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Fall Severe Weather Awareness
 
Although most people associate the spring months with severe weather, Arkansas typically experiences a secondary severe weather season in the fall or early winter about two years out of every three.

 

The WSR-88D (Doppler Weather Radar) showed areas of strong rotation with tornadoes produced on 11/27/2005. Tor #1 tracked through Blackwell (Conway County), Tor #2 hit Cherry Hill (Perry County) and Plumerville (Conway County) and Tor #3 affected areas near Pearcy (Garland County).  By the time the event was over, two dozen tornadoes were counted. In the years 2001, 2002, 2004, 2005, and 2014, tornadoes were most prevalent across the state in the fall. In 2009 and 2015, there were about the same number of tornadoes in the fall as in the spring. The deadliest tornado of 2010 was spawned on December 31st in Washington County. Four fatalities resulted.
In the picture: The WSR-88D (Doppler Weather Radar) showed areas of strong rotation with tornadoes produced on 11/27/2005. Tor #1 tracked through Blackwell (Conway County), Tor #2 hit Cherry Hill (Perry County) and Plumerville (Conway County) and Tor #3 affected areas near Pearcy (Garland County). By the time the event was over, two dozen tornadoes were counted.

 

People who have lived in Arkansas awhile likely remember December of 1982, when tornado outbreaks hit on December 2nd and again on Christmas Eve.

 

In 2008, the Super Tuesday Tornado Outbreak unfolded on February 5th. One long track tornado claimed thirteen lives. A tornado approached Clinton (Van Buren County) from the southwest toward sunset on 02/05/2008. The tornado tracked a state record 122 miles through seven counties, and was responsible for thirteen fatalities. The photo is courtesy of Josh Smith.
In the picture: A tornado approached Clinton (Van Buren County) from the southwest toward sunset on 02/05/2008. The tornado tracked a state record 122 miles through seven counties, and was responsible for thirteen fatalities. The photo is courtesy of Josh Smith.

 

This home on Main Street in Beebe (White County) resembled a doll house (rooms visible from the outside) after it was hit by a tornado on 01/21/1999. This was one of fifty six tornadoes spawned during this outbreak, mainly along the Interstate 30 and U.S. Highway 67/167 corridors. It remains the largest outbreak in state history. In 1999, the big tornado outbreak was on January 21st. In 2012, tornadoes were most numerous on January 22nd. A year later, five tornadoes occurred on January 29th.
In the picture: This home on Main Street in Beebe (White County) resembled a doll house (rooms visible from the outside) after it was hit by a tornado on 01/21/1999. This was one of fifty six tornadoes spawned during this outbreak, mainly along the Interstate 30 and U.S. Highway 67/167 corridors. It remains the largest outbreak in state history.

 

 

In 2009, fifteen tornadoes were counted in mainly southern Arkansas on October 29th. This event featured widespread serious flooding. The WSR-88D (Doppler Weather Radar) showed strong rotation and a possible tornado approaching areas between Camden (Ouachita County) and Locust Bayou (Calhoun County) at 328 pm CDT on 10/29/2009.
In the picture: The WSR-88D (Doppler Weather Radar) showed strong rotation and a possible tornado approaching areas between Camden (Ouachita County) and Locust Bayou (Calhoun County) at 328 pm CDT on 10/29/2009.

 

In the fall and winter, severe weather usually happens when a strong cold front or storm system aloft collides with unusually warm and humid air. It is very important to keep up with the weather if springlike weather is observed when it should be cold. Find out if severe weather watches and warnings are in effect. Typically, many people are caught by surprise when severe storms pop up during the cooler months. That is because these storms are supposed to happen in the spring.

 

Relative frequency of killer tornado events from 1950 to 2004 (adapted from a graphic in a study by Dr. Walker Ashley). The surprise factor of cold season severe storms was mentioned in a 2007 study conducted by Dr. Walker Ashley at Northern Illinois University. According to Dr. Ashley, not being prepared is one reason people are vulnerable to killer tornadoes in this part of the country. Other factors include a high percentage of manufactured homes, heavily forested terrain to block the view of tornadoes, and the close proximity of the Gulf of Mexico to sustain storms well after sunset (while people are asleep).
In the picture: Relative frequency of killer tornado events from 1950 to 2004 (adapted from a graphic in a study by Dr. Walker Ashley).

 

So far in 2018, 30 tornadoes have been confirmed in Arkansas (through October 10th). This is a little below the annual average of 33 tornadoes. The forecast calls for a weak to moderate El Niño to develop through the first half of 2019. The last four occurrences of El Niño led to active weather in the fall.

Given the expected weather conditions, it is reasonable to anticipate at least a few episodes of severe storms this fall. There is an outside chance the state will have its busiest severe weather day of the year as winter approaches.

 

Safety Rules/Other Points
1. Be sure you know the difference between a watch and a warning. The National Weather Service issues a Tornado Watch when tornadoes are possible. A Tornado Warning is issued when a tornado has been indicated on the WSR-88D (Doppler Weather Radar) or has been sighted.
2. Counties and cities are mentioned in Tornado Warnings, so it is a good idea to be familiar with locations near you. If you are new to the area, keep a map handy for reference.
3. Make sure that you have a reliable way to receive weather information. Battery-powered NOAA Weather Radios are an excellent way to keep up with the weather, even if your power has gone out. A battery-powered radio is also a necessity if you are planning to be outdoors.
4. If you are going to be at a large gathering, such as at a school, stadium or place of worship, make sure that someone has been designated to keep an eye on the weather and to listen for the latest watches and warnings.
5. A tornado shelter, tornado cellar, or a safe room is the safest place to be, but most homes do not have these. The next safest place is usually a basement, but these are not common in Arkansas. If you do not have any of these, go to an interior room or hallway on the lowest floor of a house or building. You want to put as many walls as possible between you and the outside. You can protect yourself further by getting under a mattress or a heavy piece of furniture.
6. Many businesses, such as large stores, shopping malls, hospitals, nursing homes, and schools have pre-arranged safety plans and designated safe areas. If you are in one of these places, follow the instructions given inside these buildings.
7. Stay away from windows.
8. If you are in a vehicle, your best option is to move to a sturdy building.
9. Mobile homes, even if tied down, offer little protection during a tornado, and should be abandoned.
 

Remember that flying debris causes the most casualties in a tornado. Hiding under a bridge is not a good idea because you are exposed to flying debris.

Keep in mind that the elderly, the very young, and people with physical or mental challenges will often need more time to get to safety. Make special provisions if you are a care-giver for these people.