Look out for:

• Dark, often Greenish Sky
• Wall cloud
• Large Hail
• Loud roar; similar to a freight train.

Caution:

Some tornadoes appear as a visible funnel extending only partially to the ground. Look for signs of debris below the visible funnel.

Caution:

Some tornadoes are clearly visible while others are obscured by rain or nearby low-hanging clouds.

Other Thunderstorm Hazards

These dangers often accompany thunderstorms:

• Flash Floods: Number ONE weather killer - 146 deaths annually.
• Lightning: Kills 75-100 people each year.
• Damaging Straight-line Winds: Can reach 140 mph.
• Large Hail: Can reach the size of a grapefruit - causes several hundred million dollars in damage annually to property and crops.