A blistery and chilly day was expected in the Midwest and Great Lakes on Wednesday, while the Pacific Northwest was forecast to remain wet and cool.
A strong low pressure system was forecast to continue tracking eastward and push further into the Northeast and New England. The system was expected to pull a cold front with it, and could extend down the Mississippi River Valley.
The system was expected to weaken in the South, and track northeastward up the Ohio River Valley by evening.
Ahead of the system, seasonably warm temperatures were expected to persist with highs in the mid-50s. Much cooler weather was forecast behind the front. Highs in the Upper Midwest and Northern Plains could drop by 10 degrees in some places, with highs ranging around the mid-30s to 40.
Residual moisture over the region, along with near freezing temperatures over the region, may allow for light snow showers in the North. Snowfall accumulation was expected to be less than a half of an inch.
Rainfall along the front was forecast to remain light with no more than a half of an inch expected over the Midwest and into New England.
The Central and Southern Plains were expected to remain chilly as cool air pours in from the North. Highs near 60 were expected, while frost and freeze advisories would likely remain in effect over Oklahoma as overnight lows could dip to near freezing again on Wednesday night.


Out West, a low pressure system in the Pacific Ocean was forecast to continue bringing cool conditions with scattered showers over the Pacific Northwest. Less than a half of an inch of rain was expected, while higher elevations of the Cascades and Northern Rockies could see a few flurries.
On Tuesday, temperatures in the lower 48 states ranged from a low of -2 degrees at Gunnison County, Colo., to a high of 86 degrees at West Kendall, Fla.