Blizzard
A severe winter weather condition characterized by low temperatures and strong winds blowing a great deal of snow. The National Weather Service defines a blizzard as having wind speeds of 35 mph or more, with visibility of less than a quarter mile. Sometimes a condition known as a whiteout can occur during a blizzard. This is when the visibility drops to zero because of the amount of blowing snow.

Heavy snow
Meteorologists define heavy snow as six inches or more falling in less than 12 hours, or snowfall of eight inches or more in 24 hours.

Sleet
Frozen raindrops that bounce when hitting the ground characterize sleet. Sleet occurs when the air near the clouds is above freezing, but a thick layer of air near the ground is below freezing, so that the rain freezes as it falls. If the below-freezing layer of air near the ground is not very thick, the raindrops will not have time to freeze on the way down, and ice storm conditions will occur.

Ice Storm
An ice storm occurs when rain freezes after it hits the ground. This happens because the air near the clouds is warm enough for precipitation to fall as rain, but temperatures at ground level are below freezing. Ice storms cause ice to accumulate on roads, trees, and power lines. This situation is extremely dangerous due to icy roads and downed power lines.

Wind Chill
Wind blowing across your body makes you feel colder. The wind chill factor is a measure of how cold the combination of temperature and wind makes you feel. Wind chill of 50° or lower can be very dangerous – exposed skin can develop frostbite in less than a minute, and a person or animal could freeze to death after just 30 minutes of exposure.

Winter Weather Driving

Factsheet: Winter Driving

The leading cause of death during winter storms is transportation accidents. Preparing your vehicle for the winter season and knowing how to react if stranded or lost on the road are the keys to safe winter driving.

BEFORE

Have a mechanic check the following items on your car.

• Battery
• Antifreeze
• Wipers and windshield washer fluid
• Ignition system
• Thermostat
• Lights
• Flashing hazard lights
• Exhaust system
• Heater
• Brakes
• Defroster
• Oil level (if necessary, replace existing oil with a winter grade oil or the SAE 10w/30 weight variety)

Install good winter tires.
Make sure the tires have adequate tread. All-weather radials are usually adequate for most winter conditions. However, some jurisdictions require that to drive on their roads, vehicles must be equipped with chains or snow tires with studs.

Keep a windshield scraper and small broom for ice and snow removal.

Maintain at least a half tank of gas during the winter season.

Plan long trips carefully.
Listen to the radio or call the state highway patrol for the latest road conditions. Always travel during daylight and, if possible, take at least one other person.

If you must go out during a winter storm, use public transportation.

Dress warmly.
Wear layers of loose-fitting, layered, lightweight clothing.

Carry food and water.
Store a supply of high energy "munchies" and several bottles of water.

Contact your local emergency management office or American Red Cross chapter for more information on winter driving.

Winter Car Kit
Keep these items in your car:

• Flashlights with extra batteries
• First aid kit with pocket knife
• Necessary medications
• Several blankets
• Sleeping bags
• Extra newspapers for insulation
• Plastic bags (for sanitation)
• Matches
• Extra set of mittens, socks, and a wool cap
• Rain gear and extra clothes
• Small sack of sand for generating traction under wheels
• Small shovel
• Small tools (pliers, wrench, screwdriver)
• Booster cables
• Set of tire chains or traction mats
• Cards, games, and puzzles
• Brightly colored cloth to use as a flag
• Canned fruit and nuts
• Nonelectric can opener
• Bottled water

DURING

IF TRAPPED IN CAR DURING A BLIZZARD

Stay in the car.
Do not leave the car to search for assistance unless help is visible within 100 yards. You may become disoriented and lost is blowing and drifting snow.

Display a trouble sign.
Hang a brightly colored cloth on the radio antenna and raise the hood.

Occasionally run engine to keep warm.
Turn on the car's engine for about 10 minutes each hour. Run the heater when the car is running. Also, turn on the car's dome light when the car is running.

Beware of carbon monoxide poisoning. Keep the exhaust pipe clear of snow, and open a downwind window slightly for ventilation.

Watch for signs of frostbite and hypothermia.

Do minor exercises to keep up circulation.

Clap hands and move arms and legs occasionally. Try not to stay in one position for too long. If more than one person is in the car, take turns sleeping.

For warmth, huddle together.

Use newspapers, maps, and even the removable car mats for added insulation.

Avoid overexertion.
Cold weather puts an added strain on the heart. Unaccustomed exercise such as shoveling snow or pushing a car can bring on a heart attack or make other medical conditions worse. Be aware of symptoms of dehydration.

Wind Chill
"Wind chill" is a calculation of how cold it feels outside when the effects of temperature and wind speed are combined. A strong wind combined with a temperature of just below freezing can have the same effect as a still air temperature about 35 degrees colder.

Winter Storm Watches and Warnings
A winter storm watch indicates that severe winter weather may affect your area. A winter storm warning indicates that severe winter weather conditions are definitely on the way.

A blizzard warning means that large amounts of falling or blowing snow and sustained winds of at least 35 miles per hour are expected for several hours.

Frostbite and Hypothermia
Frostbite is a severe reaction to cold exposure that can permanently damage its victims. A loss of feeling and a white or pale appearance in fingers, toes, or nose and ear lobes are symptoms of frostbite.

Hypothermia is a condition brought on when the body temperature drops to less than 90 degrees Fahrenheit. Symptoms of hypothermia include uncontrollable shivering, slow speech, memory lapses, frequent stumbling, drowsiness, and exhaustion.

If frostbite or hypothermia is suspected, begin warming the person slowly and seek immediate medical assistance. Warm the person's trunk first. Use your own body heat to help. Arms and legs should be warmed last because stimulation of the limbs can drive cold blood toward the heart and lead to heart failure.

Put person in dry clothing and wrap their entire body in a blanket.

Never give a frostbite or hypothermia victim something with caffeine in it (like coffee or tea) or alcohol. Caffeine, a stimulant, can cause the heart to beat faster and hasten the effects the cold has on the body. Alcohol, a depressant, can slow the heart and also hasten the ill effects of cold body temperatures.

Winter Weather Preparedness

Winter Preparedness Safety Tips

Timely preparation, including structural and non-structural mitigation measures to avoid the impacts of severe winter weather, can avert heavy personal, business and government expenditures. Experts agree that the following measures can be effective in dealing with the challenges of severe winter weather:

BEFORE SEVERE WEATHER ARRIVES

• Store drinking water, first aid kit, canned/no-cook food, non-electric can opener, radio, flashlight and extra batteries where you can get them easily, even in the dark.
  
  
• Keep cars and other vehicles fueled and in good repair, with a winter emergency kit in each.
  
  
• Get a NOAA Weather Radio to monitor severe weather.
  
  
• Know how the public is warned (siren, radio, TV, etc.) and the warning terms for each kind of disaster in your community; e.g.:
  
  
  • "winter storm watch" --- Be alert, a storm is likely
  • "winter storm warning" --- Take action, the storm is in or entering the area
  • "blizzard warning" --- Snow and strong winds combined will produce blinding snow, near zero visibility, deep drifts, and life-threatening wind chill--seek refuge immediately!
  • "winter weather advisory" --- Winter weather conditions are expected to cause significant inconveniences and may be hazardous, especially to motorists
  • "frost/freeze warning" --- Below freezing temperatures are expected and may cause damage to plants, crops, or fruit trees
  • "flash flood or flood watch" --- Be alert to signs of flash flooding and be ready to evacuate on a moment's notice
  • "flash flood warning" --- A flash flood is imminent--act quickly to save yourself because you may have only seconds
  • "flood warning" --- Flooding has been reported or is imminent--take necessary precautions at once
    
    
• Know safe routes from home, work and school to high ground.
  
  
• Know how to contact other household members through a common out-of-state contact in the event you and have to evacuate and become separated.
  
  
• Know how to turn off gas, electric power and water before evacuating.
  
  
• Know ahead of time what you should do to help elderly or disabled friends, neighbors or employees.
  
  
• Keep plywood, plastic sheeting, lumber, sandbags and hand tools on hand and accessible.
  
  
• Winterize your house, barn, shed or any other structure that may provide shelter for your family, neighbors, livestock or equipment. Install storm shutters, doors and windows; clear rain gutters; repair roof leaks; and check the structural ability of the roof to sustain unusually heavy weight from the accumulation of snow--or water, if drains on flat roofs do not work.
  
  
• If you think you might want to volunteer in case of a disaster, now is the time to let voluntary organizations or the emergency services office know--beforehand.

DURING ANY STORM OR EMERGENCY

• Monitor your NOAA Weather Radio or keep a local radio and/or TV station on for information and emergency instructions.
  
  
• Have your emergency survival kit ready to go if told to evacuate.
  
  
• If you go outside for any reason, dress for the season and expected conditions:
  For cold weather, wear several layers of loose-fitting, lightweight, warm clothing rather than one layer of heavy clothing. Outer garments should be tightly woven and water-repellent. Mittens are warmer than gloves. Wear a hat. Cover your mouth with a scarf to protect your lungs from extremely cold air. Wear sturdy, waterproof boots in snow or flooding conditions.
  
  
• If advised to evacuate, tell others where you are going, turn off utilities if told to, then leave immediately, following routes designated by local officials.

DURING A FLOOD

• Avoid areas subject to sudden flooding.
  
  
• Do not try to walk across running water more than 6 inches deep; even 6 inches of rapidly running water can sweep you off your feet.
  
  
• Do not drive into flooded areas. If your car stalls, abandon it immediately--if you can--and seek higher ground.

DURING A WINTER STORM

• Conserve fuel, if necessary, by keeping your house cooler than normal. Temporarily shut off heat to less-used rooms.
  
  
• If using kerosene heaters, maintain ventilation to avoid build-up of toxic fumes. Keep heaters at least three feet from flammable objects. Refuel kerosene heaters outside.
  
  
• Avoid travel if possible. If you must travel, do so during daylight. Don't travel alone. Stay on main roads, and keep others informed of your schedule.

IF A BLIZZARD TRAPS YOU IN YOUR CAR

• Pull off the road, set hazard lights to flashing, and hang a distress flag from the radio aerial or window. Remain in your vehicle; rescuers are most likely to find you there.
  
  
• Conserve fuel, but run the engine and heater about ten minutes each hour to keep warm, cracking a downwind window slightly to prevent carbon monoxide poisoning. Exercise to maintain body heat but don't overexert. Huddle with other passengers and use your coat for a blanket.
  
  
• In extreme cold use road maps, seat covers, floor mats, newspapers or extra clothing for covering--anything to provide additional insulation and warmth.
  
  
• Turn on the inside dome light so rescue teams can see you at night, but be careful not to run the battery down. In remote areas, spread a large cloth over the snow to attract the attention of rescue planes.
  
  
• Do not set out on foot unless you see a building close by where you know you can take shelter.
  
  
• Once the blizzard is over, you may need to leave the car and proceed on foot. Follow the road if possible. If you need to walk across open country, use distant points as landmarks to help maintain your sense of direction.

AFTER THE STORM

• Report downed power lines and broken gas lines immediately.
  
  
• After blizzards, heavy snows or extreme cold, check to see that no physical damage has occurred and that water pipes are functioning. If there are no other problems, wait for streets and roads to be opened before you attempt to drive anywhere.
  
  
• Check on neighbors, especially any who might need help.
  
  
• Beware of overexertion and exhaustion. Shoveling snow in extreme cold causes many heart attacks. Set your priorities and pace yourself after any disaster that leaves you with a mess to clean up. The natural tendency is to do too much too soon.

RETURNING TO YOUR HOME AFTER A FLOOD

• Do not turn electricity back on if you smell gas or if the electric system has been flooded.
  
  
• Wear sturdy work boots and gloves.
  
  
• Do not handle electric equipment in wet areas.
  
  
• Use flashlights, not lanterns, candles or matches, to check buildings containing natural gas, propane, or gasoline.
  
  
• Follow directions from local officials regarding the safety of drinking water.
  
  
• Clean and disinfect everything that was touched by flood waters and throw out any such foodstuffs.
  
  
• If you want to help other victims, give cash donations to the appropriate relief agencies to buy what the victims need. Donated goods such as used clothing, unlabeled and unsorted by size, are usually more of a logistical problem than a help. If particular items are needed, there will be public announcements and instructions concerning these.
• Don't go to the disaster scene on your own to volunteer. If you are already a volunteer, you will know where you are to report. If additional volunteers are needed for labor-intensive work like sandbagging, public announcements will be made.