In December 2013, an error was discovered in the calculation of a lightning-based predictor
associated with the lightning and convection guidance. The error involved a small
discrepancy in the timing of the incorporated lightning strikes. A correction was
implemented Monday, December 23, 2013. This web page shows examples of the impact of this fix
on three cases. The images toggle back and forth between the original guidance and the guidance
which resulted after the error was fixed. The fixed images have "Bug Fixed" in the legend.