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Bernard W. Magor

The tornado forecast becomes a small-scale problem as the tornado-generating severe-thunderstorm area approaches a particular locality. Consequently, much of this problem can be solved by the best possible analysis of surface synoptic weather data. Various tornado occurrences were investigated and found to be associated with meso-lows. These meso-lows were depicted either by the intersection of two instability lines or by the intersection of a squall line with a northeastern boundary of rain-cooled air. An explanation is given for the formation of tornadoes along this intersection.

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A meso-Low was followed through a 14-hour period over a track about 600 miles in length. This Low was associated with severe storms along its route and subsequently became coincident with the vortex of a well-documented severe storm at Charleston, S. C. on January 18, 1955. The objective is to show that such Lows can sometimes be tracked with the present observational network and to point out some of the interesting meteorological features of this type of analysis, along with forecasting implications.

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