Many of the features are being developed and improved on a daily basis. Things may not work properly or some features may not be available, and we apologize for any inconvenience this may cause. Feel free to email WX8DX Online and give us your opinions on the work thus far. Numbers -4 or lower indicate the likelihood of severe storms. Theta-E Another instability tool.
Ridges indicate unstable air.
K-Index Indicator of the probability of thunderstorms. A good indicator of Air Mass thunderstorms. Derived from the Skew-T upper air soundings. Values of 400 or greater imply tornado potential. Values rarely reach a level of 800.