Earlier I said Clippers are often hard to forecast. Ive gotten two questions on what that is so..... For starters, they are often moisture starved. Because they dont normally have a lot of moisture, the precipitation shield is very narrow.... with a sharp cutoff on the southern side of the Clipper. Another factor is that they are usually very quick moving systems. Normally a clipper will bring 1-4 inches of snow. But sometimes a clipper can over produce. Depending on the Track, lake effect snow can substantially increase snowfall totals if the flow is just right. Now if the clipper runs into some moisture it can increase snowfall amounts; The same thing with upstream blocking, it can slow down the storm, making for a longer duration storm. Sometimes you can get heavy banding.....Snow bands can be aided by a favorable jet streak overhead, which can provide favorable uplift...now if you can get the bands to develop along a boundary....You can get snowfall amounts of 4-5 inches per hour....out of a Clipper. So when a clipper is coming through, you want it to pass a little to your south...so that you will see the most snow possible.
Posted on: Tue, 20 Jan 2015 05:01:18 +0000
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