Historical Change in Date of Last Freeze and First Warm Day
This tool is an interactive map that provides county-level estimates of historic (1981–2019) annual dates of last frost, as well as dates of first 70°F and first 80°F maximum temperatures.
This tool is excerpted from Chesapeake Bay Watershed Climate Impacts Summary and Outlook for Spring 2020.
More information on RCP 4.5 can be found in Allison M. Thomson, Katherine V. Calvin, Steven J. Smith, G. Page Kyle, April Volke, Pralit Patel, Sabrina Delgado-Arias, Ben Bond-Lamberty, Marshall A. Wise, Leon E. Clarke, and James A. Edmonds, “RCP4.5: A Pathway for Stabilization of Radiative Forcing by 2100,” Climatic Change, Vol. 109, 2011, pp. 77–94. As of June 8, 2020: https://doi.org/10.1007/s10584-011-0151-4Return to text ⤴
More information on RCP 8.5 can be found in Keywan Riahi, Shilpa Rao, Volker Krey, Cheolhung Cho, Vadim Chirkov, Guenther Fischer, Georg Kindermann, Nebojsa Nakicenovic, and Peter Rafaj, “RCP 8.5—A Scenario of Comparatively High Greenhouse Gas Emissions,” Climatic Change, Vol. 109, 2011, pp. 33–57. As of June 8, 2020: https://doi.org/10.1007/s10584-011-0149-y Return to text ⤴
More information on RCP 4.5 can be found in Thomson et al., 2011. Return to text ⤴
More information on RCP 8.5 can be found in: Riahi et al., 2011. Return to text ⤴