Steve
(Senior Storm Chaser)
Thu Sep 19 2002 07:28 PM
Let's take a look at the overall movements since 11pm last night

03 GMT 09/19/02 19.7N 79.5W
09 GMT 09/19/02 20.0N 80.8W
15 GMT 09/19/02 20.0N 81.2W
18 GMT 09/19/02 20.3N 81.7W (intermediate)

The overall movement of the storm has been .6 North and 2.2 West. That returns a slope of 3/11 - in other words, for every 3 tenths of a degree it moves north, it's going 1.1 degrees west. WNW would be 1/2 (or 2/1 if you look at it as 11/3 which I think is actually the right way to do it). Using old LCD pre-algebra, the difference becomes 6/3 vs. 11/3. That tells me the storm overall has been heading much closer to west than nw. W is 270 degrees on the compass. NW is 315. WNW is 292.5 degrees, then this storm is heading somewhere between 270-280. I can't for the life of me remember how to do cross multiplication - someone post the formula ACK, but anyway, we've had a W-WNW moving storm today. Models will change again at 18z.

Steve


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