Severe weather thunderstormandtornadoPresentation Transcript
Thunderstorms are storms with lightning and thunder. Tornadoes can also form during thunderstorms.
Lightning is static When the difference is electricity. large enough, the Negatively charged particles try to connect particles gather in the to each other. cloud. Positively charged particles gather on the ground.
1. Cumulus Stage Rising humid air forms a cumulus cloud. The condensation continues. The updraft keeps the rain particles in the cloud. The cloud continues building into a cumulonimbus cloud.
At a Cold Front Within an Air Mass Air is forced up quickly. Uneven heating can This creates a cause convection cumulonimbus cloud thunderstorms. quickly. Remember convection is the rising and falling of air in a cycle.
A tornado is a violently rotating column of air stretching from a cloud to the ground. You cannot see the air moving. What you DO see is the things that the tornado has picked up or water droplets.
More tornadoes occur in North America than any other place in the world. Warm air from the Gulf of Mexico moves north and meets cold air masses.
Most tornadoes Small; last only a few minutes May break branches or ruin billboards 20% of tornadoes Knock over large trees Lift cars up 1% of tornadoes Completely demolish sturdy buildings
The path of the tornado is impossible to predict. The tornado moves at the same pace as the thunderstorm it is attached to.
The National Weather Service issues a “tornado watch” when conditions are right to form tornadoes. A “tornado warning” is issued when a tornado has been detected.