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As multiple disturbances move in from the West, leading to snow in the Northern Tier and flooding rains across much of the East, in between will be the battle between the warm and cold air. Based on the forecast atmospheric profile, the setup is conducive for freezing rain, and days of it for some areas. With freezing rain, you need a thick layer of warm air aloft and a thin layer of freezing temperatures at the surface. This allows for snowflakes to melt into raindrops as they fall from the clouds, then once they hit the ground, those raindrops will freeze on contact, therefore coating all surfaces in ice. Below, we have a side-by-side comparison of the 850 millibar temperatures, which is at about 1000 feet in altitude, and the surface temperatures for midday Monday. We then outlined where freezing rain is possible in the black on both maps. This…

A very potent upper-level low has moved into the intermountain West associated with a trough of low pressure, that will become near-stationary across this region during much of this week. While this low brings heavy snow to much of the West, a couple disturbances spinning around the main upper-level disturbance will fuel the waves of snow that will move through the Northern Plains Sunday through Tuesday evening of this week. On Sunday, a swath of light to moderate snow will affect eastern Montana and all of North Dakota throughout the morning while that snow extends into northern Minnesota and lasts through much of the day. Snow will also work into extreme-northern Wisconsin and the western Upper Peninsula of Michigan by the evening and will continue through much of the overnight hours. Meanwhile back toward the west, our next round of snow will start to take shape with snow moving into…

Our winter storm will begin to get its act together as it develops this Saturday. In the Ohio Valley, colder air will intrude, allowing for snow to fall north of the river, although accumulations will be light and between a coating to two inches for most areas–if anything. It’s not until you get into portions of the Mid-Atlantic and Northeast where significant snowfall is expected as the low pressure develops near the Outer Banks. Snow will break out and move into the Mid-Atlantic region this afternoon. Snow is forecast to fall across eastern Ohio into much of Pennsylvania, New York, and down into portions of Maryland and West Virginia, including Washington D.C., Baltimore, and Philadelphia. By the evening and the first half of Saturday night, the snow will expand eastward as our storm quickly develops just off the coast, into cities like New York, Hartford, and Boston. Snow will begin…

The active weather continues across the Northwest as a new storm moves in this weekend. A very potent upper-level disturbance will drop southward from the Gulf of Alaska, into the Northwest, and eventually into the Southwest US during the start of next week.  It is this disturbance that will bring a widespread snow to the intermountain West, a region that has been experience snowfall deficits so far this winter. On Friday, rain showers will begin to sneak in ahead of the main disturbance into the Washington and Oregon coast while snow falls in portions of the Cascades, mainly in Washington state. A heavy snow is also expected to fall in portions of the northern Rocky Mountains in northern Idaho and western Montana. It’s not until Friday night when the activity will begin to ramp up as our upper-level disturbance takes a southward plunge into the Northwest US. Most of the…

As a cold front moves through, this will set the stage for a fresh batch of cold air to sit over the Northeast region on Saturday as showers and thunderstorm begin organizing across the southern United States. By Saturday night our fast moving storm system will spread rain across much of the southeast and Mid-Atlantic as snow begins to breakout from Ohio to southern PA. As this happens late Saturday and Saturday night, our storm system will begin to rapidly strengthen as it exits the coast, producing a swath of moderate to heavy snow either just along I-95 or just to the northwest. This is where the forecast becomes unclear. Above we have two different models – The top model is the GFS (Global American Model) and the bottom is the NAM (Mesoscale American Model). There’s a solid 50-100 mile difference in the placement of the low pressure, with the…

The weather pattern will remain quite active for the Northwest and disturbances continue to slam into the region. The weather midweek will be no different with more rain and snow ahead. We’re tracking a quite potent upper-level disturbance that will take a southward dive from the Gulf of Alaska all the way into the Northwest US before stalling over the Southwest US. The weather on Tuesday will remain quiet across the region, although rain showers will likely sneak into northwestern Washington, including Seattle, by the evening. It’s not until overnight when the activity ramps up, as the disturbance plows in. A light to moderate rain will move southward into the Washington and Oregon coasts as the night progresses while heavy snow infiltrates much of the Cascades. Light snow will also be present in eastern Washington, northeast Oregon, the tip of Idaho, and the Bitterroots of Montana. This weather will persist…

We’re tracking yet another winter storm that is beginning to take shape, bringing rain, snow, sleet, and freezing rain–all four types of precipitation–this weekend. Two separate disturbances associated with the northern jet stream will combine with a surface low forming near the Gulf Coast. The result: a very messy weekend. In this article, we’re going to focus on the wintry precipitation associated with this storm. On Friday, one of the pieces of energy that will aid in the development of snow will move east from the Northwest. This energy will bring a light snow to portions of the Northern Plains and Northern Rockies. To be more specific, portions of Montana, Wyoming, South Dakota, and Nebraska. Then overnight, that light snow will expand to the east, impacting parts of Iowa, Missouri, and Illinois, including Chicago once again. The snow will also continue across much of Nebraska and the southern half of…

On the heels of the snowstorm that impacted portions of the Midwest region on Tuesday, another winter storm will move through Thursday into Friday as a new wave of energy associated with an active northern jet stream arrives. The impacts will begin Thursday morning where we look towards the Northwest and Northern Plains. From Montana into western portions of the Dakotas, a light to moderate snow is expected as it overspreads into these areas. It’s not until the latter half of the day when the storm will become more organized resulting in heavier snowfall rates. During the afternoon and evening on Thursday, snow is forecast to fall from northern Montana and portions of the Dakotas through southern Minnesota, northern Iowa, and into the Chicago area, including southern Wisconsin and northern Illinois. Chicago and areas to the west will be in the sweet spot with this storm. The reason is that’s…

We warned you about the major winter storm that will impact millions across portions of the Midwest and Northeast Tuesday night into Wednesday, and that forecast still holds. In this article, we have a final update on what you can expect from this multi-faceted storm, which will bring snow, freezing rain, and/or rain to a large area. During the overnight hours of Tuesday, a light area of snow will move through the Great Lakes region, including the Chicago area. To the south just north of the Ohio River from central Indiana through Ohio, several hours of heavy snow is likely. Meanwhile along the Ohio River, significant icing is possible. Some locations may exceed a tenth of inch of ice as hours of freezing rain comes down. This is due to freezing air at the surface while there is a thick layer of warm air aloft. This will allow for rain…

The new pattern we discussed last week seems to be holding itself nicely as we watch yet another storm system move into the region with heavy snow for the interior and a mixture of snow and ice for the coastline. Forming out west and moving eastbound, this winter storm will likely cause headaches for millions by the middle of this week. The major difference with this system compared to the last, seems to be the possibility of colder air holding on a bit longer, potentially expanding the region of snow and ice further towards the coastline on Wednesday morning. Our winter storm will begin moving out of the western states later tomorrow, producing snow to the north across parts of the Plains and spotty shower and thunderstorm activity to the south across nearly all the southern states. As the two separate areas of convection begin merging together overnight on Tuesday…