Weather Maps, Weather Features, and Soundings

Due at beginning of class on Friday 17 February 2017

Examine the 500 mb chart, 700 mb chart and surface plot for 12 UTC 5 April 2011.

  1. On the surface plot, put the correct symbols/lettering for the four pressure systems indicated, and the correct frontal symbol for the front indicated on the East Coast with the solid black line. Answer.
  2. On the 500 mb chart, the lines indicated are either ridges or troughs. Annotate the chart correctly. Answer

  3. Here is the sounding for Cape Hatteras, North Carolina at 12 UTC 5 April 2011. Determine the following from the sounding for the surface, 700 mb and 500 mb levels: temperature, dew point, wind direction and wind speed.

      Temperature (C) Dew Point Temperature (C)

    Wind Direction (Compass)

    Wind Speed (knots)

    500 mb -13.9 -20.9 225 68
    700 mb 2.8 -8.2 230 63
    Surface 19.6 (68F) (Map=69F) 19.1(66F) (Map=63F) 180
    (Map=20 kts)

  4. Compare and contrast the information you obtained in (3) above with the same information plotted on the surface, 700 mb, and 500 mb charts, linked to at the top of the homework.

    [Hint: this is meant to be a somewhat trivial exercise in stating the obvious, but that "obvious" has to be backed by examination of actual data. Also, please note that the surface weather station at Cape Hatteras is not quite in the same location as the sounding site. This should be at least one paragraph]

    With the exception of the surface observation (from a different location) the observations are identical, since the information from the sounding determines the information plotted on the charts.