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Large-Scale Meteorological Conditions Associated with Midlatitude, Mesoscale Convective Complexes

Large-Scale Meteorological Conditions Associated with Midlatitude, Mesoscale Convective Complexes paper by Robert A. Maddox published July 1983 presentation by Stephen Healey.

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Large-Scale Meteorological Conditions Associated with Midlatitude, Mesoscale Convective Complexes

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  1. Large-Scale Meteorological Conditions Associated with Midlatitude, Mesoscale Convective Complexes paper by Robert A. Maddox published July 1983 presentation by Stephen Healey

  2. -- Mesoscale Convective Complexes are frequent occurrences over the midlatitudes of the United States. They are often nocturnal. -- Fritsch et al. (1981) showed how these MCCs produce a significant portion of growing-season rainfall over the corn and wheat belts of the central United States. -- Maddox (1980a) defined these systems further. http://www.ucar.edu/communications/staffnotes/9804/mcc.gif

  3. Definition of an MCC Size: A. Cloud shield with IR temperature < -32 C, area > 100,000 km2 B. Their interior cold cloud region, temp < -52 C, area > 50,000km2 They initiate when size definitions A and B are first satisfied These size definitions must be met for a period > 6 hours They reach their maximum extent when size definition A reaches its maximum size. At the time of maximum extent, their eccentricity is > 0.7. They terminate when definitions A and B are no longer satisfied. Note: All >’s above stand for greater than or equal to. Maddox (1980a), referenced in Maddox (1983) 1476, Table 1

  4. Scientific Procedure Data was collected for three consecutive data times (0000, 1200, 2400 GMT), hopefully in the span of the lifecycle of the MCCs. This data collected was then converted into a common grid, with the MCC located at the origin of the coordinate plane, starting with 0000 GMT. Over each of the following observation periods, the center of the coordinate system moved relative to the system itself.

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