U.S. Severe Weather Blog

This blog is intended to facilitate communication about the impacts of selected severe weather events, particularly major tornadoes, in the United States in near-real-time. We hope it will allow us to assist media, forecasters, researchers, emergency managers, and other interested parties to understand what we at the NOAA Weather Partners in Norman, Oklahoma have been able to gather about the events. We also hope to include information that puts recent events into historical perspective and provide guidance about how to interpret the record of reported events.

This blog is not intended to provide critical weather forecast information. For that, go to the National Weather Service Offsite link warning, especially the Storm Prediction Center Offsite link warning for national guidance, and your local National Weather Service Forecast Office for local information. Find it here Offsite link warning. Nor is this intended to provide information on a broad range of research topics associated with severe weather. For that, go to the National Severe Storms Laboratory Offsite link warning.

The “shape” of the 2009 tornado season

Jun 22nd, 2009 | By Harold Brooks

One of the interesting questions that comes up every year is how to compare a tornado season with previous seasons. In 2009, that question has come up particularly in light of the quiet conditions lately. One way to do this is to start by adjusting historical reports for the long-term “inflation” in reports. If we […]


Quiescent Conditions

May 22nd, 2009 | By Greg Carbin

Unusually quiet weather conditions for this time of year continue into the weekend.


Anatomy of a Well Forecast Bow Echo, Part II

May 14th, 2009 | By Greg Carbin

A cautionary note about deterministic guidance from high-resolution NWP models.


Anatomy of a Well Forecast Bow Echo

May 11th, 2009 | By Greg Carbin

A remarkable forecast of severe storms last Friday, May 8, 2009.


April 9, 2009 Severe Weather Potential

Apr 9th, 2009 | By Greg Carbin

A look at an unfolding severe weather event and some new forecast techniques.


US Annual Tornado Death Tolls, 1875-present

Mar 1st, 2009 | By Harold Brooks

We frequently get asked, “how many…” occur each year. One of the most common of those questions involves tornado deaths. Here’s the raw data.


The relationship between preliminary and final tornado reports

Feb 13th, 2009 | By Harold Brooks

The relationship between the preliminary and final counts of tornadoes is not as straightforward as it seems.


The rarity of the Oklahoma tornadoes of 10 Feb revisited

Feb 13th, 2009 | By Harold Brooks

The question of how rare an event the Oklahoma tornadoes of 10 February 2009 is very difficult to answer.


Widespread Severe Thunderstorm Winds for a February Day

Feb 12th, 2009 | By Greg Carbin

The number of severe thunderstorm wind reports on Wed. Feb. 11, 2009 is unusual for so early in the year.


How rare was the Oklahoma City-Edmond tornado of 10 Feb 2009?

Feb 10th, 2009 | By Harold Brooks

Tornadoes as far west or farther west than the Oklahoma City-Edmond tornado have occurred rarely in January or February since 1950.