Mid-Atlantic Regional Climate Summaries

The MARISA Seasonal Climate Impacts Summary and Outlook is a seasonal series produced by NOAA’s Mid-Atlantic Regional Integrated Sciences and Assessments program that details seasonal weather and climate variability and change in the Mid-Atlantic region. Explore the Climate Data Tools developed for the Climate Summary series.

  • A tree fallen on a house in Arlington, Virginia, on July 1, 2021. Photo by Michelle Basch / WTOP

    Mid-Atlantic Regional Climate Impacts Summary and Outlook: Summer 2021

    Sep 20, 2021

    Thunderstorms, tornadoes, and flash floods were among this summer's severe weather events in the Mid-Atlantic region. Read more about regional climate trends, and use the interactive tool to explore historic and future growing degree days.

  • Damage to trees caused by a tornado in Walters, Virginia. Photo by NWS Storm Survey

    Mid-Atlantic Regional Climate Impacts Summary and Outlook: Spring 2021

    Jun 21, 2021

    The Mid-Atlantic region experienced generally warm and dry weather in spring. Use the interactive tool to explore a case study of urban flooding in Pittsburgh, Pennsylvania during current and future climate conditions.

  • A neighborhood street after heavy snow in Falls Church, Virginia. Photo by amedved / Getty Images

    Mid-Atlantic Regional Climate Impacts Summary and Outlook: Winter 2020-2021

    Mar 17, 2021

    The winter season brought a historic snowstorm to northern parts of the watershed in December; while snow, ice and freezing rain in parts of Virginia and Maryland resulted in widespread power outages in February.

  • A bus drives through flooded roads in Ghent, Virginia, caused by Tropical Cyclone Sally, in September, 2020. Photo by Virginia Pilot / National Weather Service

    Mid-Atlantic Regional Climate Impacts Summary and Outlook: Fall 2020

    Dec 16, 2020

    Fall 2020 brought higher than normal temperatures, a wide range of precipitation patterns, and damaging conditions from Hurricane Isaias and Tropical Storm Fay. Use an interactive tool to explore the path of hurricanes reaching Mid-Atlantic states from 1980 to 2020.

  • Mid-Atlantic Regional Climate Impacts Summary and Outlook: Summer 2020

    Sep 17, 2020

    The Mid-Atlantic region experienced an active summer season with near-weekly severe storm events and the arrival of Tropical Storm Isaias. Warmer-than-normal conditions brought the hottest summer on record for Norfolk, Virginia, and Harrisburg and Williamsport, Pennsylvania.

  • Mid-Atlantic Regional Climate Impacts Summary and Outlook: Spring 2020

    Jun 19, 2020

    In this edition of the quarterly climate summary report, one of the warmest months of March on record was followed by one of the coldest months of April for some parts of the Mid-Atlantic Region, plus explore freeze-thaw cycles in a changing climate.

  • Chesapeake Bay Watershed Climate Impacts Summary and Outlook: Winter 2019-2020

    Mar 23, 2020

    An unusually mild winter saw low snowfall levels in the Chesapeake Bay Watershed, and Baltimore's first February without snow in more than a century of recordkeeping.

  • Chesapeake Bay Watershed Climate Impacts Summary and Outlook: Fall 2019

    Dec 17, 2019

    A warm and dry September and October turned to a colder-than-usual November in many locations in the Chesapeake Bay Watershed. September 2019 also ranked among the top ten all-time driest months for Baltimore, Maryland and Washington, D.C.

  • Chesapeake Bay Watershed Climate Impacts Summary and Outlook: Summer 2019

    Sep 18, 2019

    Summer 2019 brought flash flooding to some parts of the Chesapeake Bay Watershed, while other areas experienced as little as 50 percent of normal rainfall. July was also among the 10 warmest months on record for several locations.

  • Damage caused by a tornado in Charles City, Virginia, on April 19, 2019. Photo by National Weather Service

    Chesapeake Bay Watershed Climate Impacts Summary and Outlook: Spring 2019

    Jun 13, 2019

    The spring season saw almost 40 tornadoes touch down across the Chesapeake Bay region, including a record-breaking tally of 16 tornadoes in a single day in Virginia. Spring temperatures were above average for most of the watershed, and some areas experienced rainfall of up to 200 percent of historical averages.

  • Great Blue Heron on a frozen jetty on the Chesapeake Bay, photo by flownaksala / Getty Images

    Chesapeake Bay Watershed Climate Impacts Summary and Outlook: Winter 2018-2019

    Mar 25, 2019

    From December 2018 through February 2019, extreme weather events caused disruptions, delays, and damages within the Chesapeake Bay Watershed. A December snowstorm dropped up to 15.2 inches of snow on western and central Virginia, while a January storm caused more than 250 flight cancellations at Washington D.C.'s three main airports. In late January, a polar vortex resulted in cold, windy weather across the Mid-Atlantic region.

  • A crew works to repair a road destroyed by flooding on May 31, 2018 in Ellicott City, Maryland. On May 27 Ellicott City experienced a devastating flood for the second time in two years.

    Chesapeake Bay Watershed Climate Impacts Summary and Outlook for 2018

    Nov 27, 2018

    The first in a seasonal series, this summary draws information from other regional climate centers, news and weather information, regionally-specific climate datasets and the best available science on projected future climate impacts to present useful information for Chesapeake Bay Watershed policymakers, practitioners, residents, and community leaders. This edition also includes an in-depth analysis on multi-decadal changes in extreme precipitation events.