No, stop is present tense. The past perfect tense is had stopped.
There is no verb in the past perfect tense in that sentence. The past perfect tense of stop is had stopped. Stopped is the past tense.
The past tense of stop is stopped. The present tense of stop is stop.
Had stopped
had toldhad + past participleI had told him before to stop kicking the ball.
The past perfect tense for "stop" is "had stopped."
The past perfect tense of "stop" in the given sentence would be: "The storm had stopped in the early afternoon."
Stopped is the past tense for the verb "stop"
Stop is neither future tense nor past tense. It's present tense. The future tense is will stop, and the past tense is stopped.
The storm had stopped by early afternoon.
Past tense - stopped. Present tense - I stop - He/she/it stops Future tense - will stop, going to stop, am/is/are stopping.
Stopped is the past tense for the verb "stop"