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Regional and Mesoscale Meteorology Branch

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LTO Boundaries at Night

Instructors:

A. Mostek

B. Motta

J. Weaver

K. Winston

S. Bachmeier

J. Dostalek

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Topic:

Archived Training

Severe/Sat

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Developed:

1998

Detecting Low-level Thunderstorm Outflow Boundaries At Night Using GOES

Based on “Nighttime Detection of Low-level Thunderstorm Outflow Using a GOES Multispectral Image Product” by J. Dostalek et al

Introduction


This case reviews the use of the GOES imager channels to detect and monitor the evolution of LTO boundaries at night. LTO boundaries have been monitored for years using the high resolution visible channel during the day. With the advent of the 3.9 micron channel on the GOES-8, -9 and –10 imager instrument, it is now possible to use the fog/stratus product to monitor the LTO boundaries during the night.

The goal of this teletraining session is to review the use of the various GOES IR channels and products in monitoring LTO boundaries at night.

Training Session Options


  1. VISITview playback without Audio – You may step through the VISITview file on your own to view the presentation. If talking points are available, you may use these in tandem with going through the slides.

    Create a directory to download the playback file from the following site: http://rammb.cira.colostate.edu/training/visit/training_sessions/lto_boundaries_at_night/lto_boundaries_at_night.exe

    After extracting the files into that directory click on the visitlocal.bat file to start the lesson. Advance slides on your own using the navigation controls (i.e., the Next button will advance to the next slide)

References/Additional Links


  • Talking points are available for this lesson and may be printed out to easily review the session in detail at any time.
  • Dostalek, J.F., J.W. Weaver, J.F.W. Purdom, K.Y. Winston, 1997: Nighttime Detection of Low Level Thunderstorm Outflow Using a GOES Multispectral Image Product. Weather and Forecasting
  • Ellrod, G.P., 1994: Detection and analysis of fog at night using GOES multispectral infrared imagery. NOAA Technical Report NESDIS 75, 22pp.
  • Maddox, R.A., L.R. Hoxit, and C.F. Chappell, 1980: A study of tornadic thunderstorm interactions with thermal boundaries. Mon. Wea. Rev., 108, 322-336.
  • Markowski, Paul M., Jerry M. Straka, Erik N. Rasmussen, David O. Blanchard, 1998: Variability of Storm-Relative Helicity during VORTEX. Monthly Weather Review: Vol. 126, No. 11, pp. 2959-2971.
  • Markowski, Paul M., Erik N. Rasmussen, Jerry M. Straka, David C. Dowell, 1998: Observations of Low-Level Baroclinity Generated by Anvil Shadows. Monthly Weather Review: Vol. 126, No. 11, pp. 2942-2958.
  • Markowski, Paul M., Erik N. Rasmussen, Jerry M. Straka, 1998: The Occurrence of Tornadoes in Supercells Interacting with Boundaries during VORTEX-95. Weather and Forecasting: Vol. 13, No. 3, pp. 852-859.
  • Nelson, J.P. and G.P. Ellrod, 1996: Screened GOES-8 Multispectral (10.7-3.9 micron) Satellite Imagery to Detect Stratus and Fog at Night. Preprints, Eighth Conf. on Satellite Meteorology and Oceanography, Atlanta, GA, Amer. Meteor. Soc., 172-178.
  • Purdom, J.F.W., 1973: Meso-highs and satellite imagery. Mon. Wea. Rev., 101, 180-181.
  • Purdom, J.F.W., 1976: Some uses of high-resolution GOES imagery in the mesoscale forecasting of convection and its behavior. Mon. Wea. Rev., 104, 1474-1483.
  • Weaver, J.F., 1979: Storm motion as related to boundary-layer convergence. Mon Wea. Rev., 107, 612-619.
  • Weaver, J.F. and S.P. Nelson, 1982: Multiscale aspects of thunderstorm gust fronts and their effects on subsequent storm development. Mon. Wea. Rev., 110, 708-718.
  • Weaver, J.F. and J.F.W. Purdom, 1995: An interesting mesoscale storm-environment interaction observed just prior to changes in severe storm behavior. Wea. and Forecasting, 10, 449-453.
  • Wilson, J.W. and K.E. Wilk, 1981: Nowcasting applications of Doppler radar. Proc. IAMAP Symposium, Hamburg, Germany, 25-28 August 1981, 123-134.
  • Wilson, J.W. and W.E. Schreiber, 1986: Initiation of convective storms by radar-observed boundary layer convergent lines. Mon. Wea. Rev., 114, 2516-2536.
This course is Basic

Prior to attending this session on low-level thunderstorm outflow (LTO) boundaries for 31 May 1996, you should review the following materials:

  • COMET SatMet1 CD-ROM module – Chapter 6 – Section 4 on the GOES 3.9 micrometer channel.
  • Markowski, Paul M., Erik N. Rasmussen, Jerry M. Straka, 1998: The Occurrence of Tornadoes in Supercells Interacting with Boundaries during VORTEX-95. Weather and Forecasting: Vol. 13, No. 3, pp. 852-859.
  • Note you may download and print this reference at http://ams.allenpress.com

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