The 1925 Tri-State tornado, the deadliest tornado in US history, happened in the afternoon of Wednesday, March 18, 1925. It crossed from southeastern Missouri, through Southern Illinois, then into southwestern Indiana, and was the deadliest tornado in U.S. history. During 3.5 hours, 695 fatalities were confirmed from the largest tornado and over 50 additional fatalities, the tornado killed more than twice as many as the second deadliest, the 1840 Great Natchez Tornado. Around 2,300 injuries were reported and close to $2 billion in property damages (todays prices). The continuous ≥219 mile (≥352 km) track left by the tornado was the longest ever recorded in the world. The outbreak in total involved the states of Missouri, Illinois, Indiana, Kentucky, Tennessee, Alabama, Kansas, possibly other states. While not officially rated by NOAA, it is recognized by many as an F5 tornado, the maximal damage rating issued on the Fujita scale.
The Rahu-Saturn period was operating in the SAMVA USA chart. We know that periods of dual malefics are typically more difficult. Both these planets are also afflicting in the chart. The planet Saturn as 8th lord of obstacles and endings and the acting sub-period lord was in transit at 20° 59' Libra and as such conjunct the MEP of the 4th house of real estate, while aspecting also the 6th house of malfunction, 10th house of public administration and 1st house of self, transit Rahu at 20° 01' Cancer/H1, natal Ketu at 17° 47' Libra as well as transit Moon as 1st lord at 20° 06' Sagittarius and 6th house and 6th lord Jupiter at 25° 38' Sagittarius in the 6th house and natal 4th lord Venus at 23° 50' Sagittarius in the 6th house. We should note that Venus was thus dual afflicted, while transit Venus was badly placed in the 8th house of obstacles and endings. The nodes were also exactly afflicting all the odd numbered houses and transit debilitated 3rd lord Mercury at 17° Pisces in the 9th house. Natal Jupiter was also afflicting transit Sun and transit Mars. In short, the period lords were both first rate malefics, all the planets were afflicted or afflicting and some were badly placed in transit while most of the houses were afflicted. No wonder that a major devastating natural disaster took place in the USA at that time.
2. The 1999 Oklahoma tornado
The 1999 Oklahoma tornado outbreak killed around 50 people and caused around $2 billion in property damage. The tornado outbreak was a severe weather event that lasted for over 72 hours, from May 3 until May 6, 1999. Violent storms broke out in Oklahoma, Kansas, Arkansas, Texas and Tennessee. In total 140 tornados were reported, with the most violent touching down on May 3 in southwest of Chickasha, Oklahoma, and becoming an F5 before dissipating over Midwest City, Oklahoma. The tornado tore through Bridge Creek, Oklahoma and Moore, Oklahoma, causing close to $2.0 billion in damage (todays prices). Forty-eight people perished during the outbreak. This tornadic event ranks in severity with the Palm Sunday tornado outbreak of 1965. With a total of 66 tornadoes, it was the most prolific tornado outbreak in Oklahoma history, although not the deadliest. At 318 mph, the tornado is the fastest tornado ever recorded.
Astrology of the event
The Venus-Venus period was running in the SAMVA USA chart. We may recall that Venus is a major indicator of weather, in that it rules comforts. In the early evening hours of May 3, 1999 when the tornado broke out transit 4th lord Venus was in infancy and bad placement at 0° Gemini and 12th house of losses and hence weak to protect its indications. Natally, Venus is also weak in the SAMVA USA chart and its MT house and house of placement are afflicted. This weakness and affliction involving Venus and the 4th lord, explains why the USA has a history of and predisposition to natural catastrophes, including destructive weather and earthquakes. However, this placement, natally and in transit, is not sufficient to explain such an outcome. The influence of the functional malefic planets, Rahu, Ketu, 8th lord Saturn and 6th lord Jupiter is needed to generate violent events, which result in fatalities, injuries and property damage as well as bringing tremendous disruption to large areas of the country.
On these days, aspects involving the FMs in the SAMVA USA chart were there in abundance. Transit Ketu at 23° 51' Capricorn in the 7th house was exactly conjunct natal 2nd lord Sun. Transit Rahu at 23° 51' Cancer and 1st house was opposing the Sun but also casting an aspect to transit Jupiter at 25° Pisces and 9th house and natal Saturn at 26° 46' Scorpio and 5th house. Transit Jupiter was also closely afflicting natal Saturn and also a transit debilitated 3rd lord Mercury at 27° 45' Pisces and 9th house. Moreover, when the tornado broke out on that day, transit 1st lord Moon passed over natal Saturn and transit 2nd lord Sun at 19° 12' Aries and 10th house was conjunct natal Rahu at 17° 47' Aries.
As in other such studies, these events show up clearly in the SAMVA USA chart. However, accurate predictions, including on weather phenomena, are the most important when demonstrating the veracity of the chart.
 1925 Tri-State tornado
 1999 Oklahoma tornado