If both cold air masses would have the same temperature, they would combine without causing an effect.
Hope it helped!
ok, well assuming they had similar humidities,two similar air masses would just simply mix with no sensible effects caused by the mixing...
When two cold air masses with the same temperature meet, they create a stationary front, leading to stable and cloudy weather conditions. There is generally no significant movement between the air masses due to their equal temperature. Prolonged periods of similar weather and potential precipitation can occur until external conditions change.
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