This data release contains SnowModel snow evolution simulation output on a 100-meter (m) geospatial grid for a 311 kilometer (km) × 300 km model domain in Colorado, United States, encompassing the Colorado and Gunnison River Basin headwaters in the Upper Colorado River Basin. Weather Research and Forecasting (WRF) Model convection-permitting and orography-resolving (4-km grid spacing) regional climate simulations provided the atmospheric forcing conditions to drive SnowModel in both a current and future climate scenario. A pair of continuous 13-water-year (2001-13) WRF model simulations was utilized: (1) a current climate control (CTL) simulation forced using ERA-Interim reanalysis, and (2) a future climate simulation using the pseudo-global-warming (PGW) method that uses the ERA-Interim reanalysis for the same period as (1) and adds an ensemble mean climate delta from 100 years in the future for the most extreme Representative Concentration Pathway (RCP) 8.5 scenario. The six SnowModel simulated outputs provided separately as child items in this data release include (1) air temperature (tair), (2) precipitation (prec), (3) precipitation amount falling as snow (spre), (4) snow water equivalent (swed), (5) liquid water supplied to the soil-snow interface from snowmelt (smlt), and (6) liquid water supplied to the soil-snow or soil-air interface either from snowmelt or rainfall (roff). The simulations used to produce these outputs were conducted on a 100-m geospatial grid. Land cover information (file vege.asc) for the simulation was provided by the 2010 North American Land Change Monitoring System and elevation information (file topo.asc) was provided by the U.S. Geological Survey National Elevation Dataset.

This data release contains SnowModel snow evolution simulation output from water years 2022 to 2023 (October 1, 2021, through September 30, 2023) on a 100-meter (m) geospatial grid for a 3 kilometer (km) × 2 km model domain near Coal Creek off Coal Bank Pass in the San Juan Mountains in southwest Colorado, USA. The three quantities simulated for this release were snow water equivalent for the standard model configuration (swe_standard), snow water equivalent for an open canopy model configuration (swe_open), and incoming shortwave radiation for the open canopy model configuration (qsin_open). The simulation used to produce these outputs was forced using meteorology from the National Land Data Assimilation System (NLDAS-2). Land cover information for the standard simulation was provided by the North American Land Change Monitoring System and land cover for the open canopy model configuration was set to the grassland land cover type. Elevation information was provided by the U.S. Geological Survey (USGS) National Elevation Dataset. This research was funded by the Department of the Interior South Central Climate Adaptation Science Center.

This data release contains output from a numerical snow simulation for a 65 kilometer (km) × 81 km model domain in parts of Montana and Wyoming, United States, encompassing the Gallatin River watershed upstream of the U.S. Geological Survey streamgage near Gallatin Gateway, MT (06043500). Weather Research and Forecasting (WRF) Model convection-permitting and orography-resolving regional climate simulations with 4-km horizontal resolution provided the atmospheric forcing conditions to SnowModel in both a historical and future climate scenario. Two continuous, 13-water-year (2001-2013) WRF model simulations were utilized: (1) a historical climate control (CTL) simulation forced using ERA-Interim reanalysis, and (2) a future climate simulation using the pseudo-global-warming (PGW) method that uses the ERA-Interim reanalysis for the same period as (1) and adds an ensemble mean climate delta from the end of the century (2071-2100) for the most extreme 5th Coupled Model Intercomparison Project (CMIP5) Representative Concentration Pathway (RCP) 8.5 scenario. The ten SnowModel simulated outputs provided in this data release include (1) air temperature (tair), (2) precipitation (prec), (3) solid precipitation (spre), (4) liquid precipitation (rpre), (5) liquid water supplied to the soil-snow interface from snowmelt (smlt), (6) snow sublimination (ssub), (7) liquid water supplied to the soil-snow or soil-air interface either from snowmelt or rainfall (roff), (8) snow depth (snod), (9) snow water equivalent depth (swed), and (10) snow density (sden). The simulations used to produce these outputs were conducted on a 30-m geospatial grid. Land cover information for the simulation was provided by the 2010 North American Land Change Monitoring System and elevation information was provided by the U.S. Geological Survey National Elevation Dataset. The historical (CTL) and future climate (PGW) simulations were conducted using annual precipitation bias correction surfaces (prec_cf), which were computed by comparing SnowModel-simulated CTL snow water equivalent to Natural Resources Conservation Service snow telemetry station (SNOTEL) observations to generate a precipitation correction that was interpolated using SnowModel.

This data release contains output from a numerical snow simulation for a 65 kilometer (km) × 81 km model domain in parts of Montana and Wyoming, United States, encompassing the Gallatin River watershed upstream of the U.S. Geological Survey streamgage near Gallatin Gateway, MT (06043500). Weather Research and Forecasting (WRF) Model convection-permitting and orography-resolving regional climate simulations with 4-km horizontal resolution provided the atmospheric forcing conditions to SnowModel in both a historical and future climate scenario. Two continuous, 13-water-year (2001-2013) WRF model simulations were utilized: (1) a historical climate control (CTL) simulation forced using ERA-Interim reanalysis, and (2) a future climate simulation using the pseudo-global-warming (PGW) method that uses the ERA-Interim reanalysis for the same period as (1) and adds an ensemble mean climate delta from the end of the century (2071-2100) for the most extreme 5th Coupled Model Intercomparison Project (CMIP5) Representative Concentration Pathway (RCP) 8.5 scenario. The ten SnowModel simulated outputs provided in this data release include (1) air temperature (tair), (2) precipitation (prec), (3) solid precipitation (spre), (4) liquid precipitation (rpre), (5) liquid water supplied to the soil-snow interface from snowmelt (smlt), (6) snow sublimination (ssub), (7) liquid water supplied to the soil-snow or soil-air interface either from snowmelt or rainfall (roff), (8) snow depth (snod), (9) snow water equivalent depth (swed), and (10) snow density (sden). The simulations used to produce these outputs were conducted on a 30-m geospatial grid. Land cover information for the simulation was provided by the 2010 North American Land Change Monitoring System and elevation information was provided by the U.S. Geological Survey National Elevation Dataset. The historical (CTL) and future climate (PGW) simulations were conducted using annual precipitation bias correction surfaces (prec_cf), which were computed by comparing SnowModel-simulated CTL snow water equivalent to Natural Resources Conservation Service snow telemetry station (SNOTEL) observations to generate a precipitation correction that was interpolated using SnowModel.

This data release supports the study by Sexstone and others (2020) and contains simulation output from SnowModel (Liston and Elder, 2006), a well-validated process-based snow modeling system. Simulations are for water years 1984 through 2017 (October 1, 1983 through September 30, 2017) across a 11,200 square kilometer model domain in the San Juan Mountains of southwestern Colorado, United States that encompasses the Rio Grande Basin headwaters (HUC8 13010001). This data release also contains supporting field-based snow and meteorological station observations collected within the model domain during water years 2016 and 2017 that were used to evaluate SnowModel simulations. Sexstone and others (2020) provide details and summarize findings from the SnowModel simulations and supporting observations. SnowModel simulation output provided in this data release are stored in NetCDF files that have spatial (100-meter [m] grid resolution) and temporal (yearly) dimensions. Simulated SnowModel annual snow metrics (water years 1984 through 2017) in the attached NetCDF files include: mean winter (1 October to 31 May) air temperature (T; degrees Celsius [°C]), cumulative winter precipitation (P; millimeters [mm]), peak snow water equivalent (SWE; mm), SWE:P (ratio of peak SWE to winter P; m/m), snow-covered days (days with snow on the ground; days), total snowmelt (surface-water input into the soil that occurs when SWE greater than [>] 0; mm), snowmelt rate (rate the snow melts from peak SWE to melt out; millimeter per day [mm/day]), SM50 (water year day following peak SWE when half of snowpack has melted), peak SWE timing (water year day when peak SWE occurs), melt-out timing (water year day when snow melt out occurs), sublimation (total snow sublimation including surface, canopy, and blowing snow components; mm), sublimation:P (total snow sublimation to winter P ratio; m/m), 1 March SWE (mm), 1 April SWE (mm), 1 May SWE (mm), and 1 June SWE (mm). Supporting observations are provided in this data release in comma separated value (csv) files. Supporting meteorological station observations from three meteorological stations (daily mean values for the previous day) include: air temperature (°C), relative humidity (percent [%]), wind speed (meter per second [m/s]), incoming shortwave radiation (watts per meter squared [W m-2]), net radiation (W m-2), and albedo. Supporting field-based snow observations collected at 73 locations at a daily temporal dimension include: SWE (mm), standard deviation of SWE (mm), snow depth (m), and standard deviation of snow depth (m). An inventory and description of each of the files attached to the data release is provided below. Inventory of data release: URGB_SnowModel_study.xml: FGDC-compliant metadata file for the data release files. melt_doy.nc: NetCDF file of annual melt-out timing (water year day when snow melt out occurs) from SnowModel output . melt_rate.nc: NetCDF file of annual snowmelt rate (rate the snow melts from peak SWE to melt out; mm/day) from SnowModel output. peak_swe.nc: NetCDF file of annual peak SWE (mm) from SnowModel output. peak_swe_doy.nc: NetCDF file of annual peak SWE timing (water year day when peak SWE occurs) from SnowModel output. SM50.nc: NetCDF file of annual SM50 (water year day following peak SWE when half of snowpack has melted) from SnowModel output. snow_days.nc: NetCDF file of annual snow-covered days (days with snow on the ground) from SnowModel output. sub_p.nc: NetCDF file of annual sublimation:P (total snow sublimation to winter P ratio; m/m) from SnowModel output. sum_P_may.nc: NetCDF file of annual cumulative winter P (mm) from SnowModel output. sum_snow_RO.nc: NetCDF file of annual total snowmelt (surface-water input into the soil that occurs when SWE > 0; mm) from SnowModel output. sum_sub.nc: NetCDF file of annual sublimation (total snow sublimation including surface, canopy, and blowing snow components; mm) from SnowModel output. swe_p.nc: NetCDF file of annual

This data release supports the study by Sexstone and others (2020) and contains simulation output from SnowModel (Liston and Elder, 2006), a well-validated process-based snow modeling system. Simulations are for water years 1984 through 2017 (October 1, 1983 through September 30, 2017) across a 11,200 square kilometer model domain in the San Juan Mountains of southwestern Colorado, United States that encompasses the Rio Grande Basin headwaters (HUC8 13010001). This data release also contains supporting field-based snow and meteorological station observations collected within the model domain during water years 2016 and 2017 that were used to evaluate SnowModel simulations. Sexstone and others (2020) provide details and summarize findings from the SnowModel simulations and supporting observations. SnowModel simulation output provided in this data release are stored in NetCDF files that have spatial (100-meter [m] grid resolution) and temporal (yearly) dimensions. Simulated SnowModel annual snow metrics (water years 1984 through 2017) in the attached NetCDF files include: mean winter (1 October to 31 May) air temperature (T; degrees Celsius [°C]), cumulative winter precipitation (P; millimeters [mm]), peak snow water equivalent (SWE; mm), SWE:P (ratio of peak SWE to winter P; m/m), snow-covered days (days with snow on the ground; days), total snowmelt (surface-water input into the soil that occurs when SWE greater than [>] 0; mm), snowmelt rate (rate the snow melts from peak SWE to melt out; millimeter per day [mm/day]), SM50 (water year day following peak SWE when half of snowpack has melted), peak SWE timing (water year day when peak SWE occurs), melt-out timing (water year day when snow melt out occurs), sublimation (total snow sublimation including surface, canopy, and blowing snow components; mm), sublimation:P (total snow sublimation to winter P ratio; m/m), 1 March SWE (mm), 1 April SWE (mm), 1 May SWE (mm), and 1 June SWE (mm). Supporting observations are provided in this data release in comma separated value (csv) files. Supporting meteorological station observations from three meteorological stations (daily mean values for the previous day) include: air temperature (°C), relative humidity (percent [%]), wind speed (meter per second [m/s]), incoming shortwave radiation (watts per meter squared [W m-2]), net radiation (W m-2), and albedo. Supporting field-based snow observations collected at 73 locations at a daily temporal dimension include: SWE (mm), standard deviation of SWE (mm), snow depth (m), and standard deviation of snow depth (m). An inventory and description of each of the files attached to the data release is provided below. Inventory of data release: URGB_SnowModel_study.xml: FGDC-compliant metadata file for the data release files. melt_doy.nc: NetCDF file of annual melt-out timing (water year day when snow melt out occurs) from SnowModel output . melt_rate.nc: NetCDF file of annual snowmelt rate (rate the snow melts from peak SWE to melt out; mm/day) from SnowModel output. peak_swe.nc: NetCDF file of annual peak SWE (mm) from SnowModel output. peak_swe_doy.nc: NetCDF file of annual peak SWE timing (water year day when peak SWE occurs) from SnowModel output. SM50.nc: NetCDF file of annual SM50 (water year day following peak SWE when half of snowpack has melted) from SnowModel output. snow_days.nc: NetCDF file of annual snow-covered days (days with snow on the ground) from SnowModel output. sub_p.nc: NetCDF file of annual sublimation:P (total snow sublimation to winter P ratio; m/m) from SnowModel output. sum_P_may.nc: NetCDF file of annual cumulative winter P (mm) from SnowModel output. sum_snow_RO.nc: NetCDF file of annual total snowmelt (surface-water input into the soil that occurs when SWE > 0; mm) from SnowModel output. sum_sub.nc: NetCDF file of annual sublimation (total snow sublimation including surface, canopy, and blowing snow components; mm) from SnowModel output. swe_p.nc: NetCDF file of annual

This data release supports the study by Sexstone and others (2020) and contains simulation output from SnowModel (Liston and Elder, 2006), a well-validated process-based snow modeling system. Simulations are for water years 1984 through 2017 (October 1, 1983 through September 30, 2017) across a 11,200 square kilometer model domain in the San Juan Mountains of southwestern Colorado, United States that encompasses the Rio Grande Basin headwaters (HUC8 13010001). This data release also contains supporting field-based snow and meteorological station observations collected within the model domain during water years 2016 and 2017 that were used to evaluate SnowModel simulations. Sexstone and others (2020) provide details and summarize findings from the SnowModel simulations and supporting observations. SnowModel simulation output provided in this data release are stored in NetCDF files that have spatial (100-meter [m] grid resolution) and temporal (yearly) dimensions. Simulated SnowModel annual snow metrics (water years 1984 through 2017) in the attached NetCDF files include: mean winter (1 October to 31 May) air temperature (T; degrees Celsius [°C]), cumulative winter precipitation (P; millimeters [mm]), peak snow water equivalent (SWE; mm), SWE:P (ratio of peak SWE to winter P; m/m), snow-covered days (days with snow on the ground; days), total snowmelt (surface-water input into the soil that occurs when SWE greater than [>] 0; mm), snowmelt rate (rate the snow melts from peak SWE to melt out; millimeter per day [mm/day]), SM50 (water year day following peak SWE when half of snowpack has melted), peak SWE timing (water year day when peak SWE occurs), melt-out timing (water year day when snow melt out occurs), sublimation (total snow sublimation including surface, canopy, and blowing snow components; mm), sublimation:P (total snow sublimation to winter P ratio; m/m), 1 March SWE (mm), 1 April SWE (mm), 1 May SWE (mm), and 1 June SWE (mm). Supporting observations are provided in this data release in comma separated value (csv) files. Supporting meteorological station observations from three meteorological stations (daily mean values for the previous day) include: air temperature (°C), relative humidity (percent [%]), wind speed (meter per second [m/s]), incoming shortwave radiation (watts per meter squared [W m-2]), net radiation (W m-2), and albedo. Supporting field-based snow observations collected at 73 locations at a daily temporal dimension include: SWE (mm), standard deviation of SWE (mm), snow depth (m), and standard deviation of snow depth (m). An inventory and description of each of the files attached to the data release is provided below. Inventory of data release: URGB_SnowModel_study.xml: FGDC-compliant metadata file for the data release files. melt_doy.nc: NetCDF file of annual melt-out timing (water year day when snow melt out occurs) from SnowModel output . melt_rate.nc: NetCDF file of annual snowmelt rate (rate the snow melts from peak SWE to melt out; mm/day) from SnowModel output. peak_swe.nc: NetCDF file of annual peak SWE (mm) from SnowModel output. peak_swe_doy.nc: NetCDF file of annual peak SWE timing (water year day when peak SWE occurs) from SnowModel output. SM50.nc: NetCDF file of annual SM50 (water year day following peak SWE when half of snowpack has melted) from SnowModel output. snow_days.nc: NetCDF file of annual snow-covered days (days with snow on the ground) from SnowModel output. sub_p.nc: NetCDF file of annual sublimation:P (total snow sublimation to winter P ratio; m/m) from SnowModel output. sum_P_may.nc: NetCDF file of annual cumulative winter P (mm) from SnowModel output. sum_snow_RO.nc: NetCDF file of annual total snowmelt (surface-water input into the soil that occurs when SWE > 0; mm) from SnowModel output. sum_sub.nc: NetCDF file of annual sublimation (total snow sublimation including surface, canopy, and blowing snow components; mm) from SnowModel output. swe_p.nc: NetCDF file of annual

This data release includes simulation output from SnowModel (Liston and Elder, 2006), a well-validated process-based snow modeling system, and supporting snow, meteorological, and streamflow observations from the water years 2011 through 2015 (October 1, 2010, through September 30, 2015) across a 3,600 square kilometer model domain in the north-central Colorado Rocky Mountains. For each water year, SnowModel simulations were completed for a (1) baseline simulation, (2) bark-beetle disturbance condition simulation, (3) 2016 - 2035 future climate condition simulation (S1), and (4) 2046 - 2065 future climate condition simulation (S2). Sexstone and others (2018) provide details and summarize findings from each of the SnowModel simulations. SnowModel simulation output is stored in NetCDF files that have spatial (100-m grid resolution) and temporal (daily) dimensions. Simulated SnowModel outputs in the attached .zip folders include: snow water equivalent (m), snow depth (m), surface sublimation (m/day), canopy sublimation (m/day), blowing sublimation (m/day), cumulative blowing snow transport (m), precipitation (m/day), air temperature (C), surface temperature (C), relative humidity (%), wind speed (m/s), wind direction (degrees from north). Supporting station observations that were collected and used to evaluate SnowModel simulations are also provided in this data release in comma separated value files. Supporting station observations in the attached .zip folders include: daily mean snow sublimation (mm/day), mean daily snow depth (m), mean hourly air temperature (C), mean hourly relative humidity (%), mean hourly wind speed (m/s), and mean daily streamflow normalized to watershed area (mm). An inventory and description of each of the .zip folders attached to the data release are provided below. The purpose of the model simulations and supporting observations provided in this data release are to improve understanding of the importance of snow sublimation to the water balance of this region (Sexstone and others, 2018). Inventory of data release: Model_Runs_WYxxxx.zip (5 zipped folders): Baseline model simulation output (.nc) and associated FGDC-compliant metadata file (.xml) for water years 2011 through 2015. Each of the 5 zipped folders are labeled with the given water year (WY). Model_Runs_Beetle_WYxxxx.zip (5 zipped folders): Bark-beetle disturbance condition model simulation output (.nc) and associated FGDC-compliant metadata file (.xml) for water years 2011 through 2015. Each of the 5 zipped folders are labeled with the given water year (WY). Model_Runs_Climate_WYxxxx_s1.zip (5 zipped folders): Future climate condition (2016 – 2035) simulation (S1) output (.nc) and associated FGDC-compliant metadata file (.xml) for water years 2011 through 2015. Each of the 5 zipped folders are labeled with the given water year (WY). Model_Runs_Climate_WYxxxx_s2.zip (5 zipped folders): Future climate condition (2046 – 2065) simulation (S2) output (.nc) and associated FGDC-compliant metadata file (.xml) for water years 2011 through 2015. Each of the 5 zipped folders are labeled with the given water year (WY). Supporting_observations_WY2011-WY2015.zip (1 zipped folder) Supporting observations of station observations (.csv) and and associated FGDC-compliant metadata file (.xml) for water years 2011 through 2015. References: Liston, G.E., and Elder, K., 2006, A distributed snow-evolution modeling system (SnowModel): Journal of Hydrometeorology, v. 7, no. 6, p. 1259-1276. Sexstone, G.A., Clow, D.W., Fassnacht, S.R., Liston, G.E., Hiemstra, C.A., Knowles, J.F., and Penn, C.A., 2018, Snow sublimation in mountain environments and its sensitivity to forest disturbance and climate warming, Water Resources Research [URL].

This data release includes simulation output from SnowModel (Liston and Elder, 2006), a well-validated process-based snow modeling system, and supporting snow, meteorological, and streamflow observations from the water years 2011 through 2015 (October 1, 2010, through September 30, 2015) across a 3,600 square kilometer model domain in the north-central Colorado Rocky Mountains. For each water year, SnowModel simulations were completed for a (1) baseline simulation, (2) bark-beetle disturbance condition simulation, (3) 2016 - 2035 future climate condition simulation (S1), and (4) 2046 - 2065 future climate condition simulation (S2). Sexstone and others (2018) provide details and summarize findings from each of the SnowModel simulations. SnowModel simulation output is stored in NetCDF files that have spatial (100-m grid resolution) and temporal (daily) dimensions. Simulated SnowModel outputs in the attached .zip folders include: snow water equivalent (m), snow depth (m), surface sublimation (m/day), canopy sublimation (m/day), blowing sublimation (m/day), cumulative blowing snow transport (m), precipitation (m/day), air temperature (C), surface temperature (C), relative humidity (%), wind speed (m/s), wind direction (degrees from north). Supporting station observations that were collected and used to evaluate SnowModel simulations are also provided in this data release in comma separated value files. Supporting station observations in the attached .zip folders include: daily mean snow sublimation (mm/day), mean daily snow depth (m), mean hourly air temperature (C), mean hourly relative humidity (%), mean hourly wind speed (m/s), and mean daily streamflow normalized to watershed area (mm). An inventory and description of each of the .zip folders attached to the data release are provided below. The purpose of the model simulations and supporting observations provided in this data release are to improve understanding of the importance of snow sublimation to the water balance of this region (Sexstone and others, 2018). Inventory of data release: Model_Runs_WYxxxx.zip (5 zipped folders): Baseline model simulation output (.nc) and associated FGDC-compliant metadata file (.xml) for water years 2011 through 2015. Each of the 5 zipped folders are labeled with the given water year (WY). Model_Runs_Beetle_WYxxxx.zip (5 zipped folders): Bark-beetle disturbance condition model simulation output (.nc) and associated FGDC-compliant metadata file (.xml) for water years 2011 through 2015. Each of the 5 zipped folders are labeled with the given water year (WY). Model_Runs_Climate_WYxxxx_s1.zip (5 zipped folders): Future climate condition (2016 – 2035) simulation (S1) output (.nc) and associated FGDC-compliant metadata file (.xml) for water years 2011 through 2015. Each of the 5 zipped folders are labeled with the given water year (WY). Model_Runs_Climate_WYxxxx_s2.zip (5 zipped folders): Future climate condition (2046 – 2065) simulation (S2) output (.nc) and associated FGDC-compliant metadata file (.xml) for water years 2011 through 2015. Each of the 5 zipped folders are labeled with the given water year (WY). Supporting_observations_WY2011-WY2015.zip (1 zipped folder) Supporting observations of station observations (.csv) and and associated FGDC-compliant metadata file (.xml) for water years 2011 through 2015. References: Liston, G.E., and Elder, K., 2006, A distributed snow-evolution modeling system (SnowModel): Journal of Hydrometeorology, v. 7, no. 6, p. 1259-1276. Sexstone, G.A., Clow, D.W., Fassnacht, S.R., Liston, G.E., Hiemstra, C.A., Knowles, J.F., and Penn, C.A., 2018, Snow sublimation in mountain environments and its sensitivity to forest disturbance and climate warming, Water Resources Research [URL].

This data release includes SnowModel output for three headwater study areas in Colorado at seven spatial resolutions and from two forcing datasets over a 40-year period from water year 1980 to 2019. The resolutions include 30 m, 50 m, 100 m, 150 m, 250 m, 500 m, and 1,000 m. The model was run with a 3-hour temporal resolution from September 1, 1980 to August 31, 2019. Two meteorology forcing datasets were used, including National Land Data Assimilation System-2 at 1/8th degree (about 12 km) resolution data and the Weather Research and Forecasting model data at 4 km resolution. Output variables include snow-water equivalent depth (swed), runoff (roff), air temperature (tair), snow-covered area (sca), snow depth (snod), precipitation (prec), and liquid precipitation (rpre). Additionally, topography and vegetation datasets are included for each combination of unique domain and resolution, as well as the model parameterization file for a representative year. The data are organized by water year (WY) for each forcing type. For example, 'XXXX_wyYYYY.zip', where XXXX is either NLDAS2 or WRFCTL, and YYYY is the water year, with each water year including subdirectories for each of the three headwater study areas ('ER', 'FR', and 'SB' for East River, Fraser River, and Senator Beck, respectively). Each headwater study area subdirectory contains a subdirectory for each spatial resolution ('30', '50', '100', '150', '250', '500', '1000'), and each of those subdirectories contains NetCDF files for the seven variables modeled at that resolution. For example,'SA_RES_VAR_wyYYYY.nc', where SA is one of the three headwater study areas, RES is one of the seven spatial resolutions, VAR is one of the seven output variables, and YYYY is the water year.