Significant wx-charts new symbol
Hello together,
I found a new symbol on the significant wx-charts of Bracknell. Since a few days there are two numbers separated by a dash below the flight level of a jetstream combined with a CAT.
The FL of the jet is for example 310 and it says below -60/+90. One could think that this are the upper and lower border of the CAT, but this doesn´t match the limits of the CAT stated in the box in the upper left corner of the chart.
Any ideas or have I missed something everybody knows for ages?