Highlights

• Consistently use the WMO definition of relative humidity across calculations
• New calculations: wet bulb potential temperature, Corfidi MCS motion, DCAPE, and Galvez-Davidson Index
• Improvements for using isentropic interpolation with xarray data not natively on pressure surfaces (like WRF output)
• Support for specifying line stroke width in simplified plotting interface
• Support for controlling more style options for map layers in simplified plotting interface
• Support for rotated latitude longitude projection
• Support for Python 3.12
• Many bug fixes and clean ups

What's Changed

Breaking Changes 🛠

• Standardize RH calcs on WMO8 by @dcamron in #3242

New Features 🎉

• add downward cape by @wx4stg in #3120
• add corfidi MCS motion by @wx4stg in #3116
• Wet bulb potential temperature by @sec147 in #2952

Enhancements 😄

• Practical units for dry adiabatic lapse rate constant by @alexander-lakocy in #3118
• Add string formatting information to unit tutorial by @alexander-lakocy in #3119
• Update CCL/EL/LFC docstring to reflect that pressure should be monotonically decreasing by @Z-Richard in #3114
• Add rotated latitude longitude projection to mapping.py by @blaylockbk in #3123
• remove nans from bunkers input by @wx4stg in #3131
• Add mpl_args and PlotGeometry stroke_width by @kgoebber in #3183
• add more layer options for mappanel by @kgoebber in #3174
• Generalize testing version comparison by @dcamron in #3271
• DOC: Theme fixes, source links, and calendar by @dcamron in #3281
• Add heat_index calculation examples by @palewire in #3302
• return heat_index with temperature units by @rwalton91 in #3307
• Check for duplicate levels in isentropic_interpolation_as_dataset by @sgdecker in #3323
• Improve isentropic interpolation by @dopplershift in #3324

Bugs Fixed 🐛

• DOC: Add negative to equation in the advection docs by @dopplershift in #3153
• fix mlcape if parcel_start_pressure != bottom by @wx4stg in #3147
• METAR/Station Plot fixes by @dopplershift in #3297

Other Changes

• Bump the copyright year in the license file by @dopplershift in #3125
• Use xfail for test that doesn't fail on arm64. by @avalentino in #3150
• Add Complex Sounding Layout Example by @kylejgillett in #3161
• ENH: Move xdrlib inside metpy by @mgrover1 in #3117
• define dtype for station info lat-lon by @kgoebber in #3188
• extend declarative colorbar functionality by @kgoebber in #3181
• Create Advanced_Sounding_With_Complex_Layout.py by @kylejgillett in #3204
• Make tests pass on macOS M2 by @dopplershift in #3256
• MNT: Update link to ruff docs by @dopplershift in #3265
• Update state and county shapefiles by @dopplershift in #3293
• Cleanup warnings from tests by @dopplershift in #3255
• Provide alternate recipe to build docs by @sgdecker in #3330
• Update LI docs to reference and demonstrate mixed parcel usage by @dcamron in #3331
• Avoid pandas warning by @dopplershift in #3336

New Contributors

• @alexander-lakocy made their first contribution in #3118
• @blaylockbk made their first contribution in #3123
• @avalentino made their first contribution in #3150
• @wx4stg made their first contribution in #3131
• @kylejgillett made their first contribution in #3161
• @sec147 made their first contribution in #2952
• @palewire made their first contribution in #3302
• @rwalton91 made their first contribution in #3307

Full Changelog: v1.5.1...v1.6.0