Supporting data for: A big chill: Examining an extremely sharp cold front from three perspectives

On 21–22 December 2022, an extremely strong cold front moved southward through the High Plains of the United States. The frontal passage was associated with rapid temperature decreases that rivaled or exceeded the largest that have been reported in the literature. In many locations in Wyoming and Colorado, the temperature dropped from above freezing to below zero Fahrenheit (below –17.8°C) in a few hours. High-resolution observations from an eddy covariance tower in Akron, Colorado revealed a 2-m air temperature drop of 13.8°C in 10 s and 15.4°C in 30 s, showing that this front effectively represented a discontinuity in temperature. Operational forecast models indicated the potential for a strong cold front up to 9 days in advance, but displayed considerable run-to-run variability and uncertainty in the timing of frontal passage. Forecasts from data-driven weather prediction models (trained using deep learning) were generally more accurate&nb..., This dataset includes the information required to reproduce the model simulation presented in the manuscript. This includes the namelist and initial and lateral boundary conditions for the WRF model simulation. Time series output at each model timestep is also included for the locations shown in the manuscript.
Also included are observations from the eddy covariance tower at the USDA research facility Akron, Colorado, provided by David Poss of USDA., , ## Supporting data for: A big chill: examining an extremely sharp cold front from three perspectives

[https://doi.org/10.5061/dryad.xksn02vrv](https://doi.org/10.5061/dryad.xksn02vrv)

## Description of the data and file structure

Included here are the files required to configure and reproduce the numerical simulation presented in this manuscript. (Full model output is not included owing to its large size.) The manuscript includes analysis of a simulation from the Weather Research and Forecasting model, version 4.3. The WRF model is available from the National Center for Atmospheric Research at: [https://www.mmm.ucar.edu/models/wrf](https://www.mmm.ucar.edu/models/wrf)

Also included is a file with the observations from the Akron, Colorado eddy covariance tower presented in the manuscript. Additional parameters, such as the wind direction using meteorological convention, and air temperature derived from the sonic temperature, are included along with the standard parameters described i...,