MeteoMate

Reading NetCDF Files

library(MeteoMate)
# f_ERA5_pl <- system.file("", package = "MeteoMate")

MeteoMate Design

Writing NetCDF

Additional Indices

Here is a list of convective indices that can be estimated using previously calculated indices:

SWISS00 Index

It is defined by Huntrieser et al. (1997) as:

$$SWISS00 = SHOW + 0.4 \times WSh_{3-6} + ta_{600} - td_{600}$$ where:

• $SHOW$ is the Showalter Index estimated using Showalter_Index()
• $WSh_{3-6}$ is the length (or magnitude/norm) of the wind vector (m/s) that must be added to the wind vector at 3 km AGL to obtain the wind vector at 6 km AGL, estimated as wind_shear(...., h1=3000, h2 = 6000,...) * 3000.0
• $ta_{600}$ is the air temperature at 600 hPa
• $td_{600}$ is the dew point temperature at 600 hPa

SWISS12 Index

It is defined by Huntrieser et al. (1997) as:

$$SWISS12 = SHOW + 0.4 \times WSh_{0-3} + ta_{650} - td_{650}$$ where:

• $SHOW$ is the Showalter Index estimated using Showalter_Index()
• $WSh_{0-3}$ is is the length (or magnitude/norm) of the wind vector (m/s) that must be added to the wind vector at 0 km AGL to obtain the wind vector at 3 km AGL, estimated as wind_shear(...., h1=0, h2 = 3000,...) * 3000.0
• $ta_{650}$ is the air temperature at 650 hPa
• $td_{650}$ is the dew point temperature at 650 hPa

Thompson Index

it is defined by Haklander and Van Delden (2003) as the difference between the K Index (i.e., K_Index()) and the Lifted Index for a 50 hPa mixed layer parcel near the surface (i.e., Lifted_index_ml(..., dp=50,...)).

Upward Vertical Velocity (UVV)

surface CAPE

Craven Index

References

• Haklander, A. J., & Van Delden, A. (2003). Thunderstorm predictors and their forecast skill for the Netherlands. Atmospheric Research, 67–68, 273–299.
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• Huntrieser, H., Schiesser, H.H., Schmid, W., Waldvogel, A., 1997. Comparison of traditional and newly developed thunderstorm indices for Switzerland. Weather Forecast. 12, 108–125.