1. SqualL Line Worst is first Most common from multicell storms
Right ahead of precipitation
Tornadoes are rare
Stretch a long ways
“In the whales mouth”
Under the shelf cloud
Very turbulent air
Roll Cloud
Type of shelf cloud
Rotating on horizontal axis

2. Shelf cloud develops here
Rain cooled air sweeps out in front of the storm

3. In the whale’s mouth Griffith, IN 7/24/16
Griffith, IN
7/24/16

4.
Roll Cloud

5. Gustnado Ground based short lived dust whirl
Not connected to the cloud base
Usually along the leading edge of the storm

6. Derecho
Widespread long-lived wind storm associated with a band of rapidly moving thunderstorms.
Swath of severe winds

7. Green skies and tornadoes?
Doesn’t mean tornadoes will form
Green skies happen due the hail interacting with the sunlight
Green skies = hail

8. Flash floods NOT considered severe
12” of rushing water can move ANY vehicle
Often kill more people than severe weather