Question[s] #3
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After figuring out our regression and solving our previous issue, we are getting very negative values for geopotential 
height (like greater than 1000 m below the surface). These kinds of heights would correspond to very low surface 
pressures, so we don't think this is very accurate. We're confused because we used Project 9 values to create the 
regression, but those values are an order of magnitude lower than the GRVT values we calculated for the boat project, 
so why are we getting unreasonable heights? Are they even unreasonable?

Answer to #3
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You are correct in being concerned about large negative geopotential height values (you can look at last year's results
which can help serve as a sanity check). You can come up with a realistic new value of GRV (based on your dGRV/dt) at the
1000 hPa cyclone center and recall the relationship between GRV and geopotential height that we learned in our kinematics 
and dynamics review. This relationship can give you a more realistic change in geopotential height for a given GRV value. 
We also talked about this relationship in the board notes while going through lecture packet #6.