Hmmm....Eddie you could cery well be correct. I do know that the weather was quite warm at the beginning of the week as we used the air conditioning in our hotel--Hotel Becquer on calle Reyes Catolicos--quite nice. (I was living and studying abroad and my husband and I were doing a really long-distance commuter marriage. I was boarding with a widow and her two teenage daughters. We took a hotel when my husband came to visit.)
And I know that on Good Friday and Holy Saturday we ate outside at the terrazos on Calle Betis in the Triana area. So, it could be that it was really hot. Having lived in southern Spain for quite awhile, I don't tend to notice the weather until it is over 100 F.
However, I know I have pictures of me on Holy Thursday (the night before you mention) and I am wearing a short skirt, short sleeved shirt and light sweater. I do remember the light rain that year and that quite a few processions weren't able to go (because of possible damage to the statues and floats). I am pretty certain that one which didn't go was one of the most famous-- El Estudiente from the University of Seville. I was particularly interested in that one because friends from the university were penitentes in that cofradía.
Neat to know that we were there at the same time. Lucky you being retired. My last day at work (in about 12 years) is the same day we will be moving back to Spain.
Here is a link to a site that explains in English all the stages/particpants in a procession:
Sol.com There used to be a great Spanish site (at least to my obsessive-compulive mind) that listed each brotherhood, its history, color of garments and tons of details. I thought I had it bookmarked. If I can find it, I will post it again.
Other important processions to see are El Silencio, Jesus del Gran Poder and of course, La Macarena & La Esperanza de Triana as already mentioned. Some processions are loud and boisterous and the crowd shouts out compliments to the Virgin and others process in silence and are very moving.
Donna