Severe Weather Lesson

1
Severe Weather Lesson

• Eric Ghiggia
• CS255

2
Severe Weather Topics

• Winter Storms
• Thunderstorms
• Tornadoes
• Floods

3
Watch vs. Warning

• A watch is when conditions are favorable for
  producing severe weather.
• A warning is when severe weather has been
  observed or indicated on radar.

4
Winter Storms

• Winter storms can include blizzards, sleet, wind
  chills, and snow. During a winter storm you need
  to be careful of frostbite and hypothermia.
  Frostbite is the loss of feeling and pale
  appearance of the fingers, toes, nose, or ear
  lobes.

5
Winter Storms Cont.

• The link below shows how the wind plays a role in
  making the temperature cooler.
• Wind Chill Chart

6
Thunderstorms

• A severe thunderstorm is defined as a
  thunderstorm that contains hail that is at least
  ¾ of an inch in diameter, and/or winds that are
  58 mph or greater, and/or tornadoes.
• The United States has around 100,000
  thunderstorms a year, producing 20 million
  lightening strikes.

7
Tornadoes

• A tornado is a violent rotating column of air
  extending from a cloud to the surface of the
  earth.
• Tornadoes are usually produced by severe
  thunderstorms.
• The United States has the highest number of
  tornadoes in a year with 1,000 per year.

8
Floods

• Flooding can occur when there is a chance of rain
  for a long period of time.
• Floods are the most common and widespread of all
  natural disasters.
• Each year floods cause billions of dollars of
  damage.

9
More Weather Information

• Weather.com
• National Severe Storms Laboratory