Weather event in the southern United States of early 2019
Tornado outbreak of April 17–19, 2019
Map of tornado warnings, confirmed tornadoes, and wind reports from the outbreak with infrared satellite imagery of the storm system from the evening of April 18
The tornado outbreak of April 17–19, 2019 was a multi-day, widespread severe weather event stretching from the South-Central United States to the East Coast of the United States. On the heels of a significant tornado outbreak just a few days prior, another potent upper-level trough progressed eastward and served as the impetus for widespread, damaging thunderstorms. The outbreak began on April 17 with several short-lived, generally weak tornadoes across Kansas, Oklahoma, and Texas. The following day, a total of 43 tornadoes were recorded across central Mississippi, tying the Hurricane Rita tornado outbreak as the largest in Mississippi state history. On April 19, the event spread eastward. North Carolina recorded 12 tornadoes, the state's sixth largest outbreak in a single day, while Virginia recorded 16 tornadoes, its third-most in a 24-hour period. Overall, 97 tornadoes were confirmed, the strongest of which was a high-end EF3 tornado that heavily damaged or destroyed homes and outbuildings near Rocky Mount, Virginia. There were no fatalities recorded in association with tornadic activity, but four people were killed by trees that were downed by strong straight-line winds.
Meteorological synopsis
April 17
On April 13, the Storm Prediction Center (SPC) outlined a broad swath of the Central United States for the potential for severe thunderstorms four days later.[2] The general threat area was further expanded on April 14, and a heightened risk was introduced from eastern Texas northward into Iowa, indicative of higher confidence of a severe weather outbreak.[3] The next day, a day 3 Enhanced risk was introduced across portions of North Texas, southeastern Oklahoma, and southwestern Arkansas,[4] where supercell thunderstorms capable of producing very large hail were expected. This threat level was maintained going into the event. As a shortwave trough moved into the Central Plains on the afternoon of April 17, strong forcing helped to eliminate the cap across the region. An unstable atmosphere, characterized by mid-level Convective Available Potential Energy (CAPE) values of 1,500–2,500 J/kg, strong wind shear, and very steep mid-level lapse rates of 8.5–9 C/km,[5] led to the formation of discrete supercell thunderstorms along a stationary front across the Texas and Oklahoma panhandles, as well as southern Kansas. Sporadic large hail and landspout tornado reports were received before the storms congealed into a line,[6] transitioning the main severe threat to damaging wind gusts.[7] Less concentrated activity occurred throughout the region, including a thunderstorm that produced five consecutive minutes of winds above 58 mph (93 km/h), and a peak gust of 74 mph (119 km/h), in Denton, Texas.[8]
April 18
As the SPC introduced a day 5 threat area across the Central United States valid on April 17, the organization also outlined a large day 6 region across portions of the Midwestern states, Mississippi Valley, and Appalachia.[2] A day 3 Slight risk was originally introduced from the central Gulf Coast north into southern Illinois, but a rare mid-afternoon update outlined an Enhanced risk across eastern Louisiana into southern Mississippi.[9] It was later expanded eastward to encompass much of Alabama as well as the Florida Panhandle.[10] In their 16:30 UTC update on April 18, the SPC contemplated upgrading portions of the risk area to a Moderate risk (driven by the chance for tornadoes), but ultimately deferred due to questions surrounding the characteristic of expected storms.[11] As the aforementioned, well-defined shortwave trough progressed eastward into the lower Mississippi Valley, a mesoscale convective vortex organized over west-central Mississippi.[12] Embedded circulations and semi-discrete supercell structures within this complex led to 44 confirmed tornadoes, the strongest of which caused high-end EF2 damage in Morton, Mississippi.[13] This ties the Hurricane Rita tornado outbreak as the largest outbreak in Mississippi state history.[14] As the squall line tracked east, numerous reports of damaging wind gusts were received across the Southeast United States.[15]
April 19
The first indications for organized severe weather on April 19 came six days prior, when the SPC introduced a day 7 threat area from Maryland southward into southern Florida.[2] This outlook was maintained over subsequent days, transitioning to a day 3 Enhanced risk across portions of northeastern South Carolina, eastern North Carolina, and southeastern Virginia on April 17.[16] The next day, the highest risk area was extended southward into Georgia and Florida.[17] By the morning of April 19, a Moderate risk was introduced, stretching from eastern South Carolina into south-central Virginia.[18] Along the leading edge of strong forcing, a severe squall line developed across central Florida northward into southern Virginia,[19] leading to hundreds of damaging wind reports throughout the region.[20] Ahead of this line, multiple long-lived supercells tracked across the Carolinas and into southern Virginia, with others developing as far north as Pennsylvania. Several strong tornadoes touched down within this corridor, where mid-level CAPE reached 1,000 J/kg and low-level wind shear profiles became conducive for tornadoes.[21] Overall, 12 tornadoes touched down in North Carolina, the state's sixth largest outbreak on record in a single day.[22] Meanwhile, 16 tornadoes were confirmed in Virginia, the state's third largest outbreak in a 24-hour period, surpassed only by the Hurricane Ivan tornado outbreak and the 1993 Virginia tornado outbreak.[23] Into the evening, a loss of daytime heating led to a diminishing of the severe weather potential as thunderstorms shifted eastward into the Atlantic Ocean.[24]
At its peak intensity, this large tornado snapped or uprooted a large swath of trees. Elsewhere, some homes sustained minor roof damage or were impacted by falling trees.[37]
A long-tracked tornado significantly damaged a mobile home, leaving one partial interior wall and the floor. A second mobile home had its rear exterior wall ripped out. Numerous trees were snapped and uprooted, some of which fell on homes and vehicles. A large metal building was completely destroyed, a couple of barns and sheds lost portions of their roofs, and a couple of power poles were uprooted, with power lines downed.[40]
At the Clinton Walmart, the garden center and a fence were damaged, and two vehicles were blown over. Trees were downed around apartment complexes to the east before the tornado lifted.[41]
This large multiple-vortex tornado downed massive swaths of trees along its path, as well as some power poles and lines. At a few points, there were varying degrees of intensity within the tornado itself, indicating multiple vortices were present inside it.[44]
Hundreds of trees and many power lines were downed. Multiple homes suffered either minor damage from tornadic winds or more substantial damage from fallen trees.[48]
A high-end EF2 tornado touched down in Morton, where numerous large trees were snapped or uprooted and multiple homes had their roofs torn off. One home sustained collapse of several exterior walls, and several others sustained minor to moderate roof damage. Trees and tree limbs were downed farther along the path before the tornado dissipated.[53]
Several mobile homes suffered minor roof damage. A gas station had a large section of its roof removed. Sheet metal was peeled back on several barns and chicken houses. Numerous trees were snapped and uprooted.[55]
A very large but weak tornado peeled off tin metal from a barn and old chicken houses, and it also snapped and uprooted numerous trees. One home suffered minor damage from a fallen tree limb.[56]
Numerous trees were snapped or uprooted, some of which fell on homes and caused structural damage. A church and a nearby building sustained roof damage, and an exterior wall was collapsed outward at an urgent care.[67]
The tin roof of a church was partially removed, an irrigation pivot was partially flipped, multiple homes suffered roof damage, and trees were damaged too.[76]
A high-end EF1 tornado struck Brooksville, producing considerable damage to structures at its peak. Other homes suffered more minor roof damage. Several utility poles were downed and trees were damaged.[77]
A large empty grain bin was slid off its base and bent inward, the roof of a large metal building was partially removed, and a few trees were uprooted.[78]
April 19 event
List of confirmed tornadoes – Friday, April 19, 2019[note 1]
This intense tornado caused significant damage to the south of Rocky Mount. A well-built brick home sustained total loss of its roof and exterior walls. A modular home was left with only a few walls standing, and 10 outbuildings were damaged or destroyed. Vehicles and large metal storage tanks were thrown considerable distances. Numerous trees were snapped or uprooted, and metal light poles were bent to the ground at a baseball field in the Sontag community. Two people were injured.[82]
An inn lost some shingles, a mobile home had its metal skirting damaged, and some small outbuildings were damaged in the small community of Ashford. Some trees were also uprooted.[83]
A metal roof at a one-story home was partially lifted and thrown. The majority of damage was snapped or uprooted trees, some of which took down power lines.[85]
A strong tornado snapped or uprooted a large number of trees, some of which fell on homes, vehicles, and sheds. A metal shed was completely destroyed, with its debris spread over a 100 yd (91 m) area.[87]
Numerous trees were snapped and uprooted, and two mobile homes were destroyed by fallen trees. A cinder block garage had its walls collapsed and metal roof thrown across a road. A center pivot irrigation system was overturned.[88]
A large two-story chicken house was completely destroyed, a small outbuilding suffered damage to its metal roof and siding, and a small shed was moved 2 ft (0.61 m) off its foundation. The underpinning of a mobile home was damaged. Numerous trees were snapped or uprooted as well.[89]
At a campsite, two docks, a cabin, and multiple trees were damaged. Some of those trees fell on homes, vehicles, and boats. The strong tornado continued northeast, completely destroying one mobile home and significantly damaging others. Additional houses suffered minor damage before the tornado lifted.[91]
A strong tornado snapped and split large, healthy trees along its path. Some of these trees landed on homes and vehicles. Several homes in the southern part of Hillsborough received considerable damage, including one home that had its roof and several of its exterior walls completely destroyed.[97]
Power poles and power lines were downed, outdoor furniture was tossed, and at least one home suffered minor damage to its roof in Sampson County. The tornado remained on the ground intermittently into Johnston County, where it caused considerable roof and window damage to two homes and blew over several grain silos. Numerous trees were snapped and uprooted along the entirety of the path.[99]
Numerous trees were snapped or uprooted, one of which fell and killed a horse, and a second of which damaged three vehicles. A recreational vehicle was blown over, several small outbuildings and sheds were destroyed, and power lines were severed.[100]
This tornado completely destroyed a single-wide mobile home, lofting its remnants for hundreds of yards down the tornado's path. Several other mobile homes nearby only sustained minor damage. Some farm outbuildings were also damaged, but otherwise this tornado mostly snapped and uprooted trees.[102]
Several structures in South Weldon sustained minor damage to their roofs and siding as a result of this long-tracked tornado. Many trees were snapped and uprooted along the remainder of the tornado's path.[103]
Commercial buildings suffered significant damage, several power poles were snapped, and numerous trees were snapped or uprooted. Several residential homes and garages were damaged as well.[110]
Sporadic damage to barns and the roofs of homes occurred. One barn was completely destroyed at high-end EF1 intensity. Trees were snapped or uprooted as well.[112]
The roof of a rod and gun club was lifted and partially blown off, with the south-facing exterior wall blown in. Extensive tree damage was observed, with numerous trees snapped or uprooted.[115]
Several hundred trees were snapped or uprooted, with several trailers were destroyed by fallen trees. Another trailer was flipped, and the roof of a fire station in Lewistown was partially removed.[117]
This tornado removed the roof of a two-story home, and snapped numerous trees on the property. Another home's garage also sustained damage, and a tree was blown over onto a car.[119]
This tornado likely began as a waterspout over the Warwick River. Upon moving ashore, it produced mainly tree damage, though it did also destroy a small storage shed.[120]
Trees were snapped or uprooted, some fencing was blown over, and shingles were blown off several townhouses in Reston. An outdoor shed was destroyed. Fallen trees caused significant damage to one townhouse, one home, and the front end of an unoccupied vehicle.[122]
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^"Mississippi Event Report: EF1 Tornado" (Report). National Centers for Environmental Information. National Weather Service Weather Forecast Office in Jackson, Mississippi. 2019. Retrieved December 19, 2019.
^"Mississippi Event Report: EF1 Tornado" (Report). National Centers for Environmental Information. National Weather Service Weather Forecast Office in Jackson, Mississippi. 2019. Retrieved December 19, 2019.
^"Mississippi Event Report: EF1 Tornado" (Report). National Centers for Environmental Information. National Weather Service Weather Forecast Office in Jackson, Mississippi. 2019. Retrieved December 19, 2019.
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^"Pennsylvania Event Report: EF2 Tornado" (Report). National Centers for Environmental Information. National Weather Service Weather Forecast Office in State College, Pennsylvania. 2019. Retrieved December 20, 2019.
^"Virginia Event Report: EF0 Tornado" (Report). National Centers for Environmental Information. National Weather Service Weather Forecast Office in Wakefield, Virginia. 2019. Retrieved December 20, 2019.
^"Virginia Event Report: EF2 Tornado" (Report). National Centers for Environmental Information. National Weather Service Weather Forecast Office in Wakefield, Virginia. 2019. Retrieved December 20, 2019.
^"Virginia Event Report: EF0 Tornado" (Report). National Centers for Environmental Information. National Weather Service Weather Forecast Office in Wakefield, Virginia. 2019. Retrieved December 20, 2019.
^"Virginia Event Report: EF0 Tornado" (Report). National Centers for Environmental Information. National Weather Service Weather Forecast Office in Wakefield, Virginia. 2019. Retrieved December 20, 2019.
^"Virginia Event Report: EF0 Tornado" (Report). National Centers for Environmental Information. National Weather Service Weather Forecast Office in Washington, DC. 2019. Retrieved December 20, 2019.