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    Experimental GOES Sounder Products for the Assessment of Downburst Potential

    Source: Weather and Forecasting:;2000:;volume( 015 ):;issue: 005::page 527
    Author:
    Ellrod, Gary P.
    ,
    Nelson, James P.
    ,
    Witiw, Michael R.
    ,
    Bottos, Lynda
    ,
    Roeder, William P.
    DOI: 10.1175/1520-0434(2000)015<0527:EGSPFT>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: Several experimental products derived from Geostationary Operational Environmental Satellite (GOES) Sounder retrievals (vertical profiles of temperature and moisture) have been developed to assist weather forecasters in assessing the potential for convective downbursts. The product suite currently includes the wind index (WINDEX), a dry microburst index, and the maximum difference in equivalent potential temperature (?e) from the surface to 300 hPa. The products are displayed as color-coded boxes or numerical values, superimposed on GOES visible, infrared, or water vapor imagery, and are available hourly, day and night, via the Internet. After two full summers of evaluation, the products have been shown to be useful in the assessment of atmospheric conditions that may lead to strong, gusty surface winds from thunderstorms. Two case studies are presented: 1) a severe downburst storm in southern Arizona that produced historic surface wind speeds and damage, and 2) multiple dry and wet downbursts in western Kansas that resulted in minor damage. Verification involved comparing the parameters with radiosonde data, numerical model first guess data, or surface wind reports from airports, mesonetworks, or storm spotters. Mean absolute WINDEX from the GOES retrievals differed from the mean surface wind gust reports by <2 kt (1 m s?1) for 82 events, but underestimated wind gusts for 7 nighttime events by 22 kt (11 m s?1). GOES WINDEX was also slightly better than that derived from the concurrent National Centers for Environmental Prediction?s Eta Model first guess. There are plans to incorporate these downburst parameters into a future upgrade of the National Weather Service?s Advanced Weather Interactive Processing System, with the option to derive them from either GOES Sounder data, radiosondes, or numerical model forecast data.
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      Experimental GOES Sounder Products for the Assessment of Downburst Potential

    URI
    http://yetl.yabesh.ir/yetl1/handle/yetl/4168823
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    • Weather and Forecasting

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    contributor authorEllrod, Gary P.
    contributor authorNelson, James P.
    contributor authorWitiw, Michael R.
    contributor authorBottos, Lynda
    contributor authorRoeder, William P.
    date accessioned2017-06-09T14:59:13Z
    date available2017-06-09T14:59:13Z
    date copyright2000/10/01
    date issued2000
    identifier issn0882-8156
    identifier otherams-3138.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4168823
    description abstractSeveral experimental products derived from Geostationary Operational Environmental Satellite (GOES) Sounder retrievals (vertical profiles of temperature and moisture) have been developed to assist weather forecasters in assessing the potential for convective downbursts. The product suite currently includes the wind index (WINDEX), a dry microburst index, and the maximum difference in equivalent potential temperature (?e) from the surface to 300 hPa. The products are displayed as color-coded boxes or numerical values, superimposed on GOES visible, infrared, or water vapor imagery, and are available hourly, day and night, via the Internet. After two full summers of evaluation, the products have been shown to be useful in the assessment of atmospheric conditions that may lead to strong, gusty surface winds from thunderstorms. Two case studies are presented: 1) a severe downburst storm in southern Arizona that produced historic surface wind speeds and damage, and 2) multiple dry and wet downbursts in western Kansas that resulted in minor damage. Verification involved comparing the parameters with radiosonde data, numerical model first guess data, or surface wind reports from airports, mesonetworks, or storm spotters. Mean absolute WINDEX from the GOES retrievals differed from the mean surface wind gust reports by <2 kt (1 m s?1) for 82 events, but underestimated wind gusts for 7 nighttime events by 22 kt (11 m s?1). GOES WINDEX was also slightly better than that derived from the concurrent National Centers for Environmental Prediction?s Eta Model first guess. There are plans to incorporate these downburst parameters into a future upgrade of the National Weather Service?s Advanced Weather Interactive Processing System, with the option to derive them from either GOES Sounder data, radiosondes, or numerical model forecast data.
    publisherAmerican Meteorological Society
    titleExperimental GOES Sounder Products for the Assessment of Downburst Potential
    typeJournal Paper
    journal volume15
    journal issue5
    journal titleWeather and Forecasting
    identifier doi10.1175/1520-0434(2000)015<0527:EGSPFT>2.0.CO;2
    journal fristpage527
    journal lastpage542
    treeWeather and Forecasting:;2000:;volume( 015 ):;issue: 005
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
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