La Nina to influence winter weather, officials predict


La Nina to influence winter weather, officials predict

A colder than normal winter is predicted for southern Alaska, the Pacific Northwest and the Northern Tier states.

The National Oceanic and Atmospheric Administration released its region-based forecast for above and below average temperatures and precipitation.

La Niña is the biggest influencer in its forecast, and it's also the biggest wildcard, as there's now a 55 to 65 percent chance it actually develops. "Typical La Nina patterns during winter include above-average precipitation and colder than average temperatures along the northern tier of the USA and below-normal precipitation and drier conditions across the South".

A better-than-average chance of below-normal temperatures is forecast for Minnesota, particularly from January into February.

NOAA's Climate Prediction Center calls for colder than average temperatures across the Pacific Northwest in 2017-18.

The climate signals in these areas are not strong enough to tilt the odds either way, NOAA said. Sometimes a long-term weather pattern will emerge and nudge the chances in one of these categories.

NOAA graphic shows winter precipitation outlook.

The temperature outlook for winter is trending on the warm side for the south.

NOAA's winter outlook doesn't forecast snow or specific storms, but La Ninas tend to favor more storms coming from the west and north than from the Gulf of Mexico or the East Coast, he said. In its USA winter forecast released earlier this month, Accuweather predicts that some chilly winter weather is in store for the Northeast and mid-Atlantic, with January threatening to bring the coldest air of the season.

Halpert said the southern likely to be drier than normal, while the north from eastern Washington through the Great Lakes to update NY is likely to be wetter. "It's a good area to head out to if you're a big skier", Pastelok said.

This winter is expected to be snowier than usual for Chicago.



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