Tornado Myths Debunked
Tornado myths debunked: green sky, opening windows, southwest corners, overpasses, river crossings. What's true and what's dangerous fiction.
Myth #1: Tornadoes Don't Cross Rivers
COMPLETELY FALSE
Tornadoes cross rivers routinely
Even Mississippi River doesn't stop them
1925 Tri-State crossed Mississippi
River offers no protection whatsoever
Myth #2: Open Windows to Equalize Pressure
COMPLETELY FALSE - DANGEROUS
Pressure change is not what damages homes
Wind pressure damages structures, not internal pressure
Open windows let wind enter and destroy from inside
Never open windows - always close them
Myth #3: Tornadoes Come from Southwest
MOSTLY TRUE but not always
60-70% do move northeast
But direction varies significantly
Cannot rely on direction assumption
Take shelter regardless of direction
Myth #4: Overpasses Provide Shelter
COMPLETELY FALSE - DANGEROUS
Wind speeds INCREASE under bridges
Debris flies through opening
Multiple deaths documented at overpasses
Never take shelter under overpass
Myth #5: Cities Repel Tornadoes
COMPLETELY FALSE
Multiple cities have been struck
2020 Nashville, 2011 Joplin, 2013 Moore
Downtown Fort Worth 2000
Cities are not tornado-repellent
Myth #6: Tornadoes Only Hit Mobile Home Parks
COMPLETELY FALSE
Mobile homes are vulnerable but tornadoes hit everywhere
Random distribution of storms
Mobile home damage more visible but all homes at risk
Myth #7: You Can Outrun Tornadoes
USUALLY FALSE
Tornadoes move 30-70+ mph
Traffic slows down escape
Debris blocks roads
Sheltering is nearly always better
Myth #8: Green Sky Means Tornado
PARTIALLY TRUE
Green sky indicates hail-laden storm
Not all green skies produce tornadoes
Some tornadoes occur without green sky
Not a reliable indicator alone
Myth #9: Basement Is Always Safest
MOSTLY TRUE with caveats
Basement is excellent shelter
But not all basements are equal
Under stairs or central corner safer than open basement
Storm shelters even better
Myth #10: Warnings Always Come Before Tornadoes
MOSTLY TRUE now
Modern warnings: 85% detection rate
But rapid-onset events can catch unprepared
Always be prepared regardless
Multiple warning sources needed
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Place an EF0–EF5 tornado anywhere in the world and see modeled fatalities, structural damage, and economic loss based on real census data.
Launch simulator →