Several Straight Days of Gloom Set to Bring Plenty of Rain - KMSP-TV

Several Straight Days of Gloom Set to Bring Plenty of Rain

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A HUGE low pressure system is expected to cross over the Rockies and into the Plains on Sunday and will bring with it plenty of rain and wind.  This low will then make a very SLOW trek across the middle of the country before exiting North America next weekend.  This storm isn’t exactly unprecedented, but it is a little more uncommon for this large of a storm to just get stuck in the middle of the country for so long.  This will provide soaking rains from Montana and Wyoming eastward through the Mississippi River Valley and into the East Coast.  Check out the rainfall forecast for the next week from the Weather Prediction Center…




















No need to squint, you are seeing this correctly.  Parts of our area could get over 3 inches of rain… meanwhile some spots across the country could get 5 inches… with widespread common totals in the 1-3 inch category.

Not only will the scattered rain showers be around for a while, but when it isn’t raining, it doesn’t look like the sun will come out…. At all.  The picture below is a forecast sounding from a program called Bufkit.  I have showed something like this before, but to give you a quick refresher course… this program takes data from the computer forecasting models and plugs it into a timeline and charted format based off of time and altitude.  We are then able to see what the computer forecasting models predict at all levels of the atmosphere showing us almost anything we want to know.




















Let me point a few things out so you can read this.  First, the time of day is on the bottom, listed in 12 hour increments… notice that they go from right to left, so it’s backwards from normal reading.  Next, the dotted and solid white lines running from right to left across the picture are your elevation lines.  The dotted indicate a thousand foot jump in elevation and the white indicate a five thousand foot jump in elevation.  The actually numerical elevation key is on the right labeled in white and going from bottom to top, like going from the surface to the top of the atmosphere.  Remember that the surface is the gray line at the bottom of the picture immediately above the 12 hour time increments.  Now, I have turned on the component that shows relative humidity… this is why there are purple and green colored lines all over the image.  We look at this because the higher the relative humidity is, the better chances of having cloud cover.  The green lines indicate that the relative humidity is somewhere between 70-90%, which means that cloud cover is possible.  The purple lines indicate that relative humidity levels are above 90% which indicates that cloud cover in that area of the atmosphere is likely.  Well, you see a lot of areas covered in purple right?  The purple shade starts sometime Saturday night and goes right through next Saturday morning… meaning that if this model is correct, and there is this much moisture in the atmosphere… we may not see the sun again until next weekend! WHOA! Let’s put it this way… it’s been a long time since I have seen a forecast sounding look like this.  Get ready for the gloom!

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