Lemon technique

The Lemon technique is a method used by meteorologists using weather radar to determine the relative strength of thunderstorm cells in a vertically sheared environment. It is named for Leslie R. Lemon, the co-creator of the current conceptual model of a supercell.[1] The Lemon technique is largely a continuation of work by Keith A. Browning, who first identified and named the supercell.[2][3][4]

The method focuses on updrafts and uses weather radar to measure quantities such as height (echo tops), reflectivity (such as morphology and gradient), and location to show features and trends described by Lemon.[5][6] These features include:

Vertical cross-section through a supercell exhibiting a BWER.

See also

References

  1. Lemon, Leslie R.; Charles A. Doswell III (September 1979). "Severe Thunderstorm Evolution and Mesocyclone Structure as Related to Tornadogenesis". Mon. Wea. Rev. 107 (9): 1184–97. Bibcode:1979MWRv..107.1184L. doi:10.1175/1520-0493(1979)107<1184:STEAMS>2.0.CO;2.
  2. Browning, Keith A.; Frank H. Ludlam (April 1962). "Airflow in convective storms" (PDF). Q. J. R. Met. S. 88 (376): 117–35. Bibcode:1962QJRMS..88..117B. doi:10.1002/qj.49708837602.; Browning, K. A.; Ludlam, F. H. (1962). "Airflow in convective storms". Q. J. R. Met. S. 88 (378): 555. Bibcode:1962QJRMS..88..555B. doi:10.1002/qj.49708837819.
  3. Browning, Keith A. (November 1964). "Airflow and Precipitation Trajectories Within Severe Local Storms Which Travel to the Right of the Winds". J. Atmos. Sci. 21 (6): 634–9. Bibcode:1964JAtS...21..634B. doi:10.1175/1520-0469(1964)021<0634:AAPTWS>2.0.CO;2.
  4. Browning, Keith (November 1965). "Some Inferences About the Updraft Within a Severe Local Storm". J. Atmos. Sci. (abstract) 22 (6): 669–77. Bibcode:1965JAtS...22..669B. doi:10.1175/1520-0469(1965)022<0669:SIATUW>2.0.CO;2.
  5. Lemon, Leslie R. (July 1977). New severe thunderstorm radar identification techniques and warning criteria: a preliminary report. Kansas City, MO: Techniques Development Unit, National Severe Storms Forecast Center.
  6. Lemon, Leslie R. (April 1980). New Severe Thunderstorm Radar Identification Techniques and Warning Criteria. Kansas City, MO: Techniques Development Unit, National Severe Storms Forecast Center.
  7. AMS Glossary
  8. AMS Glossary
  9. AMS Glossary

External links

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