Air carrier First Officer reported receiving a terrain alert while conducting a visual approach.

Narrative

I was pilot flying. We were told to make a steep descent and cleared for the visual approach Runway 20 trying to beat a storm. We had a bad intercept angle to capture the localizer and passed it. I turned off autopilot to further correct back onto the approach. At this time we got a terrain callout in the turn as we were leveling off at the altitude for the approach. We also got a landing gear callout. We visually verified we were not in danger of terrain; verified we were at the correct altitude; and lowered the landing gear. We were stable before 1;000 ft on the approach and landed safely.Cause: Trying to avoid and beat storms in the vicinity of the airport. Getting fixated on certain things while preparing for the approach causing us to lose situational awareness. Steep descent rates at low altitudes and bad intercept angles to intercept localizer. We could have decided to not take a steep descent onto the approach to try to beat a storm. We should have lowered the landing gear earlier and lessened the descent rate as we got closer to the approach.