Snow Watch 2011

28 Jul 2011 13:48 #3448 by lee

Replied by lee on topic Re: Snow Watch 2011

hi guys going up to the berg tomorrow wat would be my best bet for snow underberg or nottingham road?cheers Lee.

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lee
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28 Jul 2011 13:57 - 04 Aug 2011 06:59 #3450 by no4stopper

Replied by no4stopper on topic Re: Snow Watch 2011

jonwells0802 wrote: Just measured the band of snow on google earth (the yellow line) and its 656km long!

In a previous post it was mentioned that the cyan colour is the snow; if so why is it cyan out to sea which are obviously clouds. Is it related to temperature or relectivity, rather than "snow" vs "cloud"?

Last edit: 04 Aug 2011 06:59 by intrepid. Reason: fixed quote tag

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28 Jul 2011 14:04 #3451 by PeterHowells

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lee wrote: hi guys going up to the berg tomorrow wat would be my best bet for snow underberg or nottingham road?cheers Lee.

You will not find any snow around Notties - it had already melted yesterday. You could try going up to Highmoor in Kamberg (50km past Notties) - should still be snow in gullies and South facing slopes. I am not sure about the situation in Underberg although I'm sure there will still be snow in Garden Castle as it was really thick there.

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28 Jul 2011 15:13 #3452 by JonWells

Replied by JonWells on topic Re: Snow Watch 2011

Heres today's snow image. However there is some rain predicted tomorrow and yes some more light snow on the mountains!

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28 Jul 2011 18:50 #3453 by JonWells

Replied by JonWells on topic Re: Snow Watch 2011

@no4stopper : From what I understand its temperature based, so the very tops of some of the clouds also appear cyan.

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29 Jul 2011 06:30 #3454 by ShirleyKieran

Replied by ShirleyKieran on topic Re: Snow Watch 2011

so is the snow the light blue sections? i'm wanting to take my little one to see the snow today - am I wasting my time? whats the closest place to touch it from kzn?

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29 Jul 2011 07:13 #3455 by SeriousTribe2

Replied by SeriousTribe2 on topic Re: Snow Watch 2011

ShirleyK

Go to the bottom of the VE page, the grey block, and click on: Maloti-Drakensberg Satellite Images.

When the page loads click on the image appearing RED in colour. It will give you a better read on what is snow.

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29 Jul 2011 08:24 #3461 by JonWells

Replied by JonWells on topic Re: Snow Watch 2011

Yeah it may be hard to reach any decent snow in a car today. You may only find a few patches at best. Maybe phone Drakensberg Gardens Hotel and get some info from them.

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29 Jul 2011 09:45 #3462 by Sasquatch

Replied by Sasquatch on topic Re: Snow Watch 2011

The Aqua and Terra satellite images are in fact based on the reflectance of radiation from snow and ice, measured by the MODIS instrument. Snow has a high reflectance in MODIS bands 4,6 and 7, so the 'blue' and 'red' composites give a good indication of snow cover on the ground.

However, ice in high-altitude clouds may appear on these MODIS images, so a ratio of band 4 and 6 can be used to obtain a 'true' snow image, eliminating the reflectance of ice in clouds. Interestingly, there is a malfunction of the band 6 sensors on the Aqua satellite, which is why the 'red' 3-6-7 band composite is only available for MODIS on the Terra satellite.

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