Effective May 25, 2015, 12:30pm EDT
As of 12:30pm EDT, May 25th, the Weather Channel's Dr. Greg Forbes issued a 50% probability of a tornado for Central and East Texas. Dr. Forbes is a severe weather expert who developed the TOR:CON index which estimates the risk of a tornado.
According to the Weather.com, TOR:CON index ranges from 0 to 10. The index values are 8+ Very high probability of a tornado; 6 - High probability of a tornado; 4 - Moderate chance of a tornado nearby, but hail and/or high wind gusts possible; 2 - Low chance of a tornado, but hail and/or high wind gusts possible; and 0 - Near-zero chance of a tornado or a severe thunderstorm.
To calculate percentage, multiply the TOR:CON value by 10 for the chance of a tornado within 50 miles of a location.
Monday, May 25, 2015 - Severe thunderstorms in central and east TX, east of a line from near Childress to Abilene to Fort Stockton, southeast OK, southwest AR, northwest LA. TOR:CON - 5 central and east TX.
Isolated to scattered severe thunderstorms in west-central TX, southeast MN, north and west IA, southeast and south-central NE, central and east KS, central and east OK, northwest AR, west MO. TOR:CON - 3 southeast NE, southwest IA, northeast KS; 2 to 3 rest of area.
A chance of isolated severe thunderstorms in west IN, central and south IL, southeast MO, west KY, west TN, east AR, MS, LA. TOR:CON - 2.
The above information is available at the following link - TOR:CON Index, Exclusively From The Weather Channel (http://www.weather.com/tv/shows/amhq/news/tornado-torcon-index)