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.on("mouseover", function (e, d) { let thisDiv = d3.select(this).data()[0]; if (thisDiv !== mutable thisDiv) mutable thisDiv = thisDiv; d3.select(this).style("stroke-width", 3).style("stroke", "#fee004"); const thisSt = thisDiv.properties.STUSPS; if(thisSt !== "HI") { const message = direction(+thisDiv.properties.slope); tooltip.style("visibility", "visible").html(`The average spring temperature in ${ thisDiv.properties.NAMELSAD}, ${thisDiv.properties.STUSPS} ${message} ${+thisDiv.properties.slope}°F since 1970.`); } else { tooltip.style("visibility", "visible").html(`Average spring temperatures for ${thisDiv.properties.NAMELSAD}, HI were not available for the full study period.`); } }) .on("mousemove", function (e, d) { return tooltip .style("top", e.pageY - 10 + "px") .style("left", e.pageX + 10 + "px"); }) .on("mouseout", function (e, d) { if (mutable thisDiv) mutable thisDiv = null; d3.select(this).style("stroke-width", 0.15).style("stroke", "black"); tooltip.style("visibility", 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Package","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","output":"","database":"$undefined"},{"id":3,"value":"

Change in Average Spring Temperature (°F) by County, 1970-2024

","pinned":false,"hidden":false,"mode":"html","author":"$undefined","summary":"$undefined","output":"","database":"$undefined"},{"id":12,"value":"Meteorological spring, which starts March 1, is warming across the U.S., affecting allergy seasons, wildfire risk, and snow-fed water supplies. Read more about the impacts of warming spring temperatures in Climate Central's 2025 Spring Package.\n
","pinned":false,"hidden":false,"mode":"html","author":"$undefined","summary":"$undefined","output":"","database":"$undefined"},{"id":24,"value":"$2e","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":32,"value":"

${DOM.download(\n FileAttachment(\"2025SpringPackage_DataDownload_Map.csv\").blob(),\n FileAttachment(\"2025SpringPackage_DataDownload_Map.csv\").name,\n \"Download Data\"\n)}

","pinned":false,"hidden":false,"mode":"html","author":"$undefined","summary":"$undefined","output":"","database":"$undefined"},{"id":25,"value":"

Want to embed this map on another website?

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","pinned":false,"hidden":false,"mode":"html","author":"$undefined","summary":"$undefined","output":"","database":"$undefined"},{"id":476,"value":"

This analysis was made possible thanks to open source data provided by NOAA/NCEI.

","pinned":false,"hidden":false,"mode":"html","author":"$undefined","summary":"$undefined","output":"","database":"$undefined"},{"id":33,"value":"Methodology: Monthly temperature data for U.S. counties were obtained from NOAA/NCEI's nClimDiv dataset. This data can also be downloaded for individual counties via NCEI's Climate at a Glance. Data for Hawaiian counties were not available for the same time period and were not included in the analysis. While Connecticut has recently switched from counties to planning regions, NCEI does not yet have data for the new geographies. Until that changes, we will continue to use the county data available for Connecticut. For any questions about this interactive, please contact ktrudeau@climatecentral.org.","pinned":false,"hidden":false,"mode":"html","author":"$undefined","summary":"$undefined","output":"","database":"$undefined"},{"id":184,"value":"---","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","output":"","database":"$undefined"},{"id":553,"value":"---","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","output":"","database":"$undefined"},{"id":557,"value":"---","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","output":"","database":"$undefined"},{"id":35,"value":"$2f","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":39,"value":"viewof legend = htl.html`

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