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Because the safest place during a tornado is underground!

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Oklahoma Tornado Shelters

The state of Oklahoma is known as one of the highest risk areas for tornado activity. The state averages 47 tornados annually according to NOAA information. Fatalities of these storms vary year to year but have been exceptionally evident in recent years.

This is an ongoing danger for people in Oklahoma as tornadoes have been known to happen practically anytime year round. Community shelters are developing in some areas but not as quickly in others. Many residents are being urged to consider adding storm protection to their home in the form of a storm or tornado shelter.

Adding an underground tornado or storm shelter to a home ensures family members always have a safe place to go in a weather emergency. Oklahoma now has access to a longer lasting, lower maintenance, more reliable shelter, the Granger ISS. OK residents also have the advantage of dealing with a manufacturer who is experienced and always available for its customers. Families across the United States have chosen the Granger ISS to protect their families from disaster. Consider the statistics of Oklahoma and see why the decision to invest in this life saving home improvement is a choice more and more families are saying yes to.

Tornadoes continue to plague communities all across Oklahoma. Ranging from Moore, Oklahoma City, Tulsa and Elk City- all residents of Oklahoma are at risk of an inclement weather or tornado disaster situation.

Tornado data from 2010 to 2013 is as follows:  (Statistics courtesy of the NOAA)

Oklahoma Tornado Statistics

1947 to 2012 (Statistics Courtesy of the NOAA)

Average Number of Tornadoes Per Year	47
Total Reported Tornadoes from 1950 to 2012	3473
Greatest Number of Tornadoes in a year	145 in 1999
Least Number of Tornadoes in a year	17 in 1988
Average Number of Deaths per Year (OK only)	3
Deadliest Tornado	1947 with 116 deaths and 782 injuries

	2010	2011	2012	2013
Total Number of Tornadoes	103	119	63	72
Estimated Number of Injuries	126	357	51	9
Number of Deaths	3	14	6	33
Path Length of All Tornadoes	610.8 miles	521.6 miles	208 miles	264.1 miles
Average Path Length	6.0 miles	4.4 miles	3.3 miles	3.7 miles
Average Width	92 yards	276.90 yards	200 yards	347.3 yards
Longest Path Length Individual Tornado	13.7 miles	33 miles	16.6 miles	17 miles
Largest Width Individual Tornado	343 yards	1.0 mile	3.9 miles	3.3 miles
Peak Hour of Tornado Occurrence	8 pm - 9 pm	9pm - 10 pm	2 pm - 4 pm
Peak Month of Tornado Occurrence	May	April	April	May
Most Tornadoes In A Day	May 10 (55)	April 14 (33)	April 14 (17)	May 31
Most Number of Tornado Days	15	20	11	12
Number of EF0 Tornadoes	46	59	36	33
Number of EF1 Tornadoes	37	39	25	28
Number of EF2 Tornadoes	14	13	1	7
Number of EF3 Tornadoes	4	4	1	1
Number of EF4 Tornadoes	2	3	0	1
Number of EF5 Tornadoes	0	1	0	2

 

 

America's leading underground Storm Shelter

Granger Industries continues to provide the fastest growing tornado shelter network of high quality, underground shelters. The Granger ISS Tornado Shelter is the only underground shelter that is manufactured by an internationally recognized manufacturing entity. Granger has designed, developed and manufactured industry leading solutions in Aerospace, Defense, Medical, Industrial, Agricultural, Waste Management and so much more. Granger Industries touts world renown engineering innovations and so much more. Granger is also the only storm shelter manufacturer to hold FAA quality certifications.

Watch the story below as the nationally televised program "The List" talks to some Granger ISS shelter consumers who say that the shelter was "money well spent".

Read the tornado shelter features to learn about the industry leading features provided by the Granger ISS Underground Storm Shelter.

Tornado Survivor: Granger ISS Shelter Choice "No Brainer"

One Alabama Tornado survivor says that her choice of a Granger ISS Tornado shelter was a "no brainer". Read the story below to learn about one tornado survivors experience and their underground shelter choice.

Industry leading features

Granger's in-ground safety shelter has features found only in this unit. Design, size and material all play into this unique tornado shelter.

Various other special features of the ISS consist of formed seating molded in to the unit, LED light, two articulating hand rails, easy three step entry, 2 sources of ventilation, simple setup and installation and incomparable lifespan providing security for generations.

Weighing about 1300 lbs. it is easily transported and moved for installation. Able to be shipped in a standard size truck or transported on something as small as a landscape trailer, moving the Granger ISS is easy. It also comes standard with four stainless steel lifting lanyards making it easier to secure, strap, and load.

The 5 layer door is an exclusive element of the Granger ISS underground tornado shelter. The multiple layers offer industry leading protection not found on any other underground tornado shelter. The exterior panel is available in a variety of colors while the interior of the door is white as is the body of the unit for maximum light reflection. The door comes standard with a gas shock system for easier entry and exit, three interior locks for ultimate security and easy spot, easy grab handles for the safest operation. The door of the Granger ISS is FEMA 320 and 361 exceeding.

The rotationally molded polyethylene body of this tornado shelter features double wall construction offering the most durable shelter design available. The 1/2" outside and 1/2" interior walls are filled with VOC exempt dimensionally safe foam. This assures exceptional rigidity, uncomplicated installation in practically any scenario as well as offers superior condensation resistance. This allows for the Granger ISS to be installed in many locations that other shelters may be restricted by such issues as high water tables, different soil conditions or tight areas.

Various other features of the ISS include generous molded in seating, LED light, dual articulating hand rails, multiple sources of ventilation, easy 3 step entry, simplest installation available and unsurpassed life span providing storm security for generations.

See why the Granger ISS is the United State's leading tornado shelter solution!

World Class Manufacturing

The Granger ISS In-ground Safety Shelter is manufactured by rotational molding specialist Granger Plastics Company. Granger Plastics is known worldwide for uncompromising quality and skill. Trusted by many industries to produce life saving products Granger has the experience to keep your family safe.

For those wishing to provide extra protection from a variety of emergencies Granger now offers the Granger ISS storm shelter door with an UL tested bullet resistant door! With multiple indoor and outdoor installation options available this additional panel upgrade easily transforms your underground shelter into a reinforced panic room providing your household the fullest security! Read more about bullet resistant shelter door options on our features page!