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You may have seen in the news that a Sudden Stratospheric Warming (SSW) event is occurring - what does that mean, and what are the potential impacts for North Dakota? A thread (1/9):
#NDwx
#NDwx
The stratosphere is the layer of the atmosphere extending from ~6 miles to ~31 miles above the Earth’s surface. The stratospheric polar vortex (we bet you've heard of the polar vortex!) resides in this area, and can significantly influence weather in the mid-latitudes. (2/9) 
Note: the stratospheric polar vortex and tropospheric vortex are two different things. The tropospheric polar vortex is a normal atmospheric feature that affects our weather every winter. For the remainder of the thread, we'll focus on the stratospheric one. (3/9)
