Everything You Need to Know About Long Track Tornadoes

Hey there! As a meteorologist and storm chaser, I‘ve seen plenty of tornadoes in my day. But the long track tornadoes – those monsters that just keep going and going – even make me shake in my boots. If one sets its sights on a populated area, it can mean disaster.

In this guide, I want to make sure you understand everything important about these tornado titans – from how they form, to where they hit, to how to stay safe if one comes your direction. Consider this your tornado master class. Let‘s get started!

What Exactly Makes a Tornado "Long Track"?

For a tornado to join the long track club, it needs a few key attributes:

• A path length over 100 miles – This is the generally accepted minimum to be considered a long-tracker. The longest on record was the Tri-State Tornado of 1925 with a staggering 219 mile continuous path.

• A duration over 2 hours – Your typical tornado lasts less than 30 minutes. Long track tornadoes can terrorize an area for 2-3 hours or more. The 1925 Tri-State tornado holds the record again at a whopping 3.5 hours duration.

• Maintains strength and organization – A long track tornado needs an intact parent thunderstorm, usually a supercell, to supply it with energy. This allows it to keep rotating and carve out a long path of destruction.

• A wide damage path – They tend to be over 1 mile wide, making the scope of their destruction immense. The 2013 El Reno, Oklahoma tornado was the widest ever recorded at 2.6 miles.

So in summary, long track tornadoes can travel over 100 miles while staying strong and organized for an extended period. That‘s what makes them so scary! Now let‘s look at some key facts about these tornado titans:

Longest duration: Tri-State Tornado, 1925 – 3 hours 29 minutes

Longest path: Tri-State Tornado, 1925 – 219 miles

Top width: El Reno, OK Tornado, 2013 – 2.6 miles wide

Highest wind speed: 1999 Bridge Creek-Moore, OK Tornado – 301 mph

Deadliest: The Tri-State Tornado, 1925 – 695 deaths

Where Do Long Track Tornadoes Typically Form?

The central Great Plains of the U.S. is hotspot territory for long track tornado birth. This includes Kansas, Oklahoma, Nebraska, and Iowa – right in the heart of “Tornado Alley."

The Southeast also sees its fair share. Humid Gulf air colliding with dry systems moving east off the Rockies creates a tornado breeding ground.

But really, any area can spawn one if the ingredients are right – a fierce supercell thunderstorm, high instability, and strong wind shear (changing wind speed/direction with height).

Some notable long track tornado hot spots include:

• Texas / Oklahoma – The wide open spaces and flat terrain here are ideal for building massive storm systems. Some examples: the 1953 Waco Tornado (114 miles), the 1999 Oklahoma City Tornado (72 miles).

• Kansas / Nebraska – Sitting right in Tornado Alley, this area has recorded several monsters including the 1917 Enid-Purcell Tornado (143 miles), the 2004 Hallam Tornado (123 miles).

• Iowa / Illinois / Indiana – Numerous long-lived tornadoes in the heartland like the 1884 Enigma Tornado (160 miles), the 1965 Palm Sunday Outbreak (47 tornadoes, 270 deaths).

• Alabama / Mississippi – Known as Dixie Alley, killer tracks like the Super Outbreak of 1974 (148 tornadoes, 330 deaths) and the 2011 Tuscaloosa-Birmingham Tornado (132 miles) wreaked havoc here.

• Ohio River Valley – Features like mountains and hilly terrain can actually strengthen storms. The 1974 Super Outbreak (148 tornadoes) devastated this area.

So while Tornado Alley may be the bulls-eye, outbreaks and long-lived tornadoes are a threat for much of the central and eastern U.S. during springtime.

Why Are Long Track Tornadoes So Dangerous?

There are two primary factors that make these tornadoes extremely hazardous:

1. Their ability to impact numerous towns and cities – A single tornado traveling continuously for 100+ miles has the potential to plow through countless communities, affecting tens of thousands.

For example, the 1974 Super Outbreak produced 148 tornadoes over a two day period, including 30 long tracks. It demolished entire towns and rural areas and killed 330 people.

2. The challenge of pinpointing the path – With such a large potential path, uncertainty arises about exactly where it will travel, making evacuations extremely difficult to coordinate.

People 100 miles down the road may not take warnings as seriously without knowing if it‘s headed their way. But these storms can suddenly change direction. Advanced warning is critical.

Some of the most catastrophic tornadoes in history were long track storms. In 2011, the Joplin, Missouri tornado and Tuscaloosa-Birmingham, Alabama tornado each stayed on the ground over 130 miles, killed over 150 people individually, and caused billions in damage.

Deadliest Long Track Tornado Outbreaks

Let‘s look at 5 of the deadliest long track tornado events in U.S. records:

As you can see, when conditions are right for tornado formation, the results can be devastating if storms repeatedly develop into long track monsters.

What Factors Lead to Their Extreme Longevity?

Meteorologists are continuously studying the precise ingredients that allow some tornadoes to travel such huge distances while staying intact for so long. But based on our knowledge, these are some of the key factors:

• A fierce, organized parent thunderstorm – Typically an intense supercell with a persistent rotating updraft (called a mesocyclone) that continuously feeds the tornado.

• Ideal wind shear profiles – Having robust wind shear (change of wind speed/direction with height) promotes rotation within the storm.

• High instability – Warm, humid air near the surface and much cooler temps aloft leads to vigorous rising motion, the fuel for storms.

• Minimal surface friction – Smooth, flat terrain prevents turbulence from disrupting the tornado‘s circulation. Hilly/mountainous areas lead to shorter tracks.

• Continuous warm, moist inflow – The thunderstorm ingests this "fuel" from around and ahead of it, allowing regeneration.

When all these ingredients come together, it can mean a continuously rotating supercell spawning an EF4 or EF5 tornado that just keeps going…and going. Terrifying to imagine.

Forecasting Long Track Tornadoes – Improving Warnings

Prior to the mid 1990‘s, tornado warnings often came too late for communities in the path of long track storms. But thanks to huge advances in weather technology – from Doppler radar to fine scale computer models – lead time and detection have dramatically improved.

On average, warnings are now issued 13-15 minutes before a tornado strike. But for long track storms, we need as much lead time as possible. Here are some vital improvements:

• Doppler Radar – Detects areas of rotation even before a tornado forms. This increased warning time from under 5 minutes to around 10-15 minutes on average.

• Weather Satellites – Helps monitor massive storm systems with the potential for multiple tornadoes. Critical for early alerts.

• Advanced Computer Models – High resolution models can now resolve small scale features and predict tornado outbreaks days in advance.

• Tornado Sirens – Alert people to take cover immediately with directional speakers that warn whole counties.

• Storm Chasers – Experts who track storms in person can confirm tornado formation and provide near instant warnings.

• Detection Algorithms – Automated analysis of radar data has led to faster tornado detections and warnings.

• Smartphone Warnings – Wireless Emergency Alerts and Apps provide warnings to millions immediately.

So improvements across the board have given people critical extra minutes to get to safety when in the path of potential long track tornadoes. Now let‘s get into how you can prepare if one comes your way…

How to Prepare for a Potential Long Track Tornado

I want to make sure you‘re as prepared as possible if one of these destructive tornadoes threatens your area. Here are my top safety tips:

• Have multiple warning methods – Outdoor sirens, weather radio, TV alerts, smartphone apps – use as many as possible so warnings don‘t get missed.

• Develop an emergency action plan – Know where you‘ll take shelter, how and when to evacuate if told, and where to reunite with family if separated.

• Prepare disaster supply kits – Have essentials ready like water, non-perishable food, medicines, flashlights, batteries and documents.

• Conduct regular tornado drills – Make sure everyone knows exactly what to do so it becomes instinct when tornado strikes. Don‘t forget pets!

• Take all tornado warnings extremely seriously – Don‘t ever try to second guess the path. Seek appropriate shelter immediately, even if the tornado isn‘t an imminent threat to your location yet.

• Watch for approaching signs – Darkening, greenish skies, hail, loud continuous roar – these signs indicate an advancing tornado. Take cover.

• Monitor weather alerts frequently – Check forecasts and live radar often, especially when threats increase. Don‘t get caught off guard.

• Have protective clothing/gear – Sturdy shoes, bike/sports helmets can protect from head/foot injuries caused by flying debris when sheltering.

• Learn your community‘s siren policies – In some areas, sirens are sounded immediately for tornado warnings. In others, only once a tornado is confirmed. Understand local procedures.

The more prepared you are, the safer you‘ll be even in the path of one of these monsters. For maximum protection, build a FEMA safe room or fortify an interior room on the lowest floor of your home.

Stay weather aware my friend…and here‘s to steering clear of long track tornadoes!