NOAA’s National Weather Service

Let’s Get Started!

Something you shouldn’t do

Highway Overpasses

Class Goals

Wall Cloud & Shelf Cloud

Basic Spotter Rules

Hazards to report

Reports

Hailstone

Hail Reporting

Estimating Wind Speed

Before you submit your report:

Reports

Thunderstorm Structure

…where wall clouds and shelf clouds are found

…when you see a shelf cloud, you’re thinking straight-line winds and maybe some large hail and heavy rains

Quick Storm Introduction

Thunderstorms

Downdraft - Downburst

Shelf Cloud Formation

Tornadic Supercell Tstm

Tornadic Supercell Tstm

Multi-cell Thunderstorm

Thunderstorms

Downburst Winds

Shelf Clouds

Downburst Winds

Shelf Clouds

Shelf Clouds

Downburst!

Bow Echo – downburst!

Bow Echo – downburst!

Bow Echo – downburst!

Downburst Winds

Break Time!
10 minutes

Tornadoes & Wall Clouds

Rotating Wall Clouds

Thunderstorms

Tornado

Hard-to-See Tornado

Wall Clouds

Wall Clouds vs. Shelf Clouds

Updraft & Downdraft

Wall Clouds

Wall Clouds

Wall Clouds

Wall Clouds

Wall Clouds

Wall Clouds

Wall Clouds

Wall Cloud Attachment - Tail Cloud

Wall Cloud Becomes Shelf Cloud

Funnel Clouds

Quiz Time

Quiz Time (continued)

Tornadoes across the state

Relative Frequency of Events

2004 Wisconsin Tornadoes

Waupun Supercell   6-23-04

DeForest Tornado May 23, 2004

Tornado

Tornadoes

Tornadoes

Tornadic Supercell Tstm

Supercell Wall Cloud

Tornadoes

Tornadoes

Supercell & Tornado!

Tornadoes

Mesocyclone

Oakfield Tornado

Tornado

Tornado

Tornado

Tornadoes

Common Deceivers