Rain and storm for Cpt

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Sinbad said:
Stellenbosch airfield apparently saw a gust of 303km/h and sustained winds of 145km/h

Moer.
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That same weather station also reported 340mm of rain in 24 hours all whilst areas of Stellenbosch were burning to a crisp...

Sense it doesn't make, so I don't trust those wind figures..
 
Gordon_R said:
I don't believe 199km/h either. The highest gust on SAEON Dwarsberg was 115km/h, and this is a properly calibrated anemometer.
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Going to agree with you there on this. Around 140km/h or less is what I can imagine on an extreme windy day in the Cape
 
WAslayer said:
That same weather station also reported 340mm of rain in 24 hours all whilst areas of Stellenbosch were burning to a crisp...

Sense it doesn't make, so I don't trust those wind figures..
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Oh yes well spotted, I remember yesterday seeing that and thought no ways is it raining in the Western Cape on Sunday , maybe a little black south easter here and there but there was no rain reported that I could find on Google
 
UB40 said:
Oh yes well spotted, I remember yesterday seeing that and thought no ways is it raining in the Western Cape on Sunday , maybe a little black south easter here and there but there was no rain reported that I could find on Google
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at 300km/h, that may well have been 340mm of atlantic water, not rain :D
 
when I arrived early Sunday morning to move my gyrocopter to another hanger the wind was so strong we were walking into wind at 45 degrees! reminded me of the black south easter along the foreshore back when the Cape lived up to it's name "CAPE OF STORMS" and of course the wind used to blow the mini skirts sky high :)


just remember there is a huge difference between "gusting" and sustained wind speeds. aviation wx reports will always give wind speed / direction / gusting among other vital info.
The fundamental difference between the two is duration. A sustained wind is defined as the average wind speed over two minutes. A sudden burst in wind speed is called the wind gusts and typically lasts under 20 seconds.
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WAslayer said:
Been 6 years since a thunderstorm woke me up.. 6 years ago was a massive lightning strike 100 meters from our flat building.. few minutes ago was an absolute beast of thunder here in Kuilsriver..
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Ja, that was the loudest thunder ever with no gap between the lightning and thunder.

It sounded like a bomb going off.
 
Gordon_R said:
Persistent moderate rain in Kenilworth this morning. Predicted to last most of the day. Cumulative totals could be quite large.

SAEON Dwarsberg (Jonkershoek mountain catchment) recorded an impressive 98mm up to midnight!

Edit: Maximum wind gust was 32m/s (115km/h)!

Edit: A bit quieter in Kenilworth now. Only 20mm in our rain gauge, but it is not positioned for winds coming from the SE direction.
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SAEON Dwarsberg recorded another 75mm up to midnight, making a total of 174mm in 48 hours. Wind speeds dropped off considerably during yesterday (maximum gust 74km/h).

Edit: Only 11mm in our gauge in Kenilworth (not optimally positioned).

Today looks mostly dry, though it will be a while before temperatures reach the mid 20s again...

Edit: Heavy rain is still likely over parts of the Garden Route today (Tues 9th) as the cutoff-low slowly moves eastwards.
 
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Off topic for this thread, tuff.

The family on the farm in the Hanover district have just had a lesson in the power of nature.
Last week the farm dam close to them was ankle-deep at its deepest point (50 m below the top of the wall). They have had an almost continuous drought for 8 years.

On Monday at 08:20 that dam was 300 mm below overflowing. At 10:02, the dam started overflowing. By 17:00, the wall was no longer visible with just a sheet of water flowing over the top. The road below the dam goes over a low-level bridge as the stream is normally only about 1 meter wide. That road was completely flooded with that stream now about 800m wide, just a sheet of water. All the roads to the farm were cut off (3). The water has now started to subside. The one road was barely passable yesterday morning by a tractor/bakkie. The other 2 roads below the dam wall are expected to stay blocked well into next week.

They measured more than 120 mm of rain in less than 48 hours.
 
Geoff.D said:
Off topic for this thread, tuff.

The family on the farm in the Hanover district have just had a lesson in the power of nature.
Last week the farm dam close to them was ankle-deep at its deepest point (50 m below the top of the wall). They have had an almost continuous drought for 8 years.

On Monday at 08:20 that dam was 300 mm below overflowing. At 10:02, the dam started overflowing. By 17:00, the wall was no longer visible with just a sheet of water flowing over the top. The road below the dam goes over a low-level bridge as the stream is normally only about 1 meter wide. That road was completely flooded with that stream now about 800m wide, just a sheet of water. All the roads to the farm were cut off (3). The water has now started to subside. The one road was barely passable yesterday morning by a tractor/bakkie. The other 2 roads below the dam wall are expected to stay blocked well into next week.

They measured more than 120 mm of rain in less than 48 hours.
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That's enormous, what kind of dam is that, municipal?
 
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