This work is dedicated to the memory of the eminent Russian health resort expert professor Ivan Ivanovich Grigoriev (1915—2002), the founder of the scientific school of meteoprophylaxis who created the organizational and methodological basis for weather forecasting with the medical implications. Ivan Ivanovich Grigoriev has made a great contribution to the research designed to elucidate the influence of the weather factors on the human body. Moreover, he was a prominent organizer of the health resort business in this country paying especially much attention to the construction of spa and health resort facilities and their therapeutic zonation. He did a lot to substantiate the necessity of spa and health resort-based treatment for the country’s population and to develop indications and contraindications for such therapy including the identification of the groups of adult subjects and children who are at an especially high risk of suffering from various diseases.