[Rasp] RASP Beta Inaccuracy vs old RASP 1.3 and 4km Res models

[Ria Moothilal]

Hi

I'm giving feedback as requested. Today, the RASP Beta was wrong again, and
interestingly, the old RASP 4km model was more accurate.  Below are the
forecasts for today, the 5th July at 11 am, as well as the actuals for
Signal Hill taken by 3 live weather stations. Both the 1.3km and 4km old
RASP models show that the north-west wind slows down before it reaches
Signal Hill / Table Mountain. The RASP Beta 2km does not. This suggests
that it's not just a resolution difference on the RASP Beta, but also
either a source data or model parameter change that has taken place. The
old RASP was accurate when compared to actuals, but the RASP Beta was
completely wrong

The old RASP was the most accurate weather forecast for the Western Cape.
Nothing came close. I think it would be sensible to merely recreate these
same models on the new user interface

1. RASP Beta 2km
[image: image.png]

2. Old RASP 4km
[image: image.png]
3. Old RASP 1.3km
[image: image.png]
4. Actuals from weather stations at Signal Hill and Sea Point:
[image: image.png]

Ria Moothilal
Chief Flight Instructor
+27 78 095 8136
www.airschool.co.za
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.zsd.co.za/pipermail/rasp/attachments/20250705/894ad47c/attachment.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image.png
Type: image/png
Size: 526716 bytes
Desc: not available
URL: <http://lists.zsd.co.za/pipermail/rasp/attachments/20250705/894ad47c/attachment.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image.png
Type: image/png
Size: 38195 bytes
Desc: not available
URL: <http://lists.zsd.co.za/pipermail/rasp/attachments/20250705/894ad47c/attachment-0001.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image.png
Type: image/png
Size: 415633 bytes
Desc: not available
URL: <http://lists.zsd.co.za/pipermail/rasp/attachments/20250705/894ad47c/attachment-0002.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image.png
Type: image/png
Size: 539749 bytes
Desc: not available
URL: <http://lists.zsd.co.za/pipermail/rasp/attachments/20250705/894ad47c/attachment-0003.png>