SPWO
Each year, Texas A&M Forest Service and the National Weather Service watch for an extremely dangerous fire weather phenomenon known as a Southern Plains Wildfire Outbreak, or SPWO.
An SPWO event is a force of nature, and much like a hurricane or tornado, it cannot be stopped. Since 2005, SPWO fires account for 3% of reported wildfires but have accounted for 49% of the acres burned.
The environment favorable for an SPWO is dry vegetation and clear, sunny skies.
Under these conditions, wildfires could spread at rates of 3-5 miles per hour or more with flame lengths of 10-12 feet. This equates to flames the height of a one-story building burning the length of a football field in one minute.
Historically, SPWO events happen more often during La Niña years. This is because La Niña conditions mean warmer than normal, and drier than normal, conditions for Texas during winter and spring, increasing the potential for high impact wildfire weather and SPWO events.
Explore additional SPWO products such as public service announcements, flyer and graphics download, and more.
Wildfire alert
We issue a Wildfire Alert when significant wildfire potential is high to very high for a specific region(s) of the state. This represents a high probability that a significant wildfire will occur in the specific region within the next 24 hours. Significant wildfires are very resistant to control and create a threat to public safety and property.
What are freeze cured grasses?
As winter arrives and temperatures drop, the growing season ends, causing grasses to turn brown, dry out, and enter a dormant state. During this period, grasses are no longer actively growing, meaning they do not replenish or maintain their moisture levels like they do when they are green.
Frozen and cured grasses dry out rapidly, making them highly susceptible to ignition from even a small spark, starting a wildfire. Grass fires can spread quickly, putting residents and entire communities at risk.