sold snap Oct 2015
© WeatherBell.com
High altitude weather pattern simulated by GFS model shows big dip in the jet stream sharpening over the East this weekend. ()
A powerful cold front sweeping across the nation Thursday and Friday will deliver the first taste of winter weather to many locations in the eastern U.S. by Saturday.

The high elevations of the Northeast may experience their first flakes of snow Saturday night as low pressure off the coast feeds moisture into the cold air funneling into the region.
early snow October 2015
© WeatherBell.com
GFS model simulates snowfall in the high elevations of interior New England Saturday night. Some of what’s shown is lake effect snow, some is due to wrap around moisture from low pressure off the coast.
Temperatures by Sunday morning will be 10 to 25 degrees below normal from the Great Lakes to the Mid-Atlantic and Northeast.

Many locations will experience their first frosts and/or hard freezes from the central Appalachians to the north and northwest.
cold snap October 2015
© WeatherBell.com
Sunday morning forecast lows from GFS model
On Sunday afternoon, highs will only recover into the 40s in Northeast and northern Great Lakes, and 50s in the Ohio Valley and Mid-Atlantic.

The cold snap is the result of a steep dip in the jet stream setting up over the eastern U.S. during the middle of this week but sharpening by the weekend. This pattern configuration will allow Arctic air to dive southward.

High altitude weather pattern simulated by GFS model shows big dip in the jet stream sharpening over the East this weekend. (WeatherBell.com)

The taste of winter weather will be short-lived, however, as milder air surges eastward by Tuesday and Wednesday of next week.
cold snap October 2015
© WeatherBell.com
GFS model forecasts warm bubble moving over the eastern U.S. by Tuesday morning next week.