Article Type:
Research Article

The 8 and 9 July 1993 Nebraska Derecho: An Observational Study and Comparison to the Climatology of Related Mesoscale Convective Systems

Mace L. Bentley Climatology Research Laboratory, Department of Geography, University of Georgia, Athens, Georgia

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Stonie R. Cooper The Weather Channel, Atlanta, Georgia

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Print Publication:
01 Sep 1997
DOI:
https://doi.org/10.1175/1520-0434(1997)012<0678:TAJNDA>2.0.CO;2
Page(s):
678–688
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Abstract

This study addresses a particularly damaging derecho that occurred on 8 and 9 July 1993. This progressive, warm season derecho organized in northeastern Colorado and swept through Nebraska and Kansas before dissipating in western Iowa. Records indicate this was one of the costliest single storms in Nebraska’s history.

A detailed analysis was conducted to determine which synoptic and mesoscale processes initiated, sustained, and dissipated the derecho. Research has provided insights into derecho environments and structure; however, observational studies using comprehensive datasets are necessary for comparative examinations.

This study presents several unique characteristics of the derecho-producing mesoscale convective system, including multiscale interactions and observational data with strong temporal relevance to the event. It is both the climatological and unique characteristics that are examined in this investigation.

Corresponding author address: Mace L. Bentley, Climatology Research Laboratory, Department of Geography, University of Georgia, Athens, GA 30602-2502.

Email: mbentley@cacimbo.ggy.uga.edu

Abstract

This study addresses a particularly damaging derecho that occurred on 8 and 9 July 1993. This progressive, warm season derecho organized in northeastern Colorado and swept through Nebraska and Kansas before dissipating in western Iowa. Records indicate this was one of the costliest single storms in Nebraska’s history.

A detailed analysis was conducted to determine which synoptic and mesoscale processes initiated, sustained, and dissipated the derecho. Research has provided insights into derecho environments and structure; however, observational studies using comprehensive datasets are necessary for comparative examinations.

This study presents several unique characteristics of the derecho-producing mesoscale convective system, including multiscale interactions and observational data with strong temporal relevance to the event. It is both the climatological and unique characteristics that are examined in this investigation.

Corresponding author address: Mace L. Bentley, Climatology Research Laboratory, Department of Geography, University of Georgia, Athens, GA 30602-2502.

Email: mbentley@cacimbo.ggy.uga.edu

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  • Abeling, W. A., 1990: A case study of the 29 May 1989 derecho over North Dakota and Minnesota. Preprints, 16th Conf. on Severe Local Storms, Kananaskis Park, AB, Canada, Amer. Meteor. Soc., 403–405.

  • Chang, J., and P. J. Wetzel, 1991: Effects of spatial variations of soil moisture and vegetation on the evolution of a prestorm environment: A numerical case study. Mon. Wea. Rev.,119, 1368–1390.

    • Crossref
    • Export Citation

  • Fujita, T. T., 1981: Tornadoes and downburst in the context generalized planetary scales. J. Atmos. Sci.,38, 1154–1534.

    • Crossref
    • Export Citation

  • ——, and R. M. Wakimoto, 1981: Five scales of airflow associated with a series of downbursts on 16 July 1980. Mon. Wea. Rev.,109, 1438–1456.

    • Crossref
    • Export Citation

  • Houze, R. A., S. A. Rutledge, M. I. Biggerstaff, and B. F. Smull, 1989: Interpretation of doppler weather radar displays of midlatitude mesoscale convective systems. Bull. Amer. Meteor. Soc.,70, 608–619.

    • Crossref
    • Export Citation

  • Howard, K. W., R. A. Maddox, and D. M. Rodgers, 1985: Meteorological conditions associated with a severe weather producing MCS over the northern Plains. Preprints, 14th Conf. on Severe Local Storms, Indianapolis, IN, Amer. Meteor. Soc., J43–J46.

  • Johns, R. H., 1984: A synoptic climatology of northwest flow severe weather outbreaks. Part II: Meteorological parameters and synoptic patterns. Mon. Wea. Rev.,112, 449–464.

    • Crossref
    • Export Citation

  • ——, 1993: Meteorological conditions associated with bow echo development in convective storms. Wea. Forecasting,8, 294–299.

  • ——, and W. D. Hirt, 1987: Derechos: Widespread convectively induced windstorms. Wea. Forecasting,2, 32–49.

    • Crossref
    • Export Citation

  • ——, and C. A. Doswell III, 1992: Severe local storms forecasting. Wea. Forecasting,7, 588–612.

    • Crossref
    • Export Citation

  • ——, K. W. Howard, and R. A. Maddox, 1990: Conditions associated with long-lived derechos—An examination of the large-scale environment. Preprints, 16th Conf. on Severe Local Storms, Kananaskis Park, AB, Canada, Amer. Meteor. Soc., 408–412.

  • Knupp, K. R., and W. R. Cotton, 1985: Downdraft initiation within precipitating convective clouds. Preprints, 14th Conf. on Severe Local Storms, Indianapolis, IN, Amer. Meteor. Soc., 171–174.

  • ——, and D. P. Jorgensen, 1985: Case study analysis of a large-scale and long-lived downburst-producing storm. Preprints, 14th Conf. on Severe Local Storms, Indianapolis, IN, Amer. Meteor. Soc., 301–304.

  • Maddox, R. A., and C. A. Doswell III, 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

  • McCarthy, D. H., 1985: The leading edge gradient signature: A severe storm identifier from enhanced infrared satellite imagery. Preprints, 14th Conf. on Severe Local Storms, Indianapolis, IN, Amer. Meteor. Soc., 390–393.

  • Moller, A. R., C. A. Doswell III, and R. W. Przybylinski, 1990: High precipitation supercells: A conceptual model and documentation. Preprints, 16th Conf. on Severe Local Storms, Kananaskis Park, AB, Canada, Amer. Meteor. Soc., 52–57.

  • NCDC, 1993: Storm Data.35 (7), 177–183.

  • Przybylinski, R. W., and W. J. Gery, 1983: The reliability of the bow echo as an important severe weather signature. Preprints, 13th Conf. on Severe Local Storms, Tulsa, OK, Amer. Meteor. Soc., 270–273.

  • ——, and D. M. DeCaire, 1985: Radar signatures associated with the derecho, a type of mesoscale convective system. Preprints, 14th Conf. on Severe Local Storms, Indianapolis, IN, Amer. Meteor. Soc., 228–231.

  • ——, and G. K. Schmocker, 1993: The evolution of a widespread convective wind event over central and eastern Missouri. Preprints, 13th Conf. on Weather Forecasting and Analysis, Vienna, VA, Amer. Meteor. Soc., 461–465.

  • Rotunno, R., J. B. Klemp, and M. L. Weisman, 1988: A theory for strong, long-lived squall lines. J. Atmos. Sci.,45, 463–485.

    • Crossref
    • Export Citation

  • Schaefer, J. T., D. L. Kelly, and C. A. Doswell III, 1985: The annual progression of non-tornadic severe thunderstorm events in the U.S.A. Preprints, 14th Conf. on Severe Local Storms, Indianapolis, IN, Amer. Meteor. Soc., 5–8.

  • Schmidt, J. M., 1991: Numerical and observational investigations of long-lived, MCS-induced, severe surface wind events: The derecho Ph.D. dissertation, Colorado State University, 196 pp. [Available from CSU Library, Fort Collins, CO 80526.].

  • ——, and W. R. Cotton, 1989: A high plains squall line associated with severe surface winds. J. Atmos. Sci.,46, 281–302.

    • Crossref
    • Export Citation

  • ——, and ——, 1990: Interactions between upper and lower tropospheric gravity waves on squall line structure and maintenance. J. Atmos. Sci.,47, 1205–1222.

    • Crossref
    • Export Citation

  • ——, C. J. Tremback, and W. R. Cotton, 1990: Numerical simulations of a derecho event: Synoptic and mesoscale components. Preprints, 16th Conf. on Severe Local Storms, Kananaskis Park, AB, Canada, Amer. Meteor. Soc., 422–427.

  • Smith, B. E., 1990: Mesoscale structure of a derecho-producing convective system: The southern Great Plains storms of May 4, 1989. Preprints, 16th Conf. on Severe Local Storms, Kananaskis Park, AB, Canada, Amer. Meteor. Soc., 455–460.

  • Weisman, M. L., 1990: The numerical simulation of bow echoes. Preprints, 16th Conf. on Severe Local Storms, Kananaskis Park, AB, Canada, Amer. Meteor. Soc., 428–433.

  • ——, 1992: The role of convectively generated rear-inflow jets in the evolution of long-lived mesoconvective systems. J. Atmos. Sci.,49, 1826–1847.

    • Crossref
    • Export Citation

  • ——, 1993: The genesis of severe, long-lived bow echoes. J. Atmos. Sci.,50, 645–670.

    • Crossref
    • Export Citation

  • ——, J. B. Klemp, and R. Rotunno, 1988: Structure and evolution of numerically simulated squall lines. J. Atmos. Sci.,45, 1990–2013.

    • Crossref
    • Export Citation
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