Dallas Tornado, 20 October 2019 — EF3, 140 mph Winds, Zero Deaths

On the evening of 20 October 2019, severe thunderstorms erupted across North Texas ahead of a powerful upper-level storm system, and "a couple of supercell thunderstorms produced tornadoes across parts of North Texas, including the Dallas/Fort Worth Metroplex," in the words of the National Weather Service. The strongest of the night's tornadoes tore a 32-minute path through the northern half of Dallas County — and by the final damage survey, not a single person had died.

The NWS Fort Worth damage survey (final update, 24 October 2019) rated the tornado EF3 with estimated peak winds of 140 mph. It touched down at 8:58 PM CDT near State Highway 348 and Luna Road in northwest Dallas — listed as "3 ENE Irving" in the survey — tracked east-northeast, crossed I-35E, and lifted at 9:30 PM CDT "2 SE Richardson." The path ran 15.76 statute miles with a maximum width of 1,300 yards.

The survey describes the damage in detail. Between the freeway and Harry Hines Boulevard, numerous commercial structures were hit. Near the intersection of Harry Hines Boulevard and Walnut Hill Lane, businesses and residences suffered EF-1 and EF-2 damage; gas stations, large commercial buildings, churches, and at least one multi-story apartment complex took significant roof and exterior-wall damage. The corridor continued east-northeast along Walnut Hill Lane through the Marsh Lane and Midway Road areas, where east of Marsh Lane mostly single-family residences lost part or all of their roofs. Along Northaven Road west of US Highway 75, surveyors found a concentrated zone of EF-2 damage that included a single-family home with total roof loss and multiple collapsed exterior walls — the basis for the 140 mph EF3 estimate. Severe hardwood tree damage stretched from Marsh Lane to US Highway 75.

It was not the only tornado that night. The NWS confirmed a total of 10 tornadoes across North Texas in the episode, including a high-end EF-2 through Garland (135 mph winds, a 2.48-mile path) and four EF-1s and four EF-0s elsewhere.

The final survey lists the Dallas EF3 as 0 fatalities, 0 injuries. NOAA's Storm Events database puts it this way: "Miraculously, no one was killed or significantly injured in any of the tornadoes!" Two clarifications matter. First, the NWS's first survey product, issued the evening of 21 October, listed injuries as UNKNOWN — injury reporting was simply not yet complete — and some early reports of minor injuries never made it into the official record. The three injuries reported in Farmersville, in Collin County, were caused by straight-line winds that rolled a mobile home, not by any tornado. Second, the official damage figure: NOAA Storm Events records that the total estimated cost of insured damage "for all the tornadoes alone is over $2 billion, which the Insurance Council of Texas claims is the most costly tornado event in the state's history." That figure covers the whole outbreak's tornadoes combined, not the Dallas tornado alone.

Seven years on, the Dallas tornado stands as the costliest tornado event in Texas history by insured loss — and as a case study in how warnings, building quality, and timing can turn a nighttime EF3 through a major city into a disaster with no fatalities. Check US weather alerts by state and browse the disaster history archive.

Sources & references

• NWS Fort Worth - Damage Survey for 10/20/2019 Severe Weather Event, Update #4 (PDF)
• NWS Fort Worth - October 2019 Tornado Event Recap
• NOAA NCEI Storm Events - Dallas County Tornado, 20 Oct 2019 (Event 856409)