Rumbling noise from front at very low speed. on 2001 Volvo S40

after a cold start, I hear a rumbling/crackling noise from the left front of the car when the car is moving very slowly (5mph when I don't press the gas and slowly moving forward). I do not hear any noise when going over 10 mph. After the car warms up the noise goes away. Other than that the car runs fine. Could it be a bearing problem.

Asked by for the 2001 Volvo S40
have frt wheel bearings ck'd
Thank you for your reponse.