December featured a classic La Niña winter pattern across the Lower 48, with record warmth along the West Coast and colder air with snow across the northern Plains and Northeast. However, since the start of the New Year, the once-dominating winter weather pattern has been put on pause, making way for a classic January thaw.

According to the FOX Forecast Center, long-range guidance indicates a return of these conditions, which would bring warmer temperatures back to the West and periodic windows of cooler air and potential snow across the Northern Tier.

LA NIÑA WINTER IS COMING BACK: MILLIONS CAN EXPECT A WARMUP IN THE WEST AND BITTER COLD IN THE NORTHERN TIER

Over the next one to two weeks, there is expected to be a notable shift in the weather pattern, as a strong ridge of high pressure over the eastern Pacific moves into the western United States. The shift will bring an end to the widespread rain and snow along much of the West Coast through next week and possibly beyond.

Forecasts suggest the ridge will remain in place and keep the jet stream well north and result in below-average precipitation and a return to warmer-than-average temperatures. 

While the ridge strengthens in the West, the jet stream is expected to extend from southern Canada into the Southeast, similar to the December pattern. This increases the likelihood of colder air pushing into the Upper Midwest and Northeast, where below-average temperatures are expected in mid to late January.

Any storm systems that track along the jet stream could also bring additional chances for snow to the East as a more active weather pattern looks likely.

Longer range forecast models are also showing the possibility for a system to develop along the East Coast as the La Niña pattern begins to take shape late next week.

“Right now it looks like numerous pieces of energy will phase, as a dip in the jet stream pushes east. This will increase the potential for a surface low to develop across the Southeast,” according to the FOX Forecast Center.

HOW TO WATCH FOX WEATHER

The system could either move out into the Atlantic or along the Eastern Seaboard.

Behind this system, another could form, which may have a better chance at bringing impactful snow and rain across the East as a blocking high slows things down. 

With any longer range outlooks, changes in the forecast may occur since the projected timeframe is over a week out. The FOX Forecast Center will continue to monitor the latest changes in guidance in the coming days.