![]() This second round was of nearly equal intensity to the first, and had equal or greater impacts. Total rainfall estimates reached six inches by 5:15pm just south of Old Town Ellicott City, and in the Oella and Catonsville areas.Ī second round of heavy rain pushed across Ellicott City between 5:00pm and 6:00pm, with the heaviest rain occurring between 5:20pm and 5:50pm. The highest water - up to the top of the first floor of buildings - was observed between 4:40pm and 5:00pm, then water levels began to recede somewhat.Īt the time of this highest water (4:40pm), a Flash Flood Emergency was declared by the National Weather Service, in coordination with Howard County Emergency Management, due to the ongoing catastrophic flooding, and the heaviest rain was still falling at that point. Remarkably, conditions continued to worsen throughout the Ellicott City area between 4:30pm and 5:00pm as the rain shifted just south of the city, with overland flooding occurring in West End as well as even more significant water coming down the Tiber and through both Tiber Alley and the buildings on the south side of Main Street. Two minutes later, at 4:20pm, the water level in the Tiber further increased, exceeding the capacity of the channel in the 8100 block of Main Street and near Tiber Alley, sending water both into nearby structures and down the Alley onto Main Street.Īs initial reports of this more significant water came in to the National Weather Service, the Flood Warning was upgraded to a Flash Flood Warning, at 4:26pm. This heavy rain caused a major rise in the New Cut Branch ( click here for an annotated map of the watershed), and the added water pushed the Tiber River out of its banks at 4:18pm near Tiber Alley. Video shows Main Street was still passable until around 4:20pm.īetween 4:00pm and 4:30pm, the heavy rain persisted, quickly dropping an estimated two inches of rain in a band just south of Ellicott City to near Catonsville. At 4:00pm, video footage showed a small amount of flowing water near the curbs on Main Street in Ellicott City, with rain increasing in intensity. This initial rain pushed south of Ellicott City after causing an estimated 1.5 to 2 inches of rain, but by 4:00pm, had built back over both Ellicott City and Catonsville. Just as the rain began, a Flood Warning was issued at 3:19pm for portions of Howard County, Baltimore County, and Baltimore City, including Ellicott City, Catonsville, Dundalk, and Baltimore City, all of which experienced significant flooding during this event. ![]() Social Media slide showing the Flash Flood Watch. On Sunday morning, May 27th, a Flash Flood Watch was issued for the Baltimore/Washington corridor, highlighting the potential for showers and thunderstorms capable of producing heavy rain during the afternoon and evening. The National Weather Service (NWS) began highlighting the potential for flooding in the Hazardous Weather Outlook (link) beginning on Friday morning, May 25th: Thunderstorms capable of producing locally heavy rain may lead to isolated incidents of ![]() Some roads were washed out and land erosion and localized landslides were reported. Hundreds of people were addressed by first responders during the event, with around 1100 separate 911 calls reported in to Howard County. ![]() ![]() Many buildings were damaged and dozens of vehicles experienced flood damage. One person - 39-year old Eddison Hermond, died while trying to help a woman who was seeking assistance after the first flood wave. The heavy rainfall, between 6 and 12 inches in the heaviest band, caused catastrophic damage, especially in Historic Ellicott City. Ellicott City & Catonsville, Maryland - Heavy Rain and Flash Flooding of May 27th, 2018įor the second time in just 22 months, torrential rain fell in the Ellicott City and Catonsville areas of Howard and Baltimore Counties. ![]()
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