I know most people are sick of the weather debate but think we need to get this correct. I think the big storm metic is talking about was from Friday 24th June which is the only time winds were NW as well, not 17 and 18th June. West and SW swells are protected by groyne and Rottnest Island. Normal sea breeze in summer is 20 to 25 knots, which is fairly strong.
Summary from the West Australian (detailed weather maps attached if interested)
Friday 17[SUP]th[/SUP] June 1988: Temp 16.1 at 10.10 pm and 21.5 at 11.30am
Saturday 18[SUP]th[/SUP] June 1988: Morning showers. Outlook fine. Temp 14 – 20. West to SW winds 15knots easing to 10 knots by late morning. Seas 1 m on a swell to 2.5 m.
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 10.7 degrees at 7.30 am and max 18.4 degrees at 2.25pm.
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 8 – 19 degrees.
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 10 – 20 degrees.
Fine and sunny conditions prevailed through the northern half, while the southern half experienced similar conditions at 4.00pm yesterday. A high pressure system was located over the Eucla and is presently bringing fine weather to almost the whole state. These conditions should persist except for the extreme SW corner where isolated showers are forecast. With clear skies and light winds inland areas should be in for another cold night with local frosts in the southern half. The seasonal fine weather should persist in the northern half.
Extended forecast.
The high pressure system should continue to move east and a cold front is expected to approach the west coast during tomorrow evening. This should bring a renewal of showers to the lower SW. The weakening front should pass through he SW land division on Friday.
Thursday 23[SUP]rd[/SUP] June 1988
Seasonal dry conditions continued in the northern half while fine weather prevailed in the south at 4.00 pm yesterday. Extended forecast: The high should continue to drift eastwards, allowing cold front to approach the SW today.
Friday 24[SUP]th[/SUP] June 1988: A low pressure system in the eastern Indian Ocean has continued to deepen. A frontal cloud band associated with this system has become well defined and is approaching the lower west coast. Strong NW winds precede the front and there are cold west and SW winds off shore behind a second front. The main frontal band should have moved slowly into the SW land division last night and today bringing rain and some thunder storms. Some rain should reach Eastern agricultural areas tomorrow night. The reminder of the state should be fine with above normal temperatures and gusty northerly winds to the east of the frontal region.
Extended forecast: Cold southerly winds are expected to spread into the SW of the state tomorrow night and Saturday behind the fronts. The low pressure system and its fronts, should weaken rapidly in the latter part of the weekend, and a new high pressure ridge should develop fairly rapidly over the SW on Sunday.
North West winds at 20 to 30 knots becoming westerly at 15 to 22 knots. Seas should be 2.5 m on a swell of 3 m.