Monday's outbreak yielded at least six EF-3 tornadoes in the in the Norman Forecast Office coverage area, which includes 48 counties roughly in the western two-thirds of Oklahoma. Damage from an EF-2 and three EF-1 tornadoes has also been surveyed.
The results are preliminary and other damage areas are being investigated.
The Enhanced Fujita Scale is used to assign a tornado a 'rating' based on estimated wind speeds and related damage. When tornado-related damage is surveyed, it is compared to a list of damage indicators and degrees of damage which help estimate better the range of wind speeds the tornado likely produced. From that, a rating from EF0 to EF5 is assigned. Information released today is preliminary with other damage areas still being investigated.
The Moore to Tecumseh EF-3 tornado had a maximum width of about a half-mile to three-quarters of a mile with a 23-mile track. An EF-3 tornado which took a track from Tecumseh to Cromwell and had a maximum width of three-quarters to one mile wide.
The northern Pottawatomie County EF-3 tornado and the Norman to Little Axe to Pink North EF-3 tornado each had maximum widths of about a half-mile, according to the report. An EF-3 was also hit an area in Carter County, north, northwest of Lone Grove and another EF-3 struck an area of Kay County.
Power outages and shortages are among the lingering issues in the wake of Monday's tornadoes.
Work continues today at the Lake Stanley Draper water treatment plant, which is Oklahoma City's main water treatment plant. Power hasn't been restored because of the amount of tree damage around the plant, said Zach Nash, spokesman for the city of Oklahoma City. The plant is operating with generators at 20 percent capacity, leaving some in the southern metro area with low water pressure or no water at all.
In Norman, a mandatory ban on outdoor watering is in place and residents are asked to conserve water overall until they can restore power to pumps used to bring water from Lake Thunderbird to the water treatment plant.
Norman Utilities Director Ken Komiske said the city is using one emergency generator, but is only getting about 25 percent of the water it usually gets from the lake because of a power outage. Norman's backup plan is to buy water from Oklahoma City and use an emergency connector to get it pumped to the Norman plant. Norman can't do that this time because of the issues at the Lake Stanley Draper plant.
As of this morning, the OG&E System Watch shows 6,273 customers without electricity, including 5,815 in the Oklahoma City metro area. There are 1,920 customers still affected in McLoud and 1,359 in Norman.
INJURIES AND DAMAGE
Central Oklahoma hospitals treated 110 people after the storm. A dozen people, including three children, were still in the hospital this morning. The children are in serious, critical and fair conditions, hospital officials said. The majority of the victims — 98 people — were released from hospitals after being treated.
The largest number of injured were taken to Norman Regional Hospital and Moore Medical Center. Of the 70 patients, five people were admitted to the hospital in fair condition.
Oklahoma City Emergency Management's preliminary damage assessment determined that 72 dwellings or businesses were destroyed, 483 were damaged, and 226 were affected in some way.
WHAT ABOUT TODAY?
The National Weather Service issued a tornado watch this afternoon for 19 counties in much of Central and Western Oklahoma. The main impacts could be hail larger than baseballs, isolated tornadoes and damaging straight line winds and heavy rain.