A tornado or severe thunderstorm warning means a tornado or severe thunderstorm has been reported or is indicated by weather radar. Warnings are issued for counties and/or communities. Warning information includes the tornado’s location, direction and speed. If the warning is for your area, you must take shelter immediately.
Learn the location of designated shelters at work, school, and in other public buildings you frequent. Designate a tornado shelter in your home or building. Be sure all family members know where and when to seek shelter. Make sure to take a battery-powered radio to your shelter location when a warning has been issued.
What to Do at Home
If you are at home when a tornado or severe thunderstorm warning is issued, take shelter immediately. Go to the basement and seek shelter under the stairs or sturdy furniture. If you do not have a basement, seek shelter in a small room at the lowest level, in the center of the building. Bathrooms and closets are good potential shelters. Avoid rooms with windows.
Manufactured homes are extremely vulnerable to the effects of tornadoes and severe thunderstorms. One third of tornado deaths nationwide occur in manufactured homes. Residents of manufactured home parks should have a shelter in the park or a plan for residents to evacuate to an off-site shelter location. Find out about the tornado shelter plan in your park. If there is no time to get to shelter, abandon the manufactured home and lie flat in the nearest ditch or depression with your hands covering your head.
Your Home Shelter
If you live in a traditional northern home with a basement, you have an excellent potential shelter. Take a few minutes to select and prepare a good spot in your basement in case a tornado strikes your community.
When you choose your basement shelter location, take these factors into consideration:
Make sure all family members know the shelter location. Conduct a family tornado drill to test your plan.
What to Do away from Home
Some basic tornado safety rules apply if a tornado threatens when you are not at home.
Thunderstorms also can produce strong wind gusts. These straight-line winds have been known to reach 100 miles an hour and produce tornado-like damage. Treat severe thunderstorms just as you would tornadoes. Move to an appropriate shelter if you are in the path of a severe storm.
The strong rush of wind from a thunderstorm is called a downburst. One of the primary causes is rain-cooled air. The rain-cooled air accelerates rapidly downward, producing a potentially damaging gust of wind.
Strong downbursts are often mistaken for tornadoes. They are often accompanied by a roaring sound similar to a tornado. Downbursts can easily overturn mobile homes, tear roofs off houses and topple trees.
Lightning kills an average of 100 people in the United States each year, and it injures many more. If you can hear thunder, you are close enough to the storm to be struck by lightning. Lightning can strike the ground 10 to 12 miles from the storm that causes it.
The most likely places for people to be killed by lightning are ball fields, golf courses, boats, and tractors without cabs. Do not use metal objects such as fishing rods or golf clubs when lightning is threatening. Stop tractor work, dismount and seek shelter. If you are boating or swimming, get to land and find shelter at least 100 yards from shore.
The steel frame of an enclosed, hardtop car provides increased protection if you are not touching metal. If you are caught outside, don’t sit down or lie on the ground — you make a larger target! Crouch low to the ground, with your hands on your knees and your head between them. If you are in a group, stay at least 15 feet apart. Avoid seeking shelter under a lone tree.
A person struck by lightning carries no electrical charge and can safely be handled. A person injured by lightning has received an electric shock and may be burned, both where the strike occurred and where the electricity left the body. If breathing has stopped, begin rescue breathing. If the heart has stopped, a trained person should give CPR. Call 9-1-1 immediately.
If you are inside, avoid talking on a corded telephone or touching electrical appliances that are plugged into the wall. Avoid taking a bath or shower, or running water for any purpose. Lightning that strikes wiring or plumbing can travel on to you.
A thunderstorm that produces large amounts of rain in a short time may cause flash floods. Flash flooding is the number one killer associated with thunderstorms; nearly 140 fatalities occur nationally each year. Seventy-five percent of flash flood fatalities occur at night. Half of the victims die in automobiles or other vehicles. Two feet of running water is enough to carry away most vehicles. Many deaths occur when persons purposely drive around barricades indicating that the road is washed out ahead.
In mid-summer, 2006, 8-10 inches of rain fell over Owatonna, Minnesota one late afternoon and evening. Flash flooding from these rains forced the evacuation of a motel filled with more than 75 guests and damaged 18 other homes and businesses in the area.
Emergencies such as tornadoes can change lives in an instant. While you cannot prevent tornadoes, thunderstorms and blizzards, you can take action in advance to reduce the impact of these potential disasters. Your chances of survival and recovery increase dramatically if you plan ahead for all types of disasters.
Clouds and sunshine
Overcast with periods of snow and rain late with little or no accumulation
Cloudy with a touch of rain
A passing shower in the evening; otherwise, low clouds
Intervals of clouds and sun
Low clouds, then perhaps some clearing
Plenty of sun
Mild with plenty of sun
Cloudy and colder
A little snow in the evening; otherwise, mostly cloudy and colder