Tornado Safety: What to Do in the Next Ten Minutes

Nobody has ever been warned about an EF4.

The number turns up days afterward, from a survey team walking a damage path with a clipboard, and it describes what the buildings did. Not what the wind was about to do. That is the first thing to straighten out about tornado safety in this country: the famous scale is a receipt, and a receipt is issued after the transaction.

What you get beforehand is thinner and far more useful. A watch, hours ahead, over a wide area. Then, sometimes, a warning — and a number of minutes nobody promises you.

Which collapses the whole subject into one question, and it is not whether this can happen where you live. The National Weather Service notes they have been reported in all 50 states and can occur at any time of day or night and at any time of the year. That settles it. The question is what your household does in the next ten minutes, in the building it actually lives in, with the people who are actually in it.

Most of that answer has to exist before the alert arrives. Not because of any drama about readiness — simply because choosing a room, finding a set of shoes and waking four people takes longer than the warning lasts.

A tornado watch and a tornado warning are two different objects

Most households have these two backwards, or treat them as the same word with different volume. They are not the same word, and they do not ask for the same thing.

The National Weather Service defines the first one simply: under a watch, tornadoes are possible in and near the watch area, and the household job is to review and discuss your emergency plans, take inventory of your supplies, and check your safe room. It adds the detail that explains the geography of the thing — watches are issued by the Storm Prediction Center for counties where tornadoes may occur. A national office, drawing a box over several counties and several hours.

The warning is local, radar-driven and immediate: a tornado has been sighted or indicated by weather radar, and there is imminent danger to life and property. The instruction attached to it is one sentence. Move to an interior room on the lowest floor of a sturdy building, and avoid windows.

The asymmetry between the two is the part worth internalizing. A watch costs you almost nothing to over-respond to: shoes on, phones charged, the car moved out from under the tree. A warning costs you everything to under-respond to. The same two words carry 48 and 36 hours in hurricane preparedness, which is why a coastal household plans in days and this one plans in minutes.

If the vocabulary itself is shaky, the scenario-by-scenario trainer lives on the natural disaster preparedness guide rather than here, and it is worth the three minutes before you read the rest of this page.

Before either one: the outlook nobody reads

There is a stage above both, and it is public, free and almost entirely ignored by households.

The Storm Prediction Center publishes convective outlooks running from Day 1 out to Day 8, with categorical and probabilistic graphics and a discussion for the first three days, and probabilistic forecasts for Days 4 through 8 covering 72 to 192 hours out. The categories climb in a way that reads clearly once you have seen it twice: Marginal for severe storms of limited organization or very low coverage, Slight for organized severe thunderstorms in low coverage, Enhanced for a greater concentration of them, Moderate for the potential for widespread severe weather with several tornadoes, and High when an outbreak is expected from numerous intense and long-track tornadoes or a long-lived derecho.

Moderate and High are not everyday words on that map. When one of them is drawn over your county, you have hours of daylight to work with, which is a completely different resource from the minutes a warning gives.

What I do with that: on an Enhanced day, phones charged and everyone reminded of the room. On a Moderate or High day I decline the evening drive and know where everyone is sleeping.

Where you shelter: decide it tonight, not at 2 a.m.

The preparation guidance is one sentence long and it is the whole game: pick a safe room in your home, such as a basement, storm cellar, or an interior room on the lowest floor with no windows.

Three ideas hide in that sentence: get low, get inside, get away from glass. They trade against each other differently in every building, so walk yours once and settle it.

With a basement, you are done in ten seconds. Go under the stairs or into the corner furthest from the walls the wind is hitting, and stay out from under anything heavy on the floor above: a piano, a refrigerator, a full bathtub.

Without one — a slab or crawl-space house, which is most of the country’s newer housing — you are looking for the geometric middle of the lowest floor. An interior hallway with a door at each end. A bathroom with no exterior wall. The closet under the stairs. Count the walls honestly, because a bathroom that happens to have a window is not an interior room no matter what the floor plan is called.

In an apartment, the lowest floor you can reach quickly beats the best room on your own floor, but only if you can genuinely reach it. An interior stairwell core is the classic answer. If you are on the fourteenth floor and the stairwell is a two-minute descent with a toddler, your room is the interior bathroom, and that is a legitimate answer rather than a failure.

What lives in the room, permanently

One object belongs in whichever room you pick, and it is not a gadget. Put a battery LED lantern^aff. in there permanently, because the phone is your only link outward and it should not be spending the evening as a flashlight. The same logic that runs through the 72-hour emergency kit applies at ten-minute scale.

Then draw the room and count what it actually gives you.

Draw the room before you need it

How many layers are between you and the outside?

Describe the spot you would actually send the household to tonight. The cross-section redraws with every answer, and the count underneath it is read straight off the picture. Debris comes from the left in this drawing, which is as good a direction as any — it arrives from all of them.

The building

House with a basement House on a slab or crawl space Apartment building Workplace, school or store Manufactured or mobile home

Where in it

Below grade Lowest floor One floor up Higher than that

Walls between that spot and the nearest outside wall

None — an outside wall One Two Three or more

Directly overhead

Another floor The roof, directly A wide open-span roof

Glass in the room

No window A window or a glass door

The other half of the room is what you bring into it: shoes, because broken glass is what injures people on the way out, and something over your head, because flying debris is what does the injuring on the way in. Bike helmets already in the house count, and if nobody owns one, fit in the dark is the only criterion worth shopping on — a helmet with a dial adjuster^aff. goes on one-handed. So does a heavy blanket and a mattress pulled over everyone, which costs nothing and has the advantage of being in the building already.

In a manufactured home, the plan is to leave — and to leave early

This is the most important paragraph on the page, and it is the one people argue with.

A manufactured or mobile home is not a shelter with poor odds. It is not a shelter. The National Weather Service’s during-guidance puts sheds and storage facilities in the unsafe column, and then says: neither is a mobile home or tent. The Storm Prediction Center explains the physics without decoration — mobile homes are, in general, much easier for a tornado to damage and destroy than well-built houses.

So the plan is a destination. The preparation page asks you to identify a nearby safe building you can get to quickly, such as a church or family member. Pick it this week, in daylight. Get an address. Confirm the door actually opens at ten at night, or that the neighbor is genuinely home, or that the community shelter has posted hours. A building you have never approached after dark is not a plan.

The second half is the timing, and it is where the rule gets broken. You leave on the watch. Not on the warning — because starting a drive once a tornado has been sighted means spending those minutes in a vehicle, and the same federal guidance says being in a vehicle during a tornado is not safe.

That means you will drive somewhere and sit in a church basement for two hours while nothing happens, several times a season, feeling mildly ridiculous. That is the plan working correctly. Households with livestock or a wheelchair make the identical trade in a wildfire evacuation, where the warning is the order for anyone slow. Keeping a go bag by the door makes the whole thing cost four minutes instead of fifteen, and the go bag checklist has the version that lives in a car.

Anchoring deserves one honest sentence. Tie-downs and ground anchors matter for ordinary high wind and they are worth having, on the condition that the auger reaches undisturbed soil rather than the gravel pad, which is the only thing to check on a ground anchor and strap kit^aff.. They are not a tornado plan, and treating them as one is how a household talks itself into staying.

The arithmetic below is the part that usually ends the argument, because it is nobody’s opinion.

Solved backwards, from your own minutes

Which alert do you actually have to move on?

Add up what your household really spends between finding out and being in place. Then the tool runs that total back up the ladder — warning, watch, outlook — and names the stage you have to be moving at. Most people assume it is the warning. For a good number of households, the arithmetic says otherwise.

Where you are going

A room in this building A sturdy building somewhere else

• Waking everyone and getting them on their feet − 0 min +
• Shoes, glasses, phone, the children in one place − 0 min +
• Getting everyone to the room − 0 min +
• Driving to the building you picked − 0 min +
• Getting inside it and reaching its interior room − 0 min +

What makes it longer

It is the middle of the night +4 Someone needs help to move +6 Animals come with you +3

Total: 9 minutes from finding out to being in place

While you are counting minutes, count the phone too. Anything that lives only on a screen — the address of that building, the neighbor’s number, the insurance policy — disappears at the same moment the power does, which is the argument made at length in everyday carry essentials. A charged portable power bank^aff. kept with the bag covers the first night, and the extended power outage article covers everything after it.

Tornado safety away from home: the car, the overpass, the big-box store

Half of these arrive when the household is not in the house. The guidance changes shape, and one piece of it is a straight contradiction of what most American drivers believe.

In a car, the official line is unsentimental. Being in a vehicle during a tornado is not safe, and the best course of action is to drive to the closest shelter. If you cannot reach one, you either get down in the car and cover your head, or you abandon it and seek shelter in a low-lying area such as a ditch or ravine. Neither option is good. The reason both appear on a federal page is that the vehicle was the mistake, and by then you are choosing between two bad endings.

Under an overpass, never. The Storm Prediction Center’s instruction is do not seek shelter under bridges, and the reasoning is mechanical: winds from some directions accelerate and get stronger when forced into a tight space, debris still reaches people wedged up there, and people have been blown out from underneath. The FAQ walks through fatal examples from the Bridge Creek and Moore tornadoes of 3 May 1999 — which is also, awkwardly, where the myth got its television footage. An overpass has a second failure: the cars stopping under it block the road for everyone still driving out.

At work, at school, in a store, the guidance is to proceed to your tornado shelter location quickly and calmly, and to stay away from windows. Two things follow from that. One, ask where it is before you need it — most large buildings have a designated spot, and most employees have never been told which one. Two, the worst places in a big building are the ones that feel safest: the open middle of a warehouse store, an atrium, a gymnasium, anything under a wide open-span roof. Interior restrooms and stairwells are the answer in nearly every commercial building in America.

Half the people who will need this advice are in sandals. Sturdy work boots or closed-toe shoes^aff. left in the trunk cost nothing to store and solve the single most common injury afterward.

And the aftermath needs its own two objects, which is why a 72-hour kit checklist exists at all. A real first aid kit^aff. — not the twelve-plaster tin — and gloves, because everything you will touch for the next two days has a nail in it, which makes the palm the whole criterion: leather-palm work gloves^aff. rather than the knit pair from the garden shed.

The EF scale is a damage survey, not a forecast

The scale everyone quotes is the one least useful to a household, and it is worth understanding exactly why.

The Enhanced Fujita Scale converts damage into an estimated three-second gust: 65 to 85 mph for EF0, 86 to 110 for EF1, 111 to 135 for EF2, 136 to 165 for EF3, 166 to 200 for EF4, and over 200 mph for EF5. The Storm Prediction Center attaches a warning label to its own product — the Enhanced F-scale still is a set of wind estimates, not measurements, based on damage.

The method behind it is a survey. Teams begin with 28 damage indicators describing typical construction, assign a degree of damage to what they find, read the expected wind speed with its lower and upper bound, and look at more than one structure where they can. The rating reflects the most intense damage found anywhere along the path.

Three consequences for a household

All three are practical.

An EF number is never available in advance. There is no such thing as a forecast EF3, so it cannot appear anywhere in your plan.

A rating describes the worst point on a path, not your street. Two houses a quarter mile apart, in the same rated event, can have completely different mornings.

And the rating is partly a statement about buildings. A tornado that crosses open farmland and one that crosses a subdivision do not get rated on the same evidence, which is one of the reasons the historical record is a slippery thing to reason from.

How a warning reaches you at two in the morning

Everything above assumes you find out. That assumption is where American tornado safety actually fails, and it fails at night.

The guidance is explicit that you should know how your community sends warnings, noting that some communities have outdoor sirens while others depend on media and smartphones. Take each of those in turn, at 2 a.m., honestly.

Outdoor sirens were designed for people who are outdoors. Through a closed window, a running air handler and a sleeping brain, they are not an alerting system, and they were never sold as one.

A phone is excellent, conditionally. It has to be charged, in the room, not on silent, and with emergency alerts switched on — four conditions, each of which fails on an ordinary Tuesday. It also rides the cell network, which is the first thing to go in a wide event.

Which leaves the one device that starts itself. The National Weather Service asks you to listen to local news or a NOAA Weather Radio to stay informed about watches and warnings, and the reason that receiver keeps being listed separately is the tone alert: it sits switched off until a coded message for your county arrives, then makes noise in your bedroom. How to choose one, and why the county code matters more than any other feature, is worked through in emergency weather radio — including the part where a radio without SAME coding gets unplugged within a month because it screams for the next county over.

Two more habits, neither of which costs anything. Run the household drill the guidance asks for, so that everyone knows what to do if a tornado is approaching — one walk to the room, out loud, badly, is enough to reveal that the door is blocked by a laundry basket. And keep a hand-crank emergency radio in the kit for the days after, since the alerting receiver and the listening receiver are genuinely two objects: a hand-crank and solar emergency radio^aff. is what tells you which roads are open on day three.

What I would do tonight, in about twenty minutes

Walk the building once and say the room out loud, with everyone in it. Move whatever is stored in it that would have to be moved first.

Put shoes, a lantern and something for heads in that room, and leave them there. They are allowed to be ugly.

Write the plan on the same sheet as the rest of the household paperwork — where you go, who wakes whom, which relative everyone texts — and keep a paper copy, because the reasoning in why 72 hours applies here in miniature.

If you live in a manufactured home, make the phone call that turns “somewhere sturdy” into an address, and drive there once this week while it is light.

Then leave it alone. That is the part I would defend hardest: this is not a hobby and it does not want a season pass. Twenty minutes tonight buys you the one thing the warning cannot give you, which is the ability to spend its entire duration doing nothing but moving. The rest of the household’s plans, hazard by hazard, are in the blog.