Red Cross Central Illinois Chapter

Winter Weather Glossary of Terms

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

  • "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.

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.

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