Question[s] #6
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We are really struggling with calculating the wind. We tried to make the assumption that the geopotential height at the 
ship was 0 m and got unreasonable wind values, so we adjusted to 155 m at the ship and still got unreasonable wind values. 
Are we making the right kind of assumption (choosing a constant gpt ht for the ship's location) or do we need to make a 
different kind of assumption?

Answer to #6
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The best way to visualize what must happen would be to look at last year's case study (via GARP) and Results slides 
posted on last year's final project ATMS 410 web page [GFS thinned init at 0000 UTC 22 January 2018 (F00, P1) through
1800 UTC 23 January 2018 (F42, P8)]. As we have learned this semester, if 1000 hPa GRV at the storm center is changing, 
then the geo ht at the storm center is changing. The geo ht values posted on the Results slides (in boldface font) are 
those found at the storm center from P1 through P8. If you look at the zone of winds exceeding 15 m/s with last year's
case study, you can assume a similar evolution in this storm if the cyclone is deepening through P1 - P8, although the
zone of winds greater than 15 m/s might have a different radius. The previous email response (#5) suggested one 
reasonable assumption you could make. It is unreasonable to assume the 1000 geo ht at the ship is constant since it is 
moving relative to the 1000 hPa storm center...if closer to the storm, then geo ht is lower, if farther from the storm, 
geo ht is higher.