Question

Skew-T diagram with single temperature and dewpoint

At 700 hPa, the temperature is 10°C and the dewpoint is 5°C.
What is the virtual temperature?

Step 1: Determine the mixing ratio in g/kg.
Enter your answer in the text box below, then click Done.

Mixing ratio = g/kg

Answer: The mixing ratio is 8 g/kg.
This is the value of the saturation mixing ratio line passing through the dewpoint.

Step 2: Compute the virtual temperature.
Enter your answer in the text box below, then click Done.

Virtual temperature = °C

Answer: The virtual temperature is 11.3°C.
The value is computed as follows:
Tv = T + (w / 6)
    = 10 + (8 / 6)
    = 10 + 1.3
    = 11.3°C
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