Stüves for Selected Cities

Stüves for Selected Cities

Stüve diagram for Topeka, Kansas (TOP) depicting temperature, dewpoint, and winds at various levels.

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Rawinsonde upper air soundings ("profiles") for individual stations can be plotted on one particular type of upper air diagram called a Stüve diagram. The Stüve heading is the year, month, date / hour (YYMMDD/HHHH UTC), World Meteorological Organization station identifier number, and 3-letter station code.
   Additional information includes: the lifting condensation pressure level in millibars (LCLP), lifted index level in Celsius degrees (LIFT), and the "total totals" value (TOTL). These values provide information on atmospheric stability.

A Stüve diagram with sounding data contains:

  1. Temperature sounding data - black jagged line to right.
  2. Dewpoint sounding data - black jagged line to left.
  3. Temperature lines - vertical blue lines, in degrees Celsius.
  4. Pressure lines - horizontal blue lines, in millibars.
  5. Dry adiabats (potential temperature lines) - solid green lines sloping towards the upper left. They are lines depicting the temperature change of unsaturated air parcels when ascending or descending.
  6. Moist adiabats - dashed cyan lines sloping curves toward the upper left. They represent the temperature change of saturated air parcels when ascending and releasing latent heat.
  7. Mixing ratio lines - dashed yellow lines which represent the saturation moisture content of the atmosphere.
  8. Wind barbs - to the right of the diagram, representing winds in station model format at altitudes indicated by the point of the wind barb. The top of the diagram represents north for wind direction. The winds at mandatory pressure reporting levels are plotted at their pressure levels, whereas winds at various height levels are plotted at their Standard Atmosphere pressure level.

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