Editorial Type:
Article
Article Type:
Research Article

Synoptic-Scale Features Associated with Warm Season Heavy Rainfall over the Interior Southeastern United States

Charles E. Konrad II Department of Geography, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina

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Print Publication:
01 Sep 1997
DOI:
https://doi.org/10.1175/1520-0434(1997)012<0557:SSFAWW>2.0.CO;2
Page(s):
557–571
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Abstract

Previous research has established links between heavy rainfall and a wide variety of synoptic features and parameters. In this study, 312 heavy rainfall events are identified over the southeastern United States and used to construct a synoptic climatology that relates 14 synoptic features and parameters to the occurrence and amounts of heavy rainfall. To carry this out, an automated synoptic typing scheme is employed to classify the heavy rainfall sample according to several characteristics of the synoptic regime. This classification provides five distinct synoptic patterns that can be associated with heavy rainfall over the southeastern United States. Commonly occurring synoptic features in each synoptic pattern are highlighted and discussed. Correlation analysis is then used to relate the occurrence and strength of these features to the heavy precipitation totals.

Heavy rainfall in four out of the five identified synoptic patterns is most frequently associated with high levels of moisture at the 700-mb level. Ridging in the 850-mb warm air advection field is common over the heavy rain area as well. Numerous relationships are identified between the heavy rainfall amounts and the character of synoptic features; however, the nature of these relationships is found to vary strongly according to the synoptic pattern.

Corresponding author address: Dr. Charles E. Konrad II, Department of Geography, University of North Carolina at Chapel Hill, 203 Saunders Hall, CB3220, Chapel Hill, NC 27599-3220.

Email: konrad@geog.unc.edu

Abstract

Previous research has established links between heavy rainfall and a wide variety of synoptic features and parameters. In this study, 312 heavy rainfall events are identified over the southeastern United States and used to construct a synoptic climatology that relates 14 synoptic features and parameters to the occurrence and amounts of heavy rainfall. To carry this out, an automated synoptic typing scheme is employed to classify the heavy rainfall sample according to several characteristics of the synoptic regime. This classification provides five distinct synoptic patterns that can be associated with heavy rainfall over the southeastern United States. Commonly occurring synoptic features in each synoptic pattern are highlighted and discussed. Correlation analysis is then used to relate the occurrence and strength of these features to the heavy precipitation totals.

Heavy rainfall in four out of the five identified synoptic patterns is most frequently associated with high levels of moisture at the 700-mb level. Ridging in the 850-mb warm air advection field is common over the heavy rain area as well. Numerous relationships are identified between the heavy rainfall amounts and the character of synoptic features; however, the nature of these relationships is found to vary strongly according to the synoptic pattern.

Corresponding author address: Dr. Charles E. Konrad II, Department of Geography, University of North Carolina at Chapel Hill, 203 Saunders Hall, CB3220, Chapel Hill, NC 27599-3220.

Email: konrad@geog.unc.edu

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  • Belville, J. D., and E. H. Goetsch, 1983: Synoptic and mesoscale considerations of a heavy rainfall event associated with warm top convection. Preprints, Fifth Conf. on Hydrometeorology, Tulsa, OK, Amer. Meteor. Soc., 198–205.

  • Bosart, L. F., and F. H. Carr, 1978: A case study of excessive rainfall centered around Wellsville, New York, 20–21 June 1972. Mon. Wea. Rev.,106, 348–362.

    • Crossref
    • Export Citation

  • Chappell, C. F., 1986. Quasi-stationary convective events. Mesoscale Meteorology and Forecasting, P. S. Ray, Ed., Amer. Meteor. Soc., 289–310.

    • Crossref
    • Export Citation

  • Crysler, K. A., R. A. Maddox, L. R., Hoxit, and B. M. Muller, 1982: Diurnal distribution of very heavy precipitation over the central and eastern United States. Natl. Wea. Dig.,7, 33–37.

  • Davis, R. E., and R. F. Rogers, 1992: A synoptic climatology of severe storms in Virginia. Prof. Geogr.,44, 319–32.

    • Crossref
    • Export Citation

  • Doswell, C. A., H. A. Brooks, and R. A. Maddox, 1996: Flash flood forecasting: An ingredients-based methodology. Wea. Forecasting,11, 560–581.

    • Crossref
    • Export Citation

  • Funk, T. W., 1991: Forecasting techniques utilized by the Forecasting Brach of the National Meteorological Center during a major convective rainfall event. Wea. Forecasting,6, 548–564.

    • Crossref
    • Export Citation

  • Giordano, L. A., and J. M. Fritsch, 1983: The a-typical mid-level flow for flash floods in the mid-Atlantic states. Preprints, Fifth Conf. on Hydrometeorology, Tulsa, OK, Amer. Meteor. Soc., 142–148.

  • Grice, G. K., and G. F. Ely 1983: Surface subsynoptic and upper air analysis: An integral part of the shift routine. Preprints, Fifth Conf. on Hydrometeorology, Tulsa, OK, Amer. Meteor. Soc., 252–258.

  • ——, and R. A. Maddox, 1983: Synoptic characteristics of heavy rain events in south Texas. Preprints, Fifth Conf. on Hydrometeorology, Tulsa, OK, Amer. Meteor. Soc., 149–155.

  • Heideman, K. F., and J. M. Fritsch, 1988. Forcing mechanisms and other characteristics of significant summertime precipitation. Wea. Forecasting,3, 115–130.

    • Crossref
    • Export Citation

  • Holton, J. R., 1979: An Introduction to Dynamic Meteorology. Academic Press, 319 pp.

  • Hoxit, L. R., R. A. Maddox, H. M. Mogil, and F. L. Zuckerberg, 1978: Meteorological analysis of the Johnstown Pennsylvania flash flood, 19–20 July 1977. Preprints, Second Conf. on Flash Floods: Hydrometeorological and Human Aspects, Atlanta, GA, Amer. Meteor. Soc., 168–175.

  • Konrad, C. E., 1994: Moisture trajectories associated with heavy rainfall in the Appalachian region of the United States. Phys. Geogr.,15, 227–248.

    • Crossref
    • Export Citation

  • ——, and S. J. Colucci, 1989: An examination of extreme cold air outbreaks over eastern North America. Mon. Wea. Rev.,117, 2687–2700.

    • Crossref
    • Export Citation

  • ——, and V. Meentemeyer, 1994: Lower tropospheric warm air advection patterns associated with heavy rainfall over the Appalachian region. Prof. Geog.,46, 143–155.

    • Crossref
    • Export Citation

  • Korty, B., 1980: Excessive rainfall across east Texas and the lower Mississippi Valley. Preprints, Second Conf. on Flash Floods: Hydrometeorological Aspects and Human Aspects, Atlanta, GA, Amer. Meteor. Soc., 11–17.

  • Ma, K., and L. F. Bosart, 1990: A synoptic overview of a heavy rain event in southern China. Wea. Forecasting,5, 89–112.

    • Crossref
    • Export Citation

  • Maddox, R. A., and C. A. Doswell, 1982: An examination of jet stream configurations, 500 mb vorticity advection and low-level thermal advection patterns during extended periods of intense convection. Mon. Wea. Rev.,110, 184–197.

    • Crossref
    • Export Citation

  • ——, C. F. Chappell, and L. R. Hoxit, 1979: Synoptic and meso-a scale aspects of flash flood events. Bull. Amer. Meteor. Soc.,60, 115–123.

    • Crossref
    • Export Citation

  • Newton, C. W., and J. C. Fankhauser, 1975: Movement and propagation of multi-cellular convective storms. Pure Appl. Geophys.,113, 747–764.

    • Crossref
    • Export Citation

  • National Climate Data Center, 1993: Radiosonde data of North America (1946–1992). Version 1.

  • Opitz, H. H., S. G. Summer, D. A. Wert, W. R. Synder, R. J. Kane, R. H. Brady, P. M. Stokols, and G. M. Carter, 1995: The challenge of forecasting heavy rain and flooding throughout the eastern region of the National Weather Service. Part II: Forecast techniques and applications. Wea. Forecasting,10, 91–104.

  • Reynolds, S. D., 1992: An excessive rainfall event caused by the remnants of a tropical cyclone, theta-e ridge, and complex terrain. NOAA Tech. Memo. NWS ER-87, National Weather Service, Washington, DC, 95–109.

  • SAS Institute, 1988: SAS/STAT user’s guide. SAS Institute Inc., 1028 pp. [Available from SAS Institute Inc., SAS Campus Drive, Cary, NC, 27513.].

  • Schwartz, B. E., C. F. Chappell, W. E. Togstad, and X. P. Zong, 1990: The Minneapolis flash flood: Meteorological analysis and operational response. Wea. Forecasting,5, 3–21.

    • Crossref
    • Export Citation

  • Stooksbury, D. E., and P. J. Michaels, 1991: Cluster analysis of southeastern U.S. climate stations. Theor. Appl. Climatol.,44, 143–50.

    • Crossref
    • Export Citation

  • Wilson, W. H., 1992: The role of surface moisture, convergence, and 850 mb equivalent potential temperature on the formation of a flash flood producing thunderstorm. NOAA Tech. Memo. NWS ER-87, National Weather Service, Washington, DC, 121–128.

  • Winkler, J. A., 1987: Diurnal variations of summertime very heavy precipitation in the eastern and central United States. Phys. Geogr.,8, 210–224.

  • ——, 1988: Climatological characteristics of summer-time extreme rainstorms in Minnesota. Annu. Assoc. Amer. Geogr.,78, 57–73.

    • Crossref
    • Export Citation

  • Woodcock, F., 1980: On the use of analogues to improve regression forecasts. Mon. Wea. Rev.,108, 292–297.

    • Crossref
    • Export Citation
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