A strengthening La Nina plus a significant northeastward shift of the jet stream in Canada will generate average to well-below-average temperatures across the Midwest and eastward. That's the word from Ag Meteorologist Greg Soulje.
So lay in an extra wood supply. Move some hay bales closer to the animals that may be needing them after heavy snow fall. The weather may be more erratic than usual.
As that jet stream periodically penetrates southeastward, it'll push bouts of severe cold into the East. Driven by an intensifying La Nina event, look for an active precipitation pattern for the Great Lakes region, Northeast and New England.
The La Nina effect is responsible for greater gyrations in the jet steam and widely-fluctuating temperatures and types of precipitation. Unfortunately, it's also likely to continue drought conditions in the Southwest.
The Northeast and New England region will continue to deal with a far more active pattern compared to a traditional winter. Since the late summer and fall of 2011, this region has seen an abundance of moisture – with more to come.
That's likely to mean more snow. The main storm track appears to be originating from the southwest. So moisture totals (including snowfall) will be above average.
Meanwhile, upper level winds are also forecast to frequently shift in from the northwest. As a result, very cold to bitterly cold air masses are forecast rapidly moderate. In addition, numerous thaws are also expected as a southerly flow also occurs.
This pattern may very well extend deep into springtime. The frequent intrusions of cold across the lower Great Lakes region will also generate spells of heavy to excessive lake-effect snowfall in downwind locales of western New York.