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Brian J. Squitieri Department of Geological and Atmospheric Sciences, Iowa State University, Ames, Iowa

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William A. Gallus Jr. Department of Geological and Atmospheric Sciences, Iowa State University, Ames, Iowa

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Abstract

An error was discovered in the code used to calculate neighborhood equitable threat scores (nETSs) in Squitieri and Gallus. Replicating results with the error corrected revealed that most of the conclusions from Squitieri and Gallus remained the same, but with one significant new finding and one notable change in results. In the original manuscript, very few correlations between MCS QPF skill and LLJ forecast accuracy could be denoted among weakly forced cases, with none of them being statistically significant. Applying the aforementioned correction, it was found that QPF skill during the mature stage of MCSs significantly correlated with moisture forecast accuracy within developing LLJs for weakly forced events. It was also found that correlations between MCS QPF skill and LLJ potential temperature forecast accuracy occurred earlier in the evening.

Supplemental information related to this paper is available at the Journals Online website: https://doi.org/10.1175/WAF-D-19-0022.s1.

© 2019 American Meteorological Society. For information regarding reuse of this content and general copyright information, consult the AMS Copyright Policy (www.ametsoc.org/PUBSReuseLicenses).

Corresponding author: Brian Squitieri, brianjs@iastate.edu

Abstract

An error was discovered in the code used to calculate neighborhood equitable threat scores (nETSs) in Squitieri and Gallus. Replicating results with the error corrected revealed that most of the conclusions from Squitieri and Gallus remained the same, but with one significant new finding and one notable change in results. In the original manuscript, very few correlations between MCS QPF skill and LLJ forecast accuracy could be denoted among weakly forced cases, with none of them being statistically significant. Applying the aforementioned correction, it was found that QPF skill during the mature stage of MCSs significantly correlated with moisture forecast accuracy within developing LLJs for weakly forced events. It was also found that correlations between MCS QPF skill and LLJ potential temperature forecast accuracy occurred earlier in the evening.

Supplemental information related to this paper is available at the Journals Online website: https://doi.org/10.1175/WAF-D-19-0022.s1.

© 2019 American Meteorological Society. For information regarding reuse of this content and general copyright information, consult the AMS Copyright Policy (www.ametsoc.org/PUBSReuseLicenses).

Corresponding author: Brian Squitieri, brianjs@iastate.edu

Supplementary Materials

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  • Squitieri, B. J., and W. A. Gallus Jr., 2016: WRF forecasts of Great Plains nocturnal low-level jet driven MCSs. Part I: Correlation between low-level jet forecast accuracy and MCS precipitation forecast skill. Wea. Forecasting, 31, 13011323, https://doi.org/10.1175/WAF-D-15-0151.1.

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