sunday, February 10.

The large scale flow pattern supporting the secondary arctic surge into the Northern Plains will also support heavy snow potential into the Pacific Northwest late Friday into Saturday.

Snow levels will be falling as a strong mid to upper level closed low strengthens along the B.C./Washington State coastal area. This will support accumulating snow potential at lower elevations late Friday into Saturday across the Pacific Northwest.

Featured image credit: NWS La Crosse

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