Tags Tornadoes

Tag: Tornadoes

Tornadoes – Introduction

A tornado is a violently rotating column of air, pendant from a cumuliform cloud or underneath a cumuliform cloud, and often (but not always) visible as a funnel cloud.

Tornadoes – Vulnerability/Risk Assessment

Damage from tornadoes has been growing - a trend that’s been driven chiefly by the increase of people and property in vulnerable areas, like the tornado belt.

Oklahoma City’s Tornado Siren Policy

If you live in Oklahoma City, you need to be aware of the way the city uses their outdoor warning sirens.

Tornadoes – Mitigation (Actions Before, During, After)

Tornadoes can happen at any time of the year, and at any time during the day or night. There are certain recommended actions that help you through each stage of a Tornado emergency.

Tornadoes – Warning Alert Notifications

Tornado notifications issued by the National Weather Service's (NWS) Storm Prediction Center (SPC) in Norman, Oklahoma are in the order of severity: Tornado Watch, PDS Tornado Watch, Tornado Warning, PDS Tornado Warning, Tornado Emergency.

Tornadoes – Types and Classifications

Tornadoes come from mainly two types of thunderstorms: supercell and non-supercell. Tornadoes that come from a supercell thunderstorm are the most common, and often the most dangerous. A rotating updraft is a key to the development of a supercell, and eventually a tornado. Non-supercell tornadoes are circulations that do not form from organized storm-scale rotation.

Track of the May 20, 2013 Norman, OK EF-5 tornado

The May 20, 2013 twister in Moore, Okla., struck a devastating blow to a region hit by five tornadoes in 15 years, including the...
Wedge Tornado Binger. OK 1981

A ‘wedge’ tornado in Binger OK, on 22 May 1981. ‘Wedge’ is informal storm observers’ slang for a tornado which looks wider than the distance from ground to ambient cloud base. Although many famous ‘wedge’ tornadoes have also been violent, producing EF4-EF5 damage on the Enhanced Fujita scale, a tornado’s size does not necessarily indicate anything about its strength.

How a tornado forms

Graphical representation of the wind and thunderstorm conditions that create a tornado.

Tornado Frequency 2003-2012

This intensity map represents the amount of days per year with a reported tornado between 2003 and 2012.