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This slide shows the progression of false thunderstorm (TS) hours forecasted in the Terminal Aerodrome Forecast (TAF) for O'Hare (ORD) and Midway (MDW) airports combined. It highlights a general decline in false hours from 2001 to 2004, with a significant drop in the second forecast period (12-24 hours) when comparing 2004 to previous years. This trend suggests improvements in forecasting accuracy and a better understanding of weather patterns over the studied period.
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This slide shows the amount of false thunderstorm (TS) hours forecast in the Terminal Aerodrome Forecast (TAF) for ORD and MDW combined. Notice the decline in false hours from 2001 to 2004 in general. Also, the dramatic drop in false hours in the second (12-24 hour) part of the forecast comparing 2004 to the preceding years.