Stüves for Selected Cities
Stüve diagram for Topeka, Kansas (TOP) depicting temperature, dewpoint,
and winds at various levels.
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:
- Temperature sounding data - black jagged line to right.
- Dewpoint sounding data - black jagged line to left.
- Temperature lines - vertical blue lines, in degrees Celsius.
- Pressure lines - horizontal blue lines, in millibars.
- 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.
- 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.
- Mixing ratio lines - dashed yellow lines which represent the
saturation moisture content of the atmosphere.
- 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.