Understanding Precipitation Prediction Models
Understanding Long Range Prediction Models
Precipitation Prediction Model Maps
Temperature Prediction Model Maps
Long Range Prediction Models (Global)
Additional Prediction Model Maps
Thunderstorm Potential Index
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Thunderstorm Potential Index (K-Index / George’s Index)
The K-Index, also known as George’s Index, is a meteorological measure used to assess the potential for thunderstorm development for the current forecast period. Data from the Canadian Regional Deterministic Prediction System (RDPS).

Data updates 4 times daily: at approximately midnight, 6 a.m., noon, and 6 p.m. UTC.