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The date is October 11, 1997. The Aggies are in the process of defeating Iowa State. But my thoughts turn to the forecast for Jackson, Mississippi (JAN). For starters, I'd like to get oriented. How's the overall weather going to evolve? So I check the 12-48 hour NAM (known as the Eta at the time) model forecast.
This image consists of a four-panel map showing surface pressure and 1000-500 mb thickness (to be explained later) at 12, 24, 36, and 48 hours past the model initialization time, which is normally 12Z. So the 12-hour forecast is for this evening, the next two are during the forecast period, and the last one is after the end of the period. Click on the forecast map, and decide for yourself what's going on in the central United States before continuing.
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