Meteorology
Meteorology calculators for Skew-T diagrams, CAPE/CIN, heat index, WBGT, tornado risk, and wind power density.
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CAPE and CIN Calculator
Calculate Convective Available Potential Energy (CAPE) and Convective Inhibition (CIN) from parcel and environmental temperatures at multiple pressure levels.
Drought Index Calculator
Estimate a Palmer Drought Severity Index (PDSI) category from temperature, precipitation, and soil moisture data. Includes water balance analysis and impact assessment.
Heat Index Deep Calculator
Calculate the heat index using the full Rothfusz regression equation with NWS adjustments. Includes risk assessment and exposure-duration guidance.
Lightning Distance Calculator
Calculate the distance to a lightning strike from the flash-to-bang time delay. Includes temperature-adjusted speed of sound and safety guidance.
Precipitation Type Forecaster
Forecast precipitation type (rain, snow, sleet, freezing rain) from temperatures at multiple atmospheric levels. Uses the thermal profile warm-nose method.
Skew-T Log-P Reader
Estimate atmospheric stability parameters from surface observations and upper-air data. Calculates CAPE, LCL, LFC, and Lifted Index using simplified thermodynamic profiles.
Tornado Risk Calculator
Calculate the Significant Tornado Parameter (STP) and Supercell Composite Parameter from CAPE, wind shear, storm-relative helicity, and LCL height.
Visibility Calculator
Estimate atmospheric visibility from humidity, precipitation rate, and particulate concentration. Provides aviation flight category and driving safety guidance.
Wet Bulb Globe Temperature
Calculate the Wet Bulb Globe Temperature (WBGT), the gold standard for heat stress assessment. Provides military/OSHA flag color, work-rest cycles, and hydration guidance.
Wind Power Density
Calculate wind power density (W/m²) from average wind speed, air density, and Weibull shape factor. Includes NREL wind class and sample turbine output estimates.