2023-08-07 16:08:38
A rare and severe wave of severe storms is expected on the US East Coast, affecting more than 50 million people from Georgia to New York.
The storms might unleash destructive winds, hail and a few tornadoes, mainly in the late followingnoon and early evening Monday.
The National Weather Service’s Storm Prediction Center has taken the extremely unusual step of declaring a Level 4 out of 5 risk of severe storms in parts of the Mid-Atlantic.
The area at greatest risk includes Washington, Baltimore, Roanoke, and much of the Appalachian Mountains toward Tennessee’s Cumberland Plateau. The National Weather Service warns that “an outbreak of severe weather is possible…with widespread damaging winds, locally destructive and isolated tornadoes.”
Dangerous storms with widespread very strong winds, large hail and a few tornadoes are likely this followingnoon and evening across parts of the Mid-Atlantic. Be sure to follow your local NWS Forecast Office for the latest forecasts and warnings. https://t.co/LZysnJZplf
— National Weather Service (@NWS) August 7, 2023
It is the first time since June 12-13, 2013 that Washington DC has been listed at that risk level.
This means you have “high confidence where many storms will contain damaging winds, severe hail and/or tornadoes” and expect “several scattered severe thunderstorms”.
A level 3 of 5 “enhanced” risk, which still poses a formidable threat, covers the area from Atlanta to western New York City. That’s where damaging winds and some tornadoes are still possible, but coverage and intensity may not reach Mid-Atlantic level.
Thunderstorms are most likely along the Interstate 81 corridor in the mid to late followingnoon, around the Interstate 95 corridor in the early evening, and closer to the Atlantic coast in the early evening.
Severe storm or tornado warnings will most likely be issued on the Monday followingnoon before the storms. More specific warnings will be issued when storms are imminent or occurring.
The main storm system has already brought at least two tornadoes in central Illinois on Sunday, including a potentially significant one that did not initially include a tornado warning. A pair of tornadoes also formed in Iowa on Saturday.
A very active start to the work week (#Monday) with a widespread threat for #severe thunderstorms across the Eastern U.S., per our colleagues @NWSSPC. From Philadelphia to Atlanta, these storms may contain swaths of damaging wind gusts, hail, a few tornadoes and heavy rain. pic.twitter.com/u0pxdyWfZj
— National Weather Service (@NWS) August 6, 2023
Hazards from storm surges on the east coast
Damage from destructive straight-line winds will be the primary hazard. The storms will produce violent outbursts, particularly in the Mid-Atlantic. The National Weather Service noted that some gusts to 80 mph are possible in the strongest storms. It is impossible to predict in advance which particular areas will be most affected. Tornadoes are possible with any of Monday’s storms. The risk will be greatest in the Mid-Atlantic from the central Appalachians through northern Virginia to central Pennsylvania. Initial storm cells in northwestern Virginia, northern West Virginia, the Maryland Panhandle, northern Maryland, southern Pennsylvania, and perhaps western New Jersey may be rotating supercells. Those would present the risk of hail, straight-line winds, and some tornadoes. The storms are likely to be progressive in nature, meaning they will likely move from west to east quickly enough to decrease the risk of flooding. However, heavy rains can cause brief flooding where drainage is poor, especially in urban areas.
Thunderstorms with the potential to produce damaging winds, large hail & possibly a few tornadoes are expected Monday across much of the Eastern US, especially the Mid Atlantic to the central & southern Appalachians. Heavy downpours might also result in localized flash flooding. pic.twitter.com/ZMYRCiOLhT
— NWS Eastern Region (@NWSEastern) August 6, 2023
recommendations
Charge devices/batteries before possible strong winds. Secure or move loose outdoor items inside. If possible, avoid parking vehicles near large trees. If there is a tornado or destructive wind warning, take shelter in an interior room, away from windows, on the lowest level of a sturdy building. Plan to be off the roads when severe weather begins. Have a way to be notified if warnings are issued in your sector. last News
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