Diagnostic variable reference

All 125 variables registered in the wrf-core diagnostic registry, in registry order. Every entry is callable from Python as getvar(f, name) and from Rust as wrf_core::getvar. Name lookup is case-insensitive, and every alias is equivalent to its canonical name.

Generated from crates/wrf-core/src/variables.rs at v0.3.0 (351b8f3) via cargo run -p wrf-core --example dump_variables → data/variables.json → node docs/tools/render-diagnostics-table.mjs. The extractor reads the registry directly (no source parsing for data fields) and cross-checks the group labels against the live registry, failing on any mismatch.

Reading the table

Units are the defaults; most fields convert via the units= keyword (for example units="degC").
Dim is the output shape per time step: 2-D (ny, nx) or 3-D (nz, ny, nx). A few stacked products (for example cape2d, uvmet) return a leading component axis in addition to the listed dimensionality.
Group is the section of the source registry the variable is defined in.
Variables whose description references ecape-rs or ECAPE solve an entraining-parcel model per column and are the most computationally expensive entries; consumers commonly schedule them separately.
Names not in this registry fall through to raw WRF file variables (RAINNC, PBLH, TSK, ...), which are readable by name but are not diagnostics and are not listed here.

125 of 125 variables

Variable	Aliases	Description	Units	Dim	Group
`pressure`	—	Full model pressure	hPa	3D	Foundation
`pres`	`p`, `pressure_pa`	Full model pressure	Pa	3D	Foundation
`height`	`z`, `height_msl`	Model height MSL	m	3D	Foundation
`height_agl`	`z_agl`	Model height AGL	m	3D	Foundation
`geopt`	`geopotential`	Full geopotential	m2/s2	3D	Foundation
`terrain`	`ter`, `hgt`	Terrain height	m	2D	Foundation
`t2`	`t2m`, `temperature_2m`	2-m temperature	K	2D	Foundation
`tv2m`	`virtual_temperature_2m`	2-m virtual temperature	K	2D	Foundation
`temp`	`tk`	Temperature	K	3D	Foundation
`tc`	`temp_c`	Temperature in Celsius	degC	3D	Foundation
`theta`	`th`, `potential_temperature`	Potential temperature	K	3D	Foundation
`ua`	`u_destag`	U-wind (destaggered)	m/s	3D	Foundation
`va`	`v_destag`	V-wind (destaggered)	m/s	3D	Foundation
`wa`	`w_destag`	W-wind (destaggered)	m/s	3D	Foundation
`lat`	`xlat`, `latitude`	Latitude	degrees	2D	Foundation
`lon`	`xlong`, `longitude`	Longitude	degrees	2D	Foundation
`theta_e`	`eth`	Equivalent potential temperature	K	3D	Thermodynamics
`tv`	`virtual_temperature`	Virtual temperature	K	3D	Thermodynamics
`twb`	`wet_bulb`	Wet-bulb temperature	K	3D	Thermodynamics
`td`	`dp`, `dewpoint`	Dewpoint temperature	degC	3D	Thermodynamics
`rh`	`relative_humidity`	Relative humidity	%	3D	Thermodynamics
`slp`	`sea_level_pressure`, `mslp`	Sea-level pressure	hPa	2D	Thermodynamics
`omega`	`vertical_velocity_pressure`	Vertical velocity in pressure coordinates	Pa/s	3D	Thermodynamics
`pw`	`precipitable_water`	Precipitable water	mm	2D	Moisture
`rh2m`	`rh2`, `relative_humidity_2m`	2-m relative humidity	%	2D	Moisture
`dp2m`	`td2`, `td2m`, `dewpoint_2m`	2-m dewpoint temperature	degC	2D	Moisture
`mixing_ratio`	`qvapor`, `water_vapor_mixing_ratio`	Water vapor mixing ratio	kg/kg	3D	Moisture
`specific_humidity`	`q`	Specific humidity	kg/kg	3D	Moisture
`sbcape`	`surface_based_cape`	Surface-based CAPE	J/kg	2D	CAPE
`sbcin`	`surface_based_cin`	Surface-based CIN	J/kg	2D	CAPE
`mlcape`	`mixed_layer_cape`	Mixed-layer CAPE	J/kg	2D	CAPE
`mlcin`	`mixed_layer_cin`	Mixed-layer CIN	J/kg	2D	CAPE
`mucape`	`most_unstable_cape`	Most-unstable CAPE	J/kg	2D	CAPE
`mucin`	`most_unstable_cin`	Most-unstable CIN	J/kg	2D	CAPE
`sb3cape`	`surface_based_3cape`, `surface_based_0_3km_cape`	Surface-based CAPE in the lowest 3 km	J/kg	2D	CAPE
`ml3cape`	`3cape`, `mixed_layer_3cape`, `mixed_layer_0_3km_cape`	Mixed-layer CAPE in the lowest 3 km	J/kg	2D	CAPE
`mu3cape`	`most_unstable_3cape`, `most_unstable_0_3km_cape`	Most-unstable CAPE in the lowest 3 km	J/kg	2D	CAPE
`sb6cape`	`surface_based_6cape`, `surface_based_0_6km_cape`	Surface-based CAPE in the lowest 6 km	J/kg	2D	CAPE
`ml6cape`	`6cape`, `mixed_layer_6cape`, `mixed_layer_0_6km_cape`	Mixed-layer CAPE in the lowest 6 km	J/kg	2D	CAPE
`mu6cape`	`most_unstable_6cape`, `most_unstable_0_6km_cape`	Most-unstable CAPE in the lowest 6 km	J/kg	2D	CAPE
`lcl`	`lcl_height`	Lifted condensation level height AGL	m	2D	CAPE
`lfc`	`lfc_height`	Level of free convection height AGL	m	2D	CAPE
`el`	`el_height`, `equilibrium_level`	Equilibrium level height AGL	m	2D	CAPE
`cape2d`	`cape_2d`	CAPE/CIN/LCL/LFC (backward-compat tuple)	J/kg	2D	CAPE
`cape3d`	`cape_3d`	3-D CAPE field	J/kg	3D	CAPE
`cape2d_wrfpython`	`cape_2d_wrfpython`, `cape2d_ncar`	Strict NCAR wrf-python cape_2d [MCAPE, MCIN, LCL, LFC]	J/kg	2D	CAPE
`mcape_wrfpython`	`mcape_ncar`	Strict NCAR wrf-python maximum-parcel CAPE	J/kg	2D	CAPE
`mcin_wrfpython`	`mcin_ncar`	Strict NCAR wrf-python maximum-parcel CIN magnitude	J/kg	2D	CAPE
`lcl_wrfpython`	`lcl_ncar`	Strict NCAR wrf-python maximum-parcel LCL height AGL	m	2D	CAPE
`lfc_wrfpython`	`lfc_ncar`	Strict NCAR wrf-python maximum-parcel LFC height AGL	m	2D	CAPE
`cape3d_wrfpython`	`cape_3d_wrfpython`, `cape3d_ncar`	Strict NCAR wrf-python levelwise [CAPE, CIN]	J/kg	3D	CAPE
`cape3d_only_wrfpython`	`cape_3d_only_wrfpython`	Strict NCAR wrf-python levelwise CAPE component	J/kg	3D	CAPE
`cin3d_wrfpython`	`cin_3d_wrfpython`	Strict NCAR wrf-python levelwise CIN component	J/kg	3D	CAPE
`wspd`	`wind_speed`	Wind speed	m/s	3D	Wind & SRH
`wdir`	`wind_direction`	Wind direction	degrees	3D	Wind & SRH
`uvmet`	`earth_rotated_wind`	U/V wind rotated to earth coordinates	m/s	3D	Wind & SRH
`uvmet10`	`earth_rotated_wind_10m`	10-m U/V wind rotated to earth coordinates	m/s	2D	Wind & SRH
`wspd10`	`wind_speed_10m`	10-m wind speed	m/s	2D	Wind & SRH
`wdir10`	`wind_direction_10m`	10-m wind direction	degrees	2D	Wind & SRH
`srh1`	`srh_0_1km`	0-1 km storm-relative helicity (Bunkers)	m2/s2	2D	Wind & SRH
`srh3`	`srh_0_3km`	0-3 km storm-relative helicity (Bunkers)	m2/s2	2D	Wind & SRH
`srh`	`storm_relative_helicity`, `helicity`	Storm-relative helicity (configurable depth, Bunkers)	m2/s2	2D	Wind & SRH
`srh_wrfpython`	`srh_ncar`, `srh_rip`, `srh_wrfpython_rip`	Storm-relative helicity (strict NCAR wrf-python RIP algorithm)	m2/s2	2D	Wind & SRH
`shear_0_1km`	`bulk_shear_1km`, `shr01`	0-1 km bulk wind shear	m/s	2D	Wind & SRH
`shear_0_6km`	`bulk_shear_6km`, `shr06`	0-6 km bulk wind shear	m/s	2D	Wind & SRH
`bunkers_rm`	`bunkers_right`	Bunkers right-moving supercell motion	m/s	2D	Wind & SRH
`bunkers_lm`	`bunkers_left`	Bunkers left-moving supercell motion	m/s	2D	Wind & SRH
`mean_wind_0_6km`	`mean_wind_6km`	0-6 km mean wind	m/s	2D	Wind & SRH
`avo`	`absolute_vorticity`	Absolute vorticity	10-5 s-1	3D	Remaining diagnostics
`pvo`	`potential_vorticity`	Potential vorticity	PVU	3D	Remaining diagnostics
`dbz`	`reflectivity`	Simulated reflectivity	dBZ	3D	Remaining diagnostics
`maxdbz`	`max_reflectivity`, `composite_reflectivity`, `mdbz`	Maximum (composite) reflectivity	dBZ	2D	Remaining diagnostics
`ctt`	`cloud_top_temperature`	Cloud-top temperature	degC	2D	Remaining diagnostics
`cloudfrac`	`cloud_fraction`	Cloud fraction (low/mid/high)	%	2D	Remaining diagnostics
`uhel`	`updraft_helicity`	Updraft helicity	m2/s2	2D	Remaining diagnostics
`stp`	`significant_tornado_parameter`	Significant Tornado Parameter (fixed or effective via layer_type)	dimensionless	2D	Severe & Extras
`stp_fixed`	—	STP fixed-layer (Thompson et al. 2003)	dimensionless	2D	Severe & Extras
`stp_effective`	`stp_eff`	STP effective-layer	dimensionless	2D	Severe & Extras
`scp`	`supercell_composite_parameter`	Supercell Composite Parameter (effective SRH + EBWD)	dimensionless	2D	Severe & Extras
`ehi`	`energy_helicity_index`	Energy-Helicity Index	dimensionless	2D	Severe & Extras
`ecape_scp`	`entraining_scp`, `experimental_ecape_scp`	Experimental SCP analog using ECAPE for the buoyancy term	dimensionless	2D	Severe & Extras
`ecape_ehi`	`entraining_ehi`, `experimental_ecape_ehi`	Experimental EHI analog using ECAPE for the buoyancy term	dimensionless	2D	Severe & Extras
`tehi`	`tornadic_0_1km_ehi`	SPC beta Tornadic 0-1 km EHI	dimensionless	2D	Severe & Extras
`tts`	`tornadic_tilting_stretching`, `tornadic_tilting_and_stretching`	SPC beta Tornadic Tilting and Stretching	dimensionless	2D	Severe & Extras
`vtp_mod`	`modified_violent_tornado_parameter`	Modified Violent Tornado Parameter	dimensionless	2D	Severe & Extras
`critical_angle`	`crit_angle`	Critical angle	degrees	2D	Severe & Extras
`ship`	`significant_hail_parameter`	Significant Hail Parameter	dimensionless	2D	Severe & Extras
`bri`	`bulk_richardson_number`	Bulk Richardson Number	dimensionless	2D	Severe & Extras
`dcape`	`downdraft_cape`	Downdraft CAPE	J/kg	2D	Severe & Extras
`dcp`	`derecho_composite_parameter`	Derecho Composite Parameter	dimensionless	2D	Severe & Extras
`wndg`	`wind_damage_parameter`	Wind Damage Parameter	dimensionless	2D	Severe & Extras
`esp`	`enhanced_stretching_potential`	Enhanced Stretching Potential	dimensionless	2D	Severe & Extras
`mmp`	`mcs_maintenance_probability`	MCS Maintenance Probability	dimensionless	2D	Severe & Extras
`lapse_rate_700_500`	`lr75`	700-500 hPa lapse rate	degC/km	2D	Severe & Extras
`lapse_rate_0_3km`	`lr03`	0-3 km AGL lapse rate	degC/km	2D	Severe & Extras
`freezing_level`	`fzlev`	Freezing level height AGL	m	2D	Severe & Extras
`wet_bulb_0`	`wb0`, `wet_bulb_zero`	Wet-bulb zero height AGL	m	2D	Severe & Extras
`k_index`	`kindex`	K Index	dimensionless	2D	Severe & Extras
`total_totals`	`totals_totals`, `t_totals`, `tot_tots`	Total Totals Index	dimensionless	2D	Severe & Extras
`mean_mixr`	`mean_mixing_ratio`, `low_level_mean_mixr`	Mean mixing ratio in the lowest 100 hPa	g/kg	2D	Severe & Extras
`low_rh`	`low_level_rh`, `mean_low_rh`	Mean RH in the lowest 100 hPa	%	2D	Severe & Extras
`mid_rh`	`mid_level_rh`, `mean_mid_rh`	Mean RH from 700-500 hPa	%	2D	Severe & Extras
`dgz_rh`	`dendritic_growth_zone_rh`	Mean RH through the dendritic growth zone	%	2D	Severe & Extras
`lcl_temp`	`lcl_temperature`	LCL temperature	degC	2D	Severe & Extras
`convective_temp`	`conv_t`, `convt`	Convective temperature	degC	2D	Severe & Extras
`max_temp`	`forecast_max_temp`, `maxt`	Forecast maximum surface temperature	degC	2D	Severe & Extras
`theta_w`	`wet_bulb_potential_temperature`	Wet-bulb potential temperature	K	3D	Severe & Extras
`fosberg`	`fwi`, `fosberg_fire_weather_index`	Fosberg Fire Weather Index	dimensionless	2D	Severe & Extras
`haines`	`haines_index`	Haines Index	dimensionless	2D	Severe & Extras
`hdw`	`hot_dry_windy`	Hot-Dry-Windy Index	dimensionless	2D	Severe & Extras
`cape`	—	CAPE (configurable parcel_type or custom parcel, supports top_m)	J/kg	2D	Configurable / generic variables
`cin`	—	CIN (configurable parcel_type or custom parcel, supports top_m)	J/kg	2D	Configurable / generic variables
`effective_inflow`	`eff_inflow`, `effective_inflow_layer`	Effective inflow layer base/top heights AGL	m	2D	Configurable / generic variables
`effective_cape`	`eff_cape`	MUCAPE within effective inflow layer	J/kg	2D	Configurable / generic variables
`ecape`	`entraining_cape`	Entraining CAPE from ecape-rs	J/kg	2D	Configurable / generic variables
`ncape`	`normalized_cape`	Normalized CAPE from ecape-rs	J/kg	2D	Configurable / generic variables
`ecape_cape`	`entraining_parcel_cape`	Entraining parcel CAPE from ecape-rs	J/kg	2D	Configurable / generic variables
`ecape_cin`	`ecin`, `entraining_parcel_cin`	Entraining parcel CIN from ecape-rs	J/kg	2D	Configurable / generic variables
`ecape_lfc`	`entraining_parcel_lfc`	Entraining parcel LFC from ecape-rs	m	2D	Configurable / generic variables
`ecape_el`	`entraining_parcel_el`	Entraining parcel EL from ecape-rs	m	2D	Configurable / generic variables
`effective_srh`	`srh_eff`, `eff_srh`	SRH over effective inflow layer (Bunkers)	m2/s2	2D	Configurable / generic variables
`ebwd`	`effective_bulk_wind_difference`, `effective_bulk_shear`	Effective bulk wind difference	m/s	2D	Configurable / generic variables
`bulk_shear`	`shear`	Bulk wind shear (configurable bottom_m / top_m)	m/s	2D	Configurable / generic variables
`mean_wind`	—	Mean wind (configurable bottom_m / top_m)	m/s	2D	Configurable / generic variables
`lapse_rate`	`lr`	Lapse rate (configurable bottom_m / top_m, use_virtual)	degC/km	2D	Configurable / generic variables

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