Notable Weather Events Page 6

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Wind Change 12th September 2002

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An evening change of wind direction brings a moment of calm, before the return to previous conditions

Thunderstorm Radar Loop 24th September 2002.

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Unexpected Thunderstorm A rather quiet and nondescript evening bought a rather pleasant surprise!

Click for a radar loop of the event..........

Dry and Windy 18th October 2002. 

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Dry, windy change This day saw strong winds and combined with warm temps and dry conditions saw raised dust over much of the agricultural areas. The gust of 90 km/h was one of the stronger gusts recorded that day.

Low Barometer 22nd October 2002

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Yet another windy change Quite a fierce day of winds again. Maximum gust of 116.4km/h with sustained gusts above 50-60km/h for a number of hours. What is clear in the image below is the rapid drop of barometric pressure (lowest 995.45 hpa) together with the strong winds heralding the approach of the change which when arriving bought a rapid drop in winds, rapid rise in humidity and a rise in the barometric pressure. Not much rain however and another day of raised dust.

Thunderstorm 2nd November 2002.  3:00am

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A very warm night fuelled a line of thunderstorms across SA. The official blurbs reported over 40,000 lightning strikes from the system. Its impact on my local environment was substantial as can be seen from the image below.

Thunderstorm(s)! 25th November 2002.  6:30pm

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Click here for a Radar Loop of the event (1.02mb)

Radar image of the Squall Line

The day started foggy, with surface winds from the south, but upper air movements associated with a deepening low from the northwest. After a morning and mid afternoon of gentle but persistent rains, the fog lifted, the rain stopped and the sun came out. Immediately the temp rose and the humidity stayed at a high 97% even though the fog had cleared. Large cells started to rapidly build over Mt Lofty and quickly formed into Towering CB's with the first rain falling over Hahndorf and surrounds. The next 10 minutes saw a very impressive squall line form (see radar image below) and move in from the NW.  The BOM also had noticed the approach BUREAU OF METEOROLOGY SOUTH AUSTRALIAN REGIONAL OFFICE SEVERE THUNDERSTORM WARNING For the GREATER ADELAIDE AND MT LOFTY RANGES DISTRICT Issued at 6:35 pm on Monday, 25 November 2002 A line of strong thunderstorms with severe winds, very heavy rain and large hail is expected to affect the Adelaide metropolitan area from 6:45 pm. Localised damage and flash flooding is likely. The State Emergency Service advises people to secure loose outside objects and move vehicles under cover, then stay indoors until the thunderstorms have passed.   Top Rainfall recording for the day: PARAWA WEST  69mm!! Yep, quite an afternoon indeed!!! Some more pics below taken from the front lawn.

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