Significant tornado parameter
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The Significant Tornado Parameter, often abbreviated as STP or SigTor,[1] is a composite index used by the Storm Prediction Center to highlight areas across the United States where multiple ingredients for the development of tornadic supercells overlap,[2] [3] [4] [5] and the capability of potential tornadic supercells producing "significant" tornadoes of EF2 intensity or higher.[6] Values greater than 1 indicate an increased potential of significant tornadoes.[7]
Equation
[edit ]The equation used to calculate the parameter is as follows:[8]
STP = MLCAPE/1500 J/Kg^-1 x 2000-mlLCL/1000 m x ESRH/150 m/2 s^-2 x EBWD/20 m/s^-1 x 200+mlCIN/150 J/Kg^-1
See also
[edit ]References
[edit ]- ^ "Significant Tornado Parameter (STP)". NOAA . Retrieved 2025年04月21日.
- ^ Thompson, Rich. "EXPLANATION OF SPC SEVERE WEATHER PARAMETERS". Storm Prediction Center . Retrieved 2025年04月21日.
- ^ US Department of Commerce, NOAA. "Is tornado frequency increasing in parts of the U.S.?". National Weather Service . Retrieved 2025年04月21日.
- ^ "Significant Tornado Parameter (with CIN) Stats". National Weather Service . Retrieved 2025年04月21日.
- ^ "Forecasting severe convective storms". European Storm Forecast Experiment . Retrieved 2025年04月21日.
- ^ "Mid-Century Significant Hail and Tornado Potential". Guy Carpenter. Retrieved 2025年04月21日.
- ^ "Convective Parameters - SigTor". National Weather Service . Retrieved 2025年04月21日.
- ^ "Warning Methodology - Screen, Rank, Analyze, Decide (SRAD)" (PDF). National Weather Service . p. 9. Retrieved April 21, 2025.
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