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Videos of the Violent EF4 and EF5 Tornadoes on April 27, 2011
Tornado Outbreaks Tornado Videos

Videos of the Violent EF4 and EF5 Tornadoes on April 27, 2011

April 27, 2011 brought 15 violent tornadoes to the South, including four EF-5s. We've documented their paths and have collected…
Ian Livingston
Tornado Threat Forecast

Tornado Threat Forecast: Apr 26-May 2, 2012

1-3 DAY Forecast FAQ Thursday Central High Plains — POTENTIAL: Low — CONFIDENCE: Normal Moderate to strong shear and low…
Mark Ellinwood
The April 2011 Super Outbreak
Tornado Maps Tornado Must Reads Tornado Outbreaks

The April 2011 Super Outbreak

2011 was a rough reminder that we have not solved the tornado problem. The blockbuster event of a blockbuster year,…
Ian Livingston
Tornado Climatology

April tornado deaths since 1950

Although May and June average more tornadoes than April does, April is the leader of all months when it comes…
Ian Livingston
Tornado Threat Forecast

Tornado Threat Forecast: April 23-29, 2012

1-3 DAY Monday No tornadic activity expected. Tuesday Eastern Missouri, southwestern Illinois — POTENTIAL: Very Low — CONFIDENCE: Normal There…
Mark Ellinwood
Tornado Weekly: April 15-21, 2012
Tornado Digest

Tornado Weekly: April 15-21, 2012

The week began with significant potential a day after a major outbreak, but that potential failed to materialize. Otherwise quiet,…
Ian Livingston
Tornado Reports are Reports, Not Tornadoes
Tornado Education Tornado Outbreaks

Tornado Reports are Reports, Not Tornadoes

Look at all those dots! SPC heavily notes they are "reports," yet over and over these reports are called individual…
Ian Livingston
Tornado Threat Forecast

Tornado Threat Forecast: Apr 19-25, 2012

1-3 DAY Forecast FAQ UPDATE: Added southern Florida risk area for Saturday. Thursday Iowa, northern Missouri — POTENTIAL: Very Low…
Mark Ellinwood
Tornado Climatology

Significant April Tornadoes in the United States

Out of 7,885 tornadoes total in April (1950-2011), 2,161 — or 27% — were rated as significant F2/EF-2+ tornadoes. In…
Ian Livingston
April 14, 2012 Tornado Outbreak Regional Radar and Visible Satellite Loops
Tornado Outbreaks

April 14, 2012 Tornado Outbreak Regional Radar and Visible Satellite Loops

Full event loop of regional radar + daytime loop of visible satellite. A quick way to relive the only major…
Ian Livingston
Tornado Threat Forecast

Tornado Threat Forecast: April 16-22, 2012

1-3 DAY Monday Northern Mid-Atlantic — POTENTIAL: Very Low — CONFIDENCE: High Storms forming along and ahead of a cold…
Mark Ellinwood
Tornado Weekly: April 8-14, 2012
Tornado Digest

Tornado Weekly: April 8-14, 2012

A much-touted tornado outbreak arrived on April 14 as a strong upper-level low pushed out into the Plains. Kansas was…
Ian Livingston

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