Why Won’t The Rain Stop? The Cut-Off Low - KMSP-TV

Why Won’t The Rain Stop? The Cut-Off Low

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Meteorologist Steve Frazier Meteorologist Steve Frazier
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A lot of you are most likely tired of the excuses and just want the taps to turn off.  The rain that has plagued us for days still has a few days to go. So why is it raining so much and when can we expect it to stop? The answer is simple, our storm got off the main highway, is now lost and refuses to ask for directions. Well, kind of.

The steering current for our storm systems is usually the jet stream. This river of air aloft is the main highway for storm systems. This week, the jet stream is pretty wide and as a result a broad area of low pressure has developed, broad enough to break off from the jet and spin on its own. Here is the current set up with our slow low.



Until the jetstream changes, we can expect little movement in this pesky storm. In fact, if you follow the jet stream, you can see that this low may even back up a bit as it slowly heads to the northeast. Here is the jet stream map for Tuesday April 30th.



Now there is hope on the horizon. Below is a map of the jet stream position on Thursday, courtesy of the 300 MB map, the chart we use to plot the jet stream winds.

 

The low and jet stream are outlined in red. You can see the low is much farther off to the northeast, but unfortunately, until it gets any farther away, the clouds and showers will linger. The good news is that more sun and warmer temperatures are just on the other side of that jet and moving in our direction. Hang in there, there is hope on the horizon.

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