Demand for thermal coal has been boosted after a severe winter in the US, a dip in inventory levels at utilities and a hike in natural gas prices.
Consol raised its annual outlook to 31-33 million tons from 30.1-32.1Mt.
However, the company said that demand for metallurgical coal remained weak, especially across Asia.
The company believes it may soon have to exert additional production discipline at its Buchanan mine in Virginia.
Consol Energy shares closed at $US39.74 ($AU42.83) overnight.