You can be certain that if the 3 eastern islands are using the southerly runways then something is up with the weather. Generally its nothing more than a dose of the Sahara dust being blown across the water, but this day shows the other 'extreme' of Canaries weather.
The approach the runway 21 is an offset VOR/DME with a slightly steeper slope than 3 degrees. It is made fairly close to the hills on the right hand side. The visual perspective is strange - the land slopes away from the aircraft at a similar angle to the approach. Our Company (after a minor incident) have decreed that this approach is to be flown by Captains only now.
Now that LPA has an ILS on runway 21R it certainly helps with the fuel planning - getting in there on a hazy day with an MDA in excess of 1000' and not too much petrol was always 'interesting'!