Starting September 8th, the ESTOFEX forecast maps indicate the probability of thunderstorms in more detail. By using two lines, areas with three different levels of probability are indicated.
Low probability: 0 - 15%
Medium probability: 15 - 50%
High probability: 50 - 100%
The probabilities refer to the chance of thunder within a distance of 40 km of a point. The areas are bounded by lines, that represent the 15% and 50% contours repectively. The 15% contour will be a thin yellow line and the 50% contour a thick yellow line. Verification results will be published as they become available.