GEMPAK Online Tutorial > GEMPAK Grid Programs
7.2 GEMPAK Grid Program Exercises!! (Scalar Values)
Enough with Hurricane Bob, lets go on to some realtime data!
- Use GDCNTR to plot 500mb heights for the most recent ETA run.
Try a Lambert Equal Area map projection with tangential point
at 45N, 100W. Use a GAREA centered at 33N, 90W with dlat=20 and
dlon=40. (Hint: A contour interval of 60m is standard in on 500mb maps).
Leave the window open when your finished, we'll keep using it.
- Now lets overlay 500mb absolute vorticity ontop of the 500mb map
we just plotted.
- OK. Now what if I want to mark the vorticity centers the old
fashioned way (X's for maximas, -'s for minimas.
- Thats a pretty archaic way to to try to see vorticity advection.
Now, let GEMPAK do the work for you. Plot advection of absolute
vorticity at 500mb. Color fill contours greater than 6x10e-9.
- All right, Whats next? Loop the vorticity advection plot
for the 0hr through 48 hour forecasts.
Well, that horse is pretty tired about now. Though we certainly
haven't beaten it to death.
Now lets try some vector plots!
GEMPAK Online Tutorial > GEMPAK Grid Programs
