If you look in the pictures, you will see the onshore winds when they are pulling the car out.
Your comments conflict with police, media and rough weather the next day in the picture as they pull out the car.
Driving the car off the wall is the most logical and either way it really matters little when considering the other police reports.
That was, they dont believe Julie was in the car when it entered the water.
Julie reported a madman trying to run her off the road.
There were no other clothes in the car including the shoulder bag she often wore that police cannot locate.
Police believe Julie was murdered. Police believe Julie was not in the car.
My comments and metics (from her expert maps) are taken from bureau of meteorology weather reports and reported in the West Australian the day after in June 20 -22 1988. I have detailed notes and some images.
Sunday 19[SUP]th[/SUP] June 1988: Temp min 13.6 at 8.50 pm and max 20.6 at 11.45 am.
Monday 20[SUP]th[/SUP] June 1988: SW winds at 10 to 15 knots easing to 10 knots by late morning. Seas should be 1 m on a swell of 3 m.
Temp Min 10.7 degrees at 7.30 am and max 18.4 degrees at 2.25 pm. (Accurate for Monday 20[SUP]th[/SUP] June 1988, taken from Tuesday 21[SUP]st[/SUP] weather)
Tuesday 21[SUP]st[/SUP] June 1988 Forecast Perth fine and cool.
North East winds 5 to 12 knots. Seas should be 0.5 m on a swell to 2.5 m.
Temp: Min 10.6 degrees at 7.05 am and max 20 degrees at 1.35 pm
Extended forecast: With a high pressure cell establishing itself over the southern half, fine conditions should persist over the State until late tomorrow. A front should approach the coast tomorrow night and cross the lower west coast on Thursday.
Wednesday 22[SUP]nd[/SUP] June 1988 Forecast Fine. Outlook showers developing. Temp: Min 10.6 at 5.00 am and max 23.7 at 2.40 pm.
North East winds 8 to 10 knots. Seas should be 0.5 m on a swell to 2.5 m. Winds should be tending northerly during the day.
When the average see breeze in summer is 20 to 25 knots, these winds are hardly strong, and getting lighter every day. Swell and waves got increasingly lighter each day as well.
There was a high pressure system over Perth on the 20th June 1988, although in the lower SW of the State there were showers and strengthening NW winds.