Approaching the U.S.’s Thanksgiving holiday with heavy mountain snows to the West, slowing drivers through the Rockies. That’s the leading topic, but there’s a lot more to get to in this week’s Weather Watch. A significant arctic outbreak will arrive in the northern Rockies and Northern Plains on Thanksgiving into Friday and advance farther south and east through much of the Plains and Midwest this weekend. Dangerous wind chill temperatures are expected with a significant long duration lake effect snow event possible downwind of the Great Lakes. Severe thunderstorms may be possible in the Southeast. Heavy precipitation stretches across British Columbia and Alberta and freezing rain with snow squalls for Ontario and Quebec.
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The weather pattern remains active as we head through the final week of June. Severe thunderstorms and heavy rainfall will continue to impact parts of the Plains, Midwest, Ohio Valley, and Mid-Atlantic through the week, while dangerous heat remains locked in across portions of the South and expands eastward by early next week. Meanwhile, wildfire concerns are increasing across the Four Corners region, and a cooling trend is finally on the way for parts of the West this weekend. Residents in several regions should be prepared for rapidly changing weather conditions, including flash flooding, severe storms, and periods of dangerous heat.