The "Weather blood" is a new service activated by the Region of Tuscany CRS - Regional Blood Centre. This system allows you to self-evaluate, by the donor, the demand for blood in a particular group and decide, therefore, to go to donate independently in case of shortage or wait when stocks are stable in blood bank.
This is not an official, but stems from the request of a friend who is serving volunteer at the AVIS.
The system is low on parsing the Website, if they do occur any problems connecting, check that your phone is connected to the internet via wi-fi or 3g, and repeat the request data from the Reload menu item.