June 7-9, 1953 — The Flint – Worcester Outbreak

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It was a time of buoyant optimism in the United States. Less than a decade after the American industrial machine first roared to life in a bid to help vanquish the Axis forces in World War II, the baby boom was well underway. Though the spectre of an apocalyptic nuclear war with the Soviet Union loomed ever-present and the Korean War continued to drag on, the country was thriving. The middle class had expanded rapidly, thanks in part to the strength of domineering unions, and consumerism and conservatism came to dominate much of American life. Scientists Francis Crick and James D. Watson prepared to unveil the double-helix structure of DNA. The first production Corvette – a sleek white convertible with red interior and a black canvas top – rolled off the production line at the iconic General Motors plant in Flint, Michigan. The manufacturer’s 50 millionth car, a golden-hued 1955 Chevy Bel Aire Sport Coupe, would be produced at the same plant in November of the following year. In December, Marilyn Monroe’s nude figure would be immortalized in the first issue of Hugh Hefner’s Playboy magazine.

The “Climax” bomb test resulted in a tremendously powerful explosion.

The Cold War was never far from the surface, however. On the arid, sandy Yucca Flat in the eastern portion of the Nevada Test Site, the U.S. Military conducted a frenzied series of atomic bomb tests in a never-ending effort to keep a leg up on the Soviets in the developing nuclear arms race. In the predawn hours of June 4, a Convair B-36 Peacemaker rumbled down the runway at Kirtland Air Force Base in Albuquerque, New Mexico and took to the dark skies 40,000 feet above the test range. As the first Air Force plane capable of delivering any nuclear device in the military’s arsenal without modifying its bomb bays, the B-36 quickly became the go-to choice for delivering a nuclear payload. As the doors to one of the plane’s bomb bays eased open, a relatively small, 30-inch fission bomb released and plummeted toward earth. At approximately 1,500 feet, a brilliant white flash and a gigantic, churning fireball burst into the sky. The bomb, codenamed “Climax” and a part of the curiously named “Operation Upshot-Knothole” series, was the most powerful ever tested on United States soil at the time, releasing a staggering 61 kilotons of explosive energy. The blast could be seen from Los Angeles and felt more than 500 miles away in Oregon, where it reportedly rattled windows and knocked items off shelves.

And despite a relatively quiet start to the year, the weather had been making the news as well. Just before 4:30pm on May 11, one of the deadliest tornadoes in the nation’s history tore a path through the heart of Waco, Texas. The six-story R.T. Dennis furniture store collapsed under the violent force of the wind, crushing 32 people inside. The same story repeated as pedestrians scurried inside several other large downtown buildings to escape the pounding rain, only to be killed when the structures gave way. Still others were crushed while trying to escape in their vehicles. When the dust settled and the victims had finally been extracted from the massive piles of rubble, 114 people had lost their lives. Another 13 were killed further to the west when more than a dozen blocks on the north side of San Angelo were obliterated by an extremely intense tornado. Though no one could have known at the time, it was about to get much, much worse.

This drawing, sketched by Truman Caldwell and completed by Waco Tribune-Herald artist Dick Boone, illustrates the tornado as Caldwell witnessed it while driving home toward the city.

 

February 19, 1884 — The Enigma Outbreak

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The first two months of 1884 had brought nearly ceaseless rain to much of the United States. Slate gray rain clouds had cast a pall over the land, blotting out what little late-winter sun there was to be had and inundating the already soggy ground. Grass and dirt turned to sloppy mud. Rivers and streams, swollen from the relentless precipitation, bulged and spilled over their banks. Meandering creeks transformed into raging rivers, major rivers into vast inland seas. For the first time in many days, the morning of February 19 brought a welcome respite. Morning broke to fair weather and mostly cloudless skies, and many engorged rivers began to slowly recede.

A broad, deep low pressure system was tracking across the upper Mississippi Valley just south of the Great Lakes, pulling in air from the south ahead of it. A strong southerly wind drawn from the Gulf of Mexico overspread the south with warm, soupy air. In Alabama, temperatures surged by ten degrees in the span of a few hours. In Mississippi, temperatures jumped nearly 20 degrees. Dewpoints rocketed to the mid- and upper-60s as winter-weary residents headed out to enjoy the springlike weather. Several hundred miles to the northwest, the story was much different. Trailing behind the low pressure system was a bitterly cold air mass, dragged down from high in the Arctic. Temperatures dropped by as much as 30 degrees in 24 hours with the passage of the cold front, bottoming out below zero in many places.

Surface chart from 7am. Strong southerly flow was evident ahead and south of the low, setting up a broad warm sector. Red “++++” icons indicate tornado tracks recorded in the following eight hours.

Surface chart from 3pm. Surface temperatures ranging from 60 to 75 degrees overspread much of the eastern United States ahead of the deepening low. Ground observations indicate temperatures in excess of 75 degrees actually reached as far inland as Kentucky and western Virginia.

Surface chart from 11pm. Enhanced low-level winds south and east of the rapidly deepening low, along with ample moisture, allowed for continued tornado production through the evening and overnight.

 

The negatively-tilted trough can be clearly seen on the 500mb map from noon on February 19.

A negatively-tilted trough dug southeast across the North-Central United States, while the core of an intense jet streak rapidly rounded its base. Adding to the already dangerous situation, a bulge of extremely dry air from the west began to nose in on the layer of deep moisture over the Southeast. While winds at the surface blew stiffly from the south and southeast, winds at mid-levels howled from the southwest and upper-level winds blew west to west-northwest. Additionally, wind speeds increased substantially with height throughout the atmosphere. The resulting directional and speed shear, combined with the high instability of the warm, oppressive airmass below and the dry air from the west, created ideal conditions for supercells and tornadoes over a broad area.

By mid-morning, cauliflower-shaped thunderheads began to pop up just ahead of the cold front near the Mississippi River. In the east-central Mississippi town of Winston, the southerly winds intensified and began veering toward the west-northwest. Rain came in fits, accompanied shortly thereafter by quarter-sized hail. As the precipitation abated, sharply shifting winds and a dull roar announced the arrival of the day’s first tornado. The twister destroyed two homes and a cotton gin before lifting near Louisville. Just before noon the first killer tornado barreled through the town of Columbus. Several plantations were destroyed and one woman was killed. The tornado continued its 25-mile track across the state line into Pickens County, Alabama.

At 12:20pm CST, the first violent tornado of the day touched down near Oxmoor, Alabama. The tornado tracked just southeast of Birmingham before tearing through the southern and eastern sections of the industrial town of Leeds. At least thirteen lives were lost, including four members of the Pool family, as dozens of homes were scattered in the howling wind. Newspaper reports suggest the tornado may have had a multi-vortex structure, with eyewitnesses stating that “several black shafts darted in quick succession from the cloud toward the earth.” Survivors of the tornado recounted that much of the town was left unrecognizable. Well-constructed brick homes in the area were leveled and several foundations were damaged or swept away, indicating probable F5 damage. Bodies were found impaled by various objects, and cattle and horses were reportedly skinned and dismembered. Eleven fatalities were recorded in the Leeds area. Thirty one were reportedly “gravely injured,” though the lack of subsequent reports makes it unclear how many ultimately succumbed to their injuries.

Drawing of an obliterated farmhouse near Leeds, Alabama. Artist unknown.

 

 By 1:00pm, the outbreak was nearing its peak as a broken line of supercells sprawled across much of the southeast. A small funnel descended into a field near Cartersville, Georgia. Racing to the northeast, the tornado rapidly intensified as it neared the community of Waleska. Three children were killed after they had been released from school early and taken shelter in their home. At the towns of Cagle and Tate in Pickens County, many homes were completely swept away. The majority of the affected homes belonged to prominent families and were large and well-built, indicating that this tornado, too, was perhaps of F5 intensity. The tornado and associated downbursts cut a swath nearly three miles wide through the forest, leveling homes as far apart as two miles. The bodies of several of the 22 total fatalities were reportedly carried more than half a mile. In total, the tornado and associated downbursts flattened at least 50 square miles of forest.

In East Alabama, what would prove to be perhaps the deadliest tornado of the outbreak descended from the skies just north of Jacksonville. The tornado tore through the Germania tanning yard before killing ten just north of Piedmont, then known as Cross Plains. As many as 20 lives were lost at Goshen, where a schoolmaster and six children were killed in a schoolhouse said to have been “blown to atoms.” All 19 of the remaining children were seriously injured. Large cotton bales were tossed at least half a mile, and many poorly-built homes vanished entirely. At Cave Spring, Georgia, four lives were lost and a number of well-constructed homes were scoured from the Earth. By the time the tornado had come to the end of its 35 mile path of destruction in western Georgia, it had taken more than 35 lives. Newspapers of the day made little effort to document the carnage in these rural communities, and the true death toll was likely much higher.

Shortly after 3:00pm, large hail — some three inches or more in diameter — began falling across central Georgia. The wind veered from south to northwest and the temperature began to drop. Moments later, a large multi-vortex tornado began shredding and snapping trees in Monroe County. Just northwest of Haddock, many large homes were swept away and at least eleven people were killed. Unconfirmed reports indicated at least an additional 12 fatalities. Among those killed were a mother and her four children, who had taken shelter inside their home as the storm approached. Witnesses north of Macon recounted that the tornado contained “multiple dark columns rotating about a common center.” Another 50 were injured along the 30-mile path.

At 8:30pm the final violent tornado of the outbreak began a path of destruction in southeastern Anson County, North Carolina. Two were killed and several homes were destroyed in Pee Dee. The tornado barreled through the southeast edge of the city of Rockingham. Several large homes were swept from their foundations, and large hardwood trees were reportedly debarked, denuded and snapped off near ground level. At least one victim in the area was reportedly thrown nearly a mile. The tornado intensified and widened to nearly one mile as it roared to the northeast. The small railroad community of Philadelphia, about three miles northeast of downtown Rockingham, was completely obliterated, with one observer noting that only “fragments remained of the houses and cabins.” At least 25 homes were razed to their foundations, their debris scattered over large areas. At least 15 residents of Philadelphia were killed in the storm.

In total, multiple waves of tornadoes scoured at least ten states across the Midwest and Southeast. Mississippi, Alabama, Georgia, North Carolina, South Carolina, Illinois, Indiana, Kentucky, Tennessee and Virginia were all impacted by tornadoes and destructive winds. The enigma, however, begins with the final number of tornadoes — although the official number ranges from 47 to 60, the Enigma Outbreak may actually have been among the largest in history. The extent of tornado-related damage is uncertain, but is suspected to have been several million dollars, the equivalent of perhaps $100 million today. More than 10,000 structures were destroyed. The final death toll, too, is a complete mystery. While the conservative estimate is 178 — a terrible toll in its own right — many estimates have placed the final number as high as 1,200. A further 2,500 may have been injured during the outbreak. The system produced more than 37 significant tornadoes (F2 – F5) during its 15-hour duration, ranking it still among the most violent outbreaks on record.

Map of all reported tornadoes during the Enigma Outbreak. Note that the northernmost tornado tracks may actually have been downburst damage. It is likely that there were many more tornadoes that simply went unreported, and some tracks may have been tornado families.

 

In the days leading up to the event, despite a recently enacted ban on the word “tornado” and a halt to nearly all research and forecasting, an intrepid scientist named John P. Finley worked diligently to record surface and atmospheric data and attempt to piece together the puzzle of tornado outbreaks. Finley developed meticulous tornado charts to track what he believed to be the most significant factors in tornado formation, including temperatures, dewpoints, dewpoint depression, wind direction and observed conditions. In his chart for the morning of February 19, seen below, he noted what he believed to be one of the most important indications of a tornado outbreak. A bulge of dry air, now referred to as a dryline bulge, was being pulled from Texas and Louisiana and forced into an area of warm, moist air overlaying Alabama and Georgia by strong easterly mid-level winds. This phenomenon is still used today to diagnose an enhanced tornado threat.

“Tornado chart” created by John P. Finley on the morning of February 19. Dewpoint isolines indicate a bulge of dry air from Louisiana cutting into the existing tongue of moist air over Alabama and Georgia, boosted by a strong southerly low-level jet. Added arrows represent dry air intrusion (orange) and moist air surge (green).

 

Because of the extremely dynamic nature of the storm system in place, a range of severe weather effects were experienced over a vast swath of the eastern United States. The upper Midwest was gripped by an intense blizzard, with gale-force winds and snowfall rates exceeding one to two inches per hour in some areas. Much of the Ohio Valley experienced the violent winds and torrential rains of a derecho, with widespread and severe non-tornadic wind damage. Thousands of trees were “prostrated by the extreme wind,” and telegraph communications were cut off for several days. Across the Ohio Valley, the Ohio River and its many tributaries had already spilled over their banks. The additional rainfall from the storms of the 19th and 20th led to flooding which exceeded all records. Homes were swept away by deadly floods in Louisville, Kentucky; Jeffersonville, Indiana; and many other towns along the Ohio and its tributaries. At Union Point in Greene County, Georgia, hail fell in such volume that the ground was covered to a depth of three inches.

Though the true extent of the Enigma Outbreak have been lost to the ravages of time, it still stands among the most widespread and violent tornado outbreaks in history. The tornado which struck Philadelphia and Rockingham remains the deadliest tornado in the history of North Carolina. Limited newspaper resources and shoddy reporting also makes it difficult to place this outbreak historically. Damages and deaths in rural areas were very poorly reported, and the deaths of African-Americans were not counted nor recorded. Given the large African-American population in the affected areas, it’s likely the death toll was much larger than the officially accepted number. The nickname is certainly well-deserved, and the many mysteries of the Enigma Outbreak will continue to draw intrigue well into the future.