Explaining violent storms and a ‘rain train’ that blasted D.C. area & More news

 

Placeholder while article actions load

A pair of violent thunderstorms hammered areas south of Washington Wednesday afternoon; the cities of Fredericksburg and Warrenton were particularly hard hit. While the immediate D.C. area was spared those initial blows, it was soaked by a relentless stream of storm cells Wednesday night. This “rain train” caused areas of flooding and bewildered storm-watchers by its unusual north-to-south motion.

The Fredericksburg and Warrenton storms — with estimated winds over 80 mph — downed hundreds of trees and led to more than 100,000 power outages.

The Fredericksburg storm first developed north of the District before erupting in Prince William County, where it first caused wind damage. The storm then bolted southward along Interstate 95 taking down trees and wires all along its path — which ended south of Richmond. Winds were intense enough to strip siding from homes and even shift a shed off its foundation, according to reports from the National Weather Service.

The Warrenton storm was comparably intense. It first caused tree damage in southern Loudoun and northern Fauquier counties around Middleburg and the Plains. It downed “dozens of trees” near Marshall, according to the Weather Service. In west-central Fauquier County, including Warrenton, there were “hundreds of trees blown down, many into homes with at least three structure collapses,” the Weather Service wrote. The storm also toppled trees around Culpeper before the storm weakened.

Amid the numerous storms that swept through the region, there were also several reports of homes struck by lightning. At least one firefighter was hurt responding to lightning strike at a home in Loudoun County.

D.C. region awakens to downed trees, power outages and some flooding

The storms lined up into north to south rows like trains along a track, unloading tremendous rainfall in some areas.

Some of the heaviest rain focused along and just west of Interstate 81, where streams overflowed and roads were closed.

Around Washington, a train of storm cells that stretched as far north as central Pennsylvania cycled through the area starting around 7:30 p.m. and continued well after midnight. Minor flooding was reported along Rock Creek at Sherrill and Beach drives, where several vehicles were stranded or disabled.

Generally one to two inches of rain fell in the Beltway region; across the broader region amounts varied from around 0.1 to over 3 inches. Here are some of the totals:

  • Woodbridge: 3.1 inches
  • Front Royal: 2.5 inches
  • Fairfax: 2.29 inches
  • Fort Belvoir: 2.18 inches
  • Reagan National Airport: 1.86 inches
  • Rockville: 1.78 inches
  • Winchester: 1.4 inches
  • Dulles: 1.00 inches
  • BWI Marshall: 0.66 inches

Explaining the storminess

The Fredericksburg and Warrenton storms were isolated and occurred roughly one hour and 40 miles apart. The systems were compact, bow-shaped thunderstorm complexes that traveled rapidly from north to south — an atypical motion for our region during summer.

The storms initiated and tracked along a north-south oriented frontal boundary and were being steered by a deep flow of wind from the north.

The first complex congealed near Dale City around 2:15 p.m. and tracked south along I-95 before dissipating south of Richmond. The radar animation of the system is shown below. In the animation, the left panel shows radar reflectivity (the intensity of rain) while the right panel reveals Doppler-derived wind speed.

The storm complex initiates as an undulating, solid arc of cells which then rapidly bows out and elongates toward the south. A powerful surge of downdraft wind was responsible for the transformation to a bowing shape. Those winds were detected by the Doppler radar in Sterling, Va., and shown by the patch of orange colors along the leading edge of the bow.

The image below reveals the peak strength of these winds — nearly 88 mph, and in the range of 78 to 96 mph at other times. At this distance from the radar, the lowest scan beam was several thousand feet above the ground, so these values do not reflect wind speeds at the ground. But they do reveal the intense momentum at play in this downdraft — a large percentage of which undoubtedly made it to the surface to create damage.

The second complex developed south of Purcellville just after 4 p.m., expanding into a bowing complex as it tracked rapidly to the south. The track of the storm took the violent core of wind just west of downtown Warrenton as can be seen in the radar loop below.

Peak Doppler-derived wind speeds were in the 90 to 95 mph range as shown in the following radar snapshot:

The violent winds were the result of straight-line flow called a downburst, which occurs when an exceptionally strong downdraft strikes the surface and the airflow surges outward along the ground, literally as a blast of wind. The strongest winds occur in the direction that the storm is moving.

The great number of trees and scope of the devastation seems “derecho-like,” but in fact neither of these storm complexes qualifies as a derecho; derechos are defined by a minimum path of continuous wind damage at least 250 miles long.

Training storm cells and heavy rain

Some locations across the region picked up several inches of rain from this event, others not nearly as much. Interestingly, the heaviest rains fell in long, parallel, narrow corridors oriented north to south.

This type of situation can happen when the frontal boundary that serves to lift the air into thunderstorm updrafts — in this case, a nearly stationary front oriented north to south — aligns parallel to the steering flow established by deep layer of winds above the ground.

The deep layer winds were from a very unusual direction for late June — due north — because the jet stream, a river of fast-flowing air in the upper atmosphere, is in a highly contorted pattern. A heat dome is lodged over the Southeast and the jet stream, along which storms track, is riding over top it, taking a sharp dip over the Northeast.

Brutal heat bakes Southeast, with more record highs forecast Thursday

A dramatic radar snapshot (above) shows one of these rain trains in action during the mid-evening; the corridor extends from Harrisburg, Pa., to downtown Washington.

 

I have tried to give all kinds of news to all of you latest news today 2022 through this website and you are going to like all this news very much because all the news we always give in this news is always there. It is on trending topic and whatever the latest news was

it was always our effort to reach you that you keep getting the Electricity News, Degree News, Donate News, Bitcoin News, Trading News, Transfer News, Gaming News, Trending News, Digital Marketing, Telecom News, Beauty News, Banking News, Travel News, Health News, Claim News latest news and you always keep getting the information of news through us for free and also tell you people. Give that whatever information related to other types of news will be

made available to all of you so that you are always connected with the news, stay ahead in the matter and keep getting today news all types of news for free till today so that you can get the news by getting it. Always take two steps forward

All this news that I have made and shared for you people, you will like it very much and in it we keep bringing topics for you people like every time so that you keep getting news information like trending topics and you It is our goal to be able to get

all kinds of news without going through us so that we can reach you the latest and best news for free so that you can move ahead further by getting the information of that news together with you. Later on, we will continue

to give information about more today world news update types of latest news through posts on our website so that you always keep moving forward in that news and whatever kind of information will be there, it will definitely be conveyed to you people.

All this news that I have brought up to you or will be the most different and best news that you people are not going to get anywhere, along with the information Trending News, Breaking News, Health News, Science News, Sports News, Entertainment News, Technology News, Business News, World News of this news, you can get other types of news along with your country and city. You will be able to get information related to, as well as you will be able to get information about what is going on around you through us for free

so that you can make yourself a knowledgeable by getting complete information about your country and state and information about news. Whatever is being given through us, I have tried to bring it to you through other websites, which you may like

very much and if you like all this news, then definitely around you. Along with the people of India, keep sharing such news necessary to your loved ones, let all the news influence them and they can move forward two steps further.

Credit Goes To News Website – This Original Content Owner News Website . This Is Not My Content So If You Want To Read Original Content You Can Follow Below Links

Get Original Links Here🡽

Scroll to Top