Understanding Weather VL

Because it helps people stay safe and prepare for severe weather

Because it helps people predict the exact weather

Because it helps people avoid going outside altogether

Because it helps people ignore minor hazards

Warning < Watch < Advisory

Watch < Advisory < Warning

Advisory < Watch < Warning

Advisory < Warning < Watch

Tornadoes are rotating columns of air that touch the ground and spin extremely fast.

Tornadoes form only over oceans.

Tornadoes last for several hours at a time.

Tornadoes are most common in deserts.

Moisture, unstable air, and a lifting force

Cold air, dry ground, and strong sunlight

High pressure, clear skies, and wind

Snow, ice, and fog

Lightning

Heavy rain

Hail

Calm winds

Heavy rain and flooding

Storm surge

Earthquakes

Tornadoes

Dew point is the temperature at which air becomes saturated and water vapor condenses.

Dew point is always higher than the current temperature.

When air reaches its dew point, fog, dew, or clouds can form.

If current temperature equals dew point, the air is saturated.

The air is completely dry

The air is saturated and cannot hold more water vapor

The air contains half the water vapor it can hold

The temperature is below freezing

Evaporation

Condensation

Rising Air

Cooling