Early Season Snow Storm & Bitter Cold Impacts Northern U.S.
A potent upper-level low will continue to push southeastward into the Pacific Northwest today through tomorrow. In association with this low, a significant, early season snowstorm is expected across the northern portions of the United States, including portions of the Northwest, Northern Rockies, and into North Dakota.
500 mb Height Anomaly
Snowfall is set to begin tonight at higher elevations of the Cascades and Northern Rockies, spreading out across portions of Montana overnight into northwestern North Dakota early tomorrow morning. As temperatures continue to fall, snow will start to occur at lower elevations as well. While the greatest accumulations look to occur tonight through Thursday morning, additional areas of snow will be possible into the end of the week as a wave of upper-level energy moves through.
Snowfall amounts through Friday morning of 5-10” are expected across a large portion of Montana into North Dakota, with localized heavier amounts of around 12-13”. Areas of 1-2 FEET. are possible for the higher elevations of the Northern Rocky Mountains and Cascades.
Winter Storm Warnings, Winter Storm Watches, and Winter Weather Advisories have been issued across the aforementioned areas. You can get the latest alerts from www.weather.gov.
Temperatures across portions of Washington State, Idaho, Montana, and North Dakota are forecast to drop dramatically as this system passes. These areas will see a 24-hour temperature drop of around 10-20° F between mid-afternoon today and tomorrow!
Temperatures by Thursday morning will fall into the teens and even single digits across the Northern Plains. By Friday morning, significant cold air will descend into Montana, western portions of the Dakotas, and Wyoming as low temperatures bottom out in the single digits to near 0°F. Low temperatures will be roughly 20-30°F below average!
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