{ "retrieved_utc": "2026-09-16T01:18:01.259484+00:00", "boundary": "/data1/jennie/WISDOMM/SNOW/SNOTEL/USGS_WBD_HUC2_14_Upper_Colorado.geojson", "services": { "April_Snowpack": "https://services.arcgis.com/cJ9YHowT8TU7DUyn/ArcGIS/rest/services/CLM___Climate_Indicator_April_Snowpack__EPA_/FeatureServer", "Peak_Snowpack": "https://services.arcgis.com/cJ9YHowT8TU7DUyn/ArcGIS/rest/services/CLM___Climate_Indicator_Peak_Snowpack__EPA_/FeatureServer", "Snowpack_Season_Length": "https://services.arcgis.com/cJ9YHowT8TU7DUyn/ArcGIS/rest/services/Climate_Indicator_Snowpack_Season_Length__EPA_2022_/FeatureServer" }, "layers": [ { "indicator": "April_Snowpack", "layer": "CLIMATE_INDICATOR_APRIL_SNOWPACK", "status": "downloaded", "rows": 665, "file": "/data1/jennie/WISDOMM/SNOW/EPA/western_US/EPA_April_Snowpack_CLIMATE_INDICATOR_APRIL_SNOWPACK_western_US.csv", "service": "https://services.arcgis.com/cJ9YHowT8TU7DUyn/ArcGIS/rest/services/CLM___Climate_Indicator_April_Snowpack__EPA_/FeatureServer", "layer_id": 2, "description": "<p style=\"margin-top:0px; margin-bottom:0px; font-family:&quot;Avenir Next W01&quot;, &quot;Avenir Next W00&quot;, &quot;Avenir Next&quot;, Avenir, &quot;Helvetica Neue&quot;, sans-serif; font-size:16px;\"><a href=\"https://edg.epa.gov/metadata/catalog/search/resource/details.page?uuid=%7B75533E17-C91F-4D96-82C2-CB5CC977D78F%7D\" style=\"color:rgb(0, 121, 193); text-decoration-line:none; font-family:inherit;\"><font color=\"#000080\" style=\"font-family:inherit;\">Shared Enterprise Geodata and Services</font></a><span style=\"font-family:inherit;\"><font color=\"#000080\" style=\"font-family:inherit;\"> </font>(SEGS) provides an EPA-curated collection of recommended geodata assets that are nationally relevant and support the Agency\u2019s mission to protect human health and the environment. By connecting EPA users with curated datasets and promoting service reuse, SEGS aims to enhance information access, reduce data-storage costs, and improve the consistency and quality of data at the US EPA.</span></p><p style=\"margin-top:0px; margin-bottom:0px; font-family:&quot;Avenir Next W01&quot;, &quot;Avenir Next W00&quot;, &quot;Avenir Next&quot;, Avenir, &quot;Helvetica Neue&quot;, sans-serif; font-size:16px;\"><span style=\"font-family:inherit; font-size:12pt;\"><br /></span></p><p style=\"margin-top:0px; margin-bottom:0px; font-family:&quot;Avenir Next W01&quot;, &quot;Avenir Next W00&quot;, &quot;Avenir Next&quot;, Avenir, &quot;Helvetica Neue&quot;, sans-serif; font-size:16px;\"><span style=\"font-family:inherit; font-size:12pt;\">Developed by the U.S. EPA </span><a href=\"https://www.epa.gov/aboutepa/about-office-air-and-radiation-oar\" style=\"color:rgb(0, 121, 193); text-decoration-line:none; font-family:inherit; font-size:12pt;\"><font color=\"#000080\" style=\"font-family:inherit;\">Office of Air and Radiation</font></a><span style=\"font-family:inherit; font-size:12pt;\">, this content item depicts t</span><span style=\"font-family:inherit; font-size:12pt;\">rends in April snowpack in the western United States from 1955 to 2022, measured in terms of snow water equivalent. Blue circles represent increased snowpack; red circles represent a decrease. Data come from nearly 700 permanent measuring stations overseen by the U.S. Department of Agriculture's Natural Resources Conservation Service (NRCS) Water and Climate Center and the California Department of Water Resources. </span><span style=\"font-family:inherit; font-size:12pt;\">These data were supplemented with those published by </span><a href=\"https://doi.org/10.1175/BAMS-86-1-39\" style=\"color:rgb(0, 121, 193); text-decoration-line:none; font-family:inherit; font-size:12pt;\"><font color=\"#000080\" style=\"font-family:inherit;\">Mote and Sharp (2005) </font></a><span style=\"font-family:inherit; font-size:12pt;\">and </span><a href=\"https://www.nature.com/articles/s41612-018-0012-1.pdf\" style=\"color:rgb(0, 121, 193); text-decoration-line:none; font-family:inherit; font-size:12pt;\"><font color=\"#000080\" style=\"font-family:inherit;\">Mote et al. (2018)</font></a><span style=\"font-family:inherit; font-size:12pt;\">. For more information, please visit the U.S. EPA </span><a href=\"https://www.epa.gov/climate-indicators\" style=\"color:rgb(0, 121, 193); text-decoration-line:none; font-family:inherit; font-size:12pt;\"><font color=\"#000080\" style=\"font-family:inherit;\">climate change indicators webpage</font></a><span style=\"font-family:inherit; font-size:12pt;\">. These data and their corresponding metadata records can be downloaded from the </span><a href=\"https://edg.epa.gov/metadata/catalog/main/home.page\" style=\"color:rgb(0, 121, 193); text-decoration-line:none; font-family:inherit; font-size:12pt;\"><font color=\"#000080\" style=\"font-family:inherit;\">EPA Environmental Dataset Gateway </font></a><span style=\"font-family:inherit; font-size:12pt;\"><font color=\"#000080\" style=\"font-family:inherit;\">(EDG)</font>.</span></p>", "fields": [ { "name": "OBJECTID", "type": "esriFieldTypeOID", "alias": "OBJECTID", "sqlType": "sqlTypeOther", "nullable": false, "editable": false, "domain": null, "defaultValue": null }, { "name": "StationName", "type": "esriFieldTypeString", "alias": "StationName", "sqlType": "sqlTypeOther", "length": 8000, "nullable": true, "editable": true, "domain": null, "defaultValue": null }, { "name": "State", "type": "esriFieldTypeString", "alias": "State", "sqlType": "sqlTypeOther", "length": 8000, "nullable": true, "editable": true, "domain": null, "defaultValue": null }, { "name": "Lat", "type": "esriFieldTypeDouble", "alias": "Lat", "sqlType": "sqlTypeOther", "nullable": true, "editable": true, "domain": null, "defaultValue": null }, { "name": "Lon", "type": "esriFieldTypeDouble", "alias": "Lon", "sqlType": "sqlTypeOther", "nullable": true, "editable": true, "domain": null, "defaultValue": null }, { "name": "Elev", "type": "esriFieldTypeInteger", "alias": "Elev", "sqlType": "sqlTypeOther", "nullable": true, "editable": true, "domain": null, "defaultValue": null }, { "name": "Trend", "type": "esriFieldTypeDouble", "alias": "Trend", "sqlType": "sqlTypeOther", "nullable": true, "editable": true, "domain": null, "defaultValue": null }, { "name": "MeanSWE", "type": "esriFieldTypeDouble", "alias": "MeanSWE", "sqlType": "sqlTypeOther", "nullable": true, "editable": true, "domain": null, "defaultValue": null } ] }, { "indicator": "Peak_Snowpack", "layer": "CLIMATE_INDICATOR_PEAK_SNOWPACK", "status": "downloaded", "rows": 328, "file": "/data1/jennie/WISDOMM/SNOW/EPA/western_US/EPA_Peak_Snowpack_CLIMATE_INDICATOR_PEAK_SNOWPACK_western_US.csv", "service": "https://services.arcgis.com/cJ9YHowT8TU7DUyn/ArcGIS/rest/services/CLM___Climate_Indicator_Peak_Snowpack__EPA_/FeatureServer", "layer_id": 1, "description": "<p style=\"margin-top:0px; margin-bottom:0px; font-family:&quot;Avenir Next W01&quot;, &quot;Avenir Next W00&quot;, &quot;Avenir Next&quot;, Avenir, &quot;Helvetica Neue&quot;, sans-serif; font-size:16px;\"><a href=\"https://edg.epa.gov/metadata/catalog/search/resource/details.page?uuid=%7B75533E17-C91F-4D96-82C2-CB5CC977D78F%7D\" style=\"color:rgb(0, 121, 193); font-family:inherit;\"><span style=\"font-family:inherit;\"><span style=\"font-family:inherit;\"><font color=\"#000080\" style=\"font-family:inherit;\">Shared Enterprise Geodata and Services</font></span></span></a><span style=\"font-family:inherit;\"><font color=\"#000080\" style=\"font-family:inherit;\"> </font>(SEGS) provides an EPA-curated collection of recommended geodata assets that are nationally relevant and support the Agency\u2019s mission to protect human health and the environment. By connecting EPA users with curated datasets and promoting service reuse, SEGS aims to enhance information access, reduce data-storage costs, and improve the consistency and quality of data at the US EPA.</span></p><p style=\"margin-top:0px; margin-bottom:0px; font-family:&quot;Avenir Next W01&quot;, &quot;Avenir Next W00&quot;, &quot;Avenir Next&quot;, Avenir, &quot;Helvetica Neue&quot;, sans-serif; font-size:16px;\"><span style=\"font-family:inherit; font-size:12pt;\"><br /></span></p><p style=\"margin-top:0px; margin-bottom:0px; font-family:&quot;Avenir Next W01&quot;, &quot;Avenir Next W00&quot;, &quot;Avenir Next&quot;, Avenir, &quot;Helvetica Neue&quot;, sans-serif; font-size:16px;\"><span style=\"font-family:inherit; font-size:12pt;\">Developed by the U.S. EPA </span><a href=\"https://www.epa.gov/aboutepa/about-office-air-and-radiation-oar\" style=\"color:rgb(0, 121, 193); text-decoration-line:none; font-family:inherit; font-size:12pt;\"><font color=\"#000080\" style=\"font-family:inherit;\">Office of Air and Radiation</font></a><span style=\"font-family:inherit; font-size:12pt;\">, this content item depicts </span><span style=\"font-family:inherit; font-size:12pt;\">trends in the date during the year when snowpack reached its maximum across the western United States between 1982 and 2021, based on </span><span style=\"font-family:inherit; font-size:12pt;\">2021 data from U.S. Department of Agriculture's Natural Resources Conservation Service (NRCS). Peak snowpack analysis was adapted from </span><a href=\"https://doi.org/10.1175/JAMC-D-18-0150.1\" style=\"color:rgb(0, 121, 193); text-decoration-line:none; font-family:inherit; font-size:12pt;\"><font color=\"#000080\" style=\"font-family:inherit;\">Evan 2019</font></a><span style=\"font-family:inherit; font-size:12pt;\">. Blue triangles represent a shift to later timing; red triangles represent a shift to earlier timing. </span><span style=\"font-family:inherit; font-size:12pt;\">For more information, please visit the U.S. EPA </span><a href=\"https://www.epa.gov/climate-indicators\" style=\"color:rgb(0, 121, 193); text-decoration-line:none; font-family:inherit; font-size:12pt;\"><font color=\"#000080\" style=\"font-family:inherit;\">climate</font> <font color=\"#000080\" style=\"font-family:inherit;\">change indicators webpage</font></a><span style=\"font-family:inherit; font-size:12pt;\">. These data and their corresponding metadata records can be downloaded from the<font color=\"#000080\" style=\"font-family:inherit;\"> </font></span><a href=\"https://edg.epa.gov/metadata/catalog/main/home.page\" style=\"color:rgb(0, 121, 193); text-decoration-line:none; font-family:inherit; font-size:12pt;\"><font color=\"#000080\" style=\"font-family:inherit;\">EPA Environmental Dataset Gateway </font></a><span style=\"font-family:inherit; font-size:12pt;\">(EDG).</span></p><p style=\"margin-top:0px; margin-bottom:0px; font-family:&quot;Avenir Next W01&quot;, &quot;Avenir Next W00&quot;, &quot;Avenir Next&quot;, Avenir, &quot;Helvetica Neue&quot;, sans-serif; font-size:16px;\"><span style=\"font-family:inherit; font-size:12pt;\"><br /></span></p><p style=\"margin-top:0px; margin-bottom:0px; font-family:&quot;Avenir Next W01&quot;, &quot;Avenir Next W00&quot;, &quot;Avenir Next&quot;, Avenir, &quot;Helvetica Neue&quot;, sans-serif; font-size:16px;\"><span style=\"font-family:inherit; font-size:12pt;\">Evan, A. 2019. A new method to characterize changes in the seasonal cycle of snowpack. J. Appl. Meteorol. Clim. 58:131\u2013143</span></p>", "fields": [ { "name": "OBJECTID", "type": "esriFieldTypeOID", "alias": "OBJECTID", "sqlType": "sqlTypeOther", "nullable": false, "editable": false, "domain": null, "defaultValue": null }, { "name": "SiteName", "type": "esriFieldTypeString", "alias": "Site Name", "sqlType": "sqlTypeOther", "length": 8000, "nullable": true, "editable": true, "domain": null, "defaultValue": null }, { "name": "State", "type": "esriFieldTypeString", "alias": "State", "sqlType": "sqlTypeOther", "length": 8000, "nullable": true, "editable": true, "domain": null, "defaultValue": null }, { "name": "Latitude", "type": "esriFieldTypeDouble", "alias": "Latitude", "sqlType": "sqlTypeOther", "nullable": true, "editable": true, "domain": null, "defaultValue": null }, { "name": "Longitude", "type": "esriFieldTypeDouble", "alias": "Longitude", "sqlType": "sqlTypeOther", "nullable": true, "editable": true, "domain": null, "defaultValue": null }, { "name": "Elev", "type": "esriFieldTypeInteger", "alias": "Elevation", "sqlType": "sqlTypeOther", "nullable": true, "editable": true, "domain": null, "defaultValue": null }, { "name": "MagSWE", "type": "esriFieldTypeDouble", "alias": "MagSWE", "sqlType": "sqlTypeOther", "nullable": true, "editable": true, "domain": null, "defaultValue": null }, { "name": "TotChangDays", "type": "esriFieldTypeDouble", "alias": "Total Change (Days)", "sqlType": "sqlTypeOther", "nullable": true, "editable": true, "domain": null, "defaultValue": null } ] }, { "indicator": "Snowpack_Season_Length", "layer": "Climate Indicator Snowpack Season Length (EPA 2022)", "status": "downloaded", "rows": 352, "file": "/data1/jennie/WISDOMM/SNOW/EPA/western_US/EPA_Snowpack_Season_Length_Climate_Indicator_Snowpack_Season_Length_EPA_2022_western_US.csv", "service": "https://services.arcgis.com/cJ9YHowT8TU7DUyn/ArcGIS/rest/services/Climate_Indicator_Snowpack_Season_Length__EPA_2022_/FeatureServer", "layer_id": 1, "description": "

Shared Enterprise Geodata and Services (SEGS) provides an EPA-curated collection of recommended geodata assets that are nationally relevant and support the Agency\u2019s mission to protect human health and the environment. By connecting EPA users with curated datasets and promoting service reuse, SEGS aims to enhance information access, reduce data-storage costs, and improve the consistency and quality of data at the US EPA.

Developed by the U.S. EPA Office of Air and Radiation, this content item depicts trends in the length of the snowpack season across the western United States, in days. Blue circles show where the season has grown longer; red circles show where it has become shorter. For more information, please visit the U.S. EPA climate change indicators webpage. These data and their corresponding metadata records can be downloaded from the EPA Environmental Dataset Gateway (EDG).

USDA Natural Resources Conservation Service. 2022. Snow telemetry (SNOTEL) and snow course data and products. Accessed May 2022. www.wcc.nrcs.usda.gov/snow/index.html

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