Meteorology 2
AIR18
AVS3201_Hodograph_Assignment_Spring2020.docxAVS 3201 Hodograph Assignment
Spring 2020
Read through the Lecture AVS3201_HODOGRAPHS_AUG2019
Also Read “Hodograph Basics” in Practical Meteorology (section 14.5.1) on pages 510 through 513.
Also Read “Advanced Topic: Hodographs” in Severe and Hazardous Weather (page 30).
The basic method of plotting the hodograph is two steps:
· Plot the tip of each wind vector as a dot.
Additionally, label each dot with a value indicating the pressure.
You will use the data handed out to you in class plot the data on your Hodograph sheet handed out in class. You only need to focus on the DRCT (wind direction) and SKNT (wind speed) columns for plotting the hodograph points. Use the PRES (pressure) column to label each point. Using knots for the wind speed is fine. Plot and label the points, then connect the dots!
Your data looks similar to this:
-----------------------------------------------------------------------------
PRES HGHT TEMP DWPT RELH MIXR DRCT SKNT THTA THTE THTV
hPa m C C % g/kg deg knot K K K
-----------------------------------------------------------------------------
980.0 178 23.8 18.8 74 14.14 190 9 298.7 340.0 301.2
965.0 312 22.6 16.6 69 12.46 196 13 298.8 335.3 301.0
932.2 610 19.8 15.1 74 11.73 210 21 298.9 333.4 301.0
925.0 677 19.2 14.8 76 11.57 210 23 298.9 332.9 301.0
899.8 914 17.3 13.7 79 11.05 215 30 299.4 331.9 301.4
898.0 931 17.2 13.6 79 11.01 216 31 299.4 331.9 301.4
868.2 1219 15.5 11.0 75 9.59 230 41 300.5 329.0 302.3
850.0 1399 14.4 9.4 72 8.78 235 42 301.2 327.4 302.8
Etc.
But don’t plot all the data! Plot the levels that are the closest to these pressure levels:
1000.0 mb
925.0 mb
875.0 mb
850.0 mb
825.0 mb
800.0 mb
750.0 mb
700.0 mb
650.0 mb
600.0 mb
550.0 mb
500.0 mb
400.0 mb
